CN109772872B - Comprehensive soil remediation system polluted by organic matters and remediation method thereof - Google Patents
Comprehensive soil remediation system polluted by organic matters and remediation method thereof Download PDFInfo
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- CN109772872B CN109772872B CN201910048294.8A CN201910048294A CN109772872B CN 109772872 B CN109772872 B CN 109772872B CN 201910048294 A CN201910048294 A CN 201910048294A CN 109772872 B CN109772872 B CN 109772872B
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Abstract
The invention discloses a comprehensive soil remediation system polluted by organic matters and a remediation method thereof, and the comprehensive soil remediation system comprises a feeding device, a soil pretreatment device, a soil conveying device, a thermal desorption device, a gas combustion device and a preheating device, wherein a feeding port of the soil pretreatment device is communicated with a discharging port of the feeding device, the discharging port of the soil pretreatment device is arranged corresponding to the feeding port of the soil conveying device, soil particles are flatly laid on the soil conveying device, the soil conveying device is provided with the thermal desorption device, the thermal desorption device is used for thermally desorbing the soil particles on the conveying device, a gas inlet of the gas combustion device is arranged corresponding to the thermal desorption device, the gas combustion device is used for collecting and combusting volatile gas thermally desorbed by the thermal desorption device, the gas combustion device is used for heating the preheating device, and the hot end part of the preheating device is arranged in the feeding device, and the preheating device preheats dry soil particles, so that the soil polluted by organic matters can be sufficiently repaired.
Description
Technical Field
The invention belongs to the field of soil remediation, and particularly relates to a comprehensive soil remediation system polluted by organic matters and a remediation method thereof.
Background
Soil remediation refers to the physical, chemical and biological processes used to transfer, absorb, degrade and transform pollutants in soil to reduce their concentration to acceptable levels, or to transform toxic and harmful pollutants into harmless materials. In recent years, with the adjustment of economic structures and the acceleration of urbanization processes in China, a large number of chemical plants migrate out of urban areas, leave a large number of polluted sites, and bring harm to ecological environment and human health. Therefore, the treatment of the polluted soil becomes an important content for environmental protection, and the remediation and treatment of the organic polluted soil becomes an important task in the field of the treatment of the polluted soil.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the comprehensive soil remediation system and the remediation method thereof, which can be used for sufficiently remedying the soil polluted by organic matters.
The technical scheme is as follows: in order to achieve the purpose, the technical scheme of the invention is as follows:
a comprehensive soil remediation system polluted by organic matters comprises a feeding device, a soil pretreatment device, a soil conveying device, a thermal desorption device, a gas combustion device and a preheating device, the feed inlet of the soil pretreatment device is communicated with the discharge outlet of the feeding device, the discharge outlet of the soil pretreatment device is arranged corresponding to the feed inlet of the soil conveying device, soil particles are flatly paved on the soil conveying device, the soil conveying device is provided with a thermal desorption device which thermally desorbs soil particles on the conveying device, the gas inlet of the gas combustion device is arranged corresponding to the thermal desorption device, the gas combustion device collects and combusts the volatile gas thermally desorbed by the thermal desorption device, the gas combustion device heats the preheating device, the hot end part of the preheating device is arranged in the feeding device, and the preheating device preheats and dries soil particles.
Furthermore, the soil pretreatment device comprises a soil crushing shell and a crushing and separating mechanism arranged in an inner cavity of the soil crushing shell, the soil crushing shell is of a vertically arranged rectangular shell structure with two open ends, the top end of the soil crushing shell is communicated with a discharge hole of the feeding device, and the crushing and separating mechanism is correspondingly arranged below the feeding device;
the fragmentation divides the mechanism to include swing seat, broken splint and two-way actuating mechanism, the top of swing seat is rotated and is set up in the broken casing of soil, the axis of rotation of swing seat is the level setting, the bottom symmetry of swing seat is provided with broken splint, two broken splint set up respectively in the both sides of swing seat on the swing direction, broken splint set up and form the broken passageway of soil granule with the broken casing interval of the relative soil on the swing direction, just broken splint set up with the broken casing clearance of the ascending soil of perpendicular to swing direction, broken splint are for the reciprocating type collision motion of the wall body of the broken casing of soil, two-way actuating mechanism sets up the below at the swing seat, just two-way actuating mechanism sets up between two broken splint, two-way actuating mechanism drives the swing seat swing.
Further, swing seat is trapezoidal cross-section's massive structure, swing seat's tip sets up, broken splint are plate body column structure, just the length direction of broken splint sets up along swing seat's pivot direction, the vertical setting of width direction of broken splint, the bottom of broken splint contains hits garrulous portion, it is the shaping of buckling to one side of two-way actuating mechanism in the bottom of broken splint to hit garrulous portion, swing seat swings to one side under the state, hit the wall body contact or the clearance setting of garrulous portion and the broken casing of soil.
