Low depressurized system that divides of hot high score of suspension bed hydrogenation to temperature

The utility model provides a low depressurized system that divides of hot high score of suspension bed hydrogenation to temperature, include: suspension bed thermal high separator, the switching valve, the entry of switching valve pass through the pipeline with the liquid phase export of suspension bed thermal high separator lower extreme is connected, suspension bed temperature low pressure separator, two feed inlets of its lateral wall with be connected through return circuit decompression valves respectively between the export of switching valve, return circuit decompression valves is including the angle valve, first ball valve, relief pressure valve and the second ball valve that set gradually, the export of switching valve with between the entry of angle valve the export of angle valve with between the entry of first ball valve the export of first ball valve with between the entry of relief pressure valve the export of relief pressure valve with be connected through the pipeline respectively between the entry of second ball valve, the export of second ball valve is with corresponding the feed inlet is connected. The utility model discloses long period run can be realized, prior art's defect has been overcome.