Oil-water separation and residue discharge system and method

Abstract

The present application relates to the kitchen waste technical field, specifically to an oil-water separation residue discharging system and method, an oil-water interface instrument is placed in an oil-water separation tank, an oil separation port, a water discharge port and a residue discharge port are respectively arranged at the bottom of the oil-water separation tank, and the present application is respectively arranged on the oil separation port, the water discharge port and the residue discharge port, the pretreater transmits the treated kitchen waste to the oil-water separation tank, the oil-water interface instrument measures the oil-water in the oil-water separation tank, the control box controls the valves of the oil separation port, the water discharge port and the residue discharge port according to the detection structure of the oil-water interface instrument, the oil-water in the oil-water separation tank is completely separated, and the solid residues deposited in the oil-water separation tank are effectively discharged.

Description

TECHNICAL FIELD

[0001] The present application relates to the kitchen waste technical field, specifically to an oil-water separation and residue discharge system and method. BACKGROUND

[0002] Kitchen waste refers to the garbage generated in daily life, food processing, catering services, and unit meal activities, including discarded vegetable leaves, leftovers, fruit peels, eggshells, tea dregs, and bones, etc. Its main sources are household kitchens, restaurants, hotels, canteens, markets, and other food processing-related industries. Kitchen waste contains a high amount of water and organic matter, which can easily rot and produce foul odor. After proper treatment and processing, it can be converted into new resources. The high organic matter content allows it to be used as fertilizer and feed after strict treatment, and it can also produce biogas for fuel or power generation. The oil part can be used to produce biofuels. However, in the existing technology, the water separated from the oil in the kitchen waste treatment process contains residues and has a high oil content, making it difficult to meet the discharge standards. Meanwhile, the automation level of oil-water separation of kitchen waste needs to be improved. SUMMARY

[0003] In order to overcome the defects of the prior art, the purpose of the present application is to provide an oil-water separation and residue discharge system and method to solve the technical problems of incomplete separation of oil and water in kitchen waste and the presence of residues after separation in the prior art.

[0004] The present application is achieved by the following technical solutions:

[0005] An oil-water separation and residue discharge system, comprising a pretreater, an oil-water interface instrument, an oil-water separation tank, and a control box. The top of the oil-water separation tank is provided with a second feed inlet, and the output end of the pretreater is provided with a discharge outlet. The discharge outlet of the pretreater is connected to the second feed inlet. The oil-water interface instrument is vertically placed in the oil-water separation tank, and the detection signal end of the oil-water interface instrument is connected to the control box. One side of the bottom of the oil-water separation tank is provided with a oil outlet, and the oil outlet is provided with a fourth valve. The other side is provided with a water outlet, and the water outlet is provided with a fifth valve. The bottom end of the oil-water separation tank is provided with a residue discharge port, and the residue discharge port is provided with a sixth valve. The signal connection ends of the fourth valve, the fifth valve, and the sixth valve are connected to the control box.

[0006] Preferably, the heights of the oil outlet and the water outlet at the two sides of the bottom of the oil-water separation tank are equal.

[0007] Preferably, filter screens are arranged in the oil outlet and the water outlet.

[0008] Preferably, the output end of the oil outlet is connected to an oil tank.

[0009] Preferably, the output end of the water outlet is connected to a water tank.

[0010] Preferably, the residue outlet end is connected to a residue storage tank.

[0011] Preferably, a conveying pump is arranged between the pretreater and the oil-water separation tank, a second valve is arranged between the conveying pump and the discharge port of the pretreater, and a third valve is arranged between the conveying pump and the second feeding port of the oil-water separation tank.

[0012] Preferably, the top of the pretreater is provided with a first feeding port, and the first feeding port is provided with a first valve.

[0013] Preferably, the control box 9 is provided with a controller, the input end of the controller is connected to a signal receiving module, the output end of the controller is connected to a signal output module, the output end of the signal receiving module is connected to an oil-water interface instrument, the signal output module is connected to the input end of a driving module, and the output end of the driving module is respectively connected to the signal connection end of the fourth valve, the fifth valve and the sixth valve.

