Kitchen waste recycling and processing equipment and method

Abstract

The present invention discloses a kitchen waste recycling and processing device and method, which relates to the technical field of kitchen waste processing. It solves the problem that the kitchen waste processing device in the prior art cannot completely remove the oil and salt in the kitchen waste, and a part of the oil and salt will still remain in the squeezed kitchen waste, resulting in poor kitchen waste processing effect. In view of the problem that some kitchen waste has a poor crushing effect due to a large amount of water, a spiral extrusion mechanism is used to dewater the kitchen waste, and the conveying function of the spiral extrusion mechanism is used to convey the kitchen waste to the front of the crushing mechanism to meet the requirement of continuous operation of the device. The kitchen waste is preliminarily de-oiled and salted by the spiral extrusion mechanism, and after crushing, it is further de-oiled and salted by cold water rinsing. The de-oiling and salting by hot water rinsing greatly reduce the oil and salt content of the kitchen waste, which is beneficial to subsequent processing and prevention of environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen waste treatment, and in particular to a kitchen waste recycling and treatment device and method. Background Art

[0002] Kitchen waste primarily comes from household kitchens, restaurants, canteens, markets, and other food processing-related industries. It contains a high content of organic matter, which, after processing, can be used as fertilizer, feed, or to generate biogas for fuel or power generation. The oil and fat fraction can also be used to produce biofuel. Due to the unique dietary habits of some regions, kitchen waste is high in moisture, oil, and salt. Improper handling can cause significant environmental pollution.

[0003] Existing kitchen waste treatment devices have disadvantages such as single function, low efficiency, and insufficient removal of oil and salt, which to a certain extent limit the application of kitchen waste treatment devices. Chinese patent application CN201710108739.8 discloses a kitchen waste treatment device, whose process flow is spiral extrusion filtration after cutting and crushing by a tool. This device can achieve a certain degree of dehydration and de-oiling of salt, but the kitchen waste has a lot of water and sticks to each other. Direct crushing will make the cutting effect worse. In addition, the oil and salt in the kitchen waste cannot be completely removed by extrusion filtration. Some of the oil and salt will still remain in the squeezed kitchen waste, resulting in poor treatment effect of the kitchen waste, which will greatly affect its quality as waste and feed, and even pollute the environment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a kitchen waste recycling and processing equipment and method, which can realize the preliminary removal of oil and salt from kitchen waste through a spiral extrusion mechanism, and then continue to remove oil and salt by cold water washing and hot water washing after the material is crushed, so as to greatly reduce the oil and salt content of the kitchen waste, which is beneficial to subsequent processing and prevents environmental pollution.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A kitchen waste recycling and processing device includes a hot water system, a cold water system, and a screw extrusion mechanism. The screw extrusion mechanism is connected to a centrifugal dehydration mechanism via a feeding channel. A crushing mechanism is provided in the feeding channel. The centrifugal dehydration mechanism is provided with a discharge port at one end and a water outlet at the other end. The discharge port is connected to a drying mechanism and a flushing tank respectively via a pipeline with a control switch. The water outlet is connected to a liquid recovery device.

[0007] The cold water system is connected to the end of the feeding channel through a cold water pipeline with a cold water pump. The bottom of the flushing tank is connected to the cold water pipeline and is provided with a feed valve. The hot water tank is connected to the flushing tank through a hot water pipeline. A first temperature sensor is provided in the centrifugal dehydration mechanism to identify that the discharge port is connected to the drying mechanism when hot water is used and that the discharge port is connected to the flushing tank when cold water is used.

[0008] A first laser sensor is set below the crushing mechanism in the feeding channel to obtain food waste signals to control the operation of the cold water system, cold water pump and spiral extrusion mechanism; a second laser sensor is set in the flushing box to obtain food waste signals to control the operation of the hot water system, cold water pump and feed valve, so that the material after hot water flushing can re-enter the centrifugal dehydration mechanism.

[0009] As a further implementation method, the spiral extrusion mechanism includes a filter barrel, a filter layer is axially arranged inside the filter barrel, a filtrate box is arranged at the bottom of the filter layer, a feed port is arranged at the filter layer, a spiral cone shaft is arranged inside the filter layer, and a first driving mechanism is arranged at one end of the spiral cone shaft away from the feed channel.

[0010] As a further implementation, the crushing mechanism is provided in the middle section of the feeding channel;

[0011] A fixed tool is fixed on the wall of the feeding channel, a movable tool shaft is provided at the center of the cross section, the movable tool shaft is provided with a movable tool, and the movable tool shaft is connected to the second driving mechanism.

