JP7017679B2 - Forced Ventilation for Restoring Organically Contaminated Soil-Spiral Stirring Heat Desorption Device - Google Patents

Description

The present invention relates to the technical field of organic contamination repair equipment, and specifically to a forced ventilation-spiral stirring heat desorption device for repairing organic contaminated soil.

In recent years, with the acceleration of industrialization and urbanization in China, coordination of city planning, urban expansion, functional zones, urban layout, and the relocation of many polluted companies, many polluted industrial lands have been left behind, resulting in environmental pollution. Accidents and damage to human health are major factors limiting the development and use of urban land. According to the survey, pollutants from the transfer sites of polluted companies mainly include organic pollutants and heavy metals, among which volatile / semi-volatile organic pollutants have a great impact on the ecological environment and human health.

The thermal desorption method is a method for repairing volatile / semi-volatile organic pollutants on industrial land. By heating the contaminated soil, the contaminated soil can be heated to a sufficient temperature, and volatile / semi-volatile organic pollutants can be volatilized and separated from the soil to purify the soil. Compared to other technologies, the thermal desorption method has the advantages of high efficiency, high speed and safety. The key to the repair effect of the heat desorption device is to provide a sufficiently high heating temperature and to be able to quickly separate pollutants in the volatile gaseous state from the soil.

However, the existing organically contaminated soil thermal decomposition repair equipment has a complicated equipment structure and a large area.
It is not useful for maintenance and use, the heating effect of contaminated soil is not ideal, pollutants with a high boiling point in the soil are difficult to volatilize and remove, exhaust gas treatment is not thorough, and it is secondary to the environment. There are drawbacks such as causing damage.

Considering the above-mentioned existing technical problems, the present invention provides a forced ventilation-spiral stirring heat desorption device for repairing organically contaminated soil, which has a remarkable treatment repair effect.

The technical solution of the present invention is as follows.
Forced Ventilation for Restoring Organically Contaminated Soil-Spiral Stirring Heat Desorption Equipment
It is equipped with a pyrolysis cylinder mounted on the pedestal, a spiral agitator mounted inside the pyrolysis cylinder, and a first motor mounted on the pedestal via the motor base and connected to the spiral agitator via a speed reducer. , A salary hopper for putting organically contaminated soil into the pyrolysis cylinder, and a discharge hopper for discharging the pyrolyzed organically contaminated soil are provided, and an electric heating tube is fitted in the inner wall of the pyrolysis cylinder, spiraling. The agitator includes a hollow stirring shaft and a spiral stirring pyrolyzer for stirring organically contaminated soil mounted on a pedestal, including a spiral blade attached to the stirring shaft.
It includes an air heating tube mounted inside the stirring shaft and a blower attached to the thermal decomposition tube and connected to the air heating tube, and the stirring shaft is provided with a gas nozzle for communicating the air heating tube and the thermal decomposition tube. , A preheated ventilation unit attached to the spiral stirring thermal decomposition unit to heat organically contaminated soil,
The processing box mounted on the pedestal, the gas homogenizing plate attached to the bottom of the processing box and connected to the thermal decomposition cylinder via a pipe, and the gas homogenizing plate mounted inside the processing box and located at the top of the gas homogenizing plate. A plurality of air ducts are uniformly provided on the upper end surface of the gas homogenizing plate, including a spray thrower, a gas adsorption frame mounted on the top of the treatment box, and an inductive draft fan mounted on the top of the treatment box. , The spray thrower includes a water storage tray and a spray pipe, the water storage tray is connected to an external water source, the water storage tray is provided with a through hole, the spray pipe is provided on the lower end surface of the water storage tray, its number and position are air ducts. One-to-one correspondence, the adsorption frame is filled with the adsorbent, and the exhaust gas treatment unit that is attached to the pedestal and communicates with the spiral stirring thermal decomposition unit.
It is mounted on a pedestal and includes an electric heating tube, a first motor, an air heating tube, a blower and a control unit for controlling the operation of an inductive draft fan.

