Method for retrieving and using technical remaining heat in petroleum refining process

A technology for petroleum refining and waste heat, which is used in household heating, heating methods, lighting and heating equipment, etc. It can solve the problem of hot water network heat recovery - low utilization rate, complicated heat consumption of heat sink users, and insufficient network flexibility, etc. To improve the hot water energy utilization process, improve flexibility and operability, and optimize hot water energy utilization

Inactive Publication Date: 2007-12-26
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

However, the low-temperature waste heat of the process after the process heat exchange has limited its application range due to its wide source and large load difference. Therefore, hot water is usually used as the heat medium to collect the waste heat of the low-temperature process for unified use.
The traditional process uses a set of hot water system to recover and utilize the waste heat of the low-temperature process, but the cold flow of the heat source part in the hot water network is relatively small, which limits the reasonable matching of cold and hot logistics in the network. In addition, there is also a biased heat flow in the heat sink part The problem of few problems not only restricts the use of waste heat in low-temperature processes by heat sink users, but also leads to low heat recovery-utilization rates in hot water networks; The hot water system makes the network less flexible, and the traditional process usually has the problem of large operational fluctuations

Method used

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  • Method for retrieving and using technical remaining heat in petroleum refining process
  • Method for retrieving and using technical remaining heat in petroleum refining process
  • Method for retrieving and using technical remaining heat in petroleum refining process

Examples

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Embodiment 1

[0027] Embodiment 1 Recovery and utilization method of process waste heat of the present invention

[0028] Note: The 1 catalytic device and the 2 catalytic device described in this example are the same as the 1 catalytic device and the 2 catalytic device mentioned in the comparative example above. 1 The circulation and reflux of the main fractionation tower top of the catalytic cracking unit is referred to as 1 catalytic top circulation, 1 the circulation and reflux of the first middle section of the main fractionation tower of the catalytic cracking unit is referred to as 1 catalytic middle, 2 the circulation and reflux of the main fractionation tower top of the catalytic cracking unit is referred to as 2 catalytic top circulation, 2 The circulating reflux in the first middle section of the main fractionation tower of the catalytic cracking unit is referred to as 2 catalytic first middle.

[0029] As shown in Fig. 4, the double hot water network system of the present inventi...

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Abstract

This invention relates to a method for recovering and utilizing waste heat in oil refining including: 1, a high temperature hot water system recovers waste heat of all high temperature level and part of low temperature level and a low temperature hot water system recovers residual low temperature waste heat at a source part, 2, a heat trap part is divided into a stable part and an unstable part, the stable trap is taken as the main part of the high temperature hot water system and the unstable one is taken as the main part of the low temperature hot water system, 3, hot water is cooled to a stipulated temperature by a cooling system then sent to the source part to collect heat before returning to the source part.

Description

technical field [0001] The invention relates to the field of waste heat recovery in the oil refining industry, in particular to a method for recovering and utilizing process waste heat by using a multiple hot water system in oil refining. Background technique [0002] In my country's process industry, the oil refining industry occupies an extremely important position. The products of the oil refining industry are essential raw materials for various industries of the national economy, national defense modernization and people's lives. The characteristic of the oil refining industry is to separate different components in the oil through thermal energy drive. Therefore, a large amount of low-temperature process waste heat is generated in the production process of the oil refinery unit. If these process waste heat can be used reasonably and efficiently, the energy of the oil refining industry will be improved. consumption is further reduced. However, the low-temperature waste h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/00
Inventor 李国庆王萌李亚军
Owner SOUTH CHINA UNIV OF TECH
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