Heat recovery device and recovery method in oil refining process

Abstract

The invention discloses a device and a method for recovering heat in an oil and fat refining process and belongs to the technical field of heat recovery. The device comprises a raw oil tower, a first heater, a drying tower, a mixer, a bleaching tower, a filter, a second heater, a deodorization tower, a water cooler and a finished product tank which are successively connected, and further comprises a first heat exchanger and a second heat exchanger, wherein a valve I is arranged on a pipeline between the raw oil tower and the first heater; a branch is arranged on a pipeline between the raw oil tower and the valve I, a valve II for controlling the second heat exchanger is arranged on the branch, and the other end of the branch is connected with a cold source inlet of the second heat exchanger; and a valve III is arranged on a pipeline between a heat source inlet and a heat source outlet of the first heat exchanger. By virtue of the arrangement of the first heat exchanger, the second heat exchanger, the valve I, the valve II and the valve III, the heat of product oil is used for heating raw oil by virtue of the heat exchangers, the temperature required to be raised is raised, and the temperature required to be lowered is lowered, so that the aims of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention belongs to the technical field of heat recovery, and in particular relates to a heat recovery device and a recovery method in the oil refining process. Background technique [0002] The existing oil refining process includes the following steps: hydration, alkali refining, water washing, drying and decolorization of the stirred crude oil, filtration of essential oils, and deodorization to obtain refined finished oils; the deodorization process is carried out in the deodorization tower by steam extraction After deodorization, the finished oil is made; however, the finished oil after deodorization by the deodorization tower is generally around 240°C. If such a high temperature is used for natural cooling, not only the cooling time will be long, but also the heat energy will be wasted, which will easily cause the oil to oxidize. In addition, since the processing profits of crude oil and refined refined oil are low, it is particularly importa...

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Problems solved by technology

[0002] The existing oil refining process includes the following steps: hydration, alkali refining, water washing, drying and decolorization of the stirred crude oil, filtration of essential oils, and deodorization to obtain refined finished oils; the deodorization process is carried out in the deodorization tower by steam extraction After deodorization, the finished oil is made into finished oil; however, the finished oil after deodorization through the deodorization tower is generally around 240°C. If such a high temperature is used for natural cooling, not only the cooling time will be long, but also heat energy will be wasted, which will easily cause oil oxidation.

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