CN107639110A - A kind of device for repairing polluted soil - Google Patents
A kind of device for repairing polluted soil Download PDFInfo
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- CN107639110A CN107639110A CN201710981626.9A CN201710981626A CN107639110A CN 107639110 A CN107639110 A CN 107639110A CN 201710981626 A CN201710981626 A CN 201710981626A CN 107639110 A CN107639110 A CN 107639110A
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- comminutor
- polluted soil
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Abstract
The present invention relates to a kind of device for repairing polluted soil, including unit is burned, burn dual firing chamber, heat transmission equipment and the half-dried reactor for being provided with and being sequentially communicated at the exhaust opening of unit；Also include drying unit, drum machine and comminutor, burn unit feed mouth and connected with drying unit discharging opening；Heat transmission equipment exhaust outlet connects with drum machine inlet, and drum machine hot gas outlet connects with drying unit steam air inlet；The steam outlet of drum machine connects with the steam air inlet of comminutor, and the dust outlet of half-dried reactor bottom connects with the charging aperture of comminutor, and the discharging opening of comminutor connects with the charging aperture of drying unit.The device heat utilization ratio of the present invention is high, and heat does not waste substantially caused by fuel combustion, and burning monoreactant consumption reduces, and can effectively reduce rehabilitation cost；The vapor and dry hot gas that drum machine is isolated all are fully utilized, and reduce further processing cost；The secondary pollution during gas cleaning can effectively be avoided.
Description
Technical field
The invention belongs to the contaminated soil remediation field in field of environment engineering technology, particularly one kind to be used for contaminated soil
The device of reparation.
Background technology
The fast development of Chinese Urbanization and national economy, the pollution for largely also exacerbating urban soil are asked
Topic.This to influence to be mainly reflected in a large amount of generations and transfer of pollutant, a big chunk pollutant directly or indirectly enters
In the soil ecology unit for entering city and periphery.Soil was the natural collecting post and purified treatment place of all kinds of discarded objects originally,
But it is excessive to work as each pollutant housed in soil, influences and exceeded the self-purification capacity of soil, so as in hygiene and prevalence
Disease generates harmful influence on learning, and shows that soil have received pollution.The reason for causing soil pollution is a lot, as industrial sludge,
Agricultural garbage, sewage irrigation etc..
Thermal desorption technology is one of major technique of current domestic repairing polluted soil, and the technology is with directly or indirectly
Heat exchange heat, the organic volatile in soil and half volatile matter is reached sufficiently high temperature, make its evaporate and with soil matchmaker
Be situated between the process being separated.Heat transferring medium in thermal desorptor is air, combustion gas, inert gas etc., and thermal desorption process is
Pollution components enter the physical process of gas phase from solid phase (liquid phase) heat transfer in soil.
Thermal desorption technology has been employed successfully in the related contaminated site rehablitation project of following pollutant:Polycyclic aromatic hydrocarbon, its
His non-halogenated semi-volatile organic matter, benzene homologues, other non-halogenated volatile organic matter, organic agricultural chemicals and herbicides, other halogen
For semi-volatile organic matter, halo volatile organic matter, Polychlorinated biphenyls.It will be clear that thermal desorption technology is main suitable
It is half volatile and volatile organic pollution with scope, including polycyclic aromatic hydrocarbon, organic agricultural chemicals and insecticide, Polychlorinated biphenyls
Deng.
Traditional thermal desorption technology main technique is that contaminated soil enters dry kiln and rotary kiln, and through dual firing chamber's discharge
After flue gas enters waste heat boiler, it is vented directly to by hot steam caused by heat exchange among air, causes very big energy
Loss, it is specific as shown in figure 1, be currently used for the device of repairing polluted soil, generally comprise be sequentially communicated pretreatment unit 1,
Feed unit 2, burn unit 4 and dust processing unit 7；The front end being sequentially communicated is provided with the exhaust opening for burning unit 4
Cyclone dust collectors 6A-1, dual firing chamber 6B, heat transmission equipment 5B, rear end cyclone dust collectors 6A-2, half-dried reactor 6G, sack cleaner
6D and air-introduced machine 6E, burn caused flue gas in unit 4 and pass sequentially through the said equipment.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to a kind of device for repairing polluted soil is provided, with
While heat recovery is realized, secondary pollution problem caused by gas cleaning is avoided.
