CN116786575A - Ex-situ thermal desorption equipment and method for pesticide pollution site treatment - Google Patents
Ex-situ thermal desorption equipment and method for pesticide pollution site treatment Download PDFInfo
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- CN116786575A CN116786575A CN202310702112.0A CN202310702112A CN116786575A CN 116786575 A CN116786575 A CN 116786575A CN 202310702112 A CN202310702112 A CN 202310702112A CN 116786575 A CN116786575 A CN 116786575A
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- thermal desorption
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- throwing frame
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- 238000003795 desorption Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000575 pesticide Substances 0.000 title claims abstract description 38
- 238000011066 ex-situ storage Methods 0.000 title claims description 7
- 239000002689 soil Substances 0.000 claims abstract description 185
- 238000010438 heat treatment Methods 0.000 claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 17
- 230000005855 radiation Effects 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000010813 municipal solid waste Substances 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 dichloroethylene, trichloroethylene Chemical group 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an ectopic thermal desorption device and method for treating a pesticide polluted site, wherein the device comprises a box body, a feeding component and a thermal desorption component; the box body comprises a first box body and a second box body arranged at the upper end of the first box body; the feeding assembly comprises a feeding hopper arranged on the second box body, a rotary roller arranged in the second box body and a rotary motor for providing power for the rotary roller, and a steel crawler belt is arranged on the rotary roller; the thermal desorption assembly comprises a heating fan arranged on the first box body, an air injection disc arranged at the inner bottom of the first box body, a soil throwing frame clamped in the first box body and a lifting motor for providing power for the soil throwing frame; the soil throwing frame is provided with a rotary baffle, and the lower end of the soil throwing frame is provided with an electric push rod connected with the rotary baffle; a lifting screw rod in threaded connection with the soil throwing frame is clamped in the first box body, and the lifting motor provides power for the lifting screw rod; the device has reasonable structural design, obvious thermal desorption effect on the pesticide polluted soil and is suitable for popularization and use.
Description
Technical Field
The invention relates to the technical field of pesticide contaminated soil treatment, in particular to ectopic thermal desorption equipment and method for treating pesticide contaminated sites.
Background
In recent years, with the relocation of pesticide production and processing enterprises, the residual sites are high in detection concentration of raw materials and solvents used in the pesticide production and synthesis processes of benzene series, phenol, chlorinated hydrocarbon, polycyclic aromatic hydrocarbon, total petroleum hydrocarbon, dichloroethylene, trichloroethylene and the like besides detecting multi-generation pesticides, and the pollutants are difficult to degrade in a short time, so that serious threats are caused to human health and environmental safety.
The thermal desorption restoration technology is a process of heating polluted soil to a sufficient temperature through direct heating or indirect heating so as to volatilize or separate organic pollutants contained in the polluted soil. Thermal desorption is a physical separation process that converts contaminants from one phase to another, and target contaminants can be selectively volatilized by controlling the temperature and material residence time of the thermal desorption system.
However, in the prior art, the thermal desorption equipment for treating the soil of the pesticide polluted site has higher energy consumption in the use process, so that the treatment cost of a treatment enterprise is increased; contaminated soil thermal desorption effect is poor, and certain difficulty exists in secondary utilization, and waste of soil resources is caused.
Disclosure of Invention
Aiming at the technical problems, the invention provides ectopic thermal desorption equipment and method for treating pesticide polluted sites.
The technical scheme of the invention is as follows: an off-site thermal desorption device for treating pesticide pollution sites comprises a box body, a feeding component and a thermal desorption component, wherein the feeding component and the thermal desorption component are arranged in the box body; the box body comprises a first box body arranged on the base and a second box body arranged at the upper end of the first box body; the bottom in the first box body is provided with a separation net, and the side wall is provided with a discharge chute and an exhaust pipe; the lower end of the second box body is provided with a discharge hole communicated with the first box body;
the feeding assembly comprises a feeding hopper arranged on the upper end face of the second box body, two rotating rollers horizontally arranged in the second box body in parallel and a rotating motor arranged on the side wall of the second box body and used for providing power for one of the rotating rollers; the two rotating rollers are respectively and rotatably clamped at two sides in the second box body, and steel tracks are wound on the two rotating rollers;
the thermal desorption assembly comprises a heating fan arranged on the base, an air injection disk arranged at the inner bottom of the first box body and connected with the heating fan through a conduit, a soil throwing frame movably clamped in the first box body, and a lifting motor arranged on the side wall of the first box body and used for providing power for the soil throwing frame; a plurality of rotary baffles are distributed in the soil throwing frame at equal intervals, each rotary baffle is rotationally clamped with the soil throwing frame, one end of each rotary baffle penetrates through the soil throwing frame through a connecting shaft, pull plates are vertically arranged at the end parts of each connecting shaft, the lower ends of the pull plates are in sliding clamping connection through pushing plates, and an electric push rod connected with the pushing plates is arranged on the lower bottom surface of the soil throwing frame; lifting lead screws in threaded connection with the soil throwing frame are rotationally clamped at four corners of the inner part of the first box body, and first bevel gears are arranged outside the lifting lead screws; the lifting motors are arranged in two, the output shafts of the two lifting motors horizontally penetrate through the first box body, and second bevel gears in meshed connection with the first bevel gears are sleeved outside the two output shafts.
Further, a plurality of heating cavities are distributed in the first box body at equal intervals, and feeding holes are formed in the upper end of the first box body and correspond to the positions of the heating cavities; the number of the air injection discs and the soil throwing frames is correspondingly consistent with that of the heating cavities; the second box body is in sliding clamping connection with the upper end of the first box body through a sliding beam; an intermittent motor is arranged at the end part of the sliding beam, and an output shaft of the intermittent motor is provided with an intermittent screw rod which penetrates through the sliding beam and is in threaded connection with the second box body;
description: through set up a plurality of heating chambers in first box for get into the inside contaminated soil of first box and be separated and heat, avoided the contaminated soil to pile up inside first box and influence heating efficiency, improved the thermal desorption efficiency of contaminated soil.
Further, a plurality of blanking spirals are distributed at the joint of the feeding hopper and the second box body at equal intervals, the end parts of the blanking spirals penetrate through the feeding hopper and are provided with connecting gears, the connecting gears are driven by chains, and the upper end face of the second box body is provided with a blanking motor for providing power for one of the connecting gears;
description: through setting up a plurality of unloading spirals in the feeder hopper bottom, not only be favorable to improving the continuity that pollutes soil whereabouts, be favorable to improving the stability of soil whereabouts volume moreover.
Further, a crushing roller is rotatably clamped in the second box body and positioned at the lower end of the feed hopper, and a crushing motor for providing power for the crushing roller is arranged on the side wall of the second box body;
description: the crushing roller is used for crushing the polluted soil, so that the granularity of the polluted soil is finer, and the temperature of the polluted soil is increased more rapidly.
Further, a grate which is abutted with the upper end face of the steel track is arranged at the inner top of the second box body and at one end far away from the crushing roller; a trash discharging bucket is arranged on the side wall of the second box body and at a position corresponding to the grate;
description: in the process of conveying the soil by the steel crawler belt, the large-particle impurities in the soil are cleaned by the grate, and the impurities in the soil are discharged out of the second box body through the impurity discharging hopper, so that the influence of the impurities such as stones in the soil on the normal operation of the equipment is avoided, and the operation stability of the equipment is improved.
Further, an infrared radiation pipe positioned between the two rotating rollers is arranged on the inner wall of the second box body;
description: the infrared auxiliary heat pipe is utilized to preheat the polluted soil, which is beneficial to reducing the energy consumption of the Microsoft soil in thermal desorption treatment.
Further, the upper end and the lower end of the soil throwing frame are rotatably clamped with cleaning brush sleeves sleeved outside the lifting screw rods at corresponding positions;
description: in the up-and-down movement process of the soil throwing frame, the cleaning brush sleeve moves along with the soil throwing frame and rotates on the lifting screw rod to clean soil particles attached to the lifting screw rod, so that gaps between the soil throwing frame and the lifting screw rod are prevented from being blocked by the soil particles.
Further, a sealing push-pull plate is arranged on the first box body and corresponds to each feeding hole position;
description: the sealing push-pull plate is utilized to shield the feeding hole, so that the loss of heat in the first box body is reduced, and the energy consumption of the equipment is reduced.
Further, an arc-shaped soil blocking block is arranged in the second box body and is close to one side of the crushing roller;
description: through setting up the arc fender soil piece for the inside contaminated soil who gets into the second box falls to the steel track at the effect of arc fender soil piece, avoids contaminated soil to pile up inside the second box.
The invention also provides an ectopic thermal desorption method for treating the pesticide polluted site, which comprises the following steps:
s1, respectively connecting a rotating motor, a heating fan, a lifting motor and an electric push rod with an external power supply;
s2, starting a rotating motor and a heating fan, and driving the rotating rollers to rotate by using the rotating motor, so that the steel crawler belt rotates around the two rotating rollers; digging soil in a pesticide contaminated site, putting the soil into the second box body through a feed hopper, enabling the soil to fall on the steel crawler belt firstly, and then enabling the soil to enter the first box body through a feed hole under the conveying action of the steel crawler belt;
s3, hot air generated by the heating fan is sprayed into the polluted soil through the air spraying disc, and the soil is heated to 160-230 ℃; the volatile harmful gases in the soil thermal desorption process are discharged out of the first box body through the exhaust pipe to be collected;
s4, in the soil thermal desorption process, starting a lifting motor, driving an output shaft to rotate through the lifting motor, and enabling a lifting screw to rotate by utilizing the meshing action of a second bevel gear and a first bevel gear; the soil throwing frame moves up and down along the inner wall of the first box under the action of the lifting screw rod; in the ascending process of the soil throwing frame, the electric push rod is utilized to drive the pushing plate to move, so that the pulling plate pulls the connecting shaft, and finally, each rotary baffle is positioned at the horizontal position; when the soil throwing frame rises to the highest point, the electric push rods are utilized to adjust each rotary baffle to the vertical position, so that the polluted soil naturally falls;
and S5, repeating the step S4 4-8 times, and finally discharging the soil subjected to thermal desorption treatment out of the first box body through the discharge chute.
Compared with the prior art, the invention has the beneficial effects that:
the first, the structural design of the apparatus of the invention is rational, the pesticide contaminated soil is continuously and evenly put into the first box body to carry on the thermal desorption treatment through the feeding assembly, have improved the work continuity and running stability of the apparatus effectively;
the second, the invention, through setting up the multiple heating chambers in the first box, make the polluted soil entering the first box inside separate and carry on the thermal desorption treatment, have avoided the polluted soil to pile up in the first box inside and influence the heating efficiency, have raised the thermal desorption efficiency of the polluted soil;
thirdly, the soil throwing frames which move up and down are arranged in the heating cavities, so that the polluted soil in the heating cavities is continuously lifted and falls down freely, the heating uniformity of the polluted soil is improved, the energy consumption of equipment is reduced, and the cost investment of processing enterprises is reduced.
