CN104646409A - Two-section type rotary kiln indirect heat desorption device - Google Patents
Two-section type rotary kiln indirect heat desorption device Download PDFInfo
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- CN104646409A CN104646409A CN201510053096.2A CN201510053096A CN104646409A CN 104646409 A CN104646409 A CN 104646409A CN 201510053096 A CN201510053096 A CN 201510053096A CN 104646409 A CN104646409 A CN 104646409A
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Abstract
The invention relates to the field of environmental friendliness and aims at providing a two-section type rotary kiln indirect heat desorption device which is used for repairing organic polluted soil or mercury polluted soil. The device comprises an upper skid and a lower skid, wherein the upper skid and the lower skid are provided with indirect heating rotary kilns. The upper skid comprises a feeding hopper, a feeding air locking device, an upper-layer rotary kiln drying chamber, an air blower and an air pre-heater; and the lower skid comprises a burner group, a low-layer rotary kiln thermal desorption chamber, a discharging hopper and a discharging air locking device. The two-section type rotary kiln indirect heat desorption device is particularly suitable for repairing organic matter polluted fields or mercury-containing polluted fields; the skid has a small volume and is convenient to transport and mount; the treatment capability is great, and modularized development can be realized; and the heat efficiency is high, and the pollutant removing rate of more than 99.9% can be realized.
Description
Technical field
The present invention relates to a set of two-part rotary kiln indirect thermal desorption apparatus, by indirect in upper and lower layer rotary kiln, the desorption of contaminants in organic polluted soil or mercury contaminated soil is separated, belong to field of Environment Protection.
Background technology
Soil is one of the mankind's important natural resources of depending on for existence, is also the important component part of human ecological environment.Along with social technology expanding economy, improving constantly of people's living standard, the general level of the health, having higher requirement to realizing green environment, curbing environmental pollution and also becoming the important topic of urban construction.Along with the adjustment of the industrial structure; originally the industrial enterprise being in main city zone in many cities closes down or resettlement; leave over lower a large amount of high pollution soil; comprise a large amount of organic polluted soil; ambient atmosphere and water can be polluteed; to people's life, healthy produce harmful effect, these places of being polluted have to pass through soil remediation could drop into new purposes, therefore to have contaminated soil to carry out important content that repairing and treating becomes environmental protection.
Soil remediation is international difficult point and hot research problem always, more domestic colleges and universities of China and scientific research department have recognized demand, policy guidance that country is following, predict the huge space of Mirae Corp.'s development, so done related work on the field such as technology and management.
For the reparation of organic polluted soil or mercury contaminated soil, thermal desorption technology is one of main contaminated soil remediation technology, this technology is with direct or indirect heat exchange heating, and the temperature making pollution components in soil reach enough makes it evaporate and the process be separated with Soil mediation.Pollution components after separation is further processed by modes such as burning, absorption or chemical reactions again.Heat transferring medium in thermal desorption device is generally air, combustion product gases, inert gas, high-temperature steam, conduction oil or fused salt etc., and thermal desorption process is the physical process that in soil, pollution components enters gas phase from solid phase or liquid phase heat trnasfer.
The patent No. a kind of dystopy thermal desorption processing method relating to contaminated soil that has been the disclosure of the invention of 201310126280.6, contaminated soil is carried out sieve, broken, beat heap, contaminated soil mound thickness is even, the underlying plenum chamber of contaminated soil, contaminated soil sealed thermal insulating layer covers, and above sealed thermal insulating layer coverage rate, being provided with extracting supervisor, parallel pipeline place is provided with switch valve.Its objective is in order to heat treatment technics energy resource consumption in contaminated solution soil remediation regenerative process is high and the problem of waste and the invention that designs.
The patent No. a kind of contaminated soil electromagnetic thermal desorption system that has been the disclosure of the invention of 201310273648.1.This system comprises cylinder type electromagnetic thermal desorptor, electromagnetic heating control system, drum rotation speed control system, heat exchanger and exhaust gas purification system.Its objective is and ensure that the organic pollution volatilized from contaminated soil is taken out of cylinder type electromagnetic thermal desorptor in time, pass through the exhaust temperature carrying out heat exchange with cold air will decline, entered the wet scrubber in exhaust gas purification system by offgas outlet by the road, enter active carbon adsorber afterwards.