The soil crushing device further comprises a primary screening mechanism and a secondary screening mechanism which are arranged inside the soil crushing shell at an upper and lower interval, wherein the primary screening mechanism and the secondary screening mechanism are respectively arranged on the upper side and the lower side of the crushing mechanism, and the primary screening mechanism and the secondary screening mechanism are identical in structure; the secondary screening mechanism comprises a vibrating screen, elastic pieces, supporting pieces and connecting cables, the vibrating screen is transversely arranged in the soil crushing shell, the vibrating screen is connected to the swinging seat through the connecting cables, the connecting cables are respectively located on two sides of the swinging seat in the swinging direction, the vibrating screen is provided with the elastic pieces, and the elastic pieces are supported and arranged on the inner wall of the soil crushing shell through the supporting pieces; the vibrating screen vibrates along with the vibrating of the swinging seat.
Further, the upper and lower both sides of swing seat are provided with a set of photocatalysis subassembly respectively, swing seat is located the photocatalysis region that two sets of photocatalysis subassemblies formed, the photocatalysis subassembly contains the photocatalytic oxidation ware that a plurality of intervals set up, the photocatalytic oxidation ware includes quartz glass pipe and sets up the ultraviolet lamp in quartz glass pipe, quartz glass pipe's inner wall coating has the nanometer titanium dioxide layer, all be provided with the photocatalysis structure on the inner wall of the broken casing of soil, on the outer wall of swing seat, the photocatalysis structure is aluminium system network structure.
Further, two-way actuating mechanism includes fixing base, actuating mechanism, drive mechanism and cam drive wheel, the fixing base is fixed to be set up on the broken casing of soil of swing seat below, actuating mechanism sets up in the fixing base top, the cam drive wheel rotates and sets up on the fixing base, just the cam drive wheel passes through drive mechanism and is connected with the actuating mechanism drive, the cam drive wheel sets up between two broken splint, just but cam drive wheel pivoted state under the butt and drive broken splint skew.
Further, the cam driving wheel is an eccentric cam of a complete disc-shaped structure, the rotating shaft of the cam driving wheel is located on a center line of two crushing splints in a free sagging state, the maximum diameter of the cam driving wheel is smaller than the distance between the two crushing splints, the maximum eccentric radius of the cam driving wheel is smaller than the distance between the center line of the two crushing splints and the side wall of the soil crushing shell, and the crushing part at the bottom end of the crushing splint is arranged in a gap with the soil crushing shell in a limit position state.
Further, the thermal desorption device comprises a heat collection box body and a heating element arranged in the heat collection box body, the soil conveying device is a conveyor, the soil conveying device penetrates through the heat collection box body, and soil particles flatly laid on the soil conveying device penetrate through the heat collection box body and thermally desorb organic pollutants; the heat collection box body is provided with a plurality of gas collection pipes, one end of each gas collection pipe is communicated with the inner cavity of the heat collection box body, and the other end of each gas collection pipe is communicated with the gas combustion device.
Further, the gas combustion device comprises a combustion furnace, the preheating device comprises a heat absorption element, a heat conduction connector and a hot end heat dissipation piece, the heat absorption element is arranged in the combustion furnace, the hot end heat dissipation piece is arranged in the feeding device, the heat absorption element is connected with the hot end heat dissipation piece through the heat conduction connector, and the hot end heat dissipation piece preheats soil particles in the feeding device; the feeding device is internally provided with a plurality of crushing rotary rollers which are arranged at intervals horizontally, the hot end heat dissipation parts are of plate-shaped structures and are arranged between every two crushing rotary rollers in parallel, and soil particles turned by the crushing rotary rollers are scattered on the hot end heat dissipation parts.
