CN109622587A - External heat rotary type organic contaminated soil thermal desorption device with inner tube bundle - Google Patents
External heat rotary type organic contaminated soil thermal desorption device with inner tube bundle Download PDFInfo
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- CN109622587A CN109622587A CN201910046225.3A CN201910046225A CN109622587A CN 109622587 A CN109622587 A CN 109622587A CN 201910046225 A CN201910046225 A CN 201910046225A CN 109622587 A CN109622587 A CN 109622587A
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- 239000002689 soil Substances 0.000 title claims abstract description 76
- 238000003795 desorption Methods 0.000 title claims abstract description 47
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 238000012546 transfer Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000005067 remediation Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 52
- 238000012545 processing Methods 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- 239000003345 natural gas Substances 0.000 description 7
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 6
- 239000000306 component Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000002957 persistent organic pollutant Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000003900 soil pollution Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- DXBHBZVCASKNBY-UHFFFAOYSA-N 1,2-Benz(a)anthracene Chemical compound C1=CC=C2C3=CC4=CC=CC=C4C=C3C=CC2=C1 DXBHBZVCASKNBY-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000003694 hair properties Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an external heat rotary type organic contaminated soil thermal desorption device with an inner tube bundle, and belongs to the technical field of contaminated site soil remediation. The device comprises a raw soil feeding device, a rotary external heating type reactor and a clean soil discharging device. The invention provides an external heat rotary type organic contaminated soil thermal desorption device with heat transfer enhancement, which has larger treatment capacity and smaller treatment area under the condition of the same unit treatment energy consumption.
Description
Technical field
The invention belongs to contaminated site technical field of soil remediation, suitable for the reparation of organic contamination place soil, specifically
It is related to a kind of rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe.
Background technique
Soil refers to the loose surface layer that land surface has fertility, is capable of growing plant, when the harmful substance for being discharged into soil
Composition of the soil, structure and function will be caused to change when being excessively more than soil self purification activity, microbial activities is pressed down
Gradually accumulation passes through " soil → plant → human body " in the soil for system, harmful substance or its decomposition product, or passes through " soil → water
→ human body " is absorbed by the body indirectly, reaches the degree being detrimental to health, soil pollution just has occurred.
China is global soil pollution one of the countries with the most serious ..., and to promote enhancement of environment and industry development, State Council is first
" opinion about quickening propulsion Ecological Civilization Construction ", " Soil Pollution Control action plan " etc. have been promulgated afterwards.As country " moves back
Two into three ", the appearance of the policies such as " garden Tui Chengjin ", many industrial production lands used start to be changed into inhabitation, quotient's clothes and park irrigation
Land used has obtained more and more extensive concern to the reparation of contaminated soil of site.
Seriously polluted place mainly includes chemical plant, insecticide factory, smeltery, gas station, chemical drum etc. at present, this
The pollutant in class place mainly based on organic contamination, can be divided into volatile organic matter according to its difference for melting boiling point again, partly wave
Hair property organic matter, persistent organism and pesticide etc..The recovery technique of this kind of contaminated soil includes burning (at cement kiln collaboration
Set), phytoremediation, biological prosthetic, chemical remediation and thermal desorption etc., wherein thermal desorption technology has that treatment effeciency is high, repairs week
The advantages that phase is short, device is removable is widely used in volatilization/half volatile organic contamination site remediation, U.S. EPA statistics display
Thermal desorption accounts for 20~30% in American-European site remediation case, is one of site remediation major technique.
Thermal desorption technology is so that the contaminated soil excavated is heated to the boiling point of target contaminant by directly or indirectly heating
More than, pollutant gasification volatilization is selectively made by control system temperature and residence time of material, makes target contaminant and soil
The separation of earth particle, removal.There are mainly two types of thermal desorption systems, and one is direct thermal desorption systems, i.e., is directly connect using hot fume
Heating soil is touched to assigned temperature, the system heat exchange efficiency is higher, but since the organic pollutant being desorbed out is directly entered flue gas
In, the treating capacity and processing difficulty of tail gas are larger, and processing cost is higher；Another kind is indirect thermal desorption system, i.e., by soil and
Hot fume separates, and by hot spiral or hollow blade reactor indirect heating soil, vent gas treatment amount is smaller, processing difficulty compared with
It is low, but since the indirect thermal desorption heat transfer efficiency of the hot spiral of the prior art is lower, while being contacted in helical rotation with soil, it wears
Seriously, high failure rate, replacement are difficult.
