Petrochemical processes

Meeting exact specifications and the API code in the petrochemical industry.

Compressors serve processes such as LDPE, LLDPE, HDPE, PP, PTA, VCM. Typical roles are make up, recycle, Hydrogen feed, gas recovery, blanketing, utilities, conveyors, instrument and combustion air. Howden fans extract residual gases from process capacities, ensure building ventilation and aeration and room pressurization. Howden fans are  consistently selected to ensure reliable ventilation in crisis situations. 

Comprehensive, Customized Services

Important differences across projects, such as gas composition, process license and site requirements, make our ability to deliver custom-design solutions valuable.

Bespoke Packages

Our equipment delivers long-term heavy duty use. Howden‘s custom approach, based on a thorough analysis of all the factors involved provides a proven route to the right equipment for each unique set of circumstances.

In-House Expertise

Howden engineering teams and field engineers have access to our 160 years of knowledge, meaning we can offer our expertise at every step of the process from product selection to ongoing support. Our worldwide organisation provides local responsive support to end users and customers.

  • VCM Vynil Cholryde Monomer EDC Ethylene Dichloride Cracking

    In the VCM distillation section, the HCI gas is separated and fed through a recycle compressor to the oxy-chlorination unit to be converted into EDC.

    • Reciprocating Compressor, Peripheral
  • VCM EDC. Strip gas or Flare gas (Transfer or recycle)

    Compressors recover off gas streams that are to be flared. Howden supplies compressor packages API & ATEX, having designs compatible with corrosive gases.

    • Reciprocating Compressor, Diaphragm Compressor, Screw compressors
  • PVC. VCM Recovery

    Un-reacted VCM  from the polymerization reactor is pumped from the reactor and passed through a compressor prior to a condenser used to recover VCM

    • Oil Free Screw Compressor
  • BDO Process

    H2 gas compressor

    • Diaphragm Compressor
  • PP Polypropylene processes. Recycle

    Recycle compressor packages API & ATEX for the application.

    • Single stage blowers
  • PP Polypropylene processes. Pneumatic Conveying and pelletization

    Move bulk materials that are suspended in an air stream that is introduced by a positive pressure blower PD blowers in additive addition and pelletizing.

    • Single stage blowers, Roots Lobe Blower
  • PP Polypropylene processes. PRU Propylene Recovery Unit. Vent gas compressor

    Within the resin degassing section hydrocarbons are removed in a stripper (purge bin). Vent gas from this process can be recovered via a compressor.

    • Oil Injected Screw Compressor
  • PP Polypropylene processes. 1st reactor

    H2 recycle compressors.

    • Reciprocating Compressor, Peripheral
  • PP Polypropylene processes. 2nd reactor

    H2 recycle compressors.

    • Reciprocating Compressor, Peripheral
  • Phenol. Recycle compressor

    Unreacted gas recycling compressor.

    • Diaphragm Compressor
  • Phenol/ Oxidation air

    Phenol production via cumene  involves oxidising cumene with air to form hydroperoxide which in then mixed with sulphuric acid to produce phenol. Blowers provide the oxidition air.

    • Centrifugal Blower
  • AN Acrylonitrile/Off gas

    Within the acrylonitrile production process off gas from the absorbers can be recovered via a compressor.

    • Oil Free Screw Compressor
  • AN Acrylonitrile/HCN cooling

    HCN (hydrogen cyanide) is a by-product of acrylonitrile production and is passed through a condensing system which requires refrigeration and refrigerant compressors.

    • Oil Injected Screw Compressor
  • PO Propylene oxide/Vacuum gas

    PO purification systems can incorporate a vacuum stripper using compressors.

    • Oil Free Screw Compressor
  • Butadiene Reactor feed and overhead gas recycle

    Cracked C4 streams are quenched and compressed prior to scrubbing, dehydration and distillation.  Degassing within the distillation section can also include compression of overheads for recycling.

    • Oil Free Screw Compressor
  • Isobutylene production

    Process H2 compressor

    • Single Shaft Multistage Horizontally Split
  • Butadiene. Butadiene Off loading C4H6

    Liquid product transfer to rail or truck mounted tanks. Compressed gas push liquids

    • Reciprocating Compressor
  • PS Polystyrene

    N2+Co Compressor.

    • Reciprocating Compressor, Vertical Reciprocating
  • PTA. H2 Booster

    Compressors deliver high pressure hydrogen into the hydrogenation reactor. Diaphragm compressor insulated compression chamber ensures H2 purity preservation.

    • Diaphragm Compressor
  • PTA. Vent compressor

    Vent compressor to recover and liquefy harmful gases instead of being vented.

    • Reciprocating Compressor, Peripheral
  • PTA. N2 Blanketing Compressor

    N2 gas supply for process blanketing with inert gas.

    • Reciprocating Compressor, Vertical Reciprocating
  • Xylene Isomers injection compressor

    Within xylene isomerization, the isomerate is distilled in a deheptanizer from which hydrogen is recycled through a compressor to the process.

