A rapid repair vehicle for in-situ continuous cropping barrier soil

Abstract

The application discloses a kind of in situ continuous cropping obstacle soil quick repair vehicle, it includes soil collection conveying mechanism, air distribution mechanism, combustion furnace, pulverizer, water vapor recovery mechanism, walking mechanism;Soil collection conveying mechanism is installed at walking mechanism front end by support, combustion furnace, air distribution mechanism, water vapor recovery mechanism are installed above walking mechanism, and pulverizer is set in the top of combustion furnace;The device has the characteristics of strong environmental adaptability, in-situ repair;The present application makes full use of biochar, temperature and other various repair factors, can effectively treat the content of pathogenic microorganism, autotoxic substance in continuous cropping obstacle soil, has positive significance to improve crop yield and quality, not only effectively solves the problem of quick continuous cropping obstacle soil treatment, simultaneously provides new ideas for the treatment and disposal of rural organic waste.

Description

Technical Field

[0001] This invention belongs to the field of combustion furnace technology, specifically relating to a rapid in-situ continuous cropping obstacle soil remediation vehicle. Background Technology

[0002] Agriculture is my country's primary industry, but due to limited usable land, continuous cropping has become an unavoidable problem, leading to increasingly severe issues related to continuous cropping obstacles in recent years. However, there are few reports on using thermal treatment to remediate soils affected by continuous cropping obstacles, and no research on high-temperature, oxygen-limited synergistic pyrolysis has been reported. High-temperature, oxygen-limited treatment is characterized by its speed, in-situ remediation capability, and strong adaptability. Previous treatment methods mainly involved strong soil reduction treatment or crop rotation. This equipment utilizes in-situ remediation technology, allowing direct remediation of soils affected by continuous cropping obstacles in farmland, eliminating the need to transport the soil to external treatment facilities, saving transportation costs, and reducing environmental pollution during the remediation process. Furthermore, developing and utilizing waste biomass is not only an important measure for comprehensive rural environmental management and non-point source pollution control, but also an essential path to alleviate the resource and energy crisis in my country and even the world, and to reduce greenhouse gas emissions. Adding agricultural and forestry waste as organic material to produce biochar can not only provide a solution for rural non-point source pollutants but also assist in the remediation of soils affected by continuous cropping obstacles, achieving resource utilization of waste. It is not difficult to deduce that agricultural and forestry waste can be mixed with the soil to be treated and then synergistically pyrolyzed to produce biochar-soil mixture for soil remediation. At the same time, the high temperature during pyrolysis can be used to reduce and kill pathogenic microorganisms and reconstruct the soil microbial community structure. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides an in-situ continuous cropping obstacle soil thermal treatment remediation vehicle, which aims to provide rapid and efficient in-situ remediation, adapt to various working conditions, and improve production efficiency.

[0004] The in-situ continuous cropping obstacle soil rapid remediation vehicle of the present invention includes a soil collection and conveying mechanism, an air distribution mechanism, a combustion furnace, a crusher, a water vapor recovery mechanism, and a walking mechanism; the soil collection and conveying mechanism is installed at the front end of the walking mechanism via a bracket, the combustion furnace, the air distribution mechanism, and the water vapor recovery mechanism are installed above the walking mechanism, and the crusher is located on the top of the combustion furnace;

[0005] The combustion furnace includes an outer shell and an inner shell. The inner cavity of the inner shell is the combustion chamber, which is equipped with a partition and one or more layers of resistance wire. The cavity between the outer shell and the inner shell is the insulation chamber. The outer shell has a combustion furnace air inlet, a screening material outlet, and a fuel addition port, which are connected to the combustion chamber. The inner shell has a flue gas outlet I, which is connected to the insulation chamber. The outer shell has a flue gas outlet II, which is connected to a water vapor recovery mechanism through a pipe. The top of the outer shell has a combustion furnace material inlet, which is connected to the combustion chamber. The discharge port of the crusher is connected to the combustion furnace material inlet. The bottom of the combustion furnace has an outlet.

[0006] The soil collection and conveying mechanism includes a plow bucket, a conveyor belt II, and a conveyor belt I. The plow bucket is located at the front end of the conveyor belt I, and the rear end of the conveyor belt I is located above the feed inlet of the crusher. The conveyor belt II is fixed to one side of the combustion furnace by a bracket. One end of the conveyor belt II passes through the screen outlet and is located below the material inlet of the combustion furnace. The other end of the conveyor belt II extends above the conveyor belt I and is equipped with a baffle on one side.

[0007] The water vapor recovery mechanism includes a shell, which is divided into a condensation recovery chamber and a purification chamber. A condensation recovery pipe is installed in the condensation recovery chamber. The condensation recovery pipe is a serpentine bend. The bottom of the condensation recovery chamber is connected to the bottom of the purification chamber and the bottom of the condensation recovery chamber is connected to the condensate outlet. Several baffles are arranged alternately and asymmetrically in the purification chamber, and adsorbent is placed between the baffles. A flue gas inlet is opened on one side of the top of the condensation recovery chamber, and a flue gas outlet III is opened on the top of the purification chamber.

[0008] This device also includes a power source and a PLC controller. The power source is connected to the walking mechanism, crusher, air distribution mechanism and resistance wire layer through the PLC controller, and the switching of other components is controlled by conventional control methods.

[0009] The walking mechanism is a tracked walking mechanism, and the conveyor belt II is a hollow conveyor belt with holes having a diameter of 6-9 cm.

[0010] The air distribution mechanism is a blower, and the blower outlet is connected to a jet pipe installed in the air inlet of the combustion furnace. The jet pipe forms an angle of 0-30° with the horizontal plane. Rollers are installed between the plow bucket and the conveyor belt I.

[0011] When the above-mentioned device is in use, the soil and organic matter to be remediated are collected by the plow bucket and conveyed to the crusher by conveyor belt I. The crushed soil falls onto conveyor belt II. Small particles enter the combustion chamber, while large particles are sent back to conveyor belt I by conveyor belt II and crushed again. Conveyor belt II also acts as a screen. The crushed material entering the combustion chamber falls onto the partition screen for stratified combustion. When additional organic materials are needed, biomass fuel is added through the fuel addition port to assist combustion. The organic materials in the combustion chamber are ignited to provide an auxiliary heat source. After heat treatment, the soil is discharged to the ground through the bottom outlet of the combustion furnace. The gas produced by combustion enters the insulation chamber from flue gas outlet I and then enters the water vapor recovery mechanism from flue gas outlet II. The flue gas passes through the condensation recovery pipe in the water vapor recovery mechanism from top to bottom to recover water. After condensation, the water is discharged from the condensate outlet and reused to replenish the soil moisture. When the flue gas reaches the bottom, it enters the purification chamber (purified by adsorbents, including various gas catalytic purification materials such as porous biochar) and is discharged from flue gas outlet III.

[0012] Organic waste was added as a heat source during the pyrolysis process, including livestock and poultry manure, wheat straw, rice husk charcoal, rubberwood charcoal, and tobacco charcoal.

[0013] Advantages and technical effects of the present invention:

[0014] This equipment features strong environmental adaptability and in-situ remediation capabilities. It boasts high efficiency and excellent remediation effects, fully utilizing biochar, temperature, and other remediation factors. It effectively addresses the content of pathogenic microorganisms and autotoxic substances in soils affected by continuous cropping. The device is equipped with an air distribution system, further enhancing remediation efficiency. The double-layered combustion furnace effectively retains pyrolysis temperature, saving energy and achieving rapid high-temperature soil disinfection. The invention utilizes a water vapor recovery mechanism to circulate and recover moisture, minimizing the need for supplementary water usage. The heating method, employing resistance heating, ensures the structural stability, mechanical strength, and mobility of the pyrolysis device, resulting in efficient conversion of agricultural waste, reducing environmental burden, and enabling resource utilization of waste. In-situ treatment allows for direct remediation of soils affected by continuous cropping in farmland, saving transportation costs. By reducing economic losses caused by continuous cropping obstacles and improving crop yield and quality, it brings direct economic benefits to farmers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the device structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the conveyor belt I structure of the present invention;

[0017] Figure 3 This is a partial structural diagram of conveyor belt I and conveyor belt II;

[0018] Figure 4 This is a schematic diagram of the combustion furnace structure;

[0019] Figure 5 This is a schematic diagram of the combustion furnace structure;

[0020] Figure 6 This is a schematic diagram of the combustion furnace structure;

[0021] Figure 7 This is a partial structural diagram of conveyor belt II and the combustion furnace;

[0022] Figure 8 This is a schematic diagram of the water vapor recovery mechanism.

