Polluted soil incineration remediation equipment

Abstract

The invention relates to polluted soil incineration remediation equipment. Comprising a double-layer incineration box, the double-layer incineration box comprises an upper-layer incineration box body and a lower-layer incineration box body, a conveying auger driven by an upper-layer driving motor is installed in the upper-layer incineration box body, and a conveying auger driven by a lower-layer driving motor is installed in the lower-layer incineration box body; an upper-layer feeding box with a soil inlet in the top is arranged at the tail end of the upper-layer incineration box, an upper-layer discharging box is arranged at the bottom of the head end of the upper-layer incineration box, a lower-layer discharging box with a soil outlet in the bottom is arranged at the tail end of the lower-layer incineration box, a lower-layer feeding box is arranged at the top of the head end of the lower-layer incineration box, and the upper-layer discharging box is in butt joint with the lower-layer feeding box. The upper-layer incineration box and the lower-layer incineration box are located in the heat preservation outer box body, and a plurality of combustors are installed on the side wall of the heat preservation outer box body. The hot air flow transferring assembly is used for guiding high-temperature air flow in the heat preservation outer box body into the upper-layer incineration box and the lower-layer incineration box, and the exhaust assembly is used for guiding waste gas generated after incineration out. Heat energy is fully utilized to reduce the overall energy consumption, and a long circulation path is provided for the contaminated soil to improve the remediation effect.

Description

Technical Field

[0001] The invention belongs to the technical field of soil remediation equipment, and in particular relates to contaminated soil incineration remediation equipment. Background Art

[0002] Ex situ soil remediation is one of the important methods of soil remediation. It refers to the technology of excavating the contaminated soil from the location where the contamination occurred and treating it within the original site or after transportation. Ex situ soil remediation is suitable for treating sites with high pollution concentration, high risk and not large amount of contaminated soil. Direct and effective technical methods can be selected to centrally treat contaminated soil. The treatment is efficient and thorough, and it is easier to control in terms of monitoring, which can reduce monitoring costs.

[0003] For some contaminated soils with high content of organic pollutants, due to the lack of suitable remediation agents and the inability to ensure that the organic pollutants in the contaminated soil react fully through the application of drugs, incineration can be used to treat the contaminated soil. Soil incineration remediation technology is a method of treating contaminated soil through high-temperature incineration. This technology uses high temperature to burn and decompose organic matter and some inorganic matter in the contaminated soil, thereby reducing the content of pollutants in the soil. The principle is to heat the contaminated soil to a high temperature through a high-temperature incinerator, so that the organic matter and some inorganic matter burn and decompose, generating carbon dioxide, water and a small amount of ash, thereby achieving the purpose of purifying the soil.

[0004] The existing incineration remediation equipment has low efficiency in utilizing thermal energy and therefore high energy consumption. The flow path of contaminated soil is short, so it is difficult to ensure the remediation effect, and development and design are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a contaminated soil incineration remediation device, which fully utilizes thermal energy to reduce overall energy consumption and provides a longer flow path for the contaminated soil to improve the remediation effect.

[0006] The technical solution adopted by the present invention is: a contaminated soil incineration and remediation equipment, including a double-layer incineration box, the double-layer incineration box includes an upper incineration box and a lower incineration box, a conveying auger driven by an upper driving motor is installed inside the upper incineration box, and a conveying auger driven by a lower driving motor is installed inside the lower incineration box, an upper feed box with a soil inlet on the top is provided at the end of the upper incineration box, and an upper discharge box is provided at the bottom of the head end, a lower discharge box with a soil outlet on the bottom is provided at the end of the lower incineration box, and a lower feed box is provided at the top of the head end, the upper discharge box is docked with the lower feed box, and also includes an insulating outer box body, the upper incineration box and the lower incineration box are located inside the insulating outer box body, and multiple burners are installed on the side walls of the insulating outer box body; it also includes a hot air flow transfer component that guides the high-temperature airflow in the insulating outer box body into the upper incineration box and the lower incineration box, and an exhaust component that guides the waste gas after incineration.

[0007] Preferably, the longitudinal sections of the upper incineration box and the lower incineration box are both elliptical in shape, two conveying augers are installed inside the upper incineration box and the lower incineration box respectively, two upper drive motors are installed outside the upper incineration box, and two lower drive motors are installed outside the lower incineration box.

