CN111346908A - Device and method for segmented thermal remediation of organic contaminated soil - Google Patents
Device and method for segmented thermal remediation of organic contaminated soil Download PDFInfo
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- CN111346908A CN111346908A CN202010268923.0A CN202010268923A CN111346908A CN 111346908 A CN111346908 A CN 111346908A CN 202010268923 A CN202010268923 A CN 202010268923A CN 111346908 A CN111346908 A CN 111346908A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
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Abstract
The invention relates to a device and a method for segmented thermal remediation of organic contaminated soil, and belongs to the field of soil remediation. The organic contaminated soil is sent into a stirring type preheating device to indirectly exchange heat with a circulating heat exchange medium in the device, the organic contaminated soil is continuously stirred and heated, moisture and light organic pollutants in the soil are separated out in the heating process, and the organic contaminated soil is condensed by a condensing device A and then sent into a non-condensable gas storage tank to be stored; the soil after preheating sends into thermal desorption device, carry out the direct contact heat transfer with the high temperature noncondensable gas that comes from combustion heat exchanger, preheat soil and heated to higher temperature, remaining organic pollutant takes place the thermal desorption reaction in the soil, desorption gaseous product sends into condensing equipment B and condenses, the condensate gets into the condensate storage tank, granule bed air cooling device is sent into to high temperature soil after the thermal desorption, oxygen in remaining trace organic matter and the air in the high temperature soil takes place the micro-combustion reaction and is cooled down by the air cooling, finally discharge with the form of the clean soil of low temperature.
Description
Technical Field
The invention belongs to the field of soil remediation, and particularly relates to a device and a method for remediating organic contaminated soil through sectional heat.
Background
With the acceleration of urbanization and industrialization process in China, the proportion of organic contaminated soil is increased year by year, and high organic content soil can transfer pollutants to crops along with agricultural planting and then enter human bodies through food chains, so that the health of the human bodies is seriously harmed. Therefore, the treatment of soil pollution is not slow enough.
At present, the thermal remediation mode of the organic polluted soil mainly adopts an incineration technology and a thermal desorption technology, and supporting facilities of incineration treatment equipment are complex, large in occupied area and high in investment and operating cost; the thermal desorption method is considered to be one of cleaner technologies for treating the organic contaminated soil, and the conventional thermal desorption method has the problems of low heat exchange efficiency, high process energy consumption and the like, and the development of the technology is seriously restricted at present.
Disclosure of Invention
In order to overcome the defects of the existing production process, the invention provides a sectional type device and a sectional type method for thermally restoring organic contaminated soil, which are used for graded heat treatment of the organic contaminated soil, reduce the process energy consumption, reduce the generation amount of process pollutants, greatly reduce the operation cost and facilitate the industrial application of the organic contaminated soil.
The technical scheme of the invention is as follows:
a device for the sectional thermal remediation of organic contaminated soil comprises a stirring type preheating device 1, a condensing device A2, a non-condensable gas storage tank 3, a combustion heat exchanger 4, a condensing device B5, a condensed liquid storage tank 6, a thermal desorption device 7, a particle bed air cooling device 8 and a flue gas washing device 9;
a gas outlet of the stirring type preheating device 1 is connected with a condensing device A2, a circulating heat exchange medium circulation channel is arranged in the stirring type preheating device 1 and is used for receiving a high-temperature circulating heat exchange medium from a condensing device B5, the low-temperature circulating heat exchange medium after heat release is introduced into a condensing device B5, and a preheated soil outlet of the stirring type preheating device 1 is connected with a thermal analysis device 7;
the outlet of the condensing device A2 is connected with the non-condensable gas storage tank 3;
the non-condensable gas storage tank 3 receives and stores the non-condensable gas from the condensing device A2 and the condensing device B5, and a low-temperature non-condensable gas outlet of the non-condensable gas storage tank 3 is connected with the combustion heat exchanger 4;
a heat exchange tube bundle is arranged in the combustion heat exchanger 4, low-temperature non-condensable gas from the non-condensable gas storage tank 3 is received in the heat exchange tube bundle, preheated air of a liquid tar and particle bed air cooling device 8 from a condensate storage tank 6 is received outside the heat exchange tube bundle, a high-temperature non-condensable gas outlet of the combustion heat exchanger 4 is connected with a thermal analysis device 7, and a flue gas outlet is connected with a flue gas washing device 9;
a condensing tube bundle is arranged in the condensing device B5, a low-temperature circulating heat exchange medium from the stirring type preheating device 1 flows through the inside of the condensing tube bundle, a thermal desorption high-temperature gas product from the thermal desorption device 7 flows through the outside of the condensing tube bundle, and a condensate outlet of the condensing device B5 is connected with the condensate storage tank 6;
separating liquid tar from water in the condensate storage tank 6, and feeding the separated liquid tar into the combustion heat exchanger 4;
a high-temperature soil outlet of the thermal desorption device 7 is connected with a granular bed air cooling device 8;
the granular bed air cooling device 8 is provided with an external air inlet and a preheated air outlet.