Drawings
FIG. 1 is a longitudinal cross-sectional view of the invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic illustration of the connection of the feed hopper to the first housing of the present invention;
FIG. 4 is a graph showing the distribution of the feed screw of the present invention on the first tank;
FIG. 5 is a schematic view showing the internal structure of the first casing of the present invention;
FIG. 6 is a schematic illustration of the attachment of the rotating barrier to the soil slinger of the present invention;
FIG. 7 is a schematic view of the connection of the electric putter and the soil throwing frame of the present invention;
FIG. 8 is a schematic diagram of the connection of the cleaning brush sleeve and the lifting screw of the present invention;
the device comprises a 1-box body, a 10-first box body, a 100-feeding hole, a 11-second box body, a 110-discharging hole, a 12-screen, a 13-discharging groove, a 14-discharging pipe, a 15-heating cavity, a 16-sliding beam, a 160-intermittent motor, a 161-intermittent screw rod, a 17-sealing push-pull plate, a 2-feeding component, a 20-feeding hopper, a 21-rotating roller, a 22-rotating motor, a 23-steel track, a 24-blanking screw, a 240-connecting gear, a 25-blanking motor, a 26-crushing roller, a 260-crushing motor, a 27-grate, a 270-impurity discharging hopper, a 28-infrared radiation heat pipe, a 29-arc-shaped soil blocking block, a 3-thermal desorption component, a 30-heating fan, a 31-jet disc, a 310-guide pipe, a 32-throwing frame, a 320-rotating baffle, a 321-connecting shaft, a 322-pulling plate, a 323-pushing plate, a 324-cleaning brush sleeve, a 33-lifting motor, a 330-output shaft, a 331-second bevel gear, a 34-electric push rod, a 35-lifting bevel gear and a 350-first bevel gear.
Detailed Description
Example 1
The off-site thermal desorption equipment for treating the pesticide polluted site as shown in fig. 1 and 2 comprises a box body 1, a feeding component 2 and a thermal desorption component 3, wherein the feeding component 2 and the thermal desorption component 3 are arranged in the box body 1; the box body 1 comprises a first box body 10 arranged on a base and a second box body 11 arranged at the upper end of the first box body 10; the inner bottom of the first box body 10 is provided with a separation net 12, and the side wall is provided with a discharge chute 13 and an exhaust pipe 14; the lower end of the second box body 11 is provided with a discharge hole 110 communicated with the first box body 10;
as shown in fig. 1, the feeding assembly 2 comprises a feed hopper 20 arranged on the upper end surface of the second box body 11, two rotating rollers 21 horizontally arranged in parallel in the second box body 11, and a rotating motor 22 arranged on the side wall of the second box body 11 and used for providing power for one of the rotating rollers 21; the two rotating rollers 21 are respectively rotatably clamped at two sides of the interior of the second box body 11, and steel tracks 23 are wound on the two rotating rollers 21;
as shown in fig. 1, 5, 6 and 7, the thermal desorption assembly 3 comprises a heating fan 30 arranged on a base, an air injection disk 31 arranged at the inner bottom of the first box body 10 and connected with the heating fan 30 through a conduit 310, a soil throwing frame 32 movably clamped in the first box body 10, and a lifting motor 33 arranged on the side wall of the first box body 10 and used for providing power for the soil throwing frame 32; 5 rotary baffles 320 are equidistantly distributed in the soil throwing frame 32, each rotary baffle 320 is rotatably clamped with the soil throwing frame 32, one end of each rotary baffle 320 penetrates through the soil throwing frame 32 through a connecting shaft 321, pull plates 322 are vertically arranged at the end parts of each connecting shaft 321, the lower ends of the pull plates 322 are slidably clamped through pushing plates 323, and an electric push rod 34 connected with the pushing plates 323 is arranged on the lower bottom surface of the soil throwing frame 32; lifting lead screws 35 which are in threaded connection with the soil throwing frame 32 are rotatably clamped at four corners of the inside of the first box body 10, and first bevel gears 350 are arranged outside the lifting lead screws 35; the lifting motors 33 are provided with two, the output shafts 330 of the two lifting motors 33 horizontally penetrate through the first box body 10, and the outer parts of the two output shafts 330 are sleeved with second bevel gears 331 which are in meshed connection with the first bevel gears 350.
Example 2
This example describes an ex situ thermal desorption method for treatment of pesticide contaminated sites using the apparatus of example 1, comprising the steps of:
s1, respectively connecting a rotating motor 22, a heating fan 30, a lifting motor 33 and an electric push rod 34 with an external power supply;
s2, starting a rotating motor 22 and a heating fan 30, and driving the rotating rollers 21 to rotate by utilizing the rotating motor 22, so that the steel crawler belt 23 rotates around the two rotating rollers 21; digging soil in a pesticide contaminated site, putting the soil into the second box body 11 through a feed hopper 20, enabling the soil to fall on a steel crawler belt 23 firstly, and then enabling the soil to enter the first box body 10 through a feed hole 100 under the conveying action of the steel crawler belt 23;
s3, hot air generated by the heating fan 30 is sprayed into the polluted soil through the air spraying disc 31, and the soil is heated to 160 ℃; the volatile harmful gases in the soil thermal desorption process are discharged out of the first box body 10 through the exhaust pipe 14 for collection;
s4, in the soil thermal desorption process, starting a lifting motor 33, driving an output shaft 330 to rotate through the lifting motor 33, and enabling a lifting screw rod 35 to rotate by utilizing the meshing action of a second bevel gear 331 and a first bevel gear 350; the soil throwing frame 32 moves up and down along the inner wall of the first box 10 under the action of the lifting screw 35; in the process of lifting the soil throwing frame 32, the electric push rod 34 is utilized to drive the pushing plate 323 to move, so that the pulling plate 322 pulls the connecting shaft 321, and finally, each rotary baffle 320 is in a horizontal position; when the soil throwing frame 32 rises to the highest point, the electric push rods 34 are utilized to adjust each rotary baffle 320 to the vertical position, so that the polluted soil naturally falls;
and S5, repeating the step S4 4 for a plurality of times, and finally discharging the soil subjected to thermal desorption treatment out of the first box body 10 through the discharge chute 13.
