Waste oil product regeneration treatment system

Abstract

The utility model provides a waste oil product regeneration treatment system which comprises a hydrocracking assembly used for receiving waste oil products and hydrocracking the waste oil products; the first atmospheric and vacuum fractionation device is communicated with the hydrocracking assembly and is used for atmospheric and vacuum fractionation operation; the storage assembly is communicated with the first atmospheric and vacuum fractionation device; the oil mixing device is communicated with the first atmospheric and vacuum fractionation device; the hydrofining assembly is communicated with the oil mixing device; and the second atmospheric and vacuum fractionation device is communicated with the hydrofining assembly and the storage assembly. By adopting the waste oil product regeneration treatment system provided by the utility model, phosphorus compounds, chlorine compounds, metal additives, colloid, asphaltene and other impurities in waste oil products can be effectively removed, the regeneration rate of the waste oil products can reach more than 99%, and the problems that the regeneration rate of the waste oil products in the prior art is reduced; meanwhile, secondary pollutants such as waste gas, waste liquid or waste residues are also generated.

Description

Technical Field

[0001] This utility model belongs to the field of waste oil treatment technology, specifically relating to a waste oil recycling system. Background Technology

[0002] With the rapid development of my country's national economy, oil products have become an indispensable consumable in industrial production, daily life, and travel, playing a vital role in the national economy and people's livelihood. Waste oil refers to oil products that have been contaminated or deteriorated during use or production, rendering them unsuitable for their original purpose for various reasons. Waste oil includes, but is not limited to, industrial oils such as lubricating oil, hydraulic oil, transmission oil, fuel oil, engine oil, and coal tar, as well as gutter oil and contaminated biological oils.

[0003] Waste oil typically contains high levels of heavy metals and harmful substances, posing a serious pollution hazard. Improper handling can pollute soil, water systems, and the atmosphere, causing severe harm to human health. However, waste oil also contains a significant amount of grease; therefore, recycling it can generate substantial economic benefits. Consequently, waste oil recycling remains a crucial task in the industry.

[0004] Existing waste oil treatment methods generally include vacuum distillation, scraped film distillation (heat treatment-vacuum distillation), molecular distillation, and solvent refining, which can achieve the recycling of waste oil to a certain extent. However, due to the inability to effectively remove high levels of impurities such as phosphorus compounds, chlorine compounds, metal additives, gums, and asphaltenes from waste oil, the regeneration rate of waste oil is reduced, and secondary pollutants such as waste gas, waste liquid, or waste residue are also generated. Utility Model Content

[0005] To address the technical problem that existing waste oil treatment processes cannot effectively remove high levels of impurities such as phosphorus compounds, chlorine compounds, metal additives, gums, and asphalt from waste oil, resulting in reduced waste oil regeneration rates and the generation of secondary pollutants such as waste gas, waste liquid, or waste residue, this invention provides a waste oil regeneration treatment system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A waste oil recycling system includes:

[0008] A hydrocracking unit is used to receive waste oil and hydrocrackle it.

[0009] A first atmospheric and vacuum distillation unit, which is connected to the hydrocracking unit, is used for atmospheric and vacuum distillation operations.

[0010] a storage assembly, the storage assembly being in communication with the first atmospheric-vacuum distillation unit;

[0011] an oil mixing device, the oil mixing device being in communication with the first atmospheric-vacuum distillation unit;

[0012] a hydrofining assembly, the hydrofining assembly being in communication with the oil mixing device;

[0013] a second atmospheric-vacuum distillation unit, the second atmospheric-vacuum distillation unit being in communication with the hydrofining assembly and the storage assembly.

[0014] Optionally, the hydrocracking assembly comprises:

[0015] a preheating device, the preheating device receiving the waste oil product and preheating the waste oil product;

[0016] a dewatering and desalting device, the dewatering and desalting device being in communication with the preheating device;

[0017] a stirring mixer, the stirring mixer being in communication with the dewatering and desalting device;

[0018] a first catalyst feeding device, the first catalyst feeding device being in communication with the stirring mixer;

[0019] a loop reactor, the loop reactor being in communication with the stirring mixer and the first atmospheric-vacuum distillation unit;

[0020] a hydrogenation device, the hydrogenation device being in communication with the loop reactor and the hydrofining assembly.

