Ploughing integrated device for straw incineration and flue gas ash returning to field

Abstract

The invention relates to a ploughing integrated device for straw incineration and flue gas ash returning to the field, a feeding system is arranged on a rack, and a combustion chamber and an air blower which are communicated with each other are arranged at the tail end of a feeding machine; the ash treatment system is communicated with the bottom of the combustion chamber and comprises an ash lock and an ash discharge pipe which are sequentially connected from top to bottom, and the ash discharge pipe is provided with a vertical section and a horizontal section; the flue gas treatment system is close to the combustion chamber and arranged at the bottom of the feeding machine, and comprises a plurality of flue gas guide pipes communicated with the combustion chamber, and the tail ends of the flue gas guide pipes are all connected to a flue gas exhaust pipe; the smoke exhaust pipe is provided with a vertical section and a horizontal section, the horizontal section comprises a plurality of sections of adjustable smoke exhaust units, and smoke exhaust holes are formed in the pipe wall of each section of smoke exhaust unit; the plough share assembly is arranged below the rack and comprises a front plough and a rear plough, the front plough is used for ploughing soil to form a soil ditch, and the horizontal sections of the ash discharge pipe and the smoke discharge pipe extend into the soil ditch; and the rear plough is used for turning over soil to cover the horizontal sections of the ash discharge pipe and the smoke discharge pipe.

Description

Technical Field

[0001] The present invention belongs to the field of biomass treatment equipment, and particularly relates to a plowing integrated device for straw burning and returning flue gas ash and slag to the field. Background Art

[0002] Straw burning is a traditional method for straw treatment, which can kill eggs, pathogens, etc. on straw and the ground surface, and the generated ash and slag can be returned to the field locally, enabling the soil to obtain nutrient supplementation and improvement. Burning is a very effective resource recycling method. However, straw burning will generate a large amount of smoke and polluting gases, and the seasonal characteristics of crops make straw burning always concentrated in the short term, far exceeding the self-purification ability of the environment, causing serious short-term pollution to the atmospheric environment. Therefore, to solve the problem of straw burning, it is necessary to solve the emission pollution problems of flue gas and ash and slag.

[0003] Returning straw ash to the field is easy to achieve, but the treatment of flue gas is the most difficult. Due to incomplete combustion of straw, a large amount of tar and fly ash will be generated in the discharged flue gas, and nitrogen oxides and sulfur oxides will also be generated. Using filtration or electrostatic dust removal methods not only has high costs, but also can only remove tar and fly ash, and cannot remove nitrogen oxides and sulfur oxides, requiring the addition of nitrogen oxide and sulfur oxide treatment modules. Therefore, it is difficult to promote on a large scale. Since straw is widely distributed and scattered, unified recycling and treatment will increase the treatment cost. In addition, if straw cannot be burned and returned to the field locally, in addition to economic problems, there are also problems such as increased pests and diseases, increased pesticide usage, excessive soil air permeability, unfavorable heat preservation and moisture retention, and reduced agricultural production.

[0004] Existing methods for straw burning treatment include special incinerators, such as a straw incinerator with gas purification CN219797202U, which uses a fixed incinerator equipped with a flue gas filtration treatment device. There are also incinerators with a flue gas treatment device using liquid spraying, such as the straw incinerator provided by CN108613190A. There are also mobile incinerators, such as a fully automatic environmental protection straw incinerator provided by CN215062144U, which returns the straw ash to the field after extinguishing the fire. A further solution is to use the adsorption ability of straw itself to purify flue gas while returning the ash to the field, but still requires a flue gas treatment device, such as a smokeless straw incinerator provided by CN212511206U. Generally speaking, the core of the current straw burning treatment method is to treat flue gas and ash and slag. The flue gas treatment process requires a separate filtration device, and adsorption by consumables increases the cost; while the ash and slag are directly placed on the ground surface and then returned to the field during subsequent plowing, there are also risks of ash reignition and ash floating into the atmosphere, and due to the relatively small density of ash and slag such as straw ash, fly ash is also easily generated during field return. Therefore, a plowing integrated device for straw burning and returning flue gas ash and slag to the field is needed. Summary of the Invention

[0005] To solve the above problems existing in the prior art, the present invention provides a plowing integrated device for straw burning and returning of flue gas ash and slag. The technical problems to be solved by the present invention are realized through the following technical solutions:

[0006] The present invention provides a plowing integrated device for straw burning and returning of flue gas ash and slag, comprising: a frame, a feeding system, an ash slag treatment system, a flue gas treatment system and a plowshare assembly. Among them, moving wheels are arranged at the bottom of the frame; the feeding system is arranged on the frame, and straw is fed through a feeder. A combustion chamber and a blower are arranged at the end of the feeder, and the blower is communicated with the combustion chamber; the ash slag treatment system is communicated with the bottom of the combustion chamber. The ash slag treatment system includes an ash lock and an ash discharge pipe connected in sequence from top to bottom. The ash discharge pipe is provided with a vertical section and a horizontal section; the flue gas treatment system is arranged at the bottom of the feeder close to the combustion chamber; the flue gas treatment system includes a plurality of smoke guide pipes. The upper ends of the plurality of smoke guide pipes are communicated with the combustion chamber through the feeder, and the ends of the plurality of smoke guide pipes are all connected to a smoke exhaust pipe; the smoke exhaust pipe is provided with a vertical section and a horizontal section. The horizontal section includes a plurality of adjustable smoke exhaust units, and smoke exhaust holes are arranged on the pipe walls of each smoke exhaust unit; the plowshare assembly is arranged below the frame; the plowshare assembly includes a front plow and a rear plow. The front plow is used for plowing the soil to form a soil trench, and the horizontal sections of the ash discharge pipe and the smoke exhaust pipe both extend into the soil trench; the rear plow is used for turning over the soil to cover the horizontal sections of the ash discharge pipe and the smoke exhaust pipe.

[0007] In an embodiment of the present invention, a fuel tank installation area is further arranged on the frame for installing a fuel tank. The fuel tank is communicated with an ignition nozzle arranged in the combustion chamber through a pipeline.

[0008] In an embodiment of the present invention, the feeder includes a main feeder and an auxiliary feeder. The main feeder and the auxiliary feeder are arranged perpendicular to each other and are both used for feeding straw into the combustion chamber; a grate is arranged between the feeder and the combustion chamber. A scraper is arranged on one side of the grate close to the combustion chamber, and the scraper is coaxially connected to the transmission main shaft of the main feeder.

[0009] In an embodiment of the present invention, the ash slag treatment system includes an upper pressure valve, an ash lock, a lower pressure valve and an ash discharge pipe connected in sequence from top to bottom; the end of the horizontal section of the ash discharge pipe is an open structure, and the upper part of the open structure is longer than the lower part.

[0010] In an embodiment of the present invention, the ash slag treatment system further includes a pressure regulating valve. One end of the pressure regulating valve is connected to the combustion chamber or an external pressurized gas source through a pipeline, and the other end is connected to the ash lock through a pipeline.

