CN112058892A - Tank type thermal desorption device and desorption method based on thermal desorption auxiliary agent filling - Google Patents
Tank type thermal desorption device and desorption method based on thermal desorption auxiliary agent filling Download PDFInfo
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- CN112058892A CN112058892A CN202010929708.0A CN202010929708A CN112058892A CN 112058892 A CN112058892 A CN 112058892A CN 202010929708 A CN202010929708 A CN 202010929708A CN 112058892 A CN112058892 A CN 112058892A
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- thermal desorption
- auxiliary agent
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- soil
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- 238000003795 desorption Methods 0.000 title claims abstract description 177
- 239000012752 auxiliary agent Substances 0.000 title claims abstract description 82
- 238000011049 filling Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 69
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000007789 gas Substances 0.000 claims abstract description 32
- 238000001179 sorption measurement Methods 0.000 claims abstract description 28
- 239000004343 Calcium peroxide Substances 0.000 claims abstract description 21
- 235000019402 calcium peroxide Nutrition 0.000 claims abstract description 21
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000002957 persistent organic pollutant Substances 0.000 claims description 18
- 210000003813 thumb Anatomy 0.000 claims description 13
- 239000002912 waste gas Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000010457 zeolite Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000002808 molecular sieve Substances 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000012855 volatile organic compound Substances 0.000 description 5
- 239000010815 organic waste Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 238000005453 pelletization Methods 0.000 description 3
- -1 polychlorinated biphenyl PCBs Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 2
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/42—Driving mechanisms; Roller speed control
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a tank type thermal desorption device based on thermal desorption additive filling and a desorption method thereof, wherein the device comprises a support frame, a thermal desorption unit, a drive control unit and a tail gas processing unit, wherein the thermal desorption unit, the drive control unit and the tail gas processing unit are positioned above the support frame; the tail gas treatment unit comprises an adsorption box body filled with adsorption filler. According to the invention, the alumina balls containing the hydrogen peroxide solution are adopted as the low-temperature thermal desorption auxiliary agent, the calcium peroxide is adopted as the high-temperature thermal desorption auxiliary agent, the soil is fully distributed in the two shifting pieces filled with the thermal desorption auxiliary agent by virtue of the centrifugal rotation of the rotating shifting wheel, the oxygen decomposed by heating can be uniformly dispersed into the soil, and the thermal desorption efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of polluted soil treatment, and particularly belongs to a tank type thermal desorption device and a desorption method based on thermal desorption auxiliary agent filling.
Background
The soil thermal desorption is one of the methods for removing pollutants in the organic polluted soil, the organic polluted soil is heated to be close to or exceed the boiling point of the organic matters in a heating mode, so that the organic pollutants are volatilized and separated from the soil, and then the desorbed waste gas is treated to achieve the aim of remediation. The thermal desorption method can effectively remove volatile and semi-volatile organic pollutants in soil, such as: volatile Organic Compounds (VOCs), Polycyclic Aromatic Hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and the like.
The utility model discloses a chinese utility model patent of publication No. CN203578349U discloses an environmental protection and energy saving's organic contaminated soil thermal desorption repair processing system, including charge-in system, thermal desorption system, soil discharging system, burning and tail gas processing system, flue gas temperature control system, tail gas cooling dust pelletizing system and exhaust emission system, charge-in system accesss to thermal desorption system, thermal desorption system accesss to soil discharging system respectively with burning and tail gas processing system, burning and tail gas processing system lead to flue gas temperature control system, flue gas temperature control system accesss to thermal desorption system, thermal desorption system accesss to tail gas cooling dust pelletizing system, tail gas cooling dust pelletizing system accesss to exhaust emission system. Most thermal desorption devices are heated to volatilize organic pollutants into waste gas and then treat the waste gas, so that the load of tail gas treatment can be increased, and partial organic matters still remain in soil, so that the removal rate of the organic pollutants is reduced.
Disclosure of Invention
Aiming at the technical problem of heavy load of tail gas treatment, the invention provides a tank type thermal desorption device and a desorption method based on thermal desorption auxiliary agent filling.
The technical scheme of the invention is as follows: a tank type thermal desorption device based on thermal desorption auxiliary agent filling is characterized by comprising a support frame, a thermal desorption unit, a drive control unit and a tail gas treatment unit, wherein the thermal desorption unit, the drive control unit and the tail gas treatment unit are positioned above the support frame;
the thermal desorption unit comprises a thermal desorption tank connected above the support frame through a support leg, an electric heating sleeve used for providing a heat source for the interior of the thermal desorption tank is arranged outside the thermal desorption tank, a feed port is arranged at the top of the thermal desorption tank, a soil pretreatment mechanism is connected above the feed port, a rotating shaft is arranged at the central position of the bottom of the thermal desorption tank, a rotating dial wheel filled with a thermal desorption auxiliary agent is detachably connected to the upper end of the rotating shaft and used for driving the soil to rotate and thermally desorb the soil, a discharge pipe with a valve is arranged at the bottom of the thermal desorption tank, and the lower end of the discharge pipe penetrates through;
the driving control unit comprises a main box body, an electric box and a motor, wherein the main box body is arranged above the supporting frame and positioned on one side of the thermal desorption tank;
the tail gas processing unit is equipped with the adsorption filler including the adsorption box that is located the main tank body top in the adsorption box, and adsorption box one end is passed through breather pipe and thermal desorption jar upper portion through connection for introduce the adsorption filler with the inside waste gas that produces of thermal desorption jar and handle, the adsorption box other end is equipped with the exhaust fan that is used for the drainage of bleeding.
Further, soil pretreatment mechanism is connected with the hopper that is used for the feeding including fixing the rotation axis at the adsorption tank body top on the rotation axis, installs and hopper inside is used for carrying out broken extrusion processing's crushing roller to soil, and the crushing roller drives rotatoryly by installing the driving motor in the hopper outside respectively, and the hopper bottom is equipped with the rotatory apron that is used for carrying out the closing cap to the feed inlet, and rotatory apron passes through the hasp and is connected with thermal desorption jar locking. Make the hopper can 180 degrees rotary motion through the rotation axis, be convenient for to the thermal desorption auxiliary agent in the thumb wheel of rotating regenerate to also be convenient for clear up inside the thermal desorption jar.
Furthermore, a sealing rubber ring for preventing the tail gas from escaping is arranged between the rotary cover plate and the feed inlet, and a rubber cover plate is arranged at the top of the hopper. The tail gas escape during thermal desorption can be effectively prevented through the sealing rubber ring and the rubber cover plate.
Furthermore, the rotary shifting wheel comprises an upper fixing ring, a lower fixing ring and a shifting piece, the upper fixing ring comprises an upper outer ring, a plurality of balls for rolling connection with the inner wall of the thermal desorption tank are arranged on the periphery of the upper outer ring, and the inner side of the upper outer ring is fixedly connected with an upper inner ring located in the center of the upper outer ring through 4-6 first connecting rods; the lower fixing ring comprises a lower outer ring, a plurality of balls used for being in rolling connection with the inner wall of the thermal desorption tank are arranged on the periphery of the lower outer ring, the inner side of the lower outer ring is connected with a fixed circular plate located at the center of the lower outer ring through 4-6 second connecting rods, a bolt hole in threaded connection with a rotating shaft is formed in the fixed circular plate, a locking nut used for pressing the fixed circular plate is arranged at the upper end of the rotating shaft, the shifting pieces are connected between the first connecting rod and the second connecting rod which are opposite up and down, and the two adjacent shifting pieces are spaced at equal intervals. The upper outer ring and the lower outer ring are connected with the inner wall of the thermal desorption tank in a rolling manner through the balls, so that the stability of the rotating shifting wheel during high-speed rotation can be improved, and the contaminated soil can be uniformly dispersed between the two adjacent shifting pieces.
Furthermore, the plectrum includes the rectangular channel of welding between head rod and second connecting rod, and the long limit both sides and the base one side of the notch of rectangular channel are equipped with the preforming that is used for the joint apron, and the cavity that apron and rectangular channel constitute is used for filling thermal desorption auxiliary agent, and the asbestos gauge sheet that is used for heat conduction and separation thermal desorption auxiliary agent to reveal has been laid to the rectangular channel inboard and joint apron inboard, and the rectangular channel is close to thermal desorption jar inner wall one side and is equipped with the scraper blade. Loading the thermal desorption agent through the rectangular groove not only can make the oxygen that the thermal desorption agent was heated and produced fully contact with soil to also be convenient for change the thermal desorption agent. The scraper can be used for scraping off the soil adhered to the inner wall of the thermal desorption tank, so that the soil is prevented from coking due to heated adhesion.
Furthermore, the thermal desorption auxiliary agent comprises an A type auxiliary agent and a B type auxiliary agent, the A type auxiliary agent is calcium peroxide particles, the B type auxiliary agent is alumina balls absorbed with hydrogen peroxide solution, and the A type auxiliary agent and the B type auxiliary agent are respectively and independently filled in the rectangular grooves. The hydrogen peroxide solution adsorbed by the alumina balls can be stably solidified, the hydrogen peroxide can be stably released by heat, organic pollutants in the soil can be subjected to thermal desorption and oxidation at a low temperature, and the calcium peroxide can be decomposed at a high temperature to generate oxygen to perform high-temperature thermal desorption and oxidation on the organic pollutants in the soil.
Furthermore, the weight ratio of the A type auxiliary agent to the B type auxiliary agent is 3-5:1, the volume concentration of the hydrogen peroxide solution in the B type auxiliary agent is 30%, and the mixing ratio of the hydrogen peroxide solution and the alumina balls is 1000-1500 g/L.
