Base oil manufacturing method, base oil manufacturing apparatus, and base oil manufacturing and logistics complex system equipped with the same

Abstract

To provide a base oil production method, a base oil production apparatus, and a base oil production and logistics complex system with the same that can efficiently meet supply of various waste oils and recycled oils and demand for the various base oils.SOLUTION: A base oil production method comprises: a raw material oil storage step for distributing and storing at least one kind of raw material oils selected from waste oils and recycled oils in any one of a plurality of storage tanks based on properties of the raw material oils; and a base oil preparation step having at least one step selected from a step (1) for making a base oil without mixing the raw material oils distributed to the plurality of storage tanks with other raw material oils, and a step (2) for mixing at least two of the raw material oils distributed in the plurality of storage tanks to form the base oil. There are also provided a base oil production apparatus, and a base oil production and logistics complex system with the same.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for producing a base oil, a base oil production apparatus, and a base oil production and logistics integrated system including the same. [Background technology]

[0002] Traditionally, Japan has achieved growth through socio-economic activities based on mass production, mass consumption, and mass waste, but this has resulted in the disposal of vast amounts of waste, leading to a shortage of land for final disposal sites and growing concerns over the environmental impact of waste. Waste is a wide variety of items, ranging from paper products such as printing and communication paper, cardboard, and newspapers, to various building materials such as gypsum board and fiberboard, glass bottles, PET bottles, and clothing. With the aim of building a circular economic system, various waste- and recycling-related laws have been enacted, and waste recycling is being promoted.

[0003] Examples of waste include oils (also called "waste oil") such as lubricating oil, waste plastic oil, and cooking oil. Until now, most of these waste oils have been disposed of by burning. For example, Patent Document 1 discloses a method for treating waste oil discharged from ships, machinery, etc. by heating it to a temperature above its thermal decomposition point in an oxygen-free environment. Furthermore, as a method for effectively utilizing waste oil, Patent Document 2 proposes a waste oil treatment and recycling system in which purified oil, obtained by removing impurities from waste oil, is mixed with recycled oil to produce recycled fuel oil. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-261437 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-137360 Summary of the Invention [Problem to be solved by the invention]

[0005] There are many types of waste oil and recycled oils, such as recycled heavy oil made from recycled waste oil, and the desired properties when recycled and used as base oil are also diverse. The more uses for these waste oils and recycled oils, the more desirable they are, considering the need to reduce the environmental impact of waste. Potential uses for these waste oils and recycled oils include, for example, lubricating oil base oil, fertilizer base oil (for waste oil fertilizer, etc.), soap base oil (for recycled soap, etc.), paint base oil (for waste oil-based paint, etc.), and various base oils, such as fuel oil for direct-fire industrial furnaces, boiler fuel oil, and diesel fuel oil.

[0006] When using waste oil and recycled oil as recycled heavy oil, it is necessary to satisfy the properties of recycled heavy oil specified in JIS K2170:2013. The properties of the recycled heavy oil are specified as flash point, kinematic viscosity at 50°C, pour point, ash content, sulfur content, chlorine content, water content, and total calorific value. The flash point must be 70°C or higher, and the kinematic viscosity at 50°C must be 50mm or higher. 2 / s or less, a pour point of -10°C or less, and a gross calorific value of 41.8MJ / kg or more, it has properties similar to heavy oil A and heavy oil C. Therefore, fuel oils such as fuel oil for direct-fired industrial furnaces, boiler fuel oil, and diesel fuel oil, which are the supply destinations for heavy oil A and heavy oil C and are expected to be consumed in large quantities, are being considered as promising sources of recycled heavy oil.

[0007] Incidentally, marine fuel oil is one of the promising sources of recycled heavy oil. When recycled heavy oil is used as marine fuel oil, the following considerations can be made. The sulfur content of recycled heavy oil is regulated to be 0.6% by mass or less. With regard to marine fuel, preventing environmental pollution has become a globally important issue in recent years, and as part of its air pollution prevention measures, the International Maritime Organization (IMO) is strengthening regulations to reduce the sulfur content of fuel oil for all ships from 3.5% by mass to 0.5% by mass or less from 2020. Although the sulfur concentration of recycled heavy oil is slightly above the regulatory limit for marine fuel, recycled heavy oil is usually processed with a margin above the standard limit, and even if it does exceed the regulatory limit, it is expected that only minor desulfurization treatment will suffice. Also, considering that heavy oil A and heavy oil C have been used as marine fuel, recycled heavy oil is fully capable of being used as marine fuel.

[0008] On the other hand, the properties of recycled heavy oil include a water content of 1.0 mass% or less (recycled heavy oil type 1) or 5.0 mass% or less (recycled heavy oil type 2), and an ash content of 1.0 mass% or less, which is higher than heavy oil A and heavy oil C, so it is expected that processing such as removing water and ash may be necessary.

[0009] Although there are regulations regarding the properties of recycled heavy oil as mentioned above, the properties of waste oil and the recycled oil produced from it cannot be generalized because they vary greatly depending on where the waste oil is discharged and where it is recycled from. In order to recycle such waste oil and recycled oil, treatments that correspond to their different properties may be required.

[0010] The method disclosed in Patent Document 1 involves incineration, which makes it impossible to recycle waste and increases the environmental load. Furthermore, the waste oil treatment and recycling system disclosed in Patent Document 2 recycles waste oil by removing impurities through filtration to convert it into purified oil, which is then mixed with recycled oil, etc. However, it is not designed to accept multiple types of waste oil, and a single system cannot handle a variety of waste oils and recycled oils. Furthermore, simply removing impurities through filtration is not enough to produce base oils that meet the properties required for various applications. Therefore, it is extremely difficult for the technology disclosed in Patent Document 2 to efficiently handle a wide range of waste oils and recycled oils, not just recycled heavy oil, and recycle them for various applications. Therefore, conventional technology has not been able to fully address the demand for demand-based recycling, rather than simply recycling.

[0011] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a base oil manufacturing method, a base oil manufacturing apparatus, and a base oil manufacturing and logistics complex system equipped with the same, which can efficiently accommodate the supply of various waste oils and recycled oils and meet the demand for various base oils. [Means for solving the problem]

[0012] In order to solve the above problems, the present invention provides the following base oil production method, base oil production apparatus, and base oil production and logistics integrated system including the same. 1. A raw oil storage step of distributing and storing at least one raw oil selected from waste oil and recycled oil in any one of a plurality of storage tanks based on the properties of the raw oil; A base oil preparation step including at least one step selected from the following steps (1) and (2): Step (1) A step of converting the stock oil distributed to the plurality of storage tanks into base oil without mixing it with other stock oils. Step (2) mixing at least two of the stock oils distributed to the plurality of storage tanks to obtain a base oil. A method for producing a base oil having the formula: 2. A raw oil storage facility having a plurality of storage tanks for distributing and storing at least one raw oil selected from waste oil and recycled oil based on the properties of the raw oil; A base oil preparation facility having at least one facility selected from the following facilities (1) and (2): Equipment (1) Equipment for converting the stock oil distributed to the multiple storage tanks into base oil without mixing it with other stock oils Equipment (2) Equipment for mixing at least two of the raw oils distributed to the plurality of storage tanks to produce base oil. and a base oil manufacturing apparatus comprising: 3. A feedstock oil receiving facility for receiving at least one feedstock oil selected from waste oil and recycled oil; a raw oil storage facility having a plurality of storage tanks that distribute and store the raw oil based on the properties of the raw oil; A base oil preparation facility having at least one facility selected from the following facilities (1) and (2): Equipment (1) Equipment for converting the stock oil distributed to the multiple storage tanks into base oil without mixing it with other stock oils Equipment (2) Equipment for mixing at least two of the raw oils distributed to the plurality of storage tanks to produce base oil. A base oil producing apparatus comprising: a shipping facility for shipping the base oil supplied from the base oil preparation facility; A complex system for manufacturing and distributing base oil. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a base oil manufacturing method, a base oil manufacturing apparatus, and a base oil manufacturing and logistics complex system equipped with the same, which can efficiently accommodate the supply of various waste oils and recycled oils and meet the demand for various base oils. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a flow diagram illustrating a base oil production method, a base oil production apparatus, and a production and logistics integrated system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be described in detail below. The present invention is not limited to the following embodiments, and can be implemented by making any changes within the scope that does not impair the effects of the invention.

[0016] [Base oil manufacturing method] A method for producing a base oil according to an embodiment of the present invention (hereinafter, sometimes simply referred to as "the present embodiment") includes: A raw oil storage step of distributing and storing at least one raw oil selected from waste oil and recycled oil in any one of a plurality of storage tanks based on the properties of the raw oil; A base oil preparation step including at least one step selected from the following steps (1) and (2): Step (1) A step of converting the stock oil distributed to the plurality of storage tanks into base oil without mixing it with other stock oils. Step (2) mixing at least two of the stock oils distributed to the plurality of storage tanks to obtain a base oil. It has the following characteristics.

[0017] By distributing and storing waste oil and recycled oil (hereinafter collectively referred to as "feed oil") based on their properties, it is possible to efficiently accommodate the supply of various feed oils. Furthermore, by mixing and preparing the distributed and stored feed oils as needed, it is possible to meet the demand for various base oils. And because the feed oils are distributed and stored based on their properties, it is easy to adjust the properties of the base oil to the desired state. Thus, the base oil manufacturing method of this embodiment can efficiently accommodate the supply of various waste oils and recycled oils, and can meet the demand for various base oils. The method for producing a base oil according to this embodiment will be described in detail below, starting with the feedstock oil storage step, with reference to the flow chart of FIG.

[0018] [Feedstock oil storage process] The feedstock oil storage step is a step of allocating and storing at least one feedstock oil selected from waste oil and recycled oil in any one of a plurality of storage tanks based on the properties of the feedstock oil.

[0019] (raw oil) As mentioned above, various types of waste oil and recycled oil can be accepted without any restrictions as raw material oil. Representative examples of waste oil include cooking oil discharged from homes, restaurants, food processing factories, etc.; used lubricating oils such as lubricating oil for used transmissions, lubricating oil for internal combustion engines (various engines and turbines), lubricating oil for external combustion engines (various boilers), lubricating oil for metal processing (including metal cutting oil, press oil, quenching oil, etc.), and various other industrial lubricating oils; insulating oils used for insulating and cooling electrical equipment such as transformers, circuit breakers, and capacitors; cleaning oils used for cleaning and degreasing metal materials; and waste plastic oil obtained by turning exhaust plastic into oil.

