The present invention is installed in the auto drain system of the scrubber device to install and drain the water discharged through the exhaust line by installing a water collector at the exhaust end of the scrubber (scrubber) The present invention relates to a reactor for manufacturing a device by reaction of toxic gas, a scrubber chamber for neutralizing toxic gas sucked from the reactor, and vaporized and overflowed water introduced together with toxic gas discharged from the scrubber chamber. A scrubber device including a demister to be removed, a plurality of lines installed so that the reactor, the scrubber chamber and the demister are in communication with each other, and are attached to an outlet line end of the demister, and are introduced through the demister. A water collector for collecting vaporized and overflowed water introduced with the gas, and installed in the scrubber chamber , Including a control system for controlling such that the water is accumulated in the drain water collector it is characterized in that configured.
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