CN212384274U - Small test equipment for soil thermal desorption - Google Patents

Abstract

The utility model discloses a soil thermal desorption small test device, which comprises a shell, a thermal desorption system and a tail gas treatment system, wherein the thermal desorption system and the tail gas treatment system are sequentially arranged in the shell; the shell comprises a first shell and a second shell, and the first shell is positioned at the front end of the second shell; the first shell comprises a desorption cavity and a device cavity, and the desorption cavity and the device cavity are arranged in the first shell in parallel; the utility model has reasonable design, simple integral structure and strong practicability, and is suitable for mass popularization; the utility model has the advantages of high pollutant removal rate and no secondary pollution; the utility model relates to a rationally, overall structure is simple, and the practicality is stronger, is fit for a large amount of promotions.

Description

Small test equipment for soil thermal desorption

Technical Field

The utility model relates to a soil remediation appurtenance technical field, concretely relates to soil heat desorption lab scale equipment.

Background

Thermal desorption is used as a non-combustion technology, the pollutant treatment range is wide, equipment is movable, the repaired soil can be reused, particularly, the chlorine-containing organic matters can be treated in a non-oxidative combustion mode, dioxin can be prevented from being generated, and the method is widely used for repairing the soil polluted by the organic pollutants. Thermal desorption is a physical separation process that converts a contaminant from one phase to another, and does not have a damaging effect on organic contaminants during remediation. The pollutants are selectively volatilized by controlling the temperature of the thermal desorption system and the retention time of the polluted soil, and chemical reactions such as oxidation, decomposition and the like do not occur.

To further study thermal desorption techniques, thermal desorption tests are typically performed on the soil. However, in the prior art, when a soil thermal desorption lab test is carried out in a laboratory, the following problems are faced:

(1) by adopting a flat plate heating mode, the soil can not reach the preset temperature, and the thermal desorption can not reach the expected effect easily;

(2) a high-temperature oven is adopted for heating, so that tail gas cannot be effectively treated and can be volatilized into a laboratory;

(3) polychlorinated biphenyl and other chlorine-containing compounds are prone to produce dioxins in low temperature processes when damaged by low temperature heat or after high temperature heat damage. Therefore, a special quenching device is required for the treatment of the exhaust gas, so that the temperature of the high-temperature gas is rapidly reduced to 200 ℃ and the generation of dioxin is prevented.

SUMMERY OF THE UTILITY MODEL

To the problem that exists, the utility model provides a soil thermal desorption lab scale equipment, the utility model discloses equipment is used for the laboratory to develop the thermal desorption lab scale experiment, possesses the pollutant removal rate height, can not cause secondary pollution's advantage.

The technical scheme of the utility model is that: a soil thermal desorption small-scale test device comprises a shell, a thermal desorption system and a tail gas treatment system, wherein the thermal desorption system and the tail gas treatment system are sequentially arranged in the shell; the shell comprises a first shell and a second shell, and the first shell is positioned at the front end of the second shell; the first shell comprises a desorption cavity and a device cavity, and the desorption cavity and the device cavity are arranged in the first shell in parallel;

the thermal desorption system comprises a placing frame arranged in the desorption cavity, an electric heater embedded on the side wall of the desorption cavity and used for heating the interior of the desorption cavity, a blower motor device arranged in the device cavity and used for ventilating the desorption cavity, an airflow component arranged in the desorption cavity and connected with the blower motor device and used for ventilating the desorption cavity, and a power supply device arranged in the device cavity and used for supplying power to electrical appliances;

the tail gas treatment system is including setting up the filtration equipment that is used for filtering the dust in the second casing is inside, sets up the condensing equipment who is used for carrying out condensation treatment to waste gas in the second casing to and set up the waste gas treatment equipment who gets rid of pollutant in the second casing is inside to be arranged in to waste gas.

Further, the device also comprises a moving vehicle body used for moving the equipment, and the shell can be movably arranged on the moving vehicle body; the equipment that can be more convenient removes in the in-service use for equipment practicality is stronger.