Patent CN201510207851.8 discloses a kind of indirect thermal desorption device of soil, with natural gas, diesel oil or biomass
Fuel is handled soil with the indirect thermal desorption device of two-part flood dragon, and first segment flood dragon is mainly dried soil, the
Two sections of flood dragons carry out thermal desorption to soil, and thermal desorption temperature is 200~650 DEG C.Patent CN201721127402.3 and
CN201621177931.X has invented a kind of hot helical reactors of indirect heat exchange, some also use external-heat auger thermal desorption machine
It is usually present as its core component since this external-heat auger thermal desorption machine is for the higher material of aqueous, oil content
Adhesion problem, the thermal efficiency is very low, and due to the limitation for the Spiral Notebook body structure that is heated, single machine treating capacity is lower, generally 1.5t/
H can only take multi-machine parallel connection when needing more high throughput, and system complex takes up a large area, and since thermal desorption device usually needs
It moves, quickly assemble, series in parallel is restricted, typically not greater than two-stage, and single set equipment disposing capacity is no more than 3t/h.
Summary of the invention
The outer heat that the present invention provides a kind of beam with inner pipe for defect existing for existing above-mentioned technology is rotary organic
Contaminated soil thermal desorption device.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe, the device include original soil charging dress
It sets, turn round external-heat reactor, pure land discharging device；
The original soil feeding device includes original soil feed inlet, feeding gas lock and the feeding spiral conveyer being sequentially connected；
The pure land discharging device includes blanking gas lock and pure land discharge port；The revolution external-heat reactor includes revolving drum
Body, shell, front end-plate and end plate, and rotating cylinder, shell, front end-plate and the end plate is closed to form heat transfer cavity；
The heat transfer cavity is divided into external cavity and internal cavity, the front baffle and rear bulkhead by front baffle and rear bulkhead
It is located at the head and tail portion of shell；The external cavity is that front baffle, rear bulkhead, shell and rotating cylinder outer wall surround
Space；The internal cavity is front baffle, rear bulkhead, front end-plate and end plate and the interior tube bank for being located at turn around inner barrel
The space of formation；
The outer gas inlet of the cylinder of external cavity is between front end-plate and rear bulkhead, before the outer exhanst gas outlet of the cylinder of external cavity is located at
Between partition and end plate；In the cylinder of internal cavity between gas inlet rear bulkhead and end plate, exhanst gas outlet in the cylinder of internal cavity
Between front end-plate and front baffle；
The both ends of said inner tube beam are connected to internal cavity after being each passed through rotating cylinder but completely cut off with soil processed；And institute
The outer cylinder wall for stating rotating cylinder is that surface is equipped with raised irregular cylinder or regular cylinder.
In technical solution of the present invention: the protrusion is polygon facet or arc surface or oval arc surface or s shape face.Some
In preferred technical solution: the polygon facet is arc surface or s shape face.
In some more preferably technical solutions: at least provided with 8 protrusions on the section of the rotating cylinder, and protrusion
Base width >=60 ㎜.
In some most preferred technical solutions: the interior envelope and external envelope of the rotating cylinder are circle.
In technical solution of the present invention: the protrusion is the helical form centered on rotating cylinder central axis；It is preferred that: raised spiral shell
The screw pitch for revolving shape is not more than rotating cylinder length.
In some specific technical solutions: spiral helicine rotating cylinder is to fix one end of rotating cylinder, the other end
Rotation, cylinder convex to form helical form, can dramatically increase the exterior surface area of cylinder, and the heat exchange of the outer flue gas of enhancing cylinder and cylinder is imitated
Fruit；And helical form concavity channel can be formed in the inner surface of cylinder, extend residence time of the soil in cylinder, in same cylinder
The longer time can be stopped under length, to increase unit time processing capacity in the case where not changing occupied area；Or
It is to shorten in same processing capacity lower shell length, so that reducing equipment under same unit time processing capacity takes up an area face
Product.
In technical solution of the present invention: the front end of rotating cylinder and drive shaft are connected to support on preceding supporting roller component, turn round
Cylinder passes through end plate and is supported on rear supporting roller component, and drive shaft is driven by driving device to be rotated.
