Thermal desorption device for organic contaminated soil

Abstract

The utility model discloses a thermal desorption device for organic contaminated soil, and relates to the technical field of thermal desorption devices, the thermal desorption device for the organic contaminated soil comprises an extraction mechanism, a heating mechanism, a wastewater treatment mechanism and a waste gas treatment mechanism, the extraction mechanism is provided with a horizontal multiphase extraction pipe and a vertical multiphase extraction pipe; the heating mechanism comprises an energy storage assembly, an energy conveying assembly, a heating assembly and a waste heat recovery assembly which are connected in sequence. The waste gas treatment mechanism comprises a plurality of activated carbon treatment tanks which are connected in sequence; the heating assembly comprises a first heating piece and a second heating piece, and the vertical multiphase extraction pipes are distributed between the first heating piece and the second heating piece; the waste heat recovery assembly is adopted to realize waste heat recovery, so that resource recovery and reutilization are realized, and resource waste is avoided; the water treatment mechanism and the waste gas treatment mechanism are adopted to treat waste water and waste gas respectively, and pollution of the waste water and the waste gas to the environment is avoided.

Description

Technical Field

[0001] The utility model relates to the field technology of thermal desorption devices, in particular to a thermal desorption device for organic polluted soil. Background Art

[0002] With the increasing development of industrialization, soil is facing the problem of organic pollution. Thermal desorption technology heats the soil to a certain temperature by direct or indirect heating, so that the organic pollutant components therein are volatilized by heat and separated from the soil medium, and then the volatilized pollutants are effectively collected and treated, thereby achieving the purpose of soil remediation. The utility model with application number 201720402232.9 discloses a thermal desorption device for organic contaminated soil. The thermal desorption device in the prior art does not use a residual heat recovery component to realize the recovery of residual heat, which is not convenient for resource recycling and reuse, resulting in waste of resources; it does not use a water treatment mechanism and a waste gas treatment mechanism to respectively realize the treatment of wastewater and waste gas, which is easy to cause wastewater and waste gas to pollute the environment. Therefore, in view of this situation, it is urgent to develop a thermal desorption device for organic contaminated soil to meet the needs of actual use. Utility Model Content

[0003] In view of this, the utility model aims to address the deficiencies in the prior art, and its main purpose is to provide an organic contaminated soil thermal desorption device, which realizes the recovery of residual heat by adopting a residual heat recovery component, thereby recycling and reusing resources and avoiding waste of resources; and realizes the treatment of wastewater and waste gas by adopting a water treatment mechanism and a waste gas treatment mechanism, respectively, thereby avoiding the pollution of the environment by wastewater and waste gas.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for thermal desorption of organic contaminated soil comprises an extraction mechanism, a heating mechanism, a wastewater treatment mechanism and a waste gas treatment mechanism, wherein the extraction mechanism has a horizontal multiphase extraction pipe and a vertical multiphase extraction pipe; the heating mechanism comprises an energy storage component, an energy transmission component, a heating component and a residual heat recovery component connected in sequence; the horizontal multiphase extraction pipe is distributed beside the heating component; the waste gas treatment mechanism comprises a plurality of activated carbon treatment tanks connected in sequence; the heating component comprises a first heating element and a second heating element, and the vertical multiphase extraction pipe is distributed between the first heating element and the second heating element.

[0006] As a preferred solution: the first heating element and the second heating element both include an inner tube and an outer tube, the outer tube is sleeved on the outside of the inner tube, and the inner tube and the outer tube are both hollow tubular structures.

[0007] As a preferred solution: the first heating element and the second heating element are vertically parallel and distributed, and the first heating element and the second heating element are symmetrically distributed on both sides of the vertical multiphase extraction tube.

[0008] As a preferred solution: there are two horizontal multiphase extraction pipes, which are respectively arranged on both sides of the heating component; the upper ends of the first heating element and the second heating element are both provided with flow meter tubes for the entry of air and gas.

[0009] As a preferred solution: the energy storage component is an energy storage tank, the energy delivery component is a delivery pipe, one end of the delivery pipe is connected to the energy storage tank, and the other end of the delivery pipe is connected to the heating component; the residual heat recovery component is a residual heat recovery pipe.

[0010] As a preferred solution: the wastewater treatment mechanism includes a primary treatment tank and a secondary treatment tank which are distributed in sequence, and the activated carbon treatment tank is arranged at the rear side of the secondary treatment tank.

[0011] As a preferred solution: a ventilation pipe is provided on the lower side of the outer tube, and an air inlet pipe for air intake is provided on the upper side of the outer tube.

[0012] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the thermal desorption treatment of organic contaminated soil is automatically realized by adopting the extraction mechanism, the heating mechanism, the wastewater treatment mechanism and the waste gas treatment mechanism, thereby improving the treatment efficiency; the residual heat is recovered by adopting the residual heat recovery component, and the resource recycling and reuse is realized to avoid the waste of resources; the wastewater and waste gas are treated respectively by adopting the water treatment mechanism and the waste gas treatment mechanism, thereby avoiding the pollution of the environment by the wastewater and waste gas.

[0013] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the thermal desorption device for organic contaminated soil of the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the heating component of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the inner tube and the outer tube of the utility model;

[0017] Figure 4 It is a cross-sectional view of the inner tube and outer tube of the utility model.

[0018] Description of the accompanying drawings:

[0019] In the figure: 10, extraction mechanism; 11, horizontal multiphase extraction pipe; 12, vertical multiphase extraction pipe; 20, heating mechanism; 21, energy storage component; 22, energy transmission component; 23, heating component; 231, first heating element; 232, second heating element; 2321, inner pipe; 2322, outer pipe; 233, ventilation pipe; 234, air inlet pipe; 235, flow meter; 30, wastewater treatment mechanism; 31, primary treatment tank; 32, secondary treatment tank; 40, waste gas treatment mechanism. DETAILED DESCRIPTION

[0020] The utility model Figures 1 to 4 As shown, a device for thermal desorption of organic contaminated soil includes an extraction mechanism 10, a heating mechanism 20, a wastewater treatment mechanism 30 and a waste gas treatment mechanism 40, wherein:

[0021] The extraction mechanism 10 has a horizontal multiphase extraction pipe 11 and a vertical multiphase extraction pipe 12; the heating mechanism 20 includes an energy storage component 21, an energy transmission component 22, a heating component 23 and a residual heat recovery component connected in sequence; the horizontal multiphase extraction pipe 11 is distributed beside the heating component 23; the exhaust gas treatment mechanism 40 includes a plurality of activated carbon treatment tanks connected in sequence; the heating component 23 includes a first heating element 231 and a second heating element 232, and the vertical multiphase extraction pipe 12 is distributed between the first heating element 231 and the second heating element 232.

[0022] The extraction mechanism 10 is connected to the heating mechanism 20, the energy storage component 21 stores energy, the energy delivery component 22 delivers energy to the heating component 23, the heating component 23 heats the soil to a certain temperature, so that the organic pollutant components therein are volatilized by heat and separated from the soil medium; the residual heat recovery component recycles and reuses the residual heat; the wastewater treatment mechanism 30 treats wastewater, and the waste gas treatment mechanism 40 effectively collects and treats the volatilized pollutants.

[0023] By adopting the extraction mechanism 10, the heating mechanism 20, the wastewater treatment mechanism 30 and the waste gas treatment mechanism 40, the thermal desorption treatment of organic contaminated soil is automatically realized, thereby improving the treatment efficiency; by adopting the residual heat recovery component, the residual heat is recovered, the resource recycling and reuse is realized, and the waste of resources is avoided; by adopting the water treatment mechanism and the waste gas treatment mechanism 40, the wastewater and waste gas are treated respectively, thereby avoiding the pollution of the environment by the wastewater and waste gas.

[0024] The first heating element 231 and the second heating element 232 both include an inner tube 2321 and an outer tube 2322. The outer tube 2322 is sleeved on the outer side of the inner tube 2321. The inner tube 2321 and the outer tube 2322 are both hollow tubular structures. The heating efficiency is improved by using the inner tube 2321 and the outer tube 2322.

[0025] The first heating element 231 and the second heating element 232 are vertically distributed in parallel. The first heating element 231 and the second heating element 232 are symmetrically distributed on both sides of the vertical multi-phase extraction tube 12 .

[0026] There are two horizontal multiphase extraction pipes 11, which are respectively arranged on both sides of the heating component 23; the upper ends of the first heating element 231 and the second heating element 232 are both provided with flow meter tubes 235 for air and gas to enter.

