CN219539857U

CN219539857U - Raffinate oil light component recovery system

Info

Publication number: CN219539857U
Application number: CN202223450323.XU
Authority: CN
Inventors: 吉祥; 朱德彬; 张飞云; 王世敏; 张亚东; 高俭
Original assignee: Dalian Fujia Dahua Petrochemical Co Ltd
Current assignee: Dalian Fujia Dahua Petrochemical Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-08-18
Anticipated expiration: 2032-12-23

Abstract

The utility model belongs to the technical field of chemical industry, and particularly relates to a raffinate oil light component recovery system which comprises a raffinate oil reflux tank, wherein an inlet pipeline of the reflux tank is connected to an inlet of the raffinate oil reflux tank through a heat exchanger group, an outlet of the raffinate oil reflux tank is connected with an outlet pipeline of the reflux tank, the outlet pipeline of the reflux tank extends upwards and is connected with a fin heat exchanger, the fin heat exchanger is connected to a flare system through a flare discharging pipeline, the flare discharging pipeline and the raffinate oil reflux tank have a height difference, and the flare discharging pipeline is higher than the raffinate oil reflux tank. According to the utility model, the fin heat exchanger is newly added on the top of the raffinate oil reflux tank and the overall height of the flare line is improved, so that the purpose of recovering the liquid carried in the flare gas is achieved, the recovery of the light component in the gas phase of the raffinate oil reflux tank is effectively carried out, and the energy consumption waste is avoided.

Description

Raffinate oil light component recovery system

Technical Field

The utility model belongs to the technical field of chemical industry, and particularly relates to a raffinate oil light component recovery system.

Background

After the temperature of the raffinate oil reflux tank is reduced to about 40 ℃ after heat exchange, partial non-condensable gas carrying part C4, C5 and C6 hydrocarbon liquid is discharged into the torch tank, so that hydrocarbon loss is caused. In order to avoid the waste of resources, the part of oil products need to be reprocessed to cause energy consumption waste.

Disclosure of Invention

According to the defects of the prior art, the utility model aims to provide a raffinate oil light component recovery system which is used for recovering light components in a gas phase of a raffinate oil reflux tank so as to achieve the purposes of energy conservation and consumption reduction.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a raffinate oil light component recovery system, includes raffinate oil reflux drum, and reflux drum inlet line is connected to raffinate oil reflux drum entry through the heat exchanger group, and raffinate oil reflux drum exit linkage reflux drum exit line extends and connects the fin heat exchanger, the fin heat exchanger is connected to the torch system through arranging the torch pipeline, arrange the torch pipeline and have the difference in height with raffinate oil reflux drum, arrange the torch pipeline and be higher than raffinate oil reflux drum.

Further, a first control valve group is arranged on the torch discharging pipeline.

Further, the flare line is higher than the fin heat exchanger.

Further, the reflux drum inlet line is connected from the raffinate column outlet to the raffinate reflux drum inlet via a heat exchanger bank.

Further, the heat exchanger group comprises an air cooler and a water cooler.

Further, the reflux drum inlet line includes a first branch pipe connected to the raffinate oil reflux drum inlet through the air cooler and the water cooler, and a second branch pipe connected to the raffinate oil reflux drum inlet through the air cooler outlet.

Further, the second branch pipe is provided with a first valve close to the outlet of the air cooler.

Further, a nitrogen pipeline is connected to the raffinate oil reflux tank, and the nitrogen pipeline is communicated with an outlet pipeline of the reflux tank.

Further, a second control valve group and a one-way valve are arranged on the nitrogen pipeline.

The beneficial effects of the utility model are as follows: the fin heat exchanger is newly added on the top of the raffinate oil reflux tank and the overall height of the flare torch pipeline is improved, so that the purpose of recovering the carried liquid in the flare gas is achieved, the recovery of the light components in the gas phase of the raffinate oil reflux tank is effectively carried out, and the energy consumption waste is avoided.

Drawings

FIG. 1 is a process flow diagram of the raffinate oil lights recovery system of the present utility model;

in the figure: 1. the system comprises a raffinate oil reflux tank, 2, an inlet pipeline of the reflux tank, 2.1 first branch pipes, 2.2 second branch pipes, 3, an outlet pipeline of the reflux tank, 4, a fin heat exchanger, 5, a flare discharging pipeline, 6, a first control valve group, 7, an air cooler, 8, a water cooler, 9, a first valve, 10, a nitrogen pipeline, 11, a second control valve group, 12, a one-way valve, A, a raffinate tower, B, a flare system, a and gravity flow.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1, a raffinate light component recovery system comprises a raffinate reflux drum 1, a reflux drum inlet pipeline 2 is connected to a raffinate reflux drum inlet through a heat exchanger group, a raffinate reflux drum outlet is connected with a reflux drum outlet pipeline 3, the reflux drum outlet pipeline 3 extends upwards and is connected with a fin heat exchanger 4, the fin heat exchanger 4 is connected to a flare system through a flare discharging pipeline 5, the flare discharging pipeline 5 has a height difference from the raffinate reflux drum 1, and the flare discharging pipeline 5 is higher than the raffinate reflux drum 1. The discharge flare line 5 is higher than the fin heat exchanger 4.

