Thermal desorption device for organic contaminated soil

Abstract

The utility model belongs to the field of thermal desorption devices, particularly relates to a thermal desorption device for organic contaminated soil, and provides the following scheme aiming at the problems that dust and pollutants adsorbed on the inner wall of a tank body cannot be effectively removed by an existing device, and the complexity and the cost of manual cleaning are increased. The device comprises a crushing and screening tank, a rotary kiln, a cyclone dust collector, a secondary combustion chamber, a quench tower, a bag-type dust collector and a tank body, wherein the top of the tank body is fixedly communicated with a chimney; the spraying assembly is arranged on the tank body and is used for reducing dust and pollutants in the gas; the cleaning assembly is arranged on the tank body and is used for cleaning dust and pollutants adsorbed on the inner wall of the tank body. Through the arrangement of the cleaning assembly, dust and pollutants adsorbed on the inner wall can be effectively removed, the cleaning efficiency of the tank body and the maintenance quality of the internal environment are remarkably improved, and the complexity and cost of manual cleaning are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal desorption devices, in particular to a thermal desorption device for organically contaminated soil. Background Technique

[0002] The thermal desorption device for organically contaminated soil is a technical equipment specially used for treating soil contaminated by organic pollutants. It heats the soil to a certain temperature, so that the organic pollutants in the soil change from the solid phase to the gas phase, and then are carried away from the soil by the air flow, thereby realizing the removal of pollutants and the purification of the soil.

[0003] At present, the existing thermal desorption devices for organically contaminated soil cannot effectively remove the dust and pollutants adsorbed on the inner wall of the tank, reducing the cleaning efficiency of the tank and the maintenance quality of the internal environment, and increasing the complexity and cost of manual cleaning. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in the prior art, the dust and pollutants adsorbed on the inner wall of the tank cannot be effectively removed, increasing the complexity and cost of manual cleaning, and to provide a thermal desorption device for organically contaminated soil.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A thermal desorption device for organically contaminated soil, comprising:

[0007] A crushing and screening tank, a rotary kiln, a cyclone dust collector, a secondary combustion chamber, a quench tower, a bag filter and a tank body, and a chimney is fixedly communicated with the top of the tank body;

[0008] A spraying assembly, which is arranged on the tank body and is used for reducing the dust and pollutants in the gas;

[0009] A cleaning assembly, which is arranged on the tank body and is used for cleaning the dust and pollutants adsorbed on the inner wall of the tank.

[0010] In a possible design, the spraying assembly includes a mounting frame fixedly arranged inside the tank body, a spraying pipe fixedly arranged at the top of the mounting frame, a plurality of uniformly distributed atomizing nozzles fixedly communicated with the bottom of the spraying pipe in a circle, a water pump fixedly arranged outside the tank body, a water supply pipe fixedly communicated with the output end of the water pump, one end of the water supply pipe hermetically penetrates the tank body and is hermetically connected with the spraying pipe, and a connecting pipe is fixedly communicated with the input end of the water pump.

[0011] In a possible design, the cleaning component includes a fixed frame fixedly arranged inside the tank body above the mounting frame. A rotating rod is rotatably arranged at the center of the fixed frame. One end of the rotating rod below the fixed frame is fixedly provided with a rotating frame. Scraping bars are fixedly arranged on both sides of the rotating frame, and the two scraping bars are in contact with the inner wall of the tank body. One end of the rotating rod above the fixed frame is fixedly provided with a driven bevel gear. A motor is fixedly arranged outside the tank body. One end of the output shaft of the motor is fixedly provided with a connecting rod. One end of the connecting rod rotatably penetrates through one side of the tank body and extends into its interior. One end of the connecting rod located inside the tank body is fixedly provided with a driving bevel gear, and the driving bevel gear is in meshing transmission with the driven bevel gear.

[0012] In a possible design, a chute is provided on one side of the tank body. A connecting frame is detachably and sealingly slidably arranged inside the chute. A filter screen is fixedly arranged on the ring of the connecting frame, and a handle is fixedly arranged on the outside of the connecting frame.

[0013] In a possible design, a drain pipe is fixedly communicated below the connecting frame on one side of the tank body, and a manual valve is arranged on the drain pipe.

