Soil remediation device utilizing straw combustion

Abstract

The invention relates to the technical field of soil remediation, in particular to a soil remediation device utilizing straw combustion. The soil remediation device comprises a stock bin, a soil particle heating circulation line, a soil particle feeding conveying line, a straw mesh belt conveyor, an ash receiving mesh belt conveyor, a soil particle discharging conveying line and an induced draft fan. Relatively dispersed and spread soil particles conveyed by a soil particle heating circulation line are heated by high-temperature flue gas generated by combustion of crushed straw, the soil particles also have a rolling effect, so that the soil particles are fully baked by the high-temperature flue gas, desorption and oxidation of organic matters in the soil particles are realized, the high-temperature flue gas continues to rise after passing through a heating area, and the organic matters in the soil particles are fully heated by the high-temperature flue gas; smoke generated by straw combustion and volatilized organic matter are subjected to double adsorption filtration of straw crushed aggregates in the straw cavity and soil particles in the soil particle cavity, and the straw crushed aggregates and the soil particles adsorbing the organic matter are combusted and oxidized again in the straw combustion and soil particle heating process of the heating area, so that the problem of straw treatment is solved; and the problem of soil pollution is also solved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation, and in particular to a soil remediation device utilizing straw burning. Background Art

[0002] With the acceleration of industrialization and urbanization, a certain proportion of the existing cultivated land is polluted to varying degrees. The sources of soil organic pollutants are wide-ranging, including the following categories: 1) Polycyclic aromatic hydrocarbons (PAHs): mainly from the incomplete combustion of mineral fuels, wood and other hydrocarbons, as well as the accumulation of pesticides and organic waste; 2) Organic halides: the most important organic pollutants in agricultural soil, with a wide range of sources; 3) Phthalates: widely used polymer material additives in industry, added in an amount of 20%-60% in the plastic production process; in addition, there is chemically contaminated soil, which is closely related to the products produced by the chemical industry.

[0003] These organic pollutants will change the physical and chemical properties of the soil and destroy the local ecosystem. Traditional control technologies, such as biological methods, require years of plant restoration, and the effects are difficult to control. There is also a need to add various chemical reagents to the soil. For example, chemical oxidation methods will leave residues of various chemical reagents and affect the normal use of the soil. Some methods require a lot of energy consumption, such as heating treatment methods, which require electricity or coal to provide heat. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem of long soil treatment cycle or easy chemical reagent residue in the prior art, a soil remediation device using straw burning is provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a soil remediation device using straw combustion, comprising:

[0006] A silo, with a partition fixed inside, the partition dividing the interior of the silo into a straw cavity for accommodating straw and a soil cavity for accommodating soil particles, which are isolated from each other; the bottom of the silo has a smoke collecting cavity located below the straw cavity and opening downward; a connecting hole is provided at the upper end of the partition, and the straw cavity is connected with the soil cavity through the connecting hole; an air vent is penetrated downward from the bottom of the straw cavity and connected with the smoke collecting cavity; the lower end of the soil cavity is connected with an exhaust port;

[0007] The soil particle heating circulation line has a soil particle conveyor belt that circulates, and the soil particle conveyor belt is provided with a loading area, a heating area and a discharging area in sequence along the circulatory motion track, and the smoke collecting chamber is located directly above the heating area;

[0008] The soil particle feeding conveyor line is arranged above the feeding area, the lower end of the soil particle cavity is connected with a soil particle dropping pipe, the soil particle feeding conveyor line is used to receive the soil particles dropped from the soil particle dropping pipe, and is used to supply the soil particles to the upper feeding area;

[0009] A straw mesh belt conveyor is used to receive the straw dropped from the straw drop pipe, wherein the straw drop pipe is connected to the lower end of the straw cavity and is located above the straw mesh belt conveyor;

[0010] The ash receiving mesh belt conveyor is arranged below the straw mesh belt conveyor and below the heating zone, and the straw mesh belt conveyor is used to convey straw to the ash receiving mesh belt conveyor;

[0011] The soil particle discharging conveying line is arranged below the discharging area and is used to receive the soil particles falling from the discharging area;

[0012] and an induced draft fan, wherein the air inlet of the induced draft fan is connected with the air outlet.

