CN208527685U - A kind of indirect thermal desorption device of contaminated soil electric heating - Google Patents
A kind of indirect thermal desorption device of contaminated soil electric heating Download PDFInfo
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- CN208527685U CN208527685U CN201821124121.7U CN201821124121U CN208527685U CN 208527685 U CN208527685 U CN 208527685U CN 201821124121 U CN201821124121 U CN 201821124121U CN 208527685 U CN208527685 U CN 208527685U
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- thermal desorption
- contaminated soil
- electric heating
- indirect thermal
- desorption device
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Abstract
The utility model provides a kind of indirect thermal desorption device of contaminated soil electric heating, wherein screw(-type) feeder is connected with inner cylinder feed inlet, and inner cylinder is at the uniform velocity rotated with the rotation of support roller, and outer tube inner surface lays ceramic fiber cotton, and heat tape is fixed on heat-preservation cotton surface.The temperature detector is connected with electrical control system, by feeding back real time temperature, adjusts input electricity.The energy that the utility model uses electric energy to replace liquefied natural gas or fuel oil as traditional thermal desorption equipment, pyrolysis system as the indirect thermal desorption technology of contaminated soil/bed mud, it is combined with exhaust system, the pollutant emission risk generated by fuel combustion can be reduced, can stablize, continuously, efficiently carry out thermal desorption processing, organic material contaminated soil/bed mud disposition suitable for different type, concentration.In addition, the removableization degree of complete equipment is higher due to not needing that special liquefied gas station or fuel oil station is arranged.
Description
Technical field
The utility model belongs to technical field of soil remediation, in particular to a kind of contaminated soil electric heating indirect thermal
Desorption apparatus can be used for organic polluted soil dystopy thermal desorption reparation.
Background technique
The main operational principle of thermal desorption or Thermal desorption is exactly the volatility for enhancing pollutant with thermal energy, thus by dirty
Dye object is separated from contaminated soil or deposit, and is focused in advance to this some of the contaminants.Under normal conditions, heat is de-
Attached system includes Thermal desorption unit and exhaust treatment system this two big module.
Compared to conventional repair techniques, thermal desorption technology it is with the obvious advantage, have super large-scale pollutant process ability,
Its equipment is removable, using flexible, and recycles through its soil after repairing is recyclable, and it is this kind of containing chlorine to be particularly suitable for PCBs
The separating treatment of organic matter, it is possible to prevente effectively from the generation of dioxin.In view of the advantage performance of thermal desorption technology, at this stage very much
Soil thermal desorption technology is engineered by American-European countries, achieves breakthrough in high concentration organic polluted soil reparation.
But it is expensive by relevant device, operating cost is excessively high, desorption time is too long etc., and a variety of factors are limited,
Thermal desorption technology is not used widely also in persistency organic contaminant soil remediation.In addition, the combustion of traditional thermal desorption device
Material mostly uses liquefied natural gas or fuel oil, needs to build interim natural gas or fuel storage tanks.However, local government is for safety
It considers, a series of approval process is extremely complex.Moreover, in recent years due to the increasing of national gas consumption, some areas occur
" gas is waste " phenomenon.
A kind of organic dirt of two-part indirect thermal desorption process of the Invention Announce of 104874593 A of Patent No. CN
Indigenous method and equipment are contaminated, the organic polluted soil in the reverse indirect heating rotary kiln of heat generated using combustion gas (oil), low
Warm waste heat section exit is drawn the water vapour generated and is condensed, and prevent that water vapour from entering that high temperature section heating causes heat need not
It loses.But it is relatively more limited to supply the regional application such as inadequate for natural gas, fuel oil etc. for the covering device；Moreover, the device
Organic exhaust gas is handled using dual firing chamber, increases system energy consumption and overall cost of disposal.