Further, transmission assembly is including connecting the L type communicating pipe between thermal desorption tank bottoms portion and main tank bottom portion, is located the vertical end of L type communicating pipe and connects at the axis of rotation lower extreme from the driving wheel, connects the action wheel at motor output shaft lower extreme to and be located the horizontal section of L type communicating pipe and connect the belt between from driving wheel and action wheel.
Further, the adsorption filler is prepared from activated carbon and a zeolite molecular sieve according to a mass ratio of 2: 3, and (3). The activated carbon and zeolite molecules can adsorb unoxidized organic waste gas to prevent the organic waste gas from escaping to pollute the environment.
The invention also provides a desorption method of the tank-type thermal desorption device based on thermal desorption auxiliary agent filling, which comprises the following steps:
the method comprises the following steps: respectively filling thermal desorption aids into the rotary thumb wheel, wherein the thermal desorption aids comprise an A-type aid and a B-type aid, the A-type aid is calcium peroxide particles, and the B-type aid is alumina balls adsorbed with hydrogen peroxide solution;
step two: loading soil to be polluted into the thermal desorption tank, driving a motor to drive a rotating dial wheel to rotate through the motor to enable the soil to be uniformly distributed, then starting an electric heating sleeve to heat to 70-100 ℃, and carrying out low-temperature oxidative decomposition on organic pollutants in the soil by oxygen which is gradually heated and decomposed by hydrogen peroxide in the B-type auxiliary agent for 20-50 min; then raising the temperature to 350-600 ℃, and continuously generating oxygen to carry out high-temperature oxidative decomposition on the organic pollutants in the soil by the thermal decomposition of the calcium peroxide of the A-type auxiliary agent for 20-30 min; the polluted waste gas generated by heating the organic pollutants is discharged after being treated by a tail gas treatment unit; after the thermal desorption treatment is finished, continuously rotating the rotary thumb wheel to radiate heat of the soil until no waste gas is discharged after cooling, opening a valve on the discharge pipe, and pushing the thermal desorption soil to discharge from the discharge pipe by the rotary thumb wheel;
step three: leaching the used A type auxiliary agent and B type auxiliary agent by using a hydrogen peroxide solution with the volume concentration of 30%, so that the aluminum oxide balls in the B type auxiliary agent adsorb the hydrogen peroxide solution again, and the calcium oxide produced by the thermal decomposition of the calcium peroxide in the A type auxiliary agent reacts with the hydrogen peroxide to regenerate the calcium peroxide, wherein the reaction formula is CaO + H2O2＝CaO2+H2O; the thermal desorption agent can be repeatedly used, and the thermal desorption treatment can be carried out on the polluted soil by repeating the steps.
The invention has the beneficial effects that: the invention adopts the alumina ball containing the solution absorbed with the hydrogen peroxide as the low-temperature thermal desorption auxiliary agent and the calcium peroxide as the high-temperature thermal desorption auxiliary agent, can decompose the hydrogen peroxide to generate oxygen to permeate into the soil when the soil is heated to a low temperature of between 70 and 100 ℃, and can carry out pre-oxidation treatment on the organic matter due to the lower temperature and correspondingly lower volatilization rate of the organic matter; and then raising the temperature to 350-600 ℃, decomposing calcium peroxide at high temperature to generate oxygen, and carrying out secondary oxidation treatment on the pretreated organic pollutant soil waste gas. The two thermal desorption auxiliary agents are filled in the rotating shifting wheel, soil is fully distributed in the two shifting pieces filled with the thermal desorption auxiliary agents by virtue of centrifugal rotation of the rotating shifting wheel, oxygen decomposed by heating can be uniformly dispersed into the soil, and the thermal desorption efficiency is improved. In addition, the thermal desorption auxiliary agent can be regenerated in situ by supplementing a hydrogen peroxide solution, and the thermal desorption effect is obvious. In a word, the invention has the advantages of simple structure, convenient use, high thermal desorption efficiency and the like.
Drawings
FIG. 1 is a schematic view of the overall mechanism of the present invention;
FIG. 2 is a schematic view of the external structure of the present invention;
FIG. 3 is a longitudinal sectional view of the rotary thumb wheel of the present invention;
FIG. 4 is a top view of the wheel of the present invention;
FIG. 5 is a bottom view of the rotary thumb wheel of the present invention;
fig. 6 is a schematic perspective view of a rectangular groove according to the present invention.
Wherein, 1-support frame, 2-thermal desorption unit, 21-support foot, 22-thermal desorption tank, 23-electric heating jacket, 24-feed inlet, 25-soil pretreatment mechanism, 251-rotating shaft, 252-hopper, 253-crushing roller, 254-driving motor, 255-rotating cover plate, 256-lock catch, 257-sealing rubber ring, 258-rubber cover plate, 26-rotating shaft, 27-rotating dial wheel, 271-upper fixing ring, 272-lower fixing ring, 273-dial plate, 274-upper outer ring, 275-upper inner ring, 276-lower outer ring, 277-ball, 278-first connecting rod, 279-second connecting rod, 2710-fixing round plate, 2711-bolt hole, 2712-lock nut, 2713-rectangular groove, 2714-clamping cover plate, 2715-pressing piece, 2716-scraping plate, 28-discharging pipe, 29-valve, 3-driving control unit, 31-main box body, 32-electric box, 33-motor, 34-transmission component, 341-L type communicating pipe, 342-driven wheel, 343-driving wheel, 344-belt, 4-tail gas processing unit, 41-adsorption box body, 42-vent pipe and 43-exhaust fan.