In order to solve the above-mentioned technical problem, technical scheme is as follows：A kind of device for repairing polluted soil,
Including burning unit, dual firing chamber, heat transmission equipment and the half-dried reactor being sequentially communicated are provided with the exhaust opening for burning unit；
Also include drying unit, drum machine and comminutor, the charging aperture for burning unit connects with the discharging opening of drying unit；It is described
The exhaust outlet of heat transmission equipment connects with the charging aperture of drum machine, and the hot gas outlet of drum machine and the air inlet of drying unit connect
Logical, the steam outlet of the drum machine connects with the steam air inlet of comminutor；The dust of the half-dried reactor bottom goes out
Mouth connects with the charging aperture of comminutor, and the discharging opening of comminutor connects with the charging aperture of drying unit.
The device of the present invention burns the discharge of unit exhaust opening when carrying the soil of contaminated site in handling background technology
Tail gas often contains a large amount of half volatiles and volatile organic contaminant, in dual firing chamber by adding the medicaments such as urea, igniting combustion
Burn to handle tail gas so that organic pollution is converted into innocuous substance so that sulfur-bearing material containing nitre changes into tail gas
Solid harmless object is enriched in dual firing chamber bottom, and in dual firing chamber, exhaust temperature after treatment becomes higher, and these tail gas pass through
During heat transmission equipment, exchanged heat with the water in heat transmission equipment, exhaust temperature reduces, and heat transmission equipment is exchanged come hot using high-temperature tail gas
Amount production hot steam；The present invention is separated after the exhaust outlet of heat transmission equipment sets drum machine, hot steam to enter drum machine
Into dry hot gas and vapor, drying unit and comminutor are respectively enterd, can be treated into the hot gas in drying unit
Processing contaminated soil is preheated, and is lifted the pending soil moisture and is reduced moisture content, reduces pending soil to a certain extent
The scale of construction of earth, burning the processing pressure of unit is reduced, and spark rate and time are reduced, and the dosage of the fuel such as fuel oil is reduced, from
And save soil remediation cost；In addition, the tail gas come out from heat transmission equipment, into half-dried reactor, harmful substance further by
The medicaments such as lime, activated carbon in half-dried reactor are adsorbed, and tail gas is further purified, now, the harmful pollution of a part
Dust is enriched in half-dried reactor bottom, and nuisance has been adsorbed in the Residuals such as taken out of out of dual firing chamber, half-dried reactor
The nuisance of itself in the lime of matter, activated carbon etc. and tail gas, directly discharge can produce secondary pollution, therefore, the present invention will
The pollution dust of enrichment is sent into comminutor in half-dried reactor, while vapor caused by drum machine is sent into comminutor and made
Grain, the pollution dust particle for being granulated acquisition put into drying unit again, carry out next round processing, with will in being handled in next round
Harmful substance removes, and produces secondary pollution during so as to avoid gas cleaning, preserves the ecological environment.In whole device running,
The dry hot gas that drying unit institute the mount of using heat can be isolated by drum machine completely provide, and water is by drum machine used in comminutor granulation
The vapor isolated provides, without consuming the extra energy and raw material thing, drying unit, comminutor and drum machine three collaboration
Effect, the dry hot gas and vapor for making full use of drum machine to isolate, after realizing tail gas waste heat itself and dual firing chamber's burning
Newly-increased heat makes full use of, and reduces soil remediation cost, meanwhile, the pollution dust of enrichment is granulated in double of dry reaction device
Reprocessing, solves the problems, such as secondary pollution caused by gas cleaning.
The drying unit includes being used to receive the hopper of material and is connected to the drying machine of feed hopper bottom, the drying machine
The discharging opening with comminutor, the hot gas outlet of drum machine connect respectively for charging aperture and steam air inlet.
