CN202539179U - System for drying contaminated soil polluted by persistent organic pollutants through waste heat of flue gas - Google Patents
System for drying contaminated soil polluted by persistent organic pollutants through waste heat of flue gas Download PDFInfo
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- CN202539179U CN202539179U CN2012201457576U CN201220145757U CN202539179U CN 202539179 U CN202539179 U CN 202539179U CN 2012201457576 U CN2012201457576 U CN 2012201457576U CN 201220145757 U CN201220145757 U CN 201220145757U CN 202539179 U CN202539179 U CN 202539179U
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Abstract
The utility model relates to a contaminated soil treatment technology, and aims to provide a system for drying contaminated soil polluted by persistent organic pollutants through waste heat of flue gas. The system comprises a self-cleaning-type paddle dryer, a heat-transfer oil pump and a heat exchanger, wherein an air extraction port is formed on the upper side of a shell of the self-cleaning-type paddle dryer and is connected with a dust remover; a lower outlet of the dust remover is connected with a feeding machine; an upper outlet of the dust remover is connected with a spraying tower; the spraying tower is connected with a draught fan; the draught fan is connected with an exhaust funnel; the heat exchanger is placed in a flue gas channel at the tail part of another independent heat desorption device; and tail gas discharged from the heat desorption device is taken as a heat exchange medium. The system integrates soil drying and tail gas treatment, and the tail gas of the independent heat desorption device is taken as a heat source for heat transfer oil to a drying machine, so that the system is easy to construct and mount on site; the low-grade heat source is fully utilized, the energy source consumption in the soil drying process is reduced, and the energy source is saved; and the whole system has a compact structure, is small in occupied area and high in drying speed, and can continuously work.
Description
Technical field
The utility model relates to a kind of persistence organic pollutant contaminated soil treatment and disposal equipment.In particular, the utility model relates to the system of the dry persistence organic pollutant contaminated soil of a kind of fume afterheat.
Background technology
Along with economic development and public's environmental consciousness improve, after particularly Convention of Stockholm was signed, (Persistent Organic Pollutants, the pollution that POPs) causes had received great attention to persistence organic pollutant.Because historical reasons, the current pollution that has a large amount of soils to receive persistence organic pollutant of China is like Polychlorinated biphenyls and multiple agrochemical.The Polychlorinated biphenyls that uses with power industry is example, because the treatment technology restriction, a large amount of Polychlorinated biphenyls refuses that contain are sealed up for safekeeping in all kinds of storing spot.Many storing spot have have met or exceeded its design period, and Polychlorinated biphenyls has leaked in the environment, cause serious soil pollution, become environment hidden danger.For contaminated soil, press for and take control measures, prevent to pollute further expansion and increase the weight of.
The thermal desorption technology is the current technology that the persistence organic pollutant contaminated site is repaired that is widely used in most.External thermal desorption technical research exploitation has early currently developed many generation techniques and has developed multi-form thermal desorption device.And the current thermal desorption practical applications of still not having scale of China.In the thermal desorption process, for guaranteeing that persistent organism is removed thoroughly in the soil, need soil is heated to higher temperature, the discharged flue gas temperature is very high, and like direct discharging, this part heat is underutilized.No matter be low-temperature heat desorption or elevated temperature heat desorption; All need carry out certain preliminary treatment to contaminated soil; Moisture in the soil is reduced to a certain degree; Be than granule with soil breaking simultaneously,, alleviate Air Pollution Control Office reason load of utility behind the thermal desorption to reduce energy resource consumption and to promote that thermal desorption carries out.
According to the structure of persistence organic pollutant contaminated soil character and thermal desorption device, the utility model provides a kind of persistence organic pollutant contaminated soil treatment and disposal equipment, i.e. the system of the dry persistence organic pollutant contaminated soil of fume afterheat.Literature search shows, the similar content report of current nothing and this patent.
The utility model content
The technical problem that the utility model will solve is, overcomes deficiency of the prior art, to persistence organic pollutant contaminated soil character, the system of the dry persistence organic pollutant contaminated soil of a kind of fume afterheat is provided.
Be the technical solution problem, the solution of the utility model is:
The system of the dry persistence organic pollutant contaminated soil of a kind of fume afterheat is provided, comprises the soil desiccation parts, it is characterized in that, also comprise the vent gas treatment parts; Said soil desiccation parts comprise batcher, self-cleaning type blade dryer, Heat-transfer Oil Pump and heat exchanger, and said vent gas treatment parts comprise deduster, spray column, air-introduced machine and aiutage.
Said self-cleaning type blade dryer has cylindrical housings, and enclosure interior is provided with the hollow hot box that connects transmission mechanism, and the two ends of hollow hot box are provided with heat conductive oil inlet and the conduction oil outlet that connects heat exchanger respectively; Some groups of blades are set on the hollow hot box, and blade is double-blade tilted distribution; Establish a self-cleaning type scraping article between per two groups of blades, the two ends of self-cleaning type scraping article are fixed on the inwall of drying machine housing, and the center is and the corresponding domes of hollow hot box external diameter, and does not contact mutually with hollow hot box; The top of said housing one end is provided with the wet soil earth charging aperture of external batcher, and the bottom of the other end is provided with dry ground earth discharging opening; The outside of housing is provided with the chuck layer, and outlet all is connected heat exchanger through pipeline to the heat conductive oil inlet at chuck layer two ends with conduction oil, on the Heat-transfer Oil Pump pipeline located therein;
Housing upside at said self-cleaning type blade dryer is provided with bleeding point, and bleeding point connects deduster, and the following outlet of deduster is connected to said batcher; The upper outlet of deduster connects spray column, and spray column connects air-introduced machine, and air-introduced machine connects aiutage;
Said heat exchanger places in the exhaust gases passes of thermal desorption device afterbody independently, and with thermal desorption device discharge tail gas as heat transferring medium.
The thermal desorption device is the another one self-contained unit; Comprise building blocks such as soil batcher, thermal desorption device, exhaust gas processing device and exhaust gases passes; Its annexation connects the thermal desorption device for the soil batcher, and the thermal desorption device connects exhaust gas processing device, and exhaust gas processing device connects exhaust gases passes.The thermal desorption device is used for the dried soil of the utility model is heated to 350～650 ℃ (heating-up temperature is by the decisions of persistence organic pollutant kind), and with the persistent organism in the thorough removal soil, this process will produce the flue gas of high temperature.The utility model utilizes the high-temperature flue gas of thermal desorption device discharge as thermal source, has improved the whole utilization ratio of energy.The utility model can be considered a kind of pretreatment unit of thermal desorption device.
As a kind of improvement, said self-cleaning type scraping article is arranged perpendicular to hollow hot box.
As a kind of improvement, said hollow hot box is 1.
As a kind of improvement, the quantity of said each group blade is 2, and is the decentralized layout that angle is 60 degree between every group of blade.
As a kind of improvement, said blade is a straight board lath shape, and vertically is installed on the hollow hot box.
As a kind of improvement, the angle of the cross section of said blade and hollow hot box center line is 45 degree.
As a kind of improvement, said deduster is cyclone dust collectors.
As a kind of improvement, said spray column is a packed tower.
In the utility model, the persistence organic pollutant contaminated soil gets into the self-cleaning type blade dryer from wet soil earth charging aperture.Conduction oil flows in dryer outer chuck layer and hollow hot box.Hollow hot box rotates with constant speed, and driving soil is blade and the heating of cavity wall when inside cavity is advanced, and is fractured into than granule.Dried soil is discharged through dry ground earth discharging opening.Water in the soil evaporates, and gets into cyclone dust collectors and spray column through bleeding point, finally discharges through aiutage.Conduction oil is imported and exported and all to be connected heat exchanger, and heat exchanger places independently in the thermal desorption device tail flue gas passage.The system of the dry persistence organic pollutant contaminated soil of the fume afterheat of the utility model; Make full use of low-grade heat sources such as fume afterheat, simple in structure, energy consumption is low, persistence organic pollutant does not have diffusion; Do not produce secondary pollution, reduce soil thermal desorption plant energy consumption more than 20%.