As one aspect of the present invention, the pyrolysis cylinder is provided with a soil preheating unit, the soil preheating unit includes a preheating cylinder and an electric heating rod, a passage is provided at a connection portion between the preheating cylinder and the pyrolysis cylinder, and the inside of the preheating cylinder is provided. A first partition plate is provided at the left end of the, and the electric heating rod is rotatably engaged inside the preheating cylinder, penetrates the first partition plate, and a plurality of heating fins are uniformly arranged in the circumferential direction of the electric heating rod. Provided in
An arcuate shovel plate is provided at one end of the heating fin away from the electric heating rod, a first pulley is provided at the left end of the electric heating rod, and a second partition plate is provided at the left end inside the pyrolysis cylinder. The stirring shaft penetrates the second partition plate, a second pulley is provided on the left side of the second partition plate, the second pulley and the first pulley are driven by a belt, and the pay hopper is via a bracket. Because it is fixedly connected to the pedestal and the salary hopper communicates with the preheating cylinder,
The organically contaminated soil is preheated by the soil preheating part, the water in the soil is effectively evaporated, the soil is prevented from adhering to the cluster, the soil heating effect is enhanced, and the thermal decomposition efficiency of the organically contaminated soil is improved. Can be done.

Particularly suitable are four soil preheating sections, a mounting frame rotatably engaged to the outer wall of the thermal decomposition cylinder, one end of the thermal decomposition cylinder connected to the motor base, and the other end a support plate. It is connected to the pedestal via the pedestal, and the four preheating parts are evenly distributed on the outer circumference of the thermal decomposition cylinder and are fixedly connected to the mounting frame. A rotary salary plate is provided at the connection with the thermal decomposition cylinder, annular gears are provided at both ends of the mounting frame, and second motors and mounting plates are provided on both sides of the upper end surface of the pedestal, respectively. The gears are rotatably engaged to the plate, the gears are meshed and connected to the annular gears, and the second motor powers the gears, so the four soil preheaters rotate the mounting frame by the second motor. When the soil in the soil preheating section is heated and rotated to the top of the thermal decomposition tube, it enters the thermal decomposition tube through the rotary salary plate and the contaminated soil per unit time of the device is rotated. Not only can the treatment amount be increased, but also the heating of the organically contaminated soil becomes more complete, and the efficiency of removing organic pollutants in the soil can be improved.

In one aspect of the invention, the spray pipe is rotatably engaged with the water storage tray, a rotating blade is provided at the top of the spray pipe, and the spray pipe is fitted outside the air duct.
Since the inner wall of the spray pipe is hollow and a spray hole is provided, when an external water flow enters the water storage tray, the rotating blade rotates the spray pipe under the action of water flow disturbance.
Exhaust gas discharged from the air duct can be cleaned more comprehensively.

As one aspect of the present invention, a cleaning scraper is provided on the stirring shaft, and the cleaning scraper comes into contact with the inner wall of the pyrolysis cylinder. Therefore, by installing the cleaning scraper, the cleaning scraper can be thermally decomposed while the stirring shaft is rotating. It can rotate in close contact with the inner wall of the cylinder, clean the soil adhering to the pyrolysis cylinder, increase the heat transfer efficiency of the electric heating tube, and promote the complete volatilization of organic contaminants in the soil.

As one aspect of the present invention, since a heat exchanger and a bag-type dust remover are sequentially connected to the pipe, the heat in the exhaust gas is recovered and utilized by the heat exchanger, and the organic contaminants in the exhaust gas are desorbed. The bag-type dust remover can clean the particulate impurities in the exhaust gas and reduce the load on the subsequent equipment.

