Beijing LIdaheng Technology Development Co., Ltd. is a high-tech enterprise specializing in the research, development, design, manufacturing, sales and service of all kinds of air separation equipment and low temperature application equipment. The company has a number of national patent certificates, computer soft certificate, and passed the European CE certification and ISO9001 certification.
The company pays attention to scientific and technological innovation, cooperates with foreign counterparts, and exchanges and cooperation with many domestic research institutions, universities and colleges. Fully absorb domestic and foreign enterprises advanced design concept, strict management procedures and exquisite manufacturing technology. On the basis of sincere service support, bold use of new technology, new technology, enhance the company's product research and development, manufacturing and service capabilities, to energy saving, superior quality and diversification.
Through years of research and exploration in the gas industry, we always insist on providing high-quality products and professional services for customers in various industries. We adhere to the concept of serving global users with Chinese products, and use cloud technology to serve customers around the world more quickly and intuitively.
The company's products involve metallurgy, petrochemical, electronics, machinery, building materials, food, medicine, new materials and other fields. Products sell well all over the country, but also exported to Peru, Venezuela, Austria, Nicaragua, Iraq, India, Bangladesh, Pakistan, Philippines, Angola, Kazakhstan and other countries.
Physical properties
The diatomic character of the N2 molecule is retained after liquefaction. The weak van der Waals interaction between the N2 molecules results in little interatomic interaction, manifested in its very low boiling point.[1]
The temperature of liquid nitrogen can readily be reduced to its freezing point −210 °C (−346 °F; 63 K) by placing it in a vacuum chamber pumped by a vacuum pump. Liquid nitrogen's efficiency as a coolant is limited by the fact that it boils immediately on contact with a warmer object, enveloping the object in an insulating layer of nitrogen gas bubbles. This effect, known as the Leidenfrost effect, occurs when any liquid comes in contact with a surface which is significantly hotter than its boiling point. Faster cooling may be obtained by plunging an object into a slush of liquid and solid nitrogen rather than liquid nitrogen alone.
Handling
As a cryogenic fluid that rapidly freezes living tissue, its handling and storage require thermal insulation. It can be stored and transported in vacuum flasks, the temperature being held constant at 77 K by slow boiling of the liquid. Depending on the size and design, the holding time of vacuum flasks ranges from a few hours to a few weeks. The development of pressurised super-insulated vacuum vessels has enabled liquid nitrogen to be stored and transported over longer time periods with losses reduced to 2% per day or less.
Uses
Liquid nitrogen is a compact and readily transported source of dry nitrogen gas, as it does not require pressurization. Further, its ability to maintain temperatures far below the freezing point of water makes it extremely useful in a wide range of applications, primarily as an open-cycle refrigerant, including:
- in cryotherapy for removing unsightly or potentially malignant skin lesions such as warts and actinic keratosis
- to store cells at low temperature for laboratory work
- in cryogenics
- in a cryophorus to demonstrate rapid freezing by evaporation
- as a backup nitrogen source in hypoxic air fire prevention systems
- as a source of very dry nitrogen gas
- for the immersion, freezing, and transportation of food products
- for the cryopreservation of blood, reproductive cells (sperm and egg), and other biological samples and materials
- to preserve tissue samples from surgical excisions for future studies
- to facilitate cryoconservation of animal genetic resources
- to freeze water and oil pipes in order to work on them in situations where a valve is not available to block fluid flow to the work area; this method is known as a cryogenic isolation
- for cryonic preservation in hopes of future reanimation
- to shrink-weld machinery parts together
- as a coolant
- for CCD cameras in astronomy
- for a high-temperature superconductor to a temperature sufficient to achieve superconductivity
- to maintain a low temperature around the primary liquid helium cooling system of high-field superconducting magnets used in e.g. nuclear magnetic resonance spectrometers and magnetic resonance imaging systems
- for vacuum pump traps and in controlled-evaporation processes in chemistry
- as a component of cooling baths used for very low temperature reactions in chemistry
- to increase the sensitivity of infrared homing seeker heads of missiles such as the Strela 3
- to temporarily shrink mechanical components during machine assembly and allow improved interference fits
- for computers and extreme overclocking
- for simulation of space background in vacuum chamber during spacecraft thermal testing
- in food preparation, such as for making ultra-smooth ice cream.[6] See also molecular gastronomy.
