초록 ▼

An apparatus and a control system for receiving the mud-like discharge from a liquid clarifying vessel and dewatering it into the form of slugs by vacuum means connected to the annular space surrounding a stand pipe connected to the discharge outlet. A timing and control system effects squeeze-out a

An apparatus and a control system for receiving the mud-like discharge from a liquid clarifying vessel and dewatering it into the form of slugs by vacuum means connected to the annular space surrounding a stand pipe connected to the discharge outlet. A timing and control system effects squeeze-out action and discharges the dewatered slugs from a flapper valve on a timed basis, as well as effecting periodic clean-out action.

대표청구항 ▼

In combination with an outlet at the bottom of a liquid clarifying vessel, a valve having one end connected to said outlet, a stand pipe connected to the other end of said valve, said stand pipe having perforated inner wall portions and having outer cylinder wall portions spaced from and surrounding

In combination with an outlet at the bottom of a liquid clarifying vessel, a valve having one end connected to said outlet, a stand pipe connected to the other end of said valve, said stand pipe having perforated inner wall portions and having outer cylinder wall portions spaced from and surrounding said stand pipe inner wall portions to provide annular air space means, said perforated portions are separated by a solid cylindrical wall so as to provide separate upper and lower annular air spaces, means for introducing air under pressure in said upper annular air space to effect squeezing out of liquid from the interior of said stand pipe, a shut-off discharge valve connected to the bottom of said stand pipe, and means for evacuating said annular air space means to dewater the contents of said stand pipe when said first mentioned valve and shut-off discharge valve are closed.