A method for the sectional thermal remediation of organic contaminated soil uses the energy contained in the organic contaminated soil for the graded thermal treatment thereof, and comprises the following steps:
i, stirring and drying stage: the method comprises the following steps that organic contaminated soil to be treated is sent into a stirring type preheating device 1, indirect heat exchange is carried out on the organic contaminated soil and a high-temperature circulating heat exchange medium from a condensing device B5, the organic contaminated soil is continuously stirred and heated, gas separated out from the organic contaminated soil in the heating process is sent into a noncondensable gas storage tank 3 for storage after being condensed by a condensing device A2, and the low-temperature circulating heat exchange medium after heat exchange is sent into a condensing device B5 for heat storage;
II, thermal desorption stage: the preheated soil is sent into a thermal desorption device 7 to carry out direct contact type heat exchange with the high-temperature noncondensable gas from the combustion heat exchanger 4, the organic polluted soil is heated again and carries out thermal desorption reaction, the desorption gas product in the organic polluted soil is continuously separated out and sent into a condensing device B5, and the high-temperature soil with extremely low pollutant content after the thermal desorption reaction is finished is sent into a granular bed air cooling device 8;
III, energy recovery stage: the high-temperature gas product after thermal desorption and a low-temperature circulating heat exchange medium in a condensing tube bundle in a condensing device B5 are subjected to indirect heat exchange, the low-temperature circulating heat exchange medium is continuously heated, the high-temperature gas product after thermal desorption is continuously condensed, liquid separated out in the condensing process is sent to a condensate storage tank 6 for storage, liquid tar and water are separated in the condensate storage tank 6, the separated liquid tar is sent to a combustion heat exchanger 4 and is subjected to micro-combustion reaction with preheated air in the combustion heat exchanger 4, high-temperature flue gas generated in the combustion process is used for heating low-temperature non-condensable gas in the heat exchange tube bundle, the heated high-temperature non-condensable gas is sent to a thermal desorption device 7, and the low-temperature flue gas is sent to a flue gas washing;
IV, secondary purification and temperature reduction stage: after the thermal desorption reaction, the high-temperature soil with extremely low organic pollutant content is sent into the particle bed air cooling device 8, and simultaneously, the external air is introduced into the particle bed air cooling device 8, so that the air and the residual trace organic matters in the soil are subjected to micro-combustion reaction, the organic matters are further removed, the high-temperature soil is cooled, and the soil after secondary purification is finally discharged in a low-temperature soil cleaning manner.
The temperature in the stirring type preheating device 1 is maintained at 90-150 ℃; the temperature in the thermal desorption apparatus 7 is maintained at 400 to 700 ℃.
The invention has the beneficial effects that:
(1) the organic contaminated soil has high water content and large viscosity, and the sectional thermal remediation technology is adopted, so that on one hand, water can be removed firstly, the subsequent sensible heat consumption is reduced, on the other hand, the viscosity of the soil can be reduced, and the subsequent treatment is facilitated.