The patent No. a kind of thermal desorption device for repairing mercury contaminated soil that has been the disclosure of the invention of 201410316308.7.This device comprises feed system, rotary kiln heating system, dust pelletizing system, cooling condenser system, tail gas filtering system, gas blow-off system, condensate collection system, sedimentation and filtration system, soil cooling system and discharge system.This invention aims at mercury contaminated soil and designs, thus repairs by mercury institute contaminated soil.
Above three patents are the part of technically carrying out at existing thermal desorption and improve, although patent 201310126280.6 partly can reduce energy consumption due to material and not stir, repairing efficiency is long, partly repair shortcoming not in place; Patent 201310273648.1 adopts secondary energy sources electricity to heat as the energy, has the shortcoming of cost of disposal high and cylinder sealing difficulty; Patent 201410316308.7 adopts rotary kiln as main thermal desorption equipment, but adopts directly heating to need tail gas after-treatment, and equipment is complicated, bulky, has the shortcoming that operating cost is high, there is secondary pollution hidden danger.
Summary of the invention
The present invention seeks to overcome prior art deficiency, provide a kind of two-part rotary kiln indirect thermal desorption apparatus for organic polluted soil or mercury contaminated soil, sledge assembling structure can convenient transport and installation; Continuous feed disposal ability is large, can modularization expand; Indirect in levels rotary kiln, non-secondary pollution and the thermal efficiency is high, pollutants removal rate is more than 99.9%.
In order to achieve the above object, the technical solution used in the present invention is: provide a kind of two-part rotary kiln indirect thermal desorption apparatus for organic polluted soil and mercury contaminated soil, comprises sledge and lower sledge composition.Upper sledge comprises feed hopper, charging flapper, rotary kiln drying room, upper strata, air blast and air preheater; Lower sledge comprises burner group, rotary kiln pyrogenation suction-chamber of lower floor, discharge bucket and discharging flapper.
Rotary kiln drying room, upper strata is connected with rotary kiln pyrogenation suction-chamber of lower floor, and upper strata flue gas chuck is connected with lower floor flue gas chuck.In flue gas chuck, flow of flue gas direction is contrary with the direction of motion of the indoor soil of thermal desorption.
The invention provides the method utilizing said apparatus to realize organic polluted soil or mercury contaminated soil reparation, comprise the following steps: 1. natural gas, diesel oil or biomass fuel equal energy source burn in burner group, produce the high-temperature flue gas of 800 ~ 1200 DEG C, enter lower floor's flue gas chuck, flue gas heating rotary kiln barrel thus indirect material in chuck.
2. material be preheated in rotary kiln drying indoor, upper strata, dry, contained moisture is evaporated.Enter rotary kiln pyrogenation suction-chamber of lower floor be further heated 200 ~ 650 DEG C through preheating, dried material, contained organic matter or mercury are heated to boiling point and separate in vapour form.
3. after the process of rotary kiln pyrogenation suction-chamber of lower floor, the organic matter of more than 99.9% or mercury are desorbed to be separated, and clean material enters discharge bucket and discharges through the laggard step decreasing temperature and increasing humidity of discharging flapper.After flue gas leaves upper strata flue gas chuck, enter air preheater and carry out preheating to burner group combustion air used and realize waste heat recovery simultaneously, the flue gas after cooling directly discharges.
4. discharge after exhaust gas processing device process is qualified from the steam of upper and lower layer rotary kiln moisture and pollutant out.
The present invention can continuous feed, adopts upper and lower two sled to design, and volume is little, be convenient to transport and can according to the dilatation of disposal capacity Fast Modular blocking.Flue gas and soil reverse movement, and have employed air preheater Mist heat recovering, thermal source utilization rate is high.Adopt levels rotary kiln indirect heating apparatus, the flue gas of discharge is that the tail gas that combustion fuel produces can without the need to disposing direct discharge.Be equipped with lifting blade or iron chains in kiln, mixing of materials is strong, and the thermal efficiency is high, is applicable to various contaminated soil of different nature.For organic polluted soil or mercury contaminated soil, this device can realize the removal efficiency of more than 99.9%, and operating cost is low.
