Shallow cold oil absorption device of liquified gas separated from natural gas

The utility model relates to a shallow cold oil absorption device for separating liquid gas from natural gas, which comprises a shallow cold separating unit and an oil absorption purifying unit. A raw material inlet pipe a is connected with a refrigerator, and a gas-liquid separator is communicated in to form the shallow cold separating unit. In the adsorption refining unit, a top outlet pipe of the gas-liquid separator is communicated into the lower part of an absorption tower, and a bottom outlet pipe of the gas-liquid separator is communicated into the upper part of a desorption tower through a cold exchanger. The top of the absorption tower is provided with a dry gas outlet b, and a bottom outlet pipe of the absorption tower is incorporated with the bottom outlet pipe of the gas-liquid separator to be communicated into the upper part of the desorption tower. A top outlet pipe of the desorption tower returns the raw material inlet pipe a, and a bottom outlet pipe of the desorption tower enters the middle of the desorption tower through a heat exchanger. One path of a bottom outlet pipe of the desorption tower enters the upper part of the absorption tower through the cold exchanger and the refrigerator, and the other path is communicated with a heavy hydrocarbon outlet c. One path of a top outlet pipe of the desorption tower is a civil liquid gas outlet d, and the other path is communicated into the middle of a debutanizing tower. The top of the debutanizing tower is an automotive outlet e, and a bottom outlet pipe of the debutanizing tower is connected with the heavy hydrocarbon outlet c. The utility model has the advantages of simple designed structure and less investment. The utility model can be used for deep separating and refining natural gas raw materials, the higher purity and the higher yield of automotive liquid gas and civil liquid gas are achieved, and economic added values of products are improved.