How does a sewage purifier purify water steps and internal structures?
Observation of boiling point and collection of distillate: before distilling, prepare at least two acceptance bottles. Because a liquid with a lower boiling point is boiled before it reaches the boiling point of the expected substance. This part of the distillate is called a "pre - cut" or "distilling head"". Before boiling, the temperature tends to be stable after steaming is a pure substance, then should be replaced with a clean dry bottles accept accept, write down this part of the liquid distillate and the last drop when the thermometer, which is the boiling fraction (boiling range). The general liquid more or less contain some impurities in high boiling point, need boiling, if we continue to increase the heating temperature, the thermometer will be significantly increased, if the heating temperature to maintain the original, there will be no distillate steam, the temperature suddenly dropped. At this point the distillation should cease. Even if the content of impurities is very small, do not steam dry, so as to avoid broken bottles and other accidents.
The process of purifying water by a sewage purifier is to filter and kill the virus after settling, as shown in the picture:
1, gravity sedimentation: sand basin (advection, vertical flow, swirl, aeration), sedimentation tank (advection, vertical flow, radial flow, Xie Liu); 2, coagulation and clarification; 3, buoyancy flotation: grease, flotation; 4, magnetic resistance interception, centrifugal separation, separation method
Feeding: carefully pour the distilled liquid through the glass funnel into the distilling bottle. Be careful not to leave the liquid out of the manifold. Add a few boiling things to the well thermometer. Check again that all parts of the instrument are connected properly and properly.Heating: when the pipe is cooled by water, the inlet of the condenser is slowly drawn into the cold water, and the water flows out from the top to the water tank, and then begins to heat. When heated, the liquid in the distilling bottle gradually boils and the vapor rises gradually. The reading of the thermometer also rose slightly. When the top of the vapor reaches the thermometer's mercury bulb, the thermometer reads up sharply. At this time should be appropriate that the small gas lamp flame or low voltage electric heating furnace or electric heating jacket, the heating speed is slightly slower, vapor top stay in place, so that the upper and the bottleneck thermometer heat, so the bulb on the droplet and the vapor temperature balance. Then add a little more flame to the distillation. Control the heating temperature and regulate the distillation rate, usually at 1~2 drops per second. In the whole distillation process, the mercury bulb on the thermometer must be condensed with droplets. The temperature at this point is the temperature at which the liquid is in equilibrium with the vapor, and the thermometer reads the boiling point of the liquid (distillate). Distillation too large heating flame can, otherwise it will cause overheating in the distillation of the neck of the bottle, so that a portion of the liquid vapor directly affected by the heat of the flame, so read the thermometer by boiling point is higher; on the other hand, distillation can not be too slow, or because the mercury thermometer is not ball distillate the liquid vapor infiltration to fully read the thermometer on the boiling point is low or irregular.
