Hot-dip galvanizing protective nitrogen gas generator

Product Description
Product Application
PSA nitrogen production
Pressure swing adsorption gas separation technology is an important branch of non-cryogenic gas separation technology. PSA uses air as the raw material and carbon molecular sieve as the adsorbent. Using the principle of pressure swing adsorption, the selective adsorption of O2 and N2 by carbon molecular sieve is used to achieve the separation of oxygen and nitrogen to obtain nitrogen.

Compared with cryogenic nitrogen production, PSA nitrogen production has significant characteristics. Adsorption is performed at normal temperature without involving adiabatic problems. The process is simple, the device is compact, the operation and maintenance are simple, the startup is fast, and the gas production is fast (15 ~ 30min). The nitrogen purity of the product can be arbitrarily adjusted according to process requirements, and it has obvious advantages for hot-dip galvanizing that requires continuous supply of protective gas.

Compressed air is used as the raw material for nitrogen production. Because piston air compressors are noisy and need frequentmaintenance, screw air compressors should be used.
Carbon molecular sieve is the key of nitrogen generator. The carbon molecular sieve we choose has excellent adsorption performance and the cost is not high.
Valves are also the key to nitrogen generators. They require fast switching speeds, good airtightness, and long life. Generally, the valve switching life is required to be more than one million times. In fact, our valves can be used for several years and are very reliable.

The structure of the adsorption tower (including the diameter-to-height ratio), air distribution, and the way of packing and
compacting the carbon molecular sieve also greatly affect the performance of the nitrogen generator. The compacting of the carbon molecular sieve and the control of the gas flow rate are very important, otherwise frequent pressure changes in the adsorption tower will cause the carbon molecular sieve to move, wear quickly and become powder and useless.

The valve switching is automatically controlled by PLC programmable controller, and the working cycle can be adjusted according to the performance and process requirements of the carbon molecular sieve.
In order to ensure the long-term continuous production of galvanized lines, the configuration of the nitrogen generators adopts the scheme of two uses and one preparation or one use and one preparation.

Nitrogen purification device
The protection gas for hot galvanizing requires high purity. A nitrogen purification device is equipped with a pressure swing adsorption nitrogen generator, which is catalyzed by hydrogenation.
The method of oxygen and adsorption drying is simple and reliable, and the purification effect is good. It is easy to reduce the impurity oxygen in nitrogen to less than 1 ppm and the dew point to below -60°C. Its purity exceeds the cryogenic air separation.

In order to meet the requirements of galvanized wire, the following optimization measures are taken:
The nitrogen purification device uses a high-efficiency palladium catalyst, which can purify the nitrogen purity from 99.5% to more than 99.9999%.
The nitrogen purification device adopts a hydrogenation catalytic deoxidation method. For the addition of hydrogen, low-pressure ammonia decomposition should be used, and the working pressure of nitrogen purification should be increased by 0.5 to 0.7MPa through hydrogen pressurization.

Water vapor has a strong oxidizing property in the high temperature furnace, so the moisture in the protective gas should be fully removed.

The nitrogen purification device is equipped with trace oxygen, trace water, and nitrogen-to-hydrogen analyzers to monitor
nitrogen purity online. In addition, the valve switching and regeneration temperature control of the entire system can be
automatically operated using a PLC programmable controller.

SPECIFICATIONS FOR PNM SERIES N2 GENERATOR



Specification
Flow rate
Nm3/hr
600
Purity
%
99.995
Outlet pressure
bar
6
Main Features
Siemens PLC full automatic controlled operation;
Siemens Smart 700 touch screen human machine interface;
Nitrogen purity, flow rate, pressure display from field instrument. Remote display, monitoring optional, not included;
Manual emergency shutdown push button for emergent stop;
Maintenance reminding, failure analysis, operation tracing functions;
With functions of system failure alarm, purity low alarm.
Unqualified nitrogen automatic discharge function optional, not included;
Designed for more than 8000 hours annual operation;

Certifications
Detailed Images
Name: Carbon molecular sieve 
Brand: Kuraray, Takeda,Qiangma
Original: Japan, China


For different flow rate and purity, for different customer considerations, the most suitable CMS are used for each nitrogen generator to achieve lower investment cost and lower operation cost.

High reliability
Proven PSA technologies such as big flange structure, snowstorm filling, gas distribution system, gas speed control technology, unequal pressure balance system,etc make Gamma Gas nitrogen generator more reliable than many other suppliers.

Name: Pneumatic valves 
Brand: Bray, Burkert, Omal 
Original: USA,Germany, Italy 
International famous brand pneumatic valves ensure long time operation reliability. Lifetime of these parts are more than 10 years

Easy installation


Skid structure, fully assembled and test qualified before delivery. When machine reaches site, with simple connection of power supply and gas pipeline, the machine is ready for operation. No need to disassemble and/or re-assembly at site.

Domestic famous engines, strong driving force, low fuel consumption, high economic benefits 12F+4R sliding sleeve shift.

Our Service
Pre-Sales Service
* Inquiry and consulting support. 
* Solution providing. 
* View our Factory.
After-Sales Service

* Training how to instal the machine, training how to use the machine. 
* Engineers available to service machinery overseas.
Packing & Delivery
Packaging
Size
1530 (L) * 1560 (W) * 1400 (D)mm
Weight
1.2 T






Packaging Details
The normal package is plywood box. For machines height more than 2.5m, waterproof covers will be used for open top container delivery.
Packaging
Size
1530 (L) * 1560 (W) * 1400 (D)mm
Weight
1.2 T






Packaging Details
The normal package is plywood box. For machines height more than 2.5m, waterproof covers will be used for open top container delivery.
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