Straw spin-throwing, crushing, burning and returning to field integrated machine

Abstract

The application discloses a straw rotary throwing and breaking on-site burning and returning to field integrated machine, which comprises a power assembly, a stubble removing assembly, a ploughing and burying assembly, a frame, a burning assembly and a smoke treatment assembly; the stubble removing assembly comprises a rotary driving roller and a stubble removing part, and the rotary driving roller drives the stubble removing part to throw and send the straw upwards from bottom to top along the forward direction of the machine; the burning assembly comprises a semi-closed burning shell with an opening downward and at least one group of flame nozzles, and the straw broken and thrown by the stubble removing assembly passes through the flame area of the flame nozzles; the smoke treatment assembly comprises a negative pressure fan and a smoke treatment unit, which form a negative pressure environment in the burning shell. The straw stubble left on the ground and the straw scattered in the field are crushed in the stubble removing process, and the burned straw is buried into the soil by the ploughing and burying assembly after multi-stage suspended burning, and the smoke in the treatment process is treated by the smoke treatment assembly, so that the purpose of efficiently treating a large amount of surplus straw without polluting the environment is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a crop straw processing machine, in particular to a straw rotary throwing and crushing on-site burning and returning to field integrated machine, belonging to the technical field of agricultural machinery. BACKGROUND

[0002] Straw is the general term for the stem and leaf (ear) part of mature crops. Straw usually refers to the remaining part of wheat, rice, corn, potato, rape, cotton and other crops after harvesting seeds. More than half of the products of photosynthesis of crops exist in straw, which is rich in nitrogen, phosphorus, potassium, calcium, magnesium and organic matter.

[0003] Farmers have a long history of using crop straw. Due to the low level of agricultural production and low yield in the past, the amount of straw was small, and most of the straw was burned as fuel except for a small amount used for gasket and feeding livestock. With the development of agricultural production, the grain yield has increased significantly, and the amount of straw has also increased. In addition, the promotion of coal-saving and coal-saving technology and the popularization of coal and liquefied gas have made a large amount of straw surplus in rural areas.

[0004] Therefore, the current treatment of surplus straw has become a major problem in the process of agricultural development in China. From the perspective of agricultural development, returning straw to the field is the most beneficial treatment method. There are currently many forms of straw returning to the field, which can be divided into direct returning to the field and indirect returning to the field.

[0005] Indirect returning to the field includes general composting and returning to the field, and over-the-stomach returning to the field. Indirect returning to the field has the problems of high cost and difficulty in collecting straw, and the problem of long processing period.

[0006] Direct returning to the field is divided into two types: turning and covering. Turning and returning to the field is to turn the crop straw into the soil before sowing or transplanting the next crop after harvesting. Covering and returning to the field is to directly cover the crop straw or stubble on the soil surface. The straw is only weathered and eroded, and is buried in the soil during the next plowing. Whether it is straw covering or turning, the amount of straw returning to the field needs to be considered. If the amount of straw is too much, it is not conducive to the decay of the straw, and even affects the growth of seedlings, leading to crop yield reduction. The existing direct returning to the field technology has the problem of not being able to return all the straw directly, and a large amount of excess straw cannot be treated. At the same time, direct returning to the field also has the problem of disease, pest and weed, which increases the use of pesticides.

[0007] Traditional burning and returning to the field is divided into two types: concentrated burning and on-site burning. Concentrated burning can solve the problem of smoke and dust during burning, but it also has the problems of difficulty in collecting straw and high cost.

[0008] The reason why the on-site burning of straw in the field affects the environment is that the straw is relatively dense, has a high water content, and has a certain thickness of accumulation on the ground, making it difficult to create a good combustion environment, so the burning is not complete, resulting in a large amount of smoke and pollutant emissions. And because it is an uncontrollable combustion in an open environment, there is also a great risk of fire. Fires caused by on-site burning of straw in the field occur from time to time.

[0009] Although on-site burning produces a large amount of smoke, causes environmental pollution, and poses a fire risk, on-site burning is the most efficient and capable way to handle excess straw. The potassium, calcium, inorganic salts, and trace elements left over after burning can be used by plants, and the burning process kills insect eggs, pathogens, and grass seeds.

[0010] Chinese patent CN118009332A discloses a mobile straw field burning and carbonization machine, which rotates clockwise during machine advancement, bringing the straw and grass seeds and insect eggs attached to the ground away from the ground and operating to the rear of the loosening device. Before the straw falls to the ground, the ignition device ignites the straw. The rear end of the straw loosening device is equipped with a fire-throwing roller, which rotates clockwise at high speed, throwing the upper layer of burning straw forward to ensure that the straw continues to burn even when the igniter is not working. As the machine advances, the ignited straw enters the carbonization chamber, and the straw burns on the ground surface. The rear part of the carbonization chamber is equipped with a secondary loosening roller, which is connected to the fireproof plate to further loosen the straw, avoid unburned straw and grass seeds, ensure uniform burning and heating, and better kill insects and sterilize. The straw that has burned to a certain extent is returned to the soil by the rotary tiller device, and the incompletely burned straw is further carbonized in the oxygen-deficient environment under the soil layer using its own residual heat.

[0011] The scheme uses the principle of self-ignition of accumulated burning of straw after loosening. The scheme only picks up, without a crushing process; therefore, the ignition and burning speed will be relatively slow, which will seriously restrict the operation speed, and it cannot be popularized in areas with short stubble periods. And this scheme has high requirements for the size and dryness of the straw, and there are problems of not being able to ignite and continuously burn fresh straw. And the smoke treatment device uses a centrifugal separation device and a pull-out type core replacement device, which cannot effectively control large particles in the smoke dust. The amount of smoke dust is very large during operation, the filter core is easily blocked, and the filter core needs to be replaced frequently, increasing the use cost.

[0012] Chinese patent CN119138190A discloses an automatic straw collection underground incineration and field application equipment, which uses a collection shovel to cut off and collect straw, removes soil and stones in the collected straw through a processing mechanism, and presses the straw, crushes the pressed straw into straw debris, sprays fuel particles on the straw debris, fills the crushed straw into a groove, covers it with soil, and burns it in a covered state.

