Contact Us

ADD

Address: No. 1 Wanjiadun Avenue, Honghu Economic Development Zone, Hubei Province

PHONE

0716-2298200

Email

Email: hubeilituo@163.com

Coal Tar Distillation Product Recovery Negative-Pressure Benzene Removal Process

　　 Process flow: The rich oil from the benzene washing tower is pressurized by a rich-oil pump and then fed into the lean-rich oil heater, where it exchanges heat with the hot lean oil at the bottom of the benzene recovery tower before entering the benzene-recovery section of the tower. After being further heated in the rich-oil heater, it again enters the benzene-recovery section of the tower. The crude benzene vapor drawn off from the top of the tower is subsequently condensed and cooled, yielding crude benzene that contains trace amounts of water. This crude benzene flows by gravity into an oil-water separator, where the water is separated out, leaving behind purified crude benzene. A portion of the crude benzene is pumped back to the tower as reflux at the top, while the remaining part is sent to an intermediate crude benzene tank. The negative pressure at the tower's top is maintained by a vacuum unit. Meanwhile, part of the lean oil from the tower bottom is cooled and returned to the benzene washing tower, while the other part is heated in a steam heat exchanger and used as a heat source for the benzene recovery tower.

Coal-to-chemicals byproduct recovery negative-pressure benzene removal unit

Technical advantages:
1. Negative-pressure operating conditions favor benzene separation and enhance benzene removal efficiency.
2. Using the high-temperature lean oil from the tower bottom as the heat source for the benzene removal column eliminates the need for direct steam or only requires a small amount of steam, making it more energy-efficient.
3. The benzene removal section, regeneration section, and lean oil tank section utilize a single-tower design, saving space and reducing costs.
4. Use medium-pressure steam as the heat source to replace the tubular furnace for heating the wash oil.

Process performance indicators:

1. Operational Flexibility: Both gas and liquid phase loads must allow for continuous, stable operation within the range of 50–120% of the normal operating load.
2. Total tower pressure drop: The overall tower pressure drop ≤ 20 kPa.
3. Benzene content in lean oil exiting the tower: ≤0.2%.
4. The yield of crude benzene distilled below 180°C ≥ 93%

Integrated Benzene Removal and Regeneration Unit Tower

Guizhou Meijinhuayu Energy Benzene-Removing Tower Baowu Taigang Coking's 15-Year-Old Benzene-Removing Tower

Typical Performance Table for Benzene Removal Tower Equipment Over the Past Three Years

Serial Number

Device Name

Specification parameters

Quantity

Material

User Name

Time

Note

1

Benzene Removal Tower

DN4000/3500

1 unit

Q345R/S30408

Pangang Vanadium Project's Coking Retrofit

2021

Atmospheric Distillation of Benzene

2

Benzene Removal Tower

DN1800/2000 H=28,931

1 unit

Q345R/S30408

Fujian Sangang Mingguang Co., Ltd.

2021

Atmospheric Distillation of Benzene

3

Benzene Removal Tower

DN2900

1 unit

Q345R/S30408

Hebei New Energy Technology Co., Ltd.

2021

Negative-pressure benzene removal

4

Benzene Removal Tower

DN1800/2000 H=28,931

1 unit

Q345R/S30408

Xinjiang Da'an Energy Co., Ltd.

2021

Negative-pressure benzene removal

5

Benzene Removal Tower

DN2600 H=38290

1 unit

Q345R/S30408

Inner Mongolia Hengkun Chemical's Phase II Coking Project

2021

Atmospheric Distillation of Benzene

6

Benzene Removal Tower

DN3600/3800 H = ~29,200

1 unit

Q345R/S30408

Indonesia De Tian Energy

2021

Atmospheric Distillation of Benzene

7

Benzene Removal Tower

DN2000/2400 H = ~39,000

1 unit

Q345R/S30408

Hubei Youke Premium Steel Coking Project

2021

Negative-pressure benzene removal

8

Benzene Removal Tower

DN4200 H = ~30,000

1 unit

Q345R/S30408

Xuyang Weishan New Energy (Indonesia)

2022

Atmospheric Distillation of Benzene

9

Benzene Removal Tower

DN2000 H = ~38,473

1 unit

Q245R/S30408

Liansteel 4.3-meter Coke Oven Environmental Upgrade and Renovation Project

2022

Atmospheric Distillation of Benzene

10

Benzene Removal Tower

DN2400 H=32280

1 unit

Q245R/S30408

Guizhou Qixing Coking

2022

Negative-pressure benzene removal

11

Benzene Removal Tower

DN2600 H=28,200

1 unit

Q245R/S30408

Shanxi Mingguang New Energy Technology

2022

Negative-pressure benzene removal

12

Benzene Removal Tower

DN4200 H=30550

1 unit

Q245R/S30408

Shanxi Meijin Huasheng

2022

Negative-pressure benzene removal

13

Benzene Removal Tower

DN2400 H=29,250

2 units

Q245R/S30408

Inner Mongolia Junzheng Chemical

2023

Negative-pressure benzene removal

14

Benzene Removal Tower

DN2800 H=31450

2 units

Q245R/S30408

Guizhou Meijinhuayu Phase I Coking Plant

2023

Atmospheric Distillation of Benzene

15

Benzene Removal Tower

DN2800 H=31450

1 unit

Q245R/S30408

Guizhou Meijinhua Yu Phase II Coking Plant

2023

Atmospheric Distillation of Benzene

 

%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81%EF%BC%8C%E5%8D%93%E8%B6%8A%EF%BC%8C%E9%A2%86%E5%85%88%EF%BC%8C%E5%85%88%E8%BF%9B%EF%BC%8C%E5%BC%95%E9%A2%86

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home