Based on the technical scheme, the reflux tank outlet pipeline 3 extends upwards to be arranged, the fin heat exchanger 4 is higher than the raffinate oil reflux tank 1, and the flare discharging pipeline 5 is higher than the fin heat exchanger 4, so that light components in flare gas can flow back conveniently. It should be noted that the reflux drum outlet line 3 extends upward, and it is not required that the reflux drum outlet line is disposed vertically upward, but rather that the overall height is disposed upward under conditions of adapting to the environment, wherein specific part of the pipe sections may be disposed horizontally, vertically, or obliquely, as long as the line height is ensured to extend upward continuously. To ensure reflux of the light components, the flare line 5 extends upward or is disposed horizontally.

Further, a first control valve group is arranged on the flare discharging pipeline 5.

Further, the reflux drum inlet line 2 is connected from the raffinate column outlet to the raffinate reflux drum inlet via a heat exchanger bank. The heat exchanger group comprises an air cooler 7 and a water cooler 8. The reflux tank inlet pipeline 2 comprises a first branch pipe 2.1 and a second branch pipe 2.2, the first branch pipe 2.1 is connected to the inlet of the reflux tank 1 from the outlet of the raffinate oil tower through an air cooler 7 and a water cooler 8, and the second branch pipe 2.2 is connected to the inlet of the reflux tank 1 from the outlet of the air cooler 7. The second branch pipe 2.2 is provided with a first valve 9 near the outlet of the air cooler 7.

Further, a nitrogen pipeline 10 is connected to the raffinate oil reflux tank 1, and the nitrogen pipeline 10 is communicated with the reflux tank outlet pipeline 2. The nitrogen pipeline 10 is provided with a second control valve group 11 and a one-way valve 12. Nitrogen line 10 enables purging of reflux drum outlet line 2.

The recovery system of the utility model recovers the light components in the gas phase of the raffinate oil reflux tank, and can recover other light hydrocarbon liquids with higher saturated vapor pressure and lower boiling point in the same way.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The foregoing list is only the preferred embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.

Claims

1. The raffinate oil light component recovery system is characterized in that: including raffinate oil reflux drum, reflux drum inlet line is connected to raffinate oil reflux drum entry through the heat exchanger group, and raffinate oil reflux drum exit linkage reflux drum exit line extends and connects the fin heat exchanger, the fin heat exchanger is connected to the torch system through row's torch pipeline, row's torch pipeline has the difference in height with raffinate oil reflux drum, and row's torch pipeline is higher than raffinate oil reflux drum.

2. A raffinate oil light ends recovery system according to claim 1, wherein: and a first control valve group is arranged on the torch discharging pipeline.

3. A raffinate oil light ends recovery system according to claim 1, wherein: the discharge flare line is higher than the fin heat exchanger.

4. A raffinate oil light ends recovery system according to claim 1, wherein: and the inlet pipeline of the reflux tank is connected to the inlet of the raffinate oil reflux tank from the outlet of the raffinate oil tower through the heat exchanger group.

5. A raffinate oil light ends recovery system according to claim 1, wherein: the heat exchanger group comprises an air cooler and a water cooler.

6. The raffinate oil light ends recovery system as claimed in claim 5, wherein: the reflux tank inlet pipeline comprises a first branch pipe and a second branch pipe, wherein the first branch pipe is connected to the raffinate oil reflux tank inlet through an air cooler and a water cooler, and the second branch pipe is connected to the raffinate oil reflux tank inlet through an air cooler outlet.

7. The raffinate oil light ends recovery system as claimed in claim 6, wherein: the second branch pipe is provided with a first valve close to the outlet of the air cooler.

8. A raffinate oil light ends recovery system according to claim 1, wherein: and the raffinate oil reflux tank is connected with a nitrogen pipeline, and the nitrogen pipeline is communicated with an outlet pipeline of the reflux tank.

9. The raffinate oil light ends recovery system as claimed in claim 8, wherein: and a second control valve group and a one-way valve are arranged on the nitrogen pipeline.