4results about How to "Continuous stable operation" patented technology

A kind of lithium carbonate preparation with screening structure, including support, the support is equipped with box, the top of box is equipped with screening frame, the bottom of box is equipped with unloading pipe, the top of screening frame is opened, the bottom of screening frame is equipped with multiple groups of screening port, first screen is equipped on screening port, one of first screen is equipped with discharge port, discharge port is connected with collection barrel by guide pipe, box is equipped with collection structure matched with screening frame.Using the above structure, through annular material pushing cooperation screening, not only can quickly separate solid-liquid, but also can rely on annular path to continue pushing material to avoid filter screen blockage, significantly improve screening efficiency;Lithium carbonate crystal particles continue to move automatically collected with pushing material, multiple filter material cooperation, greatly improve the efficiency of screening and collecting material;Device overall structure is simple and reasonable, operation is continuous and stable, and practicality is strong.

The invention relates to the technical field of organic chemical synthesis, in particular to a method and a system for efficiently synthesizing diphenyl carbonate. The method comprises the following steps: taking phenol and carbonic ester as raw materials, taking a multi-metal vanadium oxide compound as a catalyst, and reacting in a high-temperature reaction kettle with a mechanical stirring and condensation reflux device and a kettle bottom gas distributor; carbonic ester is continuously injected from the bottom of the high-temperature reaction kettle along with inert carrier gas, unreacted carbonic ester is refluxed through fractional condensation, and a byproduct alcohol is discharged along with the inert carrier gas; the carbonic ester is dimethyl carbonate or diethyl carbonate; the dosage of the catalyst is 0.5-5wt% of the mass of the phenol raw material According to the invention, through continuous feeding and specific condensation temperature control, selective condensation reflux of raw materials (carbonic ester) and selective removal of by-products (alcohols) are realized, reversible balance of ester exchange reaction is effectively broken, forward proceeding of the reaction is greatly promoted, and phenol conversion rate and reaction efficiency are significantly improved.

The invention relates to the field of chemical engineering, and discloses a separation and purification system and method for ethylene-ethane mixed gas, and the system comprises a plurality of adsorption towers, an adsorption pipeline, a plurality of pressure equalizing pipelines, a sequential discharge pipeline, a raw material gas pipeline, a desorption pipeline, a return pipeline and a tail gas boosting pipeline, the adsorption tower is connected with the adsorption pipeline, the pressure equalizing pipeline, the sequential discharge pipeline, the raw material gas pipeline, the desorption pipeline and the return pipeline through program control valves. According to the separation and purification method of the ethylene and ethane mixed gas, part of the product gas is adopted as the backflow gas for backflow, the product concentration and yield of ethylene are improved, the concentration of ethylene in the mixed gas can be improved to 89% or above only through a pressure swing adsorption operation unit, operation can be stably and continuously carried out, and intermittent starting and stopping are not needed.

This utility model provides a self-cutting flexible material unloading valve, including a valve body with an inlet at the upper end and an outlet at the lower end. A rotatable impeller is disposed within the valve body, and an upper cutter is positioned at the inlet. The upper cutter is installed in the same direction as the impeller's rotation, with its cutting edge facing opposite to the impeller's rotation direction. By positioning the upper cutter in the same direction as the impeller's rotation, and with its cutting edge facing opposite to the impeller's rotation direction, when the impeller moves the flexible material to the upper cutter, the flexible material is cut off by the upper cutter, thereby avoiding the problem of material entanglement on the impeller and significantly reducing the risk of blockage.