The system of the dry persistence organic pollutant contaminated soil of the fume afterheat of the utility model integrates soil desiccation and vent gas treatment, and its beneficial effect is:
1) adopts independently thermal desorption device tail flue gas as the thermal source of desiccation machine conduction oil, be easy to site operation and install, made full use of low-grade heat source, lowered the energy resource consumption in the antecedent soil moisture process, energy savings.
2) adopt the self-cleaning type blade dryer, the whole system compact conformation takes up an area of for a short time, and rate of drying is fast, continuously-running.
3) utilize the self-cleaning type scraping article to solve the sticking wall problem of mud, realize the dry and broken of soil simultaneously, help thereafter the thermal desorption process and carry out.
4) with the conduction oil be heat transfer medium, homogeneous heating, heat transfer efficiency is high, and heating-up temperature is controlled easily.
5) heating-up temperature is lower, prevents that persistence organic pollutant from volatilizing in soil heating process, and the vent gas treatment facility can effectively be controlled the persistence organic pollutant in the dry flue gas.
Description of drawings
Fig. 1 is system process figure;
Fig. 2 is the drying machine cross-sectional view;
Fig. 3 is a drying machine paddle three-dimensional structure diagram;
Fig. 4 is the axial stereogram of drying machine paddle;
Fig. 5 is a drying machine paddle end perspective view;
Among the figure: 1. batcher, 2. wet soil earth charging aperture, 3. blade, 4. bleeding point, 5. self-cleaning type scraping article; 6. conduction oil outlet, 7. heat conductive oil inlet, 8. transmission device, 9. heat conductive oil inlet, 10. chuck layer; 11. hollow hot box, 12. dry ground earth discharging openings, the outlet of 13. conduction oils, 14. Heat-transfer Oil Pump, 15. heat exchangers; 16. cyclone dust collectors, 17. spray columns, 18. air-introduced machines, 19. aiutages.
The specific embodiment
With reference to accompanying drawing, will combine embodiment that the utility model is described in detail below.
Fig. 1 provides the process chart of the system of the dry persistence organic pollutant contaminated soil of fume afterheat, is made up of soil desiccation parts and vent gas treatment parts.
The soil desiccation parts comprise batcher 1, self-cleaning type blade dryer, Heat-transfer Oil Pump 14, heat exchanger 14, and the vent gas treatment parts comprise deduster 16, spray column 17, air-introduced machine 18, aiutage 19; Batcher connects the self-cleaning type blade dryer; Hollow hot box 11 is installed in the cylindrical housings inside of self-cleaning type blade dryer, on the hollow hot box 11 some groups of blades 3 is set, and blade 3 is double-blade tilted distribution; Establish self-cleaning type scraping article 5 between per two groups of blades 3, realize the self-purification ability of blade 3; The two ends of hollow hot box 11 connect heat conductive oil inlet 7 and conduction oil outlet 13 respectively; The circular cylindrical shell external is a chuck layer 10, and its two ends are provided with heat conductive oil inlet 9 and conduction oil outlet 6.Housing top is provided with wet soil earth charging aperture 2, and the bottom is provided with dry ground earth discharging opening 12; The conduction oil of hollow hot box 11 and chuck layer 10 is imported and exported and all is connected heat exchanger 15 through pipeline, on Heat-transfer Oil Pump 14 pipelines located therein.The circular cylindrical shell external is provided with bleeding point 4, and bleeding point 4 connects deduster 16, and 16 times outlets of deduster connect batcher 1, and cyclone dust collectors 16 upper outlets connect spray column 17, and spray column 17 connects air-introduced machine 18, and air-introduced machine 18 connects aiutage 19.
