Rongteng

Leave Your Message

Process technology proposal and description of 10MMSCFD BOG liquefying plant (2)

2024-06-16

Liquefaction unit

1) Process description

Compressed BOG enters the cold box and is gradually refrigerated and super-refrigerate to -162 ℃ , and then enters the LNG storage tank after throttling . The main equipment is the cold box, which mainly includes plate heat exchangers and various separators, etc.

2) Design parameters

Liquefaction capacity: 10MMSCFD

Liquefaction temperature: -162 ℃

3) Scope of application:50%~110%

 

Mixed refrigerant compression and proportioning unit

1) Process description

The mixed refrigerant of this device will be composed of methane, nitrogen and hydrocarbon refrigerants.

The main equipment is refrigerant circulation compressor, refrigerant proportioning tank, etc.

2) Design parameters

Liquefaction capacity: 10MMSCFD

Compressor type: Screw compressor

Compressors: 1 set

Suction pressure: 0.4 MPa.G

Inhalation temperature: 37.5 ℃

Exhaust pressure: 1.9 MPa.G (referring to the outlet flange of the final stage cooler)

Exhaust temperature: 40 ℃ (referring to the outlet flange of the final cooler)

3) Scope of application: 50%~110%.

Chinese LNG plant supplier.jpg

Safety discharge unit

The device's safety relief is integrated into the user's existing relief system.

 

The supply list of process equipment for this device is as follows:

  1. Feed gas compressor unit

S/N

Device Name

Qty

supplier

Remark

1

BOG Compressor

1 set

Yantai Binglun

Screw machine

  1. Liquefaction Unit

S/N

Device Name

Qty

Supplier

other instructions

1

Liquid cold box

1

Chuankong, Sanchuan or equivalent

 

1.1

Liquefaction heat exchanger

1

Chuankong, Sanchuan or equivalent

Aluminum plate fin heat exchanger

1.2

Regulating valve

1 set

 

 

1.3

Primary instrument

1 set

 

 

1.4

Cryogenic pipes and manual valves

1 set

 

Stainless steel

1.5

Cold box insulation material

Sufficient

 

 

2

Nitrogen electric heater (20kw)

1 set

Chinese supplier

 

3

Residue vaporizer

(200Nm3 /h)

1 set

Chinese supplier

Air temperature type

  1. MRC refrigeration and refrigerant proportioning unit

S/N

Device Name

Qty

Supplier

other instructions

1

Refrigerant compressor

1 set

Yantai binglun

Screw machine

2

Refrigerant integrated skid

1

Sichuan Jinxing

 

2.1

Ethylene Vaporizer

1 set

Chinese supplier

 

2.2

Refrigerant dryer

1 set

Sichuan Jinxing

 

  1. Manual Valves and Filters

S/N

Device Name

Qty

other instructions

Manual Valves and Filters

1

Manual cryogenic valve

1 set

Empty valve or equivalent

2

Manual medium and normal temperature valve

1 set

Fangzheng Valve, Huanqiu, Zhejiang Shuangda or equivalent

3

Safety valve

1 set

Zhejiang Yongyi, Chengkong Valve or equivalent

4

Pipeline filter

1 set

Fangzheng Valve, Huanqiu, Zhejiang Shuangda or equivalent

         
  1. Instrument electrical control list

(1) Instrument control

S/N

Device Name

Qty

Supplier

One

PLC System

1 set

Siemens

Two

SIS system

1 set

Hollysys , Zhejiang Zhongkong or equivalent

Three

GDS System

1 set

Shanghai Yijie, Meisi'an or equivalent

Four

Control valve

1 set

 

1

Emergency shut-off valve (normal temperature)

1 set

Fuyang Hengtu, Zhejiang Paiwo, Xuzhou Aka

2

Other switch valves

1 set

Fuyang Hengtu, Zhejiang Paiwo, Xuzhou Aka

3

Cold box regulating valve

1 set

Wuxi Tooling, Hangyang Tooling , Fuyang Hengtu

4

Other regulating valves

1 set

Fuyang Hengtu, Zhejiang Paiwo, Xuzhou Aka

5

Pressure and differential pressure transmitters

1 set

Guangzhou Paisheng or equivalent

6

Platinum thermal resistor

1 set

Kawaii or equivalent

7

Standard orifice plate

1 set

Deyang Xintai/Chuanyi or equivalent

8

Gas turbine flowmeter

1 set

Cangnan/Tianxin

9

Local level gauge

1 set

Shanghai Xingshen or equivalent

10

Stainless steel pressure gauge, differential pressure gauge

1 set

Brady/Kawai or equivalent

11

UPS

1 set

Santa/Golden Warrior or equivalent

Five

analysis system

1 set

 

1

Gas Chromatograph

1 set

Xi'an Taige or Mike

(2) Electrical control

S/N

Device name

Qty

Supplier

Remark

1

Low voltage incoming cabinet

1 set

Xinsanxin​

 

2

Emergency power switch cabinet

1 set

Xinsanxin​

 

3

Compensation cabinet

1 set

Xinsanxin​

 

4

Chest of drawers

2 units

Xinsanxin​

 

5

UPS power cabinet

1 set

Eastar, Kehua Technology

 

6

On-site operation column

Several

Helong explosion-proof

 

7

Compressor high voltage soft start cabinet

1 set

INVT, XCI

 

illustrate:

1.     The above quantities are subject to final supply.

 

        We specialize in gas field wellhead treatment, natural gas purification, LPG recovery, LNG plant and natural gas generator set.

 

Contact:

Sichuan Rongteng Automation Equipment Co., Ltd.

Phone/WhatsApp/Wechat : +86 177 8117 4421  

Website: www.rtgastreat.com     Email: info@rtgastreat.com

Address:No. 8, Section 2 of Tengfei Road, Shigao Subdistrict,Tianfu New Area, Meishan city, Sichuan China 620564