A kind of waste lubricating oil hydrogenation regeneration pretreatment method
A hydrogenation and regeneration technology for waste lubricating oil, which is applied in the fields of hydrogenation treatment process, hydrocarbon oil treatment products, hydrocarbon oil treatment, etc., which can solve the problems of short production cycle, high operation cost, easy deactivation of catalyst, etc.
Active Publication Date: 2022-01-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
Considering product quality and processing environmental protection requirements, the hydrogenation process is the mainstream technology for the regeneration of waste lubricating oil. The current problems encountered in the hydrogenation regeneration technology of waste lubricating oil are: the heating furnace is prone to coke, the impurity removal depth of the hydrogenation feed is not enough, and the catalyst Easy to deactivate, easy to block the bed, short production cycle and high operating cost
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[0013] The present invention will be described in detail below in combination with specific embodiments.
[0014] The steps of the present invention are as follows:
[0015] (1) The waste lubricating oil is first settled in a settling tank to remove most of the water and large particles of mechanical impurities, and then filtered through a filter to remove small particles of mechanical impurities. 1. The hydrogen supply fraction is mixed, the mixture enters the heating furnace for heating, and the material at the outlet of the heating furnace enters the hydrogen supply reactor for reaction, or it can also be mixed with the material from the outlet of the heating furnace in whole or in part and enters the hydrogen supply reactor for reaction;
[0016] The operating conditions of the hydrogen supply reactor are reaction pressure: 5~15MPa, reaction temperature 300~420℃, space velocity 0.2~2.0hr -1 .
[0017] (2) The reaction materials coming out from the top of the hydrogen sup...
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The invention discloses a hydrogenation and regeneration pretreatment method of waste lubricating oil. The waste lubricating oil is first settled in a settling tank to remove most of the water and large-particle mechanical impurities, and then filtered through a filter to remove small-particle mechanical impurities. Dehydration and removal of mechanical impurities waste lubricating oil can be fully or partially mixed with hydrogen and hydrogen supply fraction, the mixture enters the heating furnace for heating, and the material at the outlet of the heating furnace enters the hydrogen supply reactor near hydrogen for reaction; the reaction from the top of the hydrogen supply reactor The material is separated by hot high fraction, cold high fraction, cold low fraction, flash tower, and vacuum fractionation tower, and is separated into hydrogen, light hydrocarbons, heavy oil at the bottom of the tower, hydrogen-supplying fraction and raw materials for subsequent hydrotreating. The beneficial effect of the present invention is that it can prevent coking of the waste lubricating oil pretreatment heating furnace, and the non-ideal components of the waste lubricating oil hydrogenation regeneration are more thoroughly destroyed, and the waste lubricating oil hydrogenation refining raw material can be obtained, which greatly prolongs the waste lubricating oil hydrogenation regeneration Device production cycle.
Description
technical field [0001] The invention belongs to the technical field of regeneration of waste lubricating oil, and relates to a hydrogenation regeneration pretreatment method of waste lubricating oil. Background technique [0002] With the increase in the degree of mechanization and the increase in people's travel needs and many other factors, the use of various lubricating oils is increasing. Due to the low loss of lubricating oil, a large amount of waste lubricating oil is produced. Resource recovery and environmental protection are the actual needs of recycling waste lubricating oil. The waste lubricating oil regeneration process began in 1935 and has experienced the development from sulfuric acid clay to acid-free process. According to the deterioration mechanism and degree of deterioration of lubricating oil, waste lubricating oil regeneration technology can be divided into repurification, re-refining and re-refining. Repurification refers to the method of removing impu...
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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1007C10G2400/10C10G2300/201
Inventor 沐宝泉张淑霞乐慧
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)