[0013] Furthermore, the straw chamber is located on the left side of the silo, and the soil particle chamber is located on the right side of the silo;

[0014] The silo is fixed on the ground, and vibration motors are fixed on the left and right sides of the silo.

[0015] Furthermore, a flow guide cover located above the heating area is fixed to the bottom end of the smoke collecting chamber, and the inner wall of the flow guide cover encloses a flow guide chamber, and the cross-sectional area of ​​the flow guide chamber gradually increases from top to bottom.

[0016] Furthermore, the inner ring wall of the soil particle conveyor belt is provided with the loading area, heating area and discharging area in sequence along the circular motion trajectory;

[0017] The inner ring wall of the soil particle conveyor belt is provided with a plurality of transfer buckets at intervals along the circular motion track, and the transfer buckets are arranged in a transfer groove having a notch on one side;

[0018] The soil particle feeding conveyor line and the soil particle discharging conveyor line are both located on the inner side of the soil particle conveyor belt, and the soil particle feeding conveyor line is located above the heating zone, and the soil particle discharging conveyor line is located below the discharging zone;

[0019] The notches of the transfer buckets in the loading area and the heating area are all facing the left side; the notches of the transfer buckets in the discharging area are all facing the right side, and the discharging area is inclined to the right from top to bottom.

[0020] Furthermore, the soil particle conveyor belt passes through the driving wheel, the first guide wheel, the second guide wheel, the third guide wheel, the driven wheel, the fourth guide wheel and the fifth guide wheel in sequence along the circular motion trajectory, and the driving wheel is connected to the driven wheel through the soil particle conveyor belt;

[0021] The driving wheel, the second guide wheel, the third guide wheel, the driven wheel and the fourth guide wheel are all located on the inner side of the soil particle conveyor belt, and the first guide wheel and the fifth guide wheel are located on the outer side of the soil particle conveyor belt;

[0022] The area of ​​the soil particle conveyor belt between the driving wheel and the first guide wheel is the loading area;

[0023] The area of ​​the soil particle conveyor belt between the second guide wheel and the third guide wheel is a heating area;

[0024] The area of ​​the soil particle conveyor belt between the fourth guide wheel and the fifth guide wheel is a discharging area, and the driven wheel and the fifth guide wheel are both located below the fourth guide wheel.

[0025] Furthermore, the area of ​​the soil particle conveyor belt between the first guide wheel and the second guide wheel is a kinetic energy zone, the kinetic energy zone is inclined to the left from top to bottom, the second guide wheel and the third guide wheel are both located below the first guide wheel, and the height of the heating zone is lower than the height of the heating zone.

[0026] Furthermore, a discharge valve is provided on the soil particle discharge pipe.

[0027] Furthermore, the conveying direction of the ash receiving mesh belt conveyor is opposite to the conveying direction of the straw mesh belt conveyor.

[0028] Furthermore, one end of the ash receiving mesh belt conveyor close to the heating zone protrudes from the straw mesh belt conveyor, the area where the ash receiving mesh belt conveyor protrudes from the straw mesh belt conveyor is the combustion zone, and the heating zone is located directly above the combustion zone.

[0029] The beneficial effects of the present invention are as follows: the present invention utilizes the straw burning soil remediation device to heat the relatively dispersed and spread soil particles transported by the soil particle heating circulation line through the high-temperature flue gas generated by the burning of straw fragments, and the soil particles will also have a tumbling effect, so that the soil particles are fully baked by the high-temperature flue gas, and the desorption and oxidation of organic matter in the soil particles are achieved, and the high-temperature flue gas will continue to rise after passing through the heating zone, so that the straw burning flue gas and volatile organic matter are double-adsorbed and filtered by the straw fragments in the straw cavity and the soil particles in the soil particle cavity, and the straw fragments and soil particles that adsorb organic matter are burned and oxidized again during the straw burning and soil particle heating process in the heating zone, thereby solving both the problem of straw treatment and the problem of soil pollution.