[0023] In the diagram: 1-Walking mechanism, 2-Blower, 3-Power supply, 4-Combustion chamber, 5-Resistance wire layer, 6-Baffle, 7-Spare mesh, 8-Flue gas outlet I, 9-Insulation chamber, 10-Condensate outlet, 11-Support, 12-Condensate recovery pipe, 13-Flue gas outlet II, 14-Flue gas outlet III, 15-Pulverizer, 16-Conveyor belt II, 17-Conveyor belt I, 18-Plow bucket, 19-Combustion furnace, 20-Flue gas inlet, 21-Combustion furnace air inlet, 22-Screening outlet, 23-Combustion furnace material inlet, 24-Purification chamber, 25-Roller, 26-Exhaust fan. Detailed Implementation

[0024] The following examples further illustrate the content of the present invention, but these examples do not limit the scope of protection of the present invention. Unless otherwise specified, the methods in the examples are conventional methods, and unless otherwise specified, the reagents used are conventional commercial reagents or reagents prepared according to conventional methods.

[0025] Example 1: As Figure 1-8 As shown, this in-situ continuous cropping obstacle soil rapid remediation vehicle includes a soil collection and conveying mechanism, an air distribution mechanism, a combustion furnace 19, a crusher 15, a water vapor recovery mechanism, and a walking mechanism 1. The soil collection and conveying mechanism is installed at the front end of the walking mechanism 1 via a bracket. The combustion furnace 19, the air distribution mechanism, and the water vapor recovery mechanism are installed above the walking mechanism 1. The crusher 15 is located on top of the combustion furnace 19. The air distribution mechanism is a blower 2, and the power source is a power supply 3.

[0026] The combustion furnace 19 includes an outer shell and an inner shell. The inner cavity of the inner shell is a combustion chamber 4, which is equipped with a partition mesh 7 and two or more layers of resistance wire 5. The cavity between the outer shell and the inner shell is a heat preservation chamber 9. The outer shell has a combustion furnace air inlet 21, a screening material outlet 22, and a fuel addition port, which are connected to the combustion chamber. The inner shell has a flue gas outlet I 8, which is connected to the heat preservation chamber 9. The outer shell has a flue gas outlet II 13, which is connected to a water vapor recovery mechanism through a pipe. The top of the outer shell has a combustion furnace material inlet 23, which is connected to the combustion chamber. The discharge port of the crusher 15 is connected to the combustion furnace material inlet 23. The bottom of the combustion furnace 19 has an outlet.

[0027] The soil collection and conveying mechanism includes a plow bucket 18, a conveyor belt II 16, and a conveyor belt I 17. The plow bucket 18 is located at the front end of the conveyor belt I 17. A roller 25 is provided between the plow bucket and the conveyor belt I. The rear end of the conveyor belt I 17 is located above the feed inlet of the crusher 15. The conveyor belt II 16 is fixed to one side of the combustion furnace 19 by a bracket 11. One end of the conveyor belt II 16 passes through the screen outlet and is located below the material inlet 23 of the combustion furnace. The other end of the conveyor belt II 16 extends above the conveyor belt I 17 and is provided with a baffle 6 on one side. The walking mechanism is a crawler type walking mechanism. The conveyor belt II 16 is a hollow conveyor belt with a hole diameter of 8cm.

[0028] The water vapor recovery mechanism includes a shell, which is divided into a condensation recovery chamber and a purification chamber. A condensation recovery pipe 12 is installed in the condensation recovery chamber. The condensation recovery pipe is a serpentine bend. The bottom of the condensation recovery chamber is connected to the bottom of the purification chamber. The bottom of the condensation recovery chamber is connected to the condensate outlet 10. Several baffles are arranged alternately and asymmetrically in the purification chamber, and adsorbent is placed between the baffles. A flue gas inlet 20 is opened on one side of the top of the condensation recovery chamber, and a flue gas outlet Ⅲ14 is opened on the top of the purification chamber.

