Improved vacuum overhead noncondensable gas recycling system of crude oil distillation device

The utility model relates to the technical field of mechanical recycling and in particular relates to an improved vacuum overhead noncondensable gas recycling system of a crude oil distillation device. The improved vacuum overhead noncondensable gas recycling system comprises a vacuum overhead gas-water sealing tank, a vacuum overhead gas desulfurization tower, a vacuum overhead gas liquid-separating tank and a vacuum furnace. The improved vacuum overhead noncondensable gas recycling system is characterized in that a liquid inlet of the vacuum overhead gas-water sealing tank is connected with a sewage outlet of the crude oil distillation device; a liquid inlet of the vacuum overhead gas-water sealing tank is connected with an inlet of a sulfur-containing sewage device; a gas inlet of the vacuum overhead gas-water sealing tank is connected with a gas outlet of the crude oil distillation device; and a gas outlet of the vacuum overhead gas-water sealing tank is connected with a gas inlet of the vacuum overhead d