A comprehensive remediation method for soil polluted by organic matters comprises the following steps:
s1: soil particles to be repaired enter from a feeding device and are crushed by a crushing roller to be subdivided into small crushed soil particles, the soil particles are preheated under the heating action of a hot end heat radiating piece, meanwhile, the water in the soil is evaporated, the soil particles are dried, meanwhile, the soil particles are continuously stirred under the rotation of the crushing roller, and the water in the soil particles is fully evaporated;
s2: the crushed and preheated soil particles are primarily screened by a primary screening mechanism, large sundries such as stones and the like are retained on a vibrating screen of the primary screening mechanism and are periodically cleaned, the soil particles passing through the vibrating screen of the primary screening mechanism pass through soil particle crushing channels on two sides of a swinging seat, the swinging seat is driven to horizontally swing by a bidirectional driving mechanism, the soil particles in the crushed soil particle crushing channels are impacted, and the primarily screened dry soil particles are further crushed; the soil particles crushed by the swing seat fall on the vibrating screens of the secondary screening mechanism for secondary screening, and meanwhile, the downward displacement speed of the soil particles is slowed down, and the retention time of the soil particles between the two vibrating screens is prolonged;
the vibrating screens in the primary screening mechanism and the secondary screening mechanism are connected to the swinging seat through connecting cables respectively, and through the left-right swinging of the swinging seat, the upper vibrating screen and the lower vibrating screen frequently vibrate and shake under the pulling action of the connecting cables, so that soil particles can pass through the vibrating screens;
s3: a plurality of groups of photocatalytic assemblies are arranged in the area between the two vibrating sieves, a photocatalytic area is formed between the two vibrating sieves, soil particles falling from the primary screening mechanism are scattered, polluted organic matters in the soil are fully oxidized and decomposed by the photocatalytic assemblies, meanwhile, the soil particles falling from the primary screening mechanism fall on the inclined plane at the upper part of the swinging seat, and the displacement path of the soil particles is increased; the soil particles passing through the soil particle crushing channel are further crushed and fall on a vibrating screen in the secondary screening mechanism, and the soil particles which are crushed again are subjected to photocatalytic treatment again through the photocatalytic component to oxidize polluted organic matters;
s4: soil particles passing through the secondary screening mechanism are displaced from the bottom end of the soil crushing shell to the soil conveying device and are displaced into the heat collecting box body, organic matters are polluted through thermal desorption of the thermal desorption device, organic volatile gas generated in the thermal desorption process enters the combustion furnace through the gas collecting pipe to be combusted, heat generated in the combustion process heats the heat absorbing element, heat on the heat absorbing element is transmitted to a hot end heat radiating piece in the feeding device through the heat conduction connecting piece, and the soil particles are preheated and dried through the hot end heat radiating piece.
Has the advantages that: according to the invention, the soil pretreatment device is used for carrying out pretreatment such as crushing and photocatalysis on soil particles, the thermal desorption device is used for carrying out thermal desorption treatment on soil, the generated volatile gas is combusted through the combustion furnace to generate heat, the preheating device is heated and dried, and the soil particles in the feeding device are evaporated, so that the soil particles in the feeding device are easy to crush and smash, the effective process of the soil particles in the thermal desorption process can be accelerated, and the waste gas energy can be recycled.
Drawings
FIG. 1 is a front view of the overall structure of the present invention;
FIG. 2 is a top view of the overall structure of the present invention;
FIG. 3 is a schematic view of the structure of the whole structure of the present invention in a half section from the A-A direction;
FIG. 4 is a schematic view of a half-section in the direction B-B of the overall structure of the present invention;
FIG. 5 is an enlarged view of a portion of the soil conditioning device of FIG. 3 according to the present invention;
FIG. 6 is an enlarged schematic view of a portion C of FIG. 3 according to the present invention;
fig. 7 is a schematic structural view of the bidirectional driving mechanism of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in the accompanying drawings 1 to 4, an organic matter contaminated soil comprehensive remediation system comprises a feeding device 1, a soil pretreatment device 2, a soil conveying device 3, a thermal desorption device 4, a gas combustion device 6 and a preheating device 7, wherein a feed inlet of the soil pretreatment device 2 is communicated with a discharge outlet of the feeding device 1, a discharge outlet of the soil pretreatment device 2 is correspondingly arranged with a feed inlet of the soil conveying device 3, soil particles are flatly laid on the soil conveying device 3, the thermal desorption device 4 is arranged on the soil conveying device 3, contaminated organic matters on the soil particles on the thermal desorption device 4 are desorbed from the conveying device 3, a waste gas inlet of the gas combustion device 6 is correspondingly arranged with the thermal desorption device 4, the gas combustion device 6 collects and burns volatile gas thermally desorbed from the thermal desorption device 4, the gas combustion device 6 heats the preheating device 7, the hot end part of the preheating device 7 is arranged in the feeding device 1, and the preheating device 7 preheats and dries soil particles. Carry out preliminary treatment such as breakage and photocatalysis to soil particle through soil preprocessing device, and carry out thermal desorption through thermal desorption device to soil and handle, the volatile gas of production produces the heat through firing burning furnace burning, heat preheating device, preheating device is heating and drying the soil particle in the feed arrangement, evaporate moisture in the soil, on the one hand, can make the soil particle in the feed arrangement more easily broken and the fragmentation, on the other hand can accelerate the effective process of soil particle in the thermal desorption process, can also make waste gas energy recycle, through the invention can carry out effectual breaking away from to the organic matter in the contaminated soil, reduce the pollutant content in the soil by a wide margin.