A kind of contaminated soil heat of the Invention Announce of 104307865 A of Patent No. CN drives desorption repair system and method,
Using waste heats such as high-temperature flue gas, high temperature air, high-temperature steam or high-temp liquids as heat source, contaminated soil is carried out using indirect heating and is repaired
Multiple process.The shortcoming of the method is, which is necessarily mounted near the equipment for generating such heat source, if the equipment away from
Farther out from contaminated site, contaminated soil freight increases, and improves processing cost, less economical.
A kind of indirect thermal desorption disposition dress of persistent pollution soil of the Invention Announce of 104226681 A of Patent No. CN
It sets and method, kiln body concentric co-axial inside and outside the double-layered cylinder rotary kiln type furnace body, contaminated soil is between inside and outside kiln body
Aperture sections carry out thermal desorption disposition, and the aperture sections height between inside and outside kiln body is 20~35cm；In heat source is respectively acting on
The outer wall of the inner wall of kiln body and outer kiln body enhances heating effect；The outer kiln body inner wall of double-layered cylinder rotary kiln type furnace body sets multiple
Shovelling plate realizes that soil is run in the intracorporal traveling of rotary kiln type furnace by shovelling plate.Multiple copy is arranged in outer kiln body inner wall in the invention
The design of plate increases the expense and difficulty of system operation and maintenance.
The above dystopy thermal desorption system or device have the shortcomings that energy sources are limited, and there are fuel combustions to generate two
The risks such as secondary pollution.
Utility model content
Purpose of the utility model is to solve the above-mentioned problems of the prior art, and then provide a kind of contaminated soil
The indirect thermal desorption device of electric heating.
The purpose of this utility model is achieved through the following technical solutions:
A kind of indirect thermal desorption device of contaminated soil electric heating, comprising: charging belt, feed bin, screw(-type) feeder, kiln hood
Cover, outer cylinder, ceramic fiber cotton, heat tape, inner cylinder, helical blade, feed inlet, discharge port, kiln hood, offgas outlet, support roller,
Discharge port, temperature detector, electrical control system and electric energy feed system, which is characterized in that the charging belt enters with feed bin
Mouth is connected, and bin outlet is connected with screw(-type) feeder entrance, and screw(-type) feeder outlet is connected with the feed inlet of inner cylinder, makes pottery
Porcelain cellucotton is laid in the inner surface of outer cylinder, and heat tape is ordered on ceramic fiber cotton, and electric energy feed system passes through electricity
Device control system is connected with heat tape and temperature detector, and inner cylinder is at the uniform velocity rotated with the rotation of support roller.
Further, the heat tape is high resistance high temperature-resistant electrothermal alloy resistance band, is arranged to up and down U-shaped back and forth,
The inner surface of ceramic fiber cotton is mounted on by threaded ceramics nail.
Further, the high resistance high temperature-resistant electrothermal alloy resistance band is that Cr20Ni80 resistance alloys heats bandlet, function
Rate density is 1W/cm2, 1400 DEG C of maximum operation (service) temperature.
Further, the ceramic fiber cotton includes multiple cellucotton modules, between by ceramics nail with fixation, ceramics nail
Surface local setting insulation glaze layer.
Further, the heat tape is that Cr20Ni80 resistance alloys heats bandlet, power density 1W/cm2, highest
Use 1400 DEG C of temperature.
Further, the outer cylinder furnace body of the indirect thermal desorption processing unit of the electric heating is 310S stainless steel cylinder, inner cylinder
Furnace body is 316L stainless steel cylinder, and cylinder steel plate is 8mm.
Further, the inner cylinder inner wall is equipped with multiple helical blades, and helical blade height is 15~25cm.
Further, the temperature detector is K Graduation Number thermocouple, is arranged between inner barrel and outer barrel.
Further, the K Graduation Number thermocouple that the temperature detector is 0-1200 DEG C, quantity are 8.