[0012] As a further implementation, the centrifugal dehydration mechanism adopts a horizontal spiral centrifuge, which includes an outer shell, and the discharge port and the water outlet are arranged at both ends of the outer shell.

[0013] As a further implementation, the cold water system includes a cold water tank, the bottom of the cold water tank is connected to a cold water pipeline, a cold water pump is provided near the feed channel, a third laser sensor is provided on the cold water pipeline between the cold water pump and the feed valve, and the third laser sensor is connected to the cold water pump and the feed valve;

[0014] The hot water system includes a hot water tank, a second temperature sensor and a heater are arranged in the hot water tank, and a hot water pump connected to a second laser sensor is provided on the hot water pipeline.

[0015] As a further implementation, the drying mechanism includes a material box, a fourth laser sensor is provided in the material box, a dryer and a humidity sensor are provided at the bottom of the material box, a hydraulic device is provided on the side wall of the material box, and the hydraulic device is connected to the humidity sensor.

[0016] As a further implementation, the liquid recovery device includes an oil-water separator and an ion exchange desalination device connected in sequence;

[0017] The ion exchange desalination device is connected to the hot water tank and the cold water tank through pipelines respectively.

[0018] As a further implementation, the ion exchange desalination device includes a reflux valve connected to a first temperature sensor, the reflux valve being connected to two sets of strong acid exchangers, decarbonizers, and strong base exchangers connected in sequence to correspond to different paths for cold water and hot water;

[0019] The strong alkali exchanger used for hot water treatment is also connected to a heating tank through a pipeline, and the heating tank is connected to a hot water tank through a pipeline.

[0020] A method for recycling and treating kitchen waste, using any of the kitchen waste recycling and treating equipment described above, comprises the following steps:

[0021] The material enters the spiral extrusion mechanism through the feed port for extrusion and filtration, and then is discharged to the crushing mechanism for crushing;

[0022] The first laser sensor controls the operation of the cold water system. The cold water pump pumps cold water to flush the material in the conveying channel, and then the material enters the centrifugal dehydration mechanism;

[0023] The centrifugal dehydration mechanism works to separate the material from the cold water, the first temperature sensor works, the material enters the flushing tank, and the cold water enters the liquid recovery device;

[0024] The hot water system works, and the hot water pump pumps hot water to flush the material in the flushing tank. After the material is flushed with hot water, it enters the centrifugal dehydration mechanism again to separate the material and hot water. The material enters the material box, and the hot water enters the liquid recovery device;

[0025] The dryer in the material box dries the material, and the extrusion device squeezes the material into blocks.

[0026] Furthermore, the liquid recovery device is connected to the cold water tank and the hot water tank, and the heater in the hot water tank is controlled by the second temperature sensor to heat the hot water to a set temperature.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The spiral extrusion mechanism of the present invention is connected to the centrifugal dehydration mechanism through a feeding channel, and a crushing mechanism is provided in the feeding channel, so that the kitchen waste is initially degreased and dehydrated by the spiral extrusion mechanism, and then the crushed kitchen waste is rinsed with cold water to remove the oil and salt, and further rinsed with hot water to remove the oil and salt, so that the oil and salt content of the kitchen waste is greatly reduced, which is beneficial to subsequent processing and prevents environmental pollution.

[0029] 2. The present invention adopts a horizontal spiral centrifugal dehydration mechanism to separate the solid and liquid of the washed kitchen waste, which not only realizes the completion of two centrifugal dehydrations in one device, but also realizes that the dehydrated kitchen waste automatically enters the flushing box or material box; on the one hand, it saves the manufacturing cost of the equipment, and on the other hand, it ensures the continuity of the device operation.

[0030] 3. The kitchen waste of the present invention moves in the device by means of a spiral mechanism, gravity and a centrifugal pump, without any interruption or manual intervention, which is beneficial to improving the working environment of workers and reducing processing costs.

[0031] 4. In the present invention, the cold water and hot water used to wash the crushed kitchen waste are separated by a centrifugal dehydration mechanism, and then pass through an oil-water separator and an ion exchange desalination device to achieve oil-water separation and brine separation, and finally return to their respective water supply tanks. This realizes the internal circulation of the kitchen waste washing water source, saves costs, improves economic benefits, reduces sewage discharge, and protects the environment.

[0032] 5. In order to solve the problem that some kitchen waste has poor crushing effect due to high moisture content, the present invention uses a spiral extrusion mechanism to dewater the kitchen waste and uses the conveying function of the spiral extrusion mechanism to transport the kitchen waste to the front of the crushing mechanism to meet the requirements of continuous operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] Figure 1 It is a schematic diagram of the overall structure of a kitchen waste recycling and processing equipment in an embodiment of the present invention.

[0035] Figure 2 2 is a schematic top view of a kitchen waste crushing device in an embodiment of the present invention.

[0036] Figure 3 It is a partially enlarged schematic diagram of the hot water tank in the embodiment of the present invention.

[0037] Figure 4 It is a partial enlarged view of the feed valve in the embodiment of the present invention.

[0038] Figure 5 Schematic diagram of the structure of the oil-water separator in an embodiment of the present invention.

[0039] Figure 6 It is a structural schematic diagram of an ion exchange desalination device in an embodiment of the present invention.

[0040] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0041] Among them: 1. Filter barrel; 2. Filter layer; 3. Spiral cone shaft; 4. Feed channel; 5. Moving tool; 6. Fixed tool; 7. Laser sensor; 8. Driven pulley; 9. Discharge port; 10. Transmission belt; 11. Driving pulley; 12. Control switch; 13. Motor; 14. Box; 15. Laser sensor; 16. Material box; 17. Humidity sensor; 18. Cold water pump; 19. Dryer; 20. Hydraulic device; 21. Feed valve; 22. Laser sensor; 23. Flushing tank; 24. Hot water pump; 25. Hot water tank; 26. Cold water tank; 27. Oil-water separator; 28. Ion exchange demineralization device; 29. ​​Drain port; 30. Temperature sensor; 31. Hollow shaft; 32. Motor; 33. Drum; 34. Housing; 35. Filtrate box; 36. Motor; 37. Feed port; 38. Motor; 39. Moving tool shaft

[0042] 251, temperature sensor; 252, heater; 211, laser sensor;

[0043] 271. De-oiling water inlet; 272. Filter layer; 273. Oil outlet; 274. Water outlet; 275. Inclined plate mechanism; 276. Device housing; 281. Return valve; 282. Water tank.

[0044] 283. Water storage tank; 284. Water pump; 285. Strong acid exchanger; 286. Decarbonizer; 287. Intermediate water tank; 288. Intermediate water pump; 289. Strong alkali exchanger; 2810. Temperature sensor; 2811. Heating tank; 2812. Heater; 2813. Hot water valve; 2814. Strong alkali exchanger; 2815. Intermediate water pump; 2816. Intermediate water tank; 2817. Decarbonizer; 2818. Strong acid exchanger; 2819. Water pump. DETAILED DESCRIPTION

[0045] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0046] Example 1

[0047] In a typical embodiment of the present invention, referring to Figures 1-6 As shown, a kitchen waste recycling and processing device includes a hot water system, a cold water system and a screw extrusion mechanism. The screw extrusion mechanism is connected to a centrifugal dehydration mechanism through a material feeding channel. A crushing mechanism is provided in the material feeding channel. A discharge port is provided at one end of the centrifugal dehydration mechanism and a water outlet is provided at the other end. The discharge port is connected to a drying mechanism and a flushing tank through a pipeline with a control switch. The water outlet is connected to a liquid recovery mechanism.

[0048] The cold water system is connected to the end of the feeding channel through a cold water pipeline with a cold water pump. The bottom of the flushing tank is connected to the cold water pipeline and is provided with a feed valve. The hot water tank is connected to the flushing tank through a hot water pipeline. A first temperature sensor is provided in the centrifugal dehydration mechanism to identify that the discharge port is connected to the drying mechanism when hot water is used and that the discharge port is connected to the flushing tank when cold water is used.

[0049] A first laser sensor is set below the crushing mechanism in the feeding channel, which is connected to the cold water system, cold water pump and spiral extrusion mechanism; a second laser sensor is set in the flushing box, which is connected to the hot water system, cold water pump and feed valve to enable the material after hot water flushing to re-enter the centrifugal dehydration mechanism.

[0050] like Figure 1-6 As shown, the kitchen waste recycling and processing equipment consists of a spiral extrusion mechanism, a crushing mechanism, a cold water system (cold water flushing system), a hot water system (hot water flushing system), a centrifugal dehydration mechanism, a liquid recovery device and a drying mechanism. The kitchen waste is initially dehydrated and deoiled by the spiral extrusion mechanism, crushed into fragments by the crushing mechanism, and processed and recycled after two flushings by the cold water and hot water systems, two dehydrations by the centrifugal dehydration mechanism and drying and briquetting by the drying mechanism.

[0051] Reference Figure 1 As shown, the spiral extrusion mechanism mainly adopts a spiral extrusion solid-liquid separator, which mainly includes a filter barrel 1, a filter layer 2, a spiral cone shaft 3, a filtrate box 35, and a motor 36.

[0052] A filter layer is arranged axially inside the filter barrel, a filtrate box is arranged at the bottom of the filter layer, a feed port is arranged at the top of the filter layer for the entry of kitchen waste, and a spiral cone shaft is arranged axially inside the filter layer. Figure 1 Taking the direction shown in the figure as an example, the diameter of the left end of the spiral cone shaft is larger than the diameter of the right end. A first driving mechanism is set outside the filter barrel at one end of the spiral cone shaft away from the material feeding channel. The first driving mechanism is an electric motor 36.

[0053] The food waste enters the spiral extrusion mechanism through feed port 37, where motor 36 rotates spiral cone shaft 3. The spiral pair around spiral cone shaft 3 acts to convey the food waste to the left, gradually reducing the space between spiral cone shaft 3 and filter layer 2. As the food waste enters the spiral extrusion mechanism, it is squeezed by the spiral cone shaft 3 and filter layer 2. The squeezing force and the effects of filter layer 2 filter most of the water from the waste, transferring it between filter layer 2 and filter barrel 1. Furthermore, this filtered water also removes some of the oil and salt from the waste.

[0054] The filtered liquid falls downward under the action of gravity. A filtrate box 35 is provided below the filter barrel 1 to collect the fallen liquid for centralized treatment to prevent environmental pollution. On the other hand, the spiral extrusion mechanism, while achieving extrusion filtration, also conveys the kitchen waste, which has been initially dehydrated and free of oil and salt, into the feed channel 4 under the action of the spiral pair of the spiral cone shaft.

[0055] like Figure 1-Figure 2 As shown, the crushing mechanism is located in the feeding channel 4 and mainly includes a movable cutter 5, a fixed cutter 6, a motor 38 and a movable cutter shaft 39.

[0056] The fixed cutter 6 is mounted on the wall of the feed channel 4. The crushing mechanism is installed in the middle section of the feed channel. The movable cutter 5 is located at the center of the cross-section of the feed channel 4 and is mounted on a movable cutter shaft 39. The motor 38 is connected to the movable cutter shaft 39, driving the movable cutter shaft 39 to rotate, which in turn drives the movable cutter 5 mounted on the movable cutter shaft 39. The interaction between the rotating movable cutter 5 and the fixed fixed cutter 6 shreds the food waste in the feed channel 4 into fragments less than 5 mm in size.

[0057] like Figure 1 As shown, the cold water system consists of a laser sensor 7, a cold water pump 18, a feed valve 21, and a cold water tank 26. The cold water tank 26 is located on one side of the centrifugal dehydration mechanism and is connected to the end of the feed channel via a cold water pipeline. The cold water pump 18 is installed on the cold water pipeline. The cold water pipeline between the cold water pump and the cold water tank is also connected to a flushing tank via a pipeline. This connection forms a three-way structure and is equipped with a feed valve 21. A laser sensor 211 is also installed next to the feed valve. The flushing tank is located near the centrifugal dehydration mechanism.

[0058] The laser sensor 7 is located below the crushing mechanism in the feed channel and is installed on the channel wall of the feed channel 4. When the crushed food waste falls along the feed channel 4, the laser sensor 7 receives information and transmits the signal to the cold water pump 18 and the feed valve 21. After receiving the signal, the feed valve 21 opens the interface to the cold water tank 26. At the same time, the cold water pump 18, which has received the signal, starts to pump water from the cold water tank 26. At this time, the cold water in the cold water tank 26 is driven by the cold water pump 18 and enters the bottom of the crushing mechanism through the pipeline, providing a cold water rinse for the crushed food waste.

[0059] Similarly, when all the kitchen waste has been cut by the crushing mechanism, no kitchen waste falls in the feeding channel 4, the laser sensor 7 receives the information and sends a signal to make the feed valve 21 close the interface connected to the cold water tank 26 and turn off the cold water pump 18, motor 36, and motor 38, stop cold water flushing, stop squeezing and dehydration, and stop crushing.

[0060] like Figure 1As shown, the centrifugal dewatering mechanism adopts a horizontal spiral centrifuge widely used in fields such as sludge dewatering, which is mainly composed of a driven pulley 8, a discharge port 9, a transmission belt 10, a driving pulley 11, a control switch 12, a motor 13, a box 14, a drain port 29, a temperature sensor 30, a hollow shaft 31, a motor 32, a drum 33 and a shell 34.

[0061] like Figure 1 As shown, the feed channel 4 is connected to the hollow center of the hollow shaft 31 in the centrifugal dehydration mechanism. After being crushed and rinsed, the food waste is converted into a solid-liquid mixture, which flows through the feed channel 4 into the hollow interior of the hollow shaft 31. The driven pulley 8, transmission belt 10, and driving pulley 11 cooperate with each other and are located on the left side of the housing 34. The driven pulley cooperates with the hollow shaft 31, and a bearing is provided between the hollow shaft 31 and the housing. The motor 13 is connected to the driving pulley 11. A motor 32 is located on the right side of the housing, and the motor output shaft is connected to the drum 33.

[0062] Motor 13 rotates hollow shaft 31 via a belt drive system consisting of driven pulley 8, drive belt 10, and driving pulley 11. Simultaneously, motor 32 rotates drum 33. When the food waste, now a solid-liquid mixture, is located within the hollow hole of hollow shaft 31, the high-speed centrifugal force immediately ejects the solid-liquid mixture from the gap in hollow shaft 31 and into drum 33. The high-speed rotation of drum 33 generates a strong centrifugal force, which propels the denser food waste fragments onto its inner wall, forming a sediment layer; the less dense liquid forms an inner liquid ring.

[0063] Because the hollow shaft 31 and the drum 33 rotate at different speeds, they move relative to each other. The relative motion of the spiral on the hollow shaft 31 and the drum 33 pushes the food waste fragments to the conical end. As the space gradually decreases, the objects in the cavity are squeezed, leaving only solid fragments, which are then discharged through the discharge port 9. The liquid overflows and flows out of the drain port 29, thus achieving solid-liquid separation of the rinsed food waste. Furthermore, a housing 34 is installed outside the hollow shaft 31 and the drum 33 to prevent the debris discharged from the discharge port 9 and the liquid discharged from the drain port 29 from affecting the operation of other mechanisms.

[0064] A discharge port is provided at the left end of the shell, and a water outlet is provided at the right end. The left end of the drum is a discharge port 9, and the right end is a drain port 29. The discharge port 9 is provided corresponding to the discharge port, and the drain port 29 is provided corresponding to the water outlet, so that the final kitchen waste can be discharged through the discharge port and the water can be discharged through the water outlet.

[0065] The discharge port is connected to the drying mechanism and the flushing tank via pipes equipped with control switches. The drying mechanism includes a material box, which is located adjacent to the flushing tank. The control switch can control the flow of food waste into the flushing tank or the material box. A laser sensor 15 is installed on the top of the material box, and a laser sensor 22 is also installed on the top of the flushing tank.

[0066] A temperature sensor 30 is provided on the inner wall of the drum of the centrifugal dehydration mechanism, and the temperature sensor 30 is connected to the control switch signal. When the temperature sensor 30 senses that cold water is flowing through, the temperature sensor 30 sends a signal to make the control switch 12 open the channel connected to the flushing box 23 and close the channel connected to the material box 16, and the kitchen waste after water is removed falls into the flushing box 23; when the temperature sensor 30 senses that hot water is flowing through, the temperature sensor 30 sends a signal to make the control switch 12 open the channel connected to the material box 16 and close the channel connected to the flushing box 23, and the kitchen waste after water is removed falls into the material box 16.

[0067] like Figure 1 、 Figure 3 、 Figure 4 As shown, the hot water system mainly consists of a cold water pump 18, a laser sensor 22, a flushing tank 23, a hot water pump 24, a hot water tank 25, a feed valve 21 and a laser sensor 211. The hot water tank is arranged adjacent to the cold water tank and is connected to the flushing tank via a hot water pipeline with a hot water pump 24.

[0068] Laser sensor 22 is mounted on the wall of flushing tank 23. When food waste, after being rinsed with cold water and centrifuged, falls, laser sensor 22 receives the information and sends a signal to activate hot water pump 24. Hot water pump 24 then draws hot water from hot water tank 25 into flushing tank 23 through a pipe, ultimately rinsing the food waste in flushing tank 23 with hot water. The oil and salt content of food waste after cold and hot water rinsing is significantly reduced.

[0069] When all the kitchen waste after cold water washing is completely centrifuged and dehydrated, no more kitchen waste falls into the washing tank 23. At this time, the laser sensor 22 receives the information and sends a signal to stop the hot water pump 24 on the one hand, and to open the interface connected to the washing tank 23 and close the interface with the cold water tank on the other hand, and to start the cold water pump 18. Under the action of the cold water pump 18, the kitchen waste after hot water washing enters the end of the crushing mechanism, that is, the entrance of the centrifugal dehydration mechanism, from the washing tank through the pipeline.

[0070] When all the kitchen waste is pumped away, the laser sensor 211 arranged next to the feed valve 21 can receive the information and send a signal to stop the cold water pump 18 and close the interface connected to the flushing box 23 of the feed valve 21.

[0071] In addition, a temperature sensor 251 and a heater 252 are installed on the hot water tank 25. When the water temperature in the hot water tank 25 is lower than 40°C, the temperature sensor 251 receives the information and sends a signal to make the heater 252 work to heat the water in the hot water tank 25. When the water temperature is higher than 50°C, the temperature sensor 251 receives the information and sends a signal to stop the heater 252, thereby ensuring that the water temperature in the hot water tank is maintained at 40°C-50°C, which is a temperature suitable for flushing and removing oil and salt.

[0072] like Figure 1 The drying mechanism is composed of a laser sensor 15, a material box 16, a humidity sensor 17, a dryer 19 and a hydraulic device 20. The humidity sensor 17 and the dryer 19 are arranged at the bottom of the material box, and the hydraulic device 20 is arranged on the right side of the material box.

[0073] The laser sensor 15 is mounted on the wall of the material box 16. When the kitchen waste after being rinsed with hot water falls into the material box 16, the laser sensor 15 receives the information and sends a signal to shut down the motor 13 and the motor 32 and start the dryer 19. The humidity in the kitchen waste decreases under the action of the dryer 19. When the kitchen waste is completely dried, the humidity sensor 17 receives the information and sends a signal to stop the dryer 19 and start the hydraulic device 20. The hydraulic device 20 compresses the kitchen waste into blocks and returns them to their initial position through hydraulic pressure. The hydraulic device of this embodiment is prior art and will not be described in detail here. Of course, it is understandable that in another example, the kitchen waste can be dried in the material box and then discharged and hydraulically operated.

[0074] like Figure 1 、 Figure 5 、 Figure 6 As shown, the liquid recovery device consists of a hot water tank 25, a cold water tank 26, an oil-water separator 27, an ion exchange desalination device 28 and a temperature sensor.

[0075] The oil-water separator 27 consists of a de-oiling inlet 271, a filter layer 272, an oil outlet 273, a water outlet 274, a sloping plate mechanism 275, and a housing 276. The de-oiling inlet 271 is located at the top of one side of the housing, while the water outlet 274 is located at the top of the other side. The filter layer 272 is positioned near the de-oiling inlet 271. Four baffles create an S-shaped internal channel. The sloping plate mechanism 275 is located between the two middle baffles, with the oil outlet 273 located at the top of the sloping plate mechanism 275.

[0076] Liquid discharged from drain port 29 passes through the outlet of the centrifugal dehydration mechanism housing and enters the interior of oil-water separator 27 through oil removal inlet 271. After passing through filter layer 272 to remove any impurities, due to the different densities of oil and water, the oil in the liquid remains on the surface of the water layer with the help of inclined plate mechanism 275, while the liquid below the oil flows along the channel at the bottom of the device housing 276, and finally flows into the ion exchange demineralization device 28 at the rear through outlet 274. The inclined plate mechanism is a single inclined plate.

[0077] The ion exchange desalination device 28 consists of a reflux valve 281, a water storage tank 282, a water storage tank 283, a water pump 284, a strong acid exchanger 285, a decarbonizer 286, an intermediate water tank 287, an intermediate water pump 288, a strong alkali exchanger 289, a temperature sensor 2810, a heating box 811, a heater 2812, a hot water valve 2813, a strong alkali exchanger 2814, an intermediate water pump 2815, an intermediate water tank 2816, a decarbonizer 2817, a strong acid exchanger 2818 and a water pump 2819.

[0078] Water tank 282, water pump 2819, strong acid exchanger 2818, decarbonizer 2817, intermediate water tank 2816, intermediate water pump 2815, and strong alkali exchanger 2814 are connected in sequence. The end of strong alkali exchanger 2814 is connected to a cold water tank. Water tank 283, water pump 284, strong acid exchanger 285, decarbonizer 286, intermediate water tank 287, intermediate water pump 288, and strong alkali exchanger 289 are connected in sequence. Water tanks 282 and 283 are each connected to a reflux valve 281.

[0079] When the temperature sensor 30 in the centrifugal dehydration mechanism senses that the water temperature is cold water, the reflux valve 281 opens the pipe interface connected to the water tank 282 and closes the pipe interface connected to the water tank 283. At this time, the liquid entering the water tank 282 enters the strong acid exchanger 2818 under the action of the water pump 2819. The liquid undergoes strong acidic hydrogen-type resin in the strong acid exchanger 2818 to remove various cations (except hydrogen) in the water, and then enters the decarbonizer 2817. After air is injected into the decarbonizer to discharge CO2, it enters the intermediate water tank 2816. The liquid in the intermediate water tank enters the strong base exchanger 2814 under the action of the intermediate water pump 2815. The liquid undergoes strong alkaline hydroxide-type anion exchange resin in the strong acid exchanger 2818 to remove various anions (except hydroxide ions) in the water, and then flows back to the cold water tank, ultimately achieving the task of removing most of the salt in the water.