[0008] Preferably, the multiple burners are divided into two groups, the upper group of burners is installed at a height flush with the horizontal center plane of the upper incineration box, and the lower group of burners is installed at a height flush with the horizontal center plane of the lower incineration box.

[0009] Preferably, the hot air flow transfer component includes a hot air flow pipe, an upper hot air flow inlet is provided at the head end of the upper incineration box, and a lower hot air flow inlet is provided at the end of the lower incineration box. The air flow inlet located in the middle of the hot air flow pipe is connected to the air flow outlet arranged on the thermal insulation outer box body, and the two ends of the hot air flow pipe are respectively connected to the upper hot air flow inlet and the lower hot air flow inlet.

[0010] Preferably, the exhaust assembly includes a waste gas exhaust pipe installed at the top end of the upper incineration box, the waste gas exhaust pipe passes through the top wall of the insulating outer box body, and a waste gas pipeline is installed on the waste gas exhaust pipe, and the waste gas pipeline is connected to the subsequent waste gas treatment facility.

[0011] Preferably, heat-conducting ribs are provided on the outer walls of the upper incineration box and the lower incineration box, and the heat-conducting ribs include strip ribs fixed on the outer wall of the incineration box and extending in the axial direction, and annular ribs fixed on the outer wall of the incineration box and extending in the circumferential direction.

[0012] Preferably, it further comprises a high-level conveyor and a low-level conveyor, wherein the end of the high-level conveyor is located above the soil inlet, and the head end of the low-level conveyor is located below the soil outlet.

[0013] Preferably, it also includes a supporting frame, the insulating outer box body is installed and fixed on the top of the supporting frame, and support seats are provided at the bottom front and bottom rear of the lower incineration box. The top of the support seat is fixedly connected to the bottom of the lower incineration box, the middle part passes through the bottom wall of the insulating outer box body, and the bottom is fixedly connected to the supporting frame.

[0014] The advantages and positive effects of the present invention are:

[0015] The present invention provides a contaminated soil incineration and remediation device. Compared with the existing contaminated soil incineration and remediation device, the remediation device in the present invention is provided with an upper incineration box and a lower incineration box, and the contaminated soil entering the upper incineration box is laterally transported and moved, and then enters the lower incineration box through the upper discharge box and the lower feed box, and is laterally transported and moved again, and is incinerated in the process. Therefore, the present invention provides a longer flow path for the contaminated soil, and improves the effect of incineration and remediation.

[0016] On the other hand, in the present invention, the upper incineration box and the lower incineration box are placed inside the heat-insulating outer box and a burner is used to heat the upper incineration box and the lower incineration box. The high-temperature airflow in the heat-insulating outer box is transferred to the interior of the upper incineration box and the lower incineration box by a hot airflow transfer component. The stable high-temperature airflow further heats the contaminated soil while circulating in the incineration box and takes away the exhaust gas after incineration. Therefore, the present invention makes full use of thermal energy and reduces overall energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main perspective structure of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the double-layer incineration box.

[0019] In the figure:

[0020] 1. Support frame; 2. Lower layer driving motor; 3. Upper layer driving motor; 4. Upper layer hot air flow inlet; 5. Hot air flow pipeline; 6. Support seat; 7. Burner; 8. Lower layer incineration box; 9. Soil outlet; 10. Low-level conveyor; 11. Lower layer hot air flow inlet; 12. Upper layer incineration box; 13. Insulated outer box; 14. Exhaust gas pipeline; 15. Exhaust gas discharge pipe; 16. Soil inlet; 17. High-level conveyor; 18. Upper layer feed box; 19. Lower layer discharge box; 20. Upper layer discharge box; 21. Lower layer feed box; 22. Heat-conducting rib plate; 23. Conveying auger. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the present invention, the following embodiments are given to explain in detail.

[0022] See also Figure 1 and Figure 2 The contaminated soil incineration and remediation equipment of the present invention includes a double-layer incineration box, which provides a double-layer circulation channel for the contaminated soil. The contaminated soil is fed in from the upper entrance, then enters the lower layer through the inter-box channel, and is finally discharged from the lower outlet, so that the contaminated soil has a longer flow path to ensure the treatment effect. It is worth noting that the "incineration" referred to in the present invention does not mean that the flame directly contacts the contaminated soil, but refers to the flow of soil inside the double-layer incineration box. The flame acts on the side wall of the double-layer incineration box to raise the side wall of the double-layer incineration box to a high temperature condition, and the contaminated soil continues to contact the high-temperature box wall during the circulation process, achieving the effect of decomposing organic pollutants and some inorganic pollutants.

[0023] The double-layer incineration box includes an upper incineration box 12 and a lower incineration box 8. A conveying auger 23 driven by an upper drive motor 3 is installed inside the upper incineration box 12, and a conveying auger 23 driven by a lower drive motor 2 is installed inside the lower incineration box 8. In this embodiment, the longitudinal sections of the upper incineration box 12 and the lower incineration box 8 are both elliptical, and two conveying augers 23 are respectively installed inside the upper incineration box 12 and the lower incineration box 8. Correspondingly, two upper drive motors 3 are installed outside the upper incineration box 12, and two lower drive motors 2 are installed outside the lower incineration box 8. Among them, the conveying auger 23 of the upper incineration box 12 transports the contaminated soil entering the box from right to left, and the conveying auger 23 of the lower incineration box 8 transports the contaminated soil entering the box from left to right.

[0024] At the end of the upper incineration box 12, an upper feed box 18 with a soil inlet 16 at the top and an upper discharge box 20 at the bottom of the head end are provided. At the end of the lower incineration box 8, a lower discharge box 19 with a soil outlet 9 at the bottom and a lower feed box 21 at the top of the head end are provided. The upper discharge box 20 is connected with the lower feed box 21. The flow path of the contaminated soil is: entering the upper feed box 18 through the soil inlet 16, under the action of the conveying auger 23, the contaminated soil moves horizontally from the end to the head end in the upper incineration box 12, and falls into the upper discharge box 20 when reaching the head end, and then enters the lower incineration box 8 through the lower feed box 21. Under the action of the conveying auger 23, the contaminated soil moves horizontally from the head end to the end in the lower incineration box 8, and finally enters the lower discharge box 19 and is discharged downward from the soil outlet 9 to the outside.

[0025] In this embodiment, a high-level conveyor 17 and a low-level conveyor 10 are also included, the end of the high-level conveyor 17 is located above the soil inlet 16, and the head end of the low-level conveyor 10 is located below the soil outlet 9. The high-level conveyor 17 is used to deliver the contaminated soil to the upper feed box 18 through the soil inlet 16, and the low-level conveyor 10 is used to receive the treated contaminated soil from the soil outlet 9 and transfer the treated soil to the storage yard.

[0026] It also includes an insulation outer box 13, an upper incineration box 12 and a lower incineration box 8 are located inside the insulation outer box 13, and a plurality of burners 7 are installed on the side wall of the insulation outer box 13. Each burner 7 generates a high-temperature incineration flame inside the insulation outer box 13, and the flame heats the upper incineration box 12 and the lower incineration box 8 to raise the temperature of the box wall to a high temperature condition, thereby promoting the decomposition of organic pollutants and some inorganic pollutants in the contaminated soil in the box.

[0027] In this embodiment, the multiple burners 7 are divided into two groups, the upper group of burners 7 is installed at a height flush with the horizontal center plane of the upper incineration box 12, and the lower group of burners 7 is installed at a height flush with the horizontal center plane of the lower incineration box 8.

[0028] In this embodiment, heat-conducting ribs 22 are provided on the outer walls of the upper incineration box 12 and the lower incineration box 8. The heat-conducting ribs 22 include strip ribs fixed on the outer wall of the incineration box and extending in the axial direction, and annular ribs fixed on the outer wall of the incineration box and extending in the circumferential direction. The heat-conducting ribs 22 have two functions: one is to improve the overall structural strength of the upper incineration box 12 and the lower incineration box 8, and the other is to increase the contact area with the flame generated by the burner 7 to improve the heat exchange and heating effect.