[0011] In one embodiment of the present invention, the upper and lower parts of the ash lock are arranged as mating truncated cones, and the inner wall of the ash lock is a conical surface; a dust discharging assisting device is arranged in the ash lock, and the dust discharging assisting device includes: an upper connecting arm, a central shaft, a middle connecting arm, a stirring paddle and a dust discharging assisting paddle, wherein the upper connecting arm, the middle connecting arm, the stirring paddle and the dust discharging assisting paddle are arranged in sequence from top to bottom; the upper connecting arm is perpendicular to the conical surface of the inner wall of the ash lock; the upper connecting arm is rotationally connected to the central shaft; the middle connecting arm is fixedly connected to the central shaft; a driving motor is arranged outside the ash lock and is in transmission connection with the middle connecting arm; the stirring paddle and the dust discharging assisting paddle are both coaxially connected to the central shaft, and the stirring paddle and the dust discharging assisting paddle are both driven to rotate through the central shaft.

[0012] In one embodiment of the present invention, a flue gas pressure regulating valve is arranged on each of the smoke guide pipes, and the emission pressure of the flue gas generated by the straw combustion in the combustion chamber is adjusted through the flue gas pressure regulating valve.

[0013] In one embodiment of the present invention, multiple sections of the smoke exhaust units are connected by flanges or threads, and at least one smoke exhaust protection cover is arranged outside each section of the smoke exhaust unit. The smoke exhaust protection cover is in direct contact with the soil and is used to prevent the smoke exhaust holes on the pipe wall of the smoke exhaust unit from being blocked by the soil.

[0014] In one embodiment of the present invention, at least part of the smoke exhaust units are made of deformable flexible materials.

[0015] In one embodiment of the present invention, the plowing integrated device for straw burning and flue gas ash residue returning to the field further includes: a height adjuster, and the height adjuster includes an extension section and a connection section which are connected. The length of the extension section is adjustable; the vertical sections of the ash discharge pipe and the smoke exhaust pipe are both arranged as an upper section and a lower section which are slidably connected, and the upper section and the lower section are sealed with grease; the connection section is respectively connected to the lower sections of the vertical sections of the ash discharge pipe and the smoke exhaust pipe to adjust the ground clearance of the horizontal sections of the ash discharge pipe and the smoke exhaust pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The plowing integrated device for straw burning and flue gas ash returning to the field of the present invention synchronously introduces the flue gas and ash generated by straw burning into the plowed soil. The soil is utilized to adsorb pollutants such as tar, nitrogen oxides, and sulfur oxides in the flue gas. At the same time, the ash and part of the carbonized straw are buried underground to achieve returning to the field, which not only reduces air pollution but also improves soil fertility. It also helps to adsorb nitrogen oxides and sulfur oxides in the flue gas, and sterilizes the soil through the burning heat, reducing the amount of pests, diseases, and pesticide usage. The ash treatment system combined with the synchronous soil covering design of the plowshare component avoids the scattering and reignition of the ash. The flue gas treatment system realizes the segmented discharge of the flue gas through multiple sections of smoke exhaust units, and then realizes the segmented adsorption and purification through soil covering, reducing the treatment cost. At the same time, the integrated mobile structure is suitable for dispersed farmland operations, without additional consumables, realizing efficient resource recycling and environmental protection farming.

[0018] For the plowing integrated device for straw burning and flue gas ash returning to the field of the present invention, the combustion chamber is arranged at the end of the feeding machine, and pressurized combustion is carried out in cooperation with a blower. The smoke guide pipe is arranged before the feeding end of the combustion chamber. The flue gas generated by straw burning is first pressed into the straw at the tail of the feeding machine. The straw is heated by the high-temperature flue gas and part of the water vapor is carried away. At the same time, the temperature and pressure of the flue gas are reduced, and part of the combustion tar is adsorbed by the straw, reducing the tar content in the discharged flue gas. After the pressure is adjusted by the flue gas pressure regulating valve, it is collected in the smoke exhaust pipe and dispersed and discharged through the smoke exhaust holes on the smoke exhaust unit. The pollutants in the flue gas are absorbed by the soil.

[0019] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, details are described as follows. Brief Description of the Drawings

[0020] Figure 1 It is the front view of the structure of a plowing integrated device for straw burning and flue gas ash returning to the field provided by an embodiment of the present invention;

[0021] Figure 2 It is the side view of the structure of a plowing integrated device for straw burning and flue gas ash returning to the field provided by an embodiment of the present invention;

[0022] Figure 3 It is the partial enlarged view of part I of a plowing integrated device for straw burning and flue gas ash returning to the field provided by an embodiment of the present invention;

[0023] Figure 4 It is the structural schematic diagram of the smoke exhaust pipe provided by an embodiment of the present invention;

[0024] Figure 5 It is the structural schematic diagram of the smoke exhaust unit provided by an embodiment of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the smoke exhaust unit at the end provided by an embodiment of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the ash lock provided by an embodiment of the present invention.

[0027] Reference numerals: 100 - frame; 110 - moving wheel; 120 - fuel tank installation area; 200 - feeding system; 210 - combustion chamber; 211 - ignition nozzle; 220 - blower; 230 - main feeder; 240 - auxiliary feeder; 250 - grate; 300 - ash treatment system; 310 - ash lock; 3101 - upper connecting arm; 3102 - central axis; 3103 - middle connecting arm; 3104 - stirring paddle; 3105 - ash discharge assisting paddle; 320 - ash discharge pipe; 330 - upper pressure valve; 340 - lower pressure valve; 350 - pressurizing valve; 360 - driving motor; 400 - flue gas treatment system; 410 - smoke guiding pipe; 420 - smoke exhaust pipe; 421 - smoke exhaust unit; 4211 - tail pipe opening; 422 - smoke exhaust protective cover; 4221 - soil scraping blade; 430 - flue gas pressure regulating valve; 500 - plowshare assembly; 510 - front plow; 520 - rear plow; 600 - height regulator. Detailed implementation manners

[0028] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following provides a detailed description of a plowing and tilling integrated device for straw burning and flue gas and ash returning to the field according to the present invention in combination with the accompanying drawings and specific implementation manners.

[0029] The foregoing and other technical contents, features and effects of the present invention can be clearly presented in the following detailed description in conjunction with the accompanying drawings. Through the description of the specific implementation manners, a more in - depth and specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and illustration, and are not used to limit the technical solutions of the present invention.

[0030] Embodiment 1

[0031] The core of the current straw burning treatment method is to treat flue gas and ash. The main flue gas treatment methods include filtration, activated carbon adsorption, and liquid (usually water) washing. The main drawback of these methods is the need to use consumables, which increases the cost. The best way to handle ash is to return it to the field. However, if the ash is first placed on the ground and then returned to the field during plowing, there is a risk of ash reignition and ash floating into the atmosphere. Moreover, due to the relatively low density of ash such as plant ash, fly ash pollution is also likely to occur during the process of returning it to the field. In view of this, the present invention provides a plowing and tilling integrated device for straw burning and flue gas and ash returning to the field, asFigures 1 to 3 As shown Figure 1 is a front view of the structure of a plowing integrated device for straw burning and flue gas ash returning to the field provided by an embodiment of the present invention; Figure 2 is a side view of the structure of a plowing integrated device for straw burning and flue gas ash returning to the field provided by an embodiment of the present invention; Figure 3 is a partial enlarged view of part I of the plowing integrated device for straw burning and flue gas ash returning to the field provided by an embodiment of the present invention.