[0029] When the above-mentioned device is in use, the soil to be remediated and the organic matter in the soil are collected by the plow bucket 18 and then conveyed to the crusher 15 by the conveyor belt I 17 for crushing. The crushed soil falls onto the conveyor belt II 16, which has a screening function. Small particles enter the combustion chamber 4, while large particles are sent by the conveyor belt II 16 to the conveyor belt I 17 for further crushing. The crushed material entering the combustion chamber 4 falls onto the partition screen 7, where it is heated by the resistance wire layer 5 and the air distribution from the blower, achieving stratified combustion at 500°C. When it is necessary to add organic materials, biomass is added through the fuel addition port. Fuel assists combustion, and organic materials in the combustion chamber are ignited to provide a heat source. After combustion, the combustion products are discharged to the field surface through the bottom outlet of the combustion furnace. The gas generated by combustion enters the insulation chamber 9 from the flue gas outlet I8 under the action of the exhaust fan 26, and then enters the condensation recovery chamber of the water vapor recovery mechanism from the flue gas outlet II13. The flue gas passes through the condensation recovery pipe 12 from top to bottom to condense and recover the moisture in the flue gas. The condensate is discharged from the condensate outlet 10 and reused in the field soil. When the flue gas reaches the bottom, it enters the purification chamber 24, where it is purified under the action of the adsorbent (granular activated carbon) and discharged from the flue gas outlet III14.

[0030] The concentration of VOCs in the flue gas entering the water vapor recovery unit was measured to be 30.2 mg / m³. 3 The VOCs concentration in the flue gas discharged from flue gas outlet Ⅲ14 was 1.58 mg / m³. 3 .

[0031] Example 2: The device structure in this example is the same as in Example 1, except that it also includes a PLC controller. The power source is connected to the walking mechanism, crusher, air distribution mechanism, and resistance wire layer through the controller. A portable high-flow automatic tester is used for flue gas emission detection. The blower outlet is connected to a jet pipe installed in the air inlet 21 of the combustion furnace. The jet pipe forms a 25° angle with the horizontal plane. The angle of the jet pipe is adjustable to control the formation, direction, and intensity of the air duct inside the furnace to prevent flue gas from leaking out from non-target outlets. The direction can be controlled to direct the flow of flue gas to the outlet. When the jet pipe is directly facing the flue gas outlet... When the gas outlet I8 blows air at a 25° angle, it works in conjunction with the exhaust fan 26 to create a flue gas flow inside the furnace. Simultaneously, it controls the positive pressure inside the furnace and the local negative pressure environment at the flue gas outlet. When only the exhaust fan 26 is turned off, a positive pressure environment is created inside the furnace, which can be used for furnace cleaning during shutdown. When only the blower 26 is turned off, a negative pressure environment is created inside the furnace, which can be used to guide the exhaust gas out of the furnace. When combustion inside the furnace is incomplete and the excess air coefficient is low, the angle of the jet pipe can be adjusted while the blower speed is reduced to allow more air to be blown directly into the furnace. The lower wind speed avoids damaging the air duct, and in this case, the air duct is mainly guided by the exhaust fan. During normal operation (i.e., when both the blower and exhaust fan are turned on), with the blower supplying air and the exhaust fan drawing air in, and the air duct unobstructed, the hot flue gas, which is lighter than air, flows into the flue gas outlet I and will not leak from the bottom outlet of the combustion furnace. The adsorbent used in this embodiment is granular activated carbon.

[0032] The device used in this embodiment is the same as in Embodiment 1. The concentration of VOCs in the flue gas entering the water vapor recovery mechanism was measured to be 31.2 mg / m³. 3 The VOCs concentration in the flue gas discharged from flue gas outlet Ⅲ14 was 1.61 mg / m³. 3 .

[0033] This continuous cropping obstacle soil remediation vehicle can be used with various vehicles, offering wide applicability while allowing for the selection of environmentally friendly power sources tailored to local conditions, reducing energy consumption and environmental pollution. Furthermore, the vehicle employs a modular and lightweight design, reducing its weight and improving energy efficiency. Required modules can be selected based on specific application requirements. Organic waste is added as a heat source during the pyrolysis process, achieving waste-to-waste conversion, saving energy, and providing a new outlet for rural waste treatment and disposal. Compared to other remediation methods, it is more energy-efficient and environmentally friendly.

Claims

1. A rapid remediation vehicle for in situ replant barrier soils, characterized by: The soil collecting and conveying mechanism, the air distribution mechanism, the combustion furnace (19), the pulverizer (15), the water vapor recovery mechanism, and the walking mechanism (1) are arranged in sequence. The combustion furnace (19) comprises an outer shell and an inner shell, the inner cavity of the inner shell is a combustion chamber (4), the combustion chamber (4) is provided with a screen (7) and one or more layers of resistance wire layers (5), the cavity between the outer shell and the inner shell is a heat preservation chamber (9), the outer shell is provided with a combustion furnace air inlet (21), a screening outlet (22), and a fuel adding port, which are communicated with the combustion chamber, the inner shell is provided with a flue gas outlet I (8) communicated with the heat preservation chamber (9), the outer shell is provided with a flue gas outlet II (13) communicated with the water vapor recovery mechanism through a pipeline, the outer shell is provided with a combustion furnace material inlet (23) at the top communicated with the combustion chamber, the discharge port of the pulverizer (15) is communicated with the combustion furnace material inlet (23), and the bottom of the combustion furnace (19) is provided with an outlet. The soil collecting and conveying mechanism comprises a plow blade bucket (18), a conveying belt II (16), and a conveying belt I (17), the plow blade bucket (18) is arranged at the front end of the conveying belt I (17), the rear end of the conveying belt I (17) is located above the feeding port of the pulverizer (15), the conveying belt II (16) is fixed on one side of the combustion furnace (19) through a support, one end of the conveying belt II (16) passes through the screening outlet and is arranged below the combustion furnace material inlet (23), and the other end of the conveying belt II (16) extends above the conveying belt I (17) and is provided with a baffle (6) on one side. The water vapor recovery mechanism comprises a shell, which is divided into a condensation recovery cavity and a purification cavity, the condensation recovery cavity is provided with a condensation recovery pipe, the condensation recovery pipe is a serpentine pipe, the bottom of the condensation recovery cavity is communicated with the bottom of the purification cavity, the bottom of the condensation recovery cavity is communicated with a condensate water outlet (10), and the purification cavity is alternately and asymmetrically provided with a plurality of baffle plates and is provided with an adsorbent between the baffle plates; the top of the condensation recovery cavity is provided with a flue gas inlet (20) on one side, and the top of the purification cavity is provided with a flue gas outlet III (14).

2. The in situ, companion-hindered soil quick remediation vehicle of claim 1, wherein: The power source and the controller are further included, and the power source is connected with the walking mechanism, the pulverizer, the air distribution mechanism, and the resistance wire layer through the controller.

3. The in situ, companion-hindered soil quick remediation vehicle of claim 1, wherein: The walking mechanism is a caterpillar walking mechanism, and the conveying belt II (16) is a hollow conveying belt, the diameter of the holes in the conveying belt II (16) is 6-9 cm.

4. The in situ, companion-hindered soil quick remediation vehicle of claim 1, wherein: The air distribution mechanism is a blower, the outlet of the blower is connected with a jet pipe arranged in the combustion furnace air inlet (21), and the jet pipe forms an angle of 0-30° with the horizontal plane.

5. The in situ, companion-hindered soil quick remediation vehicle of claim 1, wherein: Rollers (25) are arranged between the plow blade bucket and the conveying belt I.

6. The in situ, companion-hindered soil quick remediation vehicle of claim 1, wherein: The soil and organic matter to be repaired are collected by the plough blade bucket (18) and transported to the pulverizer (15) by the conveying belt I (17) for crushing. The crushed soil falls to the conveying belt II (16), and the small particle mixture enters the combustion chamber (4), while the large particle mixture is sent back to the conveying belt I (17) to be crushed again. The conveying belt II (16) plays a role of screening. The crushed material entering the combustion chamber (4) falls on the separation net (7) to realize layered combustion. When it is necessary to supplement the addition of organic material, biomass fuel is added through the fuel adding port to assist combustion. The organic material in the combustion chamber is ignited to provide heat source. After the combustion is completed, the combustion products are discharged to the ground through the bottom outlet of the combustion furnace. The gas generated by the combustion enters the heat preservation chamber (9) from the flue gas outlet I (8), and then enters the water vapor recovery mechanism from the flue gas outlet II (13). The flue gas passes through the condensation recovery pipe in the water vapor recovery mechanism from top to bottom to recover water. The condensed water is discharged from the condensate water outlet (10) to be reused in the field. The flue gas reaches the bottom and enters the purification chamber (24), and is discharged from the flue gas outlet III (14).

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