a Small Liquid Nitrogen Generator Specifically Designed for Laboratories

• Customization: Available
• Application Fields: Chemical
• Certification: CE, ISO, RoHS
• Model NO.: LPLN-10
• Condition: New
• Noise Level: Low
• Parts: Gas Tank
• Purpose: Gas Storage
• Usage: Nitrogen, Oxygen
• Volum: Small
• Liquid Nitrogen Production Rate: Quick
• Temperature: -196
• Theory: Low Temperature Liquefied
• Function: Liquid Machine
• Name: Liquid Nitrogen Equipment
• Name1: Liquid Nitrogen Plant
• Purity: 95-99.999%
• Use: Nuclear Magnetic Resonance (Nmr)
• Use1: Cryopreservation of Bovine Sperm
• Use2: Laboratory Cryopreservation
• Machine Size: Medium
• Transport Package: Wooden Case
• Specification: as required
• Trademark: LDH
• Origin: China
• HS Code: 8419609090
• Production Capacity: 5000 Units/Year
• Package Size: 104.00cm * 77.00cm * 200.00cm
• Package Gross Weight: 350.000kg

Product Description

 

Basic Info.

 

product	Liquid Nitrogen Generator	Trademark	Skid Mounted
Gas	N2	Purity	99%-99.999%
Noise Level	Low	voltage	220V
certification	ISO, CE, ISO1400/18001	manufacturer	china
Application	Industry / Agriculture / Livestock / Food / Medical / Electronic	trade mark	LDH
Transport Package	Pre-Packing	working temperature	5-45ºC

products information

Working Principle of Liquid Nitrogen Generator
The LDH nitrogen liquefier produces liquid nitrogen through cryogenic refrigeration. High-purity nitrogen (typically ≥99.99%) is first generated via pressure swing adsorption (PSA) or membrane separation, which selectively removes oxygen, moisture, and other impurities from ambient air using carbon molecular sieve (CMS) or polymeric membranes.

 

The liquefaction process employs a mixed refrigerant cycle or pulse tube refrigerator to cool nitrogen to its boiling point of -196°C. This cryogenic system integrates heat exchangers, expansion valves, and compressors to achieve continuous liquefaction. PSA technology, a cornerstone of industrial gas separation, relies on CMS adsorbents to preferentially adsorb oxygen and other trace gases under pressure, releasing purified nitrogen for subsequent liquefaction.

Principle of nitrogen liquefier

The nitrogen liquefier consists of a compression unit and a cold box unit. The compression unit features two single-stage oil-lubricated compressors with associated oil separators and air/water-cooled condensers. The cold box unit mainly includes a pre-cooling heat exchanger, a separator, and a main cooling heat exchanger. The separator removes high-boiling working fluids to prevent lubricating oil or other contaminants from entering the cryogenic heat exchanger pipelines, thus avoiding blockages. Nitrogen is liquefied into a subcooled state via the main heat exchanger, then throttled through an LN2 throttle valve into a dewar for storage. Boil-off gas (BOG) is vented to the atmosphere.

Our Advantages

aseptic filtration

Compressed air through the screw air compressor, after cold dry suction dry filtration, into the PSA nitrogen machine, through the sterilization filter to generate dew point-60 °C sterile nitrogen.

Carbon molecular sieve adsorption

Using carbon molecular sieve as adsorbent, using the difference of adsorption amount of oxygen and nitrogen molecules in compressed air in molecular sieve, the gas separation equipment of product nitrogen is directly prepared from compressed air by the principle of pressurized adsorption and depressurization desorption.

high efficient and energy-saving

Fast and stable on-site product nitrogen production, the shortest in 10 ~ 20 minutes to produce qualified nitrogen. The use of more efficient and stable molecular sieves and the use of unique PSA energy-saving technology have lower energy consumption.