[0021] Optionally, the hydrogenation device comprises a fresh hydrogen compressor and a recycle hydrogen compressor, the fresh hydrogen compressor and the recycle hydrogen compressor being in communication with the loop reactor;

[0022] the fresh hydrogen compressor providing fresh hydrogen gas to the loop reactor, and the recycle hydrogen compressor providing recycle hydrogen gas to the loop reactor.

[0023] Optionally, a first hydrogen regulator is provided on the loop reactor, the fresh hydrogen compressor and the recycle hydrogen compressor being in communication with the loop reactor through the first hydrogen regulator.

[0024] Optionally, the hydrofining assembly comprises a hydrofining reactor and a second catalyst feeding device;

[0025] the hydrofining reactor being in communication with the oil mixing device, the second atmospheric-vacuum distillation unit and the recycle hydrogen compressor;

[0026] the second catalyst feeding device being in communication with the hydrofining reactor.

[0027] Optionally, the hydrofining reactor is provided with a second hydrogen regulator, which is communicated with the hydrofining reactor and the recycle hydrogen compressor.

[0028] Optionally, the waste oil product regeneration treatment system further comprises a high-low pressure separator, which is connected between the loop reactor and the first atmospheric-vacuum distillation device, and is communicated with the recycle hydrogen compressor.

[0029] Optionally, the storage assembly comprises a liquefied gas storage, a tail residue storage and a liquid phase oil product storage, and the liquefied gas storage, the tail residue storage and the liquid phase oil product storage are respectively communicated with the first atmospheric-vacuum distillation device and the second atmospheric-vacuum distillation device.

[0030] The waste oil product regeneration treatment system has the advantages that:

[0031] The waste oil product regeneration treatment system provided by the utility model can effectively remove phosphorus compounds, chlorine compounds, metal additives, gum, asphaltene and other impurities in waste oil products, and the regeneration rate of waste oil products can reach more than 99%, which solves the technical problem of low regeneration rate of waste oil products in the prior art, and simultaneously generates secondary pollutants such as waste gas, waste liquid or waste residue. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic view of the waste oil product regeneration treatment system in the utility model;

[0033] Figure 2 is a further schematic view of the waste oil product regeneration treatment system in the utility model;

[0034] Figure 3 is a schematic view of the hydrogenation device in the waste oil product regeneration treatment system in the utility model.

[0035] Wherein: 1, hydrocracking assembly; 11, preheating device; 12, dehydration and desalination device; 13, stirring mixer; 14, first catalyst feeding device; 15, loop reactor; 151, first hydrogen regulator; 16, hydrogenation device; 161, new hydrogen compressor; 162, circulating hydrogen compressor; 2, first atmospheric and vacuum distillation device; 3, storage assembly; 4, oil mixing device; 5, hydrofining assembly; 51, hydrofining reactor; 52, second catalyst feeding device; 53, second hydrogen regulator; 6, second atmospheric and vacuum distillation device; 7, high-low pressure separator. DETAILED DESCRIPTION

[0036] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.

[0038] Unless specifically stated otherwise, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not limiting. It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale, and that, for ease of illustration and description, not all of the parts are shown to scale. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as if discussed in detail herein. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative, and not as a limitation. Thus, other example embodiments of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0039] For purposes of the description hereinafter, spatial or directional terms, such as "above", "below", "top", "bottom", "upper", "lower", and the like, can be used where reference is made to one structure or feature in relation to other structures or features. It is to be understood that such spatial and directional terms are in fact intended to encompass different orientations of the device or feature in use or operation in addition to the orientation depicted in the figures. For example, if the device or feature is inverted, then an "above" or "upper" feature would become a "below" or "lower" feature relative to the other feature or structure. Thus, the example term "above" can encompass both an "above" and "below" orientation. The structures can also be oriented in other ways (turned 90 degrees or at other orientations) and the included spatial or directional descriptions still apply.

