1.11.002 Discharge/Receiver Vessel

This Policy is completed and waiting Field Service, Engineering, and EHSS approval.

Purpose

The purpose of this procedure is to establish the minimum requirements for understanding the internal components of the Discharge/Receiver vessel on Flogistix FX model units. The procedure applies to all Flogistix FX model units equipped with a Discharge/Receiver vessel.

Procedure

This procedure applies to all Flogistix FX model units that are equipped with a Discharge/Receiver vessel that is currently in service in the Field, Test Loop, at a Repair Shop, or in Storage Yards.

The Vessel that receives the mixed gas and injected oil from the Rotary Screw compression process is referred to as either the Discharge Vessel or Receiver Vessel. The compressed gas and oil that was injected into the compressor that became mixed during the compression process needs to be separated.

This gas and oil mixture is discharged out of the compressor and into the discharge/receiver vessel.

The FX model discharge/receiver vessel is designed as a vertical vessel. Flogistix has a few model vessels that were designed as a horizontal or "J" type vessel. Most Flogistix units have vertical designed receiver vessels.

The receiver vessel has two main functions;

It contains the oil reservoir for the compressor oil,

It separates the compressor oil from the compressed gas.

The example below is a visible 3D model of the FX model Discharge vessel.

The first stage for the oil and gas mixture when it enters the receiver vessel is the separation process of the oil.

The separation is done by arranging for the oil that is in large droplet form to return by gravity to the main oil reservoir in the bottom of the separator vessel.

At least 97% of the oil should be separated out this way.

As in this example of the vessel above, the oil and gas enters in the side of the vessel. Notice the inlet is not centered in the vessel.

When the oil and gas mixture enters in the side of the vessel it begins to swirl around the vessel. As shown in the example below

The bigger oil droplets will attach to the side of the vessel as the gas and oil mixture swirls inside the vessel, The oil droplets that attached to the sides of the vessel will run down the side of the vessel to the bottom.

This is the 97% of the oil that is separated by gravity.

The remaining 3% of the oil, is suspended oil that is in the gas flow as very small droplets or in vapor form.

This suspended oil and gas then travels up the center of the vessel into the upper section of the vessel where the coalescing element is located. (See Arrows in example below)

The Coalescing element is suspended in the upper chamber of the discharge vessel. It is held in place by the large flange at the top of the discharge vessel.

The gas with the suspended oil then starts to penetrate the coalescing element. Flogistix FX model designed vessels have the gas flowing from the outside of the coalescing element to the inside of the coalescing element.

For how the Coalesing Element works reference or refer to Field Service Wiki procedure 1.11.03 or the attached link: 1.11. 3 Coalescing Elements in Discharge/Receiver Vessels

As gas penetrates the coalesing element it then flows through it and continues to flow up and out the flange on the top of the Discharge vessel (As seen in the example above)

Oil that has gathered in the bottom of the vessel flows out the bottom of the vessel through a pipe connection and is re-injected into the compressor. Once the oil is re-injected into the compressor the oil starts the separation process again as explained above.

Receiver vessels have to be designed with all of the following factors: gas volume, oil GPM (gallons per minute), and discharge operating pressure.

The lower the discharge operating pressure, the larger the surface area needs to be for the coalescing element to work efficiently.

The coalescing element in most cases will last a long time. Due to some operating conditions and gas composition the life of the coalescing element maybe shortened.

The coalescing element has a micron rating of 0.3 microns. (For reference, a red blood cell is approximately 8 microns in size and a human hair is about 50 microns in diameter).

Coalescing element Failures:

If the coalescing element starts to plug up it can cause high differential pressure across the element. When the differential pressure gets too high across the element it can cause the element to collapse.

When the coalescing element starts to partially plug up it will create the same effect as having a smaller surface area of the media. If the surface area of the media is too small it can cause oil loss.

Blowing the unit down too fast can cause oil carry over.

When doing this the gas volume across the discharge element is greater than what the element is designed for.

A sudden drop in discharge pressure can cause the coalescing element to loose efficiency and carry oil over. If the discharge pressure is inconsistent and goes up and down it could cause oil loss,

A sudden rapid drop in pressure across the element could cause the element to collapse or partially collapse, This will lead to oil loss in the vessel.

Responsibilities

Management - Management is responsible for implementing, supporting, and enforcing the requirements of this procedure to their respective locations/area.

EHSS - Responsible to assist in the implementation of this procedure and to review for effectiveness.

Employees, Contractors, Vendors, ETC. - Are responsible to follow the requirements outlined in this procedure and ask for assistance

Scope

This procedure applies to all Flogistix FX model Discharge/Receiver vessel and are applicable to all Flogistix employees, contractors, and temporary employees.

Hazards

Employees should be aware that units could contain flammable and toxic gasses. Potential for the possible hazards of gas ignition or fire, hot surfaces & fluids, rotating equipment. Risk of possible concentration of H2S. Hazardous gases could be in the units pressure vessels, cooler, or associated piping and risk of inhalation of hazardous gas fumes.

Safety

All Personal Protective Equipment (PPE) for normal Field Mechanical duties apply for this procedure.

Four Gas Monitor, which is outlined in the Flogistix EHSS Manual, PPE Section 8, Procedure 8.3

This procedure applies to all units in service in the field, at a service shop, or in any storage yard.

Insure Flogistix personnel have proper safety certification or site orientation if required by the Flogistix Customer.

Insure Flogistix personnel adhere to all Customers safety practices.

Training

All employees shall be initially trained on the following topics:

• Employee Personal Protective Equipment (PPE)

• Lock Out Tag Out (LOTO) procedure according to Flogistix policy

• Emergency and First Aid procedures

• Methods and Observations that may be used to detect the presence or release of a hazardous chemicals or gas in the work place

Tools & Equipment Required

All employees performing this procedure shall be required to have the listed tools to perform job tasks:

• All required PPE according to Flogistix Safety Policy

Approvals

Field Service approved by:

Date:

Engineering approved by:

Date:

EHSS approved by:

Date: