Ship-end-to-ship-end marine biological fuel oil and on-line preparation method thereof

Abstract

The invention relates to ship-end-to-ship-end marine biological fuel oil and an online modulation method thereof, and the method comprises the following steps: detecting the air height change of a biodiesel storage cabinet and the air height change of a fuel oil storage cabinet before and after discharging through a gauge method; the rated cabin capacity Vb change of the biodiesel storage cabinet and the fuel oil storage cabinet is obtained based on the corresponding cabin capacity table; the change of the corrected oil volume Vt is calculated according to Vt = Vb * [1 + 3 alpha (t-20)], and t is the average temperature of the bulkhead, DEG C; alpha is a cabin material linear expansion coefficient; the change of Vt is the release volume of the biodiesel and the release mass of the marine fuel oil, calculating the release mass of the biodiesel and the release mass of the marine fuel oil according to the oil density, enabling the release mass to meet a set mass ratio, and mixing to obtain the marine biological fuel oil. Compared with the prior art, the method has the advantages that the problem of accurate fuel metering under the condition of no mass flow meter is solved, the method is accurate in mixing proportion, the quality and the performance of the biological fuel oil are ensured, and reliable support is provided for a ship-end-to-ship-end filling mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of biofuel oil, and relates to a ship-to-ship marine biofuel oil and an on-line modulation method thereof. Background Art

[0002] With the reduction of global dependence on fossil fuels and the pursuit of sustainable energy solutions, traditional oil resources are facing increasingly severe challenges. The increasing depletion of oil resources may lead to a continuous rise in the price of fuels in the transportation field. Against this background, the international community and governments of various countries have begun to vigorously promote the recycling of waste resources and the development of renewable energy to meet the higher standards of energy conservation and emission reduction.

[0003] As a renewable fuel prepared from waste cooking oil and vegetable oil, biodiesel has good sustainability and emission reduction potential. Its wide application in marine fuel oil can not only significantly reduce the carbon footprint of the shipping industry, but also promote the development of related industries such as agriculture and biotechnology, providing power support for the transformation to a green economy. When the fueling ship is empty, the incoming oil process of biodiesel can reach the onshore storage tank by road transportation ( Figure 1 ), and then the fueling ship can be refueled through the interface of the onshore storage tank. However, the shipping industry, as a key pillar of global trade, faces the dual challenges of decarbonization and energy transformation. Achieving zero-carbon shipping requires a large amount of infrastructure to produce and distribute new fuels, and at the same time, the existing ship fueling systems need to adapt to these energies to meet the requirements of efficient and safe fuel supply. Coastal areas have great potential for producing zero-carbon fuels, but currently, it is urgent to solve the technical bottlenecks of real-time modulation and safe fueling of ship fuels. Under the existing conditions, solving the control problem of precise proportion mixing and on-site modulation in the ship-to-ship mode is conducive to the accurate refueling and use of ships, thus helping to promote and use.

[0004] It is also very difficult to handle the refueling of marine biofuel oil from ship to ship. Due to the large fuel consumption and demand of ships, it is determined that large-sized fueling hoses and couplings are required for ship refueling. At the same time, due to the swaying motion of the two ships in the water, it is very difficult to align the ship-to-ship, which is not only time-consuming but also dangerous for the operator, and may seriously damage the equipment and the ship in severe cases. It is necessary to focus on solving the problems of correct connection and alignment of the nozzle and the receiver during the coupling of parts in the refueling process and safe fixation to prevent the ship from shaking. To sum up, it is very necessary to on-site online modulate the biodiesel transported to the refueling ship and marine fuel oil into marine biofuel oil on the ship and refuel large ships in a safe refueling manner. Summary of the Invention