[0032] In this embodiment, the plowing integrated device for straw burning and flue gas ash returning to the field includes: a frame 100, a feeding system 200, an ash treatment system 300, a flue gas treatment system 400, and a plowshare assembly 500.

[0033] Specifically, a moving wheel 110 is provided at the bottom of the frame 100; the feeding system 200 is arranged on the frame 100, and straw is fed through a feeder. A combustion chamber 210 and a blower 220 are arranged at the end of the feeder. The blower 220 is connected to the combustion chamber 210, and pressurized air is sent into the combustion chamber 210 through the blower 220 to ensure the continuity of the combustion reaction. The ash treatment system 300 is connected to the bottom of the combustion chamber 210. The ash treatment system 300 includes an ash lock 310 and an ash discharge pipe 320 connected in sequence from top to bottom. The ash discharge pipe 320 is provided with a vertical section and a horizontal section; the flue gas treatment system 400 is arranged near the combustion chamber 210 at the bottom of the feeder; the plowshare assembly 500 is arranged below the frame 100.

[0034] Exemplarily, multiple pairs of moving wheels 110 can be arranged at the bottom of the frame 100. The moving wheels 110 can be non-powered wheels, and the frame 100 is towed by other towing vehicles to realize the traveling and soil turning operations; alternatively, at least one pair of powered wheels and corresponding power mechanisms (such as motors) can also be arranged. This embodiment does not limit this.

[0035] It should be noted that by setting the moving wheels 110, the plowing integrated device for straw burning and flue gas ash returning to the field in this embodiment has a certain traveling ability. By integrally arranging the feeding, combustion, and moving mechanisms on the frame 100, the actions of straw burning, flue gas and ash discharge and movement form an integrated action, thus realizing the integration of synchronous straw burning, plowing the soil, and flue gas and ash returning to the field. At the same time, the adoption of the integrated moving structure can also adapt to the scattered farmland operations, realizing efficient resource recycling and environmental protection farming.

[0036] Such as Figure 4 and Figure 5 shown Figure 4 is a schematic structural diagram of an exhaust pipe provided by an embodiment of the present invention; Figure 5 is a schematic structural diagram of an exhaust unit provided by an embodiment of the present invention.

[0037] Further, the flue gas treatment system 400 includes a plurality of flue gas pipes 410. The upper ends of the plurality of flue gas pipes 410 are connected to the combustion chamber 210 through a feeder, and the ends of the plurality of flue gas pipes 410 are all connected to the exhaust pipe 420. The exhaust pipe 420 is provided with a vertical section and a horizontal section. The horizontal section includes a plurality of adjustable exhaust units 421, and exhaust holes are provided on the pipe walls of each exhaust unit 421.

[0038] Exemplarily, as the length of the exhaust pipe 420 increases, the diameter of the exhaust unit 421 decreases appropriately. Among them, the exhaust pipe 420 is provided with an equal-diameter connection section and a variable-diameter connection section. The exhaust units 421 in the equal-diameter connection section have the same diameter and are used to adjust the length of the exhaust pipe 420. The exhaust units 421 in the variable-diameter connection section are used to connect the equal-diameter connection section after the diameter becomes smaller, and the exhaust units 421 in the equal-diameter connection section are finally connected to the end tail pipe.

[0039] Exemplarily, the exhaust units 421 are connected by flanges or threads, and a sealing gasket is provided at the connection to ensure that the flue gas does not leak.

[0040] Furthermore, a flue gas pressure regulating valve 430 is provided on each flue gas pipe 410, and the discharge pressure of the flue gas generated by the straw combustion in the combustion chamber 210 is adjusted through the flue gas pressure regulating valve 430.

[0041] Exemplarily, the flue gas pressure regulating valve 430 changes the flow area of the flue gas by adjusting the opening degree of the valve, thereby controlling the pressure and flow rate of the flue gas. It can be manually controlled, such as manually adjusting the actuator to change the opening degree of the valve; or automatically controlled, such as automatically adjusting through sensors and controllers.

[0042] The principle is that in this embodiment, the combustion chamber 210 is arranged at the end of the feeder, and the blower 220 is used to pressurize the intake air for combustion. The flue gas pipes 410 are arranged before the feeding end of the combustion chamber 210. The flue gas generated by the straw combustion is first pressed into the straw at the tail of the feeder. The high-temperature flue gas heats the straw and takes away part of the water vapor, while reducing the temperature and pressure of the flue gas, and adsorbing part of the combustion tar by the straw. The adsorbed combustion tar is decomposed again during the subsequent combustion process, and finally the tar content in the discharged flue gas is reduced. After the pressure is adjusted by the flue gas pressure regulating valve 430, it is collected in the exhaust pipe 420 and discharged dispersedly through the exhaust holes provided on each exhaust unit 421. The water vapor and pollutants in the flue gas, such as tar, sulfur oxide toxic and harmful gases, part of carbon dioxide and water vapor, are absorbed by the soil. Through this pressurized combustion method, wet straw with high water content can be treated.

[0043] Such as Figure 1As shown, in an alternative embodiment, to reduce the emission pollution of flue gas and ash residue and ensure the soil covering and absorption efficiency, a plowshare assembly 500 is provided below the frame 100 in this embodiment. The plowshare assembly 500 includes a front plow 510 and a rear plow 520. The front plow 510 is used to plow the soil to form a soil trench, and the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 both extend into the soil trench. The ash discharge pipe 320 is arranged above the smoke exhaust pipe 420, so that the flue gas can fully contact with the ash residue, which is beneficial to the adsorption of the flue gas. The rear plow 520 is used to turn over the soil to cover the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420.

[0044] Exemplarily, both the front plow 510 and the rear plow 520 are of the structure of soil-turning plows. The front plow 510 can penetrate into the soil and turn it up to form a soil trench, and the rear plow 520 can turn up the soil and cover it on the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420. The ash residue is deeply buried and the soil is compacted by the rear plow 520 to isolate oxygen and prevent re-ignition.

[0045] Further, on the premise of meeting the traction power requirements, and correspondingly increasing the power of the feeding system 200, multiple sets of the ash discharge pipe 320, the smoke exhaust pipe 420 and the soil-turning plows can be arranged in parallel. Among them, the numbers of the ash discharge pipe 320 and the smoke exhaust pipe 420 can be set to be the same, and the number of the soil-turning plows is one more than the number of the ash discharge pipe 320 or the smoke exhaust pipe 420, that is, each set of the ash discharge pipe 320 or the smoke exhaust pipe 420 always has a corresponding front plow 510 and rear plow 520, so that the scale of straw treatment can be expanded.

[0046] The principle is that the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 extend into the soil trench plowed by the front plow 510, and then are covered by the soil turned over by the rear plow 520, so as to bury the flue gas and ash residue underground. Specifically, the ash residue generated by straw burning is discharged into the soil by the ash discharge pipe 320 extending into the soil, and no fly ash is generated, and the ash residue is returned to the field. The flue gas generated by straw burning is also introduced into the surface soil by the smoke exhaust pipe 420. Pollutants and greenhouse gases such as tar, fly ash, nitrogen oxides, sulfur oxides and part of carbon dioxide in the flue gas, as well as the water vapor generated by combustion, are absorbed in a physical adsorption or chemical adsorption manner under the combined action of the pores and moisture in the soil. Since the ash residue is simultaneously discharged into the soil, the ash residue contains alkaline substances such as potassium carbonate and sodium carbonate and part of carbonized straw residues, which not only have a certain sterilization effect, but also can react with or adsorb sulfur oxides and nitrogen oxides, so as to be converted into fertilizers such as potassium fertilizer, nitrogen fertilizer and carbon fertilizer. In addition, the heat generated by the straw is passed into the ground through the ash discharge pipe 320 and the smoke exhaust pipe 420 extending into the surface soil, which can also play a role in sterilizing the soil.

[0047] As Figure 1As shown, in an optional embodiment, a fuel tank installation area 120 is provided on the rack 100 for installing a fuel tank, and the fuel tank is connected to the ignition nozzle 211 disposed in the combustion chamber 210 through a pipeline.

[0048] Exemplarily, the fuel tank can be a liquefied petroleum gas tank, and the liquefied petroleum gas tank is connected to the ignition nozzle 211 of the combustion chamber 210 through a hose. As Figure 1 As shown, in an optional embodiment, the feeder includes a main feeder 230 and an auxiliary feeder 240. The main feeder 230 and the auxiliary feeder 240 are perpendicularly arranged, and both the main feeder 230 and the auxiliary feeder 240 are driven by motors to send straw into the combustion chamber 210.

[0049] Exemplarily, the main feeder 230 and the auxiliary feeder 240 form a dual-feeding system. The main feeder 230 and the auxiliary feeder 240 are perpendicularly installed on the same rack 100 and are respectively equipped with independent driving devices, such as motors; the main feeder 230 and the auxiliary feeder 240 share a feeding hopper. Straw enters from the upper feeding hopper and moves downward under the drive of the auxiliary feeder 240, and at the same time is transported horizontally into the combustion chamber 210 under the drive of the main feeder 230. Further, the main feeder 230 and the auxiliary feeder 240 can operate synchronously to evenly transport the straw into the combustion chamber 210 at the end, improving the feeding and processing capacity of the straw; the main feeder 230 and the auxiliary feeder 240 can also operate alternately, that is, when one feeder is working, the other feeder stops or is maintained, improving the continuous operation time and working efficiency.

[0050] It can be understood that for the convenience of schematic illustration, Figure 1 the feeder shown is drawn in the structural form of a screw feeder, which is only a preferred example, but the core of the present invention is not the structural composition of the feeder. Therefore, the form of the feeder is not limited to the screw feeder, and other feeders can also perform the feeding task of the present invention as long as they can match combustion and flue gas treatment. Exemplarily, the main feeder 230 is a screw conveyor, and the auxiliary feeder 240 is the discharging part of a belt conveyor, a straw collector or a straw shearing machine. The main feeder 230 and the auxiliary feeder 240 cooperate with each other to evenly send the straw into the combustion chamber 210.

[0051] In an optional embodiment, the ash handling system 300 includes an upper pressure valve 330, an ash lock 310, a lower pressure valve 340 and an ash discharge pipe 320 connected in sequence from top to bottom. Through the upper pressure valve 330 and the lower pressure valve 340, the ash amount and pressure in the ash lock 310 can be controlled. By adjusting the pressure in the ash lock 310, the ash can be smoothly discharged from the ash lock 310 under high pressure and enter the ash discharge pipe 320.

[0052] Exemplarily, a funnel-shaped ash hopper is provided at the bottom of the combustion chamber 210, and is connected to the ash handling system 300 through the ash hopper.

[0053] It should be noted that the ash lock 310 is a pressure device that operates cyclically. It realizes intermittent switching through the upper pressure valve 330 and the lower pressure valve 340, thereby ensuring the pressure stability in the combustion chamber 210, preventing sudden pressure drops, and preventing flue gas leakage. Specifically, by controlling the upper pressure valve 330 and the lower pressure valve 340 respectively through program control or pressure control, the ash lock 310 in the ash handling system 300 can operate intermittently, that is, it is divided into three stages: ash collection, ash discharge, and pressurization, and the three stages can be cycled.

[0054] In an alternative embodiment, the end of the horizontal section of the ash discharge pipe 320 is an open structure, and the upper part of the open structure is longer than the lower part, where the upper part is the end far from the ground and the lower part is the end close to the ground, so that the part where the upper part is longer than the lower part forms a cavity, which facilitates the discharge of ash and slag and prevents blockage by soil.

[0055] Such as Figure 4 and Figure 5 As shown, in an alternative embodiment, when the pipe diameter of the smoke exhaust pipe 420 remains unchanged, in order to ensure that the flue gas can be fully adsorbed by the soil, it is necessary to adjust the length of the smoke exhaust pipe 420 according to the moisture, composition, etc. of the soil to ensure that the flue gas is discharged through a sufficiently long smoke exhaust pipe 420. Therefore, the horizontal section of the smoke exhaust pipe 420 is set as an adjustable multi-section smoke exhaust unit 421 to facilitate increase or decrease.

[0056] Exemplarily, there are multiple smoke exhaust holes around the pipe section of each smoke exhaust unit 421, and flanges are respectively installed at both ends of each smoke exhaust unit 421, and multiple smoke exhaust units 421 are connected through bolt holes and bolts.

[0057] Exemplarily, the smoke exhaust pipe 420 is provided with an equal-diameter connection section and a variable-diameter connection section, and the vertical section and the horizontal section of the smoke exhaust pipe 420 are connected through a pipe elbow.

[0058] Specifically, a variable-diameter connection section is provided between the pipe elbow and the horizontal section of the smoke exhaust pipe 420. The horizontal section of the smoke exhaust pipe 420 extends into the soil. First, the multiple smoke exhaust units 421 are connected through flanges, and then the connected multiple smoke exhaust units 421 are connected to the variable-diameter connection section, that is, the diameter matching between the smoke exhaust units 421 is realized through the variable-diameter connection section. When variable diameter is required, after adjusting the diameter of the variable-diameter connection section to complete the variable diameter, a certain number of multi-section smoke exhaust units 421 with the same diameter are connected, and finally the end tail pipe is connected.

[0059] Such as Figure 6 As shown, Figure 6It is a schematic structural diagram of the smoke exhaust unit at the end provided by an embodiment of the present invention.

[0060] Further, the tail pipe at the end is provided with a tail pipe opening 4211, and the tail pipe opening 4211 is set as an opening structure with a longer upper part and a shorter lower part, so that the covering soil is not easily introduced into the smoke exhaust pipe 420, while the flue gas can be discharged normally.

[0061] Exemplarily, each section of the smoke exhaust unit 421 can be made of metal, engineering plastic or rubber.

[0062] Still further, at least part of the smoke exhaust units 421 are made of deformable flexible materials, such as rubber, to ensure that the overall smoke exhaust pipe 420 has sufficient deformation ability.

[0063] The principle is that when all the smoke exhaust units 421 are made of hard materials, when the ground is uneven, some of the smoke exhaust units 421 may be higher than the ground, resulting in the direct discharge of flue gas into the air. Therefore, to ensure that the smoke exhaust pipe 420 has a certain deformation ability, a certain number of smoke exhaust units 421 made of flexible materials are used, so that all the smoke exhaust units 421 can be kept covered by the covering soil, and when turning during travel, the smoke exhaust pipe 420 can still have sufficient deformation.

[0064] In an alternative embodiment, at least one smoke exhaust protection cover 422 is provided outside each section of the smoke exhaust unit 421. The smoke exhaust protection cover 422 is set in a flared shape, that is, one end of the smoke exhaust protection cover 422 is connected to the smoke exhaust unit 421, and the other end of the smoke exhaust protection cover 422 is far from the connection position and the diameter gradually increases.

[0065] Exemplarily, the smoke exhaust protection cover 422 can be set in a mesh or honeycomb structure, which can not only ensure the smooth discharge of flue gas, but also effectively block external objects.

[0066] Exemplarily, the smoke exhaust protection cover 422 can adopt a stainless steel mesh structure, which has the characteristics of high temperature resistance and corrosion resistance.

[0067] The principle is that during the flue gas discharge process, the smoke exhaust holes of the smoke exhaust pipe 420 are usually located in the soil. The high-temperature flue gas in the smoke exhaust pipe 420 is discharged through the smoke exhaust holes on the pipe wall. If directly exposed to the soil, the smoke exhaust holes are easily blocked by soil, dust, sundries, etc. Through the smoke exhaust protection cover 4212, the direct contact between the smoke exhaust holes and the soil can be avoided, and the smoke exhaust holes on the pipe wall of the smoke exhaust unit 421 can be effectively prevented from being blocked by soil, while a small amount of soil can be broken through by the pressure of the flue gas to ensure the continuous operation of the smoke exhaust pipe 420. In other words, the smoke exhaust protection cover 420 can protect the smoke exhaust holes on the pipe wall of the smoke exhaust unit 421, prevent external substances from entering the smoke exhaust pipe 420, and ensure the smooth discharge of flue gas at the same time.

[0068] Furthermore, there are a total of 3 soil-scraping blades 4221 provided on the smoke exhaust protection cover 422 at the upper part directly above and the two upper inclined sides (about 45°) of the protection cover, which are used to destroy the cavity left by the smoke exhaust pipe 420 after passing through the soil cover. If a complete cavity exists for too long, it will be unfavorable for soil renewal, and further affect the absorption of flue gas. By using the soil-scraping blades 4221 to cut the cavity left by the movement of the smoke exhaust pipe 420, part of the soil moves, thus renewing the soil and being beneficial to flue gas absorption.

[0069] In addition, by adjusting the setting angle of the soil-scraping blades 4221, for example, the root of the soil-scraping blades 4221 on both sides forms an obtuse angle with the traveling direction of the smoke exhaust pipe 420, so that there is a downward force when the soil-scraping blades 4221 are traveling, preventing the smoke exhaust pipe 420 from floating out of the ground during the towing process.

[0070] As Figure 1 shown, in an alternative embodiment, the vertical sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 are both provided with an upper section and a lower section that are slidably connected, and are sealed with grease between the upper section and the lower section, so that the lengths of the vertical sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 are both adjustable, and further the ground clearance of the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 is also adjustable.

[0071] Furthermore, the plowing integrated device for straw burning and flue gas and ash residue returning to the field in this embodiment further includes: a height adjuster 600. The height adjuster 600 includes an extension section and a connection section connected to each other. The length of the extension section is adjustable, and the connection section is respectively connected to the lower sections of the vertical sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 to adjust the ground clearance of the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420.

[0072] Exemplarily, the height adjuster 600 is of an inverted T-shaped structure. Its extension section is vertically installed below the frame 100. The extension section can adopt a hydraulic rod, and its length is adjusted through a hydraulic control system. The lower connection section is a horizontal connecting pipe or a horizontal connecting plate, and is respectively fixed to the lower sections of the vertical sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 through connecting parts. When the hydraulic rod extends or contracts, the lower sections of the vertical sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 also move up and down accordingly, so as to be able to adjust the ground distance of the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420.

[0073] It should be noted that the plowing integrated device for straw burning and flue gas ash residue returning to the field in this embodiment can meet the emission standards through flue gas soil covering. The principle lies in that, firstly, soil, as a porous medium composed of mineral particles, organic matter, microorganisms and pores, has a significant adsorption and transformation effect on pollutants in flue gas. When the flue gas passes through the soil covering, the soot particles in it (such as PM2.5, PM10) can be adsorbed and fixed by the clay minerals and organic colloids on the soil surface layer, which mainly benefits from the layered structure and high specific surface area of clay particles. At the same time, the water-soluble gases in the flue gas will condense when encountering cold in the soil pores, form dissolved substances and infiltrate into the deep soil with the water. Secondly, the humus in the soil contains active functional groups such as carboxyl groups and phenolic hydroxyl groups, which can fix heavy metals and organic pollutants in the flue gas through chelation, reducing their mobility. Due to the negatively charged surface of clay minerals, they can adsorb nutrients such as ammonium roots and potassium ions in the flue gas, realizing the storage and gradual release of nutrients. In addition, the carbonates in the straw ash can neutralize the acidic components in the flue gas, generating stable compounds, thus alleviating the impact of soil acidification. Finally, the microbial system in the soil also has an important metabolic transformation function for flue gas pollutants. Aerobic bacteria and fungi can both decompose organic pollutants in the flue gas and convert them into carbon dioxide and water; anaerobic bacteria can denitrify nitrates into nitrogen gas, reducing the accumulation of nitrogen oxides; enzymes such as catalase and dehydrogenase in the soil can catalyze the oxidation and decomposition of polycyclic aromatic hydrocarbons, reducing their toxicity. Therefore, through the synergistic effect of physical interception, chemical fixation and biodegradation of the soil, the pollutants in the flue gas are effectively adsorbed, fixed and transformed, which can significantly reduce the concentration and activity of particulate matter, acidic gases, heavy metals and organic pollutants in the flue gas, and finally achieve up-to-standard emissions.

[0074] The plowing integrated device for straw burning and flue gas ash residue returning to the field of the present invention synchronously introduces the flue gas and ash residue generated by straw burning into the plowed soil. The soil is used to adsorb pollutants such as tar, nitrogen oxides and sulfur oxides in the flue gas. At the same time, the ash residue and part of the carbonized straw are buried underground to achieve returning to the field, which not only reduces air pollution but also improves soil fertility. It also helps to adsorb nitrogen oxides and sulfur oxides in the flue gas, sterilize the soil through the burning heat, and reduce the amount of pests, diseases and pesticides used. The ash residue treatment system combined with the synchronous soil covering design of the plowshare component avoids the scattering and reignition of ashes. The flue gas treatment system realizes the segmented emission of flue gas through multiple sections of smoke exhaust units, and then realizes the segmented adsorption and purification through soil covering, reducing the treatment cost. At the same time, the integrated mobile structure is suitable for scattered farmland operations, without additional consumables, and realizes efficient resource recycling and environmental protection farming.

[0075] Embodiment 2

[0076] As Figure 1 、 Figure 3 and Figure 7 shown, Figure 7It is a schematic structural diagram of the ash lock provided by the embodiment of the present invention.

[0077] As Figure 3 shown, in an optional embodiment, a grate 250 is provided between the feeder and the combustion chamber 210. A scraper is provided on one side of the grate 250 close to the combustion chamber 210. The scraper is coaxially connected to the transmission main shaft of the main feeder 230 and rotates synchronously with the transmission main shaft of the main feeder 230. Through the scraper, partially carbonized straw can be scraped off, preventing further combustion of the straw, thereby retaining more organic matter, making the fertility stronger after returning to the field, and at the same time reducing the generation amount of flue gas and lowering the capacity requirement of the flue gas treatment system.

[0078] Specifically, there are significant differences in the treatment capabilities of different soils for straw burning ash residues. For soils with heavy texture, low microbial content, and weak buffering capacity (such as acidified soils), it is necessary to ensure that the straw burns fully to form fine-grained ash residues, so as to utilize the alkaline substances such as potassium carbonate and sodium carbonate in the ash residues to counteract the acidity of the soil. At the same time, the remaining organic matter in the residues is also beneficial to improving the soil structure and supplementing organic matter. For soils with high water content, high temperature, and high microbial content, their decomposition ability of organic matter is strong. The unburned straw can be scraped off by the scraper. By retaining part of the unburned straw, the soil organic matter can be effectively supplemented. Also, because the buffering capacity of such soils for ash residues is strong, moderate residue will not significantly affect the soil permeability. However, the unburned straw has a certain length and a large overall particle size, which is easy to form an ash bridging phenomenon inside the ash lock 310, resulting in the ash residues not being able to fall smoothly, and even affecting the normal operation of the ash residue treatment system 300.

[0079] Therefore, in the plowing and tilling integrated device for straw burning and flue gas ash residue returning to the field of this embodiment, an ash discharging assisting device is provided in the ash lock 310. By the mutual cooperation of the ash discharging assisting device and the scraper in the combustion chamber, full combustion or partial combustion can be achieved, and different combustion methods can be adopted under different climatic or soil conditions, making the straw treatment more matched with the soil nutrients.

[0080] In this embodiment, the upper and lower parts of the ash lock 310 are arranged as mating frustum cones, which are connected by a flange, facilitating the assembly and maintenance of the inner components of the rear ash lock. The inner wall of the ash lock 310 is a conical surface; an ash discharging assisting device is arranged inside the ash lock 310. The ash discharging assisting device includes: an upper connecting arm 3101, a middle shaft 3102, a middle connecting arm 3103, a stirring paddle 3104 and an ash discharging assisting paddle 3105. Among them, the upper connecting arm 3101, the middle connecting arm 3103, the stirring paddle 3104 and the ash discharging assisting paddle 3105 are arranged in sequence from top to bottom; the upper connecting arm 3101 is perpendicular to the conical surface of the inner wall of the ash lock 310; the upper connecting arm 3101 is rotatably connected to the middle shaft 3102; the middle connecting arm 3103 is fixedly connected to the middle shaft 3102; the driving motor 360 is arranged outside the ash lock 310 and is in transmission connection with the middle connecting arm 3103; the stirring paddle 3104 and the ash discharging assisting paddle 3105 are both coaxially connected to the middle shaft 3102, and the stirring paddle 3104 and the ash discharging assisting paddle 3105 are both driven to rotate by the middle shaft 3102.

[0081] Specifically, the ash lock 310 is composed of two frustum-shaped structures, the two frustum-shaped structures are mated through a middle annular flange and fixed by screws to facilitate inspection, repair and maintenance. An opening is provided at each of the upper and lower ends of the ash lock 310. Among them, the upper end is the ash inlet, and the lower end is the ash outlet. The ash is connected to the ash bin outlet of the combustion chamber 210 through the upper pressure valve 330 by a flange, and the ash outlet is connected to the ash discharging pipe 320 through the lower pressure valve 340. The inner wall of the ash lock 310 adopts a conical surface structure with a large inclination angle, which is beneficial to discharging ash, but the ash bridging phenomenon of plant ash easily leads to unsmooth ash discharging. Therefore, an ash discharging assisting device is also arranged inside the ash lock 310.

[0082] Exemplarily, a plurality of upper connecting arms 3101 are provided, and the plurality of upper connecting arms 3101 are respectively fixedly connected to the inner wall of the ash lock 310 to fix the ash discharging assisting device and improve the structural strength of the inner wall of the ash lock 310.

[0083] Further, the upper connecting arm 3101 is arranged with a downward inclination angle and is perpendicular to the inner wall of the ash lock 310, which is beneficial to ash discharging.

[0084] Exemplarily, the upper connecting arm 3101 and the middle shaft 3102 are connected by a bearing, so that the middle shaft 3102 can rotate.

[0085] Exemplarily, the middle connecting arm 3103 and the middle shaft 3102 are connected by bolts and fixed by spot welding. The annular support platform is fixed in the middle of the ash lock 310, and the middle connecting arm 3103 is arranged on the annular support platform and can rotate relative to the annular support platform.

[0086] Further, a transmission gear is provided on the annular platform, and an annular tooth meshing with the gear is provided on the middle connecting arm 3103. The transmission gear is externally connected to a driving motor 360 through a gear shaft outside the ash lock. Specifically, the driving motor 360 can be driven by a power gear or a pulley, and the driving motor 360 provides rotational power for the middle shaft 3102 of the ash assisting device.

[0087] In an alternative embodiment, at least a pair of symmetrically distributed stirring paddles 3104 are provided at a position higher than the upper connecting arm 3101 of the ash assisting device. The stirring paddles 3104 are fixed to the middle shaft 3102 and rotate with the middle shaft 3102 to ensure that ash slag does not form an ash bridge at the position of the upper connecting arm 3101.

[0088] Similarly, an ash discharging assisting paddle 3105 is provided below the middle connecting arm 3103 of the ash assisting device. The ash discharging assisting paddle 3105 is fixed to the middle shaft 3102 and rotates with the middle shaft 3102 to push the ash slag out of the ash lock 310.

[0089] It can be understood that the structure of the ash discharging assisting paddle 3105 can be set to be the same as that of the feeding screw paddle of the screw feeder, so it will not be elaborated here.

[0090] Further, a pressurized gas inlet is provided in the upper ash lock of the ash lock 310. The pressurized gas inlet is connected to the combustion chamber or the outlet of the blower. In the later stage of ash discharging of the ash lock 310, gas can be introduced into the interior of the ash lock 310 to increase the pressure inside the ash lock 310 through pressurized ventilation, ensuring that the ash lock 310 discharges ash cleanly.

[0091] Specifically, the ash slag treatment system 300 further includes a pressure regulating valve 350. One end of the pressure regulating valve 350 is connected to the combustion chamber 210 or an external pressurized gas source through a pipeline, and the other end is connected to the ash lock 310 through a pipeline. When it is necessary to press the ash lock 310, the pressure regulating valve 350 is opened to introduce the combustion chamber 210 or external pressurized gas into the ash lock 310, so that the pressure inside the ash lock 310 gradually increases until it reaches the set pressure value (usually matching the pressure inside the combustion chamber 210) and then it is closed.

[0092] Exemplarily, the pressure regulating valve 350 is connected to an external independent air pump as a backup pressurized source.

[0093] Exemplarily, the pressure regulating valve 350 is controlled by manually operating a switch. This control method is applicable to small equipment or occasions with low requirements for automation; it can also be automatically controlled by a PLC (Programmable Logic Controller) or other automation control systems according to the pressure and ash volume inside the ash lock 310 to open and close the pressure regulating valve 350; in addition, a pressure sensor can be installed inside the ash lock 310 to automatically close the pressure regulating valve 350 when the pressure reaches the set value and automatically open the pressure regulating valve 350 when the pressure is lower than the set value to achieve precise pressure control.

[0094] It should be noted that the use of the pressure valve 350 can achieve continuous collection and discharge of ash and slag, improving the operating efficiency of the entire ash and slag treatment system 300. Specifically, the pressure valve 350 is connected to the combustion chamber 210. By pressurizing through the pressure valve 350, pressurized gas can be introduced into the ash lock 310, causing the pressure inside the ash lock 310 to gradually increase. Under the action of the pressurized gas, the ash and slag are quickly discharged from the ash lock 310, preventing ash from accumulating or blocking the ash discharge pipe 320 inside the ash lock 310; through pressurization, it can also prevent ash and slag from leaking during the ash discharge process, reducing environmental pollution.

[0095] Embodiment III

[0096] As Figures 1 to 6 shown, the working process of the plowing integrated device for straw burning and flue gas ash and slag returning to the field in this embodiment is specifically described as follows:

[0097] Feeding and combustion process: Crop straw is collected and fed into the feeding hopper of the feeding system 200. The auxiliary feeder 240 and the main feeder 230 send the straw to the end of the feeder under the drive of the motor. A grate 250 is arranged between the feeder and the combustion chamber 210. The fuel sent from the liquefied petroleum gas tank is ignited in the ignition nozzle 211 of the combustion chamber 210, further igniting the straw at the end of the feeder. The air required for straw combustion is sent in through the compressed air inlet pipe by the blower 220 installed on the frame 100. The ash and slag from straw combustion are scraped off and fall to the bottom of the combustion chamber 210, and enter the ash lock 310 through the upper pressure valve 330.

[0098] Operation process of the ash lock 310: The operation of the ash lock 310 is divided into three stages: ash collection, ash discharge, and pressurization. The three stages are cycled and carried out at intervals, controlled by a program or manually. For example, when the pressure inside the ash lock 310 reaches the set threshold, the PLC closes the upper pressure valve 330 and opens the lower pressure valve 340. That is, the ash collection stage continues until the ash quantity inside the ash lock 310 reaches the set value, and then enters the ash discharge stage. The ash discharge stage continues until the pressure inside the ash lock 310 reaches atmospheric pressure, and finally enters the pressurization stage. The pressurization stage continues until the pressure inside the ash lock 310 is the same as the pressure inside the combustion chamber 210.

[0099] Specifically, during the ash collection stage: In the initial state, the ash lock 310 is in the ash collection stage. During this stage, the upper pressure valve 330 is opened, and the lower pressure valve 340 is closed. The ash and slag fall into the ash hopper at the bottom of the combustion chamber 210 and then enter the ash lock 310 through the upper pressure valve 330. During the ash discharge stage: When the ash quantity in the ash lock 310 reaches the upper limit of the material level, the ash lock 310 enters the ash discharge stage. The upper pressure valve 330 is closed, and the lower pressure valve 340 is opened. Since the pressure in the ash lock 310 is greater than the external pressure, the air pressure sends the ash and slag into the ash discharge pipe 320 and then discharges them through the opening at the tail of the ash discharge pipe 320. During the pressure charging stage: When the pressure in the ash lock 310 reaches atmospheric pressure, the ash discharge ends, and the ash lock 310 enters the pressure charging stage. At this time, both the upper pressure valve 330 and the lower pressure valve 340 are closed, and the ash and slag are collected at the bottom of the combustion chamber 210. The pressure charging valve 350 is opened, and gas is filled into the ash lock 310 from the combustion chamber 210 to gradually increase the pressure in the ash lock 310. When the pressure in the ash lock 310 is the same as the pressure in the combustion chamber 210, the pressure charging valve 350 is closed, and the upper pressure valve 330 is opened, and it re-enters the ash collection stage.

[0100] Process of returning ash and slag to the field: There are two or more plowshares installed in front and behind under the frame 100. When moving forward, the front plow 510 plows the soil to form a soil trench. The horizontal section of the ash discharge pipe 320 extends into the soil trench. The rear plow 520 turns over the soil to cover the horizontal sections of the ash discharge pipe 320 and the smoke exhaust pipe 420. When the air pressure blows the ash and slag out of the ash discharge pipe 320, it can only enter the gaps left by the movement of the ash discharge pipe 320. Since the ash discharge pipe 320 is moving, the discharged ash and slag are dispersed and discharged.

[0101] Flue gas treatment process: Flue gas generated when straw is burned is first pressed into the straw at the tail of the feeder. The high-temperature flue gas heats the straw and takes away some moisture, making the later combustion easier and reducing the temperature of the flue gas. Part of the tar is adsorbed by the straw, and the tar is further carbonized in the subsequent combustion, reducing the tar content in the flue gas and further reducing the pressure of the flue gas. The flue gas outlet opened at the tail of the flue gas feeder is discharged to the smoke guide pipe 410, and the pressure is adjusted by the flue gas pressure regulating valve 430 before entering the exhaust pipe 420. The exhaust pipe 420 is divided into a vertical section and a horizontal section. The horizontal section extends into the soil ditch. The rear plow 520 turns over the soil to bury the horizontal section of the exhaust pipe 420, and the flue gas is dispersed and discharged through the exhaust holes on the horizontal section of the exhaust pipe 420. Since the horizontal section of the exhaust pipe 420 is buried in the soil, the flue gas first contacts the soil, and the nitrogen oxides, sulfur oxides, tar, fly ash, etc. in the flue gas are absorbed by the soil, so that the flue gas is purified. Due to the difference in the amount of smoke, the length of the horizontal section of the smoke exhaust pipe 420 is designed to be easy to connect. The smoke exhaust units 421 are connected in sequence according to the relative amount of straw, the depth of soil turning and the soil moisture, so as to adjust the length of the smoke exhaust pipe 420 so that the pollutants in the smoke are absorbed by the soil. In order to prevent the smoke exhaust hole from being blocked by the soil, a smoke exhaust protective cover is added to each section of the smoke exhaust pipe 420. The smoke exhaust protective cover is in direct contact with the soil, so that the smoke exhaust hole can be prevented from being blocked. A small amount of soil can also be broken by the pressure of the smoke, ensuring the continuous operation of the smoke treatment system 400.

