COMPRESORES DE TORNILLO KOBELCO
Kobelco Screw Compressors Figure 1. shows the typical construction of Kobelco oil-free and oil-injected screw compressors in process gas applications.
Oil-free Screw
Oil-injected Screw Figure 1. Typical Construction
Slide Valve Figure 2. shows the built-in slide valve, which automatically increases and decreases the actual suction volume. Brake horsepower therefore increases and decreases according to capacity, resulting in improved energy efficiency. T he Oil-Injected Screw Compressor has a unique feature of tremendous power savings in cases of (a) turn down operation and/or (b) suction gas pressure fluctuation.
Figure 2. Slide Valve Control System
Screw Compressors > Oil-Free Screw Gas Compressors > Oil-Injected Screw Gas Compressors >
Screw Compressors
Ask Kobelco! The Best Solution for Any Gas Compression.
Kobelco offers oil-free and oilinjected screw gas compressors, as well as Advanced Dry Screw compressors that combine the benefits of both technologies. Kobelco screw compressors have the widest application range in the world. They also offer unmatched reliability, with typical units remaining in continuous operation (unspared). Kobelco screw compressors have capacity and pressure capabilities between those of centrifugal and reciprocating compressors. They handle inlet volume flows up to 3 142,000 m /h (84,000 cfm) and discharge pressures up to 100 barg (1,500 psig). They achieve positive displacement compression using two synchronized, helical rotors. They are smooth-running and are relatively compact. Kobelco screw compressors have proven to be an effective solution for the following processes:
Difficult gases (dirty, polymerforming, liquid-containing, corrosive) Gases containing entrained liquids Corrosive gases Process that fluctuate in molecular weight, pressures and flow rates Low molecular weight gases And more
With accumulated experience of more than 2,100 sets of oil-free screw compressors since 1955 and over 700 sets of oil-injected screw compressors since 1974, Kobelco has demonstrated expertise in applying screw compressors for a wide variety of heavy-duty process gas applications,
including oil & gas production, oil refining, petrochemical processing, steel manufacturing, general chemical and energy/power generation.
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Oil-Free Screw Gas Compressors
Ask Kobelco! The Best Solution for Any Gas Compression.
Kobelco oil-free screw gas compressors are designed to satisfy the latest API 619 (rotary-type positive displacement compressors for petroleum, chemical and gas industry services) requirements for service in heavy and continuous duties. They are intended to deliver years of continuous, uninterrupted operation.
Oil-free screw gas compressors are suitable for complex and dirty gas services, such as offshore vapor recovery, refinery flare gas recovery and petrochemical polymer forming gas. Kobelco supplies the most advanced oil-free screw gas com pressor, with the world's largest capability - up 3
to 142,000 m /hr (84,000 cfm). Kobelco oil-free screw gas compressors are contributing to environmental protection by recovering dirty gases that we re formerly flared to the atmosphere.
pplicable Range Inlet volume flow range: up to 142,000 m3/h (84,000 cfm) Discharge pressure: up to 45 barg (640 psig)
Key Advantages
Oil-free operation is great for handling corrosive gases Insensitive to changes in gas composition Easy to maintain
ny Gas Can Be Compressed
Kobelco oil-free screw compressors handle complex and dirty gases. Th ey can tolerate polymers formed in the casing or on rotors - unlike centrifugal or reciprocating compressors. Kobelco screw compressor rotors have rigid shafts and operate at lower speeds than the first lateral critical and are insensitive to vibration due to imbalance. Foreign matter sticking to the rotors after some duration of op eration even increases efficiency, due to decreased inter-lobe leaka ge. In some cases, water is injected to control discharge temperature or solvent is injected to soften and remove the polymer, which could otherwise become hard and adversely affect the compressor or process. Robust Design
API 619 Construction Kobelco oil-free screw compressors are designed to API619 standards. Reliable at High Temperatures Kobelco Oil-Free Screw compressors can handle high-temperature gas by the following unique designs: 1) Casing Cooling Jacket, which prevents thermal distortion 2) Internal Rotor Cooling, which maintains inter-lobe clearances at hi gh temperatures