[0014] In a possible design, the crushing and screening tank is communicated with the rotary kiln through a conveying device. The rotary kiln is communicated with a cyclone dust collector. The cyclone dust collector is communicated with a secondary combustion chamber. The secondary combustion chamber is communicated with a quenching tower. The quenching tower is communicated with a bag filter. The bag filter is communicated with the tank body.

[0015] In this application, when starting to use, first connect the power supply to the entire organic contaminated soil thermal desorption device. Subsequently, make corresponding connections to the water source and container that need to be connected. Then, send the organic contaminated soil to be treated into the crushing and screening tank. Through mechanical crushing and screening, the soil particles are refined and large impurities are removed to facilitate subsequent thermal desorption treatment. The pretreated soil enters the rotary kiln through the conveying equipment. During the conveying process of the pretreated soil, an appropriate amount of quicklime is added. By mixing in the quicklime, the moisture content of the soil can be reduced and the thermal desorption efficiency can be improved. Inside the rotary kiln, the soil is evenly heated to a certain temperature (usually several hundred degrees to over a thousand degrees), causing the organic pollutants in the soil to volatilize and form flue gas containing pollutants. The flue gas then enters the cyclone dust collector. During this process, most of the large particle dust and heavier pollutant particles are separated due to inertia and fall into the dust collection hopper at the bottom of the cyclone dust collector. The flue gas treated by the cyclone dust collector enters the secondary combustion chamber. In the secondary combustion chamber, by supplementing fuel and air, the unburned pollutants are further burned to ensure the complete decomposition of the pollutants. The high-temperature flue gas after combustion enters the quench tower and rapidly cools down in the quench tower to prevent the harmful substances in the flue gas from recombining or forming secondary pollutants during the cooling process. The flue gas after the quenching treatment enters the bag filter. The bag filter uses the filtering effect of the filter bags to further remove the fine dust and particulate matter in the flue gas and improve the purification efficiency of the gas;

[0016] The purified gas finally enters the tank for final treatment. Inside the tank, the spraying assembly is started. The water pump sucks in the external water source through the connecting pipe and then sends the water source into the spraying pipe through the water supply pipe. The water source sent into the spraying pipe is then sprayed into fine water mist by the atomizing nozzles and comes into full contact with the gas entering the tank, further reducing the dust and pollutant concentration in the gas. During the operation of the tank, the cleaning assembly is automatically started. The motor drives the connecting rod to rotate. While the connecting rod rotates, it drives the driving bevel gear to rotate. Then, through meshing transmission, the driving bevel gear and the driven bevel gear cause the rotating rod to rotate. While the rotating rod rotates, it drives the rotating frame to rotate synchronously. While the rotating frame rotates, the scraping bars on both sides of it rotate on the inner wall of the tank to scrape off the dust and pollutants adsorbed on the inner wall. The scraped dust and pollutants will fall into the filter screen for collection. Periodically, take out the connecting frame from the sliding groove through the handle to clean or replace the filter screen to maintain its filtering effect. The water after spraying will leak through the filter screen to the bottom of the tank. A manual valve is provided on the drain pipe at the bottom of the tank, and the valve can be opened as needed to drain the accumulated liquid in the tank, facilitating the maintenance and cleaning of the equipment;

[0017] After the treatment by the spraying assembly and the cleaning assembly in the tank, the dust and pollutant concentration in the gas has been greatly reduced and reaches the emission standard. Finally, the purified gas is discharged into the atmosphere through the chimney at the top of the tank.

[0018] The utility model has the following beneficial effects:

[0019] In the present utility model, through the arrangement of the spraying assembly, the water pump sucks the external water source through the connecting pipe, and then sends the water source into the spraying pipe through the water supply pipe. The water source sent into the spraying pipe is then sprayed into fine water mist by the atomizing nozzles, which fully contacts with the gas entering the tank body, enhancing the contact area and efficiency between the water mist and the gas in the tank body. Thus, the concentration of dust and pollutants in the gas is effectively reduced, realizing the efficient purification treatment of the gas and ensuring the cleanliness and environmental protection of the subsequent process or emission.

