CONTROL NARRATIVE

SIHI PUMPS, INC. 225 Speedvale Ave. West, Guelph, ON, N1H 1C5 Tel: 519-824-4600 Fax: 519-824-7250 E-mail: mail@sihi.com www.sihi-pumps.com ISO 9001 Registered Customer : SIHI Peru PO# : 10-1283LVC SIHI Sales Order # : 4000023150 SIHI System drawing : SC2001108 Date : 27 November, 2012 WARNING : The current system set points for alarms and shut down conditions are based on our general testing process. Process set points must be adjusted according with specific customer process environment and required system performance. (0) P&ID

(1)SYSTEM DESCRIPTION

The compressor system will include the following main components :

• Compressor • Compressor Motor • Separator • Heat Exchanger • Seal Pots.

The intent is to obtain an operating discharge pressure of 10 psig. (2) INITIAL COMPRESSOR START

The liquid-ring compressor requires a prime of water such that the liquid level in the casing is at shaft center-line. This prime of liquid sets up the liquid-ring seal through centrifugal action in the machine, so that compression can occur. Upon start-up of a dry system, the compressor casing must first be filled with water to the shaft centerline.

(3) SUCTION LINE

The suction line consists of a check valve, low pressure switch, and a pressure gauge with isolation valve. The check valve prevents water from back filling the upstream components if an upset condition exists. A low pressure switch is used to monitor the pressure level of the inlet. If vacuum is accidentally drawn by the compressor, the switch will trip and the by-pass modulated valve is opening . This will protect the equipment upstream of the compressor from seeing large vacuum pressure levels. A pressure gauge is used to monitor the inlet pressure level during operation. A manual isolation valve is used to allow maintenance of the pressure gauge during operation.

(4) DISCHARGE SEPARATOR TANK

(a) General:

The separator tank is of the 2-phase design. The two phases consist of: 1.) Process Gas, 2.) Liquid Water. Separation is achieved through baffling, and centrifugal action.

(b) Water Level:

The reservoir of the tank is equipped with a liquid level sight glass . There is a level transmitter on the tank that will protect the system from any clogging/plugging of the drain. Once one of the liquid level set points is reached, the PLC will cause a shutdown of the compressor motor or will open the make-up valve.

(c) Pressure:

The tank is designed to operate at 75 psig. For safety precaution, a pressure relief valve is mounted on the separator tank. This pressure relief valve is used to protect the separator tank from high operating pressures. The valve will trip at 90 psig (on the rise) .

(5) SERVICE LIQUID LINE The service liquid line is equipped with the following components:

(a) Basket Strainer:

A basket strainer is used to filter out any foreign objects that might enter the compressor service liquid port. It is very important to limit the amount of large debris from entering the compressor. A large object has the potential of reducing the life of the compressor or prevent the compressor from operating properly. In order to prevent the strainer clogging a differential pressure transmitter is installed in parallel with the Y strainer line.

(b) Solenoid Valve:

A solenoid valve is used to automatically start or stop the flow of service liquid to the separator tank. The solenoid valve will communicate with the PLC and will operate according with level transmitter .

(c) Pressure Gauge:

A compound pressure gauge is used to measure the amount of service liquid pressure in the line. A manual isolation valve is used to block the line off when maintenance is required.

(d) Temperature Gauge: A temperature gauge is used to measure the amount of service liquid temperature in the line. If the temperature is reaching 180 F then the process need to be stopped for the heat exchanger inspection.

(6) START-UP

To start the system up, the inlet and vent pipe must be opened to atmosphere to allow the process gas to enter the compressor. Make sure the manual valve on the service liquid line is open. The manual valve must be adjusted to allow the appropriate amount of service liquid flow to the compressor(keep the pressure on the compound pressure gauge at max. 7 psig) . Service liquid and process gas is discharged into the separator tank.

(7) SHUTDOWN To shutdown the compressor system during operation, the compressor motor must be powered down. Open the manual ball valve in the drain line to dispose of any liquid in the tank and drain lines.

PERFORMANCE DATA:

Requirements:

Application: Reactors

Dry Gas Composition:

Water Vapor: 3.66

Carbon Dioxide: 61.97 wt%

Hydrogen Sulfide: 34.37 wt%

Dry Gas Mass Flow: 18.37 Metric Tons Per Day

Barometric Pressure: 14.1 PSIA

Site Elevation: 350 M.A.S.L.

Suction Pressure: 20 mm H20

Suction Temperature: 45.94 °C

Calculated Capacity: 320 ACFM

Discharge Pressure: 6 PSIG

Service Liquid: Water @ 8°C

Cooling Liquid: Water @ 4°C

Compressor Performance:

Model: 60520

Capacity: 320 ACFM

Suction Pressure: 20 mm H20

Suction Temperature: 45.9 °C

Offered Discharge Pressure: 10 PSIG

Installed Motor Power: 40 HP

Pump Speed: 1750 RPM

BHP: 28

Cooling Liquid Rate: 30 USGPM

Required Water Purge: 0.5 USGPM

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