Detailed Description
Example 1
As shown in fig. 1, a tank-type thermal desorption device based on thermal desorption additive filling is characterized by comprising a support frame 1, and a thermal desorption unit 2, a drive control unit 3 and a tail gas treatment unit 4 which are positioned above the support frame 1; thermal desorption unit 2 includes the thermal desorption jar 22 of connecting in support frame 1 top through supporting legs 21, thermal desorption jar 22 outside is equipped with and is used for providing the electric heating jacket 23 of heat source for thermal desorption jar 22 inside, thermal desorption jar 22's top is equipped with feed inlet 24, feed inlet 24's top is connected with soil pretreatment mechanism 25, thermal desorption jar 22 bottom central point puts and is equipped with axis of rotation 26, the upper end of axis of rotation 26 can be dismantled and be connected with inside rotation thumb wheel 27 that has the thermal desorption auxiliary agent, be used for driving soil rotation and carry out thermal desorption to soil, thermal desorption jar 22 bottom is equipped with the discharging pipe 28 that has valve 29, the 28 lower extreme of discharging pipe runs through support frame 1. As shown in fig. 1 and 2, the soil pretreatment mechanism 25 includes a rotating shaft 251 fixed on the top of the adsorption tank 41, a hopper 252 for feeding is connected to the rotating shaft 251, a crushing roller 253 for crushing and squeezing the soil is installed inside the hopper 252, the crushing roller 253 is driven by a driving motor 254 installed outside the hopper 252 to rotate, a rotary cover plate 255 for sealing the feeding port 24 is provided at the bottom of the hopper 252, and the rotary cover plate 255 is locked and connected with the thermal desorption tank 22 through a lock 256. The hopper 252 can rotate 180 degrees by the rotating shaft 251, so that the thermal desorption auxiliary agent in the rotating dial wheel 27 can be regenerated conveniently, and the interior of the thermal desorption tank 22 can be cleaned conveniently. A sealing rubber ring 257 for preventing the tail gas from escaping is arranged between the rotary cover plate 255 and the feed inlet 24, and a rubber cover plate 258 is arranged at the top of the hopper 252. The tail gas escape during thermal desorption can be effectively prevented through the sealing rubber ring 257 and the rubber cover plate 258.
As shown in fig. 3, the rotary dial wheel 27 includes an upper fixed ring 271, a lower fixed ring 272 and a dial 273, the upper fixed ring 271 includes an upper outer ring 274, the outer periphery of the upper outer ring 274 is provided with a plurality of balls 277 for rolling connection with the inner wall of the thermal desorption tank 22, the inner side of the upper outer ring 274 is fixedly connected with an upper inner ring 275 located at the center of the upper outer ring 274 through 4-6 first connecting rods 278; the lower fixing ring 272 comprises a lower outer ring 276, a plurality of balls 277 for rolling connection with the inner wall of the thermal desorption tank 22 are arranged on the periphery of the lower outer ring 276, the inner side of the lower outer ring 276 is connected with a fixed circular plate 2710 positioned at the central position of the lower outer ring 276 through 4-6 second connecting rods 279, a bolt hole 2711 in threaded connection with the rotating shaft 26 is arranged on the fixed circular plate 2710, a lock nut 2712 for pressing the fixed circular plate 2710 is arranged at the upper end of the rotating shaft 26, the poking pieces 273 are connected between a first connecting rod 278 and a second connecting rod 279 which are opposite up and down, and two adjacent poking pieces 273 are spaced at equal intervals. The upper outer ring 274 and the lower outer ring 276 are connected with the inner wall of the thermal desorption tank 22 in a rolling manner through the balls 277, so that the stability of the rotating thumb wheel 27 in high-speed rotation can be improved, and the contaminated soil can be uniformly dispersed between the two adjacent thumb pieces 273.
As shown in fig. 4 and 5, the poking piece 273 includes a rectangular groove 2713 welded between the first connecting rod 278 and the second connecting rod 279, pressing pieces 2715 for clamping the cover plate 2714 are arranged on two sides of the long side and one side of the bottom side of the notch of the rectangular groove 2713, a cavity formed by the cover plate and the rectangular groove 2713 is used for filling thermal desorption auxiliary agents, asbestos meshes 2716 for heat conduction and blocking leakage of the thermal desorption auxiliary agents are laid on the inner side of the rectangular groove 2713 and the inner side of the clamping cover plate 2714, and a scraping plate 2716 is arranged on one side of the rectangular groove 2713 close to the inner wall of the thermal desorption tank 22. Loading the thermal desorbent through the rectangular groove 2713 not only can make the oxygen energy generated by heating the thermal desorbent fully contact with soil, but also is convenient for replacing the thermal desorbent. Soil adhered to the inner wall of the thermal desorption tank 22 can be scraped off by the scraper 2716, and coking caused by heated adhesion is prevented. The thermal desorption auxiliary agent comprises an A-type auxiliary agent and a B-type auxiliary agent, the A-type auxiliary agent is calcium peroxide particles, the B-type auxiliary agent is alumina balls adsorbed with hydrogen peroxide solution, and the A-type auxiliary agent and the B-type auxiliary agent are respectively and independently filled in the rectangular groove 2713. The hydrogen peroxide solution adsorbed by the alumina balls can be stably solidified, the hydrogen peroxide can be stably released by heat, organic pollutants in the soil can be subjected to thermal desorption and oxidation at a low temperature, and the calcium peroxide can be decomposed at a high temperature to generate oxygen to perform high-temperature thermal desorption and oxidation on the organic pollutants in the soil. The weight ratio of the A-type auxiliary agent to the B-type auxiliary agent is 4:1, the volume concentration of the hydrogen peroxide solution in the B-type auxiliary agent is 30%, and the mixing ratio of the hydrogen peroxide solution to the alumina balls is 1200 g/L.
As shown in fig. 1, the driving control unit 3 includes a main box 31 installed above the supporting frame 1 and located at one side of the thermal desorption tank 22, an electric box 32 located at the upper part of the main box 31, and a motor 33 located at the bottom of the main box 31, wherein the motor 33 is in transmission connection with the rotating shaft 26 through a transmission assembly 34, and is used for driving the rotating thumb wheel 27 to drive soil to conduct heat with the inner wall of the thermal desorption tank 22 under the action of centrifugal force; as shown in fig. 1 and 2, the transmission assembly 34 includes an L-shaped communication pipe 341 connected between the bottom of the thermal desorption tank 22 and the bottom of the main tank 31, a driven wheel 342 located at a vertical end of the L-shaped communication pipe 341 and connected to a lower end of the rotation shaft 26, a driving wheel 343 connected to a lower end of an output shaft of the motor 33, and a belt 344 located in a lateral section of the L-shaped communication pipe 341 and connected between the driven wheel 342 and the driving wheel 343.
As shown in fig. 1, the tail gas treatment unit 4 includes an adsorption tank 41 located at the top of the main tank 31, an adsorption filler is disposed in the adsorption tank 41, one end of the adsorption tank 41 is connected with the upper portion of the thermal desorption tank 22 through a vent pipe 42 for introducing the waste gas generated inside the thermal desorption tank 22 into the adsorption filler for treatment, and an exhaust fan 43 for air exhaust and drainage is disposed at the other end of the adsorption tank 41. Wherein the adsorption filler is prepared from activated carbon and zeolite molecular sieve according to a mass ratio of 2: 3, and (3). The activated carbon and zeolite molecules can adsorb unoxidized organic waste gas to prevent the organic waste gas from escaping to pollute the environment.
The method for carrying out thermal desorption on soil by using the device of the embodiment comprises the following steps:
the method comprises the following steps: the clamping cover plate 2714 is opened, the different rectangular grooves 2713 are respectively filled with calcium peroxide particles of type A aids and aluminum oxide balls of type B aids with hydrogen peroxide solution, and the rectangular grooves 2713 filled with the type A aids and the type B aids are distributed at intervals. And the weight ratio of the filling amount of the A-type auxiliary agent to the filling amount of the B-type auxiliary agent is 4:1, the clamping cover plate 2714 is closed after the installation is finished, and the rotary cover plate 255 rotates 180 degrees around the rotating shaft 251 and is far away from the thermal desorption tank 22 as shown in FIG. 2. And the rotating dial wheel 27 is put into the thermal desorption tank 22 from the feeding port 24, and the bolt hole 2711 at the bottom of the rotating dial wheel is sleeved on the rotating shaft 26 and fixed by the locking nut 2712. The rotary cover 255 is rotated back over the feed port 24 and secured with a latch 256.
Step two: the rubber cover plate 258 is opened, soil to be polluted is filled into the thermal desorption tank 22 from the upper direction of the hopper 252, the soil is extruded and crushed by the two crushing rollers 253 which rotate relatively and then falls into the rotating shifting wheel 27, the motor 33 is started to rapidly rotate the rotating shifting wheel 27 connected to the rotating shaft 26 by belt transmission, and the soil is uniformly dispersed between the two adjacent shifting pieces 273 by virtue of centrifugal force. Then, starting the electric heating sleeve 23 to heat to 100 ℃, and carrying out low-temperature oxidative decomposition on the organic pollutants in the soil by the oxygen which is gradually heated and decomposed by the hydrogen peroxide in the B-type auxiliary agent for 30 min; then, the temperature is increased to 550 ℃, the calcium peroxide of the A-type auxiliary agent is heated and decomposed to continuously generate oxygen to carry out high-temperature oxidative decomposition on the organic pollutants in the soil, and the time is 25 min; the polluted waste gas generated by heating the organic pollutants is discharged after being treated by the tail gas treatment unit 4; after the thermal desorption treatment is finished, the soil is continuously rotated by the rotating dial wheel 27 to dissipate heat until no waste gas is discharged after cooling, the valve 29 on the discharge pipe 28 is opened, and the thermal desorption soil is pushed by the rotating dial wheel 27 to be discharged from the discharge pipe 28;
step three: leaching the used A type auxiliary agent and B type auxiliary agent by using a hydrogen peroxide solution with the volume concentration of 30%, so that the aluminum oxide balls in the B type auxiliary agent adsorb the hydrogen peroxide solution again, and the calcium oxide produced by the thermal decomposition of the calcium peroxide in the A type auxiliary agent reacts with the hydrogen peroxide to regenerate the calcium peroxide, wherein the reaction formula is CaO + H2O2＝CaO2+H2O; the thermal desorption agent can be repeatedly used, and the thermal desorption treatment can be carried out on the polluted soil by repeating the steps.
The removal rate of VOCs benzene after thermal desorption is 99.9%, the removal rate of chlorine-containing organic compounds CVOCs is 99.5%, the removal rate of polycyclic aromatic hydrocarbons PAHs is 99.3%, and the removal rate of polychlorinated biphenyl PCBs is 99.0%.
Example 2
This example is essentially the same as example 1 except that the thermal desorption aid only is the type a aid which is calcium peroxide particles.
The removal rate of VOCs benzene after thermal desorption is 81.2%, the removal rate of chlorine-containing organic compounds CVOCs is 79.1%, the removal rate of polycyclic aromatic hydrocarbons PAHs is 76.8%, and the removal rate of polychlorinated biphenyl PCBs is 77.4%.
Example 3
This example is substantially the same as example 1 except that the thermal desorption aid is only alumina spheres with hydrogen peroxide solution adsorbed on the type B aid.
The removal rate of VOCs benzene after thermal desorption is 90.1%, the removal rate of chlorine-containing organic compounds CVOCs is 91.4%, the removal rate of polycyclic aromatic hydrocarbons PAHs is 89.7%, and the removal rate of polychlorinated biphenyl PCBs is 88.5%.
Claims (10)
1. The pot-type thermal desorption device based on thermal desorption auxiliary agent filling is characterized by comprising a support frame (1), a thermal desorption unit (2), a drive control unit (3) and a tail gas treatment unit (4), wherein the thermal desorption unit (2), the drive control unit and the tail gas treatment unit are positioned above the support frame (1);
the thermal desorption unit (2) comprises a thermal desorption tank (22) connected above the support frame (1) through support legs (21), an electric heating sleeve (23) used for providing a heat source inside the thermal desorption tank (22) is arranged outside the thermal desorption tank (22), a feed inlet (24) is formed in the top of the thermal desorption tank (22), a soil pretreatment mechanism (25) is connected above the feed inlet (24), a rotating shaft (26) is arranged at the center of the bottom of the thermal desorption tank (22), the upper end of the rotating shaft (26) is detachably connected with a rotating shifting wheel (27) filled with thermal desorption auxiliary agents, the rotating wheel is used for driving soil to rotate and thermally desorb the soil, a discharge pipe (28) with a valve (29) is arranged at the bottom of the thermal desorption tank (22), and the lower end of the discharge pipe (28) penetrates through the support frame (1);
the driving control unit (3) comprises a main box body (31) which is arranged above the support frame (1) and is positioned on one side of the thermal desorption tank (22), an electric box (32) which is positioned on the upper part of the main box body (31), and a motor (33) which is positioned at the bottom of the main box body (31), wherein the motor (33) is in transmission connection with the rotating shaft (26) through a transmission assembly (34) and is used for driving the rotating dial wheel (27) to drive soil to conduct heat with the inner wall of the thermal desorption tank (22) under the action of centrifugal force;
tail gas processing unit (4) is including being located the adsorption box (41) at main tank body (31) top, be equipped with the adsorption filler in adsorption box (41), adsorption box (41) one end is passed through breather pipe (42) and thermal desorption jar (22) upper portion through connection for introduce the adsorption filler with the inside waste gas that produces of thermal desorption jar (22) and handle, adsorption box (41) other end is equipped with exhaust fan (43) that are used for bleeding the drainage.