[0013] However, the collection shovel of this scheme is arranged at the front end of the vehicle body and inclines upward from front to back, which cannot cut off the stubble and inserts into the soil, causing a large amount of soil to enter the processing mechanism and affecting the processing efficiency; the complex structure and process of this scheme seriously affect the processing efficiency of the straw, and cannot be applied in areas with short stubble period; burning in a covered state still has the problem of environmental pollution caused by unprocessed smoke overflow, and the uncontrolled burning also has the safety hazard of causing forest fires. SUMMARY

[0014] The purpose of the present application is to solve the problems in the prior art, and provide a straw rotary throwing and crushing in-situ incineration and field application integrated machine. The stubble after harvesting and the scattered straw in the field are crushed during the stubble removal process, and after multiple levels of suspension incineration, the incinerated straw is buried in the soil by the plowing and burying assembly, and the smoke during the processing process is treated by the smoke treatment assembly, so that the purpose of efficiently processing a large amount of surplus straw without polluting the environment is achieved.

[0015] Technical scheme: A straw rotary throwing and crushing in-situ incineration and field application integrated machine, comprising a power assembly, a stubble removal assembly, a plowing and burying assembly, a vehicle frame, an incineration assembly and a smoke treatment assembly; the power assembly provides power to the stubble removal assembly, the plowing and burying assembly, the incineration assembly and the smoke treatment assembly respectively; the stubble removal assembly and the plowing and burying assembly are fixedly installed on the vehicle frame from front to back at the same time.

[0016] The stubble removal assembly comprises a rotary drive roller and a stubble removal part arranged on the circumferential surface of the rotary drive roller, and the rotary drive roller drives the stubble removal part to throw the straw upward from bottom to top in the forward direction of the whole machine.

[0017] The incineration assembly comprises a downwardly open half-enclosed incineration shell and at least one group of flame nozzles, the stubble removal assembly is located in the incineration shell, and the flame nozzles are installed on the inner side of the incineration shell, and the straw crushed and thrown by the stubble removal assembly passes through the flame area of the flame nozzles.

[0018] The smoke treatment assembly comprises a negative pressure fan for forming a negative pressure environment in the incineration shell and a smoke treatment unit, and the smoke treatment unit communicates with the inside of the incineration shell through the negative pressure fan.

[0019] The commonly used stubble cleaner currently usually adopts positive rotation counterclockwise rotation, which can avoid smoke and dust spreading to the front cab, the stubble cleaning assembly of the present application hammers and rotates up the stubble and broken straw on the ground and hammers and sends clockwise counterclockwise, which is gradually broken into flocculent; the flocculent straw is burnt and roasted by the burning and roasting assembly, and is burnt and roasted and self-ignites, at the same time, the bacteria, insect eggs and weed seeds attached to the straw are fully burnt and roasted and inactivated; the grass ash and unburnt straw fall to the ground and then enter the plowing and burying assembly and are mixed and buried into the soil, the unburnt straw in the surface and shallow soil continues to burn or smolder, the integration of the stubble cleaning assembly and the plowing and burying assembly improves the operation efficiency; the negative pressure fan collects the dust generated by stubble cleaning and rotary plowing, the smoke generated by burning and roasting and the smoke generated by unburnt straw burning or smoldering, and then concentrates the treatment through the smoke treatment unit; the purpose of efficiently treating a large amount of surplus straw under the premise of not polluting the environment is achieved.

[0020] The present application realizes efficient treatment of straw through the integration of the stubble cleaning assembly and the burning and roasting assembly, which is no longer simply accumulated and burned, its main function is to treat the wax layer on the surface of the straw through physical crushing and high-temperature flame, destroy its structure, improve its biodegradability and enzymatic efficiency, and thus increase the composting efficiency after being buried in the soil.

[0021] At the same time, the inactivation of bacteria, insect eggs and weed seeds mainly relies on the burning and roasting flame, rather than on the self-ignition of the straw, which has a higher temperature and a faster inactivation speed, even if the straw does not burn due to too high water content, it does not affect the inactivation effect of the burning and roasting flame on the pests and weeds.

[0022] Preferably, in order to effectively form a negative pressure environment to concentrate the treatment of the smoke polluting the environment, and at the same time realize controllable burning and roasting of the straw, the burning and roasting shell comprises a burning and roasting shell body, a front sealing device installed at the front end of the burning and roasting shell body, side plates located on both sides of the burning and roasting shell body and a rear sealing device installed at the rear end of the burning and roasting shell body, the front sealing device, the rear sealing device and the side plates on both sides of the burning and roasting shell body are respectively attached to the ground. Form a downward opening semi-closed chamber, the whole burning and roasting chamber is approximately in a sealed state, which is more conducive to forming a negative pressure environment to concentrate the treatment of the smoke polluting the environment, at the same time, the burning and roasting flame and the straw are controllable combustion in the burning and roasting chamber, preventing the flame from overflowing.

[0023] Preferably, in order to prevent the fire from igniting the surrounding straw, the side plates on both sides of the burning and roasting shell body are provided with plow plate structures, and the two side plow plate structures plow to both sides along the forward direction. In the working state, the plow plate structure plows into the soil 1cm-2cm, so as to realize better sealing effect; during the whole machine advancing process, the plowing effect of the plow plate structure separates the straw on both sides from the burning and roasting shell, thereby effectively preventing the fire from igniting the surrounding straw.

[0024] Preferably, in order to improve work efficiency while reducing cost, the stubble cleaning assembly and the plowing and burying assembly are located inside the incineration shell simultaneously. The present application simultaneously installs the stubble cleaning assembly and the plowing and burying assembly inside the incineration shell of the integral structure, and after the stubble cleaning assembly hammers and sends the surface stubble and the broken straw and the incineration assembly incinerates, the stubble cleaning assembly is directly buried into the soil by the plowing and burying assembly; the synchronization of the straw crushing, throwing, incineration and plowing and burying is realized, and the work efficiency is effectively improved. The cost of the agricultural machinery is also one of important factors affecting the promotion of equipment, and the present application adopts the integral incineration shell structure, so that the structure is simpler, the manufacturing cost is lower, and the overall cost can be effectively reduced.

[0025] Preferably, in order to improve the inactivation effect of plant diseases, insect pests and weeds and facilitate the collection of flue gas, the incineration shell is provided with a partition device, the partition device is arranged along the longitudinal direction to divide the incineration shell into two independent incineration cavities and plowing and burying cavities which are open downward and half-closed,

[0026] The stubble cleaning assembly is located in the incineration cavity, and the plowing and burying assembly is located in the plowing and burying cavity.

[0027] The flue gas treatment unit is in communication with the incineration cavity and the plowing and burying cavity through a negative pressure fan respectively.