[0027] The flow meter tube 235 is used to allow air and fuel gas to enter while ensuring the gas flow rate.

[0028] The energy storage component 21 is an energy storage tank, the energy delivery component 22 is a delivery pipe, one end of the delivery pipe is connected to the energy storage tank, and the other end of the delivery pipe is connected to the heating component 23; the residual heat recovery component is a residual heat recovery pipe; by using the residual heat recovery pipe to recover the residual heat, waste of resources is avoided.

[0029] The wastewater treatment mechanism 30 includes a primary treatment tank 31 and a secondary treatment tank 32 which are sequentially distributed, and the activated carbon treatment tank is arranged at the rear side of the secondary treatment tank 32 .

[0030] The primary treatment tank 31 and the secondary treatment tank 32 are used to respectively realize the primary treatment and the secondary treatment of the wastewater, thereby ensuring the treatment effect.

[0031] A ventilation pipe 233 is provided at the lower side of the outer tube 2322 , and an air inlet pipe 234 for air to enter is provided at the upper side of the outer tube 2322 .

[0032] The use method and principle of the organic contaminated soil thermal desorption device are as follows:

[0033] The extraction mechanism is connected to the heating mechanism, the energy storage component stores energy, the energy delivery component delivers energy to the heating component, the heating component heats the soil to a certain temperature, so that the organic pollutant components therein are volatilized by heat and separated from the soil medium; the residual heat recovery component recycles and reuses the residual heat; the wastewater treatment mechanism treats the wastewater, and the waste gas treatment mechanism effectively collects and treats the volatilized pollutants.

[0034] The design focus of the utility model is that the thermal desorption treatment of organic polluted soil is automatically realized by adopting an extraction mechanism, a heating mechanism, a wastewater treatment mechanism and a waste gas treatment mechanism, thereby improving the treatment efficiency; the waste heat is recovered by adopting a waste heat recovery component, resource recycling and reuse are achieved, and waste of resources is avoided; the waste water and waste gas are treated respectively by adopting a water treatment mechanism and a waste gas treatment mechanism, thereby avoiding the pollution of the environment by waste water and waste gas.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A thermal desorption device for organic contaminated soil, characterized by: It includes an extraction mechanism, a heating mechanism, a wastewater treatment mechanism and a waste gas treatment mechanism, wherein the extraction mechanism has a horizontal multiphase extraction pipe and a vertical multiphase extraction pipe; the heating mechanism includes an energy storage component, an energy transmission component, a heating component and a residual heat recovery component connected in sequence; the horizontal multiphase extraction pipe is distributed beside the heating component; the waste gas treatment mechanism includes a plurality of activated carbon treatment tanks connected in sequence; the heating component includes a first heating element and a second heating element, and the vertical multiphase extraction pipe is distributed between the first heating element and the second heating element.

2. The organic contaminated soil thermal desorption device according to claim 1, characterized in that: The first heating element and the second heating element both include an inner tube and an outer tube. The outer tube is sleeved on the outer side of the inner tube. The inner tube and the outer tube both have a hollow tubular structure.

3. The organic contaminated soil thermal desorption device according to claim 1, characterized in that: The first heating element and the second heating element are vertically parallel and symmetrically distributed on both sides of the vertical multiphase extraction tube.

4. The organic contaminated soil thermal desorption device according to claim 1, characterized in that: There are two horizontal multiphase extraction pipes, which are respectively arranged on both sides of the heating component; the upper ends of the first heating element and the second heating element are both provided with flow meter tubes for the entry of air and gas.

5. The organic contaminated soil thermal desorption device according to claim 1, characterized in that: The energy storage component is an energy storage tank, the energy delivery component is a delivery pipe, one end of the delivery pipe is connected to the energy storage tank, and the other end of the delivery pipe is connected to the heating component; the residual heat recovery component is a residual heat recovery pipe.

6. The organic contaminated soil thermal desorption device according to claim 1, characterized in that: The wastewater treatment mechanism comprises a primary treatment tank and a secondary treatment tank which are sequentially distributed, and the activated carbon treatment tank is arranged at the rear side of the secondary treatment tank.

7. The organic contaminated soil thermal desorption device according to claim 2, characterized in that: A ventilation pipe is provided at the lower side of the outer tube, and an air inlet pipe for air to enter is provided at the upper side of the outer tube.

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