Process for storing liquid phase ethylene at combined ordinary pressure and medium pressure
A technology of normal-pressure liquid-phase ethylene and medium-pressure liquid-phase ethylene, which is applied in gas/liquid distribution and storage, container filling methods, equipment for loading pressure vessels, etc. problems, to achieve the effect of less investment in equipment, saving investment and low energy consumption
Active Publication Date: 2008-10-29
NEW SOLAR TECH GRP CO LTD
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Problems solved by technology
However, this method has a small tank capacity, which is not conducive to optimizing the use of cooling capacity
Although the applicant applied on November 4, 2003 for a combined liquid-phase ethylene storage method of atmospheric pressure and medium pressure, which overcomes the respective shortcomings of the above-mentioned normal pressure and medium pressure storage methods, it has the advantages of large tank capacity, low equipment investment, and economical The advantages of energy consumption, but there are still shortcomings, that is, the above method still needs a common refrigeration system and an external low-temperature refrigerant to condense the vaporized gas-phase ethylene, and then realize the storage of liquid-phase ethylene
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[0018] The storage method provided by the present invention will be further described in detail in the following examples given in conjunction with the accompanying drawings, but the present invention is not limited thereby.
[0019] Such as figure 1 As shown, a liquid-phase ethylene storage method combining normal pressure and medium pressure uses the normal-pressure liquid-phase ethylene storage tank 1 and the medium-pressure liquid-phase ethylene storage tank 4 at the same time. When storing liquid-phase ethylene, the normal-pressure liquid-phase ethylene storage tank The vaporized gas-phase ethylene in the tank 1 is boosted by the gas-phase ethylene booster system 2, and / or the gas-phase ethylene in the medium-pressure liquid-phase ethylene storage tank 4 is sent to the medium-pressure liquid-phase ethylene heating system 3, and is transferred from the normal pressure liquid The medium-pressure low-temperature liquid-phase ethylene from the ethylene storage tank 1 boosted ...
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The inventive method uses atmospheric pressure and medium pressure liquid-phase ethylene storage tanks. When storing the liquid-phase ethylene, the gas-phase ethylene vaporized in the atmospheric pressure liquid-phase storage tank is boosted via a gas-phase ethylene boosting system, and then transferred into the medium pressure liquid-phase ethylene boosting system with the gas-phase ethylene in the medium pressure liquid-phase ethylene storage tank and at last they are condensed to the medium pressure liquid-ethylene by the medium pressure low-temperature liquid-phase ethylene from the atmospheric pressure liquid-phase ethylene storage tank and fed to the medium pressure liquid-phase ethylene storage tank to be stored and / or to be pumped to the downstream.
Description
technical field [0001] The invention relates to a liquid-phase ethylene storage method combined with normal pressure and medium pressure. Background technique [0002] Ethylene is an important chemical raw material. There are currently two popular methods of liquid-phase ethylene storage. One is the normal pressure storage method, that is, the liquid phase ethylene is stored in the normal pressure storage tank. Ethylene in the liquid phase vaporizes due to the rise in the ethylene level in the tank and the heat absorbed by the tank. Therefore, when storing liquid-phase ethylene at atmospheric pressure, in addition to a gas-phase ethylene booster system, a gas-phase ethylene condensation system, a propylene refrigeration system and a throttling expansion process are also required. In this way, the vaporized ethylene can be returned to the normal-pressure liquid-phase ethylene storage tank again, realizing the normal-pressure storage of liquid-phase ethylene. The advantage...
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IPC IPC(8): F17C5/04F17C6/00F17D1/14
Inventor 张晶魏亚非
Owner NEW SOLAR TECH GRP CO LTD