The utility model has the beneficial effects that
If the fuel of traditional thermal desorption device is using liquefied natural gas or fuel oil, need to build interim natural gas or combustion
Oily holding vessel.However, local government, for safety grounds, a series of approval process is extremely complex.Moreover, in recent years due to complete
There is " gas is waste " phenomenon in the increasing of state's gas consumption, some areas.If natural gas or fuel oil will be burnt, it is changed to using electricity
Can, heat is provided for thermal desorption device, there will be following advantage:
1, electric energy is a kind of energy of clean and environmental protection the most, and the process for providing energy not will increase vent gas treatment burden；And
And energy source is more extensive, safety, economy；It is production, easy to use, will not be because of the whole nation " gas waste " the problems such as, occur energizing not
Foot；In addition, electric energy can effectively improve efficiency of energy utilization, energy waste is reduced.Industrial Stoves efficiency is 40% or so, electrical kiln
The efficiency of furnace is up to 70%-80%.
2, using electric energy, without installation burner, thermal desorption equipment becomes more succinct.Moreover, because not needing to be arranged
The removableization degree of special liquefied gas station or fuel oil station, complete equipment is higher.
3, due to using liquefied natural gas or fuel oil etc., there is very big security risk, so needing many examination & approval.Compared to
Burn natural gas, can be much less safety examination & approval link using electric energy, be more advantageous to the implementation of smoothly honouring an agreement of engineering project.
In conclusion electricity consumption will be changed to gas, front end Soil Thermal desorption process is carried out, there is great practical value and work
Cheng Yiyi.
The utility model has following points advantage:
1, inner cylinder and outer cylinder are isolated entirely from by the utility model, interior when can avoid processing high concentration organic polluted soil
Tail gas and open fire are in contact and generate the risk of explosion in cylinder.
2, every section of the outer cylinder of the utility model series connection, may be implemented independently to control, ensure that temperature in inner cylinder
Controllability, when rehabilitating soil can targetedly adjust temperature variation curve of the soil in inner cylinder, it is ensured that soil is repaired
It is multiple up to standard.
3, the utility model adds kiln head cover and kiln hood in feed end, the discharge end of inner cylinder respectively, can prevent in inner cylinder
Tail gas leakage.
Detailed description of the invention
Fig. 1 is the structure principle chart of the indirect thermal desorption processing unit of electric heating provided by the utility model.
Appended drawing reference in figure:
1- charging belt, 2- feed bin, 3- screw(-type) feeder, 4- kiln head cover, 5- outer cylinder, 6- ceramic fiber cotton, 7- electric heating
Band, 8- inner cylinder, 9- helical blade, 10- feed inlet, 11- discharge port, 12- kiln hood, 13- offgas outlet, 14- support roller, 15- are unloaded
Material mouth, 16- temperature detector, 17- electrical control system, 18- electric energy feed system.
Specific embodiment
Be described in further detail below in conjunction with attached drawing to the utility model: the present embodiment is with the utility model skill
Implemented under premised on art scheme, give detailed embodiment, but the protection scope of the utility model be not limited to it is following
Embodiment.
As shown in Figure 1, a kind of indirect thermal desorption device of contaminated soil electric heating involved in the present embodiment, comprising: feeding
Belt 1, feed bin 2, screw(-type) feeder 3, kiln head cover 4, outer cylinder 5, ceramic fiber cotton 6, heat tape 7, inner cylinder 8, helical blade 9,
Feed inlet 10, discharge port 11, kiln hood 12, offgas outlet 13, support roller 14, discharge port 15, temperature detector 16, electrical equipment control system
System 17 and electric energy feed system 18, which is characterized in that the charging belt 1 is connected with 2 entrance of feed bin, the outlet of feed bin 2 and spiral shell
Rotation 3 entrance of batcher is connected, and the outlet of screw(-type) feeder 3 is connected with the feed inlet 10 of inner cylinder 8, and ceramic fiber cotton 6 is laid in
The inner surface of outer cylinder 5, heat tape 7 are ordered on ceramic fiber cotton 6, and electric energy feed system 18 passes through electrical control system
17 are connected with heat tape 7 and temperature detector 16, and inner cylinder 8 is at the uniform velocity rotated with the rotation of support roller 14.