[0040] In addition, it needs to be explained that the use of "first", "second" and the like words to limit parts, only for the convenience of distinguishing the corresponding parts, if there is no other declaration, the above words have no special meaning, therefore cannot be understood as the limitation of the protection scope of the utility model.

[0041] It needs to be explained that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0042] Waste oil products include but are not limited to industrial oils such as lubricating oil, hydraulic oil, transmission oil, fuel oil, engine oil, coal tar oil and the like, as well as swill, contaminated biological oil and the like, which have the dual characteristics of pollution and resource, while petroleum, as a non-renewable fossil energy, is the pillar of national economic development, and is directly related to the energy security and sustainable development of the country, and if a large amount of waste oil products can be regenerated and utilized, it will have a positive impact on the national energy strategy.

[0043] Referring to Figure 1 , a schematic diagram of a waste oil product regeneration treatment system described in the application is shown, which comprises: a hydrocracking assembly 1 for receiving waste oil products and performing hydrocracking on the waste oil products; a first atmospheric and vacuum distillation device 2, which is communicated with the hydrocracking assembly 1 and is used for atmospheric and vacuum distillation operation; a storage assembly 3, which is communicated with the first atmospheric and vacuum distillation device 2; an oil mixing device 4, which is communicated with the first atmospheric and vacuum distillation device 2; a hydrofining assembly 5, which is communicated with the oil mixing device 4; and a second atmospheric and vacuum distillation device 6, which is communicated with the hydrofining assembly 5 and the storage assembly 3.

[0044] In the embodiment, most of the metals, residual carbon and solid particles contained in the waste oil are eliminated by hydrocracking, and then liquid phase fractions of different distillation ranges, gas phase products and vacuum tail residues are obtained by atmospheric and vacuum distillation; after the liquid phase fractions are mixed, hydrofining is carried out, and the hydrofining products are subjected to atmospheric and vacuum distillation again to obtain gas phase products, liquid phase products and vacuum tail residues of different distillation ranges, wherein the liquid phase products are oil product. The waste oil regeneration treatment system provided in the utility model can effectively remove impurities such as phosphorus compounds, chlorine compounds, metal additives, gum and asphaltene in the waste oil, and the waste oil regeneration rate can reach more than 99%, thereby solving the problem of reduced regeneration rate of waste oil in the prior art, and also solving the technical problem of secondary pollutants such as waste gas, waste liquid or waste residue.

[0045] Optionally, with reference to Figure 2 The hydrocracking assembly 1 in the utility model comprises a preheating device 11, the preheating device 11 receives waste oil and preheats the waste oil; a dewatering and desalting device 12, the dewatering and desalting device 12 is communicated with the preheating device 11; a stirring mixer 13, the stirring mixer 13 is communicated with the dewatering and desalting device 12; a first catalyst feeding device 14, the first catalyst feeding device 14 is communicated with the stirring mixer 13; a loop reactor 15, the loop reactor 15 is communicated with the stirring mixer 13 and a first atmospheric and vacuum distillation device 2; and a hydrogenation device 16, the hydrogenation device 16 is communicated with the loop reactor 15 and a hydrofining assembly 5.

[0046] Optionally, with reference to Figure 3 The hydrogenation device 16 in the utility model comprises a fresh hydrogen compressor 161 and a circulating hydrogen compressor 162, and the fresh hydrogen compressor 161 and the circulating hydrogen compressor 162 are both communicated with the loop reactor 15; the fresh hydrogen compressor 161 provides fresh hydrogen into the loop reactor 15, and the circulating hydrogen compressor 162 provides circulating hydrogen into the loop reactor 15.

