Shipping and unshipping system of low-temperature liquid-state ethylene storage tank

Abstract

The invention provides a shipping and unshipping system of a low-temperature liquid-state ethylene storage tank. The ethylene storage tank is connected with a shipping pump and a conveying pump; the shipping pump is connected with a shipping and unshipping pipeline; the shipping and unshipping pipeline is connected with a liquid conveying arm of a wharf; the liquid conveying arm is connected with a low-temperature ship berthed on the wharf; the conveying pump is connected with a pre-cooling pipeline and the other end of the pre-cooling pipeline is connected with the shipping and unshipping pipeline of the wharf, wherein low-temperature ethylene stored in the low-temperature ethylene storage tank is pressurized through the shipping pump and then is conveyed; the low-temperature ethylene is conveyed to the communicated low-temperature ship for storage through the shipping and unshipping pipeline and the liquid conveying arm, thus forming a shipping system; the low-temperature ethylene stored in the low-temperature ship is pressurized through the pump in the ship and then is conveyed, the liquid-state low-temperature ethylene is conveyed to the communicated ethylene storage tank for storage through the liquid conveying arm and the shipping and unshipping pipeline, thus forming an unshipping system; less low-temperature ethylene in the low-temperature ethylene storage tank passes through the wharf from the pre-cooling pipeline of a tank region and then passes through the shipping and unshipping pipeline, and then is returned back to the low-temperature ethylene storage tank; before shipping and unshipping operation, the shipping and unshipping pipeline is subjected to low-temperature pre-cooling in advance and a pre-cooling system is formed. The shipping and unshipping system has the characteristics of reasonable and simple structure, convenience and reliable in utilization, capabilities of saving a lot of investment and saving energy sources and the like.

Description

technical field [0001] The invention relates to a loading and unloading system of a low-temperature liquid ethylene storage tank, and belongs to the technical field of low-temperature liquid ethylene storage and transportation. Background technique [0002] At present, most of the low-temperature ethylene is transported to domestic docks by low-temperature ships, and then the low-temperature liquid ethylene is unloaded to storage tanks through infusion arms and ship unloading pipelines. With the establishment of domestic MTO (methanol to olefins) plants, low-temperature liquid ethylene can also be obtained through the liquefaction of gaseous ethylene, and this part of liquid ethylene can be delivered by low-temperature tank trucks and low-temperature tank ships. The general capacity of low-temperature tank trucks is only tens of tons, while the capacity of low-temperature tank ships can reach several thousand to tens of thousands of tons. The establishment of a set-up ship s...

AI Technical Summary

Problems solved by technology

[0003] Traditional cryogenic liquid (such as LNG) loading and unloading systems generally require a gas phase pipeline and a liquid phase pipeline, and a transmission pipeline is often several kilometers long. It will cost tens of millions and require a large investment

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