2. The thermal desorption device based on the thermal desorption auxiliary agent filling tank type as claimed in claim 1, wherein the soil pretreatment mechanism (25) comprises a rotating shaft (251) fixed on the top of the adsorption tank body (41), the rotating shaft (251) is connected with a hopper (252) for feeding, crushing rollers (253) for crushing and extruding the soil are installed inside the hopper (252), the crushing rollers (253) are respectively driven to rotate by a driving motor (254) installed outside the hopper (252), the bottom of the hopper (252) is provided with a rotating cover plate (255) for sealing the feeding hole (24), and the rotating cover plate (255) is in locking connection with the thermal desorption tank (22) through a lock catch (256).
3. The thermal desorption device based on the thermal desorption auxiliary agent filling tank type as claimed in claim 1, wherein a sealing rubber ring (257) for preventing the tail gas from escaping is arranged between the rotary cover plate (255) and the feed port (24), and a rubber cover plate (258) is arranged at the top of the hopper (252).
4. The thermal desorption device based on the thermal desorption auxiliary agent filling tank type as claimed in claim 1, wherein the rotating thumb wheel (27) comprises an upper fixed ring (271), a lower fixed ring (272) and a thumb piece (273), the upper fixed ring (271) comprises an upper outer ring (274), the periphery of the upper outer ring (274) is provided with a plurality of balls (277) for rolling connection with the inner wall of the thermal desorption tank (22), and the inner side of the upper outer ring (274) is fixedly connected with an upper inner ring (275) located at the center of the upper outer ring (274) through 4-6 first connecting rods (278); the lower fixing ring (272) comprises a lower outer ring (276), a plurality of balls (277) which are used for being in rolling connection with the inner wall of the thermal desorption tank (22) are arranged on the periphery of the lower outer ring (276), the inner side of the lower outer ring (276) is connected with a fixed circular plate (2710) located at the center of the lower outer ring (276) through 4-6 second connecting rods (279), a bolt hole (2711) which is in threaded connection with the rotating shaft (26) is formed in the fixed circular plate (2710), a locking nut (2712) which is used for pressing the fixed circular plate (2710) is arranged at the upper end of the rotating shaft (26), the shifting pieces (273) are connected between the first connecting rod (278) and the second connecting rod (279) which are opposite up and down, and the two adjacent shifting pieces (273) are spaced at equal intervals.
5. The tank type thermal desorption device based on thermal desorption auxiliary agent filling according to claim 4, wherein the poking piece (273) comprises a rectangular groove (2713) welded between the first connecting rod (278) and the second connecting rod (279), pressing pieces (2715) for clamping the cover plate (2714) are arranged on two sides of the long edge and one side of the bottom edge of the notch of the rectangular groove (2713), a cavity formed by the cover plate and the rectangular groove (2713) is used for filling the thermal desorption auxiliary agent, asbestos meshes (2716) for conducting heat and blocking leakage of the thermal desorption auxiliary agent are paved on the inner side of the rectangular groove (2713) and the inner side of the clamping cover plate (2714), and a scraping plate (2716) is arranged on one side of the rectangular groove (2713) close to the inner wall of the thermal desorption tank (22).
6. The tank type thermal desorption device based on thermal desorption auxiliary agent filling of claim 5, wherein the thermal desorption auxiliary agent comprises an A type auxiliary agent and a B type auxiliary agent, the A type auxiliary agent is calcium peroxide particles, the B type auxiliary agent is alumina balls adsorbed with hydrogen peroxide solution, and the A type auxiliary agent and the B type auxiliary agent are respectively and independently filled in the rectangular groove (2713).
7. The thermal desorption apparatus of the tank type based on thermal desorption auxiliary agent filling as claimed in claim 1, wherein the transmission assembly (34) comprises an L-shaped communicating pipe (341) connected between the bottom of the thermal desorption tank (22) and the bottom of the main tank body (31), a driven wheel (342) located at the vertical end of the L-shaped communicating pipe (341) and connected to the lower end of the rotating shaft (26), a driving wheel (343) connected to the lower end of the output shaft of the motor (33), and a belt (344) located in the transverse section of the L-shaped communicating pipe (341) and connected between the driven wheel (342) and the driving wheel (343).
8. The tank type thermal desorption device based on thermal desorption auxiliary agent filling of claim 1, wherein the adsorption filler is prepared from activated carbon and zeolite molecular sieve according to a mass ratio of 2: 3, and (3).
9. The tank type thermal desorption device based on thermal desorption auxiliary agent filling of claim 1, wherein the adsorption filler is prepared from zeolite molecular sieve and activated carbon according to the mass ratio of 3: 2.
