A medium internal circulation enhanced thermal desorption soil remediation reactor and method thereof
A technology of soil remediation and thermal desorption, which is applied in the field of media internal circulation enhanced thermal desorption soil remediation reactor, can solve the problems of lack of large soil fragmentation measures, high energy consumption, and inability to achieve significant improvement in heat transfer efficiency, etc., to achieve Improve equipment processing efficiency and pollutant removal effect, reduce system energy consumption
Active Publication Date: 2021-08-10
NANJING TECH UNIV +2
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These two patents disclose the structural principle of a typical indirect thermal desorption reactor. The heating method is that the hot air passes through the "outer cylinder" and the "rotary kiln inner sleeve" to indirectly heat the internal soil. The heat transfer method is single. When the size of the "kiln inner sleeve" is constant, the heat transfer efficiency cannot be significantly improved; there is a lack of crushing measures for large pieces of soil, and the removal rate of pollutants is not high; the heat source is fuel combustion, and the energy consumption is high
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Embodiment 1
[0041] like Figure 1-3 As shown, a medium internal circulation enhanced thermal desorption soil remediation reactor, the reactor includes a raw soil inlet feed device 1, a fixed cover 2 at the feed end, a rotating drum 3, and a discharge with treated soil outlet An end fixing cover 5; a heat medium 9 is provided in the drum 3, and a material retaining sieve plate 11 for separating the soil and the heat medium is provided at the discharge end of the drum 3.
[0042] The outside of the drum 3 is provided with an outer cover 4 with 2 flue gas inlets and 1 flue gas outlet, and an inner tube bundle is arranged inside the drum 3, and the flue gas inlet of the inner tube bundle 7 is connected with the flue gas inlet of the drum 3 The flue gas outlet of the inner tube bundle 7 is connected with the flue gas outlet on the outer cover 4; the area between the outer side of the drum 3 and the inner side of the outer cover 4 is a flue gas jacket, and the other flue gas inlet of the drum 3...
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The invention discloses a medium internal circulation enhanced thermal desorption soil restoration reactor and a method thereof, belonging to the technical field of soil restoration. The internal circulation of the heat medium is realized through a specially designed drum structure, and a method of using organic pollutants to oxidize and decompose to heat the soil is proposed. Without increasing the equipment scale, the equipment processing efficiency and pollutant removal effect are significantly improved. At the same time Reduced system energy consumption.
Description
technical field [0001] The invention belongs to the technical field of soil remediation of polluted sites, is applicable to the remediation of soil in organic polluted sites, and in particular relates to a soil remediation reactor and a method thereof for enhanced thermal desorption in a medium circulation. Background technique [0002] Soil refers to the loose surface layer on the land surface that is fertile and capable of growing plants. When too many harmful substances discharged into the soil exceed the self-purification capacity of the soil, the composition, structure and function of the soil will change, and microbial activities will be inhibited. Harmful substances or Its decomposition products gradually accumulate in the soil through "soil → plant → human body", or are indirectly absorbed by the human body through "soil → water → human body", reaching the level of endangering human health, and soil pollution occurs. [0003] At present, the heavily polluted sites ma...
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IPC IPC(8): B09C1/06
CPCB09C1/06
Inventor 徐海涛凌祥张胜田周永贤陈纪赛王小峰胡孙秦海燕
Owner NANJING TECH UNIV