CN213162440U

CN213162440U - A soil thermal desorption device for restoreing mercury pollution

Info

Publication number: CN213162440U
Application number: CN202021950665.6U
Authority: CN
Inventors: 孙瑛; 雷景堂; 吕相明
Original assignee: Beikuangcheng Ecological Technology Group Co ltd
Current assignee: Beikuangcheng Ecological Technology Group Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-05-11
Anticipated expiration: 2030-09-08

Abstract

The application relates to a soil thermal desorption device for repairing mercury pollution, which comprises a rotary kiln for heating soil, wherein a kiln head part of the rotary kiln is also provided with a feeding mechanism for feeding materials into the rotary kiln; the feeding mechanism comprises a feeding hopper, a crushing box is arranged below the feeding hopper, a crushing assembly is arranged in the crushing box, and a spiral feeder is arranged below the crushing box; broken subassembly is including mutual parallel arrangement and with broken case rotate the initiative crushing roller and the driven crushing roller of being connected, and coaxial rigid coupling has a driving gear on the initiative crushing roller, and coaxial rigid coupling has the driven gear with driving gear meshing on the driven crushing roller, and broken incasement still rigid coupling has a driving motor, and coaxial rigid coupling has a drive gear on driving motor's the output shaft, drive gear and driving gear intermeshing. This application has the effect that improves the inside pollution component's of caking soil volatilization speed.

Description

A soil thermal desorption device for restoreing mercury pollution

Technical Field

The application relates to the field of heavy metal pollution prevention and treatment, in particular to a soil thermal desorption device for repairing mercury pollution.

Background

Mercury plays an important role in modern production, especially in chlor-alkali, plastics, electronics industries. If the waste water discharged in the production process of the industries is not treated in place, the mercury pollution of water and soil resources can be caused when the waste water flows into the natural environment.

In the existing mercury pollution treatment of soil, soil is treated by a thermal desorption method, and the mercury-containing soil is directly or indirectly heated, so that pollution components in the soil are evaporated and separated from the soil, and the soil purification effect is achieved.

However, the soil is partially agglomerated before being heated, so that the inside of the agglomerated soil is heated unevenly, thereby affecting volatilization of the pollutant components in the agglomerated soil.

SUMMERY OF THE UTILITY MODEL

In order to improve the inside contaminated component's of caking soil volatilization speed, this application provides a soil thermal desorption device for restoreing mercury pollution.

The application provides a soil thermal desorption device for repairing mercury pollution adopts following technical scheme:

a soil thermal desorption device for repairing mercury pollution comprises a rotary kiln for heating soil, wherein a feeding mechanism for feeding materials into the rotary kiln is further arranged at the kiln head part of the rotary kiln; the feeding mechanism comprises a feeding hopper, a crushing box is arranged below the feeding hopper, a crushing assembly is arranged in the crushing box, and a spiral feeder is arranged below the crushing box;

broken subassembly is including mutual parallel arrangement and with broken case rotate initiative crushing roller and the driven crushing roller of being connected, and coaxial rigid coupling has a driving gear on the initiative crushing roller, and coaxial rigid coupling has the driven gear with driving gear meshing on the driven crushing roller, and broken incasement still rigid coupling has a broken motor, and coaxial rigid coupling has a drive gear on broken motor's the output shaft, drive gear and driving gear intermeshing.

Through adopting above-mentioned technical scheme, when broken motor during operation, drive gear rotates, and then drives driving gear and driven gear meshing in proper order and rotate to initiative crushing roller and driven crushing roller rotate with opposite direction, and will be located the soil block of initiative crushing roller and driven crushing roller top and bring into between initiative crushing roller and the driven crushing roller and by initiative crushing roller and driven crushing roller roll crushing. The setting of broken subassembly is smashed the part of caking in the soil to on the one hand made things convenient for in the feed screw sent soil into the rotary kiln, on the other hand's soil block has made things convenient for the rotary kiln to heat soil by broken back, has improved the homogeneity of rotary kiln to the heating efficiency and the heating of soil, further accelerated the spill over of former caking soil inside pollutants.

Optionally, the peripheral surfaces of the driving crushing roller and the driven crushing roller are fixedly connected with hemispherical bulges, and the bulges on the driving crushing roller and the bulges on the driven crushing roller are arranged in a staggered manner.

Through adopting above-mentioned technical scheme, the crisscross setting of arch on initiative crushing roller and the driven crushing roller global has increased the ability of snatching the clod to make broken subassembly more carefully to the clod is broken.