Accompanying drawing explanation
Accompanying drawing is process flow diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
For a two-part rotary kiln indirect thermal desorption apparatus for organic polluted soil and mercury contaminated soil, comprise sledge and lower sledge composition.Upper sledge comprises feed hopper and charging flapper, rotary kiln drying room, upper strata, air blast and air preheater; Lower sledge comprises burner group, rotary kiln pyrogenation suction-chamber of lower floor, discharge bucket and discharging flapper.
Rotary kiln drying room, upper strata is connected with rotary kiln pyrogenation suction-chamber of lower floor, and upper strata flue gas chuck is connected with lower floor flue gas chuck.
Natural gas, diesel oil or biomass fuel equal energy source, in the burning of burner group, produce the high-temperature flue gas of 800 ~ 1200 DEG C, enter lower floor's flue gas chuck, flue gas heating rotary kiln barrel thus indirect material in chuck.
Contaminated soil with fixed rate continous-stable through feed hopper, enter rotary kiln drying room, upper strata by material after charging flapper, advance under the rotation of rotary kiln.Contaminated soil is preheated in rotary kiln drying indoor, upper strata, drying, and contained moisture is evaporated.Enter rotary kiln pyrogenation suction-chamber of lower floor be further heated 200 ~ 650 DEG C through preheating, dried material, contained organic matter or mercury are heated to boiling point and separate in vapour form.
After the process of rotary kiln pyrogenation suction-chamber of lower floor, the organic matter of more than 99.9% or mercury are desorbed to be separated, and clean material enters discharge bucket and carry out decreasing temperature and increasing humidity discharge after discharging flapper.After flue gas leaves upper strata flue gas chuck, enter air preheater and the burner group air used that burns is carried out to preheating and realizes waste heat recovery simultaneously, the flue gas after cooling directly discharges.
Discharge after exhaust gas processing device process is qualified from the steam of upper and lower layer rotary kiln moisture and pollutant out.
The present invention can continuous feed, adopts upper and lower two sled to design, and volume is little, be convenient to transport and can according to the dilatation of disposal capacity Fast Modular blocking.Flue gas and soil reverse movement, and have employed air preheater Mist heat recovering, thermal source utilization rate is high.In employing, lower floor's rotary kiln indirect heating apparatus, the flue gas of discharge is that the tail gas that combustion fuel produces can without the need to disposing direct discharge.Be equipped with lifting blade or iron chains in kiln, the strong thermal efficiency of mixing of materials is high, is applicable to various contaminated soil of different nature.For organic polluted soil or mercury contaminated soil, this device can realize the removal efficiency of more than 99.9%, and operating cost is low.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under not departing from the present invention and designing the prerequisite of spirit, can also make some improvements and modifications, these improvements and modifications should be considered as protection scope of the present invention.
Claims (9)
1. for two-part rotary kiln indirect thermal desorption apparatus that organic polluted soil or mercury contaminated soil are repaired, comprise upper and lower two sledges, it is characterized in that: this device is made up of upper and lower two sledges, has a rotary kiln in each sledge, adopting indirect, is jacket type heater; This two-part rotary kiln indirect thermal desorption apparatus comprises horizontally disposed upper and lower two sledges, and upper and lower sledge is equipped with indirect rotary kiln; Upper sledge is made up of upper strata flue gas chuck and rotary kiln drying room, upper strata, and upper strata flue gas JI is connected with lower floor flue gas JO, and upper strata flue gas JO is connected with air preheater; In rotary kiln drying room, upper strata, upper front end is provided with material feeding bucket and charging flapper, is provided with discharging opening is connected with lower floor rotary kiln pyrogenation suction-chamber charging aperture in rotary kiln drying room, upper strata rear end lower; Be provided with steam (vapor) outlet in rear end, rotary kiln drying room, upper strata, on upper strata, rotary kiln drying chamber interior is provided with lifting blade or iron chains; Lower sledge is made up of lower floor's flue gas chuck and rotary kiln pyrogenation suction-chamber of lower floor, and be burner group bottom lower floor's flue gas chuck, lower floor's flue gas JO is connected with upper strata flue gas JI, and flue gas is contrary with material movement direction in upper and lower layer chuck; Be provided with charging aperture in lower floor's rotary kiln pyrogenation suction-chamber upper front end to be connected with rotary kiln drying room, upper strata discharging opening, be provided with discharge bucket in lower floor's rotary kiln drying room rear end lower and be connected with discharging flapper; Be provided with steam (vapor) outlet in rear end, rotary kiln pyrogenation suction-chamber of lower floor, be provided with lifting blade in inside, rotary kiln pyrogenation suction-chamber of lower floor.
2. device according to claim 1, is characterized in that: described rotary kiln drying room, upper strata and rotary kiln pyrogenation suction-chamber of lower floor are arranged in a sledge respectively.
3. device according to claim 1, is characterized in that: be equipped with the flapper preventing air leakage bottom described upper strata feeding funnel bottom part and described lower floor's discharge bucket.
4. device according to claim 1, is characterized in that: described burner group adopts natural gas, diesel oil, biomass fuel equal energy source to produce the high-temperature flue gas of 800 ~ 1200 DEG C, and the combustion-supporting required air of burner group is by air preheater preheating.
5. device according to claim 1, is characterized in that: upper strata rotary kiln drying chamber interior is provided with lifting blade or iron chains to increase being uniformly mixed and preventing material from luming of material.
6. device according to claim 1, is characterized in that: inside, rotary kiln pyrogenation suction-chamber of lower floor is provided with lifting blade equally to increase being uniformly mixed of material.
7. device according to claim 1, is characterized in that: upper and lower layer rotary kiln in sledge with certain angular slope and adjustable angle.
8. device according to claim 1, is characterized in that: upper and lower layer rotary kiln has certain rotational speed and rotating speed is adjustable.
9. device according to claim 1, realize the restorative procedure of Organic Pollution place or mercurous contaminated site, it is characterized in that: comprise the following steps, contaminated soil is less than 5cm through crushing and screening to particle diameter, evenly feed hopper is entered with fixing feed rate, by entering rotary kiln drying room, upper strata after charging flapper, advance under the rotation of rotary kiln; Heat smoke heating rotary kiln barrel thus indirect material in chuck, material is heated to more than 100 DEG C in rotary kiln drying indoor, upper strata, and contained moisture is evaporated; Enter in rotary kiln pyrogenation suction-chamber of lower floor be heated to 200 ~ 650 DEG C through preheating, dry material, organic matter or mercury are evaporated from steam (vapor) outlet as a vapor; After the process of rotary kiln pyrogenation suction-chamber of lower floor, the organic matter of more than 99.9% or mercury are desorbed to be separated, and clean material enters discharge bucket and carry out decreasing temperature and increasing humidity discharge after discharging flapper; After flue gas leaves upper strata flue gas chuck, enter air preheater and preheating is carried out to burner group combustion air used, realize waste heat recovery.
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107030100A (en) * | 2016-02-04 | 2017-08-11 | 北京建工环境修复股份有限公司 | Thermal desorption system and thermal desorption method |
CN107138515A (en) * | 2017-05-25 | 2017-09-08 | 浙江宜可欧环保科技有限公司 | A kind of heat supply method of energy-saving and emission-reduction |
CN107267170A (en) * | 2017-08-04 | 2017-10-20 | 陈军武 | Biomass carbonization pyrolysis installation |
CN108971216A (en) * | 2018-07-04 | 2018-12-11 | 赵全 | A kind of energy-saving soil pollution thermal desorption device |
CN109420669A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化学工业开发股份有限公司 | Method for recovering polluted soil containing mercury and dioxin and treatment equipment |
CN110548758A (en) * | 2019-08-29 | 2019-12-10 | 东华工程科技股份有限公司 | Indirect thermal desorption device of rotary kiln |
CN110986575A (en) * | 2019-10-16 | 2020-04-10 | 中国科学院生态环境研究中心 | Thermal desorption energy-saving system and method for repairing polycyclic aromatic hydrocarbon contaminated soil |
