Wax cake oil recovery device and dewaxing equipment

Abstract

The utility model discloses a wax cake oil recovery device and dewaxing equipment, and the wax cake oil recovery device realizes efficient recovery and reutilization of grease in a wax cake through a circulating oil system, a filtering system and a recovered oil drying system. The circulating oil system remelts and mixes the first wax cake to obtain oil wax liquid; the filtering system is used for separating out first grease through a filter and further extruding the second wax cake by using steam and compressed air to extract more grease; and the recovered oil drying system is used for drying the extracted second grease, so that the second grease reaches the refluxing standard. Therefore, the grease recovery rate is increased, waste is reduced, and meanwhile, through cyclic utilization and drying treatment, the quality of recovered grease and the operation efficiency of equipment are improved. Furthermore, the dewaxing efficiency of the dewaxing equipment comprising the wax cake oil recovery device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of grease dewaxing, especially relates to a wax cake oil recovery device and dewaxing equipment. BACKGROUND

[0002] In the grease dewaxing process, the wax cake usually contains a high proportion of oil, and the oil content can be as high as 40%-50%. These high-oil-content wax cakes are considered waste, not only causing resource waste, but also increasing the cost of waste disposal. In addition, the filter aid contained in the wax cake has not been effectively recycled, further increasing the production cost in the dewaxing process.

[0003] In the prior art, the common methods include filter aid filtration, urea inclusion and crystallization, filtration, separation of triglycerides, urea inclusion resolution, separation of wax esters, and recovery of urea. These methods are mainly used for the purification of plant wax and belong to the process category of refined plant wax, and the process route is relatively complex and lengthy. Although these methods can effectively reduce the oil content in the wax cake in some specific applications, they are not suitable for the needs of industrial dewaxing plants, especially in reducing the oil content of the wax cake and recycling the filter aid. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a wax cake oil recovery device and dewaxing equipment for realizing efficient recovery and reuse of oil in wax cake.

[0005] The utility model solves the technical problems thereof by adopting the following technical scheme:

[0006] A wax cake oil recovery device, comprising: a circulating oil system for remelting and mixing a first wax cake to obtain an oil wax liquid; a filtration system comprising a filter, the filter being used to filter the oil wax liquid to obtain a second wax cake and a first oil, and the first oil separated by filtration is returned to the circulating oil system; the filter has a steam inlet and a compressed air inlet, a compressed air source and a steam source are respectively introduced into the steam inlet and the compressed air inlet, the compressed air source and the steam source are used to extrude the second wax cake when the second wax cake reaches a predetermined thickness to obtain a second oil; a recovered oil drying system comprising a temporary storage tank and a drying device, the temporary storage tank is used to store the second oil, and the drying device is used to dry the second oil and return the dried oil to the circulating oil system.

[0007] Further, the circulating oil system comprises a hopper auger, a circulating oil tank and a first oil pump; the hopper auger is used to crush the first wax cake and convey it into the circulating oil tank, and the first oil pump is used to output the oil wax liquid in the circulating oil tank to the filtration system for filtration.

[0008] Further, the circulating oil tank comprises a steam heating coil, a first agitator and a feeding port, the steam heating coil is matched with the agitator and used for heating the first wax cake in the circulating oil tank.

[0009] Further, the steam heating coil is used for heating the first wax cake to 60 DEG C, so that the first wax cake is completely melted.

[0010] Further, the oil wax liquid is mixed with a filter aid.

[0011] Further, the filter system further comprises a discharge valve;

[0012] The discharge valve is used for discharging the second wax cake into a wax cake room or into a recovered oil tank;

[0013] The recovered oil tank is provided with a second agitator, which is used for beating the diluted second wax cake into a filter aid tank, and the filter aid tank is used for recovering the filter aid.

[0014] Further, the drying device comprises a drying tank and a second oil pump, and the second oil pump is used for pumping the second grease in the temporary storage tank into the drying tank for drying.

[0015] Further, the filter machine is a vertical blade filter machine.

[0016] Further, the drying tank is a vacuum drying tank.

