38results about How to "Avoid coke clogging" patented technology

The prevent invention discloses a combustion chamber thermal protection wall structure utilizing fuel automatic suction transpiration cooling. The combustion chamber thermal protection wall structurecomprises a high-temperature resistant outer wall layer, a foam layer and a porous layer which are sequentially arranged from outside to inside, wherein one side of the foam layer is provided with a fuel inlet that is connected to an external oil tank through a fuel pipeline. According to the invention, capillary force of the fuel in a porous structure is used as the driving force to realize fuelautomatic suction transpiration cooling; liquid fuel is used as a coolant, and the boiling point of the fuel is higher than that of water and lower than a coking temperature, thus avoiding coking blockage in the porous layer; the fuel performs convection heat exchange and is vaporized in the porous layer, thus a large amount of heat is absorbed, and the temperature of the wall of a combustion chamber is reduced; and the fuel after heat exchange can penetrate into the interior of the combustion chamber from the porous layer to participate in combustion and provide power, and after phase changevaporization, fuel oil vapor can form a film boundary layer on the inner surface of the thermal protection wall structure to block the heat transfer from a high-speed and high-temperature mainstream to the wall of the combustion chamber, so that the cooling effect is efficient and stable, and the applicability is high.

An industrial production method for separating boron isotope products based on a methyl ether-boron trifluoride complex belongs to the technical field of isotope separation. It is mainly invented to solve the problems of serious vacuum belting in the chemical reaction exchange distillation method of methyl ether-boron trifluoride complex. Firstly, the methyl ether-boron trifluoride complex is stripped and dried, and the methyl ether-boron trifluoride complex from the stripping column is continuously added to the first exchange distillation column, and continuously extracted The liquid in the tank of the previous exchange distillation column is added to the top of the next column, and the steam at the top of the latter column continuously enters the tank of the previous column after being condensed; under reduced pressure heating and rectification, the boron trifluoride gas And the methyl ether gas enters the shell side of the condenser and the trap, the coolant goes through the tube side of the condenser and the trap, and the -60°C methyl ether solution is pumped to the sprayer, and the boron trifluoride gas Spraying is performed to convert boron trifluoride gas and methyl ether gas into methyl ether-boron trifluoride complex. The advantage is that it can solve the problem of vacuum belting.