7results 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 active extrusion dewatering device comprises a drying box, an electric heater, cross rods, hanging mechanisms, springs, a bidirectional pushing mechanism and an extrusion mechanism, the electric heater is installed in the drying box, the two cross rods are fixed to the top end of the interior of the drying box, and the hanging mechanisms are installed between the two cross rods in a sliding mode. The multiple hanging mechanisms are elastically connected through springs, each hanging mechanism comprises a hanging rod and two sliding blocks, each sliding block is installed on one transverse rod in a sliding mode, the hanging rod is fixedly connected between the two sliding blocks, and a two-way pushing mechanism used for pushing the multiple hanging mechanisms to move is installed at the top end of the interior of the drying box. And two extrusion mechanisms are mounted on the bidirectional pushing mechanism. According to the utility model, a plurality of dried beancurd stick skins are firstly pressed together to be extruded and dehydrated, and then the dried beancurd stick skins are automatically and separately heated and dried, so that the drying efficiency of the dried beancurd stick skins is higher.

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 invention belongs to the technical field of secondary aluminum refining, and particularly relates to a secondary aluminum refining method and device. The copper chloride is creatively used as the refining agent of the secondary aluminum, and the dispersion method, the adding speed and the adding amount of the copper oxide are limited, so that the copper chloride powder can be ensured to quickly and uniformly enter the secondary aluminum melt, the reaction is ensured to be quickly and efficiently carried out, and the optimal magnesium removal and impurity removal effects are further achieved. The molar ratio of Mg in the aluminum alloy melt to Cl in the added copper chloride is limited and controlled to be 1: (2-3), it is ensured that Mg, part of gas and non-metal impurities in the regenerated aluminum melt can be fully removed, meanwhile, it is ensured that the copper chloride magnesium removal refining agent reaches the high utilization rate, resource waste is avoided, and the production cost is reduced. And meanwhile, the introduction amount of the copper element in the secondary aluminum can be within a controllable range, so that the copper element is prevented from exceeding the standard.

The utility model relates to a converter flue gas dry dedusting system, which comprises an evaporative cooling flue, an evaporative cooler, an electrostatic precipitator, a fan and a diffusion chimney, the diffusion chimney comprises a cylindrical section and a conical section, a horizontal guide cylinder is arranged on the outer side of the lower part of the cylindrical section, and a first guide pipe and a second guide pipe are arranged in the guide cylinder; one end of the first flow guide pipe is arranged on the inner wall of the end, far away from the cylinder section, of the flow guide cylinder, and a gap is reserved between the other end of the first flow guide pipe and the inner wall of the end, close to the cylinder section, of the flow guide cylinder; two circular supporting net plates are arranged in the first flow guide pipe, two annular supporting net plates are arranged between the first flow guide pipe and the second flow guide pipe and between the second flow guide pipe and the flow guide cylinder, and first activated carbon is filled between the supporting net plates. The activated carbon dust removal mechanism is additionally arranged on the lower portion of the diffusion chimney to guarantee the overall dust removal quality, and the device is more practical.

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.