Example 3
The off-site thermal desorption equipment for treating the pesticide polluted site as shown in figures 1, 2 and 3 comprises a box body 1, a feeding component 2 and a thermal desorption component 3, wherein the feeding component 2 and the thermal desorption component 3 are arranged in the box body 1; the box body 1 comprises a first box body 10 arranged on a base and a second box body 11 arranged at the upper end of the first box body 10; the inner bottom of the first box body 10 is provided with a separation net 12, and the side wall is provided with a discharge chute 13 and an exhaust pipe 14; the lower end of the second box body 11 is provided with a discharge hole 110 communicated with the first box body 10; a plurality of heating cavities 15 are distributed in the first box body 10 at equal intervals, and feeding holes 100 are formed in the upper end of the first box body 10 and correspond to the positions of the heating cavities 15; the second box 11 is slidably clamped at the upper end of the first box 10 through a sliding beam 16; an intermittent motor 160 is arranged at the end part of the sliding beam 16, and an intermittent screw 161 which penetrates through the sliding beam 16 and is in threaded connection with the second box 11 is arranged on an output shaft of the intermittent motor 160;
as shown in fig. 1, the feeding assembly 2 comprises a feed hopper 20 arranged on the upper end surface of the second box body 11, two rotating rollers 21 horizontally arranged in parallel in the second box body 11, and a rotating motor 22 arranged on the side wall of the second box body 11 and used for providing power for one of the rotating rollers 21; the two rotating rollers 21 are respectively rotatably clamped at two sides of the interior of the second box body 11, and steel tracks 23 are wound on the two rotating rollers 21;
as shown in fig. 1, 5, 6 and 7, the thermal desorption assembly 3 comprises a heating fan 30 arranged on a base, an air injection disk 31 arranged at the bottom of each heating cavity 15 and connected with the heating fan 30 through a conduit 310, a soil throwing frame 32 movably clamped inside each heating cavity 15, and a lifting motor 33 arranged on the side wall of the first box body 10 and used for providing power for the soil throwing frame 32; 5 rotary baffles 320 are equidistantly distributed in the soil throwing frame 32, each rotary baffle 320 is rotatably clamped with the soil throwing frame 32, one end of each rotary baffle 320 penetrates through the soil throwing frame 32 through a connecting shaft 321, pull plates 322 are vertically arranged at the end parts of each connecting shaft 321, the lower ends of the pull plates 322 are slidably clamped through pushing plates 323, and an electric push rod 34 connected with the pushing plates 323 is arranged on the lower bottom surface of the soil throwing frame 32; lifting screw rods 35 which are in threaded connection with the soil throwing frames 32 at the corresponding main positions are rotationally clamped at four corners of the inside of each heating intensity 15, and first bevel gears 350 are arranged outside each lifting screw rod 35; the lifting motors 33 are provided with two, the output shafts 330 of the two lifting motors 33 horizontally penetrate through the first box body 10, and the outer parts of the two output shafts 330 are sleeved with second bevel gears 331 which are in meshed connection with the first bevel gears 350.
Example 4
This example describes an ex situ thermal desorption method for treatment of pesticide contaminated sites using the apparatus of example 3, comprising the steps of:
s1, respectively connecting an intermittent motor 160, a rotary motor 22, a heating fan 30, a lifting motor 33 and an electric push rod 34 with an external power supply;
s2, starting a rotating motor 22 and a heating fan 30, and driving the rotating rollers 21 to rotate by using the rotating motor 22, so that the steel crawler belt 23 rotates around the two rotating rollers 21; the method comprises the steps of (1) digging soil in a pesticide contaminated site, putting the soil into a second box body 11 through a feed hopper 20, enabling the contaminated soil to firstly fall on a steel crawler belt 23, then entering one of heating cavities 15 in the first box body 11 through a feed hole 100 under the conveying action of the steel crawler belt 23, then starting an intermittent motor 160, and driving an intermittent screw rod 160 to rotate by using the intermittent motor 160, so that the second box body 11 moves on a sliding beam 16, and putting the contaminated soil into each heating cavity 15;
s3, hot air generated by the heating fan 30 is sprayed into the polluted soil through the air spraying disc 31, and the soil is heated to 195 ℃; the volatile harmful gases in the soil thermal desorption process are discharged out of the first box body 10 through the exhaust pipe 14 for collection;
s4, in the soil thermal desorption process, starting a lifting motor 33, driving an output shaft 330 to rotate through the lifting motor 33, and enabling a lifting screw rod 35 to rotate by utilizing the meshing action of a second bevel gear 331 and a first bevel gear 350; the soil throwing frame 32 moves up and down along the inner wall of the first box 10 under the action of the lifting screw 35; in the process of lifting the soil throwing frame 32, the electric push rod 34 is utilized to drive the pushing plate 323 to move, so that the pulling plate 322 pulls the connecting shaft 321, and finally, each rotary baffle 320 is in a horizontal position; when the soil throwing frame 32 rises to the highest point, the electric push rods 34 are utilized to adjust each rotary baffle 320 to the vertical position, so that the polluted soil naturally falls;
and S5, repeating the step S4 6 for a plurality of times, and finally discharging the soil subjected to thermal desorption treatment out of the first box body 10 through the discharge chute 13.