[0028] The present application divides the semi-closed incineration shell into two relatively small semi-closed spaces through the partition device, which is more conducive to the establishment of a negative pressure environment and facilitates the centralized treatment of flue gas dust; secondly, since the suitable temperature of crop plant diseases, insect pests and weeds and their pathogens, insect eggs and weed seeds is mostly 20-30 DEG C, high-temperature inhibition occurs at about 40 DEG C, and inactivation occurs at about 100 DEG C for 1-2 minutes, and the higher the environmental temperature, the shorter the inactivation time, therefore the relatively small incineration cavity can play a role in the heat preservation and inactivation of the plant diseases, insect pests and weeds and their pathogens, insect eggs and weed seeds attached to the straw, the surface and the shallow layer of the soil.

[0029] Preferably, in order to ensure the partition and sealing effect and play a role in extinguishing open fires, the partition device is a retractable rolling sealing roller, and the retractable rolling sealing roller is in rolling contact with the ground. The retractable rolling sealing roller can effectively partition the incineration cavity and the plowing and burying cavity to play a partition and sealing effect, and the entire incineration cavity is in a sealed state, the incineration flame and the straw are controllable combustion in the incineration cavity, and the flame overflow can be prevented; at the same time, in the process of advancing the whole machine, the retractable rolling sealing roller automatically performs ground profiling and keeps rolling contact with the ground, which can improve the sealing effect and effectively extinguish open fires and prevent fire jumping.

[0030] Preferably, in order to ensure the blocking effect and at the same time play a role in extinguishing open fire, the blocking device is a flexible fire curtain, and the bottom of the flexible fire curtain is laid on the ground. The flexible fire curtain can be a metal curtain or a fire curtain made of other materials. During the movement of the whole machine, the fire curtain is dragged on the ground, which can adapt to the ground undulation to better extinguish open fire and block effect.

[0031] Preferably, in order to effectively form a negative pressure environment to concentrate the treatment of smoke from the polluted environment, and at the same time realize the controllable burning of the straw, the inside of the burning shell is independently formed into a downwardly open and semi-closed burning cavity.

[0032] The ploughing and burying assembly comprises a ploughing and burying cavity and a ploughing and burying device.

[0033] The stubble removing assembly is located in the burning cavity, and the ploughing and burying device is located in the ploughing and burying cavity.

[0034] The smoke treatment unit is connected with the burning cavity and the ploughing and burying cavity through a pipeline connected with a negative pressure fan.

[0035] The burning cavity and the ploughing and burying cavity are two mutually independent cavities with downwardly open and semi-closed cavities. First, it is more conducive to the establishment of a negative pressure environment, and facilitates the centralized treatment of smoke dust. Second, because the suitable temperature of crop pests, diseases and weeds and their pathogens, insect eggs and grass seeds is mostly 20-30℃, and high-temperature inhibition will occur at about 40℃, and inactivation will occur at about 100℃ for 1-2 minutes, and the higher the environmental temperature, the shorter the inactivation time, therefore, the relatively small space of the burning cavity can play a role in the heat preservation and inactivation of the pests, diseases and weeds and their pathogens, insect eggs and grass seeds attached to the straw, the ground and the shallow layer of the soil.

[0036] Preferably, in order to ensure the blocking effect and at the same time play a role in extinguishing open fire, the rear blocking device is a retractable rolling sealing roller, and the retractable rolling sealing roller is in rolling contact with the ground. The retractable rolling sealing roller can effectively improve the blocking effect of the burning cavity, and the whole burning cavity is approximately in a sealed state, the burning flame and the straw are controllably burned in the burning cavity, which can prevent the flame from overflowing; at the same time, during the movement of the whole machine, the retractable rolling sealing roller automatically performs ground profiling and keeps rolling contact with the ground, which can improve the sealing effect and effectively extinguish open fire and prevent fire from jumping.

[0037] Preferably, in order to ensure the blocking effect and at the same time play a role in extinguishing open fire, the rear blocking device is a flexible fire curtain, and the bottom of the flexible fire curtain is laid on the ground. The flexible fire curtain can be a metal curtain or a fire curtain made of other materials. During the movement of the whole machine, the fire curtain is dragged on the ground, which can adapt to the ground undulation to better extinguish open fire and block effect.

[0038] Preferably, in order to improve the crushing effect and burning effect of the straw, the stubble cleaning assembly is located near the front end of the burning shell body in the burning shell, forming an arc structure gradually expanding from front to back.

[0039] The cavity formed by the front end of the stubble cleaning assembly and the inner wall of the front end of the burning shell body is a straw crushing cavity.

[0040] The starting end of the expanding cavity to the flame area of the flame jet of the flame jet head is a rotary throwing cavity.

[0041] The cavity from the start of the flame area of the flame jet of the flame jet head to the tail of the burning shell body is a combustion cavity.

[0042] The straw crushing cavity formed by the front end of the stubble cleaning assembly and the inner wall of the front end of the burning shell body is a narrow space that gradually converges from bottom to top. The straw can be hit multiple times by colliding back and forth between the stubble cleaning assembly and the burning shell body, and the straw can be crushed better by being squeezed through the converging straw crushing cavity at the top. After the crushed straw passes through the space of the rotary throwing cavity, it forms dispersed and fluffy straw, which can fully contact with air and increase the contact area between the straw and the flame, thereby improving the burning effect.

[0043] Preferably, in order to facilitate the mixing of wood ash and unburned straw with the soil, the plowing and burying assembly is a rotary plowing machine structure that rotates from top to bottom along the forward direction of the machine. It is called a counterclockwise rotating rotary plowing device in the industry. By mixing and burying the wood ash and unburned straw into the soil through the counterclockwise rotating rotary plowing device, the soil structure can be effectively improved, and the unburned straw can be buried in the soil, which is beneficial to further decomposition in the later period.

[0044] Preferably, in order to improve the crushing effect of the stubble cleaning device, the stubble cleaning part is a stubble cleaning hammer head hingedly installed on the circumferential surface of the rotary driving roller. The stubble cleaning hammer head includes a hammer head bent in the longitudinal direction and a connecting part hingedly connected with the rotary driving roller. The hammer head bent in the longitudinal direction can increase the hammering surface and improve the crushing effect of the straw; the hingedly connected stubble cleaning hammer head and the rotary driving roller can improve the crushing effect of the straw, and can also adapt to the uneven field surface, which protects the stubble cleaning hammer head and improves the service life of the machine.

