A process for extracting wax from a 0 number diesel fuel

Abstract

The application discloses a method for extracting wax from No.0 diesel oil, and the method comprises the following steps: step 1, irradiating and heating No.0 diesel oil by 3-10 DEG C, and the spectrum wavelength during irradiation is 532-808 nm; step 2, spraying the heated No.0 diesel oil on the surface of a cooling object; and step 3, collecting the diesel oil dropped from the surface of the cooling object. The application effectively separates the wax components from No.0 diesel oil, so that the flowability of the No.0 diesel oil at a lower temperature is improved.

Description

Technical Field

[0001] This invention belongs to the field of diesel dewaxing technology, and particularly relates to a method for extracting wax from No. 0 diesel fuel. Background Technology

[0002] With the acceleration of industrialization, diesel fuel, as an important energy source, plays an indispensable role in transportation, industrial production, and other fields. However, the fluidity of diesel fuel at low temperatures has always been a problem plaguing the industry. Especially in cold regions, the waxy components in diesel fuel are prone to crystallization and precipitation, causing the fuel to solidify and affecting the normal operation of engines. For No. 0 diesel fuel, which maintains its fluidity even at 0°C, the extraction and separation technology of its waxy components is particularly crucial.

[0003] Traditional dewaxing processes, such as benzene dewaxing, separate wax and oil by utilizing the difference in solubility in benzene. However, because wax and oil have similar specific gravities, this separation process is inefficient and costly. Furthermore, this process also presents problems related to environmental pollution and operational safety.

[0004] In recent years, foreign researchers have developed a pour point depressant to lower the freezing point of diesel fuel by adding it to the diesel. Although this method improves the low-temperature fluidity of diesel fuel to some extent, the effect is limited, typically only lowering the applicable temperature of diesel fuel to around -10 degrees Celsius, which is insufficient to meet the needs of even lower temperature environments.

[0005] Therefore, the pressing technical problem is how to effectively separate waxy components from No. 0 diesel oil to improve its fluidity at lower temperatures. Solving this problem requires overcoming the following difficulties:

[0006] 1. Separation challenges due to similar specific gravities: The similar specific gravities of wax and oil make traditional physical separation methods difficult to implement.

[0007] 2. Cost control: Existing dewaxing processes are costly, which is not conducive to large-scale commercial application.

[0008] 3. Environmental protection and safety: The dewaxing process needs to be environmentally friendly while ensuring the safety of the operation process. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a method for extracting wax from No. 0 diesel oil, which effectively separates waxy components from No. 0 diesel oil to improve its fluidity at lower temperatures, in order to address the shortcomings of the prior art.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for extracting wax from No. 0 diesel oil, comprising the following steps:

[0011] Step 1: Irradiate No. 0 diesel fuel to raise its temperature by 3°C to 10°C. The spectral wavelength during irradiation is 532nm to 808nm.

[0012] Step 2: Pour the heated No. 0 diesel fuel onto the surface of the cooled object;

[0013] Step 3: Collect the diesel fuel dripping from the surface of the cooled object.

[0014] In the above method for separating wax from No. 0 diesel oil, the surface temperature of the cooled material is -35℃ to 0℃.

[0015] In the above method for separating wax from No. 0 diesel oil, the cooling material is a drum.

[0016] In the above-mentioned method for separating wax from No. 0 diesel oil, the diameter of the roller is 500mm to 100mm.

[0017] In the above-mentioned method for separating wax from No. 0 diesel oil, the drum rotation speed is 20 rpm to 50 rpm, and the amount of No. 0 diesel oil sprayed onto the drum surface is 0.5t to 1.5t per hour.

[0018] In the above method for separating wax from No. 0 diesel oil, the ambient temperature during steps 1 to 3 is 5℃ to 15℃.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. High-efficiency separation: It can efficiently separate waxy components from diesel fuel, improving separation efficiency.

[0021] 2. Low cost: The separation process is low-cost and suitable for large-scale industrial applications.

[0022] 3. Environmentally friendly: The entire separation process has little impact on the environment and does not produce harmful byproducts.

[0023] 4. Operational safety: The process flow is safe and reliable, and easy to operate and control.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a flowchart of the method of the present invention.

[0026] Figure 2 This is a schematic diagram of the device for executing the method of the present invention. Detailed Implementation

[0027] like Figure 1 As shown, a method for extracting wax from No. 0 diesel fuel includes the following steps:

[0028] Step 1: Irradiate No. 0 diesel fuel to raise its temperature by 3°C to 10°C. The spectral wavelength during irradiation is 532nm to 808nm.