[0030] In addition, the straw ash produced by combustion can be directly used to improve soil quality; the mass transfer and soil turning effects of the soil particle heating circulation line can be used to remove the heated soil particles at the bottom in time, and the treated flue gas can be adsorbed and treated by the soil and straw. As the soil is heated and the straw is burned, the adsorbed smoke and organic matter can re-enter the combustion stage and be oxidized, reducing air pollution; while purifying the flue gas, the soil and straw are heated, improving the thermal utilization efficiency.

[0031] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 is a schematic diagram of a soil remediation device utilizing straw burning according to the present invention;

[0034] Figure 2 This is the left schematic diagram of the coordination between the silo and the straw mesh belt conveyor and the ash mesh belt conveyor below;

[0035] Figure 3 It is a schematic diagram of the coordination between the sprocket set and the chain;

[0036] Figure 4 It is a three-dimensional schematic diagram of the transfer bucket.

[0037] In the figure: 1, silo, 11, partition, 11-1, connecting hole, 12, straw chamber, 12-1, air vent, 12-2, straw drop pipe, 13, soil particle chamber, 13-1, exhaust port, 13-2, soil particle drop pipe, 13-21, discharge valve, 14, smoke collection chamber, 15, guide cover;

[0038] 2. Soil particle conveyor belt, 2a. Loading area, 2b. Kinetic energy area, 2c. Heating area, 2d. Discharging area, 21. Transfer bucket, 211. Transfer trough, 212. Notch, 22. Driving wheel, 23. First guide wheel, 24. Second guide wheel, 25. Third guide wheel, 26. Driven wheel, 27. Fourth guide wheel, 28. Fifth guide wheel, 2-1. Sprocket set, 2-11. Sprocket, 2-2. Chain;

[0039] 3. Soil particle feeding conveyor line;

[0040] 4. Straw mesh belt conveyor;

[0041] 5. Ash receiving mesh belt conveyor, 51. Combustion area;

[0042] 6. Soil particle discharging conveyor line;

[0043] 7. Induced draft fan;

[0044] 8. Vibration motor;

[0045] 9. Pits. DETAILED DESCRIPTION

[0046] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0047] like Figure 1-4 As shown, a soil remediation device using straw combustion includes a silo 1, a soil particle heating circulation line, a soil particle feeding conveying line 3, a straw mesh belt conveyor 4, an ash receiving mesh belt conveyor 5, a soil particle discharging conveying line 6 and an induced draft fan 7;

[0048] A partition 11 is fixed inside the silo 1, and the partition 11 divides the interior of the silo 1 into a straw chamber 12 for accommodating straw and a soil particle chamber 13 for accommodating soil particles, which are isolated from each other. The straw in the straw chamber 12 is crushed straw fragments, for example, the length of the straw fragments is 20mm-30mm. A straw feeding port is provided at the upper end of the straw chamber 12, and a bin door is provided at the straw feeding port. When the bin door at the straw feeding port is opened, straw fragments can be added to the straw chamber 12 from the straw feeding port. After the addition is completed, the bin door at the straw feeding port is closed; the soil particles in the soil particle chamber 13 are screened soil particles of a certain particle size, and the moisture content of the soil particles is preferably less than 50%. A soil particle feeding port is provided at the upper end of the soil particle chamber 13, and a bin door is provided at the soil particle feeding port. When the bin door at the soil particle feeding port is opened, soil particles can be added to the soil particle chamber 13 from the soil particle feeding port. After the addition is completed, the bin door at the soil particle feeding port is closed;

