Improved waste oil treatment device

Abstract

This utility model provides an improved waste oil treatment device, belonging to the field of mechanical technology, which solves the problem of poor performance of existing waste oil treatment devices. The improved waste oil treatment device includes: a silo storing material, with a conveyor horizontally positioned below it, and a shaftless screw conveyor inside; a pulper located at the tail of the conveyor, which receives the material conveyed by the conveyor and pulps it to obtain slurry; a slurry pool is installed at the bottom of the pulper for storing the slurry; a heating tank receiving the slurry from the slurry pool and heating and maintaining the slurry temperature; after the slurry settles, oil and water are separated to obtain a first portion of oil and water residue; and a three-phase centrifuge receiving the water residue output from the heating tank and performing three-phase separation to obtain a second portion of oil. This utility model features excellent performance.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an improved waste oil treatment device, particularly an improved waste oil treatment device with a high oil extraction rate. Background Technology

[0002] Waste oil mainly comes from food waste treatment (kitchen scrap treatment), which involves processing and refining greasy floating matter in sewers or leftover food from hotels and restaurants. To fundamentally solve the problem of urban food waste and achieve the goals of energy conservation, emission reduction, and waste resource utilization, it is essential to conduct in-depth research on the harmless treatment and resource utilization technologies of food waste, significantly improve resource recycling efficiency and product added value, and promote the recycling of food waste.

[0003] The current conventional method for treating waste oil is to first remove impurities, then heat it for solid-liquid separation. The solid phase is transported off-site for incineration, while the liquid phase is sent to a centrifuge for three-phase separation. However, this method has the following drawbacks: First, both the impurities removed and the solid phase from solid-liquid separation are adsorbed with a large amount of oil. This oil is directly transported off-site for incineration without undergoing oil removal treatment, resulting in a low oil extraction rate and some economic loss. Second, the liquid phase in solid-liquid separation is entirely separated into three phases using a centrifuge, which increases the processing capacity of the centrifuge, thereby increasing energy consumption and costs.

[0004] In summary, to address the structural shortcomings of existing waste oil treatment equipment, this utility model presents an improved waste oil treatment device with a reasonable structure and good performance. Summary of the Invention

[0005] This invention addresses the problems existing in the prior art by providing an improved waste oil treatment device with a reasonable structure and good performance.

[0006] The objective of this utility model can be achieved through the following technical solution: an improved waste oil treatment device, comprising:

[0007] A silo stores materials, and a conveyor is installed horizontally below it, with a shaftless screw inside the conveyor;

[0008] A pulper is located at the tail of the conveyor. The pulper receives the material conveyed by the conveyor and pulps it to obtain slurry. A slurry tank for storing the slurry is installed at the bottom of the pulper.

[0009] The heating tank receives the slurry from the slurry pool and heats and keeps the slurry at a certain temperature. After the slurry settles, oil and water are separated to obtain the first part of the grease and water residue.

[0010] A three-phase centrifuge receives water-sludge material output from a heating tank and performs three-phase separation to obtain the second part of grease.

[0011] As a further improvement to this invention, the bottom of the silo is inclined, the front end of the conveyor is connected to the silo through the first feeding pipe, and the tail end of the conveyor is connected to the pulper through the second feeding pipe.

[0012] As a further improvement in this case, the heating tank includes an outer tank and an inner tank, with a hollow space between the inner and outer tanks. A heating tube is wound around the periphery of the inner tank, and water vapor flows inside the heating tube. An input pipe and an output pipe communicating with the heating tube are installed on the outer wall of the outer tank.

[0013] As a further improvement to this invention, a motor is fixedly installed on the top of the heating tank, and the output shaft of the motor is vertically connected to a stirring shaft. Several stirring blades are arranged alternately around the stirring shaft, and each stirring blade is arranged in a spindle shape.

[0014] As a further improvement in this case, the bottom of the heating tank is conical, a level transmitter is installed near the outlet of the heating tank, and a first discharge pipe and a second discharge pipe are connected in parallel at the outlet of the heating tank.

[0015] Compared with the prior art, the present invention has a reasonable structural design. The combination of the conveyor and the pulper facilitates the priority crushing of materials. After being heated and allowed to settle in a heating tank, the first part of the oil is separated, completing the initial oil-water separation. Then, the remaining second part of the oil is extracted by a three-phase centrifuge, extracting as much oil as possible from the material and improving the oil extraction rate. Moreover, the first part of the oil can be sold directly as a finished product, reducing the processing load of the subsequent three-phase centrifuge, reducing processing energy consumption, lowering costs, and achieving good results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 yes Figure 1 A partial structural diagram.

[0018] Figure 3 This is a schematic diagram of the heating tank in this utility model.