Example 5
The off-site thermal desorption equipment for treating the pesticide polluted site as shown in figures 1, 2 and 3 comprises a box body 1, a feeding component 2 and a thermal desorption component 3, wherein the feeding component 2 and the thermal desorption component 3 are arranged in the box body 1; the box body 1 comprises a first box body 10 arranged on a base and a second box body 11 arranged at the upper end of the first box body 10; the inner bottom of the first box body 10 is provided with a separation net 12, and the side wall is provided with a discharge chute 13 and an exhaust pipe 14; the lower end of the second box body 11 is provided with a discharge hole 110 communicated with the first box body 10; a plurality of heating cavities 15 are distributed in the first box body 10 at equal intervals, and feeding holes 100 are formed in the upper end of the first box body 10 and correspond to the positions of the heating cavities 15; the second box 11 is slidably clamped at the upper end of the first box 10 through a sliding beam 16; an intermittent motor 160 is arranged at the end part of the sliding beam 16, and an intermittent screw 161 which penetrates through the sliding beam 16 and is in threaded connection with the second box 11 is arranged on an output shaft of the intermittent motor 160;
as shown in fig. 1, 2 and 4, the feeding assembly 2 comprises a feeding hopper 20 arranged on the upper end surface of the second box body 11, two rotating rollers 21 horizontally arranged in parallel in the second box body 11, and a rotating motor 22 arranged on the side wall of the second box body 11 and used for providing power for one of the rotating rollers 21; the two rotating rollers 21 are respectively rotatably clamped at two sides of the interior of the second box body 11, and steel tracks 23 are wound on the two rotating rollers 21; 5 blanking spirals 24 are equidistantly distributed at the joint of the feed hopper 20 and the second box body 11, the end parts of the blanking spirals 24 penetrate through the feed hopper 20 and are provided with connecting gears 240, the connecting gears 240 are driven by chains, and the upper end surface of the second box body 11 is provided with a blanking motor 25 for providing power for one of the connecting gears 240; the crushing roller 26 is rotatably clamped in the second box 11 and positioned at the lower end of the feed hopper 20, and a crushing motor 260 for providing power for the crushing roller 26 is arranged on the side wall of the second box 11; a grate 27 which is abutted against the upper end face of the steel track 23 is arranged at the inner top of the second box body 11 and at one end far away from the crushing roller 26; a trash discharging hopper 270 is arranged on the side wall of the second box body 11 and at the position corresponding to the position of the grate 27; an infrared radiation pipe 28 positioned between the two rotating rollers 21 is arranged on the inner wall of the second box body 11;
as shown in fig. 1, 5, 6 and 7, the thermal desorption assembly 3 comprises a heating fan 30 arranged on a base, an air injection disk 31 arranged at the bottom of each heating cavity 15 and connected with the heating fan 30 through a conduit 310, a soil throwing frame 32 movably clamped inside each heating cavity 15, and a lifting motor 33 arranged on the side wall of the first box body 10 and used for providing power for the soil throwing frame 32; 5 rotary baffles 320 are equidistantly distributed in the soil throwing frame 32, each rotary baffle 320 is rotatably clamped with the soil throwing frame 32, one end of each rotary baffle 320 penetrates through the soil throwing frame 32 through a connecting shaft 321, pull plates 322 are vertically arranged at the end parts of each connecting shaft 321, the lower ends of the pull plates 322 are slidably clamped through pushing plates 323, and an electric push rod 34 connected with the pushing plates 323 is arranged on the lower bottom surface of the soil throwing frame 32; lifting screw rods 35 which are in threaded connection with the soil throwing frames 32 at the corresponding main positions are rotationally clamped at four corners of the inside of each heating intensity 15, and first bevel gears 350 are arranged outside each lifting screw rod 35; the lifting motors 33 are provided with two, the output shafts 330 of the two lifting motors 33 horizontally penetrate through the first box body 10, and the outer parts of the two output shafts 330 are sleeved with second bevel gears 331 which are in meshed connection with the first bevel gears 350.
Example 6
This example describes an ex situ thermal desorption method for treatment of pesticide contaminated sites using the apparatus of example 5, comprising the steps of:
s1, respectively connecting an intermittent motor 160, a rotary motor 22, a blanking motor 25, a crushing motor 260, an infrared radiation pipe 28, a heating fan 30, a lifting motor 33 and an electric push rod 34 with an external power supply;
s2, starting a rotating motor 22, a blanking motor 25, a crushing motor 260, an infrared radiation heat pipe 28 and a heating fan 30, driving each blanking spiral 24 to rotate by using the blanking motor 25, and driving the rotating rollers 21 to rotate by using the rotating motor 22, so that the steel crawler 23 rotates around the two rotating rollers 21; digging the soil in the pesticide polluted site into a feed hopper 20, uniformly dropping the polluted soil into the second box body 11 under the action of a material spiral 24, enabling the polluted soil to fall on a steel crawler 23 firstly, enabling the polluted soil to enter one of the heating cavities 15 in the first box body 11 through a feed hole 100 under the conveying action of the steel crawler 23, starting an intermittent motor 160, and driving the intermittent screw 160 to rotate by utilizing the intermittent motor 160, so that the second box body 11 moves on a sliding beam 16, and further throwing the polluted soil into each heating cavity 15; during the process that the polluted soil falls on the steel caterpillar 23, the polluted soil is crushed by the crushing roller 26; during the rotation process of the steel crawler 23, the grate 27 is used for cleaning large-particle impurities in the soil, and the impurities are discharged out of the second box 11 through the impurity discharging hopper 270; preheating the polluted soil through an infrared auxiliary heat pipe 28;
s3, hot air generated by the heating fan 30 is sprayed into the polluted soil through the air spraying disc 31, and the soil is heated to 230 ℃; the volatile harmful gases in the soil thermal desorption process are discharged out of the first box body 10 through the exhaust pipe 14 for collection;
s4, in the soil thermal desorption process, starting a lifting motor 33, driving an output shaft 330 to rotate through the lifting motor 33, and enabling a lifting screw rod 35 to rotate by utilizing the meshing action of a second bevel gear 331 and a first bevel gear 350; the soil throwing frame 32 moves up and down along the inner wall of the first box 10 under the action of the lifting screw 35; in the process of lifting the soil throwing frame 32, the electric push rod 34 is utilized to drive the pushing plate 323 to move, so that the pulling plate 322 pulls the connecting shaft 321, and finally, each rotary baffle 320 is in a horizontal position; when the soil throwing frame 32 rises to the highest point, the electric push rods 34 are utilized to adjust each rotary baffle 320 to the vertical position, so that the polluted soil naturally falls;
and S5, repeating the step S4 8 for a plurality of times, and finally discharging the soil subjected to thermal desorption treatment out of the first box body 10 through the discharge chute 13.
Example 7
The off-site thermal desorption equipment for treating the pesticide polluted site as shown in figures 1, 2 and 3 comprises a box body 1, a feeding component 2 and a thermal desorption component 3, wherein the feeding component 2 and the thermal desorption component 3 are arranged in the box body 1; the box body 1 comprises a first box body 10 arranged on a base and a second box body 11 arranged at the upper end of the first box body 10; the inner bottom of the first box body 10 is provided with a separation net 12, and the side wall is provided with a discharge chute 13 and an exhaust pipe 14; the lower end of the second box body 11 is provided with a discharge hole 110 communicated with the first box body 10; a plurality of heating cavities 15 are distributed in the first box body 10 at equal intervals, and feeding holes 100 are formed in the upper end of the first box body 10 and correspond to the positions of the heating cavities 15; the second box 11 is slidably clamped at the upper end of the first box 10 through a sliding beam 16; an intermittent motor 160 is arranged at the end part of the sliding beam 16, and an intermittent screw 161 which penetrates through the sliding beam 16 and is in threaded connection with the second box 11 is arranged on an output shaft of the intermittent motor 160; a sealing push-pull plate 17 is arranged on the first box body 1 and corresponds to the positions of the feeding holes 100;
as shown in fig. 1, 2 and 4, the feeding assembly 2 comprises a feeding hopper 20 arranged on the upper end surface of the second box body 11, two rotating rollers 21 horizontally arranged in parallel in the second box body 11, and a rotating motor 22 arranged on the side wall of the second box body 11 and used for providing power for one of the rotating rollers 21; the two rotating rollers 21 are respectively rotatably clamped at two sides of the interior of the second box body 11, and steel tracks 23 are wound on the two rotating rollers 21; 5 blanking spirals 24 are equidistantly distributed at the joint of the feed hopper 20 and the second box body 11, the end parts of the blanking spirals 24 penetrate through the feed hopper 20 and are provided with connecting gears 240, the connecting gears 240 are driven by chains, and the upper end surface of the second box body 11 is provided with a blanking motor 25 for providing power for one of the connecting gears 240; the crushing roller 26 is rotatably clamped in the second box 11 and positioned at the lower end of the feed hopper 20, and a crushing motor 260 for providing power for the crushing roller 26 is arranged on the side wall of the second box 11; a grate 27 which is abutted against the upper end face of the steel track 23 is arranged at the inner top of the second box body 11 and at one end far away from the crushing roller 26; a trash discharging hopper 270 is arranged on the side wall of the second box body 11 and at the position corresponding to the position of the grate 27; an infrared radiation pipe 28 positioned between the two rotating rollers 21 is arranged on the inner wall of the second box body 11; an arc-shaped soil blocking block 29 is arranged in the second box body 11 and at one side close to the crushing roller 26;
as shown in fig. 1, 5, 6, 7 and 8, the thermal desorption assembly 3 comprises a heating fan 30 arranged on a base, an air injection disk 31 arranged at the bottom of each heating cavity 15 and connected with the heating fan 30 through a conduit 310, a soil throwing frame 32 movably clamped inside each heating cavity 15, and a lifting motor 33 arranged on the side wall of the first box body 10 and used for providing power for the soil throwing frame 32; 5 rotary baffles 320 are equidistantly distributed in the soil throwing frame 32, each rotary baffle 320 is rotatably clamped with the soil throwing frame 32, one end of each rotary baffle 320 penetrates through the soil throwing frame 32 through a connecting shaft 321, pull plates 322 are vertically arranged at the end parts of each connecting shaft 321, the lower ends of the pull plates 322 are slidably clamped through pushing plates 323, and an electric push rod 34 connected with the pushing plates 323 is arranged on the lower bottom surface of the soil throwing frame 32; lifting screw rods 35 which are in threaded connection with the soil throwing frames 32 at the corresponding main positions are rotationally clamped at four corners of the inside of each heating intensity 15, and first bevel gears 350 are arranged outside each lifting screw rod 35; the two lifting motors 33 are arranged, the output shafts 330 of the two lifting motors 33 horizontally penetrate through the first box body 10, and second bevel gears 331 which are in meshed connection with the first bevel gears 350 are sleeved outside the two output shafts 330; the upper end and the lower end of the soil throwing frame 32 are rotatably clamped with cleaning brush sleeves 324 sleeved outside the lifting screw rods 35 at corresponding positions.