[0049] The bottom of the silo 1 is provided with a smoke collecting chamber 14 located below the straw chamber 12 and opening downward. The smoke collecting chamber 14 may be in a cone shape with a small top and a large bottom, which is conducive to collecting the smoke generated by the burning of the straw below. A connecting hole 11-1 is provided at the upper end of the partition 11. The straw chamber 12 is connected to the soil particle chamber 13 through the connecting hole 11-1. A filter screen may be installed in the connecting hole 11-1. The mesh diameter of the filter screen in the connecting hole 11-1 is smaller than the length of the straw fragments. In this way, the straw fragments can be prevented from being carried into the soil particle chamber 13 from the connecting hole 11-1 by the smoke. An air vent 12-1 connected to the smoke collecting chamber 14 is penetrated downward from the bottom of the straw chamber 12. The aperture of the air vent 12-1 is smaller than the length of the straw fragments. The lower end of the soil particle chamber 13 is connected with an exhaust port 13-1.

[0050] The soil particle heating circulation line has a soil particle conveyor belt 2 that circulates. The soil particle conveyor belt 2 is provided with a loading area 2a, a heating area 2c and a discharging area 2d in sequence along the circulatory motion trajectory. The smoke collecting chamber 14 is located directly above the heating area 2c.

[0051] The soil particle feeding conveyor line 3 is arranged above the feeding area 2a. The soil particle feeding conveyor line 3 can adopt a belt conveyor. The lower end of the soil particle cavity 13 is connected with a soil particle dropping pipe 13-2. The soil particle feeding conveyor line 3 is used to receive the soil particles dropped from the soil particle dropping pipe 13-2 and to supply the soil particles to the upper feeding area 2a.

[0052] The straw mesh belt conveyor 4 is used to receive the straw dropped from the straw drop pipe 12 - 2 . The straw drop pipe 12 - 2 is connected to the lower end of the straw cavity 12 and is located above the straw mesh belt conveyor 4 .

[0053] The ash receiving mesh belt conveyor 5 is arranged below the straw mesh belt conveyor 4 and is located below the heating zone 2c. The straw mesh belt conveyor 4 is used to convey straw to the ash receiving mesh belt conveyor 5.

[0054] The soil particle discharging conveying line 6 is arranged below the discharging area 2d, and is used to receive the soil particles falling from the discharging area 2d;

[0055] The air inlet of the induced draft fan 7 is connected to the exhaust port 13-1. A filter assembly can be provided at the exhaust port 13-1. The filter hole diameter of the filter assembly is smaller than the particle diameter of the soil particles. The filter assembly can specifically adopt a dust removal filter bag.

[0056] In this embodiment, the straw fragments in the straw chamber 12 fall from the straw dropping pipe 12-2 onto the straw mesh belt conveyor 4, and the straw mesh belt conveyor 4 conveys the straw fragments to the ash receiving mesh belt conveyor 5, and burns on the ash receiving mesh belt conveyor 5; at the same time, the soil particles in the soil particle chamber 13 fall from the straw dropping pipe 12-2 onto the soil particle feeding conveyor line 3, and the soil particle feeding conveyor line 3 conveys the soil particles to the feeding area 2a of the soil particle heating circulation line, and the high-temperature flue gas generated by the combustion of the straw fragments on the ash receiving mesh belt conveyor 5 will pass upward through the heating area 2c, heat the soil particles reaching the heating area 2c, so that the soil particles are baked at high temperature, and the organic matter in the soil particles is desorbed and oxidized;

[0057] Moreover, the high-temperature flue gas will continue to rise after passing through the heating zone 2c and then pass through the smoke collecting chamber 14, the air vent 12-1, the straw chamber 12, the connecting hole 11-1, the soil particle chamber 13 and the exhaust port 13-1 in sequence, and finally be extracted by the induced draft fan 7 and discharged from the air outlet of the induced draft fan 7. The flue gas and volatile organic matter from the burning of straw are double-adsorbed and filtered by the straw fragments in the straw chamber 12 and the soil particles in the soil particle chamber 13. The straw fragments and soil particles that adsorb organic matter are burned and oxidized again during the process of burning straw and heating soil particles in the heating zone 2c.

[0058] The straw ash formed by burning the straw can be mixed with the processed soil particles to make the soil particles fluffy, increase the gaps, and allow the soil particles to be quickly put into use for planting.