Optionally, a partition plate is arranged inside the crushing box, the partition plate divides the crushing box into a working cavity and a power cavity, the working cavity and the power cavity are used for rolling and crushing blocky soil, and the crushing motor, the driving gear and the driven gear are all located in the power cavity.

Through adopting above-mentioned technical scheme, the setting of baffle for work portion and power part in the broken case are by baffle alternate segregation, have reduced soil and have influenced the condition emergence of normal transmission between the gear. The stability of the work of the crushing assembly is improved.

Optionally, the periphery of broken case is provided with a fixed frame, and the lateral wall rigid coupling of broken case has the edge of taking with the fixed frame overlap joint each other, and the rigid coupling has the mount that is used for placing on ground under the fixed frame, is provided with the vibrations subassembly that is used for driving broken case and is reciprocating motion on the mount.

Through adopting above-mentioned technical scheme, through taking along and the mutual screens of fixed frame for broken case detachable places in fixed frame and the crushing roller can be driven by vibrations subassembly. The convenience of installing and detaching the crushing box and the fixed frame is improved by the arrangement of the lapping edges.

Optionally, the two vibration assemblies are arranged on two sides of the crushing box respectively, each vibration assembly comprises a connecting rod arranged on the side wall of one side of the crushing box, two ends of each connecting rod are provided with an eccentric wheel, the eccentric wheels are rotatably connected with the fixing frame, a rotating shaft is fixedly connected to the positions, deviating from the rotating axes of the eccentric wheels and the fixing frame, of the eccentric wheels, two ends of each corresponding connecting rod are respectively provided with a rotating hole for allowing the rotating shaft to penetrate through and rotatably connected with the rotating shaft, and the distance between the two rotating holes is equal to the distance between the rotating shafts on the two eccentric wheels;

a linkage component for synchronously driving the eccentric wheels on the two vibration components to rotate is also arranged between the two vibration components

Through adopting above-mentioned technical scheme, when the eccentric wheel rotated, another eccentric wheel of connecting rod drive rotated, because the connecting rod is mutual butt with broken case lateral wall this moment to the connecting rod drives broken case reciprocating motion. The setting of vibrations subassembly for broken case when carrying out the roll crush to soil, vibrations subassembly shakes to broken incasement, thereby made things convenient for soil to fall into the screw feeder by broken case inside, thereby improved the speed that broken incasement soil charge flows, improved work efficiency, reduced the soil charge and blockked up in broken chamber exit, the slow condition of unloading.

Optionally, the linkage assembly comprises two chain wheels, the two chain wheels are respectively coaxially and fixedly connected to eccentric wheels which are positioned on the same side of the crushing box in the two vibration assemblies, a chain is further sleeved on the two chain wheels, and one chain wheel is provided with a driving motor for driving the chain wheels to rotate.

Through adopting above-mentioned technical scheme, the setting of linkage subassembly, two vibrations subassemblies are transmitted through chain and sprocket for two eccentric wheels can be synchronous under a driving motor's drive, open with fast opening and stop, thereby improved the stability of work.

Optionally, a plurality of rotating rollers are embedded in one surface of the fixing frame, which faces the lapping edge, and the rotating shaft of each rotating roller is axially parallel to the length direction of the connecting rod.

Through adopting above-mentioned technical scheme, through the rotation of live-rollers, improved take along and the mount between the convenience of sliding to the convenience of vibrations of the broken case of vibrations has been improved to vibrations subassembly drive.

Optionally, a receiving pipe is arranged on one side of the spiral feeder, which faces the crushing box, a discharge port is arranged below the corresponding crushing box, and the discharge port is smaller than the receiving pipe.

Through adopting above-mentioned technical scheme, the discharge gate setting that the admission pipe is greater than broken case for the maximum speed that broken case was arranged is less than the maximum speed of admission pipe to the screw feeder pay-off, and then reduces the condition emergence that soil blockked up in admission pipe department.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the uniformity of soil blocks entering the rotary kiln is improved, and the soil blocks in the soil are crushed through rolling of the crushing assembly, so that the uniformity of the rotary kiln for heating the soil is improved;

2. through the vibrations of vibrations subassembly to broken case, made things convenient for the clod in the broken incasement to fall into the screw feeder, improved the stability of broken subassembly work.