Product Parameters

Model	LPLN-3	LPLN-5	LPLN-10-W	LPLN-20-W		LPLN-40-W
Liquid nitrogen production (L/day)	80	120	240	500	720	1000	1200
Liquid nitrogen production (L/h)	3	5	10	20	30	40	50
Installed power(kW)	8	9	11	25	25	35	35
Type(AC V)	380/50Hz	380/50Hz	380/50Hz	380/50Hz	380/50Hz	380/50Hz	380/50Hz
Cooling form	Air  cold	Air  cold	Water cold	Water cold	Water cold	Water cold	Water cold

model	LPLN-10	LPLN-20	LPLN-40	LPLN-80	LPLN-120	LPLN-240	LPLN-480
	all-in-one machine				separated type
output	0.3-0.4L/H	0.8-1L/H	1.6-2L/H	3L/H	5L/H	10L/H	20L/H
	8-10L/day	20-24L/day	40-50L/day	72L/day	120L/day	240L/day	480L/day
purity	≥99%				≥99%
voltage-to-frequency	220VAC 1P 50Hz		380VAC 3P 50Hz 220VAC 1P 50Hz
Power ( KW )	2	4.5	7.5	12.5	15	27	45
Area ( m2 )	1	1.5	3	3.5	3.5	10	30
Equipment Size (MM)	750*650*1500	1150*850*2000	1250*2000*2000	1250*2000*2000	1250*2000*2000	6000*1100*2200	8000*1700*2300
Occupying an area  of (m2)	>5	>6	>10	>15	>15	>30	>50
Container size						20-foot cabinet	40 feet high cabinet  9.6 meters long
Environmental  temperature  requirements	0-30ºC proper ventilation					0-35ºC proper ventilation
One meter noise(Db)	<65Db	<65Db	<65Db	<65Db	<65Db	<72Db	<78Db
cooling type	wind cooling	wind cooling	wind cooling	wind cooling	wind cooling	water cooling	water cooling
cooling water volume (m³/h)						>4	>8
nitrogen amount (m³/h)	1	2	4	6	8	15	30
nitrogen dew point (ºC)	-60ºC
nitrogen pressure (Mpa)	0.8
Liquid nitrogen tank  proposal(L)	30	50	100	175	300	500	1000
miscellaneous	Non-standard voltage frequency, altitude > 1000 meters, purity ≥ 99.9, need to be customized ;  equipment above 100L / h is customized according to the customer 's site conditions.

 

industry application

Application of liquid nitrogen machine

1. Food Industry:
Liquid nitrogen machines are used for rapid freezing of food items such as seafood, meats, and vegetables, swiftly locking in freshness and nutrients while minimizing ice crystal formation, thereby preserving texture and flavor. Additionally, they are employed in the creation of liquid nitrogen ice cream and molecular gastronomy, offering unique culinary experiences.

2. Healthcare:
In the medical field, liquid nitrogen generated by these machines is used for long-term preservation of biological samples like cell lines, blood, and tissue samples, maintaining their viability and stability. It also finds application in cryotherapy during surgical procedures, removing warts, skin lesions, and in reproductive medicine for sperm and egg freezing.

3. Metalworking:
In metal casting, welding, and cutting processes, liquid nitrogen machines are utilized to rapidly cool metal surfaces, reducing thermal deformation and cracking, enhancing the strength and precision of metal components.

4. Chemicals & Pharmaceuticals:
In the chemical and pharmaceutical sectors, liquid nitrogen serves as an inert protective gas, preventing material oxidation and maintaining an inert production environment to ensure product quality and safety. It is further employed in the low-temperature synthesis and crystallization processes of certain products.

5. Electronics & Semiconductors:
In electronics and semiconductor manufacturing, the cold environment provided by liquid nitrogen machines is used in material processing, packaging, and testing of electronic components, improving product performance and stability.

6. Scientific Research & Laboratories:
Liquid nitrogen is used in laboratories for cryogenic experiments, sample freezing, and preservation, such as in cell cultures, DNA extraction, protein crystallization, and physical experiments requiring extreme low temperatures.

7. Oil & Gas Extraction:
In the oil and gas industry, liquid nitrogen is used to enhance recovery rates through injection, increasing underground pressure to improve fluid flow, and also in drilling processes for cooling and cleaning.

8. Environmental Remediation:
In environmental management, liquid nitrogen is employed in soil and groundwater pollution control, solidifying pollutants through cryogenic techniques for easier excavation and treatment.

9. Beauty Industry:
In the beauty sector, liquid nitrogen is used in cryotherapy treatments for removing skin imperfections, tightening skin, reducing inflammation, and in certain non-invasive cosmetic procedures as a cooling medium.

10. Entertainment & Celebrations:
In entertainment and event celebrations, liquid nitrogen is utilized to create stage effects such as smoke, adding visual drama and spectacle.
 

Company Profile

 

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