[0059] In some examples, the straw chamber 12 is located on the left side of the silo 1 , and the soil particle chamber 13 is located on the right side of the silo 1 ;

[0060] The silo 1 is fixed on the ground, and vibration motors 8 are fixed on the left and right sides of the silo 1 . The vibration motors 8 cause the silo 1 to vibrate, which is beneficial for straw fragments and soil particles to fall from the silo 1 .

[0061] In some examples, a guide cover 15 located above the heating area 2c is fixed to the bottom end of the smoke collecting chamber 14, and the inner wall of the guide cover 15 encloses the guide chamber, and the cross-sectional area of ​​the guide chamber gradually increases from top to bottom. For example, the guide cover 15 is in the shape of a quadrangular pyramid, which can better collect smoke.

[0062] In some examples, the inner wall of the soil particle conveyor belt 2 is provided with a loading area 2a, a heating area 2c and a discharging area 2d in sequence along the circular motion trajectory;

[0063] The inner wall of the soil particle conveyor belt 2 is provided with a plurality of transfer buckets 21 at intervals along the circular motion track, and the transfer buckets 21 are arranged in a transfer groove 211 having a notch 212 on one side;

[0064] The soil particle feeding conveyor line 3 and the soil particle discharging conveyor line 6 are both located on the inner side of the soil particle conveyor belt 2, and the soil particle feeding conveyor line 3 is located above the heating area 2c, and the soil particle discharging conveyor line 6 is located below the discharging area 2d;

[0065] The notches 212 of the transfer buckets 21 in the loading area 2a and the heating area 2c are all facing the left side; the notches 212 of the transfer buckets 21 in the discharging area 2d are all facing the right side, and the discharging area 2d is inclined to the right from top to bottom;

[0066] The soil particles transported at the output end of the soil particle feeding conveyor line 3 will fall into the feeding area 2a of the inner wall of the soil particle conveyor belt 2, and the soil particles and the feeding area 2a will move to the left together, and then reach the heating area 2c of the inner wall of the soil particle conveyor belt 2. As the soil particle conveyor belt 2 runs, the soil particles will continue to roll, thereby improving the desorption and oxidation effects of organic matter. When the soil particles move from the heating area 2c to the bottom discharge area 2d, it is equivalent to an inclined upward movement. The soil particles will accumulate in the transfer groove 211 of the transfer bucket 21, and then at the discharge area 2d, since the discharge area 2d is tilted to the right from top to bottom, the slot 212 of the transfer bucket 21 at the discharge area 2d is tilted to the lower right, and the soil particles treated with high-temperature flue gas fall from the slot 212 of the transfer bucket 21 to the soil particle discharge conveyor line 6 under the action of gravity, and are output by the soil particle discharge conveyor line 6.

[0067] In some examples, the soil particle conveyor belt 2 passes through the driving wheel 22, the first guide wheel 23, the second guide wheel 24, the third guide wheel 25, the driven wheel 26, the fourth guide wheel 27 and the fifth guide wheel 28 in sequence along the circular motion trajectory, and the driving wheel 22 is connected to the driven wheel 26 through the soil particle conveyor belt 2;

[0068] For example, the soil particle conveyor belt 2 can be a chain conveyor belt, and chains 2-2 are fixed side by side on both sides of the chain conveyor belt. The driving wheel 22 and the driven wheel 26 are both coaxially fixed sprocket groups 2-1, and the sprocket group 2-1 is composed of two coaxially fixed and spaced sprockets 2-11. One end of the chain 2-2 on both sides of the chain conveyor belt is respectively connected to the two sprockets 2-11 of the driving wheel 22, and the other end of the chain 2-2 on both sides of the chain conveyor belt is respectively connected to the two sprockets 2-11 of the driven wheel 6. When the transfer bucket 21 passes through the sprocket group 2-1 with the chain conveyor belt, the transfer bucket 21 is located at the sprocket group 2-1. In the gap between the two sprocket wheels 2-11; the motor drives the driving wheel 22 to rotate through the reducer, and the driving wheel 22 drives the driven wheel 26 to rotate through the chains 2-2 on both sides of the chain plate conveyor belt. The first guide wheel 23, the second guide wheel 24, the third guide wheel 25, the fourth guide wheel 27 and the fifth guide wheel 28 can all be coaxially fixed sprocket wheel groups 2-1, and the sprocket wheel group 2-1 is composed of two coaxially fixed and spaced sprocket wheels 2-11. Two sprocket wheels 2-11 in the first guide wheel 23, the second guide wheel 24, the third guide wheel 25, the fourth guide wheel 27 and the fifth guide wheel 28 are meshed with the chains 2-2 on both sides of the chain plate conveyor belt.