The operating principle of the present invention is as follows. The electric heating tube, first motor, second motor, air heating tube, blower, and induction draft fan of this device are connected to external power supplies, respectively.
The controller controls and starts the electric heating tube, the first motor, the air heating tube and the blower.
The washed organic contaminated soil is put into one preheating cylinder from the salary hopper, and the organic contaminated soil is preheated and agitated by the electric heating rod, the heating fin and the arc-shaped shovel plate in the preheating cylinder.
While stirring the soil, move to the left side of the preheating tube and enter the pyrolysis tube through the rotary pay plate.
The controller controls and starts the second motor, closes the sliding sealing plate on the corresponding preheater, rotates the mounting frame by the second motor, and the contaminated soil enters the next preheater through the payroll hopper. , Finally enter the pyrolysis cylinder through the rotary salary plate,
The organically contaminated soil in the pyrolysis cylinder continuously moves to the discharge hopper under the action of a stirring spiral.
The contaminated soil is reheated by the electric heating tube, and the air heated by the air heating tube is blown into the contaminated soil from the gas nozzle by the blower.
The induction draft fan is controlled and started by the controller, the heat-decomposed soil is discharged from the discharge hopper to the heat-decomposition cylinder, and the exhaust gas generated during the heat-decomposition is discharged through the pipe to the heat exchanger and the bag-type dust remover. When the exhaust gas through the gas homogenizing plate overflows from each air duct and the external detergent is supplied to the water storage tray, the rotating blades blow the spray pipe under the action of water flow disturbance. It is rotated and the organic exhaust gas is washed with the detergent sprayed from the spray hole, and the washed exhaust gas enters the adsorbent through the through hole on the water storage tray, is adsorbed, and is finally discharged from the processing box.

The present invention has a rational structural design, compact equipment, space saving, small area, reduced requirements for field conditions for equipment installation, and organically contaminated soil with a thermal decomposition cylinder with an electric heating tube. At the same time, hot air is blown into the contaminated soil by an air heating pipe to bring the soil into contact with the hot air while stirring to enhance the heating effect of the contaminated soil and the efficiency of desorption of organic contaminants in the soil. The contaminated soil is preheated by the preheating cylinder, the soil heating effect is further enhanced, and the exhaust gas generated by the thermal decomposition of the soil is collected and purified by the exhaust gas treatment unit, and the conventional incineration method is used. It can avoid the phenomenon of harmful substances such as dioxin generated when treating exhaust gas, effectively reduce the emission of harmful gas, and make the emission meet the environmental protection requirements.

It is a structural schematic diagram of Example 1 of this invention. It is a schematic of the internal structure of the pyrolysis cylinder in Example 1 of this invention. It is a structural schematic diagram of Example 2 of this invention. It is a structural schematic diagram of Example 3 of this invention. It is a schematic connection diagram of the preheating cylinder and the pyrolysis cylinder in Example 3 of this invention. It is a schematic connection diagram of a mounting frame and a pyrolysis cylinder in Example 3 of this invention. It is a schematic connection diagram of the 2nd pulley and the 1st pulley in Example 3 of this invention. It is a schematic connection diagram of a mounting frame and a pedestal in Example 3 of this invention. It is a left side view of the structure of FIG. 4 of this invention. It is a structural schematic diagram of Example 4 of this invention. It is a structural schematic diagram of Example 5 of this invention. It is a structural schematic diagram of Example 6 of this invention. It is a structural schematic diagram of Example 7 of this invention. It is a structural schematic diagram of Example 8 of this invention. It is a structural schematic diagram of Example 9 of this invention.

[Explanation of code]
1 Spiral stirring Thermal decomposition unit 10 Pedestal 11 Thermal decomposition cylinder 110 Salary hopper 1100 Bracket 111 Discharge hopper 112 Electric heating pipe 113 Second partition plate 12 Spiral agitator 120 Stirring shaft 1200 Second pulley 121 Spiral blade 122 Cleaning scraper 13 Reducer 14 First motor 140 Motor base 15 Mounting frame 150 Circular gear 151 Second motor 152 Mounting plate 153 Gear 2 Preheating ventilation unit 20 Air heating pipe 21 Blower 22 Gas nozzle 3 Exhaust gas processing unit 30 Processing box 300 Pipe 31 Gas homogenization Plate 310 Air duct 32 Spray thrower 320 Water storage tray 321 Spray pipe 3210 Rotating blade 3211 Spray hole 33 Gas adsorption frame 34 Induction draft fan 35 Heat exchanger 36 Bag type dust remover 4 Soil preheating section 40 Preheating tube 400 Passage 401 First partition Plate 41 Electric heating rod 410 Heating fin 411 Arc-shaped shovel plate 412 First pulley 42 Sliding sealing plate 43 Rotary salary plate

