emissions phenomenon in the compressor station’s

Minimization of the unjustified gas

emissions phenomenon in the

compressor station’s technological

instalations

EuRoPol GAZ s.a.Emiliya Yakubovich

[email protected]

1. General introduction2. Transmission system located on the map 3. Technical data regarding the transmission

system4. Explosive gas and fire detection system5. Adding a signal "TUCO emergency

shutdown without blow out„6. Exhaust emission monitoring7. Exhaust emission monitoring - Conclusions

Content

1. General Introduction

EuRoPol GAZ is the owner of Polish section of the transit pipeline Yamal- Europe.The route of the pipeline runs from the Yamal Peninsula, then it runs through the territory of Belarus, Poland to Western Europe.EuRoPol GAZ was established in 1993 and the transit of natural gas to Germany started in 1999. The Polish section of the pipeline with a length of approx. 684 km transports thenatural gas for the needs of customers in Poland and Europe.The company GAZ-SYSTEM s.a. is a transmission system operator of the Polish section of thetransit pipeline Yamal- Europe.

STRATEGIC OBJECTIVES The strategic objectives of the EuRoPol GAZ operation are safe,reliable and environmentally friendly supply of transport services of natural gas. EuRoPol GAZ as the owner of the Polish section of the Yamal-Europe pipeline is responsible for this in the range resulting from the agreements and contracts.

2. Transmission system located on the map

Source: www.gazprom.ru

2. Transmission system located on the map

Kondratki

TG ZambrówTG Ciechanów

TG WłocławekTG Szamotuły

LwówekWłocławek

Mallnow Entry point

Exit pointExit point

Exit point

TG Kondratki

RU

DEBY

SK

СZ UA

LT

Basic technical specifications of the Polish section of the transit pipeline:

Operating pressure - 8,4 MPa,Length– 684 km,Pipeline diameter - DN1400,Technical capacity ≈ 33 bcm/year (99,23 mln cubic meters/ day at T= 20C)Physical entry point Kondratki (EuRoPol GAZ is the owner),Physical exit points: Wloclawek (EuRoPol GAZ is the owner)

Lwowek (Gaz-System is the owner)Mallnow (GASCADE is the owner)

5 compressor stations representing a total installed capacity of 400 MW34 valve stations equipped with the shut-off system valves

3. Technical data of gas transmissionsystem

To avoid gas emission situations and to maintainfire safety in gas compressor stations there was installed a system to protect and secure the gas compressor instalations. This system provides:

• achieving a high level of industrial facility security in accordance with SIL2 levels,

• fire detection in technological and office facilities in the initial phase of danger,

• protection of technical infrastructure by automatic prevention of gas explosions,

• the implementation of an early warning function for gas leaks,

• reducing the false alarms and, as a result, simplifying the maintenance of the system

• reduction of methane emissions to the atmosphere as a result of unjustified operation of the system

4. Explosive gas and fire detection system

Gas compressor station’s buildings under fire protection system:

• Fire water pumping station• Concierge building• Administrative building - floor with dispatching room• Administrative building - ground floor• Oil and lubricant storage• Workshop building with boiler room• Reduction and gas measurement station for own needs building• Energy station with aggregates room• Turbocompressor buildings• Containers for turbocompressor measuring ang control equipment• Containers for gas filter’s measuring ang control equipment



Architecture of the explosive gas and fire detection system

Central firepanel

Operator panel

CommunicationmoduleFlame and gas

detectors


Point gas detector• Detects the presence of gas at the instalation site• It is insensitive to lack of oxygen in the supervised space

Linear gas detector Detects the presense of gas on the way

between transmitter and receiver

It is insensitive to lack of oxygen in the supervised space

• Detectors arrangement was designed on the basis of gas flow testing.

• It is not allowed to change the place of installed detectors.

• Every re-arrangement of space, equipmentinstallation or dismantling and otheractivities which may affect the change of airstream path means that there is a need to re-design the position of gas detectors



In cases when on site it comes to hazardous situation such as gas leakage, fire, smokiness occuring

within the plant, the system activates optical and acoustic devices, transmits information about

the location and type of alarm to synoptic screens. If necessary, automatic procedures are

launched to put devices in a safe state. Various emergency algorithms are implemented to ensure

maximum safety for staff and devices.The system protects:• Security at SIL2 level,• Eliminates gas leakeges within the compressor station• Reduces the risk of human and material losses resulting from breakdowns, production

stoppages and forced maintenance, • Increases the safety level of technological installations and protection of people.

5. Adding a signal "TUCO emergency shutdown without blow out„

The originally designed emergency shutdown of turbocompressors (TUCO) installed in gas

compressor stations was carried out with gas blow out from the installations. Taking into

advantage the experience in operation and ecological care additional mode for TUCO emergency

shutdown without gas blow out was introduced. To achieve that goal we had the CHAZOP

analysis (threat analysis and operational capabilities of automation systems) and it was decided to

upgrade the system to eliminate „TUCO emergency shutdown with blow out” where it is not

necessary.


The scope of changes (modifications) in ESD system included the extensions in cablecommunication between ESD and UCS controllers consisting in adding signals "TUCO emergency shutdown mode from ESD without blow out".Operation limits of USC (unified computing system) and ESD (emergency shutdown system) systems had been set to the following modes:• Emergency shutdown without blow out• Emergency shutdown with blow out

In case of pumping, TUCO should be shutdowned without blowing out of process gas.


• An extension has been introduced in cable communication between ESD and UCS controllers consisting in adding signals " TUCO emergency shutdownmode from ESD without blow out ".

• The changes covered the adopting of additional cable signals to the sparechannels of USC system modules, and modifications of cable sheating and TUCO control algorithms so that it would be possible to shut down the TUCO reliably and safely without blowing gas out of the installations.

• These modifications were analyzed with the TUCO producer.

This modernisationensured

- Equipment security

- Staff safety- Shortening the timeto restore machinesto normal operationafter emergencyshutdown

- Reduction of fugitive emissions, i.e. environmental protection -reduction of methane emissions

6. Exhaust emission monitoring

Requirements (BAT conclusions, IED Directive, Regulation of emission standards) regarding gasemissions come into force, which forces enterprises with exhaust emission to adapt theirinstalations to the continious measurement of emissions, including the use of low-emissioninstalaltions to meet requirements of the standards. • compressor stations which were built and commissioned before 2003 are excluded from

requirements of continious monitoring of emissions. Emissions monitoring is currentlyinstalled on these compressor stations but it is only used for technological purposes.

• The new regulation will apply to new compressor stations from August 2021. An investment process is currently underway to install equipment for continuous monitoring of exhaust emissions.

View of the turbine hall, emitter


Currently, in accordance with the requirements, periodic measurements of exhaust emissions arecarried out for all compressor stations. These tests are carried out by an external laboratory twicea year. The devices used for measurements must have current metrological properties.

Requirements for continuous emission monitoring system:• Gas compressor stations commissioned before 2003 there are no requirements for the

installation of exhaust gas monitoring.• Gas compressor stations commissioned after 2003, emission monitoring installations will have

to meet metrological requirements (based on periodic checks).

A comprehensive analysis of sources subject to BAT LCP (Best avaliable technicsfor large combustion plants) has been done in our company. In all compressorstations LCP sources covered by BAT conclusions are:• All gas turbines

Installation type and parameters• Fueled with natural gas• Used > 1 500 hours/year• Used without use of nitric oxide reduction techniques• Equiped with continious measurements systems used for

technological purposes• In usage

• Before 2003 (indicative NOX emissions)• After 2003 (higher BAT-AELs for NOX emissions)


Exhaust emission monitoring installed in CS commissioned before 2003

The sollution installed in compressorstations assumes the adoption of the „colder gas path” principle, so resignationof the heated filter in close proximity to the sampling site. This solution eliminatesthe need to add additional heating elements to the EX zone and has beentested earlier on gas turbines up to 50MW.

NOx analyzer container

heated hose

NOx analyzer probe


Exhaust emission monitoring installed in CS commissioned before 2003Oxygen measurement in exhaust fumesis done using a modern paramagnetic

sensor, and the hose supplying the sampleto the analyzer is in the EX version. Thesesollutions are more favorable in terms of greater reliability and system security.

Technical data of the analyzer:

Range/measurement technique range min range max

NO (infrared) 0-200 ppm 0-2000 ppm

O2 (paramagnetical sensor) 0-25% vol.;

Measuringcabinet

Container



Exhaust emission monitoring installed in CS commissioned before 2003

The measuring system is equiped with NO2/NO converter. The gas sample after passing throughthe converter is directed to the gas analyzer. The converter converts nitrogen dioxide NO2contained in the gas sample into nitric oxide using a special high-efficiency catalyst.


Conformity assessment - BAT 44 NOX emission levels - requirementsBAT-AELsFor compressor stations commissioned after 2003

60 mg/Nm3 – annual average value65 mg/Nm3 – daily average value or average over the sampling period

For compressor stations commissioned before 2003 – Indicative rating:140 mg/Nm3 – daily average value or average over the sampling period

Applicable standard is 75 mg/Nm3

8. Exhaust emission monitoring - conclusions

• Systems for measuring continuous emissions to air from gas turbines must meet the requirements of the general standards EN 15267-1, EN 15267-2, EN 15267-3 indicated in the BAT conclusions

• There is necessity to comply with NOx emission limit values resulting from BAT AEL levels in compressