A remediation system for soil or sludge contaminated with organic matter.

Abstract

This invention relates to the field of soil or sludge remediation technology, and more particularly to a remediation system for soil or sludge contaminated with organic matter. In this system, a helical propulsion device transports first soil or first sludge to be remediated. A molten salt storage tank stores hot molten salt, which exchanges heat with the helical propulsion device to desorb the first soil or first sludge in situ. A first organic matter absorption device absorbs the first organic matter generated by the first soil or first sludge. A water tank exchanges heat with the hot molten salt to generate hot steam, which enters a steam storage tank. The steam storage tank is connected to an injection well in second soil or second sludge to be remediated, providing enhanced heating to the second soil or second sludge. A second organic matter absorption device is connected to an extraction well in the second soil or second sludge, absorbing the second organic matter generated by the second soil or second sludge. This technical solution can improve the remediation efficiency of soil or sludge.

Description

Technical Field

[0001] This invention relates to the field of soil or sludge remediation technology, and more particularly to a remediation system for soil or sludge contaminated with organic matter. Background Technology

[0002] Organic pollution has attracted great attention from national and local governments, and it is imperative to actively carry out remediation work on existing organic polluted soil environments.

[0003] Among related technologies, the main remediation methods for organically contaminated soil or sludge include thermal remediation, chemical oxidation remediation, and bioremediation. However, the remediation efficiency of these methods for soil or sludge is relatively low.

[0004] Therefore, there is an urgent need for a remediation system for soil or sludge contaminated with organic matter to solve the above problems. Summary of the Invention

[0005] This invention describes a remediation system for soil or sludge contaminated with organic matter, which can improve the remediation efficiency of soil or sludge.

[0006] One embodiment of the present invention provides a remediation system for organically contaminated soil or sludge, comprising:

[0007] The first remediation unit includes a spiral propulsion device, a first organic matter absorption device, and a molten salt storage tank. The spiral propulsion device is connected to the first organic matter absorption device and the molten salt storage tank. The spiral propulsion device is used to transport the first soil or first sludge to be remediated. The molten salt storage tank stores hot molten salt, which is used to exchange heat with the spiral propulsion device to perform in-situ desorption of the first soil or first sludge. The first organic matter absorption device is used to absorb the first organic matter generated by the in-situ desorption of the first soil or first sludge.

[0008] The second remediation unit includes a water tank, a steam storage tank, and a second organic matter absorption device. The water tank is connected to both the molten salt storage tank and the steam storage tank. After exchanging heat with the hot molten salt, the water tank generates hot steam, which enters the steam storage tank. The output end of the steam storage tank is connected to an injection well located in the second soil or second sludge to be remediated, so as to enhance the heating of the second soil or second sludge. The second organic matter absorption device is connected to an extraction well located in the second soil or second sludge to be remediated, and is used to absorb the second organic matter generated by the enhanced heating of the second soil or second sludge.

[0009] The remediation system for soil or sludge contaminated with organic matter provided in the embodiments of the present invention, by setting up a first remediation unit and a second remediation unit, forms a tiered remediation of soil or sludge contaminated with organic matter. In one system, in-situ desorption and enhanced heating remediation of soil or sludge can be completed simultaneously. Therefore, the above technical solution can improve the remediation efficiency of soil or sludge. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A schematic diagram of a remediation system for organically contaminated soil or sludge is shown according to one embodiment.

[0012] Figure label:

[0013] 1-First repair unit;

[0014] 11-Screw propulsion device;

[0015] 111 - Temperature sensor;

[0016] 12-First organic matter absorption device;

[0017] 121-Power Pump;

[0018] 122-Absorption bottle;

[0019] 123-PDMS membrane;

[0020] 124 - Pressure valve;

[0021] 13 - Molten salt storage tank;

[0022] 131 - Coil;

[0023] 132 - Electric heating rod;

[0024] 133 - Insulation layer;

[0025] 14-Oxidizing agent spraying device;

[0026] 141 - Oxidizing agent bottle;

[0027] 142 - Spray nozzle;

[0028] 2-Second repair unit;

[0029] 21-Water tank;

[0030] 22-Steam storage tank;

[0031] 23-Second organic matter absorption device;

[0032] 231 - Primary water removal filter;

[0033] 232 - Secondary water removal filter;

[0034] 233 - Sewage collection tank;

[0035] 24-Injection well;

[0036] 25 - Extraction well. Detailed Implementation

[0037] The solution provided by the present invention will now be described with reference to the accompanying drawings.

[0038] like Figure 1 As shown, this embodiment of the invention provides a remediation system for soil or sludge contaminated with organic matter. The system includes a first remediation unit 1 and a second remediation unit 2, wherein:

[0039] The first remediation unit 1 includes a spiral propulsion device 11, a first organic matter absorption device 12, and a molten salt storage tank 13. The spiral propulsion device 11 is connected to the first organic matter absorption device 12 and the molten salt storage tank 13 respectively. The spiral propulsion device 11 is used to transport the first soil or first sludge to be remediated. The molten salt storage tank 13 stores hot molten salt, which is used to exchange heat with the spiral propulsion device 11 to perform in-situ desorption of the first soil or first sludge. The first organic matter absorption device 12 is used to absorb the first organic matter generated by the in-situ desorption of the first soil or first sludge.

[0040] The second remediation unit 2 includes a water tank 21, a steam storage tank 22, and a second organic matter absorption device 23. The water tank 21 is connected to the molten salt storage tank 13 and the steam storage tank 22 respectively. After exchanging heat with the hot molten salt, the water tank 21 generates hot steam, which enters the steam storage tank 22. The output end of the steam storage tank 22 is connected to the injection well 24 located in the second soil or second sludge to be remediated, so as to enhance the heating of the second soil or second sludge. The second organic matter absorption device 23 is connected to the extraction well 25 located in the second soil or second sludge to be remediated. The second organic matter absorption device 23 is used to absorb the second organic matter generated by the enhanced heating of the second soil or second sludge.

[0041] In this embodiment, by setting up a first remediation unit 1 and a second remediation unit 2, a tiered remediation of soil or sludge contaminated with organic matter is formed. Soil remediation of soil or sludge by in-situ desorption and enhanced heating can be completed simultaneously in one system. Therefore, the above technical solution can improve the remediation efficiency of soil or sludge.

[0042] In one embodiment of the present invention, the first organic matter absorption device 12 includes a power pump 121 and an absorption bottle 122. The power pump 121 is used to draw the first organic matter into the absorption bottle 122. The absorption bottle 122 is provided with an organic solvent, which is used to absorb the first organic matter.

[0043] In some embodiments, the organic solvent may be any one of DMF, THF, DMSO, CHCl3, dioxane, and 3-pentanone.

[0044] In one embodiment of the present invention, a PDMS membrane 123 that can move up and down is also provided inside the absorption bottle 122. The organic solvent is located below the PDMS membrane 123. A pressure valve 124 is provided at the mouth of the absorption bottle 122. The PDMS membrane 123 is used to allow the first organic matter to pass through but not to allow air to pass through, and moves downward under the pressure of air to promote the absorption of the first organic matter by the organic solvent. The pressure valve 124 opens when a preset pressure is reached to discharge the gas above the PDMS membrane 123.

[0045] It should be noted that the structure that moves up and down can be provided with an inner ring inside the absorption bottle 122, and a PDMS membrane is placed between the inner rings. In this way, when air compresses the PDMS, the inner rings can move up and down relative to the absorption bottle 122.

[0046] In one embodiment of the present invention, the first remediation unit 1 further includes an oxidant spraying device 14, which is used to spray an oxidant onto the surface of the first soil or the first sludge. This configuration can degrade pollutants, reduce heat consumption, and lower treatment costs.

[0047] In some implementations, the oxidant may be persulfate.

[0048] In one embodiment of the present invention, the oxidant spraying device 14 includes an oxidant bottle 141 and a plurality of spray nozzles 142 disposed within the screw propulsion device 11. The oxidant bottle 141 stores oxidant, which is used to spray onto the surface of the first soil or the first sludge through the plurality of spray nozzles 142. This arrangement ensures a uniform spraying effect.

[0049] In one embodiment of the present invention, the second organic matter absorption device 23 includes a primary water removal filter 231, a secondary water removal filter 232, and a wastewater collection tank 233. The input end of the primary water removal filter 231 is connected to the extraction well 25, and the output end is connected to the secondary water removal filter 232 and the wastewater collection tank 233 respectively. The output end of the secondary water removal filter 232 is connected to the wastewater collection tank 233. Both the primary water removal filter 231 and the secondary water removal filter 232 are used to remove moisture and second organic matter carried by the gas in the extraction well 25. The wastewater collection tank 233 is used to collect the water and second organic matter discharged by the primary water removal filter 231 and the secondary water removal filter 232.

[0050] In this embodiment, by setting up a two-stage filtration scheme, the absorption effect of the second organic matter can be better ensured.

[0051] In one embodiment of the present invention, a water tank 21 is connected to a spiral propulsion device 11. A temperature sensor 111 is installed inside the spiral propulsion device 11. The water tank 21 supplies water to the outer surface cavity of the spiral propulsion device 11 when the temperature detected by the temperature sensor 111 exceeds a preset temperature, thereby maintaining the temperature detected by the temperature sensor 111 at the preset temperature. The water, after heat exchange in the spiral propulsion device 11, circulates back to the water tank 21 to increase the water temperature in the water tank 21. This configuration allows for both cooling of the spiral propulsion device 11 using water and increased thermal energy storage in the water tank 21, thereby further reducing energy waste and repair costs.

[0052] In one embodiment of the present invention, a coil 131 is provided inside the molten salt storage tank 13. The input end of the coil 131 is connected to the water tank 21, and the output end is connected to the steam storage tank 22. This arrangement can ensure the heat exchange effect of the water to quickly generate hot steam.

[0053] In one embodiment of the present invention, an electric heating rod 132 is inserted into the molten salt storage tank 13. The electric heating rod 132 is used to connect to off-peak electricity or renewable energy. This arrangement can make full use of electricity with low prices or difficulty in connecting to the grid, thereby reducing the cost of soil remediation.

[0054] In one embodiment of the present invention, an insulation layer 133 is provided on the outer surface of the molten salt storage tank 13. This arrangement can prevent heat loss.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remediation system for soil or sludge contaminated with organic matter, characterized in that, include: The first remediation unit (1) includes a spiral propulsion device (11), a first organic matter absorption device (12), and a molten salt storage tank (13). The spiral propulsion device (11) is connected to the first organic matter absorption device (12) and the molten salt storage tank (13) respectively. The spiral propulsion device (11) is used to transport the first soil or the first sludge to be remediated. The molten salt storage tank (13) stores hot molten salt. The hot molten salt is used to exchange heat with the spiral propulsion device (11) to desorb the first soil or the first sludge in situ. The first organic matter absorption device (12) is used to absorb the first organic matter generated by the in situ desorption of the first soil or the first sludge. The second remediation unit (2) includes a water tank (21), a steam storage tank (22), and a second organic matter absorption device (23). The water tank (21) is connected to the molten salt storage tank (13) and the steam storage tank (22) respectively. The water tank (21) generates hot steam after exchanging heat with the hot molten salt and enters the steam storage tank (22). The output end of the steam storage tank (22) is connected to an injection well (24) located in the second soil or second sludge to be remediated, so as to enhance the heating of the second soil or second sludge. The second organic matter absorption device (23) is connected to an extraction well (25) located in the second soil or second sludge to be remediated. The second organic matter absorption device (23) is used to absorb the second organic matter generated by the enhanced heating of the second soil or second sludge. The first organic matter absorption device (12) includes a power pump (121) and an absorption bottle (122). The power pump (121) is used to draw the first organic matter into the absorption bottle (122). The absorption bottle (122) is provided with an organic solvent, which is used to absorb the first organic matter. The absorption bottle (122) is also provided with a PDMS membrane (123) that can move up and down. The organic solvent is located below the PDMS membrane (123). The mouth of the absorption bottle (122) is provided with a pressure valve (124). The PDMS membrane (123) is used to allow the first organic matter to pass through and move downward under the pressure of air to promote the absorption of the first organic matter by the organic solvent. The pressure valve (124) opens when the preset pressure is reached to discharge the gas above the PDMS membrane (123). The water tank (21) is connected to the spiral propulsion device (11). A temperature sensor (111) is installed inside the spiral propulsion device (11). The water tank (21) is used to supply water to the outer surface cavity of the spiral propulsion device (11) when the temperature detected by the temperature sensor (111) exceeds the preset temperature, so that the temperature detected by the temperature sensor (111) is maintained at the preset temperature. The water after heat exchange by the spiral propulsion device (11) is circulated to the water tank (21) to increase the water temperature in the water tank (21).

2. The system according to claim 1, characterized in that, The first remediation unit (1) further includes an oxidant spraying device (14) for spraying an oxidant onto the surface of the first soil or the first sludge.

3. The system according to claim 2, characterized in that, The oxidant spraying device (14) includes an oxidant bottle (141) and a plurality of spray nozzles (142) disposed in the spiral propulsion device (11). The oxidant bottle (141) stores oxidant, which is used to spray onto the surface of the first soil or the first sludge through the plurality of spray nozzles (142).

4. The system according to claim 1, characterized in that, The second organic matter absorption device (23) includes a primary water removal filter (231), a secondary water removal filter (232), and a wastewater collection tank (233). The input end of the primary water removal filter (231) is connected to the extraction well (25), and the output end is connected to the secondary water removal filter (232) and the wastewater collection tank (233) respectively. The output end of the secondary water removal filter (232) is connected to the wastewater collection tank (233). The primary water removal filter (231) and the secondary water removal filter (232) are both used to remove the moisture and the second organic matter carried by the gas in the extraction well (25). The wastewater collection tank (233) is used to collect the water and the second organic matter discharged by the primary water removal filter (231) and the secondary water removal filter (232).

5. The system according to any one of claims 1-4, characterized in that, The molten salt storage tank (13) is equipped with a coil (131), the input end of which is connected to the water tank (21), and the output end is connected to the steam storage tank (22).

6. The system according to any one of claims 1-4, characterized in that, An electric heating rod (132) is inserted into the molten salt storage tank (13), and the electric heating rod (132) is used to connect to off-peak electricity or new energy power.

7. The system according to any one of claims 1-4, characterized in that, The outer surface of the molten salt storage tank (13) is provided with a heat insulation layer (133).

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