Petrochemical industry mid-span device heat integrated low temperature heat recovery system and recovery method

Abstract

The invention discloses a petrochemical industry mid-span device heat integrated low temperature heat recovery system and recovery method. The petrochemical industry mid-span device heat integrated low temperature heat recovery system comprises a low pressure heat exchanger, a water inlet manifold, a water return manifold, a diesel heat exchanger and a kerosene heat exchanger. An water inlet of the low pressure heat exchanger is connected with a condensate water pipeline of a turbine, an water outlet of the low pressure heat exchanger is connected with a deaerator, water after being performed heat exchange of the low pressure heat exchanger enters the deaerator, an water outlet end of the water inlet manifold separates into two ways, one way of the water outlet end is communicated with an water inlet of a diesel heat exchanger tube pass via a water inlet pipeline of the diesel heat exchanger, the other way of the water outlet end is communicated with water inlet of a kerosene heat exchanger tube pass via a water inlet pipeline of the kerosene heat exchanger, and a water outlet pipeline of the diesel heat exchanger is integrated with a water outlet pipeline of the kerosene heat exchanger into a water inlet end of the water return manifold. Low-temperature condensate water and treated water are utilized to recover heat of high-temperature purified diesel and purified kerosene in oil refining equipment. The invention discloses a recovery method of the system.

Description

technical field [0001] The invention relates to a heat recovery system and a recovery method in petrochemical industry, in particular to a petrochemical mid-span device heat combined low-temperature heat recovery system and a recovery method. Background technique [0002] At present, heat recovery technology can recover and reuse a large amount of waste heat discharged to the outside during the operation of the device in a certain way, but it is usually only used in similar devices and the heat exchange medium uses the same or similar properties. Such as condensation and steam heat exchange in thermal power plants, the application range and energy saving potential are limited. [0003] Some equipment diagrams of thermal power plants in the prior art are as follows figure 1 As shown, it includes steam turbine condensed water heat exchange equipment and deaerator 106, steam turbine condensed water heat exchange equipment includes condensed water pipeline 101, low-pressure hea...

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Problems solved by technology

At present, air-cooled or water-cooled equipment is mainly used to reduce oil temperature, which requires a lot of power consumption and water consumption

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