[0017] A dewaxing equipment comprising the wax cake oil recovery device.

[0018] The beneficial effects of the utility model are as follows:

[0019] The wax cake oil recovery device of the utility model realizes efficient recovery and recycling of grease in wax cakes by setting a circulating oil system, a filter system and a recovered oil drying system. The circulating oil system remelts and mixes the first wax cake to obtain an oil wax liquid; the filter system separates the first grease through a filter machine and further extrudes the second wax cake by using steam and compressed air to extract more grease; and the recovered oil drying system dries the extracted second grease to meet the recyclable standard. Thus, the grease recovery rate is improved, and waste is reduced. Meanwhile, through recycling and drying treatment, the quality of recovered grease and the operation efficiency of the equipment are improved. Further, the dewaxing equipment comprising the wax cake oil recovery device improves the dewaxing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below in combination with the drawings and examples.

[0021] Figure 1 It is the whole structure schematic diagram of the utility model;

[0022] Figure 2 is a connection diagram of the circulating oil system of the utility model;

[0023] Figure 3 is a connection diagram of the filtering system of the utility model;

[0024] Figure 4 is a connection diagram of the recycled oil drying system of the utility model.

[0025] Among them,

[0026] 100, circulating oil system;110, hopper auger;120, circulating oil tank;130, steam heating coil;140, first agitator;150, feed inlet;160, first oil pump;

[0027] 200, filtering system;210, filter;211, steam inlet;212, compressed air inlet;213, discharge valve;220, recycled oil tank;221, second agitator;

[0028] 300, recycled oil drying system;310, temporary storage tank;320, drying device;321, drying tank;322, second oil pump. DETAILED DESCRIPTION

[0029] The concept, specific structure and generated technical effects of the utility model will be described clearly and completely in combination with embodiments and drawings, so that the purpose, features and effects of the utility model can be fully understood. Obviously, the described embodiments are only part of the embodiments of the utility model, not all embodiments, and other embodiments obtained by those skilled in the art without creative labor based on the embodiments of the utility model all belong to the protection scope of the utility model. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation. The technical features in the creation of the utility model can be interactively combined without mutual contradiction and conflict.

[0030] In the process of dewaxing in the oil dewaxing plant, wax can be crystallized at low temperature, but if the process parameters such as cooling speed and crystallization temperature are not properly controlled, the crystallization of wax is not sufficient. For example, when the cooling speed is too fast, the wax crystal formation time is too short, and the wax crystal does not have enough time to grow and perfect the structure, so it will wrap a large amount of oil. The oil content of the wax cake formed can be as high as 40%-50%, and the wax cake is called waste, and the oil content in the wax cake is high, the utility model increases the wax cake oil recovery device on the basis of the existing dewaxing equipment, which is used for recovering oil in the wax cake. By treating the oil-containing wax cake, the oil resource is saved, and the production cost is reduced.

[0031] Referring to Figures 1-4 A wax cake oil recovery device, comprising: a circulating oil system 100 for remelting and mixing the first wax cake to obtain an oil wax liquid; a filtering system 200 comprising a filter 210 for filtering the oil wax liquid to obtain a second wax cake and a first oil and fat, and returning the first oil and fat separated by filtering to the circulating oil system 100; the filter 210 has a steam inlet 211 and a compressed air inlet 212, and a compressed air source and a steam source are respectively connected to the steam inlet 211 and the compressed air inlet 212, the compressed air source and the steam source are used to extrude the second wax cake when the second wax cake reaches a predetermined thickness to obtain a second oil and fat; a recovered oil drying system 300 comprising a temporary storage tank 310 and a drying device 320, the temporary storage tank 310 is used to store the second oil and fat, and the drying device 320 is used to dry the second oil and fat and return the dried oil and fat to the circulating oil system 100.

