Soil remediation apparatus using straw combustion

Abstract

The present application relates to the technical field of soil remediation, and in particular to a soil remediation device using straw combustion, which comprises a stock bin, a soil particle heating circulation line, a soil particle feeding and conveying line, a straw mesh belt conveyor, a dust receiving mesh belt conveyor, a soil particle discharging and conveying line, and an air blower. The device uses high-temperature flue gas generated by the combustion of straw fragments to heat relatively dispersed and spread soil particles conveyed by the soil particle heating circulation line, and the soil particles also have a rolling effect, so that the soil particles are fully roasted by the high-temperature flue gas, and the desorption and oxidation of organic matter in the soil particles are realized. After passing through the heating zone, the high-temperature flue gas continues to rise, so that the flue gas generated by the combustion of the straw and the volatilized organic matter are subjected to double adsorption and filtration by the straw fragments in the straw cavity and the soil particles in the soil particle cavity. The straw fragments and the soil particles that have adsorbed the organic matter are combusted and oxidized again in the process of soil particle heating in the straw combustion and heating zone, so that the problems of straw treatment and contaminated soil are 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 combustion. Background Art

[0002] With the acceleration of industrialization and urbanization, a certain proportion of existing arable land is polluted to varying degrees. The sources of soil organic pollutants are wide-ranging, mainly 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. Some methods also require adding various chemical reagents to the soil, such as chemical oxidation, which will bring about residues of various chemical reagents and affect the normal use of the soil. Some methods also require a lot of energy consumption, such as heating treatment, which requires 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 combustion 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 having a fixed partition inside, the partition dividing the interior of the silo into a straw chamber for accommodating straw and a soil chamber for accommodating soil particles, the bottom of the silo having a smoke collecting chamber located below the straw chamber and opening downward; a connecting hole is formed at the upper end of the partition, through which the straw chamber is connected to the soil chamber; an air vent is penetrated downward through the bottom of the straw chamber and connected to the smoke collecting chamber; and an exhaust port is connected to the lower end of the soil chamber;

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

[0008] A soil particle feeding conveyor line is provided above the feeding area. The lower end of the soil particle cavity is connected to 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 to supply the soil particles to the 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 conveyor line is set 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 to the exhaust port.

[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 trajectory, and the transfer buckets are provided in a transfer trough with 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 left; the notches of the transfer buckets in the discharging area are all facing right, 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 the 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, thereby achieving the desorption and oxidation of organic matter in the soil particles, 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 heats and the straw burns, 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 heat 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 will be further described below with reference to the accompanying drawings and examples.

[0033] Figure 1 Schematic diagram of a soil remediation device utilizing straw combustion 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 cooperation between the sprocket group 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, deflector 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 assembly, 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 conveying 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 illustrate the basic structure of the present invention only in a schematic manner. Therefore, they only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended 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 mutually isolated straw chamber 12 for accommodating straw and a soil particle chamber 13 for accommodating soil particles. 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 can be in a conical 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, and the straw chamber 12 is connected to the soil particle chamber 13 through the connecting hole 11-1. A filter can be installed in the connecting hole 11-1. The mesh diameter of the filter 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 by the smoke from the connecting hole 11-1; an air vent 12-1 communicating with the smoke collecting chamber 14 is penetrated downward from the bottom of the straw chamber 12, and 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 to the exhaust port 13-1;

[0050] The soil particle heating circulation line has a circulating soil particle conveyor belt 2. 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 circulating motion trajectory. The smoke collecting chamber 14 is located directly above the heating area 2c.

[0051] The soil particle loading conveying line 3 is arranged above the loading area 2a, and can adopt a belt conveyor, and the lower end of the soil particle cavity 13 is communicated with a soil particle loading pipe 13-2, the soil particle loading conveying line 3 is used for receiving the soil particles falling from the soil particle loading pipe 13-2, and is used for supplying the soil particles to the loading area 2a;

[0052] The straw mesh belt conveyor 4 is used for receiving the straw falling from the straw loading pipe 12-2, the straw loading pipe 12-2 is communicated with the lower end of the straw cavity 12, and is arranged 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 below the heating area 2c, and the straw mesh belt conveyor 4 is used for conveying the 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 for receiving the soil particles falling from the discharging area 2d;

[0055] The air inlet of the induced draft fan 7 is communicated with the exhaust port 13-1, and a filter assembly can be arranged at the exhaust port 13-1, the filter assembly has a filter hole with a diameter smaller than the particle size of the soil particles, and the filter assembly can specifically adopt a dust removal filter bag.

[0056] In the embodiment, the straw fragments in the straw cavity 12 fall from the straw loading pipe 12-2 to the straw mesh belt conveyor 4, the straw mesh belt conveyor 4 conveys the straw fragments to the ash receiving mesh belt conveyor 5, and the straw fragments are combusted on the ash receiving mesh belt conveyor 5; at the same time, the soil particles in the soil particle cavity 13 fall from the straw loading pipe 12-2 to the soil particle loading conveying line 3, the soil particle loading conveying line 3 conveys the soil particles to the loading area 2a of the soil particle heating circulating line, the high-temperature flue gas generated by the combustion of the straw fragments on the ash receiving mesh belt conveyor 5 passes through the heating area 2c upwards, and heats the soil particles reaching the heating area 2c, so that the soil particles are baked by high temperature, and the organic matter in the soil particles is desorbed and oxidized;

[0057] Moreover, the high-temperature flue gas continues to rise after passing through the heating area 2c, and then passes through the smoke collecting cavity 14, the air permeable hole 12-1, the straw cavity 12, the communication hole 11-1, the soil particle cavity 13 and the exhaust port 13-1 in turn, and is finally extracted by the induced draft fan 7 and discharged from the air outlet of the induced draft fan 7, the flue gas of the straw combustion and the volatilized organic matter are double-absorbed and filtered by the straw fragments in the straw cavity 12 and the soil particles in the soil particle cavity 13, and the straw fragments and the soil particles absorbing the organic matter are combusted and oxidized again in the process of the straw combustion and the soil particle heating in the heating area 2c;

[0058] The straw ash formed by the straw combustion can be mixed with the treated soil particles, so as to promote the fluffiness of the soil particles, increase the voids, and make the soil particles can 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 vibrate the silo 1, which is conducive to the straw fragments and soil particles falling 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 collection chamber 14. 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 trajectory. The transfer buckets 21 are provided in a transfer trough 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 hoppers 21 in the loading area 2a and the heating area 2c are all facing left; the notches 212 of the transfer hoppers 21 in the discharge area 2d are all facing right, and the discharge area 2d is tilted rightward from top to bottom;

[0066] The soil particles transported from the output end of the soil particle feeding conveyor line 3 will fall into the feeding area 2a of the inner ring wall of the soil particle conveyor belt 2. The soil particles and the feeding area 2a will move to the left together, and then reach the heating area 2c of the inner ring 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 effect 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. 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, with chains 2-2 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 sprockets 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 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 groups 2-1, and the sprocket group 2-1 is composed of two coaxially fixed and spaced sprockets 2-11. Two sprockets 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 engaged with the chains 2-2 on both sides of the chain 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 zone 2c. The inner ring wall of the soil particle conveyor belt 2 is arranged horizontally in the heating zone 2c to facilitate relatively uniform dispersion of the soil particles in the heating zone 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 discharging 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 amount of kinetic energy, which enables the soil particles to tumble 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 enable the soil particles in the soil particle cavity 13 to 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 can 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 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 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 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, generating smoke that directly reaches the heating zone 2c. The straw ash produced by the combustion can be transported in real time by the ash receiving mesh belt conveyor 5 to the end away from the combustion zone 51 and fall.

[0082] The soil particles in the soil particle cavity 13 fall from the straw drop pipe 12-2 onto the soil particle feeding conveyor line 3. 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 passes upward through the heating area 2c, heating the soil particles arriving at the heating area 2c, so that the soil particles are baked at high temperature, thereby achieving the desorption and oxidation of organic matter in the soil particles. In addition, when the soil particles in the higher feeding area 2a reach the lower heating area 2c, they have a certain kinetic energy, which enables the soil particles to roll in the heating area 2c.

[0083] After passing through the heating zone 2c, the high-temperature flue gas continues to rise and then passes 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 is finally drawn 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 straw combustion 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 straw combustion and soil particle heating process 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 planting use.

[0085] The above description of the preferred embodiments of the present invention is intended to serve as a guide. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A soil remediation device using straw combustion, characterized by: include: A silo (1) having a fixed partition (11) therein, wherein the partition (11) divides 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), and the straw chamber (12) is connected to the soil chamber (13) through the connecting hole (11-1). An air vent (12-1) is passed downward through the bottom of the straw chamber (12) and is 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 has a soil particle conveyor belt (2) that moves in a circular 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 circular motion trajectory, and the smoke collecting chamber (14) is located directly above the heating area (2c); A soil particle feeding conveyor line (3) is provided 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); An 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 provided 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 connected to the exhaust port (13-1); The inner ring 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 ring wall of the soil particle conveyor belt (2) is provided with a plurality of transfer buckets (21) at intervals along the circular motion trajectory, and the transfer buckets (21) are provided in a transfer trough (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 inside 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 buckets (21) in the loading area (2a) and the heating area (2c) are both oriented to the left; the notches (212) of the transfer buckets (21) in the discharge area (2d) are both oriented to the right, and the discharge area (2d) is tilted to the right from top to bottom.

2. The soil remediation device using straw combustion according to claim 1, 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 combustion according to claim 1, 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, and the cross-sectional area of ​​the flow guide chamber gradually increases from top to bottom.

4. The soil remediation device using straw combustion according to claim 1, 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).

5. The soil remediation device using straw combustion according to claim 4, 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 leftward 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).

6. The soil remediation device using straw combustion according to claim 4, characterized in that: The soil particle discharge pipe (13-2) is provided with a discharge valve (13-21).

7. The soil remediation device using straw combustion 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).

8. The soil remediation device using straw combustion according to claim 7, 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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