3results about How to "Increase the reflux ratio" patented technology

The utility model provides a peak regulation type device for preparing high-purity nitrogen through low-temperature rectification, which can provide a 30-120% load regulation working condition under the conditions of not reducing the nitrogen extraction rate and not increasing nitrogen emptying, is simple in load regulation working condition transformation, quick in response, stable in operation after working condition transformation, and capable of quickly responding to the change of nitrogen demand, and has a wide application prospect. The investment cost and the operation energy consumption are reduced. The main heat exchanger is connected with the first rectifying tower, the first rectifying tower is connected with the subcooler, and the subcooler is connected with the main condensation evaporator. The rectifying tower I is connected with the main condensing evaporator and the main heat exchanger; the main condensing evaporator is connected with the rectifying tower I, the rectifying tower II and the auxiliary condensing evaporator; the rectifying tower II is connected with the auxiliary condensation evaporator; the rectifying tower II is connected with the rectifying tower I; the auxiliary condensation evaporator is connected with the subcooler, and the subcooler is connected with the main heat exchanger; the rectifying tower II is connected with the liquid nitrogen subcooler; the liquid nitrogen subcooler is connected with the vacuum storage tank, and the vacuum storage tank is connected with the first rectifying tower.

This utility model discloses a high-efficiency denitrification wastewater treatment device based on A2O. The internal space of the tank is divided into an equipment room, an influent tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, and a filtration tank by a partition. The sedimentation tank is equipped with a sludge return device and is connected to the anaerobic tank through the sludge return device. A plug flow zone is located in the middle of the anoxic tank, and an air-lift plug flow device is installed in the plug flow zone, dividing the anoxic tank into a first anoxic section and a second anoxic section. A drainage hole is provided on the partition between the aerobic tank and the sedimentation tank. A return hole is opened on the partition near the anoxic tank at the output end of the aerobic tank, and the output end of the aerobic tank is connected to the first anoxic section through the return hole. The area of ​​the return hole is larger than the area of ​​the drainage hole. This utility model can reduce the impact of wastewater influent load, improve wastewater treatment capacity, and reduce energy consumption.

This invention discloses a reactor and method for cultivating denitrifying granular sludge. The reactor includes a denitrification stirred tank and an aerobic aeration tank. Pre-granulated seed sludge is added to both the denitrification stirred tank and the aerobic aeration tank. The denitrification stirred tank is equipped with a stirring device and has an inlet on its top side. The bottom of the denitrification stirred tank is connected to the bottom of the aerobic aeration tank via a sludge-water circulation pipe. The bottom of the aerobic aeration tank is connected to a sludge discharge pipe, and the top side has an outlet. An aeration device is located at the bottom of the aerobic aeration tank and is connected to an air pump. An air-lift sludge device is located above the aeration device. The air-lift sludge device includes an air collection hood and an upflow pipe connected to the center of the top of the air collection hood. The top of the upflow pipe is connected to the top of the denitrification stirred tank via an upper sludge-water circulation pipe. The reactor and method for cultivating denitrifying granular sludge of this invention create suitable environmental conditions for the rapid cultivation of denitrifying AGS in a continuous flow process.