[0014] An oil-water separation residue discharging method based on the oil-water separation residue discharging system according to any one of claims 1-9, comprising the following steps:

[0015] Step 1: screening, crushing, slurry preparation, preheating or hydrothermal liquefaction of the kitchen waste in the pretreater; and feeding the pretreated kitchen waste into the oil-water separation tank through the conveying pump;

[0016] Step 2: after the kitchen waste enters the oil-water separation tank, the oil-water interface instrument measures the liquid level height of the oil-water interface and transmits the signal to the control box; when the liquid level height of the oil-water interface is higher than the position height of the oil separation port and the drain port on both sides of the bottom of the oil-water separation tank, the control box controls the fifth valve to open for water drainage until the liquid level height of the oil-water interface is the same as the position height of the oil separation port and the drain port on both sides of the bottom of the oil-water separation tank, and then the control box controls the fifth valve to close;

[0017] Step 3: when the liquid level height of the oil-water interface is the same as the position height of the oil separation port and the drain port on both sides of the bottom of the oil-water separation tank, the control box controls the fourth valve to open for oil separation; when the oil layer of the oil-water interface is discharged through the oil separation port, the control box controls the fourth valve to close;

[0018] Step 4: repeating steps 1-3, when solid residues and residual liquid are deposited at the bottom of the oil-water separation tank, the control box controls the sixth valve to open, and the solid residues and the residual liquid are discharged from the residue outlet of the oil-water separation tank.

[0019] Compared with the prior art, the oil-water separation residue discharging system has the following beneficial technical effects:

[0020] The application provides an oil-water separation residue discharging system, an oil-water interface instrument is placed in an oil-water separation tank, a separated oil outlet, a water outlet and a residue outlet are arranged at the bottom of the oil-water separation tank, and the application is arranged on the separated oil outlet, the water outlet and the residue outlet, the pretreater transmits the treated kitchen waste to the oil-water separation tank, the oil-water interface instrument measures the oil-water in the oil-water separation tank, the control box controls the valves of the separated oil outlet, the water outlet and the residue outlet according to the detection structure of the oil-water interface instrument, the oil-water in the oil-water separation tank is completely separated, and the solid residues deposited in the oil-water separation tank are effectively discharged.

[0021] Further, the positions of the separated oil outlet and the water outlet at the bottom of the oil-water separation tank are at the same height, the reference contrast of the oil-water interface instrument is reduced, the position height of the separated oil outlet and the water outlet at the bottom of the oil-water separation tank can be compared with the oil-water interface measured by the oil-water interface instrument, and the detection efficiency is improved.

[0022] Further, the separated oil outlet and the water outlet are both provided with filter screens, the residues on the separated oil outlet and the water outlet are effectively filtered, and the residues flow to the bottom of the oil-water separation tank.

[0023] Further, the output end of the separated oil outlet is connected with an oil pipe, the output end of the water outlet is connected with a water tank, and the output end of the residue outlet is connected with a residue storage tank, so that the oil liquid of the separated oil outlet, the liquid of the water outlet and the residues of the residue outlet are effectively recycled.

[0024] Further, a conveying pump is arranged between the pretreater and the oil-water separation tank, a second valve is arranged between the conveying pump and the discharge port of the pretreater, and a third valve is arranged between the conveying pump and the second feeding port of the oil-water separation tank, so that the kitchen waste treated by the pretreater is effectively conveyed into the oil-water separation tank.

[0025] Further, a first feeding port is arranged at the top of the pretreater, and a first valve is arranged on the first feeding port, so that the kitchen waste is conveniently conveyed into the pretreater for pretreatment.

[0026] Further, the control box collects information of the whole system and controls driving, and the intelligence of the system is improved.

[0027] The application also provides an oil-water separation residue discharging method, the oil-water interface instrument, the control box and the valves at the separated oil outlet and the water outlet are connected, the oil-water interface instrument and the control box control the opening sequence of the separated oil outlet and the water outlet, the automatic oil-water separation of the kitchen waste can be realized, the recycling of the oil phase in the kitchen waste is promoted, and the further treatment of the kitchen waste is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic view of the oil-water separation residue discharging in the application.

[0029] Figure 2 Figure 1 is a schematic diagram of the principle structure of the control box in the present application.

[0030] In the figure: 1 - pretreater; 2 - delivery pump; 3 - oil-water interface instrument; 4 - oil-water separation tank; 5 - oil tank; 6 - water tank; 7 - residue storage tank; 8 - filter screen; 9 - control box; 10 - first feeding port; 11 - discharging port; 13 - second feeding port; 14 - oil separation port; 15 - water discharging port; 16 - residue discharging port; 17 - first valve; 18 - second valve; 19 - third valve; 20 - fourth valve; 21 - fifth valve; 22 - sixth valve. DETAILED DESCRIPTION

[0031] In order to make the personnel in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] The present application will be described in further detail below in combination with the drawings:

[0034] The present application aims to provide an oil-water separation residue discharging system and method to solve the technical problems that the oil and water in kitchen waste cannot be completely separated and there is residue after separation in the prior art.