[0005] The object of the present invention is to provide a marine biofuel oil for ship-to-ship use with excellent performance, simplicity and high efficiency, and an on-line modulation method thereof. Based on the method of combining the calculation of the oil level in the biodiesel storage tank and the oil level in the fuel oil storage tank by using the ullage measurement method, the problem of accurately modulating the B24 marine biofuel for ship-to-ship use under the condition of no mass flowmeter is solved, so as to realize the correct control of the components and content of the biofuel oil added to large ships according to the technical layout of the existing fueling ship and the characteristics of the fuel tank compartment.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] The first aspect of the present invention provides a modulation method for marine biofuel oil for ship-to-ship use, and the method includes the following steps:

[0008] Detect the change in the ullage of the biodiesel storage tank before and after discharging, and the change in the ullage of the fuel oil storage tank by using the ullage measurement method, and obtain the rated tank volume V of the biodiesel storage tank and the fuel oil storage tank based on the corresponding tank volume table b change;

[0009] Calculate the change in the corrected oil volume V t according to Equation (1), which is the volume of biodiesel discharged and the volume of marine fuel oil discharged. Calculate the mass of biodiesel discharged and the mass of marine fuel oil discharged according to the oil density, and make them meet the set mass ratio;

[0010] V t = V b ×[1 + 3α(t - 20)] (1)

[0011] In Equation (1), t is the average temperature of the tank wall, °C; α is the linear expansion coefficient of the tank material;

[0012] Mix the discharged biodiesel and marine fuel oil according to the set mass ratio and stir to obtain marine biofuel oil.

[0013] Furthermore, the biodiesel is prepared by processing one or more renewable raw materials, and the renewable raw materials include kitchen waste oil, soybean oil, corn oil, peanut oil, rapeseed oil, palm oil, sesame oil, sunflower oil, flaxseed oil, cottonseed oil, linseed oil, safflower oil, hemp oil, sesame oil, camellia seed oil, peony seed oil, walnut oil, coconut oil, olive oil.

[0014] Furthermore, the set mass ratio of the biodiesel and the marine fuel oil is 24:76.

[0015] Further, before detecting the ullage of the biodiesel storage tank by the ullage method, heat the biodiesel storage tank to above 10 °C to avoid blockage of the filter and difficulty in pumping caused by crystal formation and oil solidification in a low-temperature environment.

[0016] Further, before detecting the ullage of the fuel oil storage tank by the ullage method, heat the fuel oil storage tank to 40 °C to reduce the viscosity and optimize the pumping efficiency and subsequent mixing uniformity of the fuel.

[0017] Further, when using the ullage method, ensure that the oil surface is stable, the foam is eliminated, and the electrostatic interference is excluded before taking the reading, avoid the influence of electrostatic interference, foam interference, etc. on the measurement accuracy, ensure the stability of the measurement environment, and at least repeat the measurement twice by the multi-point measurement method or the stratified measurement method (if the difference between the two readings is ≤ 1 mm, take the average value; otherwise, re-measure).

[0018] Further, the original data measured by the ullage method is corrected based on the following formula (2) to obtain the ullage.

[0019] Ullage = Original data - Trim correction value - List correction value (2)

[0020] Further, the trim correction value and the list correction value are obtained according to the "Regulations for the Weight Appraisal of Import and Export Commodities".

[0021] Further, the trim correction value and the list correction value are obtained according to "SN / T 3023.2-2021 Regulations for the Weight Appraisal of Import and Export Commodities - Part 2: Draft Survey".

[0022] Further, the discharged mass of the biodiesel and the discharged mass of the marine fuel oil can be calculated by formula (3):

[0023] Mass (m) = Volume (V t ) × Density (ρ) (3)

[0024] Further, in the mixing, the biodiesel and the marine fuel oil are transported to the mixing tank for mixing. The mixing tank is equipped with a blowing circulation stirring system.

[0025] Further, in the stirring, the stirring time is 1 - 2 h and the stirring temperature is 40 °C to ensure the uniformity of the composition of the mixture. After stirring, use a high-efficiency gear pump to transport the mixed fuel to the daily use oil tank to obtain the marine biofuel oil.

[0026] The second aspect of the present invention provides a marine biofuel oil prepared by the above method.

[0027] Further, the density (20 °C) of the marine biofuel oil is 936.2 kg / m 3; The viscosity (at 50 °C) is 47.40 cSt. This marine biofuel oil is a B24 - specification biofuel oil, which has good environmental protection performance and can meet the technical requirements of modern marine diesel engines.

[0028] Furthermore, the net calorific value of the marine biofuel oil is 40.

[0029] The present invention also provides a marine biofuel oil safety filling connection structure from ship to ship. The general filling interface on the filling ship is connected to the oil receiving interface on the receiving ship through a special flexible transition coupling device, realizing the flexible spanning alignment between the general filling interface of the filling ship and the general oil receiving interface of the receiving ship, and solving the alignment problem in ship filling and the problem of unstable freedom of ship sway.

[0030] Furthermore, the special flexible transition coupling device includes a hose and a hose support member. The hose support member includes at least one of a sling, an elastic support ball disposed under the hose, and a T - shaped support frame.

[0031] Furthermore, the sling is a multi - point sling, and this sling avoids the direct contact between the outer surface of the hose and the lifting steel cable. Compared with the traditional single - point sling, it prevents the phenomenon that the end of the hose sags due to single - point lifting, thus affecting the filling process.

[0032] Furthermore, when the special flexible transition coupling device is properly tightened upwards, the oil receiving interface and the filling interface can achieve safe connection engagement and stable alignment.

[0033] Furthermore, when the filling operation process is professionally evaluated and it is considered that the ship sway is extremely small and will not have a safety impact on the water filling, the flexible pipeline spanning connection method can also be simplified and cancelled, and the oil receiving interface connection hose can be used to fill large ships in a safe filling method with flexible or rigid support or suspension.

[0034] The present invention provides a device with the above-mentioned safe filling connection structure. Through the optimized configuration of the fuel storage system of the filling ship and the introduction of special devices, it ensures the precise mixing and filling process of biodiesel and marine fuel oil at a ratio of 24:76. The realization of this method mainly depends on the detection of the change in the ullage height of the biodiesel storage tank and the fuel oil storage tank before and after discharging by using the dipstick method in the modulation of biofuel oil on the filling ship in the absence of a mass flowmeter, and obtaining the rated tank volume of the biodiesel storage tank and the fuel oil storage tank by referring to the corresponding tank capacity table based on the ullage height, accurately calculating the mass mixing ratio of B24 biofuel oil, and setting the optimal fuel storage temperature control system to keep the biodiesel at 10°C and heat the fuel oil to 40°C. The receiving oil interface positions the pipeline longitudinally through a variety of provided special flexible transition connector devices and has a flexible or rotating conduit connection with the fixed fuel compartment on the receiving ship to allow such positioning.

[0035] The present invention also provides an improved method for connecting a hose during fuel filling, which can ensure the safety and reliability of the hose during connection and use. The specific solution is as follows:

[0036] When connecting the hoses (filling hose and receiving hose), excessive force should be avoided to prevent damage caused by the torsion and extrusion of the berth and the oil tanker; the hose should be designed with a sufficient flexure radius to adapt to the small movements of the ship and prevent damage due to excessive bending; appropriate protective measures should be taken at the parts where the hose contacts the berth or other structural components of the ship to prevent friction and wear; direct contact between the hose and high-temperature surfaces such as steam pipelines should be avoided to prevent thermal damage; when lifting the hose, a multi-point lifting method should be used to avoid direct contact between the outer surface and the lifting wire rope, ensuring that the hose maintains a flexure radius not less than the manufacturer's regulations; for the case of using a single lifting point such as a cantilever crane, special slings and brackets should be used to support the entire hose to ensure that the weight applied to the cargo oil main pipe is appropriate and avoid being too heavy. The above-mentioned improved fuel filling hose connection design ensures the safety and reliability of the filling process. By avoiding excessive force connection, designing a sufficient flexure radius, adopting protective measures, avoiding contact with high-temperature surfaces, multi-point lifting, and using special slings and brackets, the risk of hose damage is reduced, including multiple measures to prevent mechanical damage, thermal damage, and wear, significantly improving the operation safety and reliability.