[0020] Examples of recycled oil include waste oils that have been subjected to purification processes such as filtration, desalting, dehydration, desulfurization, ash reduction, sludge reduction, and fractional distillation. Typical examples include recycled heavy oils specified in JIS K2170:2013, which are waste oils that have been subjected to these purification processes as needed, and bio-recycled heavy oils (JIS K2171:2013). The recycled oils that can be used in the manufacturing method of this embodiment are not limited to these recycled heavy oils, and are not particularly limited as long as they are waste oils that have been treated in some way.

[0021] (Characteristics of feedstock oil) The properties of the feedstock oil may be any properties required for the desired base oil, and therefore the method for producing a base oil according to this embodiment can meet the demand for a variety of base oils. Typical properties of the feedstock include flash point, kinematic viscosity at 50°C, pour point, ash content, sulfur content, chlorine content, moisture content, gross calorific value, and further properties such as density at 15°C, CCAI (Calculated Carbon Aromaticity Index), cloud point, residual carbon content, saturated content, olefin content, aromatic content, resin content, and asphaltene content. In the production method of this embodiment, at least one of these properties is adopted as the property of the feedstock, and the feedstock is distributed and stored according to that property.

[0022] The properties of the feedstock can be, for example, the properties required for the desired base oil, because this makes it easier to prepare the desired base oil. For example, if the desired base oil is a lubricating base oil, the distribution may be based on at least one property generally required for lubricating base oils, such as flash point, kinematic viscosity at 50°C, pour point, etc. Alternatively, if the desired base oil is a marine fuel, the distribution may be based on at least one property generally required for marine fuels, such as sulfur content, gross calorific value, and CCAI (Calculated Carbon Aromaticity Index), etc.

[0023] (distribute and store) In the production method of this embodiment, the feedstock oil is distributed and stored in one of a plurality of storage tanks based on the properties of the feedstock oil. By distributing and storing the feedstock oil based on its properties, the properties of the feedstock oil in the storage tanks can be easily grasped, and it can be easily determined which storage tank the feedstock oil in should be used in accordance with the properties required for the desired base oil.

[0024] There are no particular restrictions on the distribution and storage methods as long as they are based on the properties of the feedstock oil. For example, when the desired base oil is a marine fuel, the legally or generally required properties for marine fuel include sulfur content, gross calorific value, CCAI (Calculated Carbon Aromaticity Index), etc., as described above, and it is preferable to have at least one property selected from sulfur content and gross calorific value. In this case, the property of the feedstock is particularly the legally specified sulfur content, and the sulfur content of the feedstock is classified, for example, as (a1) 0.3 mass% or less, (b1) more than 0.3 mass% and 0.5 mass% or less, (c1) more than 0.5 mass% and 0.8 mass% or less, and (d1) more than 0.8 mass%, and the feedstock that falls under the above classification conditions can be distributed and stored in storage tanks A to D corresponding to the above classification conditions (a1) to (d1), respectively.

[0025] Furthermore, when the desired base oil is a marine fuel, the feedstock can be distributed and stored based on two properties, such as sulfur content and gross calorific value. In this case, the sulfur content of the feedstock is classified according to the classification conditions (a1) to (d1) above, and the gross calorific value is classified, for example, as follows: (a2) 42.0 (MJ / kg) or more, (b2) 41.8 (MJ / kg) or more but less than 42.0 (MJ / kg), (c2) 41.5 (MJ / kg) or more but less than 41.8 (MJ / kg), and (d2) less than 41.5 (MJ / kg). A storage tank is provided for each classification condition of the most important property of the feedstock (here, sulfur content), and the gross calorific value is classified by combining at least two classification conditions for each classification condition. This reduces the number of storage tanks and facilitates appropriate classification, which is efficient.

[0026] Regarding the above classification, it is sufficient to set at least two classification conditions for the properties of one feedstock oil. Considering efficient distribution and storage, ease of adjustment to the required properties of the base oil, etc., the number of classification conditions is preferably three or more, with the upper limit being preferably six or less, more preferably five or less, and particularly preferably four.

[0027] With regard to the above classification conditions (a1) to (d1), the legal limit for sulfur content is 0.5 mass% or less as mentioned above, and since classification condition (b1) specifies 0.5 mass% or less, it can be seen that feedstocks that fall under classification conditions (a1) and (b1) are feedstocks that satisfy the legal limit, while feedstocks that fall under classification conditions (c1) and (d1) do not satisfy the legal limit. In this way, by using the legally regulated values ​​as one of the classification conditions, it becomes easier to determine whether the feedstock satisfies the legally regulated values. Note that when classifying by properties for which no legally regulated values ​​have been set, it is advisable to classify by, for example, the required values ​​of the properties required for the desired base oil.