The dry kiln and rotary kiln for burning unit and including being distributed up and down, the charging aperture and drying unit of the dry kiln
Discharging opening connection, the discharging opening of dry kiln connects with the charging aperture of rotary kiln.
Front end cyclone dust collectors, the front end cyclone dust removal are connected between the exhaust opening of the burning unit and dual firing chamber
The gas outlet of device connects with the air inlet of dual firing chamber, to carry out rough dusting to tail gas；The heat transmission equipment and half-dried reactor
Between be connected with rear end cyclone dust collectors, the gas outlet of rear end cyclone dust collectors connects with the air inlet of half-dried reactor, with right
Tail gas carries out further dedusting.
Also include dust processing unit, the front end cyclone dust collectors, dual firing chamber, rear end cyclone dust collectors bottom are enriched with
Dust is transported in dust processing unit by band shirt rim conveyer.
The dust processing unit includes being arranged at the pallet conveyer burned below unit discharging opening, pallet conveyer
Discharge end is provided with magnetic plant, to sub-elect magnetisable material.
Sack cleaner, the exhaust outlet connection of sack cleaner are connected with the sidepiece dust outlet of the half-dried reactor
There is air-introduced machine, wherein air-introduced machine can provide negative pressure to whole pipe-line system, be easy to flue gas effective flowing.
Also include pretreatment unit and feed unit, the feed end of the feed unit is arranged at pretreatment unit discharging opening
Lower section, the discharge end of feed unit connects with the charging aperture of drying unit.To carry out crushing and screening processing to pending soil,
And following functional element is sent into by feed unit.
Further, the condensation for being used for further being cooled to vapor is provided between the drum machine and comminutor
Device, to increase condensation effect.
Further, dry kiln and the rotary kiln dynamical system be preferably made up of variable-frequency motor, reductor, shaft coupling,
Gear shaft forms.The variable-frequency motor slows down through reductor, and the power connector gear set drive kiln exported by shaft coupling turns round.
Further, the conveying equipment in the dust processing unit is provided with what heat sink came out to reduce from rotary kiln
Temperature of charge.
Further, the whole process system should also include oil supply unit, water supplying unit, medicament addition list with equipment
Member etc..
Further, the steelframe of the unit design is connected with ground.
Further, above-mentioned all pipelines for being used to connect are high temperature resistant steel pipe.
Further, the heat transmission equipment is waste heat boiler, preferably forces waste heat boiler.
Energy large area of the invention is efficiently repaired to contaminated soil.Carried out by heat transmission equipment caused by heat exchange
Hot steam enters drum machine, isolates dry hot gas by drum machine and vapor respectively enters drying machine and comminutor,
Wherein dry hot gas preheat to pretreatment soil, and vapor enters with pollution dust caused by the enrichment of half-dried reactor
Comminutor, dust granulation is removed, drying machine is finally entered and processing is dried.By above technical measures, can save
Soil remediation cost, the operating efficiency of dry kiln is improved again, secondary pollution caused by gas cleaning can also be avoided, protect
Ecological environment, beneficial to popularization and application.
Relative to prior art, the present invention has the advantages that：
（1）Heat utilization ratio is high, and heat does not waste substantially caused by fuel combustion, and waste heat from tail gas is used for soil preheating, burns
Burning monoreactant consumption reduces, and effectively reduces contaminated soil remediation cost；
（2）The vapor and dry hot gas that drum machine is isolated all are fully utilized, and realize the multiple utilization of resource, enter
One step reduces processing cost；
（3）After the pollution dust of enrichment is by granulation in dry reactor, new round repair process is carried out, effectively avoids flue gas net
Secondary pollution during change, preserves the ecological environment.
Brief description of the drawings
Fig. 1 is the structural representation for the device for being currently used for repairing polluted soil.
Fig. 2 is the structural representation of the device for repairing polluted soil of the first embodiment of the invention.