[0037] Compared with the prior art, the present invention has the following characteristics:

[0038] 1) The present invention proposes a method for on-site online modulation of a specific proportion of marine biofuel oil from ship to ship, which is excellent in performance, simple and efficient. Without a mass flowmeter, based on the dipstick method, it realizes the accurate online metering of the mass of biodiesel and marine fuel oil, solves the problem of accurate fuel metering without a mass flowmeter. This method has an accurate mixing ratio, ensures the quality and performance of the marine biofuel oil, and has high precision and repeatability. It is applicable to various ship types and oil product characteristics, and provides reliable support for the ship-to-ship refueling mode;

[0039] 2) The present invention uses the dipstick method, combined with liquid level measurement, temperature correction and hull inclination correction, to solve the problem of accurate fuel metering without a mass flowmeter. Through the heating treatment of the fuel storage tank and the in-loop stirring technology in the mixing chamber, it ensures the fluidity and mixing uniformity of the oil product in a low-temperature environment;

[0040] 3) The preparation process of the marine biofuel oil of the present invention is simple and easy to implement on board. The prepared marine biofuel oil has excellent performance, is environmentally friendly, meets the use standards of marine diesel engines, reduces the dependence on traditional fossil fuels, reduces greenhouse gas emissions, and is beneficial to environmental protection. Brief Description of the Drawings

[0041] Figure 1 It is a technical schematic diagram of the process of mixing biofuel oil and fuel oil in a tank truck for the preparation of marine biofuel oil for highway oil inlet;

[0042] Figure 2 It is a technical schematic diagram of the process of mixing biofuel oil and fuel oil on board for the preparation of marine biofuel oil for the waterway oil inlet of the present invention;

[0043] Figure 3 It is the specific implementation manner for the safe refueling of marine biofuel oil on board in the improved ship departure process of the present invention;

[0044] Figure 4 It is various specific implementation manners for the safe refueling of marine biofuel oil on board in the improved ship departure process of the present invention;

[0045] Description of the Reference Numerals in the Drawings:

[0046] 1 - Fueling interface, 2 - Special flexible transition coupling device, 3 - Oil receiving interface; A - Correct hose handling arrangement, B - Incorrect hose handling arrangement. Detailed Description of the Invention

[0047] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives the detailed implementation manner and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0048] The following are more detailed implementation cases to further illustrate the technical solutions of the present invention and the achievable technical effects through the following implementation cases.

[0049] In the following embodiments, unless otherwise specified for raw material reagents or processing techniques, it means that they are all conventional commercially available products or conventional processing techniques in the art.

[0050] The biodiesel in the following embodiments comes from Sinopec Zhonghai Marine Fuel Supply Co., Ltd., and this biodiesel meets the quality standard of "Marine Biofuel Oil".

[0051] Example 1:

[0052] An on-line modulation method for marine biofuel oil from ship to ship ( Figure 2 ), the method includes the following steps:

[0053] S1: Store the biodiesel on one side of the fuel storage tank (biodiesel storage tank) of the fueling ship, and at the same time store the marine fuel oil (fuel oil) in another independent fuel storage tank (fuel oil storage tank) on the other side to ensure physical isolation between different fuels;

[0054] S2: Conduct temperature control heating treatment on the biodiesel storage tank, raise the storage temperature to above 10°C to avoid the risk of crystal blockage of the filter and pipeline in a low-temperature environment and ensure fuel fluidity; at the same time, heat the marine fuel oil storage tank to about 40°C to improve fuel fluidity and optimize subsequent mixing uniformity; among them, the heating process refers to ASTM D6751 standard to ensure that the temperature is higher than the cloud point (CP), pour point (PP) and cold filter plugging point (CFPP) of the fuel;

[0055] S3: In the case of no mass flow meter, use the dipstick method to detect the change in ullage of the biodiesel storage tank before and after discharging, and the change in ullage of the fuel oil storage tank, and obtain the rated tank volume V b of the biodiesel storage tank and the fuel oil storage tank based on the ullage by referring to the corresponding tank volume table; when using the dipstick method, it should be ensured that the oil surface is stable, the foam is eliminated and the electrostatic interference is excluded before reading to avoid the influence of electrostatic interference, foam interference, etc. on the measurement accuracy, ensure the stability of the measurement environment, and repeat the measurement twice by the multi-point measurement method or the stratified measurement method, and take the average value to ensure the accuracy. In addition, the ullage is obtained after being corrected according to the following formula (2):

[0056] Ullage = original data - longitudinal inclination correction value - transverse inclination correction value (2)

[0057] Among them, the trim correction value and the list correction value are obtained according to (SN / T 3023.2-2021 Rules for the Weight Appraisal of Import and Export Commodities - Part 2: Draft Survey). The original data is the ullage before correction. The ullage is the space height between the liquid level and the reference point of the gauge pipe. The reference height is the vertical height between the upper and lower measurement reference points of the gauge pipe. The trim value is the difference between the draft value at the stern and the draft value at the bow of the ship.

[0058] S4: Calculate the corrected oil volume V by combining correction parameters such as temperature and density. t The change of, the calculation formula is shown in Equation (1), V t The change of is the volume of biodiesel released and the volume of marine fuel oil released. Calculate the mass of biodiesel released and the mass of marine fuel oil released according to the oil density, and make it meet the set mass ratio;

[0059] V t = V b ×[1 + 3α(t - 20)] (1)

[0060] In Equation (1), t is the average temperature of the bulkhead, °C; α is the linear expansion coefficient of the bulkhead material;

[0061] Among them, the mass of biodiesel released and the mass of marine fuel oil released can be calculated by Equation (3):

[0062] Mass (m) = Volume (V t ) × Density (ρ) (3)

[0063] S5: According to the mass ratio of 24:76, transport the released biodiesel and marine fuel oil to the mixing tank, and continuously stir them for at least 1 hour through the air blowing and circulating stirring system in the mixing tank to ensure the full mixing and composition uniformity of the fuel, and obtain B24 marine biofuel oil.

[0064] S6: Transport the B24 marine biofuel oil in step S5 to the daily service oil tank through an oil pump to meet the technical requirements of on - ship online mixing and real - time refueling.

[0065] In the above step S3, the specific steps and precautions for measuring the ullage change of biodiesel by manual gauging method are as follows: First, for the temperature of the oil product, a high-precision thermometer must be used for accurate measurement, and this key parameter should be recorded. Second, the initial liquid level height of the oil product needs to be carefully observed. To ensure the accuracy of the measurement, the reading must be taken when the oil surface is stable and without fluctuations. At the same time, factors that may affect the measurement result, such as static electricity interference and foam interference, should be excluded. The static method can be used to make the oil surface naturally stable, or a professional defoamer can be used to remove the foam to ensure the purity and stability of the measurement environment. Finally, it must be ensured that the free water has completely separated out and precipitated at the bottom or a specific area of the oil product before measurement. After the above work is completed, a combination of multiple methods such as multi-point measurement method and stratified measurement method is adopted to improve the accuracy and reliability of the measurement. This method ensures the fuel quality while achieving the high efficiency and safety of the operation.

[0066] Embodiment 2:

[0067] This embodiment provides a variety of ship-to-ship marine biofuel oil safety filling connection structures. Figure 3 For the specific implementation method of improving the shipyard shipping process for the safe filling of marine biofuel oil on board. Figure 4 For various specific implementation methods of improving the shipyard shipping process for the safe filling of marine biofuel oil on board. It can be seen that the general filling interface 1 on the filling ship is connected to the oil receiving interface 3 on the receiving ship through a special flexible transition coupling device 2. Among them, the special flexible transition coupling device 2 includes a hose and a hose support member. The hose support member includes a multi-point sling, an elastic support ball or a T-shaped support frame pad under the hose. Among them, the oil receiving interface 3 positions the pipeline longitudinally through the provided variety of special flexible transition coupling devices 2. When the special flexible transition coupling device 2 is correctly tightened upward, the oil receiving interface 3 and the filling interface 1 can achieve safe connection engagement and stable alignment, realizing the flexible spanning alignment between the filling interface 1 and the oil receiving interface 3, and solving the alignment problem of ship filling and the problem of unstable freedom of ship swaying.

[0068] In addition, during the connection process of the filling hose and the receiving hose, avoid using excessive force to prevent damage caused by the torsion and extrusion between the berth and the oil tanker. The hose should be designed with a sufficient flexural radius to accommodate the minor movements of the ship and prevent damage due to excessive bending. At the parts where the hose contacts the berth or other structural components of the ship, adopt appropriate protective measures, such as using protective sleeves or gaskets, to prevent friction and wear. Avoid direct contact between the hose and high-temperature surfaces such as steam pipelines to prevent thermal damage. When lifting the hose, use a multi-point lifting method to avoid direct contact between the outer surface and the lifting wire rope, and ensure that the hose maintains a flexural radius not less than that specified by the manufacturer. For the case of using a single lifting point such as a cantilever crane, use special slings and brackets to support the entire set of hoses to ensure that the weight applied to the cargo oil main pipe is appropriate and avoid being too heavy.

[0069] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A method for preparing marine biofuel oil from end to end, characterized in that: The method comprises the following steps: The height change of the biodiesel storage tank and the fuel storage tank before and after discharge is detected by the ruler method, and the rated tank capacity V of the biodiesel storage tank and the fuel storage tank is obtained based on the corresponding tank capacity table. b change; According to formula (1), calculate the corrected oil volume V t The change is the volume of biodiesel released and the volume of marine fuel oil released. The mass of biodiesel released and the mass of marine fuel oil released are calculated according to the density of the oil liquid, and they are made to meet the set mass ratio; V t =V b ×[1+3α(t-20)] (1) In formula (1), t is the average temperature of the bulkhead, °C; α is the linear expansion coefficient of the bulkhead material; The released biodiesel is mixed with marine fuel oil according to a set mass ratio and stirred to obtain marine biofuel oil.

2. The method for online preparation of marine biofuel oil from end to end according to claim 1, characterized in that: The biodiesel is prepared by processing one or more renewable raw materials, and the renewable raw materials include waste cooking oil, soybean oil, corn oil, peanut oil, rapeseed oil, palm oil, sesame oil, sunflower oil, sesame oil, cottonseed oil, flax oil, safflower seed oil, hemp oil, sesame oil, camellia oil, peony seed oil, walnut oil, coconut oil, and olive oil.

3. The method for online preparation of marine biofuel oil from end to end according to claim 1, characterized in that: The set mass ratio of the biodiesel to the marine fuel oil is 24:

76.

4. The method for online preparation of marine biofuel oil from end to end according to claim 1, characterized in that: Before detecting the empty height of the biodiesel storage tank by the ruler method, the biodiesel storage tank is heated to above 10°C.

5. The method for online preparation of marine biofuel oil from end to end according to claim 1, characterized in that: Before the empty height of the fuel storage tank is detected by the ruler method, the fuel storage tank is heated to 40°C.

6. The method for online preparation of marine biofuel oil from end to end according to claim 1, characterized in that: The original data measured by the ruler method is corrected based on the following formula (2) to obtain the above-mentioned height: Clearance height = original data - pitch correction value - roll correction value (2).

7. The method for online preparation of marine biofuel oil from end to end according to claim 1, characterized in that: During the stirring, the stirring time is 1-2 hours and the stirring temperature is 40°C.

8. A marine biofuel oil, characterized in that: It is prepared by the method according to any one of claims 1 to 7.

9. The method for online preparation of marine biofuel oil from end to end according to claim 8, characterized in that: The density of the marine biofuel oil (20°C) is 936.2 kg / m 3 ; Viscosity (50℃) is 47.40cSt.

10. The marine biofuel oil according to claim 8, characterized in that: The net calorific value of the marine biofuel oil is 40.

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