Cooling water circulating system of vacuum thermal treatment furnace

The utility model provides a cooling water circulating system of a vacuum thermal treatment furnace. The cooling water circulating system comprises a vacuum thermal treatment furnace cooling system, a circulating water tank system and a descaling agent circulating system which are connected in parallel, wherein the vacuum thermal treatment furnace cooling system comprises a first cooling chamber, and a first water inlet pipeline and a first water outlet pipeline communicated with the first cooling chamber; the circulating water tank system comprises a circulating water tank, and a second water inlet pipeline and a second water outlet pipeline communicated with the circulating water tank; the descaling agent circulating system comprises a descaling agent circulating pump, and a third water inlet pipeline and a third water outlet pipeline communicated with the descaling agent circulating pump; the third water inlet pipeline is communicated with the third water outlet pipeline through an internal circulating pipeline; a discharge pipeline is arranged on the internal circulating pipeline; a control valve is arranged on each pipeline. Compared with the prior art, the cooling water circulating system for the vacuum thermal treatment furnace can realize automatic descaling, and is low in cost and convenient to operate.