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Crude oil gradual distillation energy saving apparatuses and technological process

A technology of energy-saving equipment and process methods, applied in the direction of vacuum distillation, etc., can solve the problems of high energy consumption in crude oil processing, and achieve the effects of improving product quality, reducing scale, and reducing heat load

Active Publication Date: 2009-01-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem in production is the high energy consumption of crude oil processing. Atmospheric pressure furnace and vacuum furnace are the main energy consumption equipment of atmospheric and vacuum distillation unit

Method used

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  • Crude oil gradual distillation energy saving apparatuses and technological process
  • Crude oil gradual distillation energy saving apparatuses and technological process
  • Crude oil gradual distillation energy saving apparatuses and technological process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: use the method of the present invention for the transformation of a certain crude oil distillation unit. The original flow process mainly includes the initial distillation tower, atmospheric furnace, atmospheric tower, decompression furnace, and decompression tower. The original processing capacity of the device is 3.5 million tons / day annual crude oil. The flow chart is shown in Figure 1, mainly including a flash distillation tower, an initial distillation tower, an initial decompression tower, a shallow decompression furnace, a shallow decompression tower, a deep decompression furnace, and a deep decompression tower. After the transformation, the design and processing capacity of the device will be increased to 6 million tons / year, and the maximum can reach 7 million tons / year.

[0030] The crude oil 1 is heated to 150° C. through the heat exchange network 36 and enters the flash tower 2 . The gas 3 and part of the light gasoline 4 are extracted from th...

Embodiment 2

[0032] Embodiment 2: the present invention can also be realized through the following technical solutions:

[0033] The flow chart is shown in Figure 2, which mainly includes a flash tower, an initial distillation tower, an initial decompression furnace, an initial decompression tower, a shallow decompression furnace, a shallow decompression tower, a deep decompression furnace, and a deep decompression tower.

[0034] The crude oil 1 is heated to about 150° C. through the heat exchange network 36 and enters the flash tower 2 . The gas 3 and part of the light gasoline 4 are extracted from the top of the flash tower, and the flash bottom oil 5 enters the electric desalination device 6 . The crude oil after electric desalination, desalination and dehydration is about 135°C, and it passes through the heat exchange network 37 to exchange heat to about 275°C and enters the initial distillation tower 7; the gasoline component 8 is extracted from the top of the initial distillation to...

Embodiment 3

[0036] Embodiment 3: the present invention can also be realized through the following technical solutions:

[0037] The flow chart is shown in Figure 3, mainly including flash tower, initial distillation tower, initial decompression tower, shallow decompression furnace, shallow decompression tower, deep decompression furnace and deep decompression tower.

[0038] The crude oil 1 is heated to 150° C. through the heat exchange network 36 and enters the electric desalination device 6 . The crude oil after desalination and dehydration from the electric desalination is about 135° C. and enters the flash tower 2 . The gas 3 and some light gasoline 4 are extracted from the top of the flash distillation tower, and the flash bottom oil 5 passes through the heat exchange network 37 to exchange heat to about 275°C and enters the primary distillation tower 7; the gasoline component 8 is extracted from the top of the primary distillation tower, and the initial The distillation tower is pro...

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Abstract

The invention belongs to crude oil gradual distillation energy-saving equipment and a process method. According to a connecting mode of crude oil gradual distillation, the equipment comprises a flash distillation tower, a primary distillation tower, a primary decompression tower, a shallow decompression tower and a deep decompression tower; an electrical desalting device and a heat exchange network are arranged between the flash distillation tower and the primary distillation tower; a heat exchange network or a primary decompression furnace is arranged between the primary distillation tower and the primary decompression tower; a shallow decompression furnace is arranged between the primary decompression tower and the shallow decompression tower; and a deep decompression furnace is arranged between the shallow decompression tower and the deep decompression tower. Through gradual heating, crude oil is gradually heated to be close to the condensed temperature and vaporized so as to substantially reduce the nonreversibility of heating and cooling; simultaneously, as light components are gradually drawn out, the residual materials can realize vaporization under the lower pressure; therefore, the materials can enter the decompression and distillation stage after passing through the primary distillation tower; the gradual decompression technology of primary decompression, shallow decompression and deep decompression is adopted to reduce the heating temperature of raw materials, lighten the load of a heating furnace and remarkably improve the processing capacity of the system.

Description

technical field [0001] The invention belongs to the field of petroleum processing, in particular to energy-saving equipment and a process for gradual distillation of crude oil. Background technique [0002] Crude oil distillation is the leader of refineries. It uses heating and decompression methods to obtain distillate products such as gasoline, kerosene, diesel oil, wax oil and residual oil through atmospheric distillation and vacuum distillation. Generally, after the crude oil has been desalted and dehydrated, it is heated through the heat exchange network system to about 240-260°C and enters the initial distillation tower. Light gasoline or reformed raw materials are separated at the top of the initial distillation tower, and the bottom oil of the initial distillation tower is passed through heat exchange. Network heat transfer to about 290-310°C enters the atmospheric furnace, and the normal pressure furnace is heated to about 350-370°C and enters the atmospheric tower ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/06
Inventor 李鑫钢王子君李洪朱天榆罗铭芳姜斌刘春杰覃向荣陈宁许力强
Owner TIANJIN UNIV
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