CN111495955A (en) * | 2020-04-29 | 2020-08-07 | 尤宝旺 | In-situ remediation method for petroleum-polluted soil |
CN112139231A (en) * | 2020-09-16 | 2020-12-29 | 山东大成环境修复有限公司 | System and method for low-temperature thermal desorption of volatile organic contaminated soil |
CN112645563A (en) * | 2020-12-25 | 2021-04-13 | 苏州精英环保有限公司 | Combined type ex-situ thermal desorption treatment system for oil sludge |
US10981204B2 (en) | 2018-05-23 | 2021-04-20 | Kunming University Of Science And Technology | Method and system for thermal desorption treatment of organic-contaminated soil and treatment of desorbed waste gas |
CN112718841A (en) * | 2020-11-19 | 2021-04-30 | 上海宝发环科技术有限公司 | Soil remediation method by coupling thermal desorption with chemical oxidation |
CN113118197A (en) * | 2021-05-08 | 2021-07-16 | 安徽省通源环境节能股份有限公司 | Indirect rotation thermal desorption device |
CN113664029A (en) * | 2018-09-04 | 2021-11-19 | 湖南新九方科技有限公司 | Thermal desorption restoration method for treating organic pollution site |
CN114101307A (en) * | 2021-11-10 | 2022-03-01 | 南京中船绿洲环保有限公司 | Fused salt circulating in-situ thermal desorption soil remediation system and method |
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CN103272838A (en) * | 2013-05-27 | 2013-09-04 | 浙江大学 | Method and device for repairing contaminated soil with persistent organic pollutants |
CN203578349U (en) * | 2013-11-01 | 2014-05-07 | 中科华南(厦门)环保有限公司 | Environment-friendly energy-saving organic polluted soil thermal desorption recovery treatment system |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107030100A (en) * | 2016-02-04 | 2017-08-11 | 北京建工环境修复股份有限公司 | Thermal desorption system and thermal desorption method |
CN107138515A (en) * | 2017-05-25 | 2017-09-08 | 浙江宜可欧环保科技有限公司 | A kind of heat supply method of energy-saving and emission-reduction |
CN107267170A (en) * | 2017-08-04 | 2017-10-20 | 陈军武 | Biomass carbonization pyrolysis installation |
CN109420669A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化学工业开发股份有限公司 | Method for recovering polluted soil containing mercury and dioxin and treatment equipment |
US10981204B2 (en) | 2018-05-23 | 2021-04-20 | Kunming University Of Science And Technology | Method and system for thermal desorption treatment of organic-contaminated soil and treatment of desorbed waste gas |
CN108971216A (en) * | 2018-07-04 | 2018-12-11 | 赵全 | A kind of energy-saving soil pollution thermal desorption device |
CN113664029A (en) * | 2018-09-04 | 2021-11-19 | 湖南新九方科技有限公司 | Thermal desorption restoration method for treating organic pollution site |
CN110548758A (en) * | 2019-08-29 | 2019-12-10 | 东华工程科技股份有限公司 | Indirect thermal desorption device of rotary kiln |
CN110986575A (en) * | 2019-10-16 | 2020-04-10 | 中国科学院生态环境研究中心 | Thermal desorption energy-saving system and method for repairing polycyclic aromatic hydrocarbon contaminated soil |
CN111495955A (en) * | 2020-04-29 | 2020-08-07 | 尤宝旺 | In-situ remediation method for petroleum-polluted soil |
CN112139231A (en) * | 2020-09-16 | 2020-12-29 | 山东大成环境修复有限公司 | System and method for low-temperature thermal desorption of volatile organic contaminated soil |
CN112718841A (en) * | 2020-11-19 | 2021-04-30 | 上海宝发环科技术有限公司 | Soil remediation method by coupling thermal desorption with chemical oxidation |
CN112645563A (en) * | 2020-12-25 | 2021-04-13 | 苏州精英环保有限公司 | Combined type ex-situ thermal desorption treatment system for oil sludge |
CN113118197A (en) * | 2021-05-08 | 2021-07-16 | 安徽省通源环境节能股份有限公司 | Indirect rotation thermal desorption device |
CN114101307A (en) * | 2021-11-10 | 2022-03-01 | 南京中船绿洲环保有限公司 | Fused salt circulating in-situ thermal desorption soil remediation system and method |
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Application publication date: 20150527 |