System for relieving pressure rise of storage tank during low-temperature liquid ammonia unloading

Abstract

The utility model discloses a system for slowing down pressure rise of a storage tank during low-temperature liquid ammonia unloading, which comprises a low-temperature liquid ammonia tank, an unloading pipeline and a tank group boundary area ball valve, one end of the unloading pipeline is connected with a liquid ammonia unloading tank car, and a temperature detection unit is arranged in the liquid ammonia unloading tank car. The other end of the unloading pipeline is communicated with the interior of the low-temperature liquid ammonia tank, the low-temperature liquid ammonia tank comprises a storage tank outer tank and a storage tank inner tank, the tank group boundary ball valve is arranged on the unloading pipeline, and one end of the tank group boundary ball valve is connected with a first unloading branch pipe and a second unloading branch pipe in parallel; an adjusting valve is arranged on the first unloading branch pipe, the first unloading branch pipe is connected with a lower liquid inlet pipe extending out of the storage tank inner tank through a flange, and the outlet end of the lower liquid inlet pipe is close to the bottom of the storage tank inner tank; according to the system for relieving the pressure rise of the storage tank during low-temperature liquid ammonia unloading, different liquid inlet modes are adopted, so that the pressure rise in the low-temperature liquid ammonia tank can be relieved, and the unloading efficiency is greatly improved.