The persistence organic pollutant contaminated soil gets into the self-cleaning type blade dryer from wet soil earth charging aperture 2.Conduction oil flows in dryer outer chuck layer 10 and hollow hot box 11.Hollow hot box 11 rotates with constant speed.Internal cavity soil filling rate is 0.3～0.7, and hollow hot box 11 rotates, and drives blade 3 motions, and contaminated soil is blade 3 and the heating of cavity wall when inside cavity is advanced.Because the effect of bleeding, inside cavity air pressure reduces, and water boiling point reduces.Contaminated soil is heated to 110-130 ℃, and is broken into than granule by blade 3 and self-cleaning type scraping article 5.Water is evaporated in the contaminated soil, gets into deduster 16 and removes a small amount of grit in the gas through bleeding point 4.The grit that deduster 16 captures is delivered to batcher 1 again.Gas after the dedusting gets into spray column 17, and with the steam condensation, a small amount of on-condensible gas is discharged through aiutage 19 through water spray.In the contaminated soil dry run, because of heating-up temperature is lower, persistent organism does not evaporate basically in the soil, and soil moisture content is reduced to setting value after the mummification.
The cross section of hollow hot box upper straight-plate bar shaped blade 3 and hot box center line angle are 45 degree (Fig. 5), and the blade 3 tilting contaminated soils that make can move to the discharging direction under blade 3 promotes; Blade 3 becomes 60 degree angles each other, whenever at a distance from 2 blades a self-cleaning type scraping article 5 is set.Self-cleaning type scraping article 5 can stop soil in drying process, to cohere on the blade of axis and blade 3, prevents fouling and the mechanical failure that causes thereof, simultaneously can disposable realization contaminated soil dry and broken.Dried soil is discharged through dry ground earth discharging opening 12.
At last, what note also is that what more than to enumerate only is a specific embodiment of the utility model.Obviously, this is bright to be not limited to above embodiment, and a lot of distortion can also be arranged.Those of ordinary skill in the art can all should think the protection domain of the utility model from all distortion that the disclosed content of the utility model directly derives or association goes out.
Claims (8)
1. the system of the dry persistence organic pollutant contaminated soil of fume afterheat comprises the soil desiccation parts, it is characterized in that, also comprises the vent gas treatment parts; Said soil desiccation parts comprise batcher, self-cleaning type blade dryer, Heat-transfer Oil Pump and heat exchanger, and said vent gas treatment parts comprise deduster, spray column, air-introduced machine and aiutage;
Said self-cleaning type blade dryer has cylindrical housings, and enclosure interior is provided with the hollow hot box that connects transmission mechanism, and the two ends of hollow hot box are provided with heat conductive oil inlet and the conduction oil outlet that connects heat exchanger respectively; Some groups of blades are set on the hollow hot box, and blade is double-blade tilted distribution; Establish a self-cleaning type scraping article between per two groups of blades, the two ends of self-cleaning type scraping article are fixed on the inwall of drying machine housing, and the center is and the corresponding domes of hollow hot box external diameter, and does not contact mutually with hollow hot box; The top of said housing one end is provided with the wet soil earth charging aperture of external batcher, and the bottom of the other end is provided with dry ground earth discharging opening; The outside of housing is provided with the chuck layer, and outlet all is connected heat exchanger through pipeline to the heat conductive oil inlet at chuck layer two ends with conduction oil, on the Heat-transfer Oil Pump pipeline located therein;
Housing upside at said self-cleaning type blade dryer is provided with bleeding point, and bleeding point connects deduster, and the following outlet of deduster is connected to said batcher; The upper outlet of deduster connects spray column, and spray column connects air-introduced machine, and air-introduced machine connects aiutage;
Said heat exchanger places another independently in the thermal desorption device tail flue gas passage, and with thermal desorption device discharge tail gas as heat transferring medium.