(2) The whole process is completed below 700 ℃, so that the volatilization of mineral elements in the soil can be reduced, and the fertility of the treated soil is ensured.
(3) When the content of the organic pollutants is more than 8%, the energy self-sustaining of the whole process can be realized, and when the content of the organic pollutants is more than 10%, partial resources can be even recycled by adopting the process.
Drawings
FIG. 1 is a schematic structural diagram of the whole device of the present invention.
In the figure: 1, a stirring type preheating device; 2, a condensing device A; 3, a noncondensable gas storage tank; 4, a combustion heat exchanger; 5 a condensing device B; 6, a condensate storage tank; 7 thermal desorption means; 8 a granular bed air cooling device; 9 flue gas washing device.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
Examples
The method comprises the following steps that organic contaminated soil to be treated is sent into a stirring type preheating device 1, indirect heat exchange is carried out on the organic contaminated soil and a high-temperature circulating heat exchange medium from a condensing device B5, the organic contaminated soil is continuously stirred and heated, gas separated out from the organic contaminated soil in the heating process is sent into a noncondensable gas storage tank 3 for storage after being condensed by a condensing device A2, and the high-temperature circulating heat exchange medium after heat exchange is sent into a condensing device B5 for heat storage; the preheated soil is sent into a thermal desorption device 7 to carry out direct contact type heat exchange with the high-temperature noncondensable gas from the combustion heat exchanger 4, the organic polluted soil is heated again and carries out thermal desorption reaction, the desorption gas product in the organic polluted soil is continuously separated out and sent into a condensing device B5, and the high-temperature soil with extremely low pollutant content after the thermal desorption reaction is finished is sent into a granular bed air cooling device 8; the high-temperature gas product after thermal desorption and a low-temperature circulating heat exchange medium in a condensing tube bundle in a condensing device B5 are subjected to indirect heat exchange, the low-temperature circulating heat exchange medium is continuously heated, the high-temperature gas product after thermal desorption is continuously condensed, liquid separated out in the condensing process is sent to a condensate storage tank 6 for storage, liquid tar and water are separated in the condensate storage tank 6, the separated liquid tar is sent to a combustion heat exchanger 4 and is subjected to micro-combustion reaction with preheated air in the combustion heat exchanger 4, high-temperature flue gas generated in the combustion process is used for heating low-temperature non-condensable gas in the heat exchange tube bundle, the heated high-temperature non-condensable gas is sent to a thermal desorption device 7, and the low-temperature flue gas is sent to a flue gas washing; after the thermal desorption reaction is finished, the high-temperature soil with extremely low pollutant content is sent into the particle bed air cooling device 8, meanwhile, outside air is introduced into the particle bed air cooling device 8, on one hand, the air and residual trace organic matters in the soil are subjected to micro-combustion reaction, the organic matters are further removed, on the one hand, the high-temperature soil is cooled, and the soil after secondary purification is finally discharged in a low-temperature soil cleaning mode. The temperature in the stirring type preheating device 1 is maintained at 90-150 ℃; the temperature in the thermal desorption apparatus 7 is maintained at 400 to 700 ℃.
The present invention includes but is not limited to the embodiment, and it should be noted that, for those skilled in the art, other alternatives can be adopted without departing from the technical principle of the present invention, and these alternatives should also be regarded as the protection scope of the present invention.