The soil pretreatment device 2 comprises a soil crushing shell 11 and a crushing mechanism arranged in an inner cavity of the soil crushing shell 11, the soil crushing shell 11 is of a vertically arranged rectangular shell structure with two open ends, the top end of the soil crushing shell 11 is communicated with a discharge hole of the feeding device 1, the feeding device 1 comprises a feed hopper and a plurality of crushing rotating rollers 23 arranged in the feed hopper, the crushing rotating rollers 23 are of a rotating roller structure with crushing teeth, the crushing rotating rollers are used for crushing soil particles, the crushing mechanism is correspondingly arranged below the feeding device 1, and the crushing mechanism is used for crushing and fragmenting the soil particles after passing through the feeding device 1 again;
the fragmentation mechanism comprises a swinging seat 10, a crushing clamp plate 13 and a two-way driving mechanism 12, the top end of the swinging seat 10 is rotatably arranged in a soil crushing shell 11, the rotating shaft of the swinging seat 10 is horizontally arranged, the bottom end of the swinging seat 10 is symmetrically provided with the crushing clamp plate 13, the length direction of the two crushing clamp plates is parallel to the rotating shaft of the swinging seat, the two crushing clamp plates 13 are respectively arranged at the two sides of the swinging seat 10 in the swinging direction, the crushing clamp plates 13 are arranged at intervals with the soil crushing shell 11 opposite to the swinging direction and form a soil particle crushing channel 15, the crushing clamp plates 13 are arranged at intervals with the soil crushing shell 11 perpendicular to the swinging direction, soil particles flowing downwards from the feeding device 1 can only pass through the soil crushing channel 15, and are crushed again and crushed into smaller soil particles through the two crushing clamp plates 13, the crushing splints 13 make reciprocating collision movement relative to the wall body of the soil crushing shell 11, the bidirectional driving mechanism 12 is arranged below the swinging seat 10 and between the two crushing splints 13, and the bidirectional driving mechanism 12 drives the swinging seat 10 to swing.
As shown in fig. 5 to fig. 7, the bidirectional driving mechanism 12 includes a fixing seat 123, a driving mechanism 121, a transmission mechanism 122 and a cam driving wheel 120, the driving mechanism 121 is a motor, the transmission mechanism 122 is a belt transmission mechanism, the fixing seat 123 is fixedly disposed on the soil crushing shell 11 below the swinging seat 10, the driving mechanism 121 is disposed above the fixing seat 123, the cam driving wheel 120 is rotatably disposed on the fixing seat 123, the cam driving wheel 120 is drivingly connected with the driving mechanism 121 through the transmission mechanism 122, the motor is operated to drive the cam driving wheel 120 to rotate, the cam driving wheel 120 is disposed between the two crushing clamp plates 13, and the cam driving wheel 120 can abut against and drive the crushing clamp plates 13 to shift to the soil crushing channels 15 on both sides in a rotating state.
As shown in fig. 7, the cam driving wheel 120 is an eccentric cam of a complete disc-shaped structure, and the rotating shaft 124 of the cam driving wheel is positioned on the middle line of the two crushing splints 13 in the freely drooping state, the maximum diameter of the cam driving wheel 120 is smaller than the distance between the two crushing splints 13, i.e. when the long axis of the cam driving wheel is vertical and is about to be vertical to the connecting line between the two crushing jaws, the cam driving wheel 120 is not in contact with the two crushing jaws in the displacement zone, and in the process, the two crushing jaws are returned under the inertia effect of the swinging seat 10, when the cam driving wheel contacts the crushing clamp plate 13 in a continuous rotation state, the cam driving wheel can generate a collision effect with the crushing clamp plate at the contact moment to increase the vibration capability of the swinging seat, meanwhile, the crushing clamp plate 13 has stronger collision with soil particles, so that the soil is easier to crush, and the crushing of the soil particles is more detailed; the maximum eccentric radius of the cam driving wheel 120 is smaller than the distance from the central line of the two crushing splints 13 to the side wall of the soil crushing shell 11, the crushing part 130 at the bottom end of the crushing splint 13 is arranged in a gap with the soil crushing shell 11 in the extreme position state, and the gap is used for preventing the crushing splint 13 from contacting with the wall body of the soil crushing shell 11, so that the stability of the soil crushing shell is ensured.
As shown in fig. 4, swing seat 10 is trapezoidal cross-section's massive structure, swing seat 10's tip sets up, broken splint 13 is plate body column structure, just broken splint 13's length direction sets up along swing seat 10's pivot direction, broken splint 13's the vertical setting of width direction, broken splint 13's bottom contains strikes garrulous portion 130, strike garrulous portion 130 for broken splint 10's bottom to the one side bending shaping of two-way actuating mechanism 12, swing seat 10 swings to a side state under, strike garrulous portion 130 and the wall body contact or the clearance setting of the broken casing of soil.