Example 1: The forced ventilation-spiral stirring heat desorption device for repairing the organically contaminated soil shown in FIG. 1 is
The pyrolysis cylinder 11 attached to the pedestal 10, the spiral agitator 12 attached to the inside of the thermal decomposition cylinder 11, the spiral agitator 12 attached to the pedestal 10 via the motor base 140, and connected to the spiral agitator 12 via the speed reducer 13. 1 including the motor 14 and the pyrolysis cylinder 11
A salary hopper 110 for injecting organically contaminated soil and a discharge hopper 111 for discharging thermally decomposed organic contaminated soil are provided in the above, and an electric heating tube 112 is fitted in the inner side wall of the thermal decomposition cylinder 11 to form a spiral agitator. Reference numeral 12 is a spiral stirring thermal decomposition unit 1 attached to the pedestal 10 for stirring the organically contaminated soil, including the hollow stirring shaft 120 and the spiral blade 121 attached to the stirring shaft 120.
As shown in FIGS. 1 and 2, the air heating pipe 20 attached to the inside of the stirring shaft 120 and the blower 21 attached to the thermal decomposition cylinder 11 and connected to the air heating pipe 20 are included, and the air heating pipe is attached to the stirring shaft 120. A preheating ventilation unit 2 for heating organically contaminated soil, which is attached to a spiral stirring thermal decomposition unit 1 provided with a gas nozzle 22 for communicating the 20 and the thermal decomposition cylinder 11.
The processing box 30 attached to the pedestal 10, the gas homogenizing plate 31 attached to the bottom of the processing box 30 and connected to the thermal decomposition cylinder 11 via the pipe 300, and the gas homogenizing plate attached to the inside of the processing box 30. A spray thrower 32 located at the top of the 31; a gas adsorption frame 33 mounted at the top of the processing box 30, and an induction draft fan 34 mounted at the top of the processing box 30 on the gas homogenizing plate 31. A plurality of air ducts 310 are uniformly provided on the end face, the spray thrower 32 includes a water storage tray 320 and a spray pipe 321. The water storage tray 320 is connected to an external water source, the water storage tray 320 is provided with a through hole, and the spray pipe 321 is provided. Is a water storage tray 320
The number and position of the air duct 310 correspond to the air duct 310 on a one-to-one basis, and the adsorption frame 33 is filled with the activated carbon adsorbent. Exhaust gas processing unit 3 and
A control unit attached to the pedestal 1 for controlling the operation of the electric heating tube 112, the first motor 14, the air heating tube 20, the blower 21 and the induction draft fan 34, and the electric heating tube 112, the first. The motor 14, the air heating tube 20, the blower 21, and the induction draft fan 34 are commercially available products.

Example 2: Differences from Example 1 are as follows.
As shown in FIG. 3, the soil preheating section 4 is provided in the pyrolysis cylinder 11, and the soil preheating section 4 is the preheating tube 40.
A passage 400 is provided at the connection portion between the preheating cylinder 40 and the pyrolysis cylinder 11, and a first partition plate 401 is provided at the left end inside the preheating cylinder 40, including the electric heating rod 41.
1 is rotatably engaged inside the preheating cylinder 40, penetrates the first partition plate 401, and a plurality of heating fins 410 are uniformly provided in the circumferential direction of the electric heating rod 41, and the heating fins 410 are provided.
An arc-shaped shovel plate 411 is provided at one end away from the electric heating rod 41, a first pulley 412 is provided at the left end of the electric heating rod 41, and a second partition plate 113 is provided at the left end inside the pyrolysis cylinder 11. Is provided, the stirring shaft 120 penetrates the second partition plate 113, and the second
A second pulley 1200 is provided on the left side of the partition plate 113, and the second pulley 1200 is provided.
And the first pulley 412 is driven by a belt, and the payroll hopper 110 is a bracket 1.
Fixedly connected to the pedestal 10 via 100, the salary hopper 110 communicates with the preheating cylinder 40, and the organically contaminated soil is preheated by the soil preheating section 4, effectively evaporating the water in the soil, and the soil becomes. The electric heating rod 41 is a commercially available product that prevents adhesion and formation of clusters, enhances the heating effect of soil, and improves the thermal decomposition efficiency of organically contaminated soil.

