Unlock instant, AI-driven research and patent intelligence for your innovation.

Reforming pretreatment system, reforming pretreatment method and application

A pretreatment and prehydrogenation technology, which is applied in the treatment of hydrocarbon oil, hydrogenation treatment process, petroleum industry, etc., can solve the problems of incomplete heat exchange, large efficiency loss, low energy utilization efficiency, etc., and achieve effective energy recovery Effects of utilization optimization, reduction of effective energy loss, and improvement of energy utilization

Active Publication Date: 2020-08-14
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the pretreatment system of the above-mentioned reforming unit, the pre-hydrogenation reaction product after heat exchange from the pre-hydrogenation feed heat exchanger contains a lot of heat, and the heat exchange with the stripping tower feed has not been completed; the pre-fractionation The heat exchange between the depentanized oil at the bottom of the tower and the naphtha fed to the pre-fractionation tower has the problems of large effective energy loss and low energy utilization efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reforming pretreatment system, reforming pretreatment method and application
  • Reforming pretreatment system, reforming pretreatment method and application
  • Reforming pretreatment system, reforming pretreatment method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides an existing reforming pretreatment system 200, refer to figure 1 As shown, taking the 840,000 tons / year continuous reforming raw material pretreatment system of a refinery as an example, the pretreatment system of this device adopts the process mode of "fractionation first and hydrogenation". It includes pre-fractionation tower feed heat exchanger 210, pre-fractionation tower 1, pre-fractionation tower kettle reboiler 2, pre-hydrogenation feed heat exchanger 220, pre-hydrogenation heating furnace 3, pre-hydrogenation reactor 4, Stripper feed heat exchanger 230, pre-hydrogenated product air cooler 240, pre-hydrogenated product water cooler 250, pre-hydrogenated liquid separation tank 260, stripper bottom heat exchanger 270, stripper 5 and stripping Tower kettle reboiler 6.

[0049] Reference figure 1 As shown, the naphtha feedstock from the naphtha stabilization system first passes through the pre-fractionation tower feed heat exchanger 210 and the ...

Embodiment 2

[0058] This embodiment provides a reforming pretreatment system 200 provided by the present invention, refer to figure 2 As shown, taking the 840,000 tons / year continuous reforming raw material pretreatment system of a refinery as an example, the pretreatment system of this device adopts the process mode of "fractionation first and hydrogenation". It includes pre-fractionation tower feed heat exchanger 210, pre-fractionation tower 1, pre-fractionation tower kettle reboiler 2, pre-hydrogenation feed heat exchanger 220, pre-hydrogenation heating furnace 3, pre-hydrogenation reactor 4, The stripping tower feed heat exchanger 230, the pre-hydrogenated product air cooler 240, the pre-hydrogenated product water cooler 250, the pre-hydrogenated liquid separation tank 260, and the stripper bottom heat exchanger 270.

[0059] Reference figure 2 As shown, the naphtha feedstock from the naphtha stabilization system is heated to 102 through the pre-fractionation tower feed heat exchanger 21...

experiment example 1

[0067] See Table 1 and Table 2 for the comparison of energy consumption and effective energy loss of the methods and devices provided in Example 1 and Example 2.

[0068] Table 1 Example 1 and Example 2 heat exchange load comparison.

[0069] Example 1 Example 2 Increase / decrease amount,% Load of feed heat exchanger of prefractionator, kW902.94902.940.00 Load of feed heat exchanger of stripper, kW1450.423029.51-108.87 Stripping tower feed / tower bottom heat exchanger load, kW8423.686641.3821.16 Pre-hydrogenation product air cooler load, kW2477.611092.5255.90 Pre-hydrogenation product water cooler load, kW1878.43785.7258.17 Pre-fractionation tower kettle reboiler, kW8536.000.00100.00 Pre-hydrogenation heating furnace, kW 3194.002291.0628.27

[0070] Table 2 Comparison of effective energy loss between Example 1 and Example 2.

[0071]

[0072] It can be seen from Table 1 that the heat exchange load of the feed heat exchanger 210 of the pre-fractionation tower in Example 1 an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a reforming pretreatment system, a reforming pretreatment method and application, and relates to the technical field of catalytic reforming. On the basis of researching the characteristics of the technological process of the reforming pretreatment system and combining the first law and the second law of thermodynamics, the effective energy of the pretreatment system is recycled and optimally designed. The heat of a pre-hydrogenation reaction product is fully recycled, naphtha feed of the pre-fractionating tower is newly added to exchange heat with a pre-hydrogenation reaction product, the temperature of the prefractionator bottom depentanized oil is increased, the prefractionator bottom oil and the pre-hydrogenation feeding heat exchanger are directly subjected to heat exchange and temperature rise, the energy consumption of a heating furnace is reduced, the effective energy loss is reduced, and compared with the prior art, the reforming pretreatment system hasan obvious energy-saving effect.

Description

Technical field [0001] The present invention relates to the technical field of catalytic reforming, in particular to a reforming pretreatment system, a reforming pretreatment method and applications. Background technique [0002] As the pretreatment unit of the reforming reaction system, the reformer pretreatment system is an indispensable part of the reformer. Generally, straight-run naphtha fractions or naphtha from the naphtha stabilization system are used as raw materials, and the impurities in light naphtha are removed by pre-fractionation, pre-hydrogenation and steam stripping to obtain refined oil. Reforming reaction occurs under certain reaction conditions to produce high-octane gasoline components and aromatic hydrocarbons. [0003] The feed of the pre-fractionation system is mainly straight-run naphtha fraction with an initial boiling point of ~175°C or naphtha from the naphtha stabilization system, which is exchanged with the depentanized oil at the bottom of the pre-fr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1044
Inventor 孙欢欢经铁郭建波张英哲王志刚
Owner CHINA PETROLEUM & CHEM CORP