[0028] When there are two classification conditions, it is preferable to have one classification condition that is above the legally regulated or required threshold (here, "above" means superior), and one classification condition that is below the threshold (here, "below" means inferior). Furthermore, when an even number of classification conditions (four or more) are set, it is preferable that the number of classification conditions above the threshold be between half the number of classification conditions ±1. For example, in the case of the above classification conditions (a1) to (d1), half of the four classification conditions, or two, are classification conditions above the threshold. Setting them in this manner increases the variation in the blending of stock oils that fall above and below the threshold, making it easier to adjust the desired base oil to the required properties. Furthermore, if there are three classification conditions, it is preferable that one or two of them are above the threshold of the legally regulated value or required value, and if there are an odd number of classification conditions (five or more), the number of classification conditions above the threshold should be between the number of classification conditions ±1 / 2 (for example, if there are five classification conditions, the number will be two to four).

[0029] More specifically, when the sulfur content classification conditions (a1) to (d1) and the gross calorific value classification conditions (a2) to (d2) are adopted as the properties of the feedstock, for example, storage tank A for storing feedstock A satisfying classification conditions (a1) and (a2) or (b2), storage tank B for storing feedstock B satisfying classification conditions (b1) and (a2) or (b2), storage tank C for storing feedstock C satisfying classification conditions (c1) and (b2) or (c2), and storage tank D for storing feedstock D satisfying classification conditions (d1) and (c2) or (d2) can be provided, thereby reducing the number of storage tanks and appropriately distributing the feedstock. Here, storage tank A may be configured to store feedstocks that fall under three classification conditions for gross calorific value, such as feedstocks that satisfy classification conditions (a1) and (a2) to (c2). In addition, in the above example, the number of classification conditions for the sulfur concentration and the total calorific value is four, but for example, the number of classification conditions for the sulfur concentration may be four and the number of classification conditions for the total calorific value may be three, and these classification conditions may be combined.

[0030] The number of storage tanks to be installed may be the same as the number of classification conditions, and for example, if the amount of the above-mentioned feedstock B is large, an additional storage tank may be installed to store the feedstock B. Also, if a feedstock that does not fall under the above-mentioned classification conditions is to be received, it is possible to add an additional storage tank accordingly.

[0031] If the property information is known at the time of receipt, the property of the feedstock oil can be the property of that information, but if the property information is unknown at the time of receipt, the feedstock oil can be temporarily received in a receiving tank and analyzed.The feedstock oil can then be distributed and stored in appropriate storage tanks based on the analyzed property of the feedstock oil.

[0032] (multiple storage tanks) In the production method of this embodiment, multiple storage tanks are used (four storage tanks A to D are shown in FIG. 1). By using multiple storage tanks, various waste oils and recycled oils as feedstock oils can not only be received but also be divided into feedstock oils having similar properties based on their properties. Therefore, by mixing and preparing the feedstock oils as needed, it is possible to easily meet the demand for various base oils.

[0033] The storage tank is not particularly limited as long as it is a tank for stock oil, and a general-purpose product can be used. However, considering that the stock oil is distributed and the stored stock oil is used to prepare base oil, it is preferable that the tank is equipped with at least a receiving nozzle and a discharging nozzle. Furthermore, if necessary, a tank equipped with a level gauge, a heater for preventing solidification, a heat insulator, etc. may be used. The number, size, etc. of storage tanks may be determined depending on the amount of stock oil to be received, the number of classification conditions according to the properties of the stock oil, etc.

[0034] In addition, depending on the type (properties) of the feedstock oil, there may be cases where the received feedstock oil cannot be classified into any of the existing storage tanks that have been set up according to the properties of the feedstock oil. In such cases, storage tanks may be added as needed, or the properties of the received feedstock oil may be changed and the existing storage tanks may be used.

[0035] (Processing process) The manufacturing method of this embodiment may further include a treatment step of treating waste oil to produce recycled oil. Fig. 1 shows the treatment step in which waste oil is treated and then distributed and stored in a storage tank as recycled oil.

[0036] In the manufacturing method of this embodiment, as described above, waste oil and the reclaimed oil obtained by processing it can be accepted. However, when accepting waste oil, for example, edible oil, solid matter such as meat, fish, and vegetable scraps, fried food residue, etc. may remain. If the feedstock oil is distributed and stored in a storage tank with such solid matter remaining, it may accumulate in the piping and tank, causing blockage of the piping and deterioration of the quality of the feedstock oil. Furthermore, for example, used lubricating oil may contain solid matter such as metal fragments, which may cause the same problems as those described above with edible oil. Therefore, when accepting waste oil as the feedstock oil, it is preferable to include a processing step.

[0037] As mentioned above, solid matter often remains in the waste oil during the treatment process, so it is preferable to at least perform a filtration process. The waste oil may also be subjected to a refining process, as described below. The waste oil that has undergone the treatment process is treated as recycled oil, as shown in Figure 1.

[0038] (Refining process) In the production method of this embodiment, the feedstock oil may be refined. As shown in Fig. 1, the refinement of the feedstock oil may be carried out before storing it in a storage tank, or may be carried out after storage, i.e., on the feedstock oil stored in the storage tank. Also, as shown in Fig. 1, if the feedstock oil is waste oil, it may be refined after undergoing the treatment steps described above.

