Water storage device and exhaust gas treatment system

An exhaust gas treatment system, comprising:

• at least one water storage device;
• and
• an exhaust gas reaction chamber, wherein the exhaust gas reaction chamber is communicated with the water storage device, the water storage device is configured to store a solution for flushing a processing by-product in the exhaust gas reaction chamber, and the solution is recyclable,
• wherein the water storage device comprises:
• a water storage cavity and a water inlet, wherein the water inlet is configured to feed the solution into the water storage cavity, the water storage cavity is configured to store or discharge the solution, and the water storage cavity contains a viscous substance;
• a guide rod and a floating device movable along the guide rod, wherein the floating device is movable as a water level in the water storage cavity changes, and the viscous substance between the guide rod and the floating device restrains movement of the floating device;
• and
• a water curtain casing, wherein the water curtain casing is communicated with the water inlet, the water curtain casing is configured to split a part of the solution from the solution fed from the water inlet, and the solution split by the water curtain casing is configured to flush the viscous substance between the guide rod and the floating device.