In some preferred technical solutions: drive shaft is sealed by conveyor front barrel and is sealed with front end-plate, rotating cylinder
It is sealed by rear cylinder body and is sealed with end plate.
In technical solution of the present invention: said inner tube beam includes the pipe group that at least one set of straight tube and elbow are connected to form, directly
Pipe is fixed after tube sheet with tube sheet, and elbow is fixed with rotating cylinder after passing through rotating cylinder and is connected to internal cavity.
In technical solution of the present invention: the interior tube bank accounts for the intracorporal useful space of revolving drum no more than 30%；It is preferred that: institute
It is 12~20% that the interior tube bank stated, which accounts for the intracorporal useful space of revolving drum,.
In technical solution of the present invention: the circumference uniform distribution of the interior tube bank and the inner wall along rotating cylinder, straight tube wall surface from
The distance of rotating cylinder inner wall is 0.5~1.5d, wherein the d is straight tube interior diameter.
In technical solution of the present invention: the interior tube bank is uniformly distributed along the central axis of rotating cylinder, outmost turns straight tube wall surface from
The distance of rotating cylinder inner wall is 0.5~0.85D, and the D is rotating cylinder interior diameter.
In technical solution of the present invention: the straight tube is at least one of spirally corrugated tube, contracting line pipe or internally finned tube；
In some preferred technical solutions: the heat transfer cavity volume is the 60~90% of rotating cylinder cavity volume；
In some more preferably technical solutions: the center line of the rotating cylinder is relative to the past discharging of casing centerline
0~3 ° of end inclination.
In technical solution of the present invention: the inner cavity of the rotating cylinder is provided with spiral stock guide and/or lifting blade；
In some specific technical solutions: the drive shaft is hollow structure, and feeding spiral conveyer is mounted on driving
In axis, the discharge end of feeding spiral conveyer protrudes into 15~40mm of rotating cylinder.
In some specific technical solutions: the rotating cylinder uses heat-resistance stainless steel material, and external shell is fire resisting
Fibre structure；
In some specific technical solutions: the inner wall of the shell is equipped with insulating.
In some specific technical solutions: driving device includes the driving gear being connected with drive shaft and and drives
The driving motor of moving gear cooperation.
In some specific technical solutions: the original soil feeding device, pure land discharging device are connected with rotating cylinder
Logical, the pure land discharging device side of rotating cylinder is exported equipped with thermal desorption gas.
In technical solution of the present invention: the temperature of gas inlet is 100 DEG C~600 DEG C in the cylinder.
In technical solution of the present invention: the temperature of the outer gas inlet of the cylinder is 100 DEG C~600 DEG C.
In technical solution of the present invention: the temperature of the outer gas inlet of the spool is 50 DEG C higher than the temperature of gas inlet in cylinder~
100℃。
In technical solution of the present invention: motor variable-frequency speed-regulating, speed adjustable range 0.1-3r/min.
In technical solution of the present invention: preceding rolling ring is located at turn around cylinder stem, front end-plate outside, and rear rolling ring is located at turn around cylinder
Tail portion, end plate outside.
In technical solution of the present invention: hood is mounted on rotating cylinder tail end, with connection in rotating cylinder and close equipped with rotating
Seal apparatus.
In technical solution of the present invention: reinforcing rib and manhole are located on shell, and reinforcing rib plays reinforcement structure, and manhole is for examining
It repairs.Rotating cylinder linkage section is located between conveyor front barrel sealing and preceding rolling ring.
In other technical solutions: the interior wall of the rotating cylinder is and the matched structure of outer cylinder wall or the revolution
The depressed area of the interior wall of cylinder is solid construction.
Beneficial effects of the present invention:
The present invention provides a kind of rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe, which exists
Same units have biggish treating capacity and lesser processing area in the case where handling energy consumption.
Detailed description of the invention
Fig. 1 is the left side view of thermal desorption device；
Fig. 2 is the front view of thermal desorption device；
Fig. 3 is thermal desorption device full sectional view；
Fig. 4 is thermal desorption device top view；
Fig. 5 is thermal desorption device right side view；
Fig. 6 is thermal desorption device 3-D view；
Fig. 7 is that thermal desorption device rotating part is faced；
Fig. 8 is thermal desorption device rotating part cross-sectional view；
Fig. 9 is thermal desorption device rotating part 3-D view.