Drawings

FIG. 1 is a schematic diagram of the operation of a thermal soil desorption device;

FIG. 2 is a schematic view showing the overall structure of the feeding mechanism;

FIG. 3 is a schematic view showing the internal structure of the crushing box;

fig. 4 is a schematic structural diagram of a vibration assembly.

Description of reference numerals: 1. a feeding mechanism; 11. a hopper; 12. a crushing box; 121. a partition plate; 122. a working chamber; 123. a power cavity; 13. a screw feeder; 14. a receiving tube; 2. a rotary kiln; 21. a bag-type dust collector; 22. a delivery box; 23. a finished product warehouse; 24. a water treatment tank; 25. an activated carbon adsorption tower; 26. a plate filter press; 3. a crushing assembly; 31. an active crushing roller; 311. a protrusion; 32. a driven crushing roller; 33. a driving gear; 34. a driven gear; 35. a crushing motor; 36. a drive gear; 37. a fixing frame; 371. a rotating roller; 38. a fixed mount; 39. lapping; 4. a vibration assembly; 41. an eccentric wheel; 42. a rotating shaft; 43. a connecting rod; 431. rotating the hole; 5. a linkage assembly; 51. a sprocket; 52. a chain; 6. the motor is driven.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a soil thermal desorption device for restoring mercury pollution. Referring to fig. 1, the rotary kiln comprises a rotary kiln 2 for heating soil, a feeding mechanism 1 for feeding materials into the rotary kiln 2 is arranged at the kiln head part of the rotary kiln 2, a bag-type dust collector 21 for absorbing smoke dust in tail gas generated after soil heating is communicated with the rotary kiln 2, and the heated soil is discharged from the kiln tail of the rotary kiln 2. The kiln tail department of kiln hood cover is provided with the delivery box 22 that is used for transporting the soil after the heating, is provided with the conveyer belt in the delivery box 22, and the other end of delivery box 22 is provided with the finished product storehouse 23 that is used for storing the soil after the processing, and the conveyer belt transports soil to in the finished product storehouse 23.

As shown in fig. 1, a water treatment tank 24 for absorbing mercury-containing impurities in the tail gas is disposed at the end of the bag-type dust collector 21, and an air outlet pipe of the bag-type dust collector 21 extends into the bottom of the water treatment tank 24. Water is filled in the water treatment tank 24, and metered sodium sulfide is put into the water, mercury and compounds thereof in the tail gas react with the sodium sulfide to generate mercury sulfide precipitate, so that the mercury sulfide is removed from the tail gas. The tail gas passes through a water treatment tank 24, enters an activated carbon adsorption tower 25, is further adsorbed and treated, and is then discharged. The water in the water treatment tank 24 and the insoluble impurities enter the plate filter press 26 together, so that the insoluble impurities containing mercury are pressed into filter cakes, and the pressed water flows back to the water treatment tank for reuse.

As shown in fig. 2, a part of the soil is in a block shape before entering the rotary kiln 2, which is not beneficial to the uniform heating of the rotary kiln 2 to the soil. In order to optimize the problem, a crushing assembly 3 for crushing the block soil is arranged in the feeding mechanism 1.

The feeding mechanism 1 comprises a feeding hopper 11, a crushing box 12 is arranged below the feeding hopper 11, a feeding port is arranged above the crushing box 12, a discharging port is arranged below the crushing box 12, soil enters the crushing box 12 through the feeding hopper 11, soil blocks are rolled and crushed by a crushing assembly 3 inside the crushing box 12, and the crushed soil is discharged from the discharging port. A screw feeder 13 is provided below the crushing box 12. The feed end of the screw feeder 13 is located below the crushing box 12, and the screw feeder 13 is disposed toward the rotary kiln 2. A receiving pipe 14 is further fixedly connected to one side, facing the crushing box 12, of the feeding end of the spiral feeding machine 13, an expanding opening is formed in one end, facing the discharging opening of the crushing box 12, of the receiving pipe 14, and the receiving pipe 14 is larger than the discharging opening of the crushing box 12, so that the maximum discharging speed of the crushing box 12 is smaller than the maximum feeding speed of the receiving pipe 14 to the spiral feeding machine 13, and the situation that soil is blocked at the receiving pipe 14 is reduced.

As shown in fig. 3, a partition plate 121 is fixed in the crushing box 12, and the crushing box 12 is divided into a working chamber 122 and a power chamber 123 by the partition plate 121. Working chamber 122 top is the opening setting and is located hopper 11 under, crushing unit 3 is including rotating initiative crushing roller 31 and the driven crushing roller 32 of connecting in working chamber 122, the rotation axis level setting of initiative crushing roller 31 and driven crushing roller 32, initiative crushing roller 31 and driven crushing roller 32 are located the tip that is with one side and penetrate power chamber 123, the coaxial rigid coupling of tip that initiative crushing roller 31 is located power chamber 123 has a driving gear 33, the coaxial rigid coupling of tip that driven crushing roller 32 is located power chamber 123 has a driven gear 34, driving gear 33 and driven gear 34 intermeshing, still the rigid coupling has a crushing motor 35 in the power chamber 123, coaxial rigid coupling has a drive gear 36 on crushing motor 35's the output shaft, drive gear 36 and driving gear 33 intermeshing. When the crushing motor 35 is operated, the driving gear 36 rotates, which in turn drives the driving gear 33 to rotate in mesh with the driven gear 34, so that the driving crushing roller 31 and the driven crushing roller 32 rotate in opposite directions, and soil blocks located above the driving crushing roller 31 and the driven crushing roller 32 are brought between the driving crushing roller 31 and the driven crushing roller 32 and crushed by the driving crushing roller 31 and the driven crushing roller 32. The setting of broken subassembly 3 is smashed the part of caking in the soil to on the one hand made things convenient for feed screw 13 to send into rotary kiln 2 with soil in, the clod of on the other hand has made things convenient for rotary kiln 2 to heat soil by broken back, has improved the homogeneity of rotary kiln 2 to the heating efficiency and the heating of soil. Due to the arrangement of the partition plates 121, the working part and the power part in the crushing box 12 are separated from each other by the partition plates 121, and the condition that soil influences normal transmission between gears is reduced. The stability of the operation of the crushing module 3 is improved. All the rigid couplings have a plurality of hemispherical archs 311 on the global of initiative crushing roller 31 and driven crushing roller 32, a plurality of protruding 311 evenly distributed are on two kinds of crushing roller global, and crisscross the setting each other between the protruding 311 on the initiative crushing roller and the protruding 311 on the driven crushing roller 32, and the protruding 311 on initiative crushing roller 31 and the driven crushing roller 32 global is crisscross to be set up, has increased the ability of snatching the clod, and make broken subassembly 3 more meticulous to the clod crushing.

As shown in fig. 4, a fixing frame 37 for receiving the crushing box 12 is provided on the outer side of the crushing box 12, a fixing frame 38 for supporting the fixing frame 37 is fixedly connected to the fixing frame 37 at a side facing the ground, and the fixing frame 38 is placed on the ground. The inboard lateral wall that is located broken case 12 length direction both ends of fixed frame 37 and broken case 12 butt, and the lateral wall interval that fixed frame 37 inboard is located broken case 12 width direction both ends is greater than the width of broken case 12 to make when broken case 12 is put into fixed frame 37 inside, leave the space between two lateral walls that are located the width direction both ends of broken case 12 and the relative inner wall of fixed frame 37. A lap 39 is further fixed to the outer side wall of the crushing box 12, and the lap 39 is lapped on the upper surface of the fixed frame 37 to fix the crushing box 12 to the fixed frame 37.

As shown in fig. 4, the fixing frame 38 is further provided with a vibration assembly 4 for vibrating the crushing box 12, so that soil can fall from the crushing box 12 into the screw feeder 13 conveniently, the vibration assembly 4 includes two eccentric wheels 41 rotatably connected to the fixing frame 38, the two eccentric wheels 41 are arranged along the length direction of the crushing box 12 and located at two ends of the crushing box 12, the eccentric wheels 41 are vertically arranged with the axis of the rotating shaft of the fixing frame 38 and are in a coaxial state with the eccentric wheels 41, a rotating shaft 42 is fixedly connected to the eccentric wheels 41 at a position deviating from the center of the eccentric wheels 41, a connecting rod 43 is arranged between the two eccentric wheels 41, two ends of the connecting rod 43 are respectively provided with a rotating hole 431, the rotating shaft 42 passes through the rotating hole 431 and is rotatably connected with the rotating hole 431, and the distance between the two. The connecting rod 43 is fixedly connected with the outer side wall of the crushing box 12. The vibrating assembly 4 is provided with two connecting rods 43 along the width direction of the crushing box 12, and the two connecting rods 43 are respectively positioned at two sides of the crushing box 12 and abut against the corresponding side walls of the crushing box 12. A linkage assembly 5 for simultaneously driving the eccentric wheels 41 in the two crushing assemblies 3 to rotate is further arranged between the two vibrating assemblies 4, the linkage assembly 5 comprises two chain wheels 51, a chain 52 is simultaneously sleeved on the two chain wheels 51, the two chain wheels 51 are respectively matched with the two vibrating assemblies 4 and coaxially and fixedly connected with the eccentric wheels 41, and the eccentric wheels 41 fixedly connected with the chain wheels 51 are positioned on the same side of the crushing box 12. One of the chain wheels 51 is further provided with a driving motor 6, the body of the driving motor 6 is fixedly connected to the fixing frame 38, and the output end of the driving motor 6 is coaxially and fixedly connected to the chain wheel 51.

When the driving motor 6 rotates, the driving motor 6 drives the chain wheel 51 to rotate, and further drives the eccentric wheels 41 in the two vibration assemblies 4 to rotate simultaneously through the transmission action of the chain 52. When the eccentric 41 rotates, the connecting rod 43 drives the other eccentric 41 to rotate, and at this time, the connecting rod 43 drives the crushing box 12 to reciprocate because the connecting rod 43 and the side wall of the crushing box 12 are abutted against each other. Vibrations subassembly 4 for broken case 12 when carrying out the roll crushing breakage to soil, vibrations subassembly 4 shakes in to broken case 12, thereby made things convenient for soil to fall into screw feeder 13 by broken case 12 inside, thereby improved the speed that the interior soil charge of broken case 12 flows, improved work efficiency, reduced the soil charge and blockked up in broken chamber exit, the slow condition of unloading. Due to the arrangement of the linkage assembly 5, the two vibration assemblies 4 are driven by the chain 52 and the chain wheel 51, so that the two eccentric wheels 41 can be synchronously started and stopped at the same speed under the driving of one driving motor 6, and the working stability is improved.

In order to reduce the friction between the lapping edge 39 and the fixed frame 37 when the crushing box 12 vibrates, a plurality of rotating rollers 371 are further arranged on one side of the fixed frame 37 facing the lapping edge 39, the rotating rollers 371 are partially embedded in the fixed frame 37, the rotating shaft axes of the rotating rollers 371 are horizontally arranged, the axial direction of the rotating rollers 371 is parallel to the length direction of the connecting rod 43, and the peripheral surface of the rotating rollers 371 is protruded on the upper surface of the fixed frame 37. The lap 39 is lapped on the circumferential surface of the turning roller 371, and received by the turning roller 371. However, when the crushing box 12 is driven by the vibration assembly 4 to vibrate back and forth, the abrasion between the lapping edge 39 and the upper surface of the fixed frame 37 is reduced through the rotating action of the rotating roller 371, and the working stability of the crushing box 12 is improved.

The principle of the embodiment is as follows: when soil thermal desorption device carries out the demercuration to soil and handles, firstly in the staff will treat the soil of purifying and put into hopper 11 at first, the soil in the hopper 11 falls into broken case 12 to the lug in the soil is by the breakage, shakes 4 reciprocal sways of broken case 12 of the work drive of subassembly this moment, and the soil of being convenient for falls into in screw feeder 13. The spiral feeder 13 feeds soil into the rotary kiln 2 to be heated, the soil is heated to 500 ℃ in the rotary kiln 2, mercury and compounds in the soil are converted into gas and discharged from the soil in the heating process, tail gas and micro dust generated by soil heating enter the bag-type dust remover 21 to be subjected to dust removal and filtration, and the heated soil is discharged from the kiln tail of the rotary kiln 2 and conveyed by the conveying belt in the conveying box 22 to be conveyed to the finished product bin 23 to be stored. After the bag-type dust collector 21 filters dust in the tail gas, the tail gas is introduced into the water treatment tank 24, water added with sodium sulfide is filled in the water treatment tank 24, the tail gas is contacted with the sodium sulfide, mercury and compounds in the tail gas react with the sodium sulfide and are converted into insoluble precipitates to be reserved in the water treatment tank 24, gas which is remained in the tail gas and does not react with the sodium sulfide is discharged after passing through the water treatment tank 24 and enters the activated carbon adsorption tower 25 for further adsorption and purification treatment, and the gas is discharged to the atmosphere after the treatment is finished. The water and the insoluble precipitate in the water treatment pool 24 enter a plate type filter press 26 together, insoluble impurities are pressed into filter cakes for subsequent treatment, and the filtered water flows back to the water treatment pool 24 through a pipeline again for recycling.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A soil thermal desorption device for repairing mercury pollution, includes rotary kiln (2) that is used for heating soil, its characterized in that: the kiln head part of the rotary kiln (2) is provided with a feeding mechanism (1) for feeding materials into the rotary kiln (2); the feeding mechanism (1) comprises a feeding hopper (11), a crushing box (12) is arranged below the feeding hopper (11), a crushing assembly (3) is arranged in the crushing box (12), and a spiral feeding machine (13) is arranged below the crushing box;

broken subassembly (3) including mutual parallel arrangement and with broken case (12) rotate initiative crushing roller (31) and driven crushing roller (32) of being connected, coaxial rigid coupling has a driving gear (33) on initiative crushing roller (31), coaxial rigid coupling has driven gear (34) with driving gear (33) meshing on driven crushing roller (32), still the rigid coupling has a broken motor (35) in broken case (12), coaxial rigid coupling has a drive gear (36) on the output shaft of broken motor (35), drive gear (36) and driving gear (33) intermeshing.

2. The thermal desorption device for remediating mercury contaminated soil as recited in claim 1, wherein: hemispherical bulges (311) are fixedly connected on the peripheral surfaces of the driving crushing roller (31) and the driven crushing roller (32), and the bulges (311) on the driving crushing roller (31) and the bulges (311) on the driven crushing roller (32) are arranged in a staggered mode.

3. The thermal desorption device for remediating mercury contaminated soil as recited in claim 1, wherein: a partition plate (121) is arranged inside the crushing box (12), the crushing box (12) is divided into a working cavity (122) and a power cavity (123) by the partition plate (121), the working cavity is used for rolling and crushing blocky soil, and the crushing motor (35), the driving gear (36), the driving gear (33) and the driven gear (34) are all located in the power cavity (123).

4. The thermal desorption device for remediating mercury contaminated soil as recited in claim 1, wherein: the periphery of broken case (12) is provided with a fixed frame (37), and the lateral wall rigid coupling of broken case (12) has and takes along (39) with fixed frame (37) overlap joint each other, and fixed frame (37) lower surface rigid coupling has and is used for placing mount (38) on ground, is provided with on mount (38) to be used for driving broken case (12) and is reciprocating motion's vibrations subassembly (4).

5. The thermal desorption device for remediating mercury contaminated soil as recited in claim 4, wherein: the vibration assembly (4) is provided with two vibration assemblies (4), the two vibration assemblies (4) are respectively positioned on two sides of the crushing box (12), each vibration assembly (4) comprises a connecting rod (43) arranged on the side wall of one side of the crushing box (12), two ends of each connecting rod (43) are respectively provided with an eccentric wheel (41), each eccentric wheel (41) is rotatably connected with the corresponding fixing frame (38), a rotating shaft (42) is fixedly connected to the position, deviating from the rotating axis of each eccentric wheel (41) and the corresponding fixing frame (38), of each eccentric wheel (41), rotating holes (431) for allowing the rotating shafts (42) to penetrate through and being rotatably connected with the rotating shafts (42) are respectively formed in two ends of the corresponding connecting rods (43), and the distance between the two rotating holes (431) is equal to the distance between the rotating shafts;

a linkage component (5) for synchronously driving the eccentric wheels (41) on the two vibration components (4) to rotate is also arranged between the two vibration components (4).

6. The thermal desorption device for remediating mercury contaminated soil as recited in claim 5, wherein: linkage subassembly (5) include two sprocket (51), and two sprocket (51) coaxial rigid coupling respectively lie in broken case (12) in two vibrations subassembly (4) on eccentric wheel (41) with one side, still overlap simultaneously on two sprocket (51) and be equipped with a chain (52), are provided with one and are used for driving sprocket (51) pivoted driving motor (6) on one of them sprocket (51).

7. The thermal desorption device for remediating mercury contaminated soil as recited in claim 5, wherein: the fixed frame (38) is embedded with a plurality of rotating rollers (371) towards one surface of the lapping edge (39), and the axial direction of the rotating shaft of the rotating rollers (371) is parallel to the length direction of the connecting rod (43).

8. The thermal desorption device for remediating mercury contaminated soil as recited in claim 1, wherein: a receiving pipe (14) is arranged on one side, facing the crushing box (12), of the spiral feeding machine (13), a discharging hole is arranged below the crushing box (12), and the discharging hole is smaller than the receiving pipe (14).