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How is the separation of gas-liquid-solid three-phase separators achieved?
- May 05, 2018 -

Due to the reasonable structure design of the gas-liquid-solid three-phase separator and its powerful functions, it can maintain stable working conditions in practical applications, reduce the workload of maintenance and management, and improve the separation accuracy. As an important part of anaerobic reactors such as EGSB and UASB, the gas-liquid-solid three-phase separator plays an important role in the normal operation of sludge blankets and obtaining good effluent quality.


In general, the gas-liquid-solid three-phase separator achieves two functions simultaneously during operation: one is to collect the biogas produced from the reaction chamber under the separator, and the other is to make the suspended material above the separator precipitate. Down.


To have such two functions, the gas-liquid-solid three-phase separator installed in the anaerobic reactor needs to meet the following conditions:

1. Before the solid-liquid mixture enters the sedimentation chamber of the gas-liquid-solid three-phase separator, the gas must be separated first.

2. Under normal conditions, the surface loading of the sedimentation zone of the gas-liquid-solid three-phase separator should be kept within a certain range. Before the mixed solution enters the sedimentation zone, the flow rate through the inflow channel is not greater than the settling velocity of the granular sludge. In addition, since the anaerobic sludge has a coagulating property, when the liquid flow rises through the mud layer, the sludge layer in the settler should be facilitated. The angle of the inclined wall of the sedimentation zone should be appropriate, so that the sludge deposited on the inclined bottom should not accumulate and slide back into the reaction zone as soon as possible.

3. During the operation of the gas-liquid-solid three-phase separator, large amounts of foam should be avoided in the gas chamber. At the same time pay attention to control the height of the air chamber to prevent scum from clogging the air pipe.


In general, in practical applications, when the gas, liquid, and solid mixture enters the interior of the gas-liquid-solid three-phase separator, the gas bubbles collide with the gas chamber and are effectively separated when they hit the reflector in the lower part of the separator. Discharge, separated from solid and liquid. After that, the sludge flocculates, settles, and concentrates in the sedimentation area. Because the density of water column above the sludge returning port is greater than the density of the liquid in the reactor, the concentrated sludge can be returned to the reaction zone to achieve solid-liquid separation.