[0039] The refining process may be carried out appropriately depending on the properties of the feedstock oil and the properties required for the desired base oil, and representative examples include filtration, desalting, dehydration, desulfurization, ash reduction, sludge reduction, fractional distillation, etc. These various processes may be carried out according to conventional methods. In this embodiment, these processes may be performed individually or in combination.

[0040] As mentioned above, when recycled heavy oil is typically received as feedstock oil and the base oil is used as marine fuel, the JIS-standard recycled heavy oil has a water content of 1.0% by mass or less (recycled heavy oil type 1) or 5.0% by mass or less (recycled heavy oil type 2), and an ash content of 1.0% by mass or less, which may be higher than the A and C heavy oils currently commonly used as marine fuel. Therefore, if the water and ash content of the received recycled heavy oil is higher than those of A and C heavy oils, it is preferable to perform dehydration treatment and low-ash treatment. However, it goes without saying that if the water and ash content of the received recycled heavy oil is equivalent to those of A and C heavy oils, there is no need to perform dehydration treatment and low-ash treatment.

[0041] The sulfur content of standard recycled heavy oil is regulated to be 0.6% by mass or less. If the sulfur content exceeds 0.5% by mass, the received recycled heavy oil may be subjected to desulfurization treatment to reduce the sulfur content to 0.5% by mass or less. Furthermore, if a feedstock oil with a low sulfur content is stored in another storage tank, the sulfur content of the base oil may be reduced to 0.5% by mass or less by mixing the low-sulfur feedstock oil with a high-sulfur feedstock oil. Therefore, in such cases, desulfurization is not necessarily required, and the need for desulfurization can be determined by observing the status of the other feedstock oils stored in the storage tank. Thus, the base oil production method of this embodiment is industrially advantageous because it does not require refining all of the feedstock oils.

[0042] Furthermore, metalworking lubricants (including metal cutting oils, press oils, quenching oils, etc.) generally contain chlorine-based extreme pressure agents such as chlorinated paraffin as additives to improve workability, and therefore used metalworking lubricants are known to contain chlorine. Therefore, if used as fuel, improper combustion can result in the generation of dioxins and may also cause damage to furnaces due to the production of hydrochloric acid. Therefore, when using used metalworking lubricants as feedstock, if an analysis of their properties reveals a high chlorine content, it is advisable to carry out a desalination process, particularly a refining process.

[0043] Figure 1 shows a configuration in which only the raw material oil stored in some of the multiple storage tanks, storage tanks C and D, undergoes refining treatment, but the manufacturing method of this embodiment is not limited to this configuration, and the raw material oil stored in all storage tanks may also undergo refining treatment.

[0044] [Base oil preparation process] The method for producing a base oil according to this embodiment includes a base oil preparation step, which specifically includes at least one step selected from the following steps (1) and (2): Step (1) A step of converting the stock oil distributed to the plurality of storage tanks into base oil without mixing it with other stock oils. Step (2) mixing at least two of the stock oils distributed to the plurality of storage tanks to obtain a base oil.

[0045] Step (1) is a step of converting the stock oil distributed to the plurality of storage tanks into base oil without mixing with other stock oils. Step (1) is a step adopted when the stock oil distributed to the storage tanks is used as base oil as it is. Figure 1 shows that, for example, the stock oil discharged from storage tanks A and B can be supplied as base oil as it is.

[0046] Step (2) is a step of mixing at least two of the stock oils distributed to the plurality of storage tanks to obtain a base oil. Step (2) is a step adopted when the stock oils distributed to the storage tanks cannot be used as a base oil as they are. Figure 1 shows that, for example, stock oils discharged from storage tanks A, B, and C can be mixed. For example, assume that marine fuel is prepared as a base oil, and that stock oil A that satisfies the above classification conditions (a1) and (a2) or (b2) is stored in storage tank A as the stock oil, and that stock oil B that satisfies classification conditions (b1) and (a2) or (b2) is stored in storage tank B. Both of the feedstocks A and B stored in these storage tanks have sulfur concentrations of 0.5% by mass or less, and can be used alone as base oil. Therefore, base oil can be produced by the process employed when the feedstock distributed to the storage tanks in step (1) is used as base oil as is. Alternatively, base oil can be produced by mixing the feedstocks A and B stored in storage tanks A and B depending on the required amount. In this case, the base oil is supplied after being mixed as shown in Figure 1.

[0047] Also, for example, assume that marine fuel is prepared as a base oil, and that stock oil A that satisfies the above classification conditions (a1) and (a2) or (b2) is stored in storage tank A as a stock oil, and that stock oil C that satisfies classification conditions (c1) and (b2) or (c2) is stored in storage tank C. Of the feedstocks A and C stored in these storage tanks, feedstock A can be used alone because its sulfur concentration is 0.3% by mass or less, but feedstock C cannot be used alone because its sulfur concentration is over 0.5% by mass. When using feedstock C, it must be mixed with feedstock A. For example, if the sulfur content of feedstock A is 0.2% by mass and the sulfur content of feedstock C is 0.6% by mass, the sulfur content of the resulting base oil can be reduced to 0.5% by mass or less by mixing the feedstocks A and C so that the amount of feedstock A used is 25% or more of the total amount of feedstocks A and C. In this case, in the flow diagram of Figure 1, feedstock A stored in storage tank A and feedstock C stored in storage tank C are mixed to produce the base oil.

