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Straight-run diesel oil deacidification method and device for achieving same

A technology for straight-run diesel oil and deacidification, which is applied in the direction of multi-stage series-connected refining process treatment, etc., can solve the problems of long time required, high cost, and no problems, and achieves simple structure, convenient operation, and easy implementation of the production device. Effect

Inactive Publication Date: 2012-01-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The settling tank has the characteristics of simple structure and stable operation, but due to gravity separation, it will cause problems such as low separation efficiency, long time required, large equipment volume, high cost, serious material consumption and energy consumption.
And the use of settling tanks for deacidification of straight-run diesel oil is prone to serious blockage in the lower section due to the generation of polymers
Although the separation efficiency is high by using fiber membrane separation, the cost is also high, and it occupies a large area, easy to block, and difficult to maintain
The disadvantage of the coalescer is that there is no general standard for the design of the size of the coalescer, and there is no accurate method to determine how much filtration capacity the filter element of the coalescer needs under a given flow rate.
In addition, the research on the relationship between the filtration capacity of the filter and the filtered substance is not sufficient, and it is easy to cause clogging when the liquid is not clean.
[0005] So far, the method for solving the above-mentioned technical problems has not been proposed in the prior art

Method used

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  • Straight-run diesel oil deacidification method and device for achieving same
  • Straight-run diesel oil deacidification method and device for achieving same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Attached figure 1 Shown is the process of straight-run diesel oil deacidification, where

[0038] 1. Material properties

[0039] (1) Raw material oil: flow rate is 10t / h, temperature is 65°C, density is 824kg / m3, acidity is 27.5mg / (100ml)

[0040] (2) Alkali: the mass fraction of alkali injection (when the rate of alkali injection solution is constant, the sodium hydroxide in the alkali injected in the device accounts for the percentage of the total mass of the solution) is 15%, the flow rate is 1.5t / h, and the temperature is 65 ℃

[0041] (3) Demineralized water: the flow rate is 0.8t / h, the temperature is 65°C, and the density is 1000kg / m3

[0042]2. The motor speed of centrifugal extraction separator is 900r / min.

[0043] 3. Content determination method

[0044] (1) Measuring method of acidity of refined oil products: infrared absorption spectrometry

[0045] (2) Measuring method of oil content in alkali slag: fluorescence analysis method

[0046] (3) Measuri...

Embodiment 2

[0052] 1. Material properties

[0053] (1) Raw material oil: flow rate is 10t / h, temperature is 65°C, density is 824kg / m3, acidity is 27.5mg / (100ml)

[0054] (2) Alkali: the mass fraction of alkali injection (when the rate of alkali injection solution is constant, the sodium hydroxide in the alkali injected in the device accounts for the percentage of the total mass of the solution) is 12%, the flow rate is 1.5t / h, and the temperature is 65 ℃

[0055] (3) Demineralized water: the flow rate is 0.8t / h, the temperature is 65°C, and the density is 1000kg / m3

[0056] 2. The motor speed of centrifugal extraction separator is 900r / min.

[0057] 3. Content determination method

[0058] (1) Measuring method of acidity of refined oil products: infrared absorption spectrometry

[0059] (2) Measuring method of oil content in alkali slag: fluorescence analysis method

[0060] (3) Measuring method of water content in refined oil products: capacitive sensor method

[0061] 4. Applicati...

Embodiment 3

[0066] 1. Material properties

[0067] (1) Raw material oil: the flow rate is 10t / h, the temperature is 65°C, the density is 825kg / m3, and the acidity is 27.5mg / (100ml)

[0068] (2) Alkali: the mass fraction of alkali injection (when the rate of alkali injection solution is constant, the sodium hydroxide in the alkali injected in the device accounts for the percentage of the total mass of the solution) is 10%, the flow rate is 1.5t / h, and the temperature is 65 ℃

[0069] (3) Demineralized water: the flow rate is 0.8t / h, the temperature is 65°C, and the density is 1000kg / m3

[0070] 2. The motor speed of centrifugal extraction separator is 900r / min.

[0071] 3. Content determination method

[0072] (1) Measuring method of acidity of refined oil products: infrared absorption spectrometry

[0073] (2) Measuring method of oil content in alkali slag: fluorescence analysis method

[0074] (3) Measuring method of water content in refined oil products: capacitive sensor method

...

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Abstract

The invention provides a novel straight-run diesel oil deacidification method. The method comprises the step of carrying out extraction separation on diesel oil in an alkali washing and deacidification process by utilizing a centrifugal extraction separator so that the acidity of the diesel oil is less than 1.5mg / (100ml), and the mass fraction of oil in alkali slag is less than 2%. The invention also provides a straight-run diesel oil deacidification device. By the method and device provided by the invention, the separation efficiencies of alkali washing and water washing in the diesel oil deacidification process are improved, separation time is reduced, investment is small, and applicability is strong. The method and device provided by the invention are suitable for extraction separation occasions which have the requirements of small two-phase density difference, large viscosity, short separation time and the like in a petrochemical industry.

Description

technical field [0001] The invention relates to a method and device for deacidifying straight-run diesel oil, more specifically, the invention relates to a method and a device for carrying out alkali-elution deacidification of straight-run diesel oil by using a centrifugal extraction separator. technical background [0002] With the continuous development of oilfields, some domestic crude oils are characterized by high viscosity and high acidity. Naphthenic acid is the most important acidic oxygen-containing compound in petroleum, and its mass fraction accounts for about 90% of the total acidic substances. The acidity (acid value) of oil products is mainly caused by this. In the processing of petroleum and its distillates, naphthenic acid, due to its acidity and viscosity, not only causes great corrosion to the production equipment, but also has a great impact on the quality of diesel products, such as reducing the stability of diesel oil and making diesel oil easy to Emuls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/12
Inventor 白志山徐艳唐康郝萌萌
Owner EAST CHINA UNIV OF SCI & TECH
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