[0045] Preferably, in order to improve the inactivation effect of pests and weeds, the burning assembly includes a ground burning jet head, which is installed inside the burning chamber housing behind the stubble cleaning assembly and faces the ground. The ground burning jet head burns the ground and the stubble before the wood ash and the unburned straw fall to the ground, thereby inactivating the bacteria, insect eggs and weed seeds on the ground and the stubble, and further improving the inactivation effect of pests and weeds.

[0046] Preferably, in order to improve the incineration effect, the incineration shell is provided with a spray head mounting chamber extending to the periphery of the incineration shell at the mounting position of the flame spray head, and the spray head mounting chamber is sealingly connected with the incineration shell. Under the premise of maintaining the closed effect of the incineration shell, the outer flame incineration is realized by extending the distance between the flame spray head and the straw, thereby improving the incineration effect.

[0047] Preferably, in order to improve the incineration effect, the flame spray head is arranged non-perpendicularly to the rotation direction of the straw. Under the premise of ensuring that the flocculent straw passes through the incineration flame area, the overfire time of the flocculent straw is increased by tilting the flame spray direction of the flame spray head, thereby improving the incineration effect and reducing energy consumption.

[0048] Preferably, in order to further improve the incineration effect, the flame spray direction of the flame spray head is the same as or opposite to the rotation direction of the straw. When the flame spray direction of the flame spray head is the same as or opposite to the rotation direction of the straw, the overfire time of the straw is the longest, thereby further improving the incineration effect.

[0049] Preferably, in order to realize the effect of energy saving and consumption reduction, at least two groups of flame spray heads are arranged in the incineration shell. In order to reduce the consumption of incineration flame gas and reduce the operation cost, by monitoring the straw burnout rate in real time, the method of hierarchical incineration and separately controlling the flame intensity of each level is adopted to maximize the operation efficiency and reduce the operation cost.

[0050] Preferably, in order to improve the incineration effect, the straw is preheated before flame incineration, and a fresh air system is arranged at the front end of the incineration shell. The fresh air system includes a fan, a heat exchange device and a fresh air preheating pipeline. The fan is communicated with the inside of the incineration shell through the fresh air preheating pipeline, and the fresh air preheating pipeline is non-contact heat exchanged with the flue gas treatment assembly through the heat exchange device before being communicated with the incineration shell.

[0051] The high-temperature flue gas is non-contact heat exchanged with the fresh air to reduce the temperature of the flue gas and preheat the fresh air. The preheated fresh air enters the incineration shell through the air outlet and preheats the straw. The air inlet of the fan is arranged in front of the power assembly, and the fan is supplied with air by the positive pressure fan to avoid the influence of dust on the fresh air system during the process of removing the stubble. The blowing of a large amount of hot air by the fresh air system can play a combustion-supporting role and reduce the content of carbon monoxide.

[0052] Preferably, in order to improve the treatment effect of dust in the flue gas, the flue gas treatment assembly includes an ammonia water spraying device. The ammonia water spraying device sprays ammonia water to purify the pollutants in the flue gas and performs defogging treatment on the flue gas. The purified clean flue gas is directly discharged into the atmosphere, which can solve the environmental pollution problem caused by straw incineration.

[0053] Preferably, in order to achieve the effects of fertilizer returning to field and eliminating fire risk, the waste liquid discharge port of the ammonia water spraying device is located at the rear end of the ploughing and burying assembly. The ammonia water waste liquid is sprayed as liquid fertilizer on the soil behind the rotary cultivator, which has just been rotary cultivated and mixed with unburnt straw. A large amount of nitrogen fertilizer is needed for the straw during the composting process. The discharge of the ammonia water waste liquid can supplement the required nitrogen fertilizer, and the amount of nitrogen fertilizer can be reduced. Therefore, the fertilizer and spraying fire extinguishing effects can be combined to eliminate the risk of fire.

[0054] Beneficial effects: The present application pulverizes the stubble on the ground and the straw scattered in the field during the stubble removing process, and buries the burnt straw into the soil through the ploughing and burying assembly after multi-stage suspension burning and roasting. At the same time, the smoke gas treatment assembly treats the smoke gas during the treatment process, so as to achieve the purpose of efficiently treating a large amount of surplus straw without polluting the environment. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0056] Figure 1 It is a schematic diagram of the whole machine structure of the present application;

[0057] Figure 2 It is a schematic diagram of the structure of the tool part after removing the power assembly of the present application;

[0058] Figure 3 It is a schematic diagram of the structure of the stubble removing assembly of the present application;

[0059] Figure 4 It is a schematic diagram of the structure of the burning and roasting assembly of the present application;

[0060] Figure 5 It is a schematic diagram of the structure of the burning and roasting shell of the present application;

[0061] Figure 6 It is a front view of the whole burning and roasting shell body embodiment of the present application;

[0062] Figure 7 It is a top view of the burning and roasting shell of the present application;

[0063] Figure 8 It is a schematic diagram of the structure of the first embodiment of the partition device of the present application;

[0064] Figure 9 It is a schematic diagram of the structure of the second embodiment of the partition device of the present application;

[0065] Figure 10Structure diagram of a first embodiment of the post-closing device of the application;

[0066] Figure 11 Structure diagram of a first embodiment of the post-closing device of the application;

[0067] Figure 12 Layout diagram of the interior of the incineration shell. DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the application will be clearly and completely described in connection with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0069] In the description of the application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0070] In the application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "on" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "under" and "under" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. Embodiment one

[0071] As shown in FIGS. Figure 1 , 2 and 3, a straw rotary throwing and crushing in-situ incineration and field returning integrated machine comprises a power assembly 1, a stubble removing assembly 2, a plowing and burying assembly 3, a frame 4, an incineration assembly 5 and a flue gas treatment assembly 6; the power assembly 1 provides power to the stubble removing assembly 2, the plowing and burying assembly 3, the incineration assembly 4 and the flue gas treatment assembly 5 respectively, and the stubble removing assembly 2 and the plowing and burying assembly 3 are fixedly installed on the frame 4 from front to back at the same time;

[0072] The stubble cleaning assembly 2 comprises a rotating driving roller 21 and a stubble cleaning part 22 arranged on the circumferential surface of the rotating driving roller 21, and the rotating driving roller 21 drives the stubble cleaning part 22 to throw the straw upward from below along the forward direction of the whole machine;

[0073] The burning assembly 5 comprises a semi-closed burning shell 51 with an opening downward, and at least one group of flame nozzles 52, the stubble cleaning assembly 2 is located in the burning shell 51, and the flame nozzles 52 are installed on the inner side of the burning shell 51, and the straw broken and thrown by the stubble cleaning assembly 2 passes through the flame area of the flame nozzles 52;

[0074] The smoke treatment assembly 6 comprises a negative pressure fan 61 for forming a negative pressure environment in the burning shell 51 and a smoke treatment unit 62, and the smoke treatment unit 62 is connected with the inside of the burning shell 51 through a pipeline 63 connected by the negative pressure fan 61.