- in container inerting and pressurisation by injecting a controlled amount of liquid nitrogen just prior to sealing or capping
- as a cosmetic novelty giving a smoky, bubbling "cauldron effect" to drinks. See liquid nitrogen cocktail.
- as an energy storage medium
- in freeze branding cattle
Liquid Nitrogen Generator is the machine can produce liquid nitrogen .
The liquid can be into gas with low temp.
LDH liquid Nitrogen Generator has below features
1. Capacity from 3L/h to 50L/h. Meet all your requirements.
2. Low power consumption.
3. Automatic operate. One key start.
4. Small floor space.
5. Durable. Can work 24 hours per day.
6. One station of liquid nitrogen generator manufacture. ( we supply liquid nitrogen generator, vacuum tube and liquid nitrogen dewar.)
LDH Liquid nitrogen generator models and technical sheet:
| NO. |
LN80-A |
LN120-A |
LN240-W |
LN500-W |
LN720-W |
LN1000-W |
LN1200-W |
| Capacity(L/day) |
80 |
120 |
240 |
500 |
720 |
1000 |
1200 |
| Capacity (L/h) |
3 |
5 |
10 |
20 |
30 |
40 |
50 |
| Power(kW) |
8 |
9 |
11 |
20 |
25 |
35 |
40 |
| purity(99%~99.999%) |
99.9% |
99.9% |
99.9% |
99.9% |
99.9% |
99.9% |
99.9% |
| Outlet (MPaG) |
≥0.8 |
≥0.8 |
≥0.8 |
≥0.8 |
≥1.6 |
≥0.8 |
≥1.6 |
| Power supply |
380/50Hz |
380/50Hz |
380/50Hz |
380/50Hz |
380/50Hz |
380/50Hz |
380/50Hz |
| Cooling |
air |
air |
water |
water |
water |
water |
water |
| Water cooling(m3/h) |
- |
- |
≥4 |
≥8 |
≥12 |
≥15 |
≥20 |
LDH is one of the professional liquid nirogen generator manufacturer ,we can offer all modes of liquid nitrogen generators.
From 3L/hr to 50L/hr ,purity 95% to 99.999%
We can offer one full system also can offer the parts of equipment as your need.
Any need welcome contact us,get more information
LDH Liquid nitrogen generator drawing
Liquid nitrogen generator Working principle:
Mixed-refrigerant Joule-Thomson (MRJT) refrigerator at low temperature ranges driven by
single compressor with precooling is applied to liquefy nitrogen (-180ºC) for Nitrogen Liquefier
from TIPC, CAS. MRJT, a Joule-Thomson cycle based on reoccupation and multicomponent
mixed-refrigerants through optimizing various refrigerants with different boiling points
with a good match along with their respective efficient refrigeration temperature ranges,
is an efficient refrigerator for the temperature range from -40 to -196ºC.
The feature of this product is as following: the available mature commercial compressors
and heat exchanges, high liquefaction efficiency, high reliability, no maintenance and long life.
LHD LN2 Generatior applications
Mainly in universities, scientific research laboratories, the advantage is that the independent
production of liquid nitrogen, with the production, no need to go far to purchase liquid nitrogen dew-pot, improve the convenience of use.
Output is customized from 1 litre to 50 liters per hour. Depending on the user's usage.
Convenient compact, easy to move, low energy consumption.
During the use of the equipment, it can realize one-button startup and one-button shutdown with a high degree of automation. Generally, it can be achieved after simple training and does not require too much professional knowledge and skills.
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