A cleaning system and method for hazardous waste container

Abstract

The present invention discloses a cleaning system for hazardous waste containers, wherein a water injection module is used to mix and stir clean water and cleaning agents; a cleaning module is used to rinse the hazardous waste container with cleaning water; a liquid collecting tank is arranged at the bottom of the cleaning module, and a partition is arranged between the isolation chamber for large hazardous wastes and the connecting chamber; the isolation chamber for large hazardous wastes is connected to the cleaning module, and the connecting chamber is connected to a suspended matter separation device; the suspended matter separation device is used to remove suspended matter in the cleaning water; an oil-water separation device is used to remove oil in the cleaning water; an oxidation module is used to oxidize and filter the cleaning water; and a clean water recovery module is used to send the filtered clean water to the water injection module and / or the isolation chamber for large hazardous wastes. A cleaning method for hazardous waste containers is also disclosed, comprising a water injection step, a cleaning step, a separation step, an oxidation step, and a clean water recovery step. The cleaning system for hazardous waste containers and the cleaning method thereof can fully treat the wastewater after cleaning the hazardous waste containers, avoid environmental pollution, and save water resources.

Description

Technical Field

[0001] The invention relates to the technical field of hazardous waste water treatment, in particular to a cleaning system and a cleaning method for a hazardous waste container. Background Art

[0002] In the hazardous waste industry, there are many containers that have contained hazardous waste. If they are thrown away directly, it will not only waste resources, but also pollute the environment with hazardous waste on the containers. At present, there are equipment on the market for cleaning containers contaminated with hazardous waste materials, but these cleaning systems only consider the cleaning of containers, and lack a system for treating the washing water after cleaning, resulting in insufficient treatment of the washing water contaminated with hazardous waste materials after cleaning. Improper disposal of large pieces of hazardous waste, suspended matter, oil and other impurities in the water will pollute the environment again. In addition, directly discharging the washing water after cleaning will also waste a lot of water resources. Summary of the invention

[0003] In view of the above-mentioned defects, the purpose of the present invention is to provide a hazardous waste container cleaning system and a cleaning method thereof, which can fully treat the wastewater after cleaning the hazardous waste container, avoid polluting the environment and save water resources.

[0004] To achieve this purpose, the present invention adopts the following technical solutions: a cleaning system for a hazardous waste container, which includes, from upstream to downstream, a water injection module, a cleaning module, a separation module, an oxidation module and a clean water recovery module;

[0005] The water injection module is used to mix and stir clean water and cleaning agent to form cleaning water;

[0006] The cleaning module is used to place the hazardous waste container and use the cleaning water to rinse the hazardous waste container;

[0007] The separation module comprises a liquid collection tank, a suspended matter separation device and an oil-water separation device which are connected in sequence;

[0008] The liquid collecting tank is arranged at the bottom of the cleaning module, and the liquid collecting tank comprises a large hazardous waste isolation chamber and a connecting chamber which are interconnected, a partition is arranged between the large hazardous waste isolation chamber and the connecting chamber, and the partition is vertically connected to the bottom plate of the liquid collecting tank;

[0009] The bulk hazardous waste isolation chamber is in communication with the cleaning module, and the connecting chamber is in communication with the suspended matter separation device;

[0010] The suspended matter separation device is used to remove suspended matter in the cleaning water;

[0011] The oil-water separation device is used to remove oil from the cleaning water;

[0012] The oxidation module is in communication with the oil-water separation device, and the oxidation module is used to oxidize and filter the cleaning water to form filtered clean water;

[0013] The clean water recovery module is in communication with the water injection module and / or the bulk hazardous waste isolation chamber, and is used to send the filtered clean water to the water injection module and / or the bulk hazardous waste isolation chamber.

[0014] For example, the water injection module includes a cleaning liquid tank and an agitator, the cleaning liquid tank is provided with a clean water inlet and a dosing port, and the clean water recovery module is connected to the clean water inlet;

[0015] The stirrer is used for stirring the clean water and the cleaning agent.

[0016] It is worth noting that the stirrer includes a telescopic support column and a stirring blade, and the stirring blade is fixed to the top of the cleaning liquid tank through the telescopic support column, and the telescopic support column drives the stirring blade to perform up and down reciprocating motion.

[0017] Optionally, a liquid level gauge is provided on the inner wall of the cleaning liquid tank.

[0018] Specifically, a high-pressure water pump is provided between the cleaning module and the water injection module, a washer is provided in the cleaning module, the washer comprises a cleaning rod and a cleaning head, and the cleaning head is connected to the high-pressure water pump through the cleaning rod.

[0019] Preferably, the cleaning head is rotatably connected to the cleaning rod.

[0020] For example, the bottom plate of the liquid collecting tank is inclined downward from the large hazardous waste isolation chamber toward the connecting chamber.

[0021] It is worth noting that the suspended matter separation device comprises a centrifugal pump and a filter which are connected in sequence, the centrifugal pump is connected to the connecting cavity of the liquid collecting tank, and the filter is connected to the oil-water separation device.

[0022] Optionally, the oxidation module is provided with ozone and activated carbon.

[0023] A method for cleaning a hazardous waste container, comprising a water injection step, a cleaning step, a separation step, an oxidation step and a clean water recovery step;

[0024] The water injection step comprises: injecting clean water into the cleaning liquid through the clean water inlet, and when the clean water submerges the liquid level meter, controlling the clean water inlet to close;

[0025] Driving the stirring blades of the stirrer to stir the clean water and the cleaning agent to form cleaning water;

[0026] The cleaning step is: the cleaning head sprays the cleaning water onto the hazardous waste container;

[0027] The separation step is as follows: the cleaning water used to clean the hazardous waste container flows into the bulk hazardous waste isolation chamber of the liquid collecting tank at the bottom of the cleaning module, and then the bulk hazardous waste is isolated by the partition to form the first cleaning water, and the first cleaning water flows into the connecting chamber;

[0028] The first washing water sequentially flows into the centrifugal pump for centrifugal treatment, and then flows into the filter for filtration to remove suspended matter, thereby forming the second washing water;

[0029] The second washing water is deoiled by the oil-water separation device;

[0030] The oxidation step comprises: oxidizing the second washing water by ozone, and filtering the second washing water by activated carbon to form filtered clean water;

[0031] The clean water recovery step is as follows: the filtered clean water flows into the cleaning liquid tank and / or the bulk hazardous waste isolation chamber.

[0032] The beneficial effects of the present invention are as follows: the cleaning system of the hazardous waste container removes and isolates large pieces of hazardous waste, suspended matter and oil in the cleaning water after cleaning through the liquid collecting tank, suspended matter separation device and oil-water separation device of the separation module, and then the filtered clean water formed after oxidation, disinfection and filtration by the oxidation module is directly recycled through the clean water recovery module, thereby avoiding environmental pollution caused by directly discharging the cleaning water after cleaning, and can also reuse the treated clean water, saving water resources.

[0033] During use, the washing water used to rinse the hazardous waste container flows into the bulk hazardous waste isolation chamber of the liquid collection tank due to gravity. As the rinsing continues, the water level of the washing water in the bulk hazardous waste isolation chamber continues to rise. When the water level is higher than the height of the partition, the washing water overflows into the connecting chamber. Since the density of bulk hazardous waste is greater than that of water, the bulk hazardous waste will settle in the bulk hazardous waste isolation chamber, and will not flow into the connecting chamber as the water overflows, thereby achieving separation of bulk hazardous waste from water.

[0034] The filtered clean water passes through the clean water recovery module and is discharged to the water injection module, where it is remixed with the cleaning agent and stirred to form cleaning water for the next round of cleaning; the filtered clean water passes through the clean water recovery module and is discharged into the large hazardous waste isolation chamber, which can speed up the filtering efficiency of large hazardous waste and allow the cleaning water to flow to the connecting chamber faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0036] Among them: 1 water injection module; 11 cleaning liquid tank; 12 agitator; 121 telescopic support column; 122 stirring blade; 13 clean water inlet; 14 dosing port; 2 cleaning module; 21 cleaning device; 211 cleaning rod; 212 cleaning head; 3 separation module; 31 liquid collection tank; 311 large hazardous waste isolation chamber; 312 connecting chamber; 313 partition; 32 suspended matter separation device; 321 centrifugal pump; 322 filter; 33 oil-water separation device; 4 oxidation module; 5 clean water recovery module; 6 high-pressure water pump. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Combine the following Figure 1 , describing a hazardous waste container cleaning system according to an embodiment of the present invention, which includes, from upstream to downstream, a water injection module 1, a cleaning module 2, a separation module 3, an oxidation module 4 and a clean water recovery module 5;

[0040] The water injection module 1 is used to mix and stir clean water and cleaning agent to form cleaning water;

[0041] The cleaning module 2 is used to place the hazardous waste container and use the cleaning water to rinse the hazardous waste container;

[0042] The separation module 3 includes a liquid collecting tank 31, a suspended matter separation device 32 and an oil-water separation device 33 which are connected in sequence;

[0043] The liquid collecting tank 31 is disposed at the bottom of the cleaning module 2. The liquid collecting tank 31 includes a large hazardous waste isolation chamber 311 and a connecting chamber 312 that are interconnected. A partition plate 313 is disposed between the large hazardous waste isolation chamber 311 and the connecting chamber 312. The partition plate 313 is vertically connected to the bottom plate of the liquid collecting tank 31.

[0044] The bulk hazardous waste isolation chamber 311 is in communication with the cleaning module 2, and the connecting chamber 312 is in communication with the suspended matter separation device 32;

[0045] The suspended matter separation device 32 is used to remove suspended matter in the cleaning water;

[0046] The oil-water separator 33 is used to remove oil from the cleaning water;

[0047] The oxidation module 4 is in communication with the oil-water separation device 33, and the oxidation module 4 is used to oxidize and filter the cleaning water to form filtered clean water;

[0048] The clean water recovery module 5 is connected to the water injection module 1 and / or the large hazardous waste isolation chamber 311 , and the clean water recovery module 5 is used to send the filtered clean water to the water injection module 1 and / or the large hazardous waste isolation chamber 311 .

[0049] The cleaning system of the hazardous waste container removes and isolates large pieces of hazardous waste, suspended matter and oil in the cleaning water after cleaning through the liquid collecting tank 31, the suspended matter separation device 32 and the oil-water separation device 33 of the separation module 3, and then the filtered clean water formed after oxidation, disinfection and filtration by the oxidation module 4 is directly recycled through the clean water recovery module 5, thereby avoiding environmental pollution caused by directly discharging the cleaning water after cleaning, and can also reuse the treated clean water, saving water resources.

[0050] During use, the washing water used to rinse the hazardous waste container flows into the bulk hazardous waste isolation chamber 311 of the liquid collection tank 31 due to gravity. As the rinsing continues, the water level of the washing water in the bulk hazardous waste isolation chamber 311 continues to rise. When the water level is higher than the height of the partition 313, the washing water overflows into the connecting chamber 312. Since the density of bulk hazardous waste is greater than that of water, the bulk hazardous waste will settle in the bulk hazardous waste isolation chamber 311, and will not flow into the connecting chamber 312 as the water overflows, thereby achieving separation of bulk hazardous waste from water.

[0051] The filtered clean water passes through the clean water recovery module 5 and is discharged into the water injection module 1, where it is mixed with the cleaning agent and stirred again to form cleaning water for the next round of cleaning; the filtered clean water passes through the clean water recovery module 5 and is discharged into the large hazardous waste isolation chamber 311, which can speed up the filtering efficiency of large hazardous waste and enable the cleaning water to flow to the connecting chamber 312 faster.

[0052] For example, the water injection module 1 includes a cleaning liquid tank 11 and a stirrer 12, the cleaning liquid tank 11 is provided with a clean water inlet 13 and a dosing port 14, and the clean water recovery module 5 is connected to the clean water inlet 13;

[0053] The stirrer 12 is used to stir the clean water and the cleaning agent.

[0054] When in use, clean water is injected into the cleaning liquid tank 11 from the clean water inlet 13, and then a cleaning agent is injected into the cleaning liquid tank 11 from the drug adding port 14, and the stirrer 12 fully stirs and mixes the clean water and the cleaning agent in the cleaning liquid tank 11. Fully stirring and mixing the clean water and the cleaning agent can improve the ability to clean hazardous waste containers.

[0055] It is worth noting that the stirrer 12 includes a telescopic support column 121 and a stirring blade 122. The stirring blade 122 is fixed to the top of the cleaning liquid tank 11 through the telescopic support column 121, and the telescopic support column 121 drives the stirring blade 122 to reciprocate up and down.

[0056] During stirring, the stirring blade 122 rotates in the cleaning liquid tank 11, thereby achieving the effect of stirring the mixture of clean water and cleaning agent. In addition, the telescopic support column 121 drives the stirring blade 122 to reciprocate up and down, so that the stirring blade 122 can fully stir all the clean water and cleaning agent in the cleaning liquid tank 11, so that the mixture is more fully mixed.

[0057] Optionally, a liquid level gauge is provided on the inner wall of the cleaning liquid tank 11 .

[0058] The water inlet 13 is adjusted by the liquid level meter. When the water level of the liquid in the cleaning liquid tank 11 exceeds the liquid level meter, the clean water inlet 13 is closed to avoid overflow of the liquid in the cleaning liquid tank 11 due to excessive water injection.

[0059] Specifically, a high-pressure water pump 6 is provided between the cleaning module 2 and the water injection module 1 , and a washer 21 is provided in the cleaning module 2 . The washer 21 includes a cleaning rod 211 and a cleaning head 212 . The cleaning head 212 is connected to the high-pressure water pump 6 through the cleaning rod 211 .

[0060] When in use, the cleaning water flows from the water injection module 1 to the high-pressure water pump 6 for pressurization, and then is pumped to the cleaning head 212 through the cleaning rod 211. The cleaning head 212 sprays the cleaning water into the hazardous waste container, thereby achieving the purpose of cleaning.

[0061] Preferably, the cleaning head 212 is rotatably connected to the cleaning rod 211 .

[0062] The cleaning head 212 utilizes the reaction force generated by the flow of the cleaning water to rotate itself, thereby achieving 360° cleaning without dead angles.

[0063] In some embodiments, the bottom plate of the liquid collecting tank 31 is inclined downward from the large hazardous waste isolation chamber 311 toward the connecting chamber 312 .

[0064] After the cleaning water used to flush the hazardous waste container flows into the large hazardous waste isolation chamber 311, the above-mentioned inclined structure is used to make the cleaning water flow toward the connecting chamber 312, which is conducive to the cleaning water quickly entering the connecting chamber 312 and being quickly isolated from the large hazardous waste.

[0065] For example, the suspended matter separation device 32 includes a centrifugal pump 321 and a filter 322 which are connected in sequence. The centrifugal pump 321 is connected to the connecting cavity 312 of the liquid collecting tank 31 , and the filter 322 is connected to the oil-water separation device 33 .

[0066] The cleaning water after separating the large pieces of hazardous waste enters the centrifugal pump 321. Due to the centrifugal action of the centrifugal pump 321, the water in the cleaning water is separated from the suspended matter, and then passes through the filtering action of the filter 322. The suspended matter remains in the filter 322, and the remaining cleaning water passes through the filter 322.

[0067] It is worth noting that the oxidation module 4 is provided with ozone and activated carbon.

[0068] Ozone has the effect of oxidation and disinfection, and activated carbon has the effect of adsorption. Through the action of ozone and activated carbon, the chemical oxygen demand in the cleaning water can be removed.

[0069] Specifically, a method for cleaning a hazardous waste container includes a water injection step, a cleaning step, a separation step, an oxidation step, and a clean water recovery step;

[0070] The water injection step comprises: injecting clean water into the cleaning liquid tank 11 through the clean water inlet 13, and when the clean water submerges the liquid level meter, controlling the clean water inlet 13 to be closed;

[0071] The stirring blade 122 of the stirrer 12 is driven to stir the clean water and the cleaning agent to form cleaning water;

[0072] The cleaning step is: the cleaning head 212 sprays the cleaning water onto the hazardous waste container;

[0073] The separation step is as follows: the cleaning water that has cleaned the hazardous waste container flows into the bulk hazardous waste isolation chamber 311 of the liquid collecting tank 31 at the bottom of the cleaning module 2, and then the bulk hazardous waste is isolated by the partition 313 to form the first cleaning water, and the first cleaning water flows into the connecting chamber 312;

[0074] The first washing water sequentially flows into the centrifugal pump 321 for centrifugal treatment, and then flows into the filter 322 for filtration to remove suspended matter, thereby forming the second washing water;

[0075] The second washing water is deoiled by the oil-water separation device 33;

[0076] The oxidation step comprises: oxidizing the second washing water by ozone, and filtering the second washing water by activated carbon to form filtered clean water;

[0077] The clean water recovery step is as follows: the filtered clean water flows into the cleaning liquid tank 11 and / or the bulk hazardous waste isolation chamber 311 .

[0078] The hazardous waste container cleaning method utilizes a water injection step and a cleaning step to fully clean the hazardous waste container, and then utilizes the separation step to remove and isolate large pieces of hazardous waste, suspended matter and oil in the cleaning water after cleaning, and then the filtered clean water formed after oxidation, disinfection and filtration in the oxidation step is directly recycled in the clean water recycling step, thereby avoiding environmental pollution caused by directly discharging the cleaning water after cleaning, and can also reuse the treated clean water, saving water resources.

[0079] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hazardous waste container cleaning system, characterized in that: From upstream to downstream, it includes a water injection module, a cleaning module, a separation module, an oxidation module and a clean water recovery module; The water injection module is used to mix and stir clean water and cleaning agent to form cleaning water; The cleaning module is used to place the hazardous waste container and use the cleaning water to rinse the hazardous waste container; The separation module comprises a liquid collection tank, a suspended matter separation device and an oil-water separation device which are connected in sequence; The liquid collecting tank is arranged at the bottom of the cleaning module, and the liquid collecting tank comprises a large hazardous waste isolation chamber and a connecting chamber which are interconnected, a partition is arranged between the large hazardous waste isolation chamber and the connecting chamber, and the partition is vertically connected to the bottom plate of the liquid collecting tank; The bulk hazardous waste isolation chamber is in communication with the cleaning module, and the connecting chamber is in communication with the suspended matter separation device; The suspended matter separation device is used to remove suspended matter in the cleaning water; The oil-water separation device is used to remove oil from the cleaning water; The oxidation module is in communication with the oil-water separation device, and the oxidation module is used to oxidize and filter the cleaning water to form filtered clean water; The clean water recovery module is in communication with the water injection module and / or the bulk hazardous waste isolation chamber, and is used to send the filtered clean water to the water injection module and / or the bulk hazardous waste isolation chamber.

2. A hazardous waste container cleaning system according to claim 1, characterized in that: The water injection module includes a cleaning liquid tank and an agitator, the cleaning liquid tank is provided with a clean water inlet and a dosing port, and the clean water recovery module is connected to the clean water inlet; The stirrer is used for stirring the clean water and the cleaning agent.

3. A hazardous waste container cleaning system according to claim 2, characterized in that: The stirrer comprises a telescopic support column and a stirring blade, wherein the stirring blade is fixed to the top of the cleaning liquid tank through the telescopic support column, and the telescopic support column drives the stirring blade to perform up and down reciprocating motion.

4. A hazardous waste container cleaning system according to claim 3, characterized in that: The inner wall of the cleaning liquid tank is provided with a liquid level gauge.

5. A hazardous waste container cleaning system according to claim 4, characterized in that: A high-pressure water pump is provided between the cleaning module and the water injection module. A washer is provided in the cleaning module. The washer comprises a cleaning rod and a cleaning head. The cleaning head is connected to the high-pressure water pump through the cleaning rod.

6. A hazardous waste container cleaning system according to claim 5, characterized in that: The cleaning head is rotatably connected to the cleaning rod.

7. A hazardous waste container cleaning system according to claim 6, characterized in that: The bottom plate of the liquid collecting tank is inclined downward from the large hazardous waste isolation chamber toward the connecting chamber.

8. A hazardous waste container cleaning system according to claim 7, characterized in that: The suspended matter separation device comprises a centrifugal pump and a filter which are connected in sequence. The centrifugal pump is connected to the connecting cavity of the liquid collecting tank, and the filter is connected to the oil-water separation device.

9. A hazardous waste container cleaning system according to claim 8, characterized in that: The oxidation module is provided with ozone and activated carbon.

10. A method for cleaning a hazardous waste container, using the hazardous waste container cleaning system according to claim 9, characterized in that: It includes a water injection step, a cleaning step, a separation step, an oxidation step and a clean water recovery step; The water injection step comprises: injecting clean water into the cleaning liquid through the clean water inlet, and when the clean water submerges the liquid level meter, controlling the clean water inlet to close; Driving the stirring blades of the stirrer to stir the clean water and the cleaning agent to form cleaning water; The cleaning step is: the cleaning head sprays the cleaning water onto the hazardous waste container; The separation step is as follows: the cleaning water used to clean the hazardous waste container flows into the bulk hazardous waste isolation chamber of the liquid collecting tank at the bottom of the cleaning module, and then the bulk hazardous waste is isolated by the partition to form the first cleaning water, and the first cleaning water flows into the connecting chamber; The first washing water sequentially flows into the centrifugal pump for centrifugal treatment, and then flows into the filter for filtration to remove suspended matter, thereby forming the second washing water; The second washing water is deoiled by the oil-water separation device; The oxidation step comprises: oxidizing the second washing water by ozone, and filtering the second washing water by activated carbon to form filtered clean water; The clean water recovery step is as follows: the filtered clean water flows into the cleaning liquid tank and / or the bulk hazardous waste isolation chamber.

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