    • Oil Free Screw Compressor
  • Site utilities/N2 service

    Delivery of pressurised nitrogen for site process needs. Dry compression ensure gas purity preservation.

    • Reciprocating Compressor, Vertical Reciprocating
  • Site utilities/Buildings. Aeration, Ventilation

    At emergency evacuation points, axial and centrifugal fans provide reliable ventilation in crisis situations. Living quarters overpressure to protect rooms and staircases from hazardous fumes.

    • Centrifugal fans, Axial fans
  • Site utilities/Air instrument and process air

    Dry compression solutions.

    • Reciprocating Compressor, Vertical Reciprocating
  • Site utilities/Electricity-Fuel gas

    Onsite power is often generated using gas turbines.  Modern turbines have increasing high pressure feed gas requirements designed to optimise power output.  As available gas pressure is commonly lower than required it is boosted through a compressor prior to the turbine combustion chamber.

    • Oil injected screw compressors, Reciprocating Compressor, Centrifugal compressors
  • Site utilities/WWTP Waste water treatment

    Treating contaminants such are petroleum hydrocarbons, ammonia, and organic sulfur. For mechanical system or diffused aeration system, air supply is needed into the diffuser.

    • Single stage blowers
  • Site utilities/Cooling towers

    Low noise, high efficiency fans for cooling towers.

    • Axial Fans, Packaged solution fan
  • Site utilities/Ventilation & Aeration

    At emergency evacuation points, axial and centrifugal fans provide reliable ventilation in crisis situations. Living quarters overpressure to protect rooms and staircases from hazardous fumes.

    • Centrifugal fans, Axial fans
  • Process Support/Flare gas recovery

    Off gas streams recovery.  Recover off gas streams that are to be flared. Mainly by compression of corrosive gases.  Compression solutions are delivered with compatible materials and protection level according area classification.

    • Reciprocating Compressor, Diaphragm Compressor, Screw Compressors
  • Process Support/Extractions from capacities and reactors

    Furnace and fired heater fans. Residual gas exhaust fans. Explosive gas exhaust ATEX fans.

    • Centrifugal Fans
  • Process Support/ fans

    Fans for contaminated gas incinerators, thermal oxidizers, aeration, cooling towers and living quarters overpressure preventing rooms and staircases from hazardous fumes contamination, keeping safe environments free from the risk of explosive and hazardous gases.

    • Centrifugal fans, Axial fans
  • Process Support/Pneumatic Conveying

    Move bulk materials that are suspended in an air stream that is introduced by a positive pressure blower.

    • Roots Lobe Blowers
  • Process refrigeration

    Refrigeration compressor (Propane).

    • Single Shaft Multistage Horizontally Split
  • Air Separation Unit

    Large ASU Oxygen and air compressor.

    • Single Shaft Multistage Horizontally Split
  • Process Support/Combustion of waste gas

    Incineration air blower

    • Roots Lobe Blowers
  • HDPE-LLDPE Purification Process

    Linear Low Density Polyethylene. H2 Service compressor

    • Screw compressors
  • Ethylene storage/Refrigeration Compressor

    Tank boil-off gas vapors will be recompressed and recovered to storage via a reliquefaction system or potentially supplied to the plant for other processes.

    • Screw compressors, Reciprocating Compressor
  • LDPE/Primary Compressor

    Ethylene is passed through the primary reciprocal compressor

    • Reciprocating Compressor
  • LDPE/Process Vent gas compressor

    Resin leaves the reactor into a discharging system where unreacted materials are separated from resin then compressed via a vent recovery compressor before being cooled and re-entering the loop.

    • Oil Free Screw Compressor
  • HDPE-LLDPE Make up compressor

    HDPE-LLDPE Linear Low Density Polyethylene. Ethylene make up compressor package API & ATEX

    • Reciprocating Compressor, Peripheral
  • HDPE-LLDPE N2 service

    HDPE-LLDPE Linear Low Density Polyethylene. N2 Service compressor for polymerization process.

    • Reciprocating Compressor, Vertical Reciprocating
  • EO-EG Ethylene Oxide-Ethylene Glycol Reactor feed

    Ethylene Oxide-Ethylene Glycol (EO-EG). Ethylene gas make-up compressor for reactor feed.

    • Reciprocating Compressor
  • EDC/ HCI refrigeration

    HCI that is vented from the oxy-chlorination reactor can be sent through a refrigerated condenser for recovery.  Process requires refrigerant compressors.

    • Oil Injected Screw Compressor
  • If you would like to submit an enquiry please get in touch.

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    General enquiries: 

    Nick McLeanwebenquiries@howden.com+44 141 885 7500

    Parts & Service

    Lifetime Support

    Our lifelong aftercare service will supply original replacement parts, support you with maintenance and installation, and even train your own engineers in maintenance techniques. We keep detailed plant records almost indefinitely, and regularly supply spare parts for machinery over 50 years old.