The soil crushing device is characterized by further comprising a primary screening mechanism and a secondary screening mechanism which are arranged inside the soil crushing shell 11 at an upper and lower interval, wherein the primary screening mechanism and the secondary screening mechanism are respectively arranged on the upper side and the lower side of the screening mechanism, and the primary screening mechanism and the secondary screening mechanism are identical in structure; the secondary screening mechanism comprises a vibrating screen 16, an elastic part 17, a supporting part 18 and connecting cables 14, the elastic part 17 is a spring, the connecting cables 14 are cables without elasticity, such as steel wire ropes and the like, the vibrating screen 16 is transversely arranged in the soil crushing shell 11, the vibrating screen 16 is connected to the swinging seat 10 through a plurality of connecting cables 14, a plurality of connecting cables 116 are respectively positioned on two sides of the swinging seat 10 in the swinging direction, the vibrating screen 16 is provided with a plurality of elastic parts 17, and the elastic parts 17 are supported and arranged on the inner wall of the soil crushing shell 11 through the supporting part 18; the supporting members 18 are fixed blocks, which are respectively disposed at four corners of the soil crushing shell, and the vibrating screen 16 vibrates along with the swinging of the swinging seat 10. The crushed and preheated soil particles are primarily screened by a primary screening mechanism, large stones and other impurities are retained on a vibrating screen of the primary screening mechanism and are periodically cleaned, the soil particles passing through the vibrating screen of the primary screening mechanism pass through soil particle crushing channels 15 on two sides of a swinging seat 10, the swinging seat 10 is driven by a bidirectional driving mechanism 12 to horizontally swing, the soil particles in the crushed soil particle crushing channels 15 are impacted, and the dried soil particles after primary screening are further crushed; the soil particles crushed by the swing seat 10 fall on the vibrating screens of the secondary screening mechanism for secondary screening, and meanwhile, the downward displacement speed of the soil particles is slowed down, and the retention time of the soil particles between the two vibrating screens is prolonged; the vibrating screens in the primary screening mechanism and the secondary screening mechanism are connected to the swing seat 10 through connecting cables 14 respectively, and through the left-right swing of the swing seat 10, the upper vibrating screen and the lower vibrating screen frequently vibrate and shake under the pulling action of the connecting cables 14, so that soil particles can pass through the vibrating screens.
The thermal desorption device 4 comprises a heat collection box body 24 and a heating element 21 arranged in the heat collection box body 24, the soil conveying device 3 is a conveyor, the soil conveying device 3 penetrates through the heat collection box body 24, soil particles flatly laid on the soil conveying device 3 penetrate through the heat collection box body 24, and organic pollutants are thermally desorbed; the heat collection box body 24 is provided with a plurality of gas collection pipes 5, one ends of the gas collection pipes 5 are communicated with the inner cavity of the heat collection box body 24, and the other ends of the gas collection pipes are communicated with the gas combustion device 6.
As shown in fig. 1 and 3, the gas combustion device 6 includes a combustion furnace 60, the combustion furnace 60 includes an air inlet 61 and a waste air outlet 62, the waste air outlet 62 is used for discharging the combustion waste gas, and is subjected to waste treatment by a gas treatment device, the preheating device 7 comprises a heat absorbing element 22, a heat conduction connecting piece 71 and a hot end heat radiating piece 72, wherein the heat absorbing element, the heat conduction connecting piece and the hot end heat radiating piece are made of iron materials and are used for heat transfer, the heat absorbing element 22 is disposed in the furnace 60, the hot-end heat sink 72 is disposed in the charging device 1, the heat absorbing element 22 is connected with a hot end heat radiating piece 72 through a heat conduction connecting piece 71, the heat conduction connecting piece outside the feeding device and the combustion furnace is wrapped with heat insulation materials 9, to reduce heat loss, the hot end heat sink 72 preheats soil particles in the feeder 1; the feeding device is characterized in that a plurality of crushing rotary rollers 23 are arranged in the feeding device 1, the crushing rotary rollers 23 are arranged at a horizontal interval, the hot end heat dissipation pieces 72 are of plate-shaped structures, the hot end heat dissipation pieces 72 are respectively arranged between every two crushing rotary rollers 23 in parallel, soil particles turned by the crushing rotary rollers 23 are scattered on the hot end heat dissipation pieces 72, the soil particles are preheated under the heating effect of the hot end heat dissipation pieces 72, meanwhile, water in the soil is evaporated, the soil particles are dried, meanwhile, the soil particles are continuously turned under the rotation of the crushing rotary rollers 23, and the water in the soil particles is fully evaporated.
