Technology

Maintenance compressed air system

01/01/2019

The maintenance compressed air systems are often specified in the system documentation, provided by the manufacturer. In this artical we would like to introduce some rules and maintenance regimes according to general regulation.

Schedule Operation of GRH3 air compressor

29/07/2019

Schedule Operation of GRH3 air compressor

Electric wiring and Power Facilities of GRH3 air compressor

29/07/2019

Electric wiring and Power Facilities of GRH3 air compressor

Guide of air filter maintenance

02/01/2019

Compressed air system in factory plays an important role. In order to ensure the stable operation during the manufacturing process, the regulary maintenance is nescessary . However, there are many different problems in fact such as: Air compressors, dusty air dryers, high engine room temperatures, unsecured wind convection ... lead to reduce using time of compressor accessories (air filter, oil filter, oil separator ...). On the other hand, the recommended maintenance in some factories is not seriously followed and there are deviations. To extend the life of the machine as well as compressor components and ensure operator safety Air compressors are very important to maintain regularly and technically correct.Air compressors, dusty air dryers, high engine room temperatures, unsecured wind convection ... lead to reduced use time of compressor accessories (air filter, loc oil, oil separator ...). On the other hand, the maintenance (maintenance) recommended by the manufacturer in some factories is not guaranteed and there are deviated. To lengthen longevity of mạchine as well as compressor components and ensure operator safety , air compressors are very important to maintain regularly and technically .

Guidelines for inspection of Handsome II

31/07/2019

Inspection intervals and inspection items depend on the installation site as well as operating conditions. The table below provides the rough guidlines. Sound operation is expected if the guidelines are followed.

Desiccants for Absorption air dryer

Wednesday - 26/12/2018 23:07

1. Activated alumina

Activated alumina/Desiccant beads have a white, spherical, non-toxic, odorless, insoluble in water and alcohol. They are able to stand out thermal shock and abrasion with highly mechanical stability and strong absorption (impervious). The particle shape does not expand or crack after absorbing.

Activated aluminum is used in heatless dryer systems to create a continuous supply of dry air with moisture better than -70 ° C dew point. Remove acid and other types of transformer oils, lubricants and refrigerants to form degraded acids when used. Activated aluminum will remove the corrosive acid thus protecting valuable equipment: Particle size: 3-5mm, 4-6mm, 5-7mm

Hạt hút ẩm / Activated alumina

Property	Unit	Bead
Diameter	Mm (Ins)	3-5 (1/8”)	4-6 (3/16”)	5-7 (1/4”)
Static Water Adsorption	%wt	16-18 (@60% RH 25
Bulk Density	g/cc	0.68-0.75	0.65-0.72	0.62-0.68
Surface Area	m²/g	300-360
Pore Volume	cm²/g	0.38-0.42
Loss On Attrition	%wt	≤ 0.4
Crush Strength	N	≥ 120	≥ 130	≥ 150

2. Molecular Sieve

is the synthetic crystallization of zeolites, in which atoms are arranged in a certain pattern. Inside, the structure has many holes linked by smaller-sized niches to form molecules. The molecule can absorb about 20% of the weight of water before the relative humidity of the surrounding air increases. These characteristics allow the molecule to maintain very low dew points (-50 ° C 10% by weight of absorbed water). The material is also capable of rapidly absorbing water vapor and maintaining high adsorption efficiency at high temperatures up to 90 ° C.

Property	Unit	Bead		Pellet
Diameter	Mm (Ins)	1.6-2.5 (8x12 mesh)	3-5 (8x12 mesh)	1/16”	1/8”
Static Water Adsorption	%wt	≥ 26	≥ 26	≥ 26	≥ 26
Static CO₂Â Adsorption	%wt	≥ 17.5	≥ 17.5	≥ 17.5	≥ 17.5
Bulk Density	g/cc	≥ 0.62	≥ 0.62	≥ 0.62	≥ 0.62
Loss On Ignition	%wt	≤ 1.50	≤ 1.50	≤ 1.50	≤ 1.50
Loss On Attrition	%wt	≤ 0.10	≤ 0.10	≤ 0.20	≤ 0.20
Crush Strength	N	≥ 30	≥ 80	≥ 30	≥ 7

3. Some application of Desiccant beads(Activated alumina)

Activated alumina is widely used, it is an effective absorber in gases such as acetylene, methane, oxygen along with liquids such as Benzene, Freon, hydraulic oil, Kerosene, transformẻ and vegetable oils.

3.1 Catalyst application

Activated aluminum is used for a wide range of adsorbent and catalytic applications including absorption of catalysts in the production of polyethylene, in the production of hydrogen peroxide, as a selective adsorbent for Many chemicals include arsenic, fluoride, in removing sulfur from the gas stream (Claus Catalyst process)

3.2 Absorbing

Used as a desiccant, it works by a process called adsorption. The water in the air actually sticks to the main alumina in the middle of the small segments, when the air passes through them. Water molecules are stuck so that air is dried out as it passes through the filt This process is reversible. If the alumina desiccant is heated to ~ 200 ° C, it will release clogged water. This process is called regeneration of desiccants.

3.3 Fluoride adsorbent
Activated alumina is also widely used to remove fluoride from drinking water. In the United States, there are extensive fluoride programs for drinking water. However, in certain areas, such as India's Jaipur area, there is enough fluoride in the water to cause fluorosis. The new aluminum filter can easily reduce fluorine concentration from 0.5 ppm to below 0.1 ppm

3.4 Vacuum system

In the vacuum system, activated aluminum is used as a charge material in the fore-line trap to prevent the oil from being generated by the vane pump from the rear spill into the system.

3.5 Biological materials

Its mechanical features and non-reactivity in the biological environment allow it to be a suitable material used to cover friction surfaces in body prostheses.