Energy-saving device and process for straw heat treatment and resource utilization of residual gas

Abstract

The present application provides a kind of straw heat treatment and residual gas resource utilization energy-saving device and process, belong to straw processing technical field, including collection feeding system and straw heat treatment system, the collection feeding system is used to feed straw into straw heat treatment system, the straw heat treatment system is used to burn straw, one side of the straw heat treatment system is provided with exhaust system, the gas outlet of the exhaust system is close to farmland, the exhaust system includes ignition mechanism one, and the ignition mechanism one is used to ignite combustible gas in pipeline;By setting the exhaust system, the combustible gas generated during the combustion of straw can be extracted, and then burned by the ignition mechanism, to avoid the direct emission of harmful gases generated during incomplete combustion of straw to pollute the environment, while the secondary combustion of combustible gas is reused, so that the combustible gas is no longer inefficient combustion, inactivates pests in farmland during combustion, improves resource utilization.

Description

Technical Field

[0001] This invention belongs to the field of straw treatment technology, specifically an energy-saving device and process for straw heat treatment and waste gas resource utilization. Background Technology

[0002] As a major agricultural country, my country has made the recycling and reprocessing of crop straw a focus of widespread social concern. On the one hand, the unreasonable use of large amounts of straw will lead to the waste of resources. Simple burning will increase the emission of harmful gases, causing environmental pollution and hindering the requirements of energy conservation and emission reduction. On the other hand, the extensive use of traditional nutrient soil and plastic tray seedling cultivation methods will not only damage farmland soil and vegetation, causing large areas of land to become barren, but will also pollute the environment and make field management difficult. Therefore, in order to further improve the utilization rate of straw and reduce the waste of straw resources and the pollution caused by it, straw is now usually burned and returned to the field to provide fertilizer for the land. However, among the existing methods, there are two approaches: one is to directly burn the straw and return it to the field. Although this method is efficient and simple, the stacked or scattered straw is prone to incomplete combustion or omissions, and the resulting harmful smoke will have a certain impact on air quality. Moreover, if it is not burned, pests will be serious. Another approach is to collect the straw and make it into organic carbon to return to the field. This method will also produce a large amount of organic gases and heat that are directly emitted, polluting the environment and wasting resources.

[0003] Therefore, we propose an energy-saving device and process for straw heat treatment and waste gas resource utilization to solve the problems encountered above. Summary of the Invention

[0004] The purpose of this invention is to address the problems of direct burning of straw for returning to the field. While this method is efficient and simple, stacked or scattered straw is prone to incomplete combustion or omissions, resulting in harmful fumes that affect air quality. Furthermore, without combustion, pest infestations are severe. Another method involves collecting straw to produce organic carbon for returning to the field, but this also generates a large amount of organic gases and heat that are directly emitted, polluting the environment and wasting resources. Therefore, this invention proposes an energy-saving device and process for straw heat treatment and waste gas resource utilization.

[0005] The objective of this invention can be achieved through the following technical solution: it includes a collection and feeding system and a straw heat treatment system. The collection and feeding system is used to feed straw into the straw heat treatment system. The straw heat treatment system is used to burn straw. An exhaust system is provided on one side of the straw heat treatment system. The exhaust outlet of the exhaust system is close to the farmland. The exhaust system includes an ignition mechanism for igniting combustible gas in the pipe.

[0006] In a preferred embodiment of the present invention, a discharge system is also provided on one side of the straw heat treatment system, which is used to discharge the solid matter after the straw is burned.

[0007] In a preferred embodiment of the present invention, the exhaust system further includes a secondary combustion chamber and an exhaust pipe. The first ignition mechanism is disposed at the outlet of the exhaust pipe. The inlet end of the exhaust pipe is connected to the interior of the secondary combustion chamber. The secondary combustion chamber is connected to the interior of the primary combustion chamber through the first exhaust pipe. The second ignition mechanism is disposed on the secondary combustion chamber.