Example 8
This example describes an ex-situ thermal desorption method for treatment of pesticide contaminated sites using the apparatus of example 7, comprising the steps of:
s1, respectively connecting an intermittent motor 160, a rotary motor 22, a blanking motor 25, a crushing motor 260, an infrared radiation pipe 28, a heating fan 30, a lifting motor 33 and an electric push rod 34 with an external power supply;
s2, starting a rotating motor 22, a blanking motor 25, a crushing motor 260, an infrared radiation heat pipe 28 and a heating fan 30, driving each blanking spiral 24 to rotate by using the blanking motor 25, and driving the rotating rollers 21 to rotate by using the rotating motor 22, so that the steel crawler 23 rotates around the two rotating rollers 21; digging the soil in the pesticide polluted site into a feed hopper 20, uniformly dropping the polluted soil into the second box body 11 under the action of a material spiral 24, enabling the polluted soil to fall on a steel crawler 23 firstly, enabling the polluted soil to enter one of the heating cavities 15 in the first box body 11 through a feed hole 100 under the conveying action of the steel crawler 23, starting an intermittent motor 160, and driving the intermittent screw 160 to rotate by utilizing the intermittent motor 160, so that the second box body 11 moves on a sliding beam 16, and further throwing the polluted soil into each heating cavity 15; during the process that the polluted soil falls on the steel caterpillar 23, the polluted soil is crushed by the crushing roller 26; during the rotation process of the steel crawler 23, the grate 27 is used for cleaning large-particle impurities in the soil, and the impurities are discharged out of the second box 11 through the impurity discharging hopper 270; and the polluted soil is preheated by the infrared auxiliary heat pipe 28;
s3, shielding each feeding hole 100 by using a sealing push-pull plate 17, spraying hot air generated by a heating fan 30 into polluted soil through an air spraying disc 31, and heating the soil to 230 ℃; the volatile harmful gases in the soil thermal desorption process are discharged out of the first box body 10 through the exhaust pipe 14 for collection;
s4, in the soil thermal desorption process, starting a lifting motor 33, driving an output shaft 330 to rotate through the lifting motor 33, and enabling a lifting screw rod 35 to rotate by utilizing the meshing action of a second bevel gear 331 and a first bevel gear 350; the soil throwing frame 32 moves up and down along the inner wall of the first box 10 under the action of the lifting screw 35; in the process of lifting the soil throwing frame 32, the electric push rod 34 is utilized to drive the pushing plate 323 to move, so that the pulling plate 322 pulls the connecting shaft 321, and finally, each rotary baffle 320 is in a horizontal position; when the soil throwing frame 32 rises to the highest point, the electric push rods 34 are utilized to adjust each rotary baffle 320 to the vertical position, so that the polluted soil naturally falls; in the process of moving the soil throwing frame 32 up and down, the cleaning brush sleeve 324 moves along with the soil throwing frame 32 and rotates on the lifting screw rod 35 to clean soil particles attached to the lifting screw rod 35;
and S5, repeating the step S4 8 for a plurality of times, and finally discharging the soil subjected to thermal desorption treatment out of the first box body 10 through the discharge chute 13.
It should be noted that, the intermittent motor 160, the rotary motor 22, the blanking motor 25, the pulverizing motor 260, the infrared radiant tube 28, the heating fan 30, the lifting motor 33 and the electric push rod 34 all adopt the prior art, and are not limited herein, and corresponding products can be selected according to actual needs.
Claims (10)
1. The off-site thermal desorption equipment for treating the pesticide polluted site is characterized by comprising a box body (1), a feeding component (2) and a thermal desorption component (3), wherein the feeding component (2) and the thermal desorption component (3) are arranged in the box body (1); the box body (1) comprises a first box body (10) arranged on a base and a second box body (11) arranged at the upper end of the first box body (10); the inner bottom of the first box body (10) is provided with a separation net (12), and the side wall is provided with a discharge chute (13) and an exhaust pipe (14); the lower end of the second box body (11) is provided with a discharge hole (110) communicated with the first box body (10);
the feeding assembly (2) comprises a feeding hopper (20) arranged on the upper end face of the second box body (11), two rotating rollers (21) horizontally arranged in the second box body (11) in parallel and a rotating motor (22) arranged on the side wall of the second box body (11) and used for providing power for one rotating roller (21); the two rotating rollers (21) are respectively and rotatably clamped at two sides of the interior of the second box body (11), and steel tracks (23) are wound on the two rotating rollers (21);
the thermal desorption assembly (3) comprises a heating fan (30) arranged on a base, an air injection disc (31) arranged at the inner bottom of the first box body (10) and connected with the heating fan (30) through a guide pipe (310), a soil throwing frame (32) movably clamped in the first box body (10) and a lifting motor (33) arranged on the side wall of the first box body (10) and used for providing power for the soil throwing frame (32); a plurality of rotary baffles (320) are distributed in the soil throwing frame (32) at equal intervals, each rotary baffle (320) is rotationally clamped with the soil throwing frame (32), one end of each rotary baffle (320) penetrates through the soil throwing frame (32) through a connecting shaft (321), a pull plate (322) is vertically arranged at the end part of each connecting shaft (321), the lower end of each pull plate (322) is slidably clamped through a pushing plate (323), and an electric push rod (34) connected with the pushing plate (323) is arranged on the lower bottom surface of the soil throwing frame (32); lifting lead screws (35) which are in threaded connection with the soil throwing frames (32) are rotationally clamped at four corners of the inside of the first box body (10), and first bevel gears (350) are arranged outside the lifting lead screws (35); the lifting motors (33) are arranged, output shafts (330) of the two lifting motors (33) horizontally penetrate through the first box body (10), and second bevel gears (331) in meshed connection with the first bevel gears (350) are sleeved outside the two output shafts (330).
2. The ectopic thermal desorption device for treating the pesticide polluted site as claimed in claim 1 is characterized in that a plurality of heating cavities (15) are distributed in the first box body (10) at equal intervals, and feeding holes (100) are formed at the upper end of the first box body (10) and at positions corresponding to the heating cavities (15); the number of the air injection discs (31) and the soil throwing frames (32) is correspondingly consistent with the number of the heating cavities (15); the second box body (11) is in sliding clamping connection with the upper end of the first box body (10) through a sliding beam (16); an intermittent motor (160) is arranged at the end part of the sliding beam (16), and an intermittent screw rod (161) penetrating through the sliding beam (16) and in threaded connection with the second box body (11) is arranged on an output shaft of the intermittent motor (160).
3. The ectopic thermal desorption device for pesticide contaminated site treatment according to claim 1, wherein a plurality of blanking spirals (24) are distributed at the joint of the feed hopper (20) and the second box body (11) at equal intervals, the end parts of the blanking spirals (24) penetrate through the feed hopper (20) and are provided with connecting gears (240), the connecting gears (240) are in chain transmission, and a blanking motor (25) for providing power for one of the connecting gears (240) is arranged on the upper end surface of the second box body (11).
4. The ectopic thermal desorption device for pesticide contaminated site treatment according to claim 1, wherein a crushing roller (26) is rotatably clamped at the lower end of the feed hopper (20) and inside the second box body (11), and a crushing motor (260) for providing power for the crushing roller (26) is arranged on the side wall of the second box body (11).
5. The ectopic thermal desorption device for pesticide contaminated site treatment as claimed in claim 4, wherein a grate (27) which is abutted with the upper end face of the steel caterpillar band (23) is arranged at one end of the inner top of the second box body (11) far away from the crushing roller (26); and a trash discharging hopper (270) is arranged on the side wall of the second box body (11) and at the position corresponding to the grate (27).
6. An off-site thermal desorption apparatus for the treatment of pesticide contaminated sites according to claim 1, wherein an infrared radiation pipe (28) is provided on the inner wall of the second casing (11) between the two rotating rolls (21).
7. The ectopic thermal desorption device for pesticide contaminated site treatment according to claim 1, wherein the upper end and the lower end of the soil throwing frame (32) are rotatably clamped with cleaning brush sleeves (324) sleeved outside lifting screws (35) at corresponding positions.
8. An off-site thermal desorption apparatus for treatment of pesticide contaminated sites according to claim 1, wherein a sealing push-pull plate (17) is provided on the first casing (1) in correspondence with each of the feed holes (100).
9. An ex-situ thermal desorption method for treating a pesticide contaminated site using the apparatus according to any one of claims 1 to 8, comprising the steps of:
s1, respectively connecting a rotating motor (22), a heating fan (30), a lifting motor (33) and an electric push rod (34) with an external power supply;
s2, starting a rotating motor (22) and a heating fan (30), and driving the rotating rollers (21) to rotate by using the rotating motor (22), so that the steel crawler belt (23) rotates around the two rotating rollers (21); digging soil in a pesticide contaminated site, putting the soil into the second box body (11) through a feed hopper (20), enabling the soil to fall on a steel crawler belt (23) firstly, and then enabling the soil to enter the first box body (10) through a feed hole (100) under the conveying action of the steel crawler belt (23);
s3, hot air generated by a heating fan (30) is sprayed into the polluted soil through an air spraying disc (31), and the soil is heated to 160-230 ℃; the volatile harmful gases in the soil thermal desorption process are discharged out of the first box body (10) through the exhaust pipe (14) for collection;
s4, in the soil thermal desorption process, starting a lifting motor (33), driving an output shaft (330) to rotate through the lifting motor (33), and enabling a lifting screw rod (35) to rotate by utilizing the meshing action of a second bevel gear (331) and a first bevel gear (350); the soil throwing frame (32) moves up and down along the inner wall of the first box body (10) under the action of the lifting screw rod (35); in the ascending process of the soil throwing frame (32), the electric push rod (34) is used for driving the pushing plate (323) to move, so that the pulling plate (322) pulls the connecting shaft (321) and finally each rotary baffle plate (320) is positioned at the horizontal position; when the soil throwing frame (32) rises to the highest point, the electric push rods (34) are utilized to adjust each rotary baffle plate (320) to the vertical position, so that the polluted soil naturally falls;
and S5, repeating the step S4 4-8 times, and finally discharging the soil subjected to thermal desorption treatment out of the first box body (10) through the discharge chute (13).
10. An off-site thermal desorption apparatus for the treatment of pesticide contaminated sites according to claim 1, wherein the second tank (11) is provided with an infrared radiation pipe (28).
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