Figure 10 is the helical form rotating cylinder of gore, in which: Figure 10 (a) is that the helical form that protrusion is gore is returned
The main view of drum body, Figure 10 (b) are the A-A cross-sectional views of Figure 10 (a).
Figure 11 is the helical form rotating cylinder of semicircle cambered surface, in which: Figure 11 (a) is that the helical form that protrusion is semicircle cambered surface is returned
The main view of drum body, Figure 11 (b) are the A-A cross-sectional views of Figure 11 (a).
Figure 12 is the helical form rotating cylinder in s shape face, in which: Figure 12 (a) is the helical form rotating cylinder that protrusion is s shape face
Main view, Figure 12 (b) is the A-A cross-sectional view of Figure 12 (a).
1-original soil feed inlet, 2-feeding gas locks, 3-feeding spiral conveyers, 4-driving devices, 5 connect for rotating cylinder
Connect section, 6-preceding supporting roller components, 7-rear supporting roller components, 8-insulatings, the outlet of 9-thermal desorption gas, 10-hoods, 11-
Shell, exhanst gas outlet in 12-cylinders, the outer exhanst gas outlet of 13-cylinders, the outer gas inlet of 14-cylinders, gas inlet in 15-cylinders, 16-
Blanking gas lock, 17-pure land discharge ports, 18-driving gears, 19-driving motors, the sealing of 20-conveyor front barrels, 21-rear cylinder bodies are close
Envelope, 22-preceding rolling rings, 23-rear rolling rings, 24-interior tube banks, 25-rotating cylinders, 26-reinforcing ribs, 27-manholes, 28-front ends
Plate, 29-end plates, 30-drive shafts, 31-heat transfer cavities, 32-front baffles, 33-rear bulkheads, 34-external cavities, 35-is interior
Cavity, 36-straight tubes, 37-elbows, 38-tube sheets, 101-original soil feeding devices, 102-revolution external-heat reactors, 103-
Pure land discharging device.
Specific embodiment
Below with reference to embodiment, the invention will be further described, and but the scope of the present invention is not limited thereto:
Such as Fig. 1~9, a kind of rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe, which includes
Original soil feeding device (101), revolution external-heat reactor (102), pure land discharging device (103)；
The original soil feeding device (101) includes the original soil feed inlet (1) being sequentially connected, feeding gas lock (2) and charging
Screw conveyor (3)；The pure land discharging device (103) includes blanking gas lock (16) and pure land discharge port (17)；It is described
Revolution external-heat reactor (102) includes rotating cylinder (25), shell (11), front end-plate (28) and end plate (29), and institute
Rotating cylinder (25), shell (11), front end-plate (28) and end plate (29) closing stated form heat transfer cavity (31)；
The heat transfer cavity (31) is divided into external cavity (34) and internal cavity (35) by front baffle (32) and rear bulkhead (33),
The front baffle (32) and rear bulkhead (33) is located at the head and tail portion of shell；The external cavity (34) is front baffle
(32), the space that rear bulkhead (33), shell (11) and rotating cylinder (25) outer wall surround；The internal cavity (35) be it is preceding every
Plate (32), rear bulkhead (33), front end-plate (28) and end plate (29) and the interior tube bank (24) for being located at turn around cylinder (25) inside
The space of formation；
The outer gas inlet (14) of the cylinder of external cavity (34) is located between front end-plate (28) and rear bulkhead (33), external cavity (34)
The outer exhanst gas outlet (13) of cylinder be located between front baffle (32) and end plate (29)；Gas inlet (15) in the cylinder of internal cavity (35)
Between rear bulkhead (33) and end plate (29), exhanst gas outlet (12) is located at front end-plate (28) and front baffle in the cylinder of internal cavity (35)
(32) between；
The both ends of said inner tube beam (24) be each passed through rotating cylinder (25) be connected to afterwards with internal cavity (35) but with it is processed
Soil isolation；
The rotating cylinder (25) and the outer flue gas contact portion of cylinder are regular cylinder.
The original soil feeding device (101), pure land discharging device (103) are connected with rotating cylinder (25), revolving drum
Pure land discharging device (103) side of body (25) is equipped with thermal desorption gas outlet (9)；
The front end and drive shaft (30) of rotating cylinder (25) are connected to support on preceding supporting roller component (6), rotating cylinder
(25) end plate (29) are passed through and are supported on rear supporting roller component (7), drive shaft (30) passes through driving device (4) driving rotation；
It is preferred that: drive shaft (30) is sealed by conveyor front barrel sealing (20) with front end-plate (28), and rotating cylinder (25) passes through rear cylinder body
Sealing (21) is sealed with end plate (29).
