Reforming heat recycling technology and device

A technology of heat recovery and process, which is applied in the field of refining and chemical production, can solve the problems of optimal design of unproduct fractionation unit, unexplained heating load of fractionation part, etc., and achieve the effect of reducing steam consumption, reducing fuel consumption and reducing heating load

Active Publication Date: 2016-02-17
SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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Problems solved by technology

[0006] The above-mentioned disclosed invention only optimizes the design of the reforming reaction oil-gas separation unit, does not optimize the design of the product fractionation unit, and does not explain how to reduce the heating load of the fractionation part

Method used

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  • Reforming heat recycling technology and device
  • Reforming heat recycling technology and device

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Embodiment 1

[0027] Taking the 1.2 million tons / year reforming unit of a certain oil refinery as an example, the reforming heat recovery and utilization method of the present invention is illustrated.

[0028] The technological process in the prior art is:

[0029] Feed to the depentanizer from the oil-gas separation unit of the reforming reaction (40°C, mainly C 5 -C 10 Component) enters the depentanizer feed-column bottom heat exchanger 1, exchanges heat with the depentanizer bottom oil to 165°C, and enters the depentanizer 2. Depentanizer overhead oil gas (110°C, C 5 The following components) enter the air cooler 7 and water cooler 8, cool to 40°C, enter the reflux tank 9 for gas-liquid separation, the gas phase enters the gas pipe network, the liquid phase is partially refluxed after pressurization, and partly enters the debutanizer for feeding - The tower bottom heat exchanger 10, exchanges heat with the debutanizer bottom oil to 75°C, enters the debutanizer 11, and separates light...

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Abstract

The invention provides a reforming heat recycling technology and device. The technology comprises the steps of recycling top oil gas heat of a depentanizer, strengthening heat exchange of fed materials of the depentanizer and base oil of the depentanizer and improving heat exchange of the base oil of the depentanizer and fed materials of a debutanizer. The invention further provides the reforming heat recycling device, wherein cold low-separated oil and hot low-separated oil of a reaction oil gas separating unit are connected with a feeding port of the depentanizer through a heat exchange unit, and top oil of the depentanizer is connected with a feeding port of the debutanizer through the heat exchange unit. According to the reforming heat recycling technology and device, the temperature of the fed materials of the depentanizer and the debutanizer can be increased, and the load of a reboiling furnace at the bottom of the depentanizer and the heating load of the bottom of the debutanizer are reduced; compared with the prior art, fuel consumption of the depentanizer can be reduced by 10%-20%, steam consumption of the debutanizer can be reduced by about 10%-30%, and the obvious energy saving effect is achieved.

Description

technical field [0001] The invention relates to the field of oil refining and chemical production, in particular to a process and device for recovering and utilizing reforming heat. Background technique [0002] The reforming unit belongs to the secondary processing unit of oil refining. It mainly uses low-octane straight-run naphtha, hydrogenated naphtha and other raw materials to undergo reforming reaction under the catalyst and certain pressure and temperature conditions to produce high-octane Reformed gasoline with alkane value and by-product hydrogen, reformed gasoline can be used as aromatic hydrocarbon raw material, or as a gasoline blending component. [0003] The production process of the reforming unit includes five units: raw material pretreatment, reforming reaction, reaction oil and gas separation, product fractionation and catalyst regeneration. The reaction oil-gas separation and product fractionation process flow is as follows: the reforming reaction product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/04
Inventor 余金森沈雪松孙虎良阮慧娟张体木
Owner SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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