EXHAUST GAS PURIFICATION DEVICE

摘要

An exhaust gas purification device is disclosed. The exhaust gas purification device comprises a selective catalyst reduction (SCR) device for purifying exhaust gas; an urea solution storage tank for storing an urea solution; a venting line by which the urea solution storage tank is connected to the SCR device to supply ammonia gas (NH_3) generated in the urea solution storage tank to the SCR device; and a vent valve installed in the urea solution storage tank to discharge the ammonia gas (NH_3) from the urea solution storage tank. The present invention can fundamentally prevent the leakage of the ammonia gas (NH_3) by venting the ammonia gas (NH_3) generated in the urea solution storage tank to supply the ammonia gas to the SCR device.