[0047] Optionally, the loop reactor 15 in the utility model is provided with a first hydrogen regulator 151, and the fresh hydrogen compressor 161 and the circulating hydrogen compressor 162 are communicated with the loop reactor 15 through the first hydrogen regulator 151; in use, the ratio of fresh hydrogen to circulating hydrogen in the loop reactor 15 is adjusted to 1:2 to 1:10 and the hydrogen to oil ratio is adjusted to 400:1 to 2000:1 through the first hydrogen regulator 151.

[0048] Optionally, the hydrofining assembly 5 in the utility model comprises a hydrofining reactor 51 and a second catalyst feeding device 52; the hydrofining reactor 51 is communicated with the oil mixing device 4, a second atmospheric and vacuum distillation device 6 and the circulating hydrogen compressor 162; and the second catalyst feeding device 52 is communicated with the hydrofining reactor 51.

[0049] Optionally, with reference to Figure 3 The hydrogen oil ratio in the hydrogen refining reactor 51 is 700:1 to 2500:1.

[0050] Optionally, the waste oil product regeneration treatment system further comprises a high-low pressure separator 7, which is connected between the loop reactor 15 and the first constant vacuum fractionation device 2.

[0051] Optionally, the first catalyst feeding device 14 stores liquid catalyst; and the second catalyst feeding device 52 stores solid metal-based catalyst.

[0052] Optionally, the storage assembly 3 comprises a liquefied gas storage, a tail residue storage and a liquid oil product storage.

[0053] Further, in the present embodiment, the received waste oil is heated by the preheating device 11 to 80-160°C, and after desalting and dewatering, the preheated and dewatered and desalted waste oil is fed into the stirring mixer 13 by a high-pressure feed pump; the first catalyst feeding device 14 adds liquid catalyst into the stirring mixer 13, and the liquid catalyst and the dewatered and desalted waste oil are fully mixed by the stirring mixer 13; the product fully mixed with the liquid catalyst is introduced into the loop reactor 15, mixed with the mixed hydrogen from the new hydrogen compressor 161 and the recycle hydrogen compressor 162 at a hydrogen to oil ratio of 400:1-2000:1, and hydrogen cracking is carried out in the loop reactor 15 to remove metals, carbon residue and solid particles in the raw material, and the reaction product is subjected to atmospheric and vacuum distillation to obtain liquefied gas, atmospheric distillate at an initial boiling point to 180°C, atmospheric distillate at 180-360°C, vacuum distillate at 360-450°C, and vacuum residue greater than 450°C; the liquefied gas and the vacuum residue are stored by the storage assembly; the atmospheric distillate and the vacuum distillate are subjected to oil mixing operation by the oil mixing device 4 to obtain mixed distillate; the mixed distillate is fed into the hydrogenation refining reactor 51 by a high-pressure feed pump, heat exchanged to 100-160°C, mixed with hydrogen from the recycle hydrogen compressor at a hydrogen to oil ratio of 700:1-2500:1, combined with the solid metal-based catalyst added by the second catalyst feeding device 52, and subjected to hydrogenation refining; the hydrogenation refined reaction product is again subjected to atmospheric and vacuum distillation to obtain liquefied gas, naphtha at an initial boiling point to 180°C, diesel at 180-360°C, lubricating oil base at 360-450°C, and vacuum residue greater than 450°C; the liquefied gas and the vacuum residue are fed into the storage device for storage, and the obtained oil product is stored and processed respectively.

[0054] Specifically, in the loop reactor 15, the mixed hydrogen has a temperature of 25-60°C and a pressure of 0.5-9 MPa, the new hydrogen has a purity of >99%, the recycle hydrogen has a purity of >80%, the ratio of new hydrogen to recycle hydrogen is 1:2-1:10, and the hydrogen cracking is carried out at a reaction temperature of 200-500°C and a reaction pressure of 2-10 MPa.