[0102] The overall working mode of the integrated plowing device for straw burning and returning flue gas and ash to the field in this embodiment: the working modes of the ash treatment system 300 and the flue gas treatment system 400 are divided into normal operating mode and non-operating mode (docked mode). The ash returning process and the flue gas treatment process illustrate the normal operating mode. When the device is not working, the ash treatment system 300 and the flue gas treatment system 400 also enter the non-operating mode. When in the non-operating mode, the height adjuster 600 is used to adjust the distance from the ground of the horizontal section of the ash discharge pipe 320 and the smoke exhaust pipe 420. The vertical sections of the ash discharge pipe 320 and the smoke exhaust pipe 420 are divided into two sections. The inner diameter of the upper section matches the outer diameter of the lower section, and high-temperature sealing grease is applied in the gap between the upper section and the lower section. The high-temperature sealing grease can provide lubrication during the adjustment operation and also play a sealing role.

[0103] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the article or device comprising the element. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The orientation or positional relationship indicated by "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0104] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A ploughing device for burning straw and returning flue gas and ash to the field, characterized in that: include: A frame (100), a feeding system (200), an ash treatment system (300), a flue gas treatment system (400) and a plowshare assembly (500), wherein: The bottom of the frame (100) is provided with moving wheels (110); The feeding system (200) is arranged on the frame (100), and the straw is fed through a feeder. A combustion chamber (210) and a blower (220) are arranged at the end of the feeder, and the blower (220) is connected to the combustion chamber (210); The ash handling system (300) is connected to the bottom of the combustion chamber (210), and the ash handling system (300) comprises an ash lock (310) and an ash discharge pipe (320) connected in sequence from top to bottom, and the ash discharge pipe (320) is provided with a vertical section and a horizontal section; The flue gas treatment system (400) is arranged at the bottom of the feeder near the combustion chamber (210); the flue gas treatment system (400) comprises a plurality of smoke guide pipes (410), the upper ends of the plurality of smoke guide pipes (410) are connected to the combustion chamber (210) through the feeder, and the ends of the plurality of smoke guide pipes (410) are connected to a smoke exhaust pipe (420); the smoke exhaust pipe (420) is provided with a vertical section and a horizontal section, the horizontal section comprises a plurality of adjustable smoke exhaust units (421), and a smoke exhaust hole is provided on the pipe wall of each smoke exhaust unit (421); The plowshare assembly (500) is arranged below the frame (100); the plowshare assembly (500) comprises a front plow (510) and a rear plow (520); the front plow (510) is used to plow the soil to form a soil ditch, and the horizontal sections of the ash discharge pipe (320) and the smoke exhaust pipe (420) both extend into the soil ditch; the rear plow (520) is used to turn over the soil to cover the horizontal sections of the ash discharge pipe (320) and the smoke exhaust pipe (420).

2. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 1, characterized in that: The frame (100) is also provided with a fuel tank installation area (120) for installing a fuel tank, and the fuel tank is connected to an ignition nozzle (211) arranged in the combustion chamber (210) through a pipeline.

3. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 1, characterized in that: The feeder comprises a main feeder (230) and an auxiliary feeder (240), wherein the main feeder (230) and the auxiliary feeder (240) are arranged perpendicular to each other and are both used to deliver straw into the combustion chamber (210); a grate (250) is arranged between the feeder and the combustion chamber (210), and a scraper is arranged on a side of the grate (250) close to the combustion chamber (210), and the scraper is coaxially connected to the transmission main shaft of the main feeder (230).

4. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 1, characterized in that: The ash treatment system (300) comprises an upper pressure valve (330), an ash lock (310), a lower pressure valve (340) and an ash discharge pipe (320) which are connected in sequence from top to bottom; the end of the horizontal section of the ash discharge pipe (320) is an open structure, and the upper part of the open structure is longer than the lower part.

5. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 4, characterized in that: The ash treatment system (300) further comprises a pressurizing valve (350), one end of which is connected to the combustion chamber (210) or an external pressurized air source via a pipeline, and the other end of which is connected to the ash lock (310) via a pipeline.

6. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 3, characterized in that: The upper and lower parts of the ash lock (310) are arranged as opposed truncated cones, and the inner wall of the ash lock (310) is a conical surface; The ash lock (310) is provided with an ash discharge assisting device, which comprises: an upper connecting arm (3101), a middle shaft (3102), a middle connecting arm (3103), a stirring paddle (3104) and an ash discharge assisting paddle (3105), wherein: The upper connecting arm (3101), the middle connecting arm (3103), the stirring paddle (3104) and the ash removal assisting paddle (3105) are arranged in sequence from top to bottom; the upper connecting arm (3101) is perpendicular to the conical surface of the inner wall of the ash lock (310); the upper connecting arm (3101) is rotatably connected to the central axis (3102); the middle connecting arm (3103) is fixedly connected to the central axis (3102); the driving motor (360) is arranged outside the ash lock (310) and is transmission-connected to the middle connecting arm (3103); the stirring paddle (3104) and the ash removal assisting paddle (3105) are both coaxially connected to the central axis (3102), and the stirring paddle (3104) and the ash removal assisting paddle (3105) are both driven to rotate by the central axis (3102).

7. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 1, characterized in that: Each of the smoke guide pipes (410) is provided with a smoke pressure regulating valve (430), and the exhaust pressure of smoke generated by burning straw in the combustion chamber (210) is adjusted by the smoke pressure regulating valve (430).

8. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 1, characterized in that: The multiple smoke exhaust units (421) are connected via flanges or threads, and at least one smoke exhaust protection cover (422) is provided outside each smoke exhaust unit (421). The smoke exhaust protection cover (422) is in direct contact with the soil and is used to prevent the smoke exhaust holes on the pipe wall of the smoke exhaust unit (421) from being blocked by the soil.

9. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 1, characterized in that: At least part of the smoke exhaust unit (421) is made of a deformable flexible material.

10. The integrated ploughing device for straw burning and flue gas ash return to the field according to claim 9, characterized in that: Also includes: A height adjuster (600), the height adjuster (600) comprising an extension section and a connection section connected to each other, the length of the extension section being adjustable; The vertical sections of the ash exhaust pipe (320) and the smoke exhaust pipe (420) are both configured as upper and lower sections that are slidably connected, and the upper and lower sections are sealed by grease; The connecting section respectively connects the lower sections of the vertical sections of the ash exhaust pipe (320) and the smoke exhaust pipe (420) to adjust the height of the horizontal sections of the ash exhaust pipe (320) and the smoke exhaust pipe (420) from the ground.

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