[0008] In a preferred embodiment of the present invention, the discharge system includes a conveying device three, and a heat exchanger is provided on the exhaust pipe one. One side of the heat exchanger is connected to the interior of the conveying device three through an exhaust pipe two.

[0009] In a preferred embodiment of the present invention, a temporary storage chamber is provided at the discharge port of the conveying device three, and the temporary storage chamber is connected to the interior of the secondary combustion chamber through the exhaust pipe three.

[0010] In a preferred embodiment of the present invention, an air pump is provided on each of the exhaust pipe one, the exhaust outlet pipe, and the exhaust pipe three; a switch valve is provided on the exhaust outlet pipe; and a proportional regulating valve is provided on the exhaust pipe three. The exhaust system has two operating states: In the first working state, the switching valve is activated, ignition mechanism one is activated, ignition mechanism two is closed, and the proportional regulating valve is closed; In the second operating state, the switch valve is closed, ignition mechanism one is closed, ignition mechanism two is activated, and the proportional regulating valve is opened.

[0011] In a preferred embodiment of the present invention, the collection and feeding system includes a picking and feeding machine and a conveying device, wherein the discharge port of the picking and feeding machine is connected to the inlet of the conveying device.

[0012] In a preferred embodiment of the present invention, the straw heat treatment system includes a primary combustion chamber and a second conveying device, wherein the primary combustion chamber is disposed above the second conveying device, the discharge port of the first conveying device is connected to the inlet of the primary combustion chamber, the discharge port of the second conveying device is connected to the inlet of the third conveying device, and an air pump is provided at the connection.

[0013] As a preferred embodiment of the present invention, an energy-saving process for straw heat treatment and waste gas resource utilization specifically includes the following steps: Step 1: Collect straw from farmland using a picking and feeding machine; Step 2: The conveying device 1 transports the straw collected by the picking and feeding machine into the primary combustion chamber; Step 3: The primary combustion chamber burns the straw inside. Step 4: The solid material after straw burning is conveyed from conveyor device 2 to conveyor device 3. At the same time, the gas and residual gas produced after combustion will be discharged through the exhaust system. The exhaust system can ignite it. The heat generated during combustion heats and dries the solid material after straw burning inside conveyor device 3. Step 5: During combustion, the fume removal equipment is activated to collect the flue gas produced during combustion; Step Six: Conveying device three discharges the solid material after straw burning onto farmland.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The exhaust system can extract the combustible gases produced when straw is burned, and then ignite them through an ignition mechanism. This avoids the direct emission of harmful gases that pollute the environment when straw is not completely burned. At the same time, the secondary combustion of combustible gases makes them no longer ineffective combustion. The combustion process also kills pests in farmland and improves resource utilization. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a perspective view of the present invention. Figure 4 This is a left sectional perspective view of the present invention; Figure 5 This is a flow diagram of the products generated in the primary combustion chamber of the present invention.

[0017] In the diagram: 1. Collection and feeding system; 101. Pick-up and feeding machine; 102. Conveying device one; 2. Straw heat treatment system; 201. Primary combustion chamber; 202. Conveying device two; 3. Discharge system; 301. Conveying device three; 302. Temporary storage room; 4. Exhaust system; 401. Exhaust pipe one; 402. Heat exchanger; 403. Secondary combustion chamber; 404. Exhaust pipe; 405. Exhaust pipe two; 406. Exhaust pipe three; 407. Ignition mechanism one; 408. Ignition mechanism two. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0023] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Example 1:

[0024] Please see Figure 1 - Figure 5 As shown, an energy-saving device for straw heat treatment and waste gas resource utilization includes a collection and feeding system 1 and a straw heat treatment system 2. The collection and feeding system 1 is used to feed straw into the straw heat treatment system 2, which is used to burn the straw. An exhaust system 4 is provided on one side of the straw heat treatment system 2, with the exhaust outlet of the exhaust system 4 close to the farmland. The exhaust system 4 includes an ignition mechanism 407, which is used to ignite the combustible gas in the pipeline. The collection and feeding system 1 is used to collect the straw for easy transportation to the straw heat treatment system 2. When the straw heat treatment system 2 burns the straw, some of the straw is completely burned, while some is incompletely burned. Burning straw incompletely produces organic carbon and combustible gases, some of which are harmful. The combustible gases and residual gases produced can be discharged through the exhaust system 4. Then, the exhaust system 4 discharges the combustible gases and residual gases from the straw heat treatment system 2. Next, the combustible gases in the gas are burned by the ignition mechanism 407 and then discharged to the outside, avoiding direct emission of harmful gases and reducing environmental pollution. At the same time, the combustion can kill pests in the farmland, realize the recycling of residual gases, and reduce resource waste. Oil fume removal equipment can also be installed around the exhaust system 4 to treat the flue gas produced when the combustible gases ignited by the ignition mechanism 407 are burned.

[0025] A discharge system 3 is also provided on one side of the straw heat treatment system 2. The discharge system 3 is used to discharge the solid matter after the straw is burned. Because the straw is not completely burned in the straw heat treatment system 2, the solid matter after the straw is burned includes organic carbon. The organic carbon is discharged into the farmland through the discharge system 3, which can improve the soil and fix carbon for a long time.

[0026] The exhaust system 4 also includes a secondary combustion chamber 403 and an exhaust pipe 404. An ignition mechanism 407 is installed at the outlet of the exhaust pipe 404. The inlet of the exhaust pipe 404 is connected to the interior of the secondary combustion chamber 403. The secondary combustion chamber 403 is connected to the interior of the primary combustion chamber 201 through an exhaust pipe 401. An ignition mechanism 408 is installed on the secondary combustion chamber 403. The outlet of the exhaust pipe 404 can face downwards towards the discharge system 3. When the combustible gas is burning, the discharge system 3 can become a device similar to a cooking device, which can dry the organic carbon inside the discharge system 3, reduce the moisture content inside the organic carbon, and improve the stability of the organic carbon. The secondary combustion chamber 403 can be set up so that after the exhaust pipe 404 burns the pests in the farmland within a certain range, the exhaust pipe 404 can be closed. At this time, the organic gas is ignited inside the secondary combustion chamber 403, which facilitates the recovery of the heat generated during combustion and avoids waste caused by air combustion at the exhaust pipe 404. Preferably, the exhaust pipe 404 can be a flexible hose, or its exhaust port end can be a flexible hose, so that the exhaust port of the exhaust pipe 404 can be adjusted to any direction, thereby burning over a larger area of ​​farmland and dealing with pests in a larger area of ​​farmland. The inner wall of the exhaust pipe 404 can also be provided with a guide groove to evenly disperse the airflow and improve the combustion stability. The ignition mechanism 407 can adopt a pulse ignition method, which can respond quickly, ignite reliably, and adapt to different concentrations of combustible gas. It can also adopt piezoelectric ignition, electric spark ignition, etc. The exhaust system 4 can also be equipped with temperature and gas concentration sensors to monitor the internal state of the exhaust system 4 in real time and dynamically adjust the ignition timing and gas supply, thereby ensuring that the residual gas and combustible gas can be fully burned without secondary pollution. In one possible implementation, the exhaust system 4 can eliminate the external pipe design and instead have multiple built-in flues arranged circumferentially or longitudinally inside the device walls of the straw heat treatment system 2 and the discharge system 3. The air inlet of the internal flue of the straw heat treatment system 2 is located at the top of the heat treatment system, and the air outlet extends to the outside of the straw heat treatment system 2 near the farmland. The ignition mechanism 407 is located at the air outlet. Spiral or longitudinal built-in air channels are arranged on the inner wall of the shell of the discharge system 3. The air inlets of these air channels are connected to the built-in flues of the straw heat treatment system 2 through interfaces on the shell, and the air outlets are connected to the interior of the discharge system 3. At the same time, the built-in flues and the built-in air channels can be connected by quick-plug sealing interfaces, which facilitates the disassembly and maintenance of the equipment.