Said inner tube beam (24) includes the pipe group that at least one set of straight tube (36) and elbow (37) are connected to form, straight tube (36)
It is fixed with tube sheet (38) afterwards across tube sheet (38), elbow (37) pass through rotating cylinder (25) it is fixed with rotating cylinder (25) afterwards and with
Internal cavity (35) connection.
The useful space in rotating cylinder (25) shared by the interior tube bank (24) is no more than 30%；It is preferred that: described is interior
Restraining the useful space in rotating cylinder (25) shared by (24) is 12~20%.
The circumference uniform distribution of the interior tube bank (24) and the inner wall along rotating cylinder (25), straight tube (36) wall surface is from revolving drum
The distance of body (25) inner wall is 0.5~1.5d, wherein the d is straight tube (36) interior diameter.Or the interior tube bank (24)
Central axis along rotating cylinder (25) is uniformly distributed, and outmost turns straight tube (36) wall surface is 0.5 with a distance from rotating cylinder (25) inner wall
~0.85D, the D are rotating cylinder (25) interior diameter.
The straight tube (36) is at least one of spirally corrugated tube, contracting line pipe or internally finned tube.
Heat transfer cavity (31) volume is the 60~90% of rotating cylinder (25) cavity volume；The rotating cylinder (25)
Center line relative to shell (11) center line toward discharge end tilt 0~3 °.
The inner cavity of the rotating cylinder (25) is provided with spiral stock guide and/or lifting blade；
It is preferred that: the drive shaft (30) is hollow structure, and feeding spiral conveyer (3) is mounted in drive shaft (30), into
The discharge end of material screw conveyor (3) protrudes into (25) 15~40mm of rotating cylinder；
The rotating cylinder (25) uses heat-resistance stainless steel material, and external shell (11) is refractory fibre structure.
Be placed with inertia heat-carrying ball in the rotating cylinder (25), the inertia heat-carrying ball material be steel ball, alloying pellet and
At least one of Ceramic Balls, form are medicine ball or hollow sphere, and the hollow ball inside fills heat-carrying agent, the load
Thermal medium is fused salt.The inner wall of the shell (11) is equipped with insulating (8)；Driving device (4) includes and drive shaft
(30) the driving gear (18) being connected and the driving motor (19) with driving gear (18) cooperation.
Parameter involved in 1 Examples 1 to 3 of table
Embodiment 1:
Organic pollutant is handled using above-mentioned apparatus, design parameter condition is shown in Table 1.
Process object:
Moisture percentage 20%, toluene, dimethylbenzene effumability organic polluted soil processing parameter:
In cylinder 650 DEG C of temperature of gas inlet (16), 700 DEG C of temperature of cylinder outer gas inlet (14), soil residence time 30min
When, tube bank exhanst gas outlet (15) temperature is 220 DEG C, and outer exhanst gas outlet (13) temperature of cylinder is 260 DEG C, treating capacity 7.4t/h, first
The initial mean concentration of benzene, dimethylbenzene is 500mg/kg, and mean concentration is lower than 5.0mg/kg after processing, and removal rate reaches
99%, averagely heat soil consumption 40Nm per ton3/ h natural gas；
In cylinder 700 DEG C of temperature of gas inlet (16), 750 DEG C of temperature of cylinder outer gas inlet (14), soil residence time 30min
When, tube bank exhanst gas outlet (15) temperature is 260 DEG C, and outer exhanst gas outlet (13) temperature of cylinder is 300 DEG C, treating capacity 7.4t/h, first
The initial mean concentration of benzene, dimethylbenzene is 500mg/kg, and mean concentration is lower than 1.0mg/kg after processing, and removal rate reaches
99.9%, averagely heat soil consumption 45Nm per ton3/ h natural gas；
Embodiment 2:
Organic pollutant is handled using above-mentioned apparatus, design parameter condition is shown in Table 1.