[0069] The driving wheel 22, the second guide wheel 24, the third guide wheel 25, the driven wheel 26 and the fourth guide wheel 27 are all located on the inner side of the soil particle conveyor belt 2, and the first guide wheel 23 and the fifth guide wheel 28 are located on the outer side of the soil particle conveyor belt 2;

[0070] The area of ​​the soil particle conveyor belt 2 between the driving wheel 22 and the first guide wheel 23 is the loading area 2a, and the inner ring wall of the soil particle conveyor belt 2 is arranged in the horizontal direction at the loading area 2a;

[0071] The area of ​​the soil particle conveyor belt 2 between the second guide wheel 24 and the third guide wheel 25 is the heating area 2c. The inner ring wall of the soil particle conveyor belt 2 is arranged in the horizontal direction at the heating area 2c to facilitate the relatively uniform dispersion of the soil particles in the heating area 2c, so that the soil particles can be fully heated by the high-temperature flue gas.

[0072] The area of ​​the soil particle conveyor belt 2 between the fourth guide wheel 27 and the fifth guide wheel 28 is the discharge area 2d, and the driven wheel 26 and the fifth guide wheel 28 are both located below the fourth guide wheel 27.

[0073] In some examples, the area of ​​the soil particle conveyor belt 2 between the first guide wheel 23 and the second guide wheel 24 is the kinetic energy zone 2b, the kinetic energy zone 2b is inclined to the left from top to bottom, the second guide wheel 24 and the third guide wheel 25 are both located below the first guide wheel 23, and the height of the heating zone 2c is lower than the height of the heating zone 2c;

[0074] When the soil particles reach the heating zone 2c from the kinetic energy zone 2b, they have a certain kinetic energy, which enables the soil particles to present a tumbling effect in the heating zone 2c.

[0075] In some examples, a discharge valve 13-21 is provided on the soil particle discharge pipe 13-2. For example, the discharge valve 3-21 adopts a star-shaped discharger, which can make the soil particles in the soil particle cavity 13 reach the loading area 2a at a relatively uniform speed.

[0076] In some examples, the conveying direction of the ash receiving mesh belt conveyor 5 is opposite to the conveying direction of the straw mesh belt conveyor 4, and the mesh belts in the ash receiving mesh belt conveyor 5 and the straw mesh belt conveyor 4 may both be mesh belts;

[0077] One end of the ash receiving mesh belt conveyor 5 close to the heating zone 2c protrudes from the straw mesh belt conveyor 4. The area where the ash receiving mesh belt conveyor 5 protrudes from the straw mesh belt conveyor 4 is the combustion zone 51. The heating zone 2c is located directly above the combustion zone 51. In this way, the smoke generated by the combustion of straw fragments in the combustion zone 51 directly reaches the heating zone 2c upward, and the straw ash generated by the combustion can be transported to the end away from the combustion zone 51 by the ash receiving mesh belt conveyor 5 in real time and fall down.

[0078] The working principle of the soil remediation device using straw combustion is as follows:

[0079] The heating area 2c, the straw mesh belt conveyor 4, and the ash receiving mesh belt conveyor 5 are all arranged in a pit 9 on the ground;

[0080] The straw fragments are loaded into the straw cavity 12 and the soil particles are loaded into the soil particle cavity 13;

[0081] The straw fragments in the straw chamber 12 fall from the straw drop pipe 12-2 onto the straw mesh belt conveyor 4. The straw fragments burn in the combustion zone 51 to generate smoke that directly reaches the heating zone 2c. The straw ash generated by the combustion can be transported to the end away from the combustion zone 51 by the ash receiving mesh belt conveyor 5 in real time and falls.