[0055] Specifically, in the hydrogenation refining reactor 51, the hydrogen has a temperature of 30-60°C and a pressure of 1-10 MPa, the recycle hydrogen has a purity of >80%, and the hydrogenation refining is carried out at a reaction temperature of 300-600°C and a reaction pressure of 2-12 MPa.

[0056] For example, after detecting the product, the result shows that after the mineral waste oil product is treated by the waste oil product regeneration treatment system, the naphtha yield is 4.3%, the diesel oil yield is 22.56%, the lubricating oil base oil yield is 53.25%, the vacuum tailings yield is 15.53%, the liquefied gas yield is 3.76%, and the comprehensive waste oil product yield is 99.4%, so the waste oil product regeneration treatment system can greatly improve the treatment and recovery rate of the waste oil product.

[0057] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A system for the regeneration treatment of waste oil products, characterized in that The waste oil product regeneration treatment system comprises: a hydrocracking assembly (1) for receiving waste oil products and performing hydrocracking on the waste oil products; a first atmospheric-vacuum distillation device (2) in communication with the hydrocracking assembly (1) for atmospheric-vacuum distillation operation; a storage assembly (3) in communication with the first atmospheric-vacuum distillation device (2); an oil mixing device (4) in communication with the first atmospheric-vacuum distillation device (2); a hydrofining assembly (5) in communication with the oil mixing device (4); a second atmospheric-vacuum distillation device (6) in communication with the hydrofining assembly (5) and the storage assembly (3).

2. The waste oil regeneration treatment system according to claim 1, characterized by The hydrocracking assembly (1) comprises: a preheating device (11) for receiving waste oil products and preheating the waste oil products; a dewatering and desalting device (12) in communication with the preheating device (11); a stirring mixer (13) in communication with the dewatering and desalting device (12); a first catalyst feeding device (14) in communication with the stirring mixer (13); a loop reactor (15) in communication with the stirring mixer (13) and the first atmospheric-vacuum distillation device (2); a hydrogenation device (16) in communication with the loop reactor (15) and the hydrofining assembly (5).

3. The waste oil regeneration treatment system according to claim 2, characterized by The hydrogenation device (16) comprises a fresh hydrogen compressor (161) and a recycle hydrogen compressor (162), both in communication with the loop reactor (15); The fresh hydrogen compressor (161) provides fresh hydrogen to the loop reactor (15), and the recycle hydrogen compressor (162) provides recycle hydrogen to the loop reactor (15).

4. The waste oil regeneration treatment system according to claim 3, wherein A first hydrogen regulator (151) is arranged on the loop reactor (15), and the fresh hydrogen compressor (161) and the recycle hydrogen compressor (162) are in communication with the loop reactor (15) through the first hydrogen regulator (151).

5. The waste oil regeneration treatment system according to claim 3, wherein The hydrofining assembly (5) comprises a hydrofining reactor (51) and a second catalyst feeding device (52); The hydrofining reactor (51) is in communication with the oil mixing device (4), the second atmospheric-vacuum distillation device (6), and the recycle hydrogen compressor (162); The second catalyst feeding device (52) is in communication with the hydrofining reactor (51).

6. The waste oil regeneration treatment system according to claim 5, wherein A second hydrogen regulator (53) is arranged on the hydrofining reactor (51), and the second hydrogen regulator (53) is in communication with the hydrofining reactor (51) and the recycle hydrogen compressor (162).

7. The waste oil regeneration treatment system according to claim 5, wherein The waste oil product regeneration treatment system further comprises a high-low pressure separator (7) connected between the loop reactor (15) and the first atmospheric-vacuum distillation device (2). The high-low pressure separator (7) is communicated with the circulating hydrogen compressor (162).

8. The waste oil product regeneration treatment system according to any one of claims 1 to 7, characterized by, The storage assembly (3) comprises a liquefied gas storage, a tail residue storage and a liquid phase oil product storage. The liquefied gas storage, the tail residue storage and the liquid phase oil product storage are respectively communicated with the first atmospheric-vacuum distillation device (2) and the second atmospheric-vacuum distillation device (6).

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