[0020] In the present utility model, through the arrangement of the cleaning assembly, the motor drives the connecting rod to rotate. While the connecting rod rotates, it drives the active bevel gear to rotate. Then, through the meshing transmission between the active bevel gear and the driven bevel gear, the rotating rod rotates. While the rotating rod rotates, it drives the rotating frame to rotate synchronously. While the rotating frame rotates, the scraping strips on both sides of it rotate on the inner wall of the tank body, effectively removing the dust and pollutants adsorbed on the inner wall, significantly improving the cleaning efficiency of the tank body and the maintenance quality of the internal environment, and reducing the complexity and cost of manual cleaning.

[0021] In the present utility model, through the arrangement of the cleaning assembly, the dust and pollutants adsorbed on the inner wall can be effectively removed, significantly improving the cleaning efficiency of the tank body and the maintenance quality of the internal environment, and reducing the complexity and cost of manual cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall front view structural schematic diagram of an organic contaminated soil thermal desorption device proposed by the present utility model;

[0023] Figure 2 is the overall side view structural schematic diagram of an organic contaminated soil thermal desorption device proposed by the present utility model;

[0024] Figure 3 is the structural schematic diagram of the connecting frame being pulled out of an organic contaminated soil thermal desorption device proposed by the present utility model;

[0025] Figure 4 is the sectional view structural schematic diagram of the tank body of an organic contaminated soil thermal desorption device proposed by the present utility model.

[0026] In the figure: 1, crushing and screening tank; 2, rotary kiln; 3, cyclone dust collector; 4, secondary combustion chamber; 5, quench tower; 6, bag filter; 7, tank body; 8, chimney; 9, water pump; 10, water supply pipe; 11, connecting pipe; 12, mounting frame; 13, spraying pipe; 14, atomizing nozzle; 15, fixing frame; 16, rotating rod; 17, rotating frame; 18, scraping strip; 19, driven bevel gear; 20, connecting rod; 21, active bevel gear; 22, motor; 23, drain pipe; 24, manual valve; 25, connecting frame; 26, filter screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0028] Embodiment 1

[0029] Refer to Figures 1-4 , a thermal desorption device, comprising:

[0030] A crushing and screening tank 1, a rotary kiln 2, a cyclone dust collector 3, a secondary combustion chamber 4, a quenching tower 5, a bag filter 6 and a tank body 7. Each component is connected in sequence through pipelines or connectors. Specifically, the crushing and screening tank 1 initially crushes and screens the contaminated soil, and the treated soil enters the rotary kiln 2 for high-temperature thermal desorption treatment. The gas generated during the thermal desorption process sequentially passes through the cyclone dust collector 3 to remove large particulate dust, and the secondary combustion chamber 4 conducts secondary combustion to treat harmful substances. The quenching tower 5 rapidly cools down to prevent the re-synthesis of harmful substances. Finally, after further purification by the bag filter 6, it enters the tank body 7 for final gas treatment.

[0031] A chimney 8 is fixed at the top of the tank body 7 for discharging the treated gas. An installation rack 12 is installed inside the tank body 7, on which a spray pipe 13 is fixed. A plurality of atomizing nozzles 14 are evenly distributed at the bottom of the spray pipe 13 for spraying water mist to reduce the dust and pollutants in the gas. A water pump 9 is provided outside the tank body 7 and is connected to the spray pipe 13 through a water supply pipe 10 to provide the water source required for spraying. The input end of the water pump 9 is connected to an external water source through a connecting pipe 11.

[0032] In order to clean the dust and pollutants adhering to the inner wall of the tank body 7, a cleaning component is designed. A fixing rack 15 is fixed above the installation rack 12 inside the tank body 7, on which a rotating rod 16 is rotatably arranged. A rotating frame 17 is fixed below the rotating rod 16, and scraping strips 18 are installed on both sides of the rotating frame 17. The scraping strips 18 are in close contact with the inner wall of the tank body 7. As the rotating rod 16 rotates, the scraping strips 18 can effectively scrape off the dust and pollutants on the inner wall. A driven bevel gear 19 is fixed above the rotating rod 16, and a motor 22 outside the tank body 7 drives the driven bevel gear 19 and the rotating rod 16 to rotate through a connecting rod 20 and a driving bevel gear 21.

[0033] This application can be used in the technical field of organic contaminated soil thermal desorption devices, and can also be used in other fields applicable to this application.