[0048] As described above, it is possible to determine which storage tanks to store the stock oils in and in what amounts, taking into consideration the properties of the stock oils stored in the storage tanks, the amount of stock oil, the properties required for the desired base oil, etc. Therefore, the base oil manufacturing method of this embodiment makes it easy to respond to the supply of various waste oils and recycled oils, and to meet the demand for various base oils.

[0049] (mixture) In step (2), at least two types of feedstock oils are mixed. The mixing of the feedstock oils may be carried out using, for example, a mixing tank equipped with an agitator blade. In the flow diagram of FIG. 1, it is assumed that the feedstock oils stored in storage tanks A to C are mixed in one mixing tank, but the number of mixing tanks is not limited to one. For example, in addition to a mixing tank that mixes the feedstock oils stored in storage tanks A to C, multiple mixing tanks may be provided, such as a mixing tank that mixes the feedstock oils stored in storage tanks A and D, and a mixing tank that mixes the feedstock oils stored in storage tanks B and D.

[0050] The mixing tank may be provided with a plurality of nozzles for piping for transferring the feed oil from each storage tank. It is not necessary to provide the same number of nozzles as the number of storage tanks, and it is possible to determine which storage tank the feed oil will be used in and then connect the piping from that storage tank to the mixing tank. The mixing tank may also be provided with a nozzle for piping to discharge the base oil from the storage tank.

[0051] The mixing tank may be equipped with a level gauge, a heater for preventing solidification, a heat insulating material, a nozzle for supplying the additives described below, and the like, as required. In order to control the flow rates of at least two types of feedstock oils, a flow meter and a control valve for adjusting the flow rate may be provided in the piping from the storage tank to the mixing tank.

[0052] (additive mixing) In the method for producing a base oil according to this embodiment, additives may be mixed in the base oil preparation step. The additives may be appropriately selected and used depending on the desired base oil, and examples thereof include various additives such as antioxidants, low-temperature flow improvers, lubricity improvers, cetane number improvers, combustion promoters, detergents, sludge dispersants, anti-fungal agents, viscosity index improvers, extreme pressure agents, friction reducers, oiliness agents, metal deactivators, and anti-foaming agents.

[0053] When the fuel oil is used as a marine fuel or the like, additives generally used in fuel oils such as marine fuel, for example, various additives such as antioxidants, low-temperature fluidity improvers, lubricity improvers, cetane number improvers, combustion promoters, detergents, sludge dispersants, and anti-fungal agents, among those mentioned above, or coumarin, etc., may be used as an additive from the viewpoint of the diesel fuel delivery tax. Furthermore, when the base oil is used as a lubricating oil, it is advisable to use additives generally used in various lubricating oils, such as antioxidants, lubricity improvers, detergents, sludge dispersants, viscosity index improvers, extreme pressure agents, friction reducers, oiliness agents, metal deactivators, and antifoaming agents, among others.

[0054] In the base oil production method of this embodiment, when an additive is used, the additive is supplied to the mixing tank and mixed with the stock oil to produce the base oil, as is common to the preparation steps (1) and (2). In the flow diagram of Figure 1, the stock oil stored in storage tanks A to C is designed to be mixable with the additive.

[0055] (base oil) The base oil obtained by the base oil production method of this embodiment can be used for any purpose, such as lubricating oil base oil, fertilizer base oil (for waste oil fertilizer, etc.), soap base oil (for recycled soap, etc.), paint base oil (for waste oil paint, etc.), fuel oil for direct-fire industrial furnaces (mainly used in fields (factories) such as aluminum recycling, lime production, steel, and papermaking), boiler fuel oil, diesel fuel oil, and marine fuel oil.

[0056] Considering the features of the base oil production method of this embodiment, such as the ability to accommodate the supply of various waste oils and recycled oils and to meet the demand for various base oils, in particular the ease with which the desired base oil can be adapted to the required properties, and the fact that large demand is expected, various fuel oils such as fuel oil for direct-fired industrial furnaces, boiler fuel oil, diesel fuel oil, and marine fuel oil, and in particular marine fuel oil, are preferred as base oils.

[0057] [Base oil manufacturing equipment] The base oil production apparatus of this embodiment includes: A raw oil storage facility having a plurality of storage tanks that distribute and store at least one raw oil selected from waste oil and recycled oil based on the properties of the raw oil; A base oil preparation facility having at least one facility selected from the following facilities (1) and (2): Equipment (1) Equipment for converting the stock oil distributed to the multiple storage tanks into base oil without mixing it with other stock oils Equipment (2) Equipment for mixing at least two of the raw oils distributed to the plurality of storage tanks to produce base oil. The idea is to have the following.

[0058] The base oil production apparatus of this embodiment makes it easy to carry out the base oil production method of this embodiment. Therefore, the base oil production apparatus of this embodiment can efficiently produce base oils that meet the supply of various waste oils and recycled oils and the demand for various base oils.