[0035] Specifically, as Figure 1As shown, the oil-water separation residue discharging system comprises a pretreater 1, an oil-water interface instrument 3, an oil-water separation tank 4 and a control box 9; the top of the oil-water separation tank 4 is provided with a second feeding port 13, the output end of the pretreater 1 is provided with a discharging port 11, the discharging port 11 of the pretreater 1 is communicated with the second feeding port 13, the oil-water interface instrument 3 is vertically placed in the oil-water separation tank 4, and the detection signal end of the oil-water interface instrument 3 is connected with the control box 9; one side of the bottom of the oil-water separation tank 4 is provided with an oil separation port 14, the oil separation port 14 is provided with a fourth valve 20, the other side is provided with a water discharge port 15, the water discharge port 15 is provided with a fifth valve 21, the bottom end of the oil-water separation tank 4 is provided with a residue discharging port 16, the residue discharging port 16 is provided with a sixth valve 22, and the signal connection ends of the fourth valve 20, the fifth valve 21 and the sixth valve 22 are connected with the control box 9.

[0036] Specifically, the positions of the oil separation port 14 and the water discharge port 15 at the two sides of the bottom of the oil-water separation tank 4 are equal in height, and the height is determined according to the solid content of the kitchen waste.

[0037] Specifically, the oil separation port 14 and the water discharge port 15 are each provided with a filter screen 8.

[0038] Specifically, the output end of the oil separation port 14 is connected with an oil tank 5, the output end of the water discharge port 15 is connected with a water tank 6, and the output end of the residue discharging port 16 is connected with a residue storage tank 7.

[0039] Specifically, a conveying pump 2 is arranged between the pretreater 1 and the oil-water separation tank 4, a second valve 18 is arranged between the conveying pump 2 and the discharging port 11 of the pretreater 1, and a third valve 19 is arranged between the conveying pump 2 and the second feeding port 13 of the oil-water separation tank 4.

[0040] Specifically, the top of the pretreater 1 is provided with a first feeding port 10, and the first feeding port 10 is provided with a first valve 17.

[0041] Specifically, the control box 9 is provided with a controller, and the controller is connected with the signal receiving module and the signal output module. Figure 2 As shown, the input end of the controller is connected with the signal receiving module, the output end of the controller is connected with the signal output module, the output end of the signal receiving module is connected with the oil-water interface instrument 3, the signal output module is connected with the input end of the driving module, and the output end of the driving module is respectively connected with the signal connection ends of the fourth valve 20, the fifth valve 21 and the sixth valve 22.

[0042] The application also provides an oil-water separation residue discharging method based on the oil-water separation residue discharging system.

[0043] Step 1, the kitchen waste is screened, crushed, pulped, preheated or hydrothermally liquefied in the pretreater 1, and the pretreated kitchen waste enters the oil-water separation tank 4 through the conveying pump 2;

[0044] Step 2, after the kitchen waste enters the oil-water separation tank 4, the oil-water interface instrument 3 measures the liquid level height of the oil-water interface, and transmits the signal to the control box 9, when the liquid level height of the oil-water interface is higher than the position height of the oil outlet 14 and the drain outlet 15 on both sides of the bottom of the oil-water separation tank 4, the control box 9 controls the fifth valve 21 to open for drainage until the liquid level height of the oil-water interface is the same as the position height of the oil outlet 14 and the drain outlet 15 on both sides of the bottom of the oil-water separation tank 4, and the control box 9 controls the fifth valve 21 to close;

[0045] Step 3, when the liquid level height of the oil-water interface is the same as the position height of the oil outlet 14 and the drain outlet 15 on both sides of the bottom of the oil-water separation tank 4, the control box 9 controls the fourth valve 20 to open, and the oil separation process is carried out, when the oil layer of the oil-water interface is drained through the oil outlet 14, the control box 9 controls the fourth valve 20 to close;

[0046] Step 4, repeat steps 1-3, when the solid residues and residual liquid are deposited in the bottom of the oil-water separation tank 4, the control box 9 controls the sixth valve 22 to open, and the solid residues and residual liquid are discharged through the residue outlet 16.

[0047] The oil-water interface instrument 3 can measure the oil-water interface liquid level in the range of the height of the oil outlet 14 and the drain outlet 15

[0048] The oil-water interface instrument 3 includes but is not limited to a floating ball type oil-water interface liquid level meter, a capacitive type oil-water interface liquid level meter, a photoelectric type oil-water interface sensor and the like

[0049] The preprocessor 1 includes but is not limited to a metal-plastic screening device, a crushing pulper, a preheater, a hydrothermal liquefaction reactor and the like or a combination of these devices.