Example 3: Differences from Example 2 are as follows.
As shown in FIGS. 4, 5, 6, 7, 8 and 9, four soil preheating portions 4 are provided, and the mounting frame 15 is rotatably engaged with the outer wall of the pyrolysis cylinder 11 to form the pyrolysis cylinder 11. One end is the motor base 14
It is connected to 0, the other end is connected to the pedestal 10 via the support plate, and the four preheating portions 4 are the pyrolysis cylinders 1.
It is uniformly distributed on the outer circumference of No. 1, is fixedly connected to the mounting frame 15, and a sliding sealing plate 42 is provided at each connection portion between the preheating portion 4 and the salary hopper 110, and the pyrolysis cylinder 1 is provided.
A rotary salary plate 43 is provided at the connection portion with 1, an annular gear 150 is provided at both ends of the mounting frame 15, and a second motor 151 and a mounting plate 152 are provided on both sides of the upper end surface of the pedestal 10, respectively. , The gear 153 is rotatably engaged with the mounting plate 152, and the gear 15
3 is meshed and connected to the annular gear 150, the second motor 151 powers the gear 153, the four soil preheating units 4 rotate the mounting frame 15 on the second motor 151, and each soil preheating. When the part 4 is rotated and the soil in the soil preheating part 4 is heated and rotated to the top of the thermal decomposition cylinder 11, the soil enters the thermal decomposition cylinder 11 through the rotary salary plate 43, and the contaminated soil per unit time of the apparatus is used. The second motor 151 is a commercially available product, which not only increases the amount of treatment, but also heats the organically contaminated soil more completely, improving the efficiency of removing organic contaminants in the soil.

Example 4: Differences from Example 1 are as follows.
As shown in FIG. 10, the spray pipe 321 is rotatably engaged with the water storage tray 320.
A rotary blade 3210 is provided on the top of the spray pipe 321 and the spray pipe 321 is provided.
Is fitted to the outside of the air duct 310, the inner wall of the spray pipe 321 is hollow, the spray hole 3211 is provided, and when the external water flow enters the water storage tray 320, the rotating blade 3210 is the spray pipe under the disturbance action of the water flow. The 321 can be rotated and the exhaust gas discharged from the air duct 310 can be cleaned more comprehensively.

Example 5: The differences from Example 1 are as follows.
As shown in FIG. 11, a cleaning scraper 122 is provided on the stirring shaft 120, the cleaning scraper 122 is brought into contact with the inner wall of the pyrolysis cylinder 11, and the cleaning scraper 122 heats the cleaning scraper 122 while the stirring shaft 120 is rotating. It is rotated in close contact with the inner wall of the decomposition cylinder 11 to clean the soil adhering to the thermal decomposition cylinder 11, increase the heat transfer efficiency of the electric heating tube 112, and promote the complete volatilization of organic contaminants in the soil.

Example 6: Differences from Example 1 are as follows.
As shown in FIG. 12, a heat exchanger 35 and a bag-type dust remover 36 are sequentially connected to the pipe 300, and the heat in the exhaust gas is recovered and utilized by the heat exchanger 35 to obtain organic contaminants in the exhaust gas. The heat exchanger 35 and the bag-type dust remover 36 are commercially available products, which promotes desorption, cleans the particulate impurities in the exhaust gas by the bag-type dust remover 36, and reduces the load on the subsequent equipment. be.