Claims (4)
1. The device for the sectional thermal remediation of the organic contaminated soil is characterized by comprising a stirring type preheating device (1), a condensing device A (2), a non-condensable gas storage tank (3), a combustion heat exchanger (4), a condensing device B (5), a condensed liquid storage tank (6), a thermal desorption device (7), a granular bed air cooling device (8) and a flue gas washing device (9);
a gas outlet of the stirring type preheating device (1) is connected with the condensing device A (2), a circulating heat exchange medium circulation channel is arranged in the stirring type preheating device (1) and used for receiving a high-temperature circulating heat exchange medium from the condensing device B (5) and introducing the heat-released low-temperature circulating heat exchange medium into the condensing device B (5), and a preheated soil outlet of the stirring type preheating device (1) is connected with a thermal desorption device (7);
the outlet of the condensing device A (2) is connected with a non-condensable gas storage tank (3);
the non-condensable gas storage tank (3) receives and stores the non-condensable gas from the condensing device A (2) and the condensing device B (5), and a low-temperature non-condensable gas outlet of the non-condensable gas storage tank (3) is connected with the combustion heat exchanger (4);
a heat exchange tube bundle is arranged in the combustion heat exchanger (4), low-temperature non-condensable gas from the non-condensable gas storage tank (3) is received in the heat exchange tube bundle, and preheated air of a liquid tar and particle bed air cooling device (8) from the condensate storage tank (6) is received outside the heat exchange tube bundle; a high-temperature non-condensable gas outlet of the combustion heat exchanger (4) is connected with a thermal desorption device (7), and a flue gas outlet is connected with a flue gas washing device (9);
a condensing tube bundle is arranged in the condensing device B (5), a low-temperature circulating heat exchange medium from the stirring type preheating device (1) flows through the inside of the condensing tube bundle, a thermal desorption high-temperature gas product from the thermal desorption device (7) flows through the outside of the condensing tube bundle, and a condensate outlet of the condensing device B (5) is connected with a condensate storage tank (6);
separating liquid tar from water in the condensate storage tank (6), and feeding the separated liquid tar into the combustion heat exchanger (4);
a high-temperature soil outlet of the thermal desorption device (7) is connected with a granular bed air cooling device (8);
the particle bed air cooling device (8) is provided with an external air inlet and a preheated air outlet.
2. A method for the sectional thermal remediation of organic contaminated soil is characterized in that energy contained in the organic contaminated soil is used for the classified thermal treatment of the organic contaminated soil, and the method comprises the following steps:
stirring and drying stage: feeding the organic contaminated soil to be treated into a stirring type preheating device (1), carrying out indirect heat exchange with a high-temperature circulating heat exchange medium from a condensing device B (5), continuously stirring and heating the organic contaminated soil, condensing gas separated out from the organic contaminated soil in the heating process through a condensing device A (2), feeding the condensed gas into a noncondensable gas storage tank (3) for storage, and feeding the low-temperature circulating heat exchange medium subjected to heat exchange into the condensing device B (5) for heat storage;
(II) thermal desorption stage: the preheated soil is sent into a thermal desorption device (7) to carry out direct contact type heat exchange with high-temperature noncondensable gas from a combustion heat exchanger (4), the organic polluted soil is heated again and generates thermal desorption reaction, the desorption gas product in the organic polluted soil is continuously separated out and sent into a condensing device B (5), and the high-temperature soil with extremely low pollutant content after the thermal desorption reaction is finished is sent into a particle bed air cooling device (8);
(III) energy recovery stage: the high-temperature gas product after thermal desorption and a low-temperature circulating heat exchange medium in a condensation tube bundle in a condensation device B (5) carry out indirect heat exchange, the low-temperature circulating heat exchange medium is continuously heated, the high-temperature gas product after thermal desorption is continuously condensed, liquid separated out in the condensation process is sent into a condensate storage tank (6) for storage, liquid tar and water are separated in the condensate storage tank (6), the separated liquid tar is sent into a combustion heat exchanger (4) and carries out micro combustion reaction with preheated air in the combustion heat exchanger, high-temperature flue gas generated in the combustion process is used for heating low-temperature non-condensable gas in the heat exchange tube bundle, the heated high-temperature non-condensable gas is sent into a thermal desorption device (7), and the low-temperature flue gas is sent into a flue gas washing device (9) for washing;
(IV) secondary purification and temperature reduction stage: after the thermal desorption reaction, the high-temperature soil with extremely low organic pollutant content is sent into the particle bed air cooling device (8), and meanwhile, outside air is introduced into the particle bed air cooling device (8), so that the air and residual trace organic matters in the soil are subjected to micro-combustion reaction, the organic matters are further removed, on one hand, the high-temperature soil is cooled, and the soil after secondary purification is finally discharged in a low-temperature soil cleaning mode.