[0019] In the diagram, 10 is the silo; 20 is the conveyor; 21 is the first feeding pipe; 22 is the second feeding pipe; 23 is the shaftless screw conveyor; 30 is the pulper; 31 is the slurry tank; 40 is the heating tank; 41 is the outer tank; 42 is the inner tank; 43 is the heating pipe; 44 is the input pipe; 45 is the output pipe; 46 is the exhaust pipe; 51 is the motor; 52 is the stirring shaft; 521 is the stirring blade; 53 is the level transmitter; 54 is the first discharge pipe; 55 is the second discharge pipe; and 60 is the three-phase centrifuge. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0021] like Figures 1 to 3 As shown, this improved waste oil treatment device includes:

[0022] The silo 10 stores materials, and a conveyor 20 is horizontally installed below it. A shaftless screw 23 is installed inside the conveyor 20.

[0023] The pulper 30 is located at the tail of the conveyor 20. The pulper 30 receives the material conveyed by the conveyor 20 and pulps it to obtain slurry. A slurry tank 31 for storing slurry is installed at the bottom of the pulper 30.

[0024] Heating tank 40 receives slurry from slurry tank 31 and heats and keeps the slurry at a certain temperature. After the slurry is allowed to stand, oil and water are separated to obtain the first part of oil and water residue.

[0025] The three-phase centrifuge 60 receives the water slag material output from the heating tank 40 and performs three-phase separation on the water slag material to obtain the second part of grease.

[0026] The current conventional method for treating waste oil is to first remove impurities, then heat it for solid-liquid separation. The solid phase is transported off-site for incineration, while the liquid phase is sent to a centrifuge for three-phase separation. However, this method has the following drawbacks: First, both the impurities removed and the solid phase from solid-liquid separation are adsorbed with a large amount of oil. This oil is directly transported off-site for incineration without undergoing oil removal treatment, resulting in a low oil extraction rate and some economic loss. Second, the liquid phase in solid-liquid separation is entirely separated into three phases using a centrifuge, which increases the processing capacity of the centrifuge, thereby increasing energy consumption and costs.

[0027] Therefore, this utility model provides an improved waste oil treatment device. By cooperating with the conveyor 20 and the pulper 30, the material is preferentially crushed and then heated and allowed to stand in the heating tank 40 to separate the first part of the oil, completing the initial oil-water separation. Then, the remaining second part of the oil is extracted by the three-phase centrifuge 60, extracting as much oil as possible from the material and improving the oil extraction rate. Moreover, the first part of the oil can be sold directly as a finished product, reducing the processing load of the subsequent three-phase centrifuge 60, reducing processing energy consumption, lowering costs, and achieving good results.

[0028] Preferably, the bottom of the hopper 10 is inclined, the front end of the conveyor 20 is connected to the hopper 10 through the first feeding pipe 21, and the tail end of the conveyor 20 is connected to the pulper 30 through the second feeding pipe 22.

[0029] Specifically, the bottom of the hopper 10 is inclined to facilitate the material entering the conveyor 20 along the hopper 10. Preferably, both ends of the conveyor 20 are connected to the hopper 10 and the pulper 30 through feeding pipes, which facilitates the orderly feeding of the material into the pulper 30 in accordance with the rotation frequency of the shaftless screw 23 inside the conveyor 20, avoiding blockage. Furthermore, the shaftless screw 23 can further prevent blockage from occurring inside the conveyor 20 when conveying materials.

[0030] Furthermore, the heating tank 40 includes an outer tank 41 and an inner tank 42. The inner tank and the outer tank 41 are hollow. A heating tube 43 is wound around the side of the inner tank 42, and water vapor flows inside the heating tube 43. An input tube 44 and an output tube 45 communicating with the heating tube 43 are installed on the outer wall of the outer tank 41.

[0031] In this embodiment, the heating tank 40 preferably adopts a double-layer tank form, and the space between the inner tank and the outer tank 41 is hollow, which is beneficial for heat preservation of the heating tank 40.

[0032] Here, it is preferable to heat the inner tank 42 by introducing water vapor into the heating pipe 43. It is also preferable to install an input pipe 44 and an output pipe 45 for conveying water vapor on the outer wall of the outer tank 41. The water vapor in the heating pipe 43 can flow from top to bottom or from bottom to top, which is not limited here.

[0033] Preferably, a motor 51 is fixedly mounted on the top of the heating tank 40, and a stirring shaft 52 is fixedly connected to the output shaft of the motor 51 vertically downward. Multiple stirring blades 521 are arranged alternately around the stirring shaft 52, and each stirring blade 521 is arranged in a spindle shape.

[0034] In this embodiment, the stirring blades 521 are preferably arranged in an alternating pattern around the stirring shaft 52 to increase the actual stirring range. This is beneficial for fully stirring the slurry inside the heating tank 40 and for allowing the oil inside the slurry to float to the top layer, so that the slurry can be separated into layers after settling to obtain a relatively pure first part of oil.