[0082] The soil particles in the soil particle cavity 13 fall from the straw drop pipe 12-2 to the soil particle feeding conveyor line 3, and the soil particle feeding conveyor line 3 conveys the soil particles to the feeding area 2a of the soil particle heating circulation line. The high-temperature flue gas generated by the combustion of the straw fragments on the ash receiving mesh belt conveyor 5 will pass upward through the heating area 2c, and heat the soil particles reaching the heating area 2c, so that the soil particles are baked at high temperature, and the organic matter in the soil particles is desorbed and oxidized. Moreover, when the soil particles in the feeding area 2a with higher soil particles reach the lower heating area 2c, they have a certain kinetic energy, so that the soil particles can show a rolling effect in the heating area 2c;

[0083] After passing through the heating zone 2c, the high-temperature flue gas will continue to rise and then pass through the smoke collecting chamber 14, the air vent 12-1, the straw chamber 12, the connecting hole 11-1, the soil particle chamber 13 and the exhaust port 13-1 in sequence, and finally be extracted by the induced draft fan 7 and discharged from the air outlet of the induced draft fan 7. The flue gas and volatile organic matter from the burning of the straw are double-adsorbed and filtered by the straw fragments in the straw chamber 12 and the soil particles in the soil particle chamber 13. The straw fragments and soil particles that adsorb organic matter are burned and oxidized again during the process of burning the straw and heating the soil particles in the heating zone 2c.

[0084] The ash formed by burning straw can be mixed with processed soil particles to make the soil particles fluffy, increase the gaps, and allow the soil particles to be quickly put into use for planting.

[0085] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A soil remediation device using straw burning, characterized in that: include: A silo (1) having a partition (11) fixed therein, the partition (11) dividing the interior of the silo (1) into a straw chamber (12) for accommodating straw and a soil chamber (13) for accommodating soil particles, which are isolated from each other; the bottom of the silo (1) has a smoke collecting chamber (14) located below the straw chamber (12) and opening downward; a connecting hole (11-1) is provided at the upper end of the partition (11); the straw chamber (12) is connected to the soil chamber (13) through the connecting hole (11-1); an air vent (12-1) extending downward through the bottom of the straw chamber (12) and connected to the smoke collecting chamber (14); the lower end of the soil chamber (13) is connected to an exhaust port (13-1); A soil particle heating circulation line comprises a soil particle conveyor belt (2) that moves in a circulation motion, wherein the soil particle conveyor belt (2) is provided with a loading area (2a), a heating area (2c) and a discharging area (2d) in sequence along a circulation motion trajectory, and the smoke collecting chamber (14) is located directly above the heating area (2c); A soil particle feeding conveyor line (3) is arranged above the feeding area (2a); the lower end of the soil particle cavity (13) is connected to a soil particle dropping pipe (13-2); the soil particle feeding conveyor line (3) is used to receive soil particles dropped from the soil particle dropping pipe (13-2) and to supply soil particles to the feeding area (2a); A straw mesh belt conveyor (4) is used to receive the straw dropped from the straw dropping pipe (12-2), wherein the straw dropping pipe (12-2) is connected to the lower end of the straw cavity (12) and is located above the straw mesh belt conveyor (4); The ash receiving mesh belt conveyor (5) is arranged below the straw mesh belt conveyor (4) and is located below the heating zone (2c), and the straw mesh belt conveyor (4) is used to convey straw to the ash receiving mesh belt conveyor (5); A soil particle discharging conveying line (6) is arranged below the discharging area (2d) and is used to receive soil particles falling from the discharging area (2d); and an induced draft fan (7), wherein the air inlet of the induced draft fan (7) is in communication with the air outlet (13-1).