3. The method for the sectional thermal remediation of organic contaminated soil according to claim 2, wherein the temperature in the stirring type preheating device (1) is maintained at 90-150 ℃.
4. The method for the sectional thermal remediation of organic contaminated soil according to claim 2 or 3, wherein the temperature inside the thermal desorption device (7) is maintained at 400-700 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113060704A (en) * | 2021-03-30 | 2021-07-02 | 大连理工大学 | Organic solid clean and efficient hydrogen production device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3706684A1 (en) * | 1986-04-08 | 1987-10-15 | Kurt Von Dipl Chem D Beckerath | METHOD FOR REMOVING VOLATILE POLLUTANTS FROM CONTAMINATED SOILS, SANDS, SLURRY AND COMPARABLE SOLID AGGREGATES AND RESIDUES |
| CN103894412A (en) * | 2014-03-26 | 2014-07-02 | 东南大学 | Method for repairing and upgrading soil |
| CN104307864A (en) * | 2014-11-11 | 2015-01-28 | 常州宝利环保科技有限公司 | Remediation method of organic contaminated soil |
| CN104874593A (en) * | 2015-05-19 | 2015-09-02 | 北京鼎实环境工程有限公司 | Method and device for treating organic polluted soil by two-section-type indirect thermal desorption technology |
| CN205650605U (en) * | 2015-12-17 | 2016-10-19 | 上海康恒环境股份有限公司 | Restore organic contaminated soil's sectional type heating, modularization thermal desorption equipment |
| CN108787728A (en) * | 2017-05-05 | 2018-11-13 | 北京华盛坤泰环境科技股份有限公司 | A kind of the Thermal desorption restorative procedure and system of organic material contaminated soil |
| CN109078975A (en) * | 2018-07-16 | 2018-12-25 | 北京建工环境修复股份有限公司 | A kind of contaminated soil is classified indirect thermal desorption coupling and catalyzing degradation repair system and method |
-
2020
- 2020-04-08 CN CN202010268923.0A patent/CN111346908B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3706684A1 (en) * | 1986-04-08 | 1987-10-15 | Kurt Von Dipl Chem D Beckerath | METHOD FOR REMOVING VOLATILE POLLUTANTS FROM CONTAMINATED SOILS, SANDS, SLURRY AND COMPARABLE SOLID AGGREGATES AND RESIDUES |
| CN103894412A (en) * | 2014-03-26 | 2014-07-02 | 东南大学 | Method for repairing and upgrading soil |
| CN104307864A (en) * | 2014-11-11 | 2015-01-28 | 常州宝利环保科技有限公司 | Remediation method of organic contaminated soil |
| CN104874593A (en) * | 2015-05-19 | 2015-09-02 | 北京鼎实环境工程有限公司 | Method and device for treating organic polluted soil by two-section-type indirect thermal desorption technology |
| CN205650605U (en) * | 2015-12-17 | 2016-10-19 | 上海康恒环境股份有限公司 | Restore organic contaminated soil's sectional type heating, modularization thermal desorption equipment |
| CN108787728A (en) * | 2017-05-05 | 2018-11-13 | 北京华盛坤泰环境科技股份有限公司 | A kind of the Thermal desorption restorative procedure and system of organic material contaminated soil |
| CN109078975A (en) * | 2018-07-16 | 2018-12-25 | 北京建工环境修复股份有限公司 | A kind of contaminated soil is classified indirect thermal desorption coupling and catalyzing degradation repair system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060704A (en) * | 2021-03-30 | 2021-07-02 | 大连理工大学 | Organic solid clean and efficient hydrogen production device and method |
| CN113060704B (en) * | 2021-03-30 | 2023-05-12 | 大连理工大学 | Organic solid clean high-efficiency hydrogen production device and method |
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