A heat exchange system and process for an atmospheric and vacuum device

A technology of atmospheric and vacuum devices and heat exchange systems, which is applied in the direction of indirect heat exchangers, heat exchanger types, and the petroleum industry, and can solve problems such as inability to recover heat to the maximum extent, heat loss, and large investment in equipment

Active Publication Date: 2016-03-30
ZHENHAI PETROCHEM JIANAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a complex heat exchange network not only requires a large investment in equipment, but also will inevitably lead to heat loss when the material flows between the heat exchangers, and cannot recover heat to the maximum extent. Neither the investment in equipment nor the effect of reducing energy consumption is ideal.

Method used

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  • A heat exchange system and process for an atmospheric and vacuum device
  • A heat exchange system and process for an atmospheric and vacuum device
  • A heat exchange system and process for an atmospheric and vacuum device

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Experimental program
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Embodiment 2

[0086] Such as figure 2 As shown, the present embodiment adopts the third double-stream heat exchanger 1C to replace the two single-stream heat exchangers 4A, 4B. The structure of the third double-stream heat exchanger 1C is the same as that of the first and second double-stream heat exchangers.

[0087] The crude oil from the outside with a temperature of 25-50°C enters the shell side of the third double-stream heat exchanger 1C through the first pump, and the atmospheric column top oil with a temperature of 115-135°C from the atmospheric tower and the crude oil from the primary The temperature of the distillation tower is 120-150°C and the initial distillation overhead oil is sequentially heat-exchanged to 85-105°C; wherein, the mass flow ratio of crude oil to atmospheric pressure overhead oil and initial distillation overhead oil is 100:8:24.

[0088] Then enter the shell side of the first three-stream heat exchanger 2A.

[0089] The rest of the content is the same as th...

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Abstract

The invention relates to a heat exchange system and process of an atmospheric and vacuum distillation unit. Heat exchangers having special structures are adopted, multiple streams of material flow are simultaneously or sequentially subjected to heat exchange with material flow in shell pass, the resistance is reduced, the heat exchange efficiency is high, the temperature difference at a hot end is small, the operation is stable, the fouling resistance is good, the occupation area and investment of equipment are reduced, a heat exchange network is optimized, the temperature of a crude oil heat exchange terminal is increased, the crude oil heat exchange temperature can be increased by 4-5 DEG C under the condition that a heat exchange source is unchanged, and the energy saving and consumption reducing effects are very remarkable.

Description

technical field [0001] The invention relates to a chemical device and a process, in particular to a heat exchange system and a process for an atmospheric and vacuum device. Background technique [0002] Heat exchange is a very important means of energy exchange and recycling in chemical plants. Atmospheric and vacuum equipment is a device that cuts crude oil into naphtha, aviation kerosene, diesel oil, wax oil and vacuum residue fractions by means of distillation according to the difference in boiling point of each component in crude oil. The level of distillation technology is directly related to It affects the quality, income and economic benefits of subsequent devices. As the first process of crude oil processing, the energy consumption of atmospheric and vacuum devices accounts for about 14% to 15% of the total energy consumption of the refinery. Through the heat exchange system, the crude oil exchanges heat with each distillate oil, recovers the waste heat of each dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/00F28D7/00
CPCC10G53/00F28D7/0066F28D7/02
Inventor 王健良张贤安胡兴苗周奎儿马慧丽王宇陶江
Owner ZHENHAI PETROCHEM JIANAN ENG
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