LNG Liquefaction Plant

LNG Liquefaction Plant

The optimization of energy resource structure has taken place in the world, because environment protection is attracting increasingly more attention. Since LNG (liquefied natural gas) is regard as the cleanest energy worldwide, more and more countries tend to use LNG with respect to its cleanness.

Our company began to develop LNG purification and liquefaction plant as early as in 1980s. Until now we have provided about 30 sets of LNG separation plants. The technique includes expander process, MRC mixed cold process and so on. We also made the first set of 100% skid-mounted LNG plant (50000Nm3/day) in China, which was installed in Inner Mongolia in 2015.

Description

Features of our skid-mounted LNG plants
1. Highly compact skid-mounted structure: total 3 parts including
1) Metering, pressure control & purification system package;
2) Liquefaction system;
3) Public utility and accessories. After all packages reach the job site, the client only needs to connect the flanges, pipelines, etc. Once the LNG plants set on the foundation skid, which greatly reduces workload on site.
2. Highly integration of prevailing internet of objects technology (IOT): DCS self-control system;
3. Short time of construction and high efficiency: 3-6 months for manufacturing, while only 15 days for installation and commissioning.
4. Furthermore, the LNG plants are featured by small land occupation, environmental friendly and low energy consumption. Hence the whole LNG plant can be installed on a field of 60*60m, the main equipment/device is only about 16.5*16.5m. During very short period, the whole plant can be easily moved from one to another;

Natural gas pre-treatment and purification system including:
1. Desulphurization decarbonization system
Process: (MDEA+MEA) mixed amine method
(MDEA+ activator) MDEA method
Software: AMSIM, recognized by Chinese authorities
Results: CO2＜50ppm, H2S＜4ppm

2. Dehydrating system
Dehydration by using 4A molecular sieve
Process by using three towers (or two towers): need less regenerative gas, so that it is more stable in operation
Besides, molecular sieve dryer: designed in accordance with GB150 and tested by fatigue analysis

3. Mercury removal system: 10ng/nm3
The sulfur-loaded activated carbon is used to adsorb mercury, while it can be used for 3-5 years. Since it is one tower or two towers, no need for regeneration. Moreover, a filter is set behind the mercury removal system.

4. Aromatic hydrocarbon and heavy hydrocarbon removal system
From heavy hydrocarbon separator in the cold box, the heavy hydricarbon is separated and then adsorbed by scrubbing solution. After that, it goes out from tower bottom, gets separated, and at last gets stored in the storage tank.

Main processes/methods used for natural gas liquefaction by LNG purification and liquefaction plant:
1) expansion refrigeration circulation 
Nitrogen methane expansion or nitrogen double expansion with freon as pretreatment, while is mainly used for small type liquefaction plant with a capacity of 300,000 m3/day or below;
2) single mixed refrigerant circulation
Divided into both single stage throttling and multi stages throttling.
Liquefaction capacity: 300-2,000,000 m3/day
3) multi-refrigerant circulation 
Mixed refrigerant circulation with propane as pretreatment; while liquefaction capacity: 2,000-10,000,000 m3/day.
Besides, multi mixed refrigerant circulation with propane as pretreatment and mixed refrigerant circulation by nitrogen expansion for supercooling; while liquefaction capacity: 10,000,000 m3/day or above;

Furthermore, only an elite team of experts from cryogenic, instrument and electronics fields is able to plan a perfect LNG purification and liquefaction plant project. In addition, the ability of processing and manufacturing must be supportive. Especially, the key technology and equipment, such as liquefaction cold boxes and tanks, are all necessary to fulfill the project. We are proud to have a strong design team as well as a manufacture team. As a result, with our rich experience, we are able to design, manufacture and install complete sets of natural gas liquefaction plant for different customers. We will help you to build your exclusive LNG purification and liquefaction plant, which is both reliable and energy-saving.