[0080] Similarly, when temperature sensor 30 senses hot water, reflux valve 281 opens the pipe connection to water tank 283 and closes the pipe connection to water tank 282. The only difference is that the liquid passes through water pump 284, strong acid exchanger 285, decarbonizer 286, intermediate water tank 287, intermediate water pump 288, and strong base exchanger 289 before entering heating tank 2811, where it is heated to 45°C by heater 2812. When the water temperature reaches 45°C, temperature sensor 2810 sends a signal to open the hot water valve, allowing the desalinated liquid to return to the hot water tank to prevent a sudden drop in the water temperature in the hot water tank, which would affect hot water flushing. The liquid recovery device dehydrates and desalinates the separated liquid and returns it to the water supply tank, thus recycling the internal water source, saving costs and protecting the environment.

[0081] It is understandable that, in another optional example, the ion exchange desalination device 28 can also be provided with only one set of treatment structures, without the need to use two sets of treatment structures due to the difference between cold water and hot water. In the case of one set of treatment structures, the heating tank is set at the end, and when the water is cold, the hot water valve only needs to open the pipe connected to the cold water tank. It should be noted that, considering the long reaction time of cold water or hot water entering the ion exchange desalination device 28, the hot water may eventually become cold water, resulting in the use of one set of treatment structures causing the heater to heat the water into hot water and pass it into the hot water tank. This method can manually control the amount of water in the hot water tank and the cold water tank by setting valves to ensure that there is sufficient water in the hot water tank and the cold water tank.

[0082] In this embodiment, the ion exchange desalination device 28 is preferably provided with two sets of processing structures.

[0083] Example 2

[0084] The following steps are involved:

[0085] The kitchen waste enters the spiral extrusion mechanism mentioned in the above example through the feed port. In the spiral extrusion mechanism, the kitchen waste is squeezed to remove most of the water and part of the oil and salt and is sent to the feed channel 4 to facilitate the crushing of the kitchen waste.

[0086] Furthermore, the crushing mechanism mentioned in the above example is located in the feeding channel 4. The spirally extruded kitchen waste slides into the crushing mechanism along the feeding channel 4, and the kitchen waste is crushed into fragments with a diameter of less than 5 mm under the interaction of the movable tool 5 and the fixed tool 6.

[0087] Furthermore, when the kitchen waste crushed by the crushing mechanism falls downward along the feeding channel 4 , the cold water flushing system mentioned in the above example starts to work, so that the kitchen waste is flushed with cold water in the feeding channel 4 .

[0088] Furthermore, the kitchen waste rinsed with cold water enters the centrifugal dehydration mechanism mentioned in the above example through the feed channel 4. Under the action of the temperature sensor 30 in the centrifugal dehydration mechanism, the dehydrated material enters the flushing tank 23, and the separated liquid returns to the water supply tank through the liquid recovery device mentioned in the above example.

[0089] Furthermore, when the kitchen waste that has been centrifugally dehydrated enters the flushing box 23, the hot water flushing system mentioned in the above example starts to work. Under the action of the hot water flushing system, the kitchen waste is flushed with hot water and transported to the feed channel 4.

[0090] Furthermore, the kitchen waste after being rinsed with hot water enters the centrifugal dehydration mechanism again through the feeding channel 4. Under the action of the temperature sensor 30, the kitchen waste after dehydration enters the material box 16, and the separated liquid returns to the water supply tank through the liquid recovery device.

[0091] Furthermore, when the kitchen waste begins to fall into the material box, the drying and squeezing system mentioned in the above example starts to work, drying and briquetting the kitchen waste falling into the material box 16, and finally realizing the processing and recycling of the kitchen waste.