2. system according to claim 1 is characterized in that, said self-cleaning type scraping article is arranged perpendicular to hollow hot box.
3. system according to claim 1 is characterized in that, said hollow hot box is 1.
4. system according to claim 1 is characterized in that, the quantity of said each group blade is 2, and is the decentralized layout that angle is 60 degree between every group of blade.
5. system according to claim 1 is characterized in that, said blade is a straight board lath shape, and vertically is installed on the hollow hot box.
6. system according to claim 1 is characterized in that, the angle of the cross section of said blade and hollow hot box center line is 45 degree.
7. system according to claim 1 is characterized in that, said deduster is cyclone dust collectors.
8. system according to claim 1 is characterized in that, said spray column is a packed tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201457576U CN202539179U (en) | 2012-04-09 | 2012-04-09 | System for drying contaminated soil polluted by persistent organic pollutants through waste heat of flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201457576U CN202539179U (en) | 2012-04-09 | 2012-04-09 | System for drying contaminated soil polluted by persistent organic pollutants through waste heat of flue gas |
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| CN202539179U true CN202539179U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201457576U Withdrawn - After Issue CN202539179U (en) | 2012-04-09 | 2012-04-09 | System for drying contaminated soil polluted by persistent organic pollutants through waste heat of flue gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615097A (en) * | 2012-04-09 | 2012-08-01 | 浙江大学 | System for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat |
| CN105750319A (en) * | 2016-03-21 | 2016-07-13 | 浙江机电职业技术学院 | Energy-saving soil contamination thermal desorption device |
| CN106694538A (en) * | 2017-01-04 | 2017-05-24 | 浙江博世华环保科技有限公司 | System and method for repairing organic contaminated soil through sludge microwave gasification residues in targeting mode |
| CN106734152A (en) * | 2017-01-11 | 2017-05-31 | 中冶赛迪工程技术股份有限公司 | A kind of method and apparatus of the utilization thermal desorption discharging predrying contaminated soil of waste heat |
| CN108326028A (en) * | 2018-02-13 | 2018-07-27 | 浙江宜可欧环保科技有限公司 | The anhydrous spray process method of pyrolysis gas in pyrolysis device and pyrolysis device without water spray |
-
2012
- 2012-04-09 CN CN2012201457576U patent/CN202539179U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615097A (en) * | 2012-04-09 | 2012-08-01 | 浙江大学 | System for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat |
| CN102615097B (en) * | 2012-04-09 | 2013-06-19 | 浙江大学 | System for drying persistent organic pollutants polluted soil through flue gas waste heat |
| CN105750319A (en) * | 2016-03-21 | 2016-07-13 | 浙江机电职业技术学院 | Energy-saving soil contamination thermal desorption device |
| CN105750319B (en) * | 2016-03-21 | 2018-10-23 | 浙江机电职业技术学院 | A kind of energy-saving soil pollution thermal desorption device |
| CN106694538A (en) * | 2017-01-04 | 2017-05-24 | 浙江博世华环保科技有限公司 | System and method for repairing organic contaminated soil through sludge microwave gasification residues in targeting mode |
| CN106694538B (en) * | 2017-01-04 | 2022-08-30 | 浙江博世华环保科技有限公司 | System and method for targeted remediation of organic contaminated soil by sludge microwave gasification residues |
| CN106734152A (en) * | 2017-01-11 | 2017-05-31 | 中冶赛迪工程技术股份有限公司 | A kind of method and apparatus of the utilization thermal desorption discharging predrying contaminated soil of waste heat |
| CN108326028A (en) * | 2018-02-13 | 2018-07-27 | 浙江宜可欧环保科技有限公司 | The anhydrous spray process method of pyrolysis gas in pyrolysis device and pyrolysis device without water spray |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121121 Effective date of abandoning: 20130619 |
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| RGAV | Abandon patent right to avoid regrant |