Abstract: A method for preparing bio-active particles by spray drying, liquid nitrogen quick-freezing, and vacuum freeze drying includes the following steps: transporting a feed liquid into a preheated spray tower, wherein the feed liquid forms liquid droplets after being atomized by an atomizer in the spray tower, dispersing air is introduced into a top of the spray tower, and the dispersing air disperses the atomized liquid droplets; introducing hot air into the top of the spray tower, wherein the liquid droplets are partially formed into dry-like particles after being dried by the hot air, the surface dried particles fall, through a bottom of the spray tower, into a cooling pool arranged under the spray tower, and the particles, after being frozen, are transferred to a freeze drying device for freeze drying.

Abstract: The invention discloses a bionic human esophagus and stomach digestive system including a bionic stomach assembly and a bionic esophagus assembly. The bionic stomach assembly includes a bionic stomach including a stomach body provided with a pylorus and a cardia, a rolling compression apparatus disposed outside the stomach body for performing rolling compression on the bionic stomach, and a gastric juice tube in fluid communication with the stomach body. The bionic esophagus assembly includes a bionic esophagus in fluid communication with the cardia, a first and second esophagus clamp which are respectively clamped at two ends of the bionic esophagus for controlling the esophagus to be opened or closed, and a vibrator disposed between the first and second esophagus clamps for driving the bionic esophagus to vibrate. In the application, the bionic stomach and esophagus are subject to mechanical compression and vibration, thereby simulating a real stomach digestive system.

Abstract: The invention discloses a double-tank oxidation pond for evaluating catalytic ozonation efficiency, comprising detachable tank bodies made of organic glass, movable ozone aeration pipes and sampling holes. Each tank body has three sections. The height of ozone aeration tube and the number of the holes can be adjusted. The holes are distributed at different positions of the tank bodies for real-time in-situ sampling. It is easy to observe the distribution profile of the gas, liquid and solid phases in the tank bodies. The square double-tank structure is similar to actual production process, and thus the experimental data is easy for computer simulation to enlarge to the actual production process. The size of the ozone aeration pipe and the position of holes in the tank can be adjusted to evaluate the catalytic ozonation effect of sewage treated by different aeration ways and aeration heights.

Abstract: The invention discloses a bionic human esophagus and stomach digestive system including a bionic stomach assembly and a bionic esophagus assembly. The bionic stomach assembly includes a bionic stomach including a stomach body provided with a pylorus and a cardia, a rolling compression apparatus disposed outside the stomach body for performing rolling compression on the bionic stomach, and a gastric juice tube in fluid communication with the stomach body. The bionic esophagus assembly includes a bionic esophagus in fluid communication with the cardia, a first and second esophagus clamp which are respectively clamped at two ends of the bionic esophagus for controlling the esophagus to be opened or closed, and a vibrator disposed between the first and second esophagus clamps for driving the bionic esophagus to vibrate. In the application, the bionic stomach and esophagus are subject to mechanical compression and vibration, thereby simulating a real stomach digestive system.

Abstract: The invention discloses a double-tank oxidation pond for evaluating catalytic ozonation efficiency, comprising detachable tank bodies made of organic glass, movable ozone aeration pipes and sampling holes. Each tank body has three sections. The height of ozone aeration tube and the number of the holes can be adjusted. The holes are distributed at different positions of the tank bodies for real-time in-situ sampling. It is easy to observe the distribution profile of the gas, liquid and solid phases in the tank bodies. The square double-tank structure is similar to actual production process, and thus the experimental data is easy for computer simulation to enlarge to the actual production process. The size of the ozone aeration pipe and the position of holes in the tank can be adjusted to evaluate the catalytic ozonation effect of sewage treated by different aeration ways and aeration heights.

Abstract: A freezing temperature controllable spray freezing tower for preparing micron-sized spherical ice particles includes a tower body, an atomization system, a material feeding system, a circulatory air supplying system, a refrigeration system and a tower wall cooling and thermal insulation system. An air storage cavity is formed at a top of the tower body, a freezing chamber is formed inside the tower body, a material collecting chamber is formed at a bottom of the tower body. The atomization system is in communication with the air storage cavity, the material feeding system is in communication with the atomization system, the circulatory air supplying system is in communication with the bottom of the freezing chamber and the refrigeration system respectively, the refrigeration system is connected to the air storage cavity and a tower wall of the tower body. Thus the operation is convenient and simple.

Abstract: A double-sealing type apparatus for collecting spray freeze ice ball particles and a collecting method for the double-sealing type apparatus are provided. The double-sealing type apparatus includes a collector, a collecting trolley, a vacuum pumping device, a heating device, a first sealing pad and a second sealing pad. The collector is arranged on the collecting trolley, and is provided with a collecting port. The collecting port corresponds to a discharging port at the bottom of a freezing tower. A water inlet is further provided at the collecting port, and the water inlet is in communication with a space formed by the aligning of the collecting port and the discharging port. Good sealing performance is achieved in a double-sealing manner including the sealing pads and the ice sealing, so as to smoothly transfer ice balls in the freezing tower.

Abstract: A freezing temperature controllable spray freezing tower for preparing micron-sized spherical ice particles includes a tower body, an atomization system, a material feeding system, a circulatory air supplying system, a refrigeration system and a tower wall cooling and thermal insulation system. An air storage cavity is formed at a top of the tower body, a freezing chamber is formed inside the tower body, a material collecting chamber is formed at a bottom of the tower body. The atomization system is in communication with the air storage cavity, the material feeding system is in communication with the atomization system, the circulatory air supplying system is in communication with the bottom of the freezing chamber and the refrigeration system respectively, the refrigeration system is connected to the air storage cavity and a tower wall of the tower body. Thus the operation is convenient and simple.

Abstract: A double-sealing type apparatus for collecting spray freeze ice ball particles and a collecting method for the double-sealing type apparatus are provided. The double-sealing type apparatus includes a collector, a collecting trolley, a vacuum pumping device, a heating device, a first sealing pad and a second sealing pad. The collector is arranged on the collecting trolley, and is provided with a collecting port. The collecting port corresponds to a discharging port at the bottom of a freezing tower. A water inlet is further provided at the collecting port, and the water inlet is in communication with a space formed by the aligning of the collecting port and the discharging port. Good sealing performance is achieved in a double-sealing manner including the sealing pads and the ice sealing, so as to smoothly transfer ice balls in the freezing tower.