[0035] Here, the stirring blades 521 are preferably arranged in a shuttle-like shape, which can reduce the resistance during stirring, facilitate the stirring effect of the stirring shaft 52, and help the oil to float on the surface of the slurry as much as possible during the stirring process.

[0036] Furthermore, the bottom of the heating tank 40 is conical, a level transmitter 53 is installed near the outlet of the heating tank 40, and a first discharge pipe 54 and a second discharge pipe 55 are connected in parallel at the outlet of the heating tank 40.

[0037] The heating tank 40 is preferably designed with a conical bottom for easy material discharge. The level transmitter 53 can measure and provide feedback on the grease and water residue. The operator can discharge the water residue and output the grease based on the specific liquid information. The resulting grease is the first part of the grease, which can be directly transported to the finished product tank (not shown in the figure).

[0038] The heating tank 40 is equipped with a first discharge pipe 54 and a second discharge pipe 55 at the bottom. When the heating tank 40 is allowed to settle and separate into layers, the grease floats on the upper layer of the water slag. At this time, the first discharge pipe 54 is opened and the water slag is discharged first. When the liquid level transmitter 53 detects the change in the specific gravity of the internal liquid, the first discharge pipe 54 is closed and the second discharge pipe 55 is opened to discharge the grease.

[0039] The water-slag material continues to be fed to the three-phase centrifuge 60 for oil, water and slag separation to obtain the second part of grease, which is then conveyed to the finished product tank.

[0040] It is worth mentioning that an exhaust pipe 46 connected to the inner tank 42 is installed on the top of the heating tank 40, which can draw out the gas generated at high temperature inside the heating tank 40 and deodorize it, thereby improving the production environment.

[0041] This improved waste oil treatment device, through the coordinated arrangement of conveyor 20 and pulper 30, facilitates the priority crushing of materials. After being heated and allowed to settle in heating tank 40, the first part of the oil is separated, completing the initial oil-water separation. Then, the remaining second part of the oil is extracted by three-phase centrifuge 60, extracting as much oil as possible from the material and improving the oil extraction rate. Moreover, the first part of the oil can be sold directly as a finished product, reducing the processing load of the subsequent three-phase centrifuge 60, reducing processing energy consumption, lowering costs, and achieving good results.

[0042] The processing device of this invention crushes the recycled waste oil, ensuring that the particle size is below φ10mm. The solid phase in the waste oil is extracted by heating and then separated by a three-phase centrifuge 60, which avoids the loss of oil phase remaining on large solid particles during the impurity removal stage, and can extract the oil from the waste oil to the maximum extent, thereby increasing the oil yield. Part of the oil is separated by heating and settling, and the remainder is separated by three-phase centrifugation, which effectively reduces the processing load of the three-phase centrifuge 60 and reduces processing energy consumption and cost.

[0043] The embodiments described herein are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or additions to the specific embodiments described, or substitutions made by those skilled in the art, should be covered within the scope of protection of the present invention.

Claims

1. An improved waste oil treatment device, characterized in that, include: A silo stores materials, and a conveyor is installed horizontally below it, with a shaftless screw inside the conveyor; A pulper is located at the tail of the conveyor. The pulper receives the material conveyed by the conveyor and pulps it to obtain slurry. A slurry tank for storing the slurry is installed at the bottom of the pulper. The heating tank receives the slurry from the slurry pool and heats and keeps the slurry at a certain temperature. After the slurry settles, oil and water are separated to obtain the first part of the grease and water residue. A three-phase centrifuge receives water-sludge material output from a heating tank and performs three-phase separation to obtain the second part of grease.

2. The improved waste oil treatment device according to claim 1, characterized in that, The bottom of the silo is inclined, the front end of the conveyor is connected to the silo through the first feeding pipe, and the tail end of the conveyor is connected to the pulper through the second feeding pipe.

3. The improved waste oil treatment device according to claim 1, characterized in that, The heating tank includes an outer tank and an inner tank, with a hollow space between the inner and outer tanks. A heating tube is wound around the periphery of the inner tank, and water vapor flows inside the heating tube. An input pipe and an output pipe communicating with the heating tube are installed on the outer wall of the outer tank.

4. An improved waste oil treatment device according to claim 3, characterized in that, A motor is fixed to the top of the heating tank. The output shaft of the motor is vertically connected to a stirring shaft. Several stirring blades are arranged alternately around the stirring shaft, and each stirring blade is arranged in a spindle shape.

5. An improved waste oil treatment device according to claim 3, characterized in that, The bottom of the heating tank is conical, and a level transmitter is installed near the outlet of the heating tank. A first discharge pipe and a second discharge pipe are connected in parallel at the outlet of the heating tank.

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