50results about How to "Kill two birds with one stone" patented technology

The invention discloses an energy-saving acetic ester refining method. The method is characterized in that a pressure regulation valve is arranged at the top of a head oil tank; low-boiling point components in a system are intermittently discharged to a recovery system for treatment; a gas phase at the top of a fractionating tower is used for heating primary ester feed from an esterification tower or a washing tower to convert the primary ester feed into two parts, i.e. a gas phase and a liquid phase; the afterheat of steam is used for heating the liquid phase part of the primary ester feed subjected to primary heat exchange to gasify a part of the liquid phase; the gas phase and liquid phase of the primary ester feed enter different proper positions of the fractionating tower respectively; an oil phase of head oil which is subjected to phase separation is subjected to heat exchange with a finished product discharged from the bottom of the fractionating tower to be heated to temperature matched with the gas phase at the top of the fractionating tower, and enters an inlet in the upper part of the fractionating tower for refluxing. According to the method, low-boiling point impurities in the system can be released in time, the energy consumption of a refining process can be lowered, the energy consumption of a unit weight of product can be lowered by 5 to 20 percent, and the product obtained by the method is high in purity.

The invention provides a tandem multistage continuous rectification solvent recoverer, which comprises a high level metering tank, a first reboiler, a first rectifying tower, a first condenser, a vapour-liquid separator, a tail gas cooler, a second reboiler, a second rectifying tower, an inner separator, a reverse flow tube, a flow guide tube, a third rectifying tower, a second condenser, a rotorflow meter and a circulating pump. By the device, the problem of the limitation on a separation and recovery range of a solvent is solved. The tandem multistage continuous rectification solvent recoverer has a compact structure, low original cost, small occupied area, small occupied space and a small manual operation range, is easier to operate and has the greatest advantages that: on the basis of the prior art, the height of the rectifying tower is lowered and the solvent can be separated without an overhigh rectifying tower body; the tandem multistage continuous rectification solvent recoverer has higher purity than the conventional equipment; and the equipment can achieve an ideal separating effect on any separable organic solvents and the process requirement states can be achieved under the condition that the solvent does not flow back.