[0092] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A kitchen waste recycling and processing equipment, characterized in that: It includes a hot water system, a cold water system and a screw extrusion mechanism. The screw extrusion mechanism is connected to the centrifugal dehydration mechanism through a feeding channel. A crushing mechanism is provided in the feeding channel. A discharge port is provided at one end of the centrifugal dehydration mechanism and a water outlet is provided at the other end. The discharge port is connected to the drying mechanism and the flushing box respectively through a pipeline with a control switch. The water outlet is connected to a liquid recovery device. The cold water system is connected to the end of the feeding channel through a cold water pipeline with a cold water pump. The bottom of the flushing tank is connected to the cold water pipeline and is provided with a feed valve. The hot water tank is connected to the flushing tank through a hot water pipeline. A first temperature sensor is provided in the centrifugal dehydration mechanism to identify that the discharge port is connected to the drying mechanism when hot water is used and that the discharge port is connected to the flushing tank when cold water is used. A first laser sensor is installed below the crushing mechanism in the feeding channel to obtain food waste signals to control the operation of the cold water system, cold water pump and spiral extrusion mechanism; a second laser sensor is installed in the flushing box to obtain food waste signals to control the operation of the hot water system, cold water pump and feed valve, so that the material after hot water flushing can re-enter the centrifugal dehydration mechanism; The spiral extrusion mechanism includes a filter barrel, a filter layer is axially arranged inside the filter barrel, a filtrate box is arranged at the bottom of the filter layer, a feed port is arranged on the filter layer, a spiral cone shaft is arranged in the filter layer, and a first driving mechanism is arranged at one end of the spiral cone shaft away from the feed channel; The crushing mechanism is arranged in the middle section of the feeding channel; A fixed tool is fixed on the wall of the feeding channel, a movable tool shaft is provided at the center of the cross section, the movable tool shaft is provided with a movable tool, and the movable tool shaft is connected to the second driving mechanism; The centrifugal dehydration mechanism adopts a horizontal spiral centrifuge, which includes an outer shell, and the discharge port and the water outlet are arranged at both ends of the outer shell; the liquid recovery device includes an oil-water separator and an ion exchange desalination device connected in sequence; The ion exchange desalination device is connected to the hot water tank and the cold water tank through pipelines respectively; the ion exchange desalination device includes a reflux valve connected to a first temperature sensor, and the reflux valve is connected to two sets of strong acid exchangers, decarbonizers, and strong base exchangers connected in sequence to correspond to different paths of cold water and hot water; The strong alkali exchanger used for hot water treatment is also connected to the heating tank through a pipeline, and the heating tank is connected to the hot water tank through a pipeline; The oil-water separator consists of an oil removal water inlet, a filter layer, an oil outlet, a water outlet, an inclined plate mechanism and a device casing; the oil removal water inlet is arranged at the top of one side of the device casing, the water outlet is arranged at the top of the other side, the filter layer is arranged close to the oil removal water inlet, and the device forms an "S"-shaped channel inside through four partitions. The inclined plate mechanism is arranged between the two middle partitions, and the oil outlet is arranged at the top of the inclined plate mechanism.

2. The kitchen waste recycling and processing equipment according to claim 1, characterized in that: The cold water system includes a cold water tank, the bottom of the cold water tank is connected to a cold water pipeline, a cold water pump is arranged near the material delivery channel, a third laser sensor is arranged on the cold water pipeline between the cold water pump and the feed valve, and the third laser sensor is connected to the cold water pump and the feed valve; The hot water system includes a hot water tank, a second temperature sensor and a heater are arranged in the hot water tank, and a hot water pump connected to a second laser sensor is provided on the hot water pipeline.

3. The kitchen waste recycling and processing equipment according to claim 2, characterized in that: The drying mechanism includes a material box, a fourth laser sensor is arranged in the material box, a dryer and a humidity sensor are arranged at the bottom of the material box, a hydraulic device is arranged on the side wall of the material box, and the hydraulic device is connected to the humidity sensor.

4. A method for recycling and treating kitchen waste, characterized in that: The kitchen waste recycling and processing equipment according to any one of claims 1 to 3 is used, comprising the following steps: The material enters the spiral extrusion mechanism through the feed port for extrusion and filtration, and then is discharged to the crushing mechanism for crushing; The first laser sensor controls the operation of the cold water system. The cold water pump pumps cold water to flush the material in the conveying channel, and then the material enters the centrifugal dehydration mechanism; The centrifugal dehydration mechanism works to separate the material from the cold water, the first temperature sensor works, the material enters the flushing tank, and the cold water enters the liquid recovery device; The hot water system works, and the hot water pump pumps hot water to flush the material in the flushing tank. After the material is flushed with hot water, it enters the centrifugal dehydration mechanism again to separate the material and hot water. The material enters the material box, and the hot water enters the liquid recovery device; The dryer in the material box dries the material, and the extrusion device squeezes the material into blocks.

5. A method for recycling kitchen waste according to claim 4, characterized in that: The liquid recovery device is connected to the cold water tank and the hot water tank. The heater in the hot water tank is controlled by the second temperature sensor to heat the hot water to a set temperature.

Images