[0075] In the embodiment, a tractor is used as the power assembly 1, and the height is adjusted through the three-point suspension of the tractor. In actual operation, the support force of the tillage and burying assembly 3 and the pulling force of the three-point suspension of the tractor are balanced with the gravity of the machine tool.

[0076] The self-propelled power assembly can also be used to realize the walking and power output of the whole machine.

[0077] In the embodiment, the tillage and burying assembly 3 adopts a rotary tiller structure rotating from above to below along the forward direction of the whole machine, which is called a counterclockwise rotating rotary tillage device in the industry. The grasswood ash and unburned straw are mixed and buried into the soil through the counterclockwise rotating rotary tillage device, which can effectively improve the soil structure and facilitate the burying of unburned straw into the soil, which is beneficial to further decomposition in the later period.

[0078] The tillage and burying device can also be other tillage and burying devices such as a plow, and the optimal rotary tillage structure scheme is adopted in the embodiment.

[0079] The commonly used stubble cleaner usually adopts positive rotation counterclockwise rotation, which can avoid the diffusion of smoke and dust to the forward cab. The reverse rotation stubble cleaning assembly 2 is used in the application to hammer and rotate the stubble and broken straw on the ground clockwise and hammer them, which are gradually broken into flocculent; the flocculent straw is burned and suspended and self-ignites through the burning assembly 5, and the bacteria, insect eggs and weed seeds attached to the straw are fully burned and inactivated; the grasswood ash and unburned straw fall to the ground and then enter the tillage and burying assembly 3 and are mixed and buried into the soil, and the unburned straw in the surface soil continues to burn or smolder, and the integration of the stubble cleaning assembly 2 and the tillage and burying assembly 3 improves the operation efficiency; the negative pressure fan 61 collects the dust generated by the stubble cleaning and rotary tillage, the smoke generated by the burning and the smoke generated by the unburned straw burning or smoldering, and then the smoke is treated through the smoke treatment unit 62; the purpose of efficiently treating a large amount of surplus straw without polluting the environment is achieved.

[0080] The present application realizes efficient treatment of straw by integration of the stubble cleaning assembly 2 and the burning assembly 5, and no longer simply piles up and burns. The main function is to treat the wax layer on the surface of the straw by physical crushing and high-temperature flame, destroy the structure, improve the biodegradability and enzymatic efficiency, and thus increase the composting efficiency after being buried in the soil.

[0081] At the same time, the inactivation of the bacteria, eggs and weed seeds mainly relies on the burning flame, rather than the spontaneous combustion of the straw, and the temperature is higher and the inactivation speed is faster. Even if the straw does not burn due to too high water content, it does not affect the inactivation effect of the burning flame on the diseases, pests and weeds.

[0082] As shown in Figure 4 and 5 , in order to effectively form a negative pressure environment to concentrate the treatment of smoke from the polluted environment, and at the same time realize the controllable burning of the straw, the burning shell 51 includes a burning shell body 511, a front sealing device 512 installed at the front end of the burning shell body 511, side plates 513 located on both sides of the burning shell body 511, and a rear sealing device 514 installed at the rear end of the burning shell body 511. The front sealing device 512, the rear sealing device 514 and the side plates 513 on both sides of the burning shell body 511 are respectively attached to the ground. Form a semi-closed chamber with the opening downward, the whole burning shell 51 is approximately in a sealed state, which is more conducive to forming a negative pressure environment to concentrate the treatment of smoke from the polluted environment, and at the same time, the burning flame and the straw are controllable combustion in the burning chamber, preventing the flame from overflowing.

[0083] As shown in Figure 5 , 6 and 7, in order to prevent the jumping fire from igniting the surrounding straw, the side plates 513 on both sides of the burning shell body 511 are provided with plow plate structures 515, and the two side plow plate structures 515 plow along the advancing direction to both sides. In the working state, the plow plate structure 515 plows into the soil 1cm-2cm, so as to realize better sealing effect; during the advancing process of the whole machine, the straw on both sides is separated from the burning shell 51 by the plowing effect of the plow plate structure 515, thereby effectively preventing the jumping fire from igniting the surrounding straw.

[0084] As shown in Figure 6As shown, in order to improve work efficiency while reducing costs, the stubble cleaning assembly 2 and the plowing and burying assembly 3 are located inside the incineration shell 51. The present application simultaneously installs the stubble cleaning assembly 2 and the plowing and burying assembly 3 inside the integral structure of the incineration shell 51, and after the ground stubble and broken straw are sent by the stubble cleaning assembly 2 and incinerated by the incineration assembly, they are directly buried into the soil by the plowing and burying assembly 3; the synchronization of straw crushing, throwing, incineration and plowing is realized, and the work efficiency is effectively improved. The cost of agricultural machinery is also one of the important factors affecting the promotion of equipment, and the present application adopts the integral incineration shell 51 structure, which makes the structure simpler and the manufacturing cost lower, and can effectively reduce the overall cost.

[0085] As shown in Figure 6 , 8 and 9, in order to improve the inactivation effect of pests and diseases and facilitate the collection of flue gas, the incineration shell 51 is provided with a partition device 53, which is arranged along the longitudinal direction to separate the incineration shell 51 into two independent open downward semi-closed incineration cavities 54 and plowing cavities 31,

[0086] The stubble cleaning assembly 2 is located in the incineration cavity 54, and the plowing and burying assembly 3 is located in the plowing cavity 31.

[0087] The flue gas treatment unit 62 is connected to the pipe 63 through the negative pressure fan 61, and is in communication with the incineration cavity 54 and the plowing cavity 31 respectively.

[0088] The present application separates the semi-closed incineration shell 51 into two relatively small semi-closed spaces by the partition device 53, which is more conducive to the establishment of a negative pressure environment and facilitates the centralized treatment of flue gas dust; secondly, since the suitable temperature of crop pests, diseases and weeds and their pathogens, insect eggs and weed seeds is mostly between 20-30℃, high temperature inhibition will occur at about 40℃, and inactivation will occur at about 100℃ for 1-2 minutes, so the relatively small incineration cavity can play a role in the incubation and inactivation of pests, diseases and weeds and their pathogens, insect eggs and weed seeds attached to the straw, the ground and the shallow soil.