Moisture percentage 20%, six six six, DDTs pesticide half volatile organic polluted soil processing parameter:
In cylinder 700 DEG C of temperature of gas inlet (16), 750 DEG C of temperature of cylinder outer gas inlet (14), soil residence time 30min
When, exhanst gas outlet (12) temperature is 260 DEG C in cylinder, and outer exhanst gas outlet (13) temperature of cylinder is 300 DEG C, treating capacity 7.4t/h, six
Six or six, the initial mean concentration of DDTs is 300mg/kg, and mean concentration is lower than 6.0mg/kg after processing, and removal rate reaches
98%, averagely heat soil consumption 45Nm per ton3/ h natural gas；
In cylinder 750 DEG C of temperature of gas inlet (16), 800 DEG C of temperature of cylinder outer gas inlet (14), soil residence time 30min
When, exhanst gas outlet (12) temperature is 300 DEG C in cylinder, and outer exhanst gas outlet (13) temperature of cylinder is 340 DEG C, treating capacity 7.4t/h, six
Six or six, the initial mean concentration of DDTs is 300mg/kg, and mean concentration is lower than 3.0mg/kg after processing, and removal rate reaches
99%, averagely heat soil consumption 50Nm per ton3/ h natural gas；
Embodiment 3:
Organic pollutant is handled using above-mentioned apparatus, design parameter condition is shown in Table 1.
Moisture percentage 20%, benzanthracene, BaP multiring aromatic hydrocarbon difficulty volatility organic polluted soil processing parameter:
In cylinder 750 DEG C of temperature of gas inlet (16), 800 DEG C of temperature of cylinder outer gas inlet (14), soil residence time 30min
When, exhanst gas outlet (12) temperature is 300 DEG C in cylinder, and outer exhanst gas outlet (13) temperature of cylinder is 340 DEG C, treating capacity 7.4t/h, benzene
And the initial mean concentration of anthracene, BaP is 100mg/kg, mean concentration is lower than 2.0mg/kg after processing, and removal rate reaches
98%, averagely heat soil consumption 50Nm per ton3/ h natural gas；
In cylinder 800 DEG C of temperature of gas inlet (16), 850 DEG C of temperature of cylinder outer gas inlet (14), soil residence time 30min
When, exhanst gas outlet (12) temperature is 340 DEG C in cylinder, and outer exhanst gas outlet (13) temperature of cylinder is 380 DEG C, treating capacity 7.4t/h, benzene
And the initial mean concentration of anthracene, BaP is 100mg/kg, mean concentration is lower than 5.0mg/kg after processing, and removal rate reaches
95%, averagely heat soil consumption 55Nm per ton3/ h natural gas.
Embodiment 4~6
The condition of pollutant process is with embodiment 1, in addition to the outer cylinder wall of the rotating cylinder (25) is that surface is equipped with protrusion
Irregular cylinder.Such as Figure 10~12, the protrusion is polygon facet or arc surface or oval arc surface or s shape face, semi arch
Face or gore；At least provided with 16 protrusions on the section of the rotating cylinder (25), and base width >=60 ㎜ of protrusion；
The interior envelope and external envelope of the rotating cylinder (25) are circle.The protrusion is centered on rotating cylinder (25) central axis
Helical form；And the screw pitch of raised spiral shape is not more than rotating cylinder (25) length.Design parameter is shown in Table 2.
Parameter involved in 2 embodiment 4~6 of table
Comparative example 1
Comparative example 1 is with embodiment 1, in addition to being not provided with interior tube bank in the rotating cylinder.