Example 7: The differences from Example 3 are as follows.
As shown in FIG. 13, the spray pipe 321 is rotatably engaged with the water storage tray 320.
A rotary blade 3210 is provided on the top of the spray pipe 321 and the spray pipe 321 is provided.
Is fitted to the outside of the air duct 310, the inner wall of the spray pipe 321 is hollow, the spray hole 3211 is provided, and when the external water flow enters the water storage tray 320, the rotating blade 3210 is the spray pipe under the disturbance action of the water flow. The 321 is rotated to more comprehensively clean the exhaust gas discharged from the air duct 310.

Example 8: The differences from Example 7 are as follows.
As shown in FIG. 14, a cleaning scraper 122 is provided on the stirring shaft 120, the cleaning scraper 122 is brought into contact with the inner wall of the pyrolysis cylinder 11, and the cleaning scraper 122 heats the cleaning scraper 122 while the stirring shaft 120 is rotating. It is rotated in close contact with the inner wall of the decomposition cylinder 11 to clean the soil adhering to the thermal decomposition cylinder 11, improve the heat transfer efficiency of the electric heating tube 112, and promote the complete volatilization of organic contaminants in the soil.

Example 9: Differences from Example 8 are as follows.
As shown in FIG. 15, a heat exchanger 35 and a bag-type dust remover 36 are sequentially connected to the pipe 300, and the heat in the exhaust gas is recovered and utilized by the heat exchanger 35 to desorb and desorb organic pollutants in the exhaust gas. The heat exchanger 35 and the bag-type dust remover 36 are commercially available products, respectively, by cleaning the particulate impurities in the exhaust gas by the bag-type dust remover 36 and reducing the load on the subsequent equipment. ..
Experimental Example 1: The same organically contaminated soil in a specific area was repaired by the devices of Examples 1 to 9. During restoration, the maximum heating temperature of organically contaminated soil and the amount treated per unit time are shown in Table 1.

Table 1: Maximum heating temperature of organically contaminated soil and treatment amount per unit time by equipment of various structures

Experimental Example 2: The organically contaminated soil in each specific area was repaired by the devices of Examples 1 to 9.
The removal rates of organic pollutants in soil are shown in Table 2.

Table 2: Removal rate of organic pollutants in soil by devices of various structures

As can be seen by comprehensively comparing the data in Tables 1 and 2, since Example 2 uses the soil preheating section as compared with Example 1, the water content in the soil evaporates effectively. The maximum heating temperature of organic-contaminated soil is further increased, and at the same time, the amount of organic-contaminated soil treated per unit time is also improved, and the removal rate of volatile organic substances and semi-volatile organic substances in the soil is improved. In No. 3, since the contaminated soil is preheated using four soil preheating units as compared with Example 2, the maximum heating temperature of the organic contaminated soil and the treatment amount per unit time are significantly increased, and half of the soil in the soil is used. To further improve the removal rate of volatile organic matter, Example 4 is compared with Example 1 and Example 7 is compared with Example 4 to provide a rotating blade at the top of the spray pipe 1 for rotation. The organic exhaust gas is cleaned by a spray pipe to reduce the content of organic pollutants in the exhaust gas and improve the removal rate of the organic pollutants, and Example 5 is compared with Example 1 and Example. In No. 8, since the cleaning scraper is provided on the stirring shaft as compared with Example 7, the heat transfer efficiency of the electric heating tube is improved, the maximum heating temperature of the contaminated soil is raised, and the removal efficiency of organic pollutants is improved. Since Example 6 is provided with a heat exchanger and a bag-type dust remover in the pipe as compared with Example 1 and Example 9 as compared with Example 8, organic contaminants in the exhaust gas are effectively desorbed. Being done
At the same time, the bag-type dust remover can clean the particulate impurities in the exhaust gas, reduce the load on the subsequent equipment, and improve the treatment efficiency of the contaminated soil of the equipment.