Achievements Table on LNG Project

S.N. Description Liquefaction process Users
1 100000Nm3/d nature gas liquefaction plant (main contractor) Circulating liquefaction process bytwo-stage nitrogen expansion refrigeration Chengdu Yonglong LNG Company Co., Ltd
2 200000 Nm3/d nature gas liquefaction plant (main contractor) Liquefaction process by two-stage nitrogen expansion refrigeration circulating and denitrification Export to Poland
3 135000 Nm3/d nature gas liquefaction plant (main contractor) Liquefaction process by expansion refrigeration of mixed refrigerant N2-CH4 with pre-cooling Inner Mongolia Erdos Xinsheng Fuel Gas Technical Co., Ltd.
4 300000 Nm3/d nature gas liquefaction plant (main contractor) Liquefaction process by expansion refrigeration of mixed refrigerant N2-CH4 with pre-cooling Ningxia Yinchuan
5 2400000ton/a,3400000ton/a nature gas liquefaction technical process(including research & development) Liquefaction process by propane pre-cooling & refrigerating of mixed refrigerant CNOOC North Pars project
6 600000 Nm3/d nature gas liquefaction plant (main contractor)
7 1000000 Nm3/d nature gas liquefaction plant (main contractor)
8 600000 Nm3/d nature gas liquefaction plant (main contractor)
9 1000000 Nm3/d nature gas liquefaction plant EPC (general contracting)
10 2000000 Nm3/d nature gas liquefaction plant EPC (general contracting)
11 270000Nm3/d nature gas liquefaction plant (main contractor)
12 2000000Nm3/d nature gas liquefaction plant (main contractor)
13 270000Nm3/d differential -pressure type partial liquefaction LNG plant (main contractor) Partial liquefaction process with differential pressure type Wuhan Zhongneng Fuel Gas Limited Company.
14 500000Nm3/d nature gas liquefaction plant (main contractor)
15 1000000Nm3/d nature gas liquefaction process package Liquefaction process by refrigeration of mixed refrigerant Shanxin Yanchang Petroleum Group
16 500000Nm3/d nature gas liquefaction plant (main contractor)
17 1000000Nm3/d nature gas liquefaction plant (main contractor)
18 20000Nm3/h LNG project with high methane gas liquefaction plant by intensive processing of resolution gas Liquefaction process by refrigeration of mixed refrigerant HeiLongjiangShuangYashan
19 33000Nm3/h LNG project by methanation of coke oven gas Liquefaction process by refrigeration of mixed refrigerant Henan Anyang
No Date Projects Capacity (Nm3/d)
1 2004 Fushan liquefied natural gas (LNG) plant in Hainan Province 25×104
2 2005 Hainan power grid Qinglan vaporizing station of power plant 72×104
3 2007 Hainan Fushan LNG plant condensate gas processing plant 25×104
4 2007 Songzi compressive gas treatment plant in Hubei province 5×104
5 2008 High energy liquefied coal bed methane project in Shanxi province 30×104
6 2009 China natural gas corporation limited Dengkou LNG plant 30×104
7 2010 Borui Lunnan LNG plant in Xinjiang province 30×104
8 2011 Heibei Cangzhou gas transmission pipeline project 60×104
9 2011 Daqing primary CNG filling station 30×104
10 2012 Tianjin Dagang oil field Binhai new energy LNG peak shaving plant 30×104
11 2012 Jiangxia 30×104 Nm3/d LNG plant 30×104
12 2013 Yibing Light Hydrocarbon technological upgrading project 30×104
13 2013 Zhaoqing CPC natural gas company LNG plant 60×104
14 2006 China Petroleum natural gas treatment plant to take off the hydrocarbon technology renovation project 50×104
15 2008 Shanxi energy CBM liquefaction project put into production, operation and management 30×104
16 2010 China natural gas corporation limited dengkou LNG production startup and operation project 30×104
17 2011 Xinjiang Borui LNG production, startup and operation project 30×104
18 2011 China natural gas corporation limited Ansai LNG project put into production, startup and operation project driving 200×104
19 2012 China natural gas corporation limited Bazhou LNG project 100×104
20 2013 Shandong taian 600000 tons/year LNG equipment localization project 260×104

Shipping & Delivery

The transportation of large equipment, such as the air separation unit, PSA gas plant, and the CO2 recovery plant, has always been a concern of overseas customers. The unloading and lifting must be careful. How to reduce extra handling fees is also one of the issues to be taken into consideration.

We can provide you with a worry free delivery:
1. We maintain long-term cooperation with some partner forwarders. So we can:
a. tell the accurate shipping date and quote the best shipping rates
b. book appropriate cargo space and choose the best shipping method: container, roll-on-roll-off ship, open top container or bulk carrier
c. make appointment for commodity inspection, arrange shipment, and prepare necessary documents for customs clearance

2. We have our own private wharf. Even 300m3 pressure vessels can be loaded within the factory and sent to Shanghai port.

3. We are quite experienced in loading and fixing containers, protecting the cargo from any possible damage on the way. The cargos will be in perfect condition upon the arrival at the destination.

4. The bulk ship and roll-on-roll-off ship are for the delivery of large and bulky cargos. The destination port may not be equipped with large cranes, and at somewhere the lifting charges are quite expensive. Taking these factors into consideration, we will choose ships equipped with cranes to reduce costs for customers. Our forwarder will arrange appropriate crane lifting and attach the cargo to the deck or cabin.

5. We will track the delivery until you receive the cargo.

6. The vast majority of customers receive cargos intact, but there is still likeliness of slight painting scratches. In this occasion, we suggest customers to fix the paint on their own if necessary. In addition, customers may purchase transport insurance to further reduce the risk of cargo damage.