Further, the placing rack comprises a rotating motor arranged in the desorption cavity, a rotating main rod arranged on the rotating motor and used for rotating, and a plurality of placing disks arranged on the rotating main rod and used for placing the soil to be thermally desorbed; the rack sets up rotating electrical machines, rotatory mobile jib and can realize the horizontal rotation to the rack, can make the soil that awaits measuring on the rack be heated more evenly in the use of reality.

Further, the airflow assembly comprises a drainage tube which penetrates through the device cavity and is arranged in the desorption cavity and used for introducing airflow of the blower motor device into the desorption cavity, and an airflow shell which is arranged in the desorption cavity and used for discharging/blocking the airflow; introduce the air by the drainage tube, cooperation air current shell forms the hot air current at desorption cavity for the soil that awaits measuring is heated more evenly.

Furthermore, the airflow shell is of a box-shaped structure, is mounted on the inner side wall of the desorption cavity through a mounting rod and is positioned on the periphery of the placing frame, and a channel through which airflow can pass is formed by the airflow shell and the inner side wall of the desorption cavity; the bottom of the airflow shell is provided with an air inlet end, and the top of the airflow shell is provided with an exhaust port for exhausting air; the air inlet end is arranged at the bottom, so that the nature of hot air flow per se can be met, the hot air flow rises from the bottom of the desorption cavity, and the design is reasonable.

Further, the row of ports comprises a first row of ports for hot gas flow discharge and a second row of ports for waste discharge; the first exhaust port can introduce air into the desorption cavity from the upper part and form convection with airflow introduced into the desorption cavity from the air inlet end, so that the retention time of hot airflow in the desorption cavity is longer, and the heating is more sufficient; the second row of ports enables the exhaust gases to be discharged more efficiently with the hot gas flow.

Furthermore, a flow distribution device is arranged above the first outlet, and comprises a four-way joint with one end connected with the drainage tube and three exhaust cylinders respectively connected to the other three ports of the four-way joint; the three exhaust cylinders are funnel-shaped, and electromagnetic valves are arranged at the joints of the exhaust cylinders and the four-way port; two of the three exhaust cylinders are respectively arranged transversely and vertically downwards, and the exhaust ports of the vertical exhaust cylinders are positioned at the first exhaust port; the exhaust funnel is respectively controlled to be opened and closed through the electromagnetic valve, and multiple selections of airflow inside the desorption cavity can be realized: one is as follows: independently ventilating an exhaust funnel which is vertically and downwards arranged in the longitudinal direction to enable airflow in the desorption cavity to flow from top to bottom; the second step is as follows: the two transversely arranged exhaust cylinders are ventilated, so that airflow in the desorption cavity can flow from bottom to top; and thirdly: the three exhaust pipes are simultaneously ventilated, so that the convection of air flow in the desorption cavity can be realized, and the retention time of the air flow is prolonged.

Compared with the prior art, the utility model discloses beneficial effect:

1. the utility model discloses put the soil that will restore after the preliminary treatment to thermal desorption furnace intracavity and carry out thermal desorption processing, the waste gas of production is derived through overflow mouth and fan effect, and waste gas exit sets up the filter screen in order to filter the dust, and then the gas gets into condensing equipment and condenses, controls flue gas temperature, sends into the active carbon adsorber at last or adopts the UV photodissociation method further to get rid of the pollutant in the waste gas; the utility model has the advantages of high pollutant removal rate and no secondary pollution;

2. the utility model carries out condensation treatment on the waste gas after filtering the waste gas, and can effectively reduce the temperature of the waste gas; the waste gas is rapidly condensed, so that the generation of dioxin can be effectively prevented;

3. the utility model relates to a rationally, overall structure is simple, and the practicality is stronger, is fit for a large amount of promotions.

Drawings

Fig. 1 is an external structural schematic diagram of embodiment 1 of the present invention;

fig. 2 is a schematic view of the internal structure of embodiment 1 of the present invention;

fig. 3 is a front sectional view of embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of embodiment 2 of the present invention;

the device comprises a shell 1, a shell 11, a first shell, a desorption cavity 111, a channel 1110, a device cavity 112, a second shell 12, a thermal desorption system 2, a placing frame 21, a rotating motor 211, a rotating main rod 212, a placing frame 213, an electric heater 22, a blower motor device 23, an airflow component 24, a drainage tube 241, an airflow shell 242, an air inlet end 2420, a first discharge port 2421, a second discharge port 2422, a tail gas treatment system 3, a filtering device 31, a condensing device 32, a waste gas treatment device 33, a movable vehicle body 4 and a shunting device 5.

