Pumping device and system for jet stirring of ammonium nitrate solution

Abstract

The invention relates to pumping device and system for the jet stirring of an ammonium nitrate solution, which relate to stirring and pumping technologies of the ammonium nitrate solution. The pumping device is characterized in that a return tank is arranged beside a storage tank, and the top cover of the return tank is lower than the discharge opening of the storage tank; a submerged pump is installed on the top cover of the return tank, and the pump body of the submerged pump extends into the return tank and is then suspended in the inner cavity of the tank; the discharge pipe of the storage tank is connected with a discharge electrical ball valve in series, a static pressure type liquid level meter is arranged on the return tank, and a storage tank solution is controlled by a PLC (Programmable Logic Controller) control system to sequentially pass through the discharge pipe, the return tank, the submerged pump and a return pipe and is stirred through the spraying of a jet nozzle. The submerged pump is shut off in time delay by adopting the PLC control system after the electrical ball valve is turned off. The invention has the advantages that time delay control is adopted, so that when a jet stirring system is shut down, the discharge pipe and the return pipe are in an emptying state, no residual solution exists, and pipeline crystallization is prevented.

Description

Technical field: [0001] The invention relates to chemical solution stirring and pumping technology, in particular to the stirring and pumping technology of ammonium nitrate solution. Background technique: [0002] At present, ammonium nitrate solution (above 110°C), the raw material used in industrial explosives, is usually kept warm and stored in a large-volume storage tank for standby use. According to storage safety and process requirements, intermittent stirring must be carried out. Considering the characteristics of ammonium nitrate solution, such as high temperature, easy crystallization, and large storage tank size, it is difficult to realize the commonly used mechanical stirring device, and the jet stirring method can be used. [0003] The traditional jet mixing is composed of a working pump, return pipe, discharge pipe, jet nozzle and other parts to form a closed pipeline system. The liquid in the storage tank flows through the working pump from the discharge pipe, ...

AI Technical Summary

Problems solved by technology

[0004] Because the ammonium nitrate solution is easy to crystallize, if the ammonium nitrate solution is simply pumped out by the working pump, and then sent back to the storage tank through the pipeline for stirring, there will be the following problems: First, the working pump body and the pipeline entering and leaving the working pump are always full of nitric acid Ammonium solution, if the working pump stops working, especially after a long shutdown, these solutions will cool down and crystallize in the pump and pipeline

The second is that even

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