[0059] The details regarding the feedstock oil, distribution to and storage in storage tanks, and preparation of base oil in the feedstock oil storage facility and base oil preparation facility that constitute the base oil production apparatus of this embodiment are the same as those described in the base oil production method of this embodiment. The details regarding storage tanks and mixing tanks, and the possibility of having a receiving tank that is temporarily used when receiving feedstock oil, are also the same.

[0060] The feedstock oil storage facility mainly comprises a plurality of storage tanks for storing the feedstock oil, and piping for distributing the feedstock oil received from vehicles such as tank trucks and ships such as tankers to the plurality of storage tanks. As mentioned above, the facility may also have a receiving tank that is temporarily used when receiving the feedstock oil.

[0061] The feedstock oil storage facility may include a processing facility for processing the feedstock oil (mainly waste oil) to produce recycled oil. As the processing facility, a filtration facility for performing a filtration process as described above is preferably used.

[0062] Furthermore, it is preferable that the feedstock oil storage facility further includes refining equipment for refining the feedstock oil. Examples of the refining equipment include refining equipment that can perform various refining processes such as filtration, desalting, dehydration, desulfurization, ash reduction, sludge reduction, and fractional distillation. The refining equipment that performs the refining processes may be installed upstream of the storage tank as shown in Figure 1, or may be installed downstream of the storage tank and refining the feedstock oil stored in the storage tank.

[0063] When recycled heavy oil is typically received as feedstock oil and the base oil is used as marine fuel, it is preferable to perform dehydration treatment and low-ash content treatment as described above, so it is preferable to provide dehydration treatment equipment and low-ash content treatment equipment. Furthermore, when using lubricating oil used as raw material oil, particularly lubricating oil for metal processing (including metal cutting oil, press oil, quenching oil, etc.), it is preferable to carry out desalination treatment as described above, and therefore it is preferable to provide desalination treatment equipment.

[0064] For example, a pump may be provided to pump the feedstock oil temporarily received in the receiving tank to the storage tank, to pump the feedstock oil from the storage tank to the mixing tank, or to pump the feedstock oil from the storage tank as base oil, as needed.

[0065] A flow meter and a flow control valve for the flow meter may be provided on the line for the raw oil discharged from the storage tank, and various instruments such as a level meter may be provided on the storage tank, receiving tank, and mixing tank. Furthermore, the storage tank, receiving tank, mixing tank, and piping may be provided with a heater, a heat insulator, etc., for the purpose of preventing the raw oil from solidifying.

[0066] (Application) As described above, the base oil production apparatus of this embodiment can efficiently produce base oils that meet the supply of various waste oils and recycled oils and the demand for various base oils. Therefore, the base oil production apparatus of this embodiment can be adapted to produce base oils for any purpose, such as lubricating oil base oil, fertilizer base oil (for waste oil fertilizer, etc.), soap base oil (for recycled soap, etc.), paint base oil (for waste oil paint, etc.), fuel oil for direct-fire industrial furnaces (mainly used in fields (factories) such as aluminum recycling, lime production, steel, and papermaking), boiler fuel oil, diesel fuel oil, and various fuel oils such as marine fuel oil.

[0067] Considering the features of the base oil production apparatus of this embodiment, such as its ability to accommodate the supply of various waste oils and recycled oils and to meet the demand for various base oils, particularly its ease of adapting to the required properties of the desired base oil, and the fact that large demand is expected, it is preferable to use it as a production apparatus for various fuel oils such as fuel oil for direct-fire industrial furnaces, boiler fuel oil, diesel fuel oil, and marine fuel oil, especially marine fuel oil.

[0068] [Base oil manufacturing and logistics complex system] The composite system for manufacturing and distributing base oil of this embodiment is as follows: a feed oil receiving facility for receiving at least one feed oil selected from waste oil and recycled oil; a raw oil storage facility having a plurality of storage tanks that distribute and store the raw oil based on the properties of the raw oil; A base oil preparation facility having at least one facility selected from the following facilities (1) and (2): Equipment (1) Equipment for converting the stock oil distributed to the multiple storage tanks into base oil without mixing it with other stock oils Equipment (2) Equipment for mixing at least two of the raw oils distributed to the plurality of storage tanks to produce base oil. A base oil producing apparatus comprising: a shipping facility for shipping the base oil supplied from the base oil preparation facility; The idea is to have the following.

[0069] The base oil production and logistics composite system of this embodiment has a raw oil storage facility and a base oil preparation facility, and therefore can be said to be a composite system equipped with the base oil production device of this embodiment. Therefore, the base oil production and logistics composite system of this embodiment is easy to implement the base oil production method of this embodiment, so it can efficiently respond to the supply of various waste oils and recycled oils, and can produce and ship base oils in response to various base oil demands.

[0070] (Feedstock oil storage facilities and base oil preparation facilities) The feedstock oil storage facility and base oil preparation facility in the composite system for base oil production and distribution of this embodiment are the same as those described above in the base oil production apparatus of this embodiment.