[0050] In summary, the oil-water separation and residue discharge system and method provided by the application places an oil-water interface instrument in an oil-water separation tank, sets an oil outlet, a drain outlet and a residue outlet on the bottom of the oil-water separation tank, and sets the application on the oil outlet, the drain outlet and the residue outlet, the preprocessor transmits the processed kitchen waste to the oil-water separation tank, the oil-water interface instrument measures the oil-water in the oil-water separation tank, and the control box controls the valves of the oil outlet, the drain outlet and the residue outlet according to the detection structure of the oil-water interface instrument, so that the oil-water in the oil-water separation tank is completely separated, and the solid residues deposited in the oil-water separation tank are effectively discharged.

[0051] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit it. Although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. An oil-water separation and residue discharge method, which is realized by an oil-water separation and residue discharge system, the oil-water separation and residue discharge system comprising a pretreater (1), an oil-water interface instrument (3), an oil-water separation tank (4) and a control box (9); the top of the oil-water separation tank (4) is provided with a second feeding port (13), the output end of the pretreater (1) is provided with a discharging port (11), the discharging port (11) of the pretreater (1) is communicated with the second feeding port (13), the oil-water interface instrument (3) is vertically placed in the oil-water separation tank (4), and the oil-water interface instrument (3) is connected with the control box (9) in a detection signal end mode; one side of the bottom of the oil-water separation tank (4) is provided with a separated oil port (14), the separated oil port (14) is provided with a fourth valve (20); the other side is provided with a drainage port (15), the drainage port (15) is provided with a fifth valve (21), the bottom end of the oil-water separation tank (4) is provided with a residue discharge port (16), the residue discharge port (16) is provided with a sixth valve (22), and the signal connection ends of the fourth valve (20), the fifth valve (21) and the sixth valve (22) are connected with the control box (9); The oil drain port (14) and the water drain port (15) are at the same height on both sides of the bottom of the oil-water separation tank (4), characterized in that, The method comprises the following steps: Step 1, the kitchen waste is screened, crushed, pulped, preheated or hydrolyzed in the pretreater (1); the pretreated kitchen waste is fed into the oil-water separation tank (4) through a conveying pump (2); Step 2, after the kitchen waste enters the oil-water separation tank (4), the oil-water interface instrument (3) measures the liquid level height of the oil-water interface and transmits the signal to the control box (9); when the liquid level height of the oil-water interface is higher than the position height of the separated oil port (14) and the drainage port (15) on the two sides of the bottom of the oil-water separation tank (4), the control box (9) controls the fifth valve (21) to be opened to discharge water until the liquid level height of the oil-water interface is the same as the position height of the separated oil port (14) and the drainage port (15) on the two sides of the bottom of the oil-water separation tank (4), and then the control box (9) controls the fifth valve (21) to be closed; Step 3, when the liquid level height of the oil-water interface is the same as the position height of the separated oil port (14) and the drainage port (15) on the two sides of the bottom of the oil-water separation tank (4), the control box (9) controls the fourth valve (20) to be opened to carry out the oil separation process; when the oil layer of the oil-water interface is discharged through the separated oil port (14), the control box (9) controls the fourth valve (20) to be closed; Step 4, steps 1-3 are repeated; when the solid residues and residual liquid are deposited at the bottom of the oil-water separation tank (4), the control box (9) controls the sixth valve (22) to be opened to discharge the solid residues and the residual liquid through the residue discharge port (16).

2. The oil-water separation and residue discharge method according to claim 1, characterized in that, The separated oil port (14) and the drainage port (15) are both provided with a filter screen (8).

3. The oil-water separation and residue discharge method according to claim 1, characterized in that, The output end of the separated oil port (14) is connected with an oil tank (5).

4. The oil-water separation and residue discharge method according to claim 1, characterized in that, The output end of the drainage port (15) is connected with a water tank (6).

5. The oil-water separation and residue discharge method according to claim 1, characterized in that, The output end of the residue discharge port (16) is connected with a residue storage tank (7).

6. The oil-water separation and residue discharge method according to claim 1, characterized in that, The preprocessor (1) is provided with a delivery pump (2) between the oil-water separation tank (4), the delivery pump (2) is provided with a second valve (18) between the discharge port (11) of the preprocessor (1); the delivery pump (2) is provided with a third valve (19) between the second inlet (13) of the oil-water separation tank (4).

7. The oil-water separation and residue discharge method according to claim 1, characterized in that, The top of the preprocessor (1) is provided with a first inlet (10), and the first inlet (10) is provided with a first valve (17).

8. The oil-water separation and residue discharge method according to claim 1, characterized in that, The control box (9) is provided with a controller, the input end of the controller is connected with a signal receiving module, the output end of the controller is connected with a signal output module, the output end of the signal receiving module is connected with the oil-water interface instrument (3); the signal output module is connected with the input end of a driving module, and the output end of the driving module is respectively connected with the signal connection end of the fourth valve (20), the fifth valve (21) and the sixth valve (22).

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