Detailed Description

Example 1: as shown in fig. 1 and 2, the soil thermal desorption small scale test device comprises a shell 1, and a thermal desorption system 2 and a tail gas treatment system 3 which are sequentially arranged in the shell 1; the shell 1 comprises a first shell 11 and a second shell 12, wherein the first shell 11 is positioned at the front end of the second shell 12; the first shell 11 comprises a desorption cavity 111 and a device cavity 112, and the desorption cavity 111 and the device cavity 112 are arranged in the first shell 11 in parallel; a box door is movably arranged at the front end of the desorption cavity 111;

as shown in fig. 2 and 3, the thermal desorption system 2 includes a placing rack 21 disposed inside the desorption cavity 111, an electric heater 22 embedded on a side wall of the desorption cavity 111 for heating the inside of the desorption cavity 111, a blower motor device 23 disposed inside the device cavity 112 for ventilating the desorption cavity 111, an airflow component 24 disposed inside the desorption cavity 111 and connected to the blower motor device 23 for ventilating the desorption cavity 111, and a power supply device disposed inside the device cavity 112 for providing power to an electrical appliance; wherein, the electric heater 22 and the blower motor device 23 are commercially available;

as shown in fig. 2 and 3, the placing rack 21 includes a rotating motor 211 disposed inside the desorption chamber 111, a rotating main rod 212 disposed on the rotating motor 211 for rotation, and 4 placing disks 213 disposed on the rotating main rod 212 for placing the soil to be thermally desorbed;

as shown in fig. 3, the gas flow assembly 24 includes a draft tube 241 installed in the desorption chamber 111 through the device chamber 112 for introducing the gas flow of the blower motor device 23 into the desorption chamber 111, and a gas flow housing 242 installed in the desorption chamber 111 for exhausting/blocking the gas flow;

as shown in fig. 3, the airflow shell 242 is a box-shaped structure, the airflow shell 242 is mounted on the inner side wall of the desorption cavity 111 through a mounting rod, the airflow shell 242 is located at the periphery of the placing frame 21, and the airflow shell 242 and the inner side wall of the desorption cavity 111 form a channel 1110 through which airflow can pass; the bottom of the airflow housing 242 is provided with an air inlet 2420, and the top of the airflow housing 242 is provided with an exhaust port for exhausting air.

As shown in fig. 3, the exhaust ports include a first exhaust port 2421 for hot gas flow exhaust, and a second exhaust port 2422 for waste exhaust;

as shown in fig. 3, a flow dividing device 5 is arranged above the first vent 2421, and the flow dividing device 5 comprises a four-way joint, one end of which is connected with the drainage tube 241, and three exhaust cylinders which are respectively connected to the other three ports of the four-way joint; the three exhaust cylinders are funnel-shaped, and electromagnetic valves are arranged at the joints of the exhaust cylinders and the four-way port; two of the three exhaust cylinders are respectively arranged transversely and vertically downwards, and the exhaust ports of the vertical exhaust cylinders are positioned at the first exhaust port 2421;

as shown in fig. 2, the exhaust gas treatment system 3 includes a filtering device 31 disposed inside the second casing 12 for filtering dust, a condensing device 32 disposed inside the second casing 12 for condensing exhaust gas, and an exhaust gas treatment device 33 disposed inside the second casing 12 for removing pollutants in the exhaust gas; wherein, the filtering device 31 specifically adopts a filter screen sold in the market for filtering dust; the condensing device 32 is a commercial condensing heat exchanger; the exhaust gas treatment device 33 is specifically a commercially available activated carbon adsorber and UV photolysis device.

It should be noted that: in the present embodiment, the control of the electrical appliance is performed by using a commercially available circuit board provided with a switch, which will not be described in too much detail herein.

