초록 ▼

A buffer tank and pre-wetting apparatus prevent a liquid chemical waste from crystalizing on the inside walls of a drain pipe that carries the waste to a waste tank. The pre-wetting apparatus includes a pre-wetting tank with an overflow pipe that leads to the waste tank drain pipe. A water supply is

A buffer tank and pre-wetting apparatus prevent a liquid chemical waste from crystalizing on the inside walls of a drain pipe that carries the waste to a waste tank. The pre-wetting apparatus includes a pre-wetting tank with an overflow pipe that leads to the waste tank drain pipe. A water supply is connected to fill the pre-wetting tank to the rim of the overflow pipe and then overflow to wet the inside walls of the drain pipe before waste from the buffer tank is transferred through the overflow pipe and to the drain pipe and the waste tank.

대표청구항 ▼

[ We claim:] [10.] A process for handling a liquid chemical waste comprising the following steps,providing a buffer tank for initially receiving the waste, the buffer tank having an outlet and having a first valve for controlling the flow of liquid waste from the outlet of the buffer tank,providing

[ We claim:] [10.] A process for handling a liquid chemical waste comprising the following steps,providing a buffer tank for initially receiving the waste, the buffer tank having an outlet and having a first valve for controlling the flow of liquid waste from the outlet of the buffer tank,providing a waste tank for thereafter receiving the liquid waste and a drain pipe for transferring the liquid to the waste tank,providing a pre-wetting tank connected to receive the liquid chemical waste from the buffer tank when the first valve is open, the pre-wetting tank having an overflow pipe leading to the waste tank,providing a connection including a second valve for supplying water to the pre-wetting tank to pre-wet the tank,detecting a high level and a low level of liquid chemical waste in the buffer tank,operating the second valve when the liquid waste reaches the high level in the buffer tank to flow a predetermined amount of water into the pre-wetting tank to overflow the overflow pipe and thereby flow water down the inside walls of the drain pipe to pre-wet the inside walls of the drain pipe,and thereafter operating the first valve for transferring the liquid waste in the buffer tank through the pre-wetted drain pipe to the waste tank.