Mother-child tankThe liquid nitrogen composite container includes a sub-tank, piping system, interlayer, main tank, measurement and control system, safety accessories, and external operation platform. The liquid nitrogen composite container is painted on the outside and installed on a foundation platform. The mother-child tank is used for liquid nitrogen storage and supply, employing a pressure extrusion method for easy and reliable external liquid discharge operations. Pressurized storage reduces emission losses during the storage period, and manufacturing and installation are easier than spherical tanks, resulting in lower manufacturing and installation costs. Therefore, it has higher safety, stability, and controllability. Now, let's learn about the technical implementation method of the mother-child tank!

　　Mother-child tankThe combination container type refers to an internal tank composed of multiple sub-tanks (more than three) in parallel to meet the requirements for large-capacity storage at low-temperature liquid storage stations. Multiple sub-tanks are assembled side by side on the main tank. Its advantages are: no need for liquid pumps for discharge, using a squeezing method for external discharge, easy and reliable operation, pressurized storage reduces emission losses during the storage period, manufacturing and installation are easier than spherical tanks, and manufacturing and installation costs are low. If this form is used for liquid nitrogen supply containers, it can provide large liquid nitrogen storage supply equipment with higher economic efficiency, stability, and controllability. However, there are major design issues in the current design.

1) Design of the interlayer insulation form of large low-temperature containers and the pearl interlayer filling method;

2) Generally set a single safety accessory, safety valve lagging, and rupture disc for one-time use, which is difficult to meet safety requirements.

3) Design of the main tank body structure;

4) All liquid phase outlet external tank piping and joint forms;

5) How to improve the convenience of sub-tank operation;

6) For sub-tank liquid delivery, how to avoid excessive local temperature difference stress during filling;

7) Complete main engine system design.

8) For large low-temperature containers, structural design to reduce cold loss;

9) Comprehensive design for small flow and large flow filling.

New content of the practical mother-child tank.

This practical new type addresses the problems existing in the above-mentioned prior art and provides a seed tank type liquid nitrogen composite container to solve the problems present in the existing technology.

In order to achieve the above objectives, the technical solution of this practical new type is as follows:

　　Mother-child tankIt is divided into sub-tank safety protection devices, main tank pressure relief devices, and interlayer protection devices. The sub-tank safety protection devices are equipped on five sub-tanks. After being drawn from the front end of the sub-tank, the end is connected to a three-way valve in parallel with a safety valve and rupture disc; the main tank pressure relief device includes the pressure relief device of the outer tank and a breathing valve; the interlayer protection device introduces nitrogen from an external nitrogen source into the interlayer, with a pressure regulating valve and a parallel nitrogen bypass valve installed on the pipeline. Pressure gauges are installed at both ends of the pressure regulating valve, and a pressure sensor and analyzer are installed at the rear end of the pressure regulating valve.

The above is the technical implementation method of the mother-child tank. If you need to know more, feel free to contact us!