2. The soil remediation device using straw burning according to claim 1 is characterized in that: The straw chamber (12) is located on the left side of the silo (1), and the soil particle chamber (13) is located on the right side of the silo (1); The silo (1) is fixed on the ground, and vibration motors (8) are fixed on the left and right sides of the silo (1).

3. The soil remediation device using straw burning according to claim 1 is characterized in that: A flow guide cover (15) located above the heating zone (2c) is fixed to the bottom end of the smoke collecting chamber (14), and the inner wall of the flow guide cover (15) encloses a flow guide chamber, wherein the cross-sectional area of ​​the flow guide chamber gradually increases from top to bottom.

4. The soil remediation device using straw burning according to claim 1 is characterized in that: The inner wall of the soil particle conveyor belt (2) is provided with the loading area (2a), the heating area (2c) and the discharging area (2d) in sequence along the circular motion trajectory; The inner wall of the soil particle conveyor belt (2) is provided with a plurality of transfer buckets (21) at intervals along the circular motion track, and the transfer buckets (21) are arranged in a transfer groove (211) having a notch (212) on one side; The soil particle loading conveyor line (3) and the soil particle discharging conveyor line (6) are both located on the inner side of the soil particle conveyor belt (2), and the soil particle loading conveyor line (3) is located above the heating zone (2c), and the soil particle discharging conveyor line (6) is located below the discharging zone (2d); The notches (212) of the transfer bucket (21) at the loading zone (2a) and the heating zone (2c) are both facing left; the notches (212) of the transfer bucket (21) at the discharging zone (2d) are both facing right, and the discharging zone (2d) is inclined rightward from top to bottom.

5. The soil remediation device using straw burning according to claim 4 is characterized in that: The soil particle conveyor belt (2) passes through the driving wheel (22), the first guide wheel (23), the second guide wheel (24), the third guide wheel (25), the driven wheel (26), the fourth guide wheel (27) and the fifth guide wheel (28) in sequence along the circular motion trajectory, and the driving wheel (22) is connected to the driven wheel (26) through the soil particle conveyor belt (2); The driving wheel (22), the second guide wheel (24), the third guide wheel (25), the driven wheel (26) and the fourth guide wheel (27) are all located on the inner side of the soil particle conveyor belt (2), and the first guide wheel (23) and the fifth guide wheel (28) are located on the outer side of the soil particle conveyor belt (2); The area of ​​the soil particle conveyor belt (2) between the driving wheel (22) and the first guide wheel (23) is a loading area (2a); The area of ​​the soil particle conveyor belt (2) between the second guide wheel (24) and the third guide wheel (25) is a heating area (2c); The area of ​​the soil particle conveyor belt (2) between the fourth guide wheel (27) and the fifth guide wheel (28) is a discharge area (2d), and the driven wheel (26) and the fifth guide wheel (28) are both located below the fourth guide wheel (27).

6. The soil remediation device using straw burning according to claim 5 is characterized in that: The area of ​​the soil particle conveyor belt (2) between the first guide wheel (23) and the second guide wheel (24) is a kinetic energy zone (2b), the kinetic energy zone (2b) is inclined to the left from top to bottom, the second guide wheel (24) and the third guide wheel (25) are both located below the first guide wheel (23), and the height of the heating zone (2c) is lower than the height of the heating zone (2c).

7. The soil remediation device using straw burning according to claim 5 is characterized in that: The soil particle discharge pipe (13-2) is provided with a discharge valve (13-21).

8. The soil remediation device using straw burning according to claim 1, characterized in that: The conveying direction of the ash receiving mesh belt conveyor (5) is opposite to the conveying direction of the straw mesh belt conveyor (4).

9. The soil remediation device using straw burning according to claim 8, characterized in that: One end of the ash receiving mesh belt conveyor (5) close to the heating zone (2c) protrudes from the straw mesh belt conveyor (4); the area where the ash receiving mesh belt conveyor (5) protrudes from the straw mesh belt conveyor (4) is the combustion zone (51); and the heating zone (2c) is located directly above the combustion zone (51).

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