[0089] As shown in Figure 9 , in order to ensure the partitioning and sealing effect and extinguish open flames, the partition device 53 is a retractable rolling sealing roller which is in rolling contact with the ground. The retractable rolling sealing roller can effectively partition the incineration cavity 54 and the plowing cavity 31 to achieve the partitioning and sealing effect, and the entire incineration cavity 54 is in a state of approximate sealing, the incineration flame and the straw are controllable in the incineration cavity, and the flame overflow can be prevented; at the same time, during the running of the whole machine, the retractable rolling sealing roller automatically performs ground profiling and maintains rolling contact with the ground, which can improve the sealing effect and effectively extinguish open flames to prevent fire.

[0090] AsFigure 12 As shown, in order to improve the crushing effect and burning effect of the straw, the stubble cleaning assembly 2 is located in the burning shell 51 close to the front end of the burning shell body 511, forming an arc-shaped structure gradually expanding from front to back.

[0091] The cavity formed by the front end of the stubble cleaning assembly 2 and the front end of the burning shell body 511 is the straw crushing cavity 541.

[0092] The cavity from the starting end of the expansion to the flame area of the flame jet head 52 is the rotary throwing cavity 542.

[0093] The cavity from the beginning of the flame area of the flame jet head 52 to the tail of the burning shell 51 is the combustion cavity 543.

[0094] The straw crushing cavity 541 formed by the front end of the stubble cleaning assembly 2 and the front end of the burning shell body 511 is a narrow space that gradually converges from bottom to top. The straw can be hit multiple times by colliding back and forth between the stubble cleaning assembly 2 and the burning shell body 511, and can be extruded through the converging top of the straw crushing cavity, so that the crushing effect of the straw is better. After the crushed straw passes through the space of the rotary throwing cavity 542, it forms dispersed and fluffy straw, which can fully contact with air and increase the contact area of the straw and the flame, thereby improving the burning effect.

[0095] As shown, Figure 1 In order to facilitate the mixing of wood ash and unburned straw with soil, the plowing and burying assembly 3 is a rotary plowing machine structure rotating from top to bottom along the forward direction of the machine. It is called counterclockwise rotating rotary plowing device in the industry. The wood ash and unburned straw are mixed and buried into the soil by the counterclockwise rotating rotary plowing device, which can effectively improve the soil structure and facilitate the burial of unburned straw in the soil, which is beneficial to further decomposition in the later period.

[0096] As shown, Figure 3 In order to improve the crushing effect of the stubble cleaning device, the stubble cleaning part 22 is a stubble cleaning hammer head hingedly installed on the circumference of the rotary driving roller 21. The stubble cleaning hammer head includes a hammer head 221 bent in the longitudinal direction and a connecting part 222 hingedly connected with the rotary driving roller. The hammer head 221 bent in the longitudinal direction can increase the hammering surface and improve the crushing effect of the straw; the hingedly connected stubble cleaning hammer head and rotary driving roller 21 can form a hammering effect to improve the crushing effect of the straw, and can also adapt to the uneven field surface, which protects the stubble cleaning hammer head and improves the service life of the machine.

[0097] As shown, Figure 12As shown, in order to improve the inactivation effect of disease, insect and weed, the burning and incineration assembly includes a ground burning and incineration nozzle 55, which is installed inside the burning and incineration shell 51 behind the stubble removing assembly 2 and faces the ground. The ground burning and incineration nozzle 55 burns and incinerates the ground and stubble without straw coverage before the straw ash and the straw that has not been fully burned fall to the ground, so as to inactivate the bacteria, insect eggs and weed seeds on the ground and stubble, and further improve the inactivation effect of disease, insect and weed.

[0098] In order to improve the burning and incineration effect, the flame jet direction of the flame nozzle 52 is non-perpendicular to the straw rotating and throwing direction. Under the premise of ensuring that the flocculent straw passes through the burning and incineration flame area, the burning and incineration effect is improved and the energy consumption is reduced by tilting the flame jet direction of the flame nozzle 52 to increase the straw burning and incineration time.

[0099] In order to further improve the burning and incineration effect, the flame jet direction of the flame nozzle 52 is the same as or opposite to the straw rotating and throwing direction. When the flame jet direction of the flame nozzle 52 is the same as or opposite to the straw rotating and throwing direction, the straw burning and incineration time is the longest, and the burning and incineration effect is further improved.

[0100] In order to achieve the effect of energy saving and consumption reduction, at least two groups of flame nozzles 52 independent of each other are arranged in the burning and incineration shell 51. In order to reduce the burning and incineration flame gas consumption and reduce the operation cost, the straw burning rate is monitored in real time, and the method of hierarchical burning and incineration and separately controlling the flame intensity of each level is adopted, so as to maximize the operation efficiency and reduce the operation cost.

[0101] As shown in Figure 2 and 12 In order to improve the burning and incineration effect, the straw is preheated before flame burning and incineration. The burning and incineration shell 51 is provided with a fresh air system 7, which includes a fan 71, a heat exchange device 72 and a fresh air preheating pipeline 73. The fan 71 communicates with the inside of the burning and incineration shell 51 through the fresh air preheating pipeline 73. The fresh air preheating pipeline 73 is communicated with the burning and incineration shell 51 and then performs non-contact heat exchange with the smoke treatment assembly 6 through the heat exchange device 72.

[0102] The non-contact heat exchange is performed between the high-temperature smoke and the fresh air to reduce the smoke temperature and preheat the fresh air. The preheated fresh air enters the inside of the burning and incineration shell 51 through the air outlet and preheats the straw. The fan 71 is provided with an air inlet in front of the power assembly 1, and air is supplied by a positive pressure fan to avoid the influence of dust on the fresh air system during the stubble removing process. A large amount of hot air blown by the fresh air system 7 can play a combustion supporting role and reduce the content of carbon monoxide.

[0103] As shown in Figure 2 , 4, 5 and 6, in order to improve the treatment effect of dust in the flue gas, the flue gas treatment assembly 6 comprises an ammonia water spraying device. The ammonia water spraying device sprays ammonia water to purify the pollutants in the flue gas and performs demisting treatment on the flue gas. The purified clean flue gas is directly discharged into the atmosphere, which can solve the environmental pollution problem caused by straw burning.