The inner cylinder furnace body due to contaminated soil Long Term Contact, it is necessary to enhance its corrosion resistance, the outer cylinder furnace
Body uses 310S stainless steel, and inner cylinder furnace body uses 316L stainless steel.Since furnace body is larger, furnace shell steel plate uses 8mm stainless steel plate
It rolls, intensity is high, and integral rigidity is good, the problems such as fully taking into account stove integral strength, frame structure downwarp, deform.It adopts
It is fixed with stainless steel supporting block and outer furnace shell to improve furnace lining structure intensity.
The outer tube inner wall is kept the temperature using ceramic fiber cotton.Ceramic fiber cotton plate is by several pieces of cellucotton module groups
At, between using ceramics nail and other attachmentes fix, ceramics nail carry out the glaze spraying of surface part processing, reach good insulating properties
Energy.Skin temperature reaches code requirement: providing according to GB/T 8175-2008 " equipment and pipe insulation design " directive/guide, insulating layer
Hull-skin temperature is no more than 60 DEG C.
The heat tape uses high resistance high temperature-resistant electrothermal alloy resistance band, is made of nichrome (Cr20Ni80)
Under " u "-shaped back and forth, the inner surface of ceramic fiber cotton is separately mounted to threaded ceramics nail, heated condition is stablized.With tradition
Spiral resistance wire, which is compared, can be improved the thermal efficiency about 15%.According to the heat consumption situation in furnace to heating element reasonable Arrangement,
Heating surface product is big, and radiance is high, and heat transmission resistance is small.The power density of heat tape is 1W/cm2, indirect thermal desorption device point 3
Group, 120kW/ group, general power 360kW.
The temperature detector uses 8 0-1200 DEG C of K Graduation Number thermocouple, is arranged in indirect thermal desorption processing unit
Inner barrel and outer barrel between, the temperature between inner barrel and outer barrel for monitoring indirect thermal desorption processing unit prevents overtemperature mistake
Thermal phenomenon.
Working principle
Firstly, powering on by electrical control system and providing electric energy for indirect thermal desorption processing unit, heat tape will
Electric energy is converted into thermal energy, indirect heating inner cylinder, and the temperature in inner cylinder gradually rises, when inner cylinder reaches certain temperature, organic matter
Contaminated soil into feed bin, then is passed through by broken, screening, adjusting moisture content and except iron etc. pre-processes link by charging belt
Contaminated soil is delivered in inner cylinder and heats by screw(-type) feeder.
The indirect thermal desorption processing unit of electric heating uses the structure of jacket type indirect heating, by coaxial concentric inner cylinder and outside
Cylinder composition, outer cylinder lined ceramics cellucotton heat preservation, reduces heat loss, improves capacity usage ratio；Helical blade pair is equipped in inner cylinder
Soil is conveyed and is stirred, and the rotation speed of inner cylinder is controlled by variable-frequency motor, to adjust stop of the soil in inner cylinder
Time.Organic matter in soil is heated in inner cylinder becomes pyrolysis gas, enters exhaust treatment system through offgas outlet.
The clean soil handled through thermal desorption is discharged from discharge port, is discharged, is transported to by the way of high-temperature closed
Workshop to be checked carries out examination to be checked.The discharge port of kiln hood is provided with explosion-proof valve, when organic concentration is very high in contaminated soil
When, inner cylinder tail gas is likely to form flammable explosive gas, and there are risk of explosion after oxygen is mixed with inner cylinder tail gas in air, explosion-proof
Valve can prevent damage of facilities, protection staff safety in boiler tube tail gas explosion with removal gas pressure.
The preferable specific embodiment of the above, only the utility model, these specific embodiments are all based on this
Different implementations under utility model general idea, and the protection scope of the utility model is not limited thereto, it is any ripe
Know those skilled in the art within the technical scope disclosed by the utility model, any changes or substitutions that can be easily thought of, all
It should cover and be within the protection scope of the utility model.Therefore, the protection scope of the utility model should be with claims
Subject to protection scope.
Claims (8)
1. a kind of indirect thermal desorption device of contaminated soil electric heating, comprising: charging belt (1), feed bin (2), screw(-type) feeder
(3), kiln head cover (4), outer cylinder (5), ceramic fiber cotton (6), heat tape (7), inner cylinder (8), helical blade (9), feed inlet
(10), discharge port (11), kiln hood (12), offgas outlet (13), support roller (14), discharge port (15), temperature detector (16), electricity
Device control system (17) and electric energy feed system (18), which is characterized in that the charging belt (1) is connected with feed bin (2) entrance
Logical, feed bin (2) outlet is connected with screw(-type) feeder (3) entrance, the feed inlet of screw(-type) feeder (3) outlet and inner cylinder (8)
(10) it is connected, ceramic fiber cotton (6) is laid in the inner surfaces of outer cylinder (5), and heat tape (7) is ordered in ceramic fiber cotton
(6) on, electric energy feed system (18) is connected by electrical control system (17) with heat tape (7) and temperature detector (16)
Logical, inner cylinder (8) is at the uniform velocity rotated with the rotation of support roller (14).
2. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 1, which is characterized in that the electricity adds
Tropical (7) are high resistance high temperature-resistant electrothermal alloy resistance band, are arranged to up and down U-shaped back and forth, pass through threaded ceramics nail installation
Inner surface in ceramic fiber cotton (6).
3. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 2, which is characterized in that the high electricity
Hindering high temperature-resistant electrothermal alloy resistance band is that Cr20Ni80 resistance alloys heats bandlet, power density 1W/cm2, highest uses warm
1400 DEG C of degree.
4. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 3, which is characterized in that the ceramics
Cellucotton (6) includes multiple cellucotton modules, between by ceramics nail with fixation, ceramics nail surface local setting insulate glaze layer.
5. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 4, which is characterized in that the electricity adds
The outer cylinder furnace body of hot thermal desorption processing unit indirectly is 310S stainless steel cylinder, and inner cylinder furnace body is 316L stainless steel cylinder, cylinder
Steel plate is 8mm.
6. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 5, which is characterized in that the inner cylinder
Inner wall is equipped with multiple helical blades, and helical blade height is 15~25cm.
7. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 6, which is characterized in that the temperature
Detector (16) is K Graduation Number thermocouple, is arranged between inner barrel and outer barrel.
8. a kind of indirect thermal desorption device of contaminated soil electric heating according to claim 7, which is characterized in that the temperature
The K Graduation Number thermocouple that detector (16) is 0-1200 DEG C, quantity are 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821124121.7U CN208527685U (en) | 2018-07-16 | 2018-07-16 | A kind of indirect thermal desorption device of contaminated soil electric heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821124121.7U CN208527685U (en) | 2018-07-16 | 2018-07-16 | A kind of indirect thermal desorption device of contaminated soil electric heating |
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| CN208527685U true CN208527685U (en) | 2019-02-22 |
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| CN201821124121.7U Active CN208527685U (en) | 2018-07-16 | 2018-07-16 | A kind of indirect thermal desorption device of contaminated soil electric heating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902157A (en) * | 2021-01-26 | 2021-06-04 | 宁夏鑫尔特新能源有限公司 | Pulverized coal efficient catalytic combustion boiler and combustion catalysis method thereof |
| CN113399488A (en) * | 2021-05-27 | 2021-09-17 | 上海五钢设备工程有限公司 | Extrusion container assembling method utilizing BIM technology |
-
2018
- 2018-07-16 CN CN201821124121.7U patent/CN208527685U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902157A (en) * | 2021-01-26 | 2021-06-04 | 宁夏鑫尔特新能源有限公司 | Pulverized coal efficient catalytic combustion boiler and combustion catalysis method thereof |
| CN113399488A (en) * | 2021-05-27 | 2021-09-17 | 上海五钢设备工程有限公司 | Extrusion container assembling method utilizing BIM technology |
| CN113399488B (en) * | 2021-05-27 | 2022-08-02 | 上海五钢设备工程有限公司 | Extrusion container assembling method utilizing BIM technology |
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