[0027] The discharge system 3 includes a conveying device 301 and a heat exchanger 402 installed on the exhaust pipe 401. One side of the heat exchanger 402 is connected to the interior of the conveying device 301 through the exhaust pipe 405. The air inlet of the exhaust pipe 401 is located at the top of the straw heat treatment system 2. Because gas and heat flow upwards, it is convenient to extract the gas and heat inside the straw heat treatment system 2, so that the combustible gas can be smoothly extracted through the exhaust pipe 401. The heat exchanger 402 can replace the heat inside the exhaust pipe 401 and then transfer the heat-carrying medium to the exhaust pipe 405. Then, it is introduced into the interior of the conveying device 301 through the exhaust pipe 405 to evaporate the organic carbon inside the conveying device 301. Thus, the heat in the gas discharged from the straw heat treatment system 2 is reused, saving energy and reducing waste. Preferably, because the device has a certain height, multiple sets of conveying devices 301 are provided, which can be set to any integer number greater than or equal to two. Three sets of conveying devices 301 are the optimal choice for the overall height. The setting of multiple sets of conveying devices 301 allows the organic carbon to be in contact with heat for more time during the transfer process, thereby improving the evaporation effect of the organic carbon. The shell of the multiple sets of conveying devices 301 can be wrapped with insulation material, such as rock wool, to reduce heat loss. There is a certain gap between the spiral blades inside the screw conveyor and the shell, which ensures stable conveying of organic carbon while allowing airflow to flow back upward through the gap. Understandably, in one possible implementation, the discharge system 3 can also be designed as an inclined or vertical design, but it has a structure inside that can move organic carbon out and fall into the farmland, and the organic carbon needs sufficient evaporation time before being sent out of the discharge system 3.

[0028] A temporary storage chamber 302 is provided at the discharge port of the conveying device 301. The temporary storage chamber 302 is connected to the interior of the secondary combustion chamber 403 through the exhaust pipe 306. The temporary storage chamber 302 can temporarily store the organic carbon conveyed by the conveying device 301. The exhaust pipe 306 can discharge the combustion gas and heat into the temporary storage chamber 302 to further dry the organic carbon in the temporary storage chamber 302. Air pumps are installed on exhaust pipe 401, exhaust pipe 404, and exhaust pipe 406. These air pumps generate a fixed-direction airflow inside each of these pipes. Exhaust pipe 401 extracts the combusted gases from the primary combustion chamber 201, while exhaust pipes 404 and 406 extract the gases from the secondary combustion chamber 403. An on / off valve is installed on exhaust pipe 404, and a proportional control valve is installed on exhaust pipe 406. The exhaust system 4 has two operating states. The on / off valve and the proportional control valve are used to open or close exhaust pipes 404 and 406 according to the different operating states of the exhaust system 4. In the first working state, the switch valve is activated, the ignition mechanism 1 407 is activated, the ignition mechanism 2 408 is closed, and the proportional regulating valve is closed. At this time, an airflow is formed in the exhaust system 4 from the exhaust pipe 1 401 to the heat exchanger 402 to the secondary combustion chamber 403 and then to the outlet pipe 404, thereby discharging the organic gas generated in the primary combustion chamber 201 from the outlet of the outlet pipe 404. The gas is ignited by the ignition mechanism 1 407, and the flame during combustion kills pests in the farmland around the device. At the same time, when the gas is discharged from the exhaust pipe 1 401 to the heat exchanger 402, the heat exchanger 402 will conduct the heat in the gas to the exhaust pipe 2 405, and the heat is introduced into the conveying device 3 301 through the exhaust pipe 2 405 to evaporate the organic carbon. In the second working state, the switch valve is closed, the ignition mechanism 1 407 is closed, the ignition mechanism 2 408 is activated, and the proportional regulating valve is opened. At this time, an airflow is formed in the exhaust system 4 from the exhaust pipe 1 401 to the heat exchanger 402 to the secondary combustion chamber 403 and then to the exhaust pipe 3 406, so that the organic gas is burned in the secondary combustion chamber 403. The generated gas carries heat and is discharged to the temporary storage chamber 302 through the exhaust pipe 3 406 to evaporate the organic carbon in the temporary storage chamber 302. While treating the organic gas, the heat is recycled to avoid the direct emission of heat and waste of resources.