[0104] In order to realize the effects of fertilizer returning to field and eliminating fire risk, the waste liquid discharge port 64 of the ammonia water spraying device is located at the rear end of the plowing and burying assembly 3. The ammonia water waste liquid is sprayed as liquid fertilizer on the soil behind the rotary cultivator which has just been rotary cultivated and mixed with unburned straw. A large amount of nitrogen fertilizer is needed during the composting process of the straw. The discharge of ammonia water waste liquid can supplement the required nitrogen fertilizer, and the application amount of nitrogen fertilizer can be reduced. Therefore, the fertilizer and spraying fire extinguishing effects can be combined to eliminate the fire risk. Example two

[0105] As shown in Figure 8 , in order to ensure the blocking effect and play a role in extinguishing open fire, the blocking device 53 is a flexible fireproof curtain, and the bottom of the flexible fireproof curtain is laid on the ground. The flexible fireproof curtain can be a metal curtain or a fireproof curtain made of other materials. During the running of the whole machine, the fireproof curtain is dragged on the ground, which can adapt to the ground undulation and play a better role in extinguishing open fire and blocking. Example three

[0106] As shown in Figure 4 and 5 , in order to effectively form a negative pressure environment to concentrate the treatment of flue gas in the polluted environment, and realize the controllable burning of straw, the burning shell 51 comprises a burning shell body 511, a front sealing device 512 installed at the front end of the burning shell body 511, side plates 513 located on both sides of the burning shell body 511, and a rear sealing device 514 installed at the rear end of the burning shell body 511. The front sealing device 512, the rear sealing device 514 and the side plates 513 on both sides of the burning shell body 511 are respectively attached to the ground. A semi-closed chamber with an opening downward is formed, and the whole burning shell 51 is approximately in a sealed state, which is more conducive to forming a negative pressure environment to concentrate the treatment of flue gas in the polluted environment. At the same time, the burning flame and the straw are controllably burned in the burning cavity, preventing the flame from overflowing.

[0107] As shown in Figure 10 and 11 , in order to effectively form a negative pressure environment to concentrate the treatment of flue gas in the polluted environment, and realize the controllable burning of straw, the inside of the burning shell 51 independently constitutes a semi-closed burning cavity 54 with an opening downward,

[0108] The plowing and burying assembly 3 comprises a semi-closed plowing and burying cavity 31 with an opening downward and a plowing and burying device 32,

[0109] The stubble cleaning assembly 2 is located in the incineration cavity 54, and the ploughing and burying device 32 is located in the ploughing and burying cavity 31.

[0110] The smoke treatment unit 62 is connected with the incineration cavity 54 and the ploughing and burying cavity 31 through the pipeline 63 connected with the negative pressure fan 61.

[0111] The incineration cavity 54 and the ploughing and burying cavity 31 are two open downward semi-closed cavities independent of each other, which is more conducive to the establishment of a negative pressure environment and facilitates the centralized treatment of smoke dust. In addition, since the suitable temperature of crop pests, diseases and weeds and their pathogens, insect eggs and grass seeds is mostly 20-30℃, high-temperature inhibition will occur at about 40℃, and inactivation will occur at about 100℃ for 1-2 minutes, and the higher the environmental temperature, the shorter the inactivation time. Therefore, the relatively small space of the incineration cavity can play a role in the incubation and inactivation of pests, diseases and weeds and their pathogens, insect eggs and grass seeds on the straw as well as on the ground surface and the shallow layer of the soil.

[0112] As shown in Figure 11 In order to ensure the sealing effect and extinguish open fires, the rear sealing device 514 is a retractable rolling sealing roller which is in rolling contact with the ground. The retractable rolling sealing roller can effectively improve the sealing effect of the incineration cavity 54, and the entire incineration cavity 54 is in a nearly sealed state, so that the incineration flame and the straw can be controlled to burn in the incineration cavity, thereby preventing the flame from overflowing. Meanwhile, during the movement of the machine, the retractable rolling sealing roller automatically performs ground profiling and maintains rolling contact with the ground, which can improve the sealing effect and effectively extinguish open fires and prevent fire from jumping. Example Four

[0113] As shown in Figure 10 In order to ensure the sealing effect and extinguish open fires, the rear sealing device 514 is a flexible fireproof curtain, and the bottom of the flexible fireproof curtain is laid on the ground. The flexible fireproof curtain can be a metal curtain or a fireproof curtain made of other materials. During the movement of the machine, the fireproof curtain is dragged on the ground, which can adapt to the ups and downs of the ground and achieve better effects of extinguishing open fires and sealing. Example Five

[0114] As shown in Figure 12 In order to improve the incineration effect, the incineration shell 51 is provided with a flame spraying head 52 which is installed in a spraying head installation chamber 56 extending to the periphery of the incineration shell 51, and the spraying head installation chamber 56 is sealingly connected with the incineration shell 51. Under the premise of maintaining the sealing effect of the incineration shell 51, the distance between the stretched flame spraying head and the straw is increased to realize outer flame incineration, thereby improving the incineration effect.

[0115] The various embodiments described in this specification are implemented in a progressive manner, each embodiment focusing on the differences from other embodiments, and the same or similar parts between embodiments can be mutually referred to. For the apparatus disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0116] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A straw rotary throwing and crushing in-situ burning and returning to field integrated machine, comprising a power assembly (1), a stubble cleaning assembly (2), a plowing and burying assembly (3), a frame (4), a burning assembly (5) and a flue gas treatment assembly (6); the power assembly (1) provides power for the stubble cleaning assembly (2), the plowing and burying assembly (3), the burning assembly (4) and the flue gas treatment assembly (5), respectively; the stubble cleaning assembly (2) and the plowing and burying assembly (3) are fixedly installed on the frame (4) from front to back at the same time; characterized in that: the stubble cleaning assembly (2) comprises a rotary drive roller (21) and a stubble cleaning part (22) arranged on the circumferential surface of the rotary drive roller; the stubble cleaning part (22) is a stubble cleaning hammer head hingedly installed on the circumferential surface of the rotary drive roller (21); the rotary drive roller (21) drives the stubble cleaning part (22) to throw straw upward from bottom to top along the forward direction of the machine; the burning assembly (5) comprises a burning shell (51) with an opening downward and semi-closed, and at least one group of flame nozzles (52); the stubble cleaning assembly (2) is located in the burning shell (51); the flame nozzles (52) are installed on the inner side of the burning shell (51); the straw crushed and thrown by the stubble cleaning assembly (2) passes through the flame area of the flame nozzles (52); the flue gas treatment assembly (6) comprises a negative pressure fan (61) for forming a negative pressure environment in the burning shell (51) and a flue gas treatment unit (62); the flue gas treatment unit (62) is communicated with the inside of the burning shell (51) through the pipeline (63) connected by the negative pressure fan (61).