10. The thermal desorption device based on thermal desorption auxiliary agent filling tank type according to claim 1, wherein the desorption method using the device comprises the following steps:
the method comprises the following steps: thermal desorption aids are respectively filled in the rotating thumb wheel (27), wherein the thermal desorption aids comprise an A-type aid and a B-type aid, the A-type aid is calcium peroxide particles, and the B-type aid is alumina balls adsorbed with hydrogen peroxide solution;
step two: soil to be polluted is filled in the thermal desorption tank (22), the motor (33) is driven by the motor (33) to drive the rotating dial wheel (27) to rotate so as to enable the soil to be uniformly distributed, then the electric heating sleeve (23) is started to heat to 70-100 ℃, oxygen which is gradually heated and decomposed by hydrogen peroxide in the B-type auxiliary agent is used for carrying out low-temperature oxidative decomposition on organic pollutants in the soil, and the time is 20-50 min; then raising the temperature to 350-600 ℃, and continuously generating oxygen to carry out high-temperature oxidative decomposition on the organic pollutants in the soil by the thermal decomposition of the calcium peroxide of the A-type auxiliary agent for 20-30 min; the polluted waste gas generated by heating the organic pollutants is discharged after being treated by the tail gas treatment unit (4); after the thermal desorption treatment is finished, the soil is continuously rotated by the rotating dial wheel (27) to dissipate heat until no waste gas is discharged after cooling, a valve (29) on the discharge pipe (28) is opened, and the thermal desorption soil is pushed by the rotating dial wheel (27) to be discharged from the discharge pipe (28);
step three: leaching the used A type auxiliary agent and B type auxiliary agent by using a hydrogen peroxide solution with the volume concentration of 30%, so that the aluminum oxide balls in the B type auxiliary agent adsorb the hydrogen peroxide solution again, and the calcium oxide produced by the thermal decomposition of the calcium peroxide in the A type auxiliary agent reacts with the hydrogen peroxide to regenerate the calcium peroxide; the thermal desorption agent can be repeatedly used, and the thermal desorption treatment can be carried out on the polluted soil by repeating the steps.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000579A (en) * | 2021-01-29 | 2021-06-22 | 生态环境部南京环境科学研究所 | Device and method for ex-situ remediation of POPs pesticide contaminated soil |
| CN113695373A (en) * | 2021-09-14 | 2021-11-26 | 中煤长江生态环境科技有限公司 | Thermal desorption device for organic contaminated soil |
| CN113769538A (en) * | 2021-09-14 | 2021-12-10 | 华茂环保科技(江阴)有限公司 | Refrigeration equipment for processing high-temperature waste heat of vOCs (volatile organic compounds) and use method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043551A1 (en) * | 1980-07-07 | 1982-01-13 | Peroxid-Chemie GmbH | Process for producing peroxides of bivalent metals |
| CN104812706A (en) * | 2012-09-07 | 2015-07-29 | 可林恩化学公司 | Systems and methods for generation of reactive oxygen species and applications thereof |
| CN207547254U (en) * | 2017-10-10 | 2018-06-29 | 山东省环科院环境工程有限公司 | A kind of organic polluted soil thermal desorption heating unit |
| CN209174584U (en) * | 2018-11-20 | 2019-07-30 | 谢成明 | A kind of soil ecology prosthetic device |
| CN209792250U (en) * | 2019-01-04 | 2019-12-17 | 北京坤达胜源环境科技有限公司 | Thermal desorption repair system for organic matter contaminated soil |
| CN110665951A (en) * | 2019-09-18 | 2020-01-10 | 东华工程科技股份有限公司 | Thermal desorption device for organic contaminated soil |
-
2020
- 2020-09-07 CN CN202010929708.0A patent/CN112058892B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043551A1 (en) * | 1980-07-07 | 1982-01-13 | Peroxid-Chemie GmbH | Process for producing peroxides of bivalent metals |
| CN104812706A (en) * | 2012-09-07 | 2015-07-29 | 可林恩化学公司 | Systems and methods for generation of reactive oxygen species and applications thereof |
| CN207547254U (en) * | 2017-10-10 | 2018-06-29 | 山东省环科院环境工程有限公司 | A kind of organic polluted soil thermal desorption heating unit |
| CN209174584U (en) * | 2018-11-20 | 2019-07-30 | 谢成明 | A kind of soil ecology prosthetic device |
| CN209792250U (en) * | 2019-01-04 | 2019-12-17 | 北京坤达胜源环境科技有限公司 | Thermal desorption repair system for organic matter contaminated soil |
| CN110665951A (en) * | 2019-09-18 | 2020-01-10 | 东华工程科技股份有限公司 | Thermal desorption device for organic contaminated soil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000579A (en) * | 2021-01-29 | 2021-06-22 | 生态环境部南京环境科学研究所 | Device and method for ex-situ remediation of POPs pesticide contaminated soil |
| CN113695373A (en) * | 2021-09-14 | 2021-11-26 | 中煤长江生态环境科技有限公司 | Thermal desorption device for organic contaminated soil |
| CN113769538A (en) * | 2021-09-14 | 2021-12-10 | 华茂环保科技(江阴)有限公司 | Refrigeration equipment for processing high-temperature waste heat of vOCs (volatile organic compounds) and use method thereof |
| CN113769538B (en) * | 2021-09-14 | 2024-04-02 | 华茂环保科技(江阴)有限公司 | Refrigeration equipment for VOCs high-temperature waste heat treatment and use method thereof |
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