A comprehensive remediation method for soil polluted by organic matters comprises the following steps:
s1: soil particles to be repaired enter from the feeding device 1 and are crushed by the crushing roller 23 and are subdivided into small crushed soil particles, the soil particles are preheated under the heating action of the hot end heat dissipation piece 72, meanwhile, the moisture in the soil is evaporated, the soil particles are dried, meanwhile, the soil particles are continuously turned under the rotation of the crushing roller 23, and the moisture in the soil particles is fully evaporated;
s2: the crushed and preheated soil particles are primarily screened by a primary screening mechanism, large stones and other impurities are retained on a vibrating screen of the primary screening mechanism and are periodically cleaned, the soil particles passing through the vibrating screen of the primary screening mechanism pass through soil particle crushing channels 15 on two sides of a swinging seat 10, the swinging seat 10 is driven by a bidirectional driving mechanism 12 to horizontally swing, the soil particles in the crushed soil particle crushing channels 15 are impacted, and the dried soil particles after primary screening are further crushed; the soil particles crushed by the swing seat 10 fall on the vibrating screen of the secondary screening mechanism for secondary screening, and meanwhile, the downward displacement speed of the soil particles is slowed down, and the retention time of the soil particles between the two vibrating screens is prolonged;
the vibrating sieves in the primary screening mechanism and the secondary screening mechanism are respectively connected to the swinging seat 10 through connecting cables 14, and through the left-right swinging of the swinging seat 10, the upper vibrating sieve and the lower vibrating sieve frequently vibrate and shake under the pulling action of the connecting cables 14, so that soil particles can pass through the vibrating sieves;
s3: a plurality of groups of photocatalytic assemblies are arranged in the area between the two vibrating sieves, a photocatalytic area is formed between the two vibrating sieves, soil particles falling from the primary screening mechanism are scattered, polluted organic matters in the soil are fully oxidized and decomposed by the photocatalytic assemblies, meanwhile, the soil particles falling from the primary screening mechanism fall on the inclined plane of the upper part of the swinging seat 10, and the displacement path of the soil particles is increased; the soil particles passing through the soil particle crushing channel 15 are further crushed and fall on a vibrating screen in the secondary screening mechanism, and the soil particles crushed again are subjected to photocatalytic treatment by a photocatalytic component again to oxidize polluted organic matters;
s4: soil particles passing through the secondary screening mechanism are displaced to the soil conveying device 3 from the bottom end of the soil crushing shell 11 and are displaced to the heat collecting box body 24, polluted organic matters are thermally desorbed through the thermal desorption device 4, organic volatile gas generated in the thermal desorption process enters the combustion furnace 60 through the gas collecting pipe 5 to be combusted, heat generated in the combustion process heats the heat absorbing element 22, the heat on the heat absorbing element 22 is transferred to a hot end heat dissipation piece 72 in the feeding device through a heat conduction connecting piece 71, and the soil particles are preheated and dried through the hot end heat dissipation piece 72.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. The utility model provides a remediation system is synthesized to soil that organic matter pollutes which characterized in that: including feed arrangement (1), soil preprocessing device (2), soil conveyer (3), thermal desorption device (4), gas combustion apparatus (6) and preheating device (7), the feed inlet of soil preprocessing device (2) and the discharge gate intercommunication of feed arrangement (1), the discharge gate of soil preprocessing device (2) corresponds the setting with the feed inlet of soil conveyer (3), and the soil granule tile is in on soil conveyer (3), be provided with thermal desorption device (4) on soil conveyer (3), the soil granule on thermal desorption device (4) thermal desorption soil conveyer (3), the air inlet and the corresponding setting of thermal desorption device (4) of gas combustion apparatus (6), gas combustion apparatus (6) are collected and are burnt the volatile gas that thermal desorption device (4) thermal desorption goes out, the gas combustion device (6) heats the preheating device (7), the hot end part of the preheating device (7) is arranged in the feeding device (1), and the preheating device (7) preheats dry soil particles;
the soil pretreatment device (2) comprises a soil crushing shell (11) and a crushing and separating mechanism arranged in an inner cavity of the soil crushing shell (11), the soil crushing shell (11) is of a vertically arranged rectangular shell structure with two open ends, the top end of the soil crushing shell (11) is communicated with a discharge hole of the feeding device (1), and the crushing and separating mechanism is correspondingly arranged below the feeding device (1);