[0034] Embodiment 2

[0035] On the basis of the first embodiment, the second embodiment further includes: an organic contaminated soil thermal desorption device, which is applied to the technical field of organic contaminated soil thermal desorption devices. A chute is provided on one side of the tank body 7, and a connecting frame 25 is slidably installed in the chute. A filter screen 26 is fixed on the connecting frame 25 for collecting the scraped dust and pollutants. The connecting frame 25 and the filter screen 26 can be conveniently taken out from the chute through a handle for cleaning.

[0036] A drain pipe 23 is provided at the bottom of the tank body 7, and a manual valve 24 is installed thereon for discharging the accumulated liquid in the tank body 7 to facilitate maintenance and cleaning.

[0037] However, as is well known to those skilled in the art, the working principles and wiring methods of the water pump 9 and the motor 22 are common knowledge, and they both belong to conventional means or well-known common knowledge, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0038] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. An organic contaminated soil thermal desorption device, characterized in that, Comprising: A crushing and screening tank (1), a rotary kiln (2), a cyclone dust collector (3), a secondary combustion chamber (4), a quenching tower (5), a bag filter (6) and a tank body (7). A chimney (8) is fixedly connected to the top of the tank body (7); A spraying assembly which is arranged on the tank body (7) and is used for reducing dust and pollutants in the gas; A cleaning assembly which is arranged on the tank body (7) and is used for cleaning dust and pollutants adsorbed on the inner wall of the tank body (7).

2. The organic contaminated soil thermal desorption device according to claim 1, wherein The spraying assembly includes a mounting frame (12) fixedly arranged inside the tank body (7). A spraying pipe (13) is fixedly arranged at the top of the mounting frame (12). A plurality of uniformly distributed atomizing nozzles (14) are fixedly connected in a circle at the bottom of the spraying pipe (13). A water pump (9) is fixedly arranged on the outer side of the tank body (7). The output end of the water pump (9) is fixedly connected to a water supply pipe (10). One end of the water supply pipe (10) hermetically penetrates through the tank body (7) and is hermetically connected to the spraying pipe (13). The input end of the water pump (9) is fixedly connected to a connecting pipe (11).

3. The thermal desorption device for organic contaminated soil according to claim 1, characterized in that, The cleaning assembly includes a fixing frame (15) fixedly arranged inside the tank body (7) above the mounting frame (12). A rotating rod (16) is rotatably arranged at the center of the fixing frame (15). A rotating frame (17) is fixedly arranged at one end of the rotating rod (16) below the fixing frame (15). Scraping bars (18) are fixedly arranged on both sides of the rotating frame (17). The two scraping bars (18) are in contact with the inner wall of the tank body (7). A driven bevel gear (19) is fixedly arranged at one end of the rotating rod (16) above the fixing frame (15). A motor (22) is fixedly arranged on the outer side of the tank body (7). A connecting rod (20) is fixedly arranged at one end of the output shaft of the motor (22). One end of the connecting rod (20) rotatably penetrates through one side of the tank body (7) and extends into its interior. A driving bevel gear (21) is fixedly arranged at one end of the connecting rod (20) located inside the tank body (7). The driving bevel gear (21) is in meshing transmission with the driven bevel gear (19).

4. The thermal desorption device for organic contaminated soil according to claim 3, characterized in that, A sliding groove is formed in one side of the tank body (7). A connecting frame (25) is detachably and hermetically slidably arranged inside the sliding groove. A filter screen (26) is fixedly arranged in a circle of the connecting frame (25). A handle is fixedly arranged on the outer side of the connecting frame (25).

5. An organic contaminated soil thermal desorption device according to claim 4, wherein, A drain pipe (23) is fixedly connected to one side of the tank body (7) below the connecting frame (25). A manual valve (24) is arranged on the drain pipe (23).

6. The thermal desorption device for organic contaminated soil according to claim 1, wherein The crushing and screening tank (1) is communicated with the rotary kiln (2) through a conveying device. The rotary kiln (2) is communicated with the cyclone dust collector (3). The cyclone dust collector (3) is communicated with the secondary combustion chamber (4). The secondary combustion chamber (4) is communicated with the quenching tower (5). The quenching tower (5) is communicated with the bag filter (6). The bag filter (6) is communicated with the tank body (7).

Images