The invention discloses non-leaded aviation piston engine fuel as well as a preparation method and device thereof, belonging to the technical field of aviation fuel. The non-leaded aviation piston engine fuel is prepared from the following ingredients in percentage by volume: 28-45% of 2,2,4-trimethylpentane, 13-40% of 2,2,3-triptane, 20-33% of arene and 7-13% of alkane. The preparation method comprises the following steps: feeding various ingredients according to a sequence of density from large to small, fully stirring and mixing. The preparation device comprises an extraction device and a stirring and mixing device, wherein the extraction device is internally provided with an upper-segment packed bed layer and a lower-segment packed bed layer, a liquid collecting and distributing deviceis arranged between the upper-segment packed bed layer and the lower-segment packed bed layer, the liquid collecting and distributing device comprises a collecting part and a distributing part, the distributing part is installed on the collecting part, and the height of the distributing part is lower than that of the collecting part. According to the technical scheme of the invention, the maintenance cost of an engine and environmental pollution are reduced.

Non-leaded aviation piston engine fuel as well as preparation method and device thereof

The invention discloses a method and a system for extracting special solvent oil from stable light dydrocarbon and belongs to the technical field of oil refining and chemical engineering. The method comprises the following steps: feeding a raw material, namely stable light dydrocarbon into a de-heavy fractionator so as to obtain light component oil and heavy aromatics; feeding the light componentoil into a light component removal tower so as to obtain a byproduct, namely the stable light dydrocarbon and a C6-C7 component; feeding the C6-C7 component into a hexane removal tower so as to obtainhexane oil and heptane oil; feeding the hexane oil into a hexane oil separation tower so as to obtain isohexane and n-hexane; feeding the heptane oil into a heptane oil separation tower so as to obtain isoheptane and n-heptane. The system comprises the de-heavy fractionators, the light component removal tower, the hexane removal tower, the hexane oil separation tower and the heptanes oil separation tower. By adopting the technical scheme of the embodiment of the invention, efficient utilization of the stable light dydrocarbon is achieved, the largest benefits can be made with limited resources, economic benefits of companies are increased, and meanwhile market requirements can be met.

Method and system for extracting special solvent oil from stable light dydrocarbon

The invention relates to a method for improving quality of a vacuum fifth line product of a lubricating oil type vacuum separator tower, and a novel separator tower is introduced in a conventional lubricating oil type vacuum tower. A lower right angle separator is adopted, one side of the vertical section of the separator is used for feeding, the other side of the vertical section of the separatoris used for discharging, the horizontal section of the discharge side of the separator is connected with a tower wall by welding, and the separator tower is divided into three working sections, respectively comprising a pre-fractionation section, a common rectification section and a vacuum fifth line collection section. Normal bottom residue oil to be separated is heated by a heating furnace, enters from the middle of the pre-fractionation section, and is stripped by tower bottom steam, after the stripping, a liquid phase as vacuum residue oil is discharged from the bottom of the tower, a gasphase is sent to the common rectification section, and further separated by a side stripping tower to obtain product diesel and vacuum second line, vacuum third line and vacuum fourth lubricating oil. A stream of steam is introduced in the lower part of a vacuum fifth-line collecting section for stripping, and the vacuum fifth-line lubricating oil product is collected at the bottom. Under the premise of no increasing of the energy consumption of a vacuum furnace, the distillation range of the vacuum fifth-line lubricating oil product and overlapping degree with adjacent products are significantly reduced, and the method is used in the design of a new tower, also in the technical transformation of an old tower.

Method for improving quality of vacuum fifth line product of lubricating oil type vacuum separator tower

The invention relates to a liquid distributor with a mass transfer function The structure of the distributor includes a collection plate, CTST cover hoods, gas rising holes, liquid distribution holes, liquid guide pipes and liquid baffles; the collection plate is provided with the parallel rectangular gas rising holes, the long sides of the gas rising holes are welded with the vertical liquid baffles, the CTST cover hoods are arranged on the gas rising holes, the CTST cover hoods are rectangular tubular structures, the long sides of the rectangles are provided with two jet plates, the short sides of the rectangles are provided with two end plates, the lower parts of the end plates are welded on the short side edges of the gas rising holes, and the upper parts of the end plates are welded with separation plates; the distance from the upper parts of the jet plates to the top of the end plates is 30-50mm, the distance from the lower parts of the jet plates to the collection plate is 5-20mm; the liquid distribution holes are distributed on the collection plate, and one liquid guide pipe is welded just below each liquid distribution hole The liquid distributor eliminates the problems existing in traditional distributors; can play the role of gas and liquid collection and distribution, and also has the effects of mass transfer, and the effective space of a tower is comprehensively utilized

Liquid distributor with mass transfer function

The invention relates to a method for coproducing ethyl acetate and n-butyl acetate by a reactive distillation dividing wall column. The method adopts a reactive distillation dividing wall column, the raw material ethanol is fed from the bottom of the reaction section, and the raw materials n-butanol and acetic acid are fed from the middle part of the reaction section; and the two reactions are arranged in one reaction region, so the n-butyl acetate can be used as an azeotrope former for producing water in the ethyl acetate preparation process when being used for preparing ethyl acetate-n-butyl acetate, thereby reducing the reflux quantity of the column top ethyl acetate, enhancing the reaction conversion rate, lowering the contents of ethanol and water in the column top ester phase, and lowering the energy consumption in the production process. The method can reduce the amounts of the condensers and reboilers and enhance the thermodynamic efficiency, thereby lowering the energy consumption of distillation, implementing deep energy conservation and bringing in favorable economic benefits.

Method for coproducing ethyl acetate and n-butyl acetate by reactive distillation dividing wall column

The invention relates to a separation plate tower capable of controlling a gas-phase distribution ratio and used for separating a four-component mixture. The separation plate tower comprises a public rectification section and a public stripping section, wherein the public rectification section is located at a tower top and the tower top is connected with a first condenser; the public stripping section is located at a tower bottom and the tower bottom is connected with a first reboiler; the separation plate tower is characterized in that the public rectification section and the public stripping section are divided into three regions along the tower diameter direction through a first separation plate, a second separation plate and a third separation plate, and the three regions comprise a pre-fractionation column section, a main tower section I and a main tower section II; the pre-fractionation column section is formed by surrounding of the first separation plate, the third separation plate and the outer wall of the separation plate tower and is provided with a feeding hole; the main tower section I is formed by surrounding of the second separation plate, the third separation plate and the outer wall of the separation plate tower; the main tower section I is sealed by the tower bottom and is connected with a second reboiler; the main tower section II is formed by surrounding of the first separation plate, the second separation plate and the outer wall of the separation plate tower; the main tower section II is sealed by the tower top and is connected with a second condenser.

Separation plate tower capable of controlling gas-phase distribution ratio and used for separating four-component mixture

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Liquid distributor with mass transfer function

Method for coproducing ethyl acetate and n-butyl acetate by reactive distillation dividing wall column

Separation plate tower capable of controlling gas-phase distribution ratio and used for separating four-component mixture