2. The straw rotary-drawing and crushing machine according to claim 1, characterized in that: the burning shell (51) comprises a burning shell body (511), a front closing device (512) installed at the front end of the burning shell body (511), side plates (513) located on both sides of the burning shell body (511) and a rear closing device (514) installed at the rear end of the burning shell body (511); the front closing device (512), the rear closing device (514) and the side plates (513) on both sides of the burning shell body (511) are respectively attached to the ground.

3. The straw rotary-drawing and crushing machine according to claim 2, characterized in that: the side plates (513) on both sides of the burning shell body (511) are provided with plow plate structures (515); the plow plate structures (515) on both sides are plowed to both sides along the forward direction.

4. The straw rotary-diffusion crushing and in-situ incineration and field returning integrated machine according to claim 1 or 2, characterized in that: the stubble cleaning assembly (2) and the plowing and burying assembly (3) are located in the inside of the burning shell (51) at the same time.

5. The straw spin-throwing, crushing, and in-situ incineration and field returning integrated machine according to claim 4, characterized in that: the inside of the burning shell (51) is provided with a partition device (53); the partition device (53) is arranged along the longitudinal direction to separate the inside of the burning shell (51) into two independent opening downward semi-closed burning chambers (54) and plowing and burying chambers (31) from front to back, the stubble cleaning assembly (2) is located in the burning chamber (54); the plowing and burying assembly (3) is located in the plowing and burying chamber (31); the flue gas treatment unit (62) is communicated with the burning chamber (54) and the plowing and burying chamber (31) through the pipeline (63) connected by the negative pressure fan (61), respectively.

6. The straw spin-throwing, crushing, and in-situ incineration and field returning integrated machine according to claim 5, characterized in that: the partition device (53) is a retractable rolling sealing roller which keeps rolling contact with the ground.

7. The straw spin-throwing, crushing, and in-situ incineration and field returning integrated machine according to claim 5, characterized in that: the partition device (53) is a flexible fireproof curtain, the bottom of which is laid on the ground.

8. The straw rotary-drawing and crushing machine for in-situ incineration and field returning according to claim 2 or 3, characterized in that: The burning shell (51) is internally independently formed with an opening downward semi-closed burning cavity (54), The tillage and burying assembly (3) comprises a tillage and burying cavity (31) and a tillage and burying device (32), The stubble removing assembly (2) is located in the burning cavity (54), and the tillage and burying device (32) is located in the tillage and burying cavity (31). The flue gas treatment unit (62) is connected with the burning cavity (54) and the tillage and burying cavity (31) through the pipeline (63) connected with the negative pressure fan (61).

9. The straw spin-throwing, crushing, and in-situ incineration and field returning integrated machine according to claim 8, characterized in that: The rear sealing device (514) is a retractable rolling sealing roller which is in rolling contact with the ground.

10. The straw rotary-drawing and crushing machine according to claim 8, characterized in that it further comprises a straw-drying device. The rear sealing device (514) is a flexible fireproof curtain, and the bottom of the flexible fireproof curtain is laid on the ground.

11. The straw rotary-drawing and crushing machine according to claim 2, characterized in that it further comprises a straw-drying device. The stubble removing assembly (2) is located in the burning shell (51) and close to the front end of the burning shell body (511), forming an arc-shaped structure gradually expanding from the front to the rear cavity space. The cavity formed by the front end of the inner wall of the stubble removing assembly (2) and the front end of the stubble removing assembly (2) is a straw crushing cavity (541). The cavity expanding from the starting end to the area before the flame jetted out by the flame jet head (52) is a rotary throwing cavity (542). The cavity from the area where the flame jetted out by the flame jet head (52) to the tail of the burning shell (51) is a combustion cavity (543).

12. The straw spin-throwing, crushing, and in-situ incineration and field returning integrated machine according to claim 1, characterized in that: The tillage and burying assembly (3) is a rotary tillage machine structure which tills and buries from top to bottom along the forward direction of the whole machine.

13. The straw rotary-disk crushing and in-situ incineration machine according to claim 1, characterized in that: The burning assembly (5) comprises an earth-burning jet head (55) which is installed inside the burning shell (51) and located behind the stubble removing assembly (2), and the earth-burning jet head (55) faces the ground.

14. The straw rotary-disk crushing and in-situ incineration machine according to claim 1, characterized in that: The burning shell (51) is provided with a jet head mounting chamber (56) extending to the periphery of the burning shell (51) at the position where the flame jet head (52) is installed, and the jet head mounting chamber (56) is sealingly connected with the burning shell (51).

15. The straw rotary-diffusion crushing and in-situ incineration and field returning integrated machine according to claim 1 or 14, characterized in that: The jetting direction of the flame jet head (52) is non-perpendicular to the rotary direction of the straw.

16. The straw rotary-disk crushing and in-situ incineration machine of claim 15, wherein: The jetting direction of the flame jet head (52) is the same as or opposite to the rotary direction of the straw.

17. The straw rotary-disk crushing and in-situ incineration machine of claim 16, wherein: At least two groups of flame jet heads (52) are arranged in the burning shell (51).

18. The straw rotary-disk crushing and in-situ incineration machine according to claim 1, characterized in that: The burning shell (51) is provided with a fresh air system (7) at the front end, the fresh air system comprises a fan (71), a heat exchange device (72) and a fresh air preheating pipeline (73); the fan (71) is communicated with the inside of the burning shell (51) through the fresh air preheating pipeline (73), and the fresh air preheating pipeline (73) is non-contact heat exchanged with the flue gas treatment assembly (6) through the heat exchange device (72) before being communicated with the burning shell (51).

19. The straw rotary-disk crushing and in-situ incineration machine according to claim 1, characterized in that: The flue gas treatment assembly (6) comprises an ammonia water spraying device.

20. The straw rotary-disk crushing and in-situ incineration machine of claim 19, wherein: The waste liquid discharge port (64) of the ammonia water spraying device is located at the rear end of the tillage and burying assembly (3).

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