Fig. 3 is the drying process schematic diagram of the drying unit of the first embodiment of the invention.
In figure：1- pretreatment units, 2- feed units, 3- drying units, 3A- hoppers, 3B- drying machines, 3C- are granulated
Machine, 4- burn unit, 4A- dry kilns, 4B-igniter, 4C-power unit, 4D-support roller group, 4E-rotary kiln, 4F-point
Firearm, 4G-power unit, 4H-support roller group, 5- UTILIZATION OF VESIDUAL HEAT INs unit, 5A- drums machine, 5B- heat transmission equipments, 6- gas cleanings
Unit, 6A-1- front ends cyclone dust collectors, 6A-2- rear ends cyclone dust collectors, 6B- dual firing chamber, 6C- igniters, the dry reactions of 6G- half
Device, 6D- sack cleaners, 6E- air-introduced machines, 6F- chimneys, 7- dust processing unit, 7A- magnetic plants, 7B- ironwares storage box,
7C- clean soils storage box, 7D- pallet conveyers and 7E- bands shirt rim conveyer.
Embodiment
In order to which those skilled in the art are better understood from the present invention, below with reference to accompanying drawing and in conjunction with the embodiments come make into
One step is described in detail.It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can
To be mutually combined.For sake of convenience, hereinafter as there are " on ", " under ", "left", "right" printed words, only represent with accompanying drawing in itself
Upper and lower, left and right direction is consistent, does not play restriction effect to structure.
Fig. 2 is the schematic diagram that the soil of the first embodiment of the invention is used for the device of repairing polluted soil.Specifically, use
In the device of repairing polluted soil, including pretreatment unit, feed unit, drying unit, burn unit, UTILIZATION OF VESIDUAL HEAT IN unit,
Gas cleaning unit and dust processing unit.Described pretreatment unit 1 is connected with feed unit 2；Described feed unit 2 with
Hopper 3A is connected, and described drying machine 3B is arranged in above dry kiln 4A, and the dry kiln 4A is arranged in above rotary kiln 4E, leads to
Steel frame construction is crossed with flange to be connected；Described pallet conveyer 7D and it is located at turn around kiln 4E, front end whirlwind with shirt rim conveyer 7E
Below deduster 6A-1, rear end cyclone dust collectors 6A-2 and dual firing chamber 6B, and rear end is provided with magnetic plant 7A；The front end rotation
Wind deduster 6A-1 air inlets connect with dry kiln 4A exhaust openings, and front end cyclone dust collectors 6A-1 gas outlet and dual firing chamber 6B enter
Gas port connects；The gas outlet of the dual firing chamber 6B connects with heat transmission equipment 5B air inlets；The heat transmission equipment 5B discharging openings are with after
The connection of cyclone dust collectors 6A-2 air inlets is held, the hot steam after heat exchange enters drum machine 5A, isolated by drum machine 5A dry
Scorching gas and vapor respectively enter drying machine 3B and comminutor 3C, and wherein dry hot gas carry out pre-add to pretreatment soil
Heat, vapor enter comminutor 3C；The rear end cyclone dust collectors 6A-2 gas outlets connect with half-dried reactor 6G air inlets, and half
The pollution dust of dry reaction device 6G bottoms by pipeline to comminutor 3C, with drum machine 5A caused by vapor mix,
Dust granulation is removed, drying machine 4A is finally entered and processing is dried；Described sack cleaner 6D air inlets with it is half-dried
Reactor 6G outlets tail end is connected；The air-introduced machine 6E air inlets connect with sack cleaner 6D gas outlets；The chimney 6F enters
Gas port connects with air-introduced machine 6E gas outlets, chimney 6F gas outlets tail connection air.
Contaminated soil need to be preselected by pretreatment unit 1 by the pretreatment such as sieving approach.
Pretreated contaminated soil is transported to drying unit 3 through feed unit 2.
The contaminated soil for entering drying machine 3B is preheated using from the dry hot gas that drum machine 5A is separated.