[0029] Preferably, after the organic gas is re-burned inside the secondary combustion chamber 403, the resulting gas no longer pollutes the environment or reduces the pollution caused to the environment. The gas has a low oxygen content and contains a certain amount of inert gases such as carbon dioxide. After these gases enter the conveying device 301, they can effectively inhibit the contact between organic carbon and oxygen, reducing the risk of slow oxidation or spontaneous combustion of organic carbon. In addition, if the gas contains unburned tar or volatile components, it will be adsorbed and intercepted by the organic carbon when passing through it. After this part of the organic carbon is discharged to the farmland, the tar degrades in the soil, further improving the soil and increasing soil fertility. Since gas and heat flow upward, the gas inside the conveying device 301 will flow upward through multiple sets of conveying devices 301, thus flowing back into the straw heat treatment system 2. The heat carried by the returning gas can preheat the raw materials entering the straw heat treatment system 2 or supplement the heat required for the reaction. Some unburned combustible components in the gas can also be re-burned, improving energy conversion efficiency, reducing pollutant emissions, and making the device more energy-efficient and efficient. Preferably, the outlet of the exhaust pipe 405 is not directly connected to the interior of the bottom conveying device 301. Instead, a gas distributor is connected to the outlet. The gas distributor is a porous pipe distributed along the axial direction of the conveying device 301, with its openings facing the organic carbon inside the conveying device 301. When the high-temperature gas containing heat and tar is evenly sprayed into the interior of the conveying device 301 through the distributor, it can not only dry the organic carbon more evenly and efficiently, but also cause the tar and other organic matter to partially decompose at high temperature. The resulting carbon is further deposited in the pores of the organic carbon, forming an "activated carbon coating layer" or "carbon deposition modification", which makes the organic carbon have higher porosity and stronger adsorption capacity. After being returned to the field as a soil conditioner, the water and fertilizer retention effect is more significant. Understandably, in one possible implementation, the exhaust port of exhaust pipe 2 405 can be connected to a rotatable jet pipe that passes through conveying device 3 301 and extends into it. The jet pipe can rotate slowly under the drive of a motor or airflow backlash. One or more air outlets are provided on the jet pipe. When rotating, it can spray organic carbon inside conveying device 3 301 to achieve large-area coverage. The structure is simple and also has a self-cleaning function.

[0030] The collection and feeding system 1 includes a picking and feeding machine 101 and a conveying device 102. The discharge port of the picking and feeding machine 101 is connected to the inlet of the conveying device 102. The picking and feeding machine 101 can grab straw from the farmland and send it to the inlet of the conveying device 102. Then the conveying device 102 can transport the straw to the straw heat treatment system 2. Understandably, the material collection and feeding system 1 can also be directly replaced by a hopper. The hopper is directly set on the primary combustion chamber 201, so that the outlet of the hopper is connected to the inlet of the primary combustion chamber 201. When in use, the straw is filled inside the hopper, and then the straw is gradually transported into the primary combustion chamber 201 through the hopper during straw processing.