[0029] It also includes a hot air flow transfer component that guides the high-temperature airflow in the heat-insulating outer box 13 into the upper incineration box 12 and the lower incineration box 8, and an exhaust component that guides the waste gas after incineration. Under the action of the hot air flow transfer component, when the high-temperature hot air flow enters the upper incineration box 12 and the lower incineration box 8, it suddenly provides a further temperature increase effect on the pollution in the box, and the flowing hot air flow brings out the waste gas generated by the decomposition of the pollutants. The exhaust component guides the waste gas out of the repair equipment and transports it to the waste gas treatment facility.

[0030] In this embodiment, the hot air flow transfer component includes a hot air flow pipeline 5, an upper hot air flow inlet 4 is provided at the head end of the upper incineration box 12, and a lower hot air flow inlet 11 is provided at the end of the lower incineration box 8. The air flow inlet located in the middle of the hot air flow pipeline 5 is connected to the air flow outlet arranged on the insulation outer box body 13, and the two ends of the hot air flow pipeline 5 are respectively connected to the upper hot air flow inlet 4 and the lower hot air flow inlet 11.

[0031] The high-temperature hot air flow generated by the burner 7 inside the insulating outer box 13 is discharged through the air flow outlet at the top of the insulating outer box 13, and enters the hot air flow pipeline 5, and enters the upper incineration box 12 and the lower incineration box 8 through the upper hot air flow inlet 4 and the lower hot air flow inlet 11. The hot air flow entering the upper incineration box 12 flows from the head end to the tail end in the upper part of the inner cavity of the upper incineration box 12, and the hot air flow entering the lower incineration box 8 flows from the tail end to the head end in the upper part of the inner cavity of the lower incineration box 8, and then goes up through the channel formed by the upper discharge box 20 and the lower feed box 21 to enter the upper incineration box 12, and mixes with the hot air flow injected into the upper incineration box 12.

[0032] In this embodiment, the exhaust assembly includes a waste gas exhaust pipe 15 installed at the top end of the upper incineration box 12. The waste gas exhaust pipe 15 passes through the top wall of the insulation outer box 13. A waste gas pipe 14 is installed on the waste gas exhaust pipe 15. The waste gas pipe 14 is connected to subsequent waste gas treatment facilities, such as waste gas activated carbon adsorption, waste gas spray cleaning tower and other treatment facilities.

[0033] In this embodiment, a support frame 1 is also included, and an insulation outer box body 13 is installed and fixed on the top of the support frame 1. A support seat 6 is provided at the bottom front and bottom rear of the lower incineration box 8. The top of the support seat 6 is fixedly connected to the bottom of the lower incineration box 8, the middle part is passed through the bottom wall of the insulation outer box body 13, and the bottom is fixedly connected to the support frame 1. The support frame 1 provides high-position support for the main body of the equipment, and the support seat 6 provides auxiliary support for the double-layer incineration box to improve the overall structural strength of the equipment.

[0034] Running process:

[0035] The burner 7 is running, generating a combustion flame inside the heat-insulating outer box 13, and the combustion flame acts on the side walls of the upper incineration box 12 and the lower incineration box 8, raising the box walls of the upper incineration box 12 and the lower incineration box 8 to a high temperature condition;

[0036] The high-level conveyor 17 delivers the contaminated soil from the soil inlet 16 to the upper feed box 18. Under the action of the conveying auger 23, the contaminated soil in the box is transported from the end of the upper incineration box 12 to the head end. During the movement, the conveying auger 23 also provides a stirring effect on the contaminated soil. After reaching the head end, it falls into the head end of the lower incineration box 8 through the channel formed by the upper discharge box 20 and the lower feed box 21. Under the action of the conveying auger 23, the contaminated soil in the box is transported from the head end of the lower incineration box 8 to the end. During the movement, the conveying auger 23 also provides a stirring effect on the contaminated soil. Finally, the contaminated soil reaches the lower discharge box 19, and is finally discharged from the soil outlet 9, falls on the low-level conveyor 10, and is transported and transferred to the subsequent storage yard.

[0037] In the aforementioned process, the high-temperature hot air flow in the heat-insulating outer box 13 enters the upper incineration box 12 and the lower incineration box 8 through the hot air flow pipeline 5, the upper hot air flow inlet 4 and the lower hot air flow inlet 11. This part of the hot air flow further heats the contaminated soil in the box, and at the same time mixes with the waste gas generated after the decomposition of the pollutants. The waste gas is finally discharged from the waste gas exhaust pipe 15 and the waste gas pipeline 14 and transported to the subsequent waste gas treatment facilities.