Soil pretreatment dry kiln 4A is arranged in above rotary kiln 4E, dry kiln 4A bottoms installation power unit 4C and support roller
Group 4D, is powered actuation mechanism, and can carry out reheating to contaminated soil in kiln equipped with igniter 4B；Return dry kiln 4E bottoms peace
Power unit 4G and support roller group 4H is filled, is powered actuation mechanism, and high temperature can be carried out to contaminated soil in kiln equipped with igniter 4F
Heating.The powered actuation mechanism is motor.
Drum machine 5A is connected with heat transmission equipment 5B, and carrying out hot steam caused by heat exchange by heat transmission equipment 5B enters
Drum machine 5A, dry hot gas are isolated by drum machine 5A and vapor respectively enters drying machine 3B and comminutor 3C, wherein
Dry hot gas are preheated to pretreatment soil, and vapor enters with pollution dust caused by half-dried reactor 6G enrichments to be made
Grain machine 3C, dust granulation is removed, drying machine 3B is finally entered and processing is dried.Heat transmission equipment 5B is pressure waste heat pot
Stove.
The flue gas for exchanging heat out from heat transmission equipment 5B enters cyclone dust collectors 6A-2, enters back into dual firing chamber 6B, then enter
Enter to half-dried reactor 6G, enter back into sack cleaner 6D, enter back into air-introduced machine 6E and chimney 6F, wherein 6E pairs of air-introduced machine
Whole piping unit provides negative pressure, is easy to flue gas effective flowing.
Come out from time dry kiln 4E, front end cyclone dust collectors 6A-1, rear end cyclone dust collectors 6A-2 and dual firing chamber 6B clean
Soil is respectively delivered to ironware storage box 7B by pallet conveyer 7D after magnetic plant 7A sortings and with shirt rim conveyer 7E
Deposited with clean soil storage box 7C.
The operation principle of the present invention is as follows：After dry kiln 4A and rotary kiln 4E power unit 4C, power unit 4G work,
After the preprocessed unit 1 of contaminated soil is handled, hopper 3A is transported to by feed unit 2 and preheated into drying machine 3B, preheated
Contaminated soil afterwards enters dry kiln 4A, and igniting unit 4B igniting is preheated again to contaminated soil, the Polluted Soil of heating
Earth enters rotary kiln 4E, and igniting unit 4F igniting is fully heated to contaminated soil, and the gas of volatilization is through gas cleaning unit 6
In air-introduced machine 6E caused by negative pressure flow backwards and enter dedusting in the cyclone dust collectors 6A-1 of front end through dry kiln 4A, tail gas enters two
Igniting unit 6C igniting is heated after firing room, and adds medicament and air progress desulphurization denitration processing, and the tail gas after processing, which enters, to be changed
Hot equipment 5B, drum machine 5A is entered by hot steam caused by heat transmission equipment 5B progress heat exchanges, divided by drum machine 5A
Separate out dry hot gas and vapor respectively enters drying machine 3B and comminutor 3C, wherein dry hot gas enter to pretreatment soil
Row preheating, vapor enter comminutor 3C with pollution dust caused by half-dried reactor 6G enrichments, are removed dust granulation,
Finally enter drying machine 3B and processing is dried.By above technical measures, soil remediation cost can be saved, improves drying again
The operating efficiency of kiln, secondary pollution caused by gas cleaning can also be avoided, protects ecological environment, beneficial to popularization and application.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, without
For limiting the scope of the present invention, after the present invention has been read, the various equivalent form of values of the those skilled in the art to the present invention
Modification each fall within the application appended claims limited range.
Claims (10)
1. a kind of device for repairing polluted soil, including burn unit（4）, the burning unit（4）Exhaust opening at set
There is the dual firing chamber being sequentially communicated（6B）, heat transmission equipment（5B）With half-dried reactor（6G）；Characterized in that, also include drying unit
（3）, drum machine（5）And comminutor（3C）, the burning unit（4）Charging aperture and drying unit（3）Discharging opening connection；Institute
State heat transmission equipment（5B）Exhaust outlet and drum machine（5）Charging aperture connection, drum machine（5）Hot gas outlet and drying unit
（3）Air inlet connection；The drum machine（5）Steam outlet and comminutor（3C）The connection of steam air inlet, described half
Dry reaction device（6G）The dust outlet and comminutor of bottom（3C）Charging aperture connection, comminutor（3C）Discharging opening it is single with drying
Member（3）Charging aperture connection.