[0031] The straw heat treatment system 2 includes a primary combustion chamber 201 and a second conveying device 202. The primary combustion chamber 201 is located above the second conveying device 202. The discharge port of the first conveying device 102 is connected to the inlet of the primary combustion chamber 201, and the discharge port of the second conveying device 202 is connected to the inlet of the third conveying device 301. An air pump is provided at the connection. An air inlet is provided on one side of the primary combustion chamber 201 and is connected to an external air intake device to introduce oxygen into the primary combustion chamber 201. The air inlet is located far away from the exhaust pipe 101 to prevent the gas from being drawn away by the exhaust pipe 101 as soon as it enters the air inlet, thus affecting the combustion of the primary combustion chamber 201. The second conveying device 202 can be a chain grate with a slag remover. The solid material generated by the burning of straw in the primary combustion chamber 201 can fall onto the chain of the chain grate with the slag remover and be transported to the discharge system 3 by the chain. Preferably, the air pumps installed at each pipe and connection point can provide suction, allowing the exhaust pipe 401 to smoothly extract the gas produced after combustion in the primary combustion chamber 201, the exhaust pipe 405 to smoothly pass the heated gas into the conveying device 301, the exhaust pipe 404 to extract and ignite the gas in the secondary combustion chamber 403, and the exhaust pipe 406 to extract the gas in the secondary combustion chamber 403 into the temporary storage chamber 302 and provide an upward airflow to the conveying device 301, so that the gas in the conveying device 301 can flow back upward more smoothly into the primary combustion chamber 201. Understandably, in one possible implementation, the air pumps of exhaust pipe 2 405 and exhaust pipe 3 406 can operate in an intermittent mode. This is because the intermittently injected airflow can impact the organic carbon in a pulsed manner, penetrating deep into the interior of the deposit layer, while continuous airflow often only flows on the surface. The pulsed airflow can cause the organic carbon particles to move or vibrate slightly, constantly renewing the contact surface between the gas and the particles, thus improving the drying effect. Furthermore, the pulsed effect allows the injected gas to have sufficient time to diffuse and penetrate within the conveying device when there is no air intake. When injected again, the new gas mixes with the diffused gas, forming a piston-like propulsion, thereby avoiding short circuits that cause ineffective flow. Example 2:

[0032] Please see Figure 1 - Figure 5As shown, the present invention also discloses an energy-saving process for straw heat treatment and waste gas resource utilization, which specifically includes the following steps; Step 1: Collect straw from farmland using the picking and feeding machine 101. The straw will first be collected in the hopper above the feed end of the conveying device 102, and then the straw will gradually enter the feed inlet of the conveying device 102 from inside the hopper. Step 2: The straw inside the conveying device 102 is conveyed to the feed inlet of the primary combustion chamber 201 through the conveying device 102, and then fed into the interior of the primary combustion chamber 201 through the feed inlet of the primary combustion chamber 201. Step 3: Oxygen is introduced into the primary combustion chamber 201 through the air intake device and air intake pipe. Then, the straw inside the primary combustion chamber 201 is incompletely burned in an oxygen-deficient environment to generate solid organic carbon and high-temperature flue gas containing combustible gases. Step 4: Solid organic carbon falls onto conveyor 202 and is then fed into conveyor 301. Multiple conveyors 301 then transport the organic carbon from top to bottom. The high-temperature flue gas inside the primary combustion chamber 201 is extracted through the exhaust pipe 401 and then discharged through the outlet of the exhaust pipe 404 along the secondary combustion chamber 403. The combustible gas in it is ignited by the ignition mechanism 407. The flame of combustion kills pests in the farmland. At the same time, the flame is located below the bottom conveying device 301. The heat generated by the flame combustion is conducted to the surface of the bottom conveying device 301, heating and drying the organic carbon transferred there. After the pests around the farmland are killed, the switch valve is closed so that the gas is no longer discharged through the gas outlet pipe 404. At the same time, the proportional regulating valve and the second ignition mechanism 408 are opened so that the gas is ignited inside the secondary combustion chamber 403. The gas produced after combustion is extracted into the temporary storage chamber 302 through the third exhaust pipe 406. The heat in the gas is used to dry the organic carbon in the second stage. After the heat exchange is completed, the gas flows back into the straw heat treatment system 2 due to the thermal pressure difference and airflow direction to preheat the newly entered raw materials and complete the internal recycling of the entire heat energy. Step 5: When the organic gas is ignited by the ignition mechanism 407, the surrounding oil fume removal equipment is activated to collect the fumes during combustion and prevent the direct emission of oil fumes from polluting the environment. Step Six: Finally, the dried and modified organic carbon is discharged into the farmland through the outlet of the bottom conveyor device 301.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy-saving device for straw heat treatment and waste gas resource utilization, comprising a collection and feeding system (1) and a straw heat treatment system (2), wherein the collection and feeding system (1) is used to feed straw into the straw heat treatment system (2), and the straw heat treatment system (2) is used to burn straw, characterized in that, The straw heat treatment system (2) is provided with an exhaust system (4) on one side. The exhaust outlet of the exhaust system (4) is close to the farmland. The exhaust system (4) includes an ignition mechanism (407) for igniting the combustible gas in the pipe.

2. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 1, characterized in that, A discharge system (3) is also provided on one side of the straw heat treatment system (2), which is used to discharge the solid matter after the straw is burned.

3. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 2, characterized in that, The exhaust system (4) further includes a secondary combustion chamber (403) and an exhaust pipe (404). The first ignition mechanism (407) is installed at the outlet of the exhaust pipe (404). The inlet end of the exhaust pipe (404) is connected to the interior of the secondary combustion chamber (403). The secondary combustion chamber (403) is connected to the interior of the primary combustion chamber (201) through the first exhaust pipe (401). The second ignition mechanism (408) is installed on the secondary combustion chamber (403).

4. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 3, characterized in that, The discharge system (3) includes a conveying device three (301), and a heat exchanger (402) is provided on the exhaust pipe one (401). One side of the heat exchanger (402) is connected to the interior of the conveying device three (301) through the exhaust pipe two (405).

5. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 4, characterized in that, The discharge port of the conveying device three (301) is provided with a temporary storage chamber (302), which is connected to the interior of the secondary combustion chamber (403) through the exhaust pipe three (406).

6. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 5, characterized in that, Air pumps are installed on exhaust pipe one (401), exhaust pipe (404) and exhaust pipe three (406). A switch valve is installed on exhaust pipe (404) and a proportional regulating valve is installed on exhaust pipe three (406). The exhaust system (4) has two working states: In the first working state, the switching valve is activated, the ignition mechanism one (407) is activated, the ignition mechanism two (408) is closed, and the proportional regulating valve is closed; In the second working state, the switch valve is closed, the ignition mechanism one (407) is closed, the ignition mechanism two (408) is started, and the proportional regulating valve is opened.

7. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 4, characterized in that, The collection and feeding system (1) includes a picking and feeding machine (101) and a conveying device (102), wherein the outlet of the picking and feeding machine (101) is connected to the inlet of the conveying device (102).

8. The energy-saving device for straw heat treatment and waste gas resource utilization according to claim 7, characterized in that, The straw heat treatment system (2) includes a primary combustion chamber (201) and a second conveying device (202), and the primary combustion chamber (201) is located above the second conveying device (202). The discharge port of the first conveying device (102) is connected to the inlet of the primary combustion chamber (201), and the discharge port of the second conveying device (202) is connected to the inlet of the third conveying device (301). An air pump is provided at the connection.

9. An energy-saving process for straw heat treatment and waste gas resource utilization, characterized in that, Specifically, the following steps are included: Step 1: Collect straw from farmland using a picking and feeding machine (101); Step 2: Conveying device 1 (102) conveys the straw collected by the picking and feeding machine (101) into the primary combustion chamber (201); Step 3: The primary combustion chamber (201) burns the straw inside; Step 4: The solid material after straw burning is conveyed into the interior of the conveying device 3 (301) through the second conveying device (202). At the same time, the gas and residual gas generated after combustion will be discharged through the exhaust system (4). The exhaust system (4) can ignite it. The heat generated during combustion heats and dries the solid material after straw burning inside the third conveying device (301). Step 5: During combustion, the fume removal equipment is activated to collect the flue gas produced during combustion; Step 6: Conveying device 3 (301) discharges the solid material after straw burning onto farmland.

Images