49results about How to "Production to prevent" patented technology

The invention relates to a new clean production technique of lactic acid; the concrete steps of the technique comprise: firstly, saccharification solution made from substances containing sugar is added with nutritious substances and lactobacillus for fermentation; then a porous membrane is used for fining fermentation solution, and the lactobacillus in the solution is retained and returned to a fermentation unit for reuse; nanofiltration is adopted to carry out discoloration and purification to the penetrate solution of the porous membrane, and concentrated solution after nanofiltration is returned to the fermentation unit after being processed by a ceramic membrane sterilization system; the penetrate solution after nanofiltration enters a bipolar membrane electrodialysis system for preparing the lactic acid and liquid caustic produced simultaneously is returned for use; and finally, vacuum distillation is adopted to concentrate lactic acid solution, thus obtaining the lactic acid which is a finished product. The production technique is characterized by little pollution and low material consumption, realizes bacteria recycling fermentation, saves inoculation quantity, lowers fermentation cost as well as greatly reduces fermentation water consumption and improves the quality of lactic acid products.

The invention discloses a pouring gate flow control device for preventing a rotational flow from generating in a continuous casting tundish and belongs to the technical field of tundish pouring gate flow control devices. The pouring gate flow control device for preventing the rotational flow from generating in the continuous casting tundish comprises a liquid discharge pipe, a liquid inlet plate, flow guide holes, a flow control stopper rod and a lift mechanism. The liquid discharge pipe penetrates through the bottom of the tundish and extends into the inner portion of the tundish. The liquid discharge pipe is hollow. One end portion of the liquid discharge pipe, extending into the tundish, is fixedly connected with the liquid inlet plate. The top and the side faces of the liquid inlet plate are respectively sealed. One or more flow guide holes are formed in the bottom face of the liquid inlet plate. An opening of each flow guide hole is downward. Each flow guide hole is communicated with a hollow portion in the liquid discharge pipe. The flow control stopper rod is arranged right below the flow guide holes. The outer diameter of the flow control stopper rod is matched with the inner diameter of the corresponding flow guide hole. The flow control stopper rod is vertically arranged and fixed on the bottom of the tundish. The lift mechanism is arranged at one end, located outside the tundish, of the liquid discharge pipe and controls lift of the liquid discharge pipe and the liquid inlet plate. The pouring gate flow control device for preventing the rotational flow from generating in the continuous casting tundish can effectively prevent the rotational flow from generating and improve purity of liquid steel.

The invention discloses a high-temperature air atomization and shock cooling system and a method. High-temperature air flows to the top of a cooling tower from the bottom of the cooling tower by an air guide device; a temperature detection device and a flow detection device are arranged at the bottom of the cooling tower; cooling water is sprayed in from the periphery of the upper part in the cooling tower, the atomization is performed for absorbing heat, and the high-temperature air is cooled; the amount of the cooling water required by the atomization for cooling is calculated by using a PLC (Programmable Logic Controller) control system; the high-temperature air is subjected to shock cooling to a preset temperature, the sprayed water is changed to steam which is pumped out from the top end after cooling; another temperature detection device and another flow detection device are arranged at the top of the cooling tower and can be used for feeding back to the PLC control system so as to realize the automatic fine water amount adjusting. The system has the characteristics that the high-temperature air can be subjected to the shock cooling, and the fast cooling aim can be realized by water atomization for the cooling, so that a certain temperature region can be fast crossed, the cooling can be realized with a short flow, the occupying area is small, the secondary pollution is avoided and the like.

The invention discloses a bottle catching mechanical hand for use in the detection of visible foreign matters in bottled liquid medicaments, which comprises a guide roller and directional part and a rotating part, wherein the guide roller and directional part and the rotating part are sequentially arranged from top down; the guide roller and directional part comprises a guide roller, a directional roller, a directional and dynamic balance weight; the upper end of the guide roller is provided with a positioning end gasket; the side wall of the guide roller is provided with the directional and dynamic balance weight and the directional roller; the rotating part comprises a rotating arm and a clamping part; the upper end of the rotating arm is connected with the guide roller and the lower end of the rotating arm is connected with the clamping part; the clamping part comprises a clamping roller, a dynamic arm, a static arm and a clamping arm power part; the dynamic arm is connected with the clamping arm power part through a clamping arm shaft; and the rotating part is connected with the positioning part through the rotating arm and the guide roller and rotates around the positioning part. The mechanical hand is suitable to be used in the detection of the visible foreign matters in existing small-volume bottled liquid medicaments, has the advantages of simple structure, good detection effect, safety, reliability and the like and has a wide application range.