2. the device according to claim 1 for repairing polluted soil, it is characterised in that the drying unit（3）Bag
Include the hopper for receiving material（3A）Be connected to hopper（3A）The drying machine of bottom（3B）, the drying machine（3B）Charging aperture
With steam air inlet respectively with comminutor（3C）Discharging opening, drum machine（5A）Hot gas outlet connection.
3. the device according to claim 1 for repairing polluted soil, it is characterised in that the burning unit includes upper
The dry kiln of lower distribution（4A）And rotary kiln（4E）, the dry kiln（4A）Charging aperture connected with the discharging opening of drying unit,
Dry kiln（4A）Discharging opening and rotary kiln（4E）Charging aperture connection.
4. the device according to claim 1 for repairing polluted soil, it is characterised in that the burning unit（4）'s
Exhaust opening and dual firing chamber（6B）Between be connected with front end cyclone dust collectors（6A-1）, the front end cyclone dust collectors（6A-1）Go out
Gas port and dual firing chamber（6B）Air inlet connection；The heat transmission equipment（5B）With half-dried reactor（6G）Between be connected with rear end rotation
Wind deduster（6A-2）, rear end cyclone dust collectors（6A-2）Gas outlet and half-dried reactor（6G）Air inlet connection.
5. the device according to claim 1 for repairing polluted soil, it is characterised in that also including dust processing unit
（7）, the front end cyclone dust collectors（6A-1）, dual firing chamber（6B）, rear end cyclone dust collectors（6A-2）The dust of bottom enrichment leads to
Cross band shirt rim conveyer（7E）It is transported to dust processing unit（7）It is interior.
6. the device according to claim 5 for repairing polluted soil, it is characterised in that the dust processing unit
（7）Including being arranged at burning unit（4）Pallet conveyer below discharging opening（7D）, pallet conveyer（7D）Discharge end be provided with
Magnetic plant（7A）.
7. the device according to claim 1 for repairing polluted soil, it is characterised in that the half-dried reactor（6C）
Sidepiece dust outlet at be connected with sack cleaner（6D）, sack cleaner（6D）Exhaust outlet be connected with air-introduced machine（6E）.
8. according to the device for repairing polluted soil described in claim any one of 1-7, it is characterised in that also include pre- place
Manage unit（1）And feed unit（2）, the feed unit（2）Feed end be arranged at pretreatment unit（1）Under discharging opening
Side, feed unit（2）Discharge end and drying unit（3）Charging aperture connection.
9. according to the device for repairing polluted soil described in claim any one of 1-7, it is characterised in that the drum machine
The condenser for being used for further being cooled to vapor is provided between comminutor.
10. according to the device for repairing polluted soil described in claim any one of 1-7, it is characterised in that the heat exchange
Equipment（5B）For waste heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981626.9A CN107639110B (en) | 2017-10-20 | 2017-10-20 | Device for repairing contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981626.9A CN107639110B (en) | 2017-10-20 | 2017-10-20 | Device for repairing contaminated soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107639110A true CN107639110A (en) | 2018-01-30 |
| CN107639110B CN107639110B (en) | 2020-10-23 |
Family
ID=61124543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710981626.9A Active CN107639110B (en) | 2017-10-20 | 2017-10-20 | Device for repairing contaminated soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107639110B (en) |
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| CN113894150A (en) * | 2021-09-03 | 2022-01-07 | 广西博世科环保科技股份有限公司 | Energy-saving efficient thermal desorption remediation method for organic contaminated soil |
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| Publication number | Publication date |
|---|---|
| CN107639110B (en) | 2020-10-23 |
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