Flare & Vapour Recovery Ejector
Flare Recovery Ejectors are essentially Gas Ejectors or Liquid Ejectors that operate on the basis of the jet Venturi principle. During operation Flare Recovery Ejectors are able to create a pressure differential across its inlet and outlet openings. Flare recovery ejector utilize the energy in process gases / pumped liquids to create this pressure differential. This enables Flare Recovery Ejectors to be used for creating vacuum / low pressure at its inlet. The low pressure allows the Flare Recovery Ejector to suck flared gas through its inlet. The pressure of the sucked flare gas increases inside the ejector and eventually it is discharged at a higher pressure from the outlet. The discharge contains the mixture of process Gas & the sucked Flare gas or Liquid & sucked flare gas.
Flare gases are a combination of raw natural gas, vapours generated from crude oil tanks and other gas generated during oil & gas production and refining. Flare gases are typically at atmospheric pressures or & sour in nature. Sour service presents a risk of corrosion and hence requires special materials of construction. That combined with availability at low pressures makes recovery of flare gas difficult.
Hence traditionally these gases were typically burnt in flare stacks. But as per new industrial regulations flare gas burning is discouraged to avoid pollution and release of greenhouse gases. Also flare gases if recovered are a significant source of Natural gas.The ability of Flare Recovery Ejectors to suck and compress Flare gases make its it an important part in the flare recovery process. Additionally Vapour recovery Ejector can be manufactured in multiple material combinations to ensure compatibility with sour service.
Typical Applications
- For Vapour recovery from Crude Oil Storage
- For Flare Gas Recovery
- As a Natural Gas Compressor
- As a Flare Gas Compressor
Features Of Vapour recovery Ejector
- Custom designed models – ensures perfect fit for your application.
- Multiple Stages can be combined to create high compression ratios
- Availability in multiple type of end connections – Flanged, Threaded
- Compliant with NACE MR 0175 material standards
- Complaint with NACE MR 0103 material standards
- Available with U-Stamp , CE marking certification
- Available in a large variety of materials
| Metallic | Non Metallic |
|---|---|
| Carbon Steel | PP (Poly-propylene) |
| Stainless Steels SS 304 / SS 316 | PTFE (Poly-tetra-fluoro-ethylene) |
| Duplex & Super Duplex Stainless Steel | |
| Exotic metals (Hastelloy, Inconel, Titanium) |
Benefits Of Flare & Vapour Recovery Ejector
- Static Device without any moving parts – ensure long reliability and maintenance free operation.
- Use Process gas ejector as energy input / fuel – Process Gas are readily available in most Oil & Flare Recovery Industries & refineries, hence no additional infrastructure needed for operation.
- Use pumped liquids or pumped water as energy input / fuel – Water at high pressure in form of injection water is commonly available in most Oil productions sites, hence no additional infrastructure needed for operation.
- Tolerate entry of liquids & solids particles into the ejector – avoids abrupt breakdowns.
- Manufactured in multiple materials – allows using the most cost-effective & chemically compliant materials for the application.
- Non sparking operation – can be safely used in hazardous & flammable areas
Frequently asked questions (FAQs) about Flare Recovery Ejectors:
A flare recovery ejector is a device used to safely collect and recover useful gases from flare stacks. The Ejector pressurizes the recovered gas and injects it back into the gas headers thus avoiding its flaring.
A flare recovery ejector works on the principle of using a high-pressure motive gas (typically fuel gas) to create a low-pressure zone that entrains gases from the flare headers. This entrained gas then mixes with the motive gas and pressurizes the gas mixture.
Flare recovery ejectors are primarily used in oil refineries, chemical plants, gas processing facilities, and other industrial sites where flammable gases need controlled disposal to recover useful gases, prevent environmental pollution and ensure safety
Flaring of gases leads to wastage of useful gases, causes environmental pollution and also leads to global warming. Recovery of this flare gas helps in avoiding pollution and also helps in contributing to revenue by utilizing the recovered gas.
Flare recovery ejectors require a source of high-pressure motive gas which adds to operational costs. They may also have limitations in efficiency compared to compressor based flare gas recovery systems.
Factors such as flare gas flow rate, composition, and ambient conditions influence the sizing and operating pressures influence the sizing process.
Flare recovery ejectors generally require minimal maintenance due to their robust design and lack of moving parts. Regular inspection and cleaning of nozzles and diffusers is recommended to ensure optimal performance.
