4results about How to "Fully remove" patented technology

This invention discloses a method for preparing sodium houttuynia cordata, comprising the following steps: adding sodium methoxide and toluene to a reaction vessel, heating, then slowly adding nonanone and ethyl formate, and after the addition is complete, reacting with a gradient cooling process, and post-processing to obtain an aqueous phase containing intermediate I; adding the aqueous phase containing intermediate I and toluene to the reaction vessel, stirring, cooling, and rapidly introducing liquid sulfur dioxide, continuously stirring and reacting at 0-10°C for 5-15 minutes, cooling, and filtering to obtain crude sodium houttuynia cordata. The preparation method of this invention directly introduces liquid sulfur dioxide during the sulfonation reaction, greatly shortening the process time, while achieving high product yield and purity, and requiring less sulfur dioxide. Furthermore, in the post-processing of sodium houttuynia cordata, adding toluene to the reaction solution beforehand can effectively transfer the generated impurities to the toluene; recrystallization using a 50 v / v% ethanol aqueous solution removes water-soluble and oil-soluble impurities while further reducing the risk of fire and explosion during centrifuge operation.

The utility model discloses a kind of self-cleaning dewatering devices for corrugated paper, it includes: dewatering device main body, the outer surface of dewatering device main body is fixedly connected with hydraulic pressure rod, the output end of hydraulic pressure rod is fixedly connected with sliding frame, one end of sliding frame is fixedly connected with dewatering frame one, the inner wall of dewatering device main body is fixedly connected with dewatering frame two, dewatering frame two includes motor, the output end of motor is fixedly connected with rotating rod one, by being provided with two dehydration rollers located in upper and lower respectively, can be twice extrusion dewatering to corrugated paper, more fully remove water in paper, improve dewatering effect;The middle of dehydration roller is provided with cleaning roller, can clean two dehydration rollers, reduce sundries on dehydration roller;By a cleaning roller and two dehydration rollers inside dewatering frame two are all driven by a motor, without driving system for each roller alone, reduce energy consumption.

This invention provides a method and system for purifying a cyclic ester stream. The method includes the step of continuously evaporating a solution stream containing cyclic esters, thereby converting all or part of the cyclic esters into a solid state. Specifically, it includes the following steps: (a) introducing the solution stream containing cyclic esters into a continuous evaporation concentration unit, thereby converting all or part of the cyclic esters into a solid state, to obtain a gaseous solvent and a stream A containing purified solid cyclic esters; (b) introducing the stream A containing purified solid cyclic esters obtained in step (a) into a particle size control unit, to obtain a stream B containing purified solid cyclic esters; optionally, (c) introducing the stream B containing purified solid cyclic esters obtained in step (b) into a solid-liquid separation unit, to obtain a filtrate and a stream C containing purified solid cyclic esters; (d) drying the stream B containing purified solid cyclic esters obtained in step (b) or the stream C containing purified solid cyclic esters obtained in step (c), to obtain dried glycolide particles. This invention solves the technical problems of high difficulty in particle size control, insufficient chemical purity of the product, and inability to operate continuously in existing glycolide purification technologies.

The clothes treatment equipment comprises a base assembly, a heat pump system, an auxiliary heating part and an air supply part, the base assembly is provided with an inner circulation drying channel and a fresh air flow channel, and air flow in the inner circulation drying channel can exchange heat with air flow in the fresh air flow channel; the heat pump system comprises an evaporator component, a condenser component and a compressor component which are arranged on the base assembly and form refrigerant circulation, the evaporator component and the condenser component are arranged in the inner circulation drying tunnel at intervals, and the auxiliary heating component is arranged on the base assembly, located in the inner circulation drying tunnel and used for heating the compressor component in the air flow direction in the inner circulation drying tunnel. The auxiliary heating component is located on the downstream side of the evaporator component. The air supply piece is used for driving external fresh air to flow along the extending path of the fresh air flow channel. According to the technical scheme, on the premise that efficient drying of the heat pump circulating system is guaranteed, it can be guaranteed that drying heat energy is kept balanced all the time.