[0071] (Feedstock oil receiving facility) The feedstock oil receiving facility is a facility that receives at least one type of feedstock oil selected from waste oil and recycled oil. The feedstock oil receiving facility has pipes, nozzles, etc. as feedstock oil receiving means for transferring the feedstock oil from a transportation means such as a tanker or tank truck that has transported the feedstock oil to a storage tank or a receiving tank that is provided as needed. It may also have a flow meter to manage the amount of received feedstock oil, and may also have a pump to transfer the feedstock oil to the storage tank or receiving tank, or from the receiving tank to the storage tank, as needed.

[0072] (Shipping equipment) The shipping facility is a facility for shipping the base oil supplied from the base oil preparation facility. The shipping facility has piping, connection nozzles, etc. as base oil shipping means for shipping the base oil, i.e., for transferring the base oil to transportation means such as a tanker or tank truck.

[0073] The shipping facility may have a product tank for temporarily storing the base oil before shipping. By having the product tank, working hours can be adjusted. A pump may be provided to transfer the base oil from the storage tank to the product tank, and from the storage tank and the product tank to transportation means such as a tanker, a tank truck, etc. A flow meter may also be provided to manage the amount of product shipped.

[0074] (Application) As described above, the base oil production and logistics complex system of this embodiment can efficiently respond to the supply of various waste oils and recycled oils, and can produce and ship base oils in response to demand for various base oils. Therefore, the base oil production and logistics integrated system of this embodiment can accommodate the production and logistics of base oils used for any purpose, such as lubricating oil base oil, fertilizer base oil (for waste oil fertilizer, etc.), soap base oil (for recycled soap, etc.), paint base oil (for waste oil paint, etc.), fuel oil for direct-fire industrial furnaces (mainly used in fields (factories) such as aluminum recycling, lime production, steel, and papermaking), boiler fuel oil, diesel fuel oil, and marine fuel oil.

[0075] Considering the features of the base oil production and logistics complex system of this embodiment, such as its ability to accommodate the supply of various waste oils and recycled oils and to meet the demand for various base oils, in particular its ease of adapting to the required properties of the desired base oil, and the fact that large demand is expected, it is preferable to use it as a production and logistics complex system for various fuel oils such as fuel oil for direct-fire industrial furnaces, boiler fuel oil, diesel fuel oil, and marine fuel oil, especially marine fuel oil.

Claims

1. A raw oil storage step of distributing and storing at least one raw oil selected from waste oil and recycled oil in any one of a plurality of storage tanks based on the properties of the raw oil; A base oil preparation step including at least one step selected from the following steps (1) and (2): Step (1) A step of converting the stock oil distributed to the plurality of storage tanks into base oil without mixing it with other stock oils. Step (2) mixing at least two of the stock oils distributed to the plurality of storage tanks to obtain a base oil. and The properties of the feedstock oil are sulfur content or sulfur content and gross calorific value, The base oil is used for marine fuel oil. Method for producing base oil.

2. The method for producing a base oil according to claim 1, further comprising the step of refining the feedstock oil.

3. The method for producing a base oil according to claim 1 or 2, further comprising the step of refining the feedstock oil stored in the storage tank.

4. 4. The method for producing a base oil according to claim 2, wherein the refining treatment is at least one treatment selected from the group consisting of filtration, desalting, dehydration, desulfurization, ash reduction, sludge reduction, and fractional distillation.

5. The method for producing a base oil according to any one of claims 1 to 4, further comprising a processing step of treating waste oil to produce recycled oil.

6. The method for producing a base oil according to any one of claims 1 to 5, wherein additives are mixed into the base oil in the base oil preparation step.

7. A raw oil storage facility having a plurality of storage tanks that distribute and store at least one raw oil selected from waste oil and recycled oil based on the properties of the raw oil; A base oil preparation facility having at least one facility selected from the following facilities (1) and (2): Equipment (1) Equipment for converting the stock oil distributed to the plurality of storage tanks into base oil without mixing it with other stock oils (2) Equipment for mixing at least two of the feedstock oils distributed to the plurality of storage tanks to produce base oil. and, The properties of the feedstock oil are sulfur content or sulfur content and gross calorific value, The base oil is used for marine fuel oil. Base oil manufacturing equipment.

8. The base oil production apparatus according to claim 7, further comprising a refining facility for refining the feedstock oil.

9. 9. The base oil production apparatus according to claim 7 or 8, further comprising a refining facility for refining the feedstock oil stored in the storage tank.

10. The base oil production apparatus according to any one of claims 7 to 9, further comprising a treatment facility for treating waste oil to produce recycled oil.

11. a feed oil receiving facility for receiving at least one feed oil selected from waste oil and recycled oil; a raw oil storage facility having a plurality of storage tanks that distribute and store the raw oil based on the properties of the raw oil; A base oil preparation facility having at least one facility selected from the following facilities (1) and (2): Equipment (1) Equipment for converting the stock oil distributed to the plurality of storage tanks into base oil without mixing it with other stock oils (2) Equipment for mixing at least two of the feedstock oils distributed to the plurality of storage tanks to produce base oil. A base oil producing apparatus comprising: a shipping facility for shipping the base oil supplied from the base oil preparation facility; Equipped with The properties of the feedstock oil are sulfur content or sulfur content and gross calorific value, The base oil is used for marine fuel oil. A complex system for base oil production and logistics.

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