Claims (4)

Spiral stirring pyrolysis unit (1) attached to the pedestal (10) to stir organically contaminated soil
When,
The spiral stirring pyrolysis unit (1) is a pyrolysis cylinder (11) attached to a pedestal (10).
And the spiral agitator (12) attached to the inside of the pyrolysis cylinder (11), and the spiral agitator (12) attached to the pedestal (10) via the motor base (140) and via the speed reducer (13). A first motor (14) to be connected is provided, and the pyrolysis cylinder (
A hopper (110) for putting the organically contaminated soil into 11) and a discharge hopper (111) for discharging the pyrolyzed organically contaminated soil are provided, and the inner side wall of the pyrolysis cylinder (11) is provided. An electric heating tube (112) is fitted and the spiral agitator (12) is attached to a hollow stirring shaft (120) and a spiral blade (12).
Including 1)
A preheated ventilation unit (2) attached to the spiral stirring pyrolysis unit (1) for heating organically contaminated soil,
The preheating ventilation unit (2) is connected to an air heating pipe (20) attached to the inside of the stirring shaft (120) and to the air heating pipe (20) attached to the thermal decomposition cylinder (11). A gas nozzle (22) for communicating the air heating pipe (20) and the thermal decomposition cylinder (11) is provided on the stirring shaft (120) including the blower (21).
An exhaust gas treatment unit (3) attached to the pedestal (10) and communicating with the spiral stirring pyrolysis unit (1) and having an induction draft fan (34).
The exhaust gas processing unit (3) includes a processing box (30) attached to the pedestal (10).
, A pyrolysis cylinder attached to the bottom of the processing box (30) via a pipe (300).
The gas homogenizing plate (31) connected to (11) and the inside of the processing box (30).
A spray thrower (32) attached to and located at the top of the gas homogenizing plate (31).
), And the gas adsorption frame (33) attached to the top of the processing box (30).
Including an inductive draft fan (34) attached to the top of the processing box (30).
Only, a plurality of air ducts (310) are uniformly installed on the upper end surface of the gas homogenizing plate (31).
The spray thrower (32) is a water storage tray (320) and a spray pipe.
Including (321), the water storage tray (320) is connected to an external water source and the water storage tray (3) is connected.
A through hole is provided in 20), and the spray pipe (321) is under the water storage tray (320).
It is provided on the end face, and its number and position correspond to the air duct (310) on a one-to-one basis, and the adsorption
The frame (33) is filled with an adsorbent and
Controls attached to the pedestal (1) to control the operation of the electric heating tube (112), the first motor (14), the air heating tube (20), the blower (21) and the induction draft fan (34). Department and
Forced ventilation for repairing organically contaminated soil, characterized by containing-spiral agitation heat desorption device. The soil preheating section (4) is provided in the thermal decomposition tube (11), and the soil preheating section (4) is a preheating tube (40).
) And an electric heating rod (41), a passage (400) is provided at the connection portion between the preheating cylinder (40) and the pyrolysis cylinder (11), and a first partition is provided at the left end inside the preheating cylinder (40). Board (401
) Is provided, the electric heating rod (41) is rotatably engaged inside the preheating cylinder (40), penetrates the first partition plate (401), and is oriented in the circumferential direction of the electric heating rod (41). A plurality of heating fins (410) are uniformly provided, and the electric heating rod (41) of the heating fins (410) is provided.
An arc-shaped shovel plate (411) is provided at one end away from the electric heating rod (4).
A first pulley (412) is provided at the left end of 1), a second partition plate (113) is provided at the left end inside the thermal decomposition cylinder (11), and the stirring shaft (120) is a second. Partition plate (11
A second pulley (1200) is provided on the left side of the second partition plate (113) so as to penetrate 3), and the second pulley (1200) and the first pulley (412) are driven by a belt. The device according to claim 1, wherein the hopper (110) is fixedly connected to the pedestal (10) via a bracket (1100), and the hopper (110) communicates with the preheating cylinder (40). .. The apparatus according to claim 1, wherein a cleaning scraper (122) is provided on the stirring shaft (120), and the cleaning scraper (122) is brought into contact with the inner wall of the pyrolysis cylinder (11). A heat exchanger (35) and a bag-type dust remover (36) are sequentially attached to the pipe (300).
The device according to claim 1, wherein the device is connected to the device.

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