Performance detection:
The treatment effect of Examples 1 to 6 and comparative example 1
| Project | Treating capacity (t/h) | Occupied area (m2) | Processed in units amount energy consumption |
| Embodiment 1 | 6.3 | 50 | It is identical |
| Embodiment 2 | 6.3 | 50 | It is identical |
| Embodiment 3 | 6.3 | 50 | It is identical |
| Embodiment 4 | 7.4 | 50 | It is identical |
| Embodiment 5 | 7.4 | 50 | It is identical |
| Embodiment 6 | 7.4 | 50 | It is identical |
| Comparative example 1 | 2.1 | 50 | It is identical |
Claims (10)
1. a kind of rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe, it is characterised in that:
The device includes original soil feeding device (101), revolution external-heat reactor (102), pure land discharging device (103)；
The original soil feeding device (101) includes original soil feed inlet (1), feeding gas lock (2) and the feed auger being sequentially connected
Conveyer (3)；The pure land discharging device (103) includes blanking gas lock (16) and pure land discharge port (17)；The revolution
External-heat reactor (102) includes rotating cylinder (25), shell (11), front end-plate (28) and end plate (29), and described
Rotating cylinder (25), shell (11), front end-plate (28) and end plate (29) closing form heat transfer cavity (31)；
The heat transfer cavity (31) is divided into external cavity (34) and internal cavity (35) by front baffle (32) and rear bulkhead (33), described
Front baffle (32) and rear bulkhead (33) be located at the head and tail portion of shell；The external cavity (34) is front baffle
(32), the space that rear bulkhead (33), shell (11) and rotating cylinder (25) outer wall surround；The internal cavity (35) be it is preceding every
Plate (32), rear bulkhead (33), front end-plate (28) and end plate (29) and the interior tube bank (24) for being located at turn around cylinder (25) inside
The space of formation；
The outer gas inlet (14) of the cylinder of external cavity (34) is located between front end-plate (28) and rear bulkhead (33), the cylinder of external cavity (34)
Outer exhanst gas outlet (13) is located between front baffle (32) and end plate (29)；In the cylinder of internal cavity (35) after gas inlet (15) every
Between plate (33) and end plate (29), exhanst gas outlet (12) is located at front end-plate (28) and front baffle (32) in the cylinder of internal cavity (35)
Between；
The both ends of the interior tube bank (24) be each passed through rotating cylinder (25) be connected to afterwards with internal cavity (35) but with soil processed
Earth isolation.
2. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the front end and drive shaft (30) of rotating cylinder (25) are connected to support on preceding supporting roller component (6), and rotating cylinder (25) is worn
Later it end plate (29) and is supported on rear supporting roller component (7), drive shaft (30) passes through driving device (4) driving rotation；It is preferred that: it drives
Moving axis (30) is sealed by conveyor front barrel sealing (20) with front end-plate (28), and rotating cylinder (25) seals (21) by rear cylinder body
It is sealed with end plate (29).
3. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: said inner tube beam (24) includes the pipe group that at least one set of straight tube (36) and elbow (37) are connected to form, and straight tube (36) is worn
It is fixed with tube sheet (38) afterwards to cross tube sheet (38), elbow (37) pass through rotating cylinder (25) it is fixed with rotating cylinder (25) afterwards and with it is interior
Cavity (35) connection.
4. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the useful space in rotating cylinder (25) shared by the interior tube bank (24) is no more than 30%；It is preferred that: the interior tube bank
(24) useful space in rotating cylinder shared by (25) is 12~20%.
5. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the circumference uniform distribution of the interior tube bank (24) and the inner wall along rotating cylinder (25), straight tube (36) wall surface is from rotating cylinder
(25) distance of inner wall is 0.5~1.5d, wherein the d is straight tube (36) interior diameter.
6. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the interior tube bank (24) is uniformly distributed along the central axis of rotating cylinder (25), and outmost turns straight tube (36) wall surface is from rotating cylinder
(25) distance of inner wall is 0.5~0.85D, and the D is rotating cylinder (25) interior diameter.
7. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the straight tube (36) is at least one of spirally corrugated tube, contracting line pipe or internally finned tube.
8. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: heat transfer cavity (31) volume is the 60~90% of rotating cylinder (25) cavity volume.
9. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the center line of the rotating cylinder (25) tilts 0~3 ° toward discharge end relative to shell (11) center line.
10. the rotary organic polluted soil thermal desorption device of outer heat of beam with inner pipe according to claim 1, feature
Be: the inner cavity of the rotating cylinder (25) is provided with spiral stock guide and/or lifting blade；
It is preferred that: the drive shaft (30) is hollow structure, and feeding spiral conveyer (3) is mounted in drive shaft (30), feeds spiral shell
The discharge end of rotation conveyer (3) protrudes into (25) 15~40mm of rotating cylinder；
It is preferred that: the rotating cylinder (25) uses heat-resistance stainless steel material, and external shell (11) is refractory fibre structure；
It is preferred that: the inner wall of the shell (11) is equipped with insulating (8)；
It is preferred that: driving device (4) includes the driving gear (18) being connected with drive shaft (30) and and driving gear (18)
The driving motor (19) of cooperation.
It is preferred that: the original soil feeding device (101), pure land discharging device (103) are connected with rotating cylinder (25), revolving drum
Pure land discharging device (103) side of body (25) is equipped with thermal desorption gas outlet (9).
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