[0029] Preferably, the temperature is increased by 5°C during irradiation. In specific implementation, for example... Figure 2 As shown, a long strip-shaped lamp panel is used, with a special fluorescent lamp installed at its bottom. This special fluorescent lamp has a spectral wavelength of 532nm to 808nm. An oil inlet plate is installed at an angle below the lamp panel, so that the No. 0 diesel fuel is heated by the special fluorescent lamp as it flows through the oil inlet plate. When it flows to the outlet of the oil inlet plate, it is heated to 5°C. The flow rate of the No. 0 diesel fuel can be controlled by controlling the tilt angle of the oil inlet plate, thereby controlling its final temperature rise. The temperature change of the No. 0 diesel fuel can be monitored by installing a temperature sensor on the oil inlet plate.

[0030] Step 2: Pour the heated No. 0 diesel fuel onto the surface of the cooled object;

[0031] The outlet of the oil inlet plate is above the cooled object. When No. 0 diesel flows out, it just splashes onto the surface of the cooled object. Because the wavelength of the spectrum is between 532nm and 808nm, when No. 0 diesel is irradiated, only the oil heats up. The wax will reflect the irradiated light and will not heat up significantly. Therefore, when No. 0 diesel is splashed onto the surface of the cooled object, the wax will solidify on the surface of the cooled object when it cools down, while the oil will not solidify, thus separating the oil and wax.

[0032] Step 3: Collect the diesel fuel dripping from the surface of the cooled object.

[0033] Preferably, the cooling material is a drum containing coolant. The drum rotates counterclockwise, and oil flows out and separates from the left side of the drum. A scraper is provided on the right side of the drum to continuously scrape off the wax from the drum surface, thereby achieving a continuous wax separation operation. The drum material can be unpainted metal, unglazed ceramic, or hydrophobic plastic, and the drum surface can be a rough, porous surface to allow for better wax adhesion.

[0034] In this embodiment, the surface temperature of the cooled material is -35°C to 0°C. Preferably, the surface temperature of the cooled material is -35°C, thus obtaining a certain amount of -35 diesel oil. Compared with 0# diesel oil, -35# diesel oil has a lower pour point and is therefore suitable for lower ambient temperatures. Furthermore, there is a significant price difference per ton between 0# diesel oil and -35# diesel oil on the market; therefore, converting 0# diesel oil into -35# diesel oil can generate substantial profits.

[0035] In this embodiment, the diameter of the drum is 500mm to 100mm, the drum rotation speed is 20 rpm to 50 rpm, and the amount of No. 0 diesel oil sprayed on the drum surface is 0.5t to 1.5t per hour.

[0036] Preferably, the diameter of the drum is 800mm, the drum speed is 30 rpm, and the amount of No. 0 diesel oil sprayed on the drum surface is 1t per hour.

[0037] When steps 1 to 3 are performed, the ambient temperature is 5℃ to 15℃. Preferably, the ambient temperature is 10℃.

[0038] Experimental data on wax extraction using No. 0 diesel fuel irradiated with different spectral wavelengths under the following conditions: ambient temperature 10℃, cooling drum diameter 800mm, drum rotation speed 30 rpm, amount of No. 0 diesel fuel poured onto the drum surface 1t per hour, and cooling drum surface temperature -35℃.

[0039]

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for extracting wax from No. 0 diesel fuel, characterized in that, Includes the following steps: Step 1: Irradiate No. 0 diesel fuel to raise its temperature by 3°C to 10°C. The spectral wavelength during irradiation is 532nm to 808nm. Step 2: Pour the heated No. 0 diesel fuel onto the surface of the cooled object; Step 3: Collect the diesel fuel dripping from the surface of the cooled object; The surface temperature of the cooled object is -35℃ to 0℃; When steps 1 to 3 are performed, the ambient temperature is 5℃ to 15℃.

2. The method for extracting wax from No. 0 diesel oil according to claim 1, characterized in that, The cooling material is a drum.

3. The method for extracting wax from No. 0 diesel oil according to claim 2, characterized in that, The diameter of the roller is 500mm to 100mm.

4. The method for extracting wax from No. 0 diesel oil according to claim 3, characterized in that, The drum rotation speed is 20 rpm to 50 rpm, and the amount of No. 0 diesel oil sprayed on the drum surface is 0.5t to 1.5t per hour.

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