[0032] It can be understood that the circulating oil system 100 remelts and mixes the first wax cake to form a first oil wax liquid, so that the oil and fat in the first wax cake is separated from the wax, and then the oil and fat is filtered out by the filtering system 200 to form a second filter cake, and further by the compressed air source and the steam source provided by the filter 210, the compressed air is first connected, then the steam is connected, the filter cake is blown dry, the oil and fat in the second filter cake is further extruded, and a second oil wax liquid is formed. Therefore, by using the wax cake oil recovery device of the utility model, the oil and fat content in the wax cake can be reduced, thereby reducing waste and improving utilization rate.

[0033] The filter 210 is a vertical blade filter 210. The vertical blade filter 210 is a high-efficiency solid-liquid separation equipment, which is commonly used in liquid filtration processes in chemical, food, pharmaceutical and petroleum industries. It is composed of a vertically installed cylindrical shell and multiple layers of filter leaves inside, which are usually made of metal mesh or other filter materials and fixed on a central support shaft. Its working principle is as follows:

[0034] S1. Feeding: the liquid containing solid particles enters the filter 210 through the feeding port 150.

[0035] S2. Filtering: the liquid passes through the filter leaves under pressure, and the solid particles are trapped on the surface of the filter leaves to form a filter cake.

[0036] S3. Liquid discharge: the filtered clear liquid flows out through the pores on the filter leaves and is discharged from the equipment through the pipeline.

[0037] S4. Residue discharge: when the filter cake accumulates to a certain thickness, the filtering process stops, and the solid particles on the filter leaves are stripped from the surface of the filter leaves by mechanical or pneumatic devices and discharged from the equipment.

[0038] Thus, by the vertical blade filter 210, the oil wax liquid is filtered to obtain the first oil and the second filter cake in step S2. In step S4, the compressed air and the steam are introduced to dry the filter cake and further squeeze the oil in the second filter cake.

[0039] The second oil after the steam squeezing still contains a certain amount of water, and after drying, the water in the oil is removed. At this time, the oil can be transported to the crystallization tank of the dewaxing process for crystallization.

[0040] The second filter cake obtained after steam squeezing can be recycled or transported to the waste cake room for waste treatment.

[0041] In some embodiments, the circulating oil system 100 includes a hopper auger 110, a circulating oil tank 120, and a first oil pump 160; the hopper auger 110 is used to crush the first wax cake and transport it into the circulating oil tank 120, and the first oil pump 160 is used to output the oil wax liquid in the circulating oil tank 120 to the filter system 200 for filtering.

[0042] The hopper auger 110 is also called a screw conveyor, which is a mechanical device that uses a motor to drive the screw to rotate and push the material to achieve the purpose of conveying. It is composed of a hopper, a screw shaft (auger), a machine shell, a driving device, etc. The hopper is used for storage and feeding, the screw shaft is the core component, the machine shell plays a protective and guiding role in the direction of material conveying, and the driving device provides power for the rotation of the screw shaft. The first wax cake is crushed into oil wax liquid by the hopper auger, and the oil wax liquid is then transported into the circulating oil tank 120 for standby.

[0043] Further, with reference to Figure 2 , the circulating oil tank 120 includes a steam heating coil 130, a first agitator 140, and a feed inlet 150. The steam heating coil cooperates with the agitator to heat the first wax cake in the circulating oil tank 120. By heating, the viscosity of the first wax cake can be effectively reduced, promoting complete dissolution and uniform mixing of the wax cake, thereby improving the efficiency of subsequent filtering and oil recovery. At the same time, the first agitator 140 can ensure uniform heating of the wax cake during heating, avoiding local overheating or insufficient dissolution, accelerating heat conduction, improving heating speed, and further improving the effect and stability of oil recovery. Specifically, the steam heating coil is used to heat the first wax cake to 60°C to completely melt the first wax cake.

[0044] Further, in order to improve the efficiency and effect of the filtering process, a filter aid is mixed in the oil wax liquid. The filter aid forms a porous filter layer, maintains the water permeability of the filter medium, prevents the filter medium from being blocked, and thus improves the clarity of the filtrate and the filtering speed. The filter aid can be one of diatomite, perlite, cellulose, activated carbon, and bentonite. By adding the filter aid, the recovery rate of oil and wax is improved, the processing amount of waste wax cake is reduced, and the cost and environmental pressure of waste treatment are reduced.

[0045] Further, referring to Figure 3 , the filtering system 200 further comprises a discharge valve 213; the discharge valve 213 is used to discharge the second wax cake into a wax cake room or into a recovered oil tank 220; the recovered oil tank 220 has a second agitator 221 for beating the diluted second wax cake into a filter aid tank for recycling filter aid. It can be understood that the second wax cake is diluted and then enters the recovered oil tank 220, and is uniformly mixed by the second agitator 221, and then is beaten into the filter aid tank for recycling of the filter aid, so as to maximize the use of resources and reduce waste.

[0046] Further, referring to Figure 4 , the drying device 320 comprises a drying tank 321 and a second oil pump 322, and the second oil pump 322 is used to pump the second oil in the temporary storage tank 310 into the drying tank 321 for drying. It can be understood that, through the drying treatment of the drying tank 321, the water content and volatile impurities in the oil are further removed, the purity and quality of the oil are improved, and the treated oil can be directly delivered to the crystallization tank for crystallization.

[0047] Further, the drying tank 321 is a vacuum drying tank 321. Vacuum drying can be carried out at a lower temperature, effectively accelerating the evaporation of water and volatile impurities, shortening the drying time, and more efficiently removing water and volatile impurities in the oil. Moreover, using the vacuum drying tank 321 for oil drying can improve the quality of the oil and prolong the shelf life of the product.

[0048] A dewaxing device is provided by setting the above wax cake oil recovery device. The oil in the wax cake can be recycled and utilized, reducing the loss of oil in the waste wax cake and reducing the burden of waste treatment, which plays a positive role in environmental protection. The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the embodiments described above. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A wax cake oil recovery apparatus characterized by, The wax cake oil recovery device comprises: a circulating oil system for remelting and mixing the first wax cake to obtain an oil wax liquid; a filtering system comprising a filter, the filter being used for filtering the oil wax liquid to obtain a second wax cake and a first oil, and returning the first oil separated by filtering to the circulating oil system; the filter has a steam inlet and a compressed air inlet, a compressed air source and a steam source being respectively connected to the steam inlet and the compressed air inlet, the compressed air source and the steam source being used for extruding the second wax cake to obtain a second oil when the second wax cake reaches a predetermined thickness; a recovered oil drying system comprising a temporary storage tank and a drying device, the temporary storage tank being used for storing the second oil, and the drying device being used for drying the second oil and returning the dried oil to the circulating oil system.

2. The wax cake oil recovery device according to claim 1, wherein: the circulating oil system comprises a hopper auger, a circulating oil tank and a first oil pump; the hopper auger is used for crushing the first wax cake and conveying the first wax cake into the circulating oil tank, and the first oil pump is used for outputting the oil wax liquid in the circulating oil tank to the filtering system for filtering.

3. The wax cake oil recovery device according to claim 2, wherein: the circulating oil tank comprises a steam heating coil, a first agitator and a feeding port, the steam heating coil being matched with the agitator and being used for heating the first wax cake in the circulating oil tank.

4. The wax cake oil recovery device according to claim 1, wherein: the filtering system further comprises a discharge valve; the discharge valve is used for discharging the second wax cake into a wax cake room or into a recovered oil tank; the recovered oil tank has a second agitator, which is used for punching the diluted second wax cake into a filter aid tank, and the filter aid tank is used for recovering filter aid.

5. The wax cake oil recovery device according to claim 1, wherein: the drying device comprises a drying tank and a second oil pump, and the second oil pump is used for pumping the second oil in the temporary storage tank into the drying tank for drying.

6. The wax cake oil recovery apparatus of claim 5, wherein, The drying tank is a vacuum drying tank.

7. The wax cake oil recovery device according to claim 1, wherein: the filter is a vertical blade filter.

8. A dewaxing apparatus characterized by, The wax cake oil recovery device comprises the wax cake oil recovery device according to any one of claims 1-7.

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