When the soil desorption device is used, soil to be treated is placed on the placing rack 213, and the temperature inside the desorption cavity 111 is raised by heating through the electric heater 22; air flow is formed inside the desorption cavity 111 by the aid of the blower motor device 23 and the air flow component 24, soil to be detected is uniformly heated, air carrying heat passes through the channel 1110, enters the desorption cavity 111 from the lower end part of the desorption cavity 111 through the air inlet end 2420, generated waste gas is discharged from the second exhaust port 2422, enters the tail gas treatment system 3 through the guide pipe, and is sequentially subjected to filtering treatment by the filtering device 31, condensation treatment by the condensation device 32 and pollutant removal treatment by the waste gas treatment device 33 and then is discharged.

Example 2: the difference from example 1 is: the device also comprises a movable vehicle body 4 for moving the device, and the shell 1 can be movably arranged on the movable vehicle body 4.

Claims (7)

1. A soil thermal desorption small test device comprises a shell (1), and a thermal desorption system (2) and a tail gas treatment system (3) which are sequentially arranged in the shell (1); the method is characterized in that: the shell (1) comprises a first shell (11) and a second shell (12), wherein the first shell (11) is positioned at the front end of the second shell (12); the first shell (11) comprises a desorption cavity (111) and a device cavity (112), and the desorption cavity (111) and the device cavity (112) are arranged in the first shell (11) in parallel;

the thermal desorption system (2) comprises a placing frame (21) arranged inside the desorption cavity (111), an electric heater (22) which is embedded on the side wall of the desorption cavity (111) and used for heating the inside of the desorption cavity (111), a blower motor device (23) which is arranged inside the device cavity (112) and used for ventilating the desorption cavity (111), an air flow component (24) which is arranged inside the desorption cavity (111) and connected with the blower motor device (23) and used for ventilating the desorption cavity (111), and a power supply device which is arranged inside the device cavity (112) and used for providing power for electrical appliances;

the tail gas treatment system (3) comprises a filtering device (31) arranged inside the second shell (12) and used for filtering dust, a condensing device (32) arranged inside the second shell (12) and used for condensing waste gas, and a waste gas treatment device (33) arranged inside the second shell (12) and used for removing pollutants in the waste gas.

2. A soil thermal desorption lab scale in accordance with claim 1 further comprising a mobile body (4) for movement of the apparatus, the housing (1) being movably mounted on said mobile body (4).

3. A soil thermal desorption laboratory apparatus according to claim 1, characterized in that the placing frame (21) comprises a rotating motor (211) arranged inside the desorption cavity (111), a rotating main rod (212) arranged on the rotating motor (211) for rotation, and a plurality of placing discs (213) arranged on the rotating main rod (212) for placing the soil to be thermally desorbed.

4. A soil thermal desorption bench set forth in claim 1 wherein the gas flow assembly (24) comprises a draft tube (241) mounted in the desorption chamber (111) through the device chamber (112) for introducing the gas flow of the blower motor device (23) into the desorption chamber (111) and a gas flow housing (242) mounted in the desorption chamber (111) for exhausting/baffling the gas flow.

5. The soil thermal desorption lab scale of claim 4, wherein the airflow shell (242) is of a box-shaped structure, the airflow shell (242) is installed on the inner side wall of the desorption cavity (111) through a mounting rod, the airflow shell (242) is located at the periphery of the placing frame (21), and the airflow shell (242) and the inner side wall of the desorption cavity (111) form a channel (1110) for airflow to pass through; an air inlet end (2420) is arranged at the bottom of the air flow shell (242), and an exhaust port for exhausting air is arranged at the top of the air flow shell (242).

6. A soil thermal desorption lab scale in accordance with claim 5 wherein the vents comprise a first vent (2421) for hot gas flow discharge and a second vent (2422) for waste discharge.

7. A soil thermal desorption lab scale according to claim 6, wherein a flow dividing device (5) is arranged above the first row of ports (2421), the flow dividing device (5) comprises a four-way pipe with one end connected with the drainage pipe (241) and three exhaust hoods respectively connected with the other three ports of the four-way pipe; the three exhaust cylinders are funnel-shaped, and electromagnetic valves are arranged at the joints of the exhaust cylinders and the four-way port; two of the three exhaust cylinders are respectively transversely arranged and vertically and downwards arranged, and the exhaust port of the vertical exhaust cylinder is positioned at the first exhaust port (2421).

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