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Heat exchange system and process of atmospheric and vacuum distillation unit

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

Active Publication Date: 2015-04-01
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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  • Heat exchange system and process of atmospheric and vacuum distillation unit
  • Heat exchange system and process of atmospheric and vacuum distillation unit
  • Heat exchange system and process of atmospheric and vacuum distillation unit

Examples

Experimental program
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Effect test

Embodiment 2

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

[0087] Crude oil from outside the boundary with a temperature of 25~50℃ enters the shell side of the third dual-stream heat exchanger 1C through the first pump, and the overhead oil from the atmospheric column with a temperature of 115~135℃ and from the primary The top oil of the distillation column with a temperature of 120-150°C exchanges heat sequentially to 85-105°C; wherein, the mass flow ratio of crude oil to atmospheric column top oil and primary distillation top 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 in Embodiment 1, and will not be repeated.

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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 plant and a process, in particular to a heat exchange system and process for an atmospheric and vacuum plant. 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 uses distillation to cut crude oil into naphtha, jet fuel, diesel, wax oil and vacuum residue fractions according to the different boiling points of the components in crude oil. The level of its distillation technology is directly related to the level of distillation technology The quality, profit and economic benefits of subsequent devices. As the first process of crude oil processing, the energy consumption of the atmospheric and vacuum unit accounts for about 14% to 15% of the total energy consumption of the entire refinery. Through the heat exchange system, the crude oil exchanges heat with each distillate oil, and the residual heat of ea...

Claims

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Application Information

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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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