REFINERY GAS UPGRADING: LPG AND H₂ RECOVERY FROM FUEL/WASTE/FLARE STREAMS

Problem

Recovery of heavy hydrocarbons (C₃₊) or LPG from refinery purge and fuel gas streams is more profitable than sending these high-value components to fuel. LPG components are produced in many refinery operations. Traditionally, absorption and cryogenic systems have been used for the recovery of LPG. However, these technologies require numerous moving parts and/or external chemicals, and have high capital and operating costs. VaporSep offers a simple alternative for recovering LPG from refinery waste streams.

VaporSep^® Solution

VaporSep unit for LPG recovery from refinery streams using two different membranes
– the first membrane permeates hydrogen whereas the second one permeates LPG

The flow diagram above shows how MTR’s two different membrane types can be combined to recover LPG and hydrogen from fuel gas. The first membrane, VaporSep-H₂™, permeates purified hydrogen from the fuel gas. The gas is then passed to a VaporSep™ membrane which preferentially permeates LPG components. The permeate is compressed and LPG is recovered as a liquid in the condenser.

Benefits

This VaporSep unit recovers hydrocarbons from offgas

Efficient and economical hydrocarbon recovery: typically 60% to 90% recovery of feed LPG recovery as an easy to handle liquid
Reduces flaring and corrects refinery fuel balance
Recovery of purified hydrogen can be an added benefit
Proven performance: dozens of references for both hydrocarbon and hydrogen membranes
Long membrane life

Simple, reliable, flexible unit; easy to install and operate

Operates at moderate temperatures and pressures
Simple installation and operation with compact skid-mounted construction
Requires no additional chemicals; produces no wastes

Application Areas

Refinery fuel/flare gas
Catalytic reformer net gas
Pressure swing adsorption (PSA) tail gas
Fluidized cat cracker (FCC) main column overhead gas
Aromatics plant purge and vent gases
Steam methane reformer feed gas
H₂ membrane tail gas

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产品名称：炼厂气升级膜分离解决方案