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Hydrogen-countercurrent oil hydrogenation technology and device

A technology of oil hydrogenation and gas purification equipment, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, and can solve the problems of isomerization catalyst deactivation, high energy consumption for recycling, and production cost cannot be reduced. , to achieve good activity stability, reduce hydrogen consumption and hydrogen recovery energy consumption, and overcome the effect of shortening the operation cycle

Inactive Publication Date: 2018-08-24
WEIMING BIO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art oil hydrogenation reaction process, on the one hand, the hydrogen-rich gas after the first-stage hydrogenation treatment contains a large amount of sulfur, COx, water, low-carbon hydrocarbons, etc., which can lead to carbon deposition in the bed and second-stage hydroisomerization The deactivation of the isomerization catalyst in the process of pour point depressing treatment shortens the operation cycle and requires frequent shutdowns to replace the catalyst and cannot be recycled directly. Even if the hydrogen can be recovered, the energy consumption for recovery and reuse is high; on the other hand, a hydrotreating stage and The second-stage hydroisomerization and point-point depressing treatment all need to add hydrogen, and hydrogen is an expensive component of raw materials, so the production cost cannot be reduced

Method used

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Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 The shown oil hydrogenation device in the hydrogen countercurrent mode is used for one-stage hydrogenation treatment and two-stage hydroisomerization depreciation treatment of bio-renewable oil, which includes a hydrotreating reactor 1 for performing one-stage hydrogenation treatment, The first separation tank 2 used for the separation of oil, water and gas from the first-stage hydroprocessing product, and the isomerization decompression reactor 3 used for the second-stage hydroisomerization depreciation treatment of the oil phase product separated by the first separation tank 2, The second separation tank 4 for the separation of oil, water and gas from the second-stage hydroisomerization depreciation treatment product, the gas purification device 5 for the de-impurity of the gas separated by the first separation tank 2, and the hydrogen supply for new hydrogen supply Device 6, connected with the second separation tank 4 for the fractionation unit 7 of ...

Embodiment 2

[0029] The oil hydrogenation process of embodiment 2 palm oil hydrogen countercurrent mode

[0030] (1) Palm oil is added to the hydrotreating reactor, and in the presence of hydrogen, it is contacted with a hydrotreating catalyst to carry out one stage of hydrotreating, and the product is separated through the first separation tank to obtain refined oil, hydrogen-rich gas and water (water discarded) go or not);

[0031] (2) Input the refined oil into the isomerization depreciation reactor, and in the presence of hydrogen, contact with the isomerization catalyst for two-stage hydroisomerization depreciation treatment, and the product is separated by the second separation tank to obtain oil phase components and hydrogen-rich gas And water (do not discard the water), the oil phase components are separated by distillation to obtain biomass fuel;

[0032] Among them, the recycling method of hydrogen is: add new hydrogen in the second-stage hydroisomerization decondensation treatm...

Embodiment 3

[0039] (1) Tea oil is added in the hydroprocessing reactor, and in the presence of hydrogen, it is contacted with the hydroprocessing catalyst to carry out one-stage hydroprocessing, and the product is separated through the first separation tank to obtain refined oil, hydrogen-rich gas and water (water is discarded) go or not);

[0040](2) Input the refined oil into the isomerization depreciation reactor, and in the presence of hydrogen, contact with the isomerization catalyst for two-stage hydroisomerization depreciation treatment, and the product is separated by the second separation tank to obtain oil phase components and hydrogen-rich gas And water (do not discard the water), the oil phase components are separated by distillation to obtain biomass fuel;

[0041] Among them, the recycling method of hydrogen is: add new hydrogen in the second-stage hydroisomerization decondensation treatment stage (that is, in the isomerization depointation reactor), and the hydrogen-rich ga...

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Abstract

The invention relates to the field of renewable energy sources, and particularly discloses a hydrogen-countercurrent oil hydrogenation technology and device. The technology includes the following steps that (1) biological renewable oil is in contact with a hydrotreatment catalyst in the presence of hydrogen, first-stage hydrotreatment is carried out, and refined oil is obtained; (2) the refined oil is in contact with a heterogeneous catalyst in the presence of hydrogen, second-stage hydroisomerization pour-point-depressing treatment is carried out, then distillation separation is carried out,and biomass fuel is obtained; the technology is characterized in that new hydrogen is added in the second-stage hydroisomerization pour-point-depressing treatment stage, hydrogen-rich gas obtained after second-stage hydroisomerization pour-point-depressing treatment is cycled to the first-stage hydrotreatment stage, hydrogen-rich gas obtained after the first-stage hydrotreatment stage is subjectedto impurity removing, and then the obtained hydrogen-rich gas and the new hydrogen jointly enter the second-stage hydroisomerization pour-point-depressing treatment stage. According to the hydrogen-countercurrent oil hydrogenation technology and device, the problems that in the prior art, the running period of a device is shortened, and frequent lockout is required to be conducted to replace a catalyst are solved; meanwhile, the used amount and recycling energy consumption of hydrogen are greatly reduced, and the production cost of the oil hydrogenation technology is reduced.

Description

technical field [0001] The invention relates to the field of renewable energy, in particular to a process and device for hydrogenating fats and oils in a hydrogen countercurrent manner. Background technique [0002] The global economic expansion is rapidly driving up demand for energy, oil resources are depleting and their use pollutes – and the need for fuel and reductions in greenhouse gas emissions continues to grow worldwide. As a renewable resource, the comprehensive utilization of bio-oil has been widely valued worldwide. [0003] The first generation of biodiesel (fatty acid methyl ester) produced by transesterification has a mature technology, but its quality is limited by the raw material oil; the by-product glycerin is difficult to separate and purify; the chemical structure is fundamentally different from that of petrochemical diesel, and the oxygen content is high--low temperature flow Poor performance, low combustion calorific value, easy to coke and carbon dep...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02
Inventor 夏翠珍李维芝李凌波黄欣江德恒柳永忠
Owner WEIMING BIO ENERGY CO LTD