Claims

1. A contaminated soil incineration remediation equipment, characterized by: The invention comprises a double-layer incineration box, wherein the double-layer incineration box comprises an upper incineration box (12) and a lower incineration box (8), wherein a conveying auger (23) driven by an upper driving motor (3) is installed inside the upper incineration box (12), and a conveying auger (23) driven by a lower driving motor (2) is installed inside the lower incineration box (8), an upper feeding box (18) with a soil inlet (16) at the top is provided at the end of the upper incineration box (12), an upper discharging box (20) is provided at the bottom of the head end, and a soil outlet (16) is provided at the bottom of the lower incineration box (8). 9), a lower discharge box (19) is provided at the top of the head end, an upper discharge box (20) is connected to the lower feed box (21), and also includes an insulating outer box (13), an upper incineration box (12) and a lower incineration box (8) are located inside the insulating outer box (13), and a plurality of burners (7) are installed on the side wall of the insulating outer box (13); and also includes a hot air flow transfer component for guiding the high-temperature air flow in the insulating outer box (13) into the upper incineration box (12) and the lower incineration box (8), and an exhaust component for guiding the waste gas after incineration.

2. The contaminated soil incineration remediation equipment according to claim 1, characterized in that: The longitudinal sections of the upper incineration box (12) and the lower incineration box (8) are both elliptical in shape. Two conveying augers (23) are respectively installed inside the upper incineration box (12) and the lower incineration box (8). Two upper drive motors (3) are installed outside the upper incineration box (12), and two lower drive motors (2) are installed outside the lower incineration box (8).

3. The contaminated soil incineration remediation equipment according to claim 2, characterized in that: The plurality of burners (7) are divided into two groups, the upper group of burners (7) is installed at a height flush with the horizontal center plane of the upper incineration box (12), and the lower group of burners (7) is installed at a height flush with the horizontal center plane of the lower incineration box (8).

4. The contaminated soil incineration remediation equipment according to claim 3 is characterized by: The hot air flow transfer component comprises a hot air flow pipeline (5), an upper hot air flow inlet (4) is provided at the head end of the upper incineration box (12), a lower hot air flow inlet (11) is provided at the end of the lower incineration box (8), the air flow inlet located in the middle of the hot air flow pipeline (5) is connected to the air flow outlet arranged on the heat-insulating outer box (13), and the two ends of the hot air flow pipeline (5) are respectively connected to the upper hot air flow inlet (4) and the lower hot air flow inlet (11).

5. The contaminated soil incineration remediation equipment according to claim 4, characterized in that: The exhaust assembly comprises a waste gas exhaust pipe (15) installed at the top end of the upper incineration box (12), the waste gas exhaust pipe (15) passes through the top wall of the heat-insulating outer box body (13), and a waste gas pipeline (14) is installed on the waste gas exhaust pipe (15), and the waste gas pipeline (14) is connected to the subsequent waste gas treatment facilities.

6. The contaminated soil incineration remediation equipment according to claim 5, characterized in that: Heat-conducting ribs (22) are provided on the outer walls of the upper incineration box (12) and the lower incineration box (8), and the heat-conducting ribs include strip ribs fixed on the outer walls of the incineration boxes and extending in the axial direction, and annular ribs fixed on the outer walls of the incineration boxes and extending in the circumferential direction.

7. The contaminated soil incineration remediation equipment according to claim 6, characterized in that: It also includes a high-level conveyor (17) and a low-level conveyor (10), wherein the end of the high-level conveyor (17) is located above the soil inlet (16), and the head end of the low-level conveyor (10) is located below the soil outlet (9).

8. The contaminated soil incineration remediation equipment according to claim 7, characterized in that: It also includes a support frame (1), an insulation outer box body (13) is fixedly mounted on the top of the support frame (1), and support seats (6) are provided at the bottom front and bottom rear of the lower incineration box (8), the top of the support seat (6) is fixedly connected to the bottom of the lower incineration box (8), the middle part passes through the bottom wall of the insulation outer box body (13), and the bottom is fixedly connected to the support frame (1).

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