the fragmentation mechanism comprises a swinging seat (10), a crushing splint (13) and a bidirectional driving mechanism (12), the top end of the swinging seat (10) is rotatably arranged in a soil crushing shell (11), the rotating shaft of the swinging seat (10) is horizontally arranged, the bottom end of the swinging seat (10) is symmetrically provided with the crushing splint (13) and two crushing splints (13) are respectively arranged at the two sides of the swinging seat (10) in the swinging direction, the crushing splint (13) and the soil crushing shell (11) opposite to the swinging direction are arranged at intervals and form a soil particle crushing channel (15), the crushing splint (13) and the soil crushing shell (11) perpendicular to the swinging direction are arranged at intervals, the crushing splint (13) moves in a reciprocating collision manner relative to the wall body of the soil crushing shell (11), the bidirectional driving mechanism (12) is arranged below the swinging seat (10), the bidirectional driving mechanism is arranged between the two crushing splints (13), and the bidirectional driving mechanism (12) drives the swinging seat (10) to swing;
the soil crushing device is characterized by further comprising a primary screening mechanism and a secondary screening mechanism which are arranged inside the soil crushing shell (11) at an upper and lower interval, wherein the primary screening mechanism and the secondary screening mechanism are respectively arranged on the upper side and the lower side of the crushing mechanism, and the primary screening mechanism and the secondary screening mechanism are identical in structure; the secondary screening mechanism comprises a vibrating screen (16), elastic pieces (17), supporting pieces (18) and connecting cables (14), the vibrating screen (16) is transversely arranged in the soil crushing shell (11), the vibrating screen (16) is connected to the swinging seat (10) through the connecting cables (14), the connecting cables (14) are respectively located on two sides of the swinging seat (10) in the swinging direction, the vibrating screen (16) is provided with the elastic pieces (17), and the elastic pieces (17) are supported and arranged on the inner wall of the soil crushing shell (11) through the supporting pieces (18); the vibrating screen (16) vibrates along with the vibrating base (10) through the vibration;
the gas combustion device (6) comprises a combustion furnace (60), the preheating device (7) comprises a heat-absorbing element (22), a heat-conduction connector (71) and a hot-end heat sink (72), the heat-absorbing element (22) is arranged in the combustion furnace (60), the hot-end heat sink (72) is arranged in the feeding device (1), the heat-absorbing element (22) is connected with the hot-end heat sink (72) through the heat-conduction connector (71), and the hot-end heat sink (72) preheats soil particles in the feeding device (1); a plurality of crushing rotary rollers (23) are arranged in the feeding device (1), the crushing rotary rollers (23) are horizontally arranged at intervals, the hot-end heat dissipation pieces (72) are of plate-shaped structures, the hot-end heat dissipation pieces (72) are respectively arranged between every two crushing rotary rollers (23) in parallel, and soil particles turned over by the crushing rotary rollers (23) are scattered on the hot-end heat dissipation pieces (72);
the swing seat (10) is of a blocky structure with a trapezoidal section, the small end of the swing seat (10) is arranged upwards, the crushing clamp plate (13) is of a plate-shaped structure, the length direction of the crushing clamp plate (13) is arranged along the rotating shaft direction of the swing seat (10), the width direction of the crushing clamp plate (13) is vertically arranged, the bottom end of the crushing clamp plate (13) comprises a crushing part (130), the crushing part (130) is formed by bending the bottom end of the crushing clamp plate (13) towards one side of the bidirectional driving mechanism (12), and the crushing part (130) is in contact with or arranged in a gap with the wall body of a soil crushing shell when the swing seat (10) swings to one side;
the upper and lower both sides of swing seat (10) are provided with a set of photocatalysis subassembly respectively, swing seat (10) are located the photocatalysis region that two sets of photocatalysis subassemblies formed in, photocatalysis subassembly contains photocatalysis oxidizer (8) that a plurality of intervals set up, photocatalysis oxidizer (8) include quartz glass pipe and set up the ultraviolet lamp in quartz glass pipe, quartz glass pipe's inner wall coating has the nanometer titanium dioxide layer, all be provided with photocatalysis structure (19) on the inner wall of broken casing of soil (11), on the outer wall of swing seat (10), photocatalysis structure (19) are aluminium network structure.
2. The comprehensive organic-contaminated soil remediation system of claim 1, wherein: two-way actuating mechanism (12) are including fixing base (123), actuating mechanism (121), drive mechanism (122) and cam drive wheel (120), fixing base (123) are fixed to be set up on broken casing (11) of soil of swing seat (10) below, actuating mechanism (121) set up in fixing base (123) top, cam drive wheel (120) rotate and set up on fixing base (123), just cam drive wheel (120) are connected with actuating mechanism (121) drive through drive mechanism (122), cam drive wheel (120) set up between two broken splint (13), just cam drive wheel (120) can butt and drive broken splint (13) skew under the rotation state.
3. The comprehensive organic-contaminated soil remediation system of claim 2, wherein: the cam driving wheel (120) is an eccentric cam of a complete disc-shaped structure, the rotating shaft (124) of the cam driving wheel is located on a central line of two crushing splints (13) in a free-falling state, the maximum diameter of the cam driving wheel (120) is smaller than the distance between the two crushing splints (13), the maximum eccentric radius of the cam driving wheel (120) is smaller than the distance between the central line of the two crushing splints (13) and the side wall of a soil crushing shell (11), and a crushing part (130) at the bottom end of the crushing splints (13) is arranged at a gap with the soil crushing shell (11) in a limit position state.
4. The comprehensive organic matter-contaminated soil remediation system of claim 1, wherein: the thermal desorption device (4) comprises a heat collection box body (24) and a heating element (21) arranged in the heat collection box body (24), the soil conveying device (3) is a conveyor, the soil conveying device (3) penetrates through the heat collection box body (24), and soil particles paved on the soil conveying device (3) penetrate through the heat collection box body (24) and desorb organic pollutants thermally; the gas collecting box is characterized in that a plurality of gas collecting pipes (5) are arranged on the heat collecting box body (24), one ends of the gas collecting pipes (5) are communicated with the inner cavity of the heat collecting box body (24), and the other ends of the gas collecting pipes are communicated with the gas combustion device (6).
5. A method for remediating an organic matter contaminated soil comprehensive remediation system based on any one of claims 1 to 4, comprising: the method comprises the following steps:
s1: soil particles to be repaired enter from the feeding device (1) and are crushed by the crushing roller (23) and are finely divided into small soil particles, the soil particles are preheated under the heating action of the hot end heat radiating piece (72), meanwhile, the moisture in the soil is evaporated, the soil particles are dried, meanwhile, the soil particles are continuously turned over under the rotation of the crushing roller (23), and the moisture in the soil particles is fully evaporated;
s2: the crushed and preheated soil particles are primarily screened by a primary screening mechanism, impurities are retained on a vibrating screen of the primary screening mechanism and are periodically cleaned, the soil particles passing through the vibrating screen of the primary screening mechanism pass through soil particle crushing channels (15) on two sides of a swinging seat (10), the swinging seat (10) is driven to horizontally swing by a bidirectional driving mechanism (12) and impact the soil particles in the crushed soil particle crushing channels (15), and the primarily screened dry soil particles are further crushed; the soil particles crushed by the swing seat (10) fall on the vibrating screen of the secondary screening mechanism for secondary screening, and meanwhile, the downward displacement speed of the soil particles is slowed down, and the retention time of the soil particles between the two vibrating screens is prolonged;
the vibrating sieves in the primary screening mechanism and the secondary screening mechanism are respectively connected to the swinging seat (10) through connecting cables (14), and through the left-right swinging of the swinging seat (10), the upper vibrating sieve and the lower vibrating sieve frequently vibrate and shake under the pulling action of the connecting cables (14) so that soil particles can pass through the vibrating sieves;
s3: a plurality of groups of photocatalytic assemblies are arranged in the area between the two vibrating sieves, a photocatalytic area is formed between the two vibrating sieves, soil particles falling from the primary screening mechanism are scattered, polluted organic matters in the soil are fully oxidized and decomposed by the photocatalytic assemblies, meanwhile, the soil particles falling from the primary screening mechanism fall on the inclined plane at the upper part of the swinging seat (10), and the displacement path of the soil particles is increased; the soil particles passing through the soil particle crushing channel (15) are further crushed and fall on a vibrating screen in the secondary screening mechanism, and the soil particles which are crushed again are subjected to photocatalytic treatment by the photocatalytic component again to oxidize polluted organic matters;
s4: soil particles passing through the secondary screening mechanism are displaced to the soil conveying device (3) from the bottom end of the soil crushing shell (11) and are displaced to the heat collection box body (24), the polluted organic matters are thermally desorbed through the thermal desorption device (4), organic volatile gas generated in the thermal desorption process enters the combustion furnace (60) through the gas collecting pipe (5) to be combusted, heat generated in the combustion process heats the heat absorption element (22), heat on the heat absorption element (22) is transferred to a hot end heat dissipation piece (72) in the feeding device through the heat conduction connecting piece (71), and the soil particles are preheated and dried through the hot end heat dissipation piece (72).
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| CN111604370A (en) * | 2020-04-27 | 2020-09-01 | 唐山市群志生态科技有限公司 | Circulating type photocatalytic soil remediation device and remediation method thereof |
| CN112691755B (en) * | 2020-12-07 | 2022-04-12 | 生态环境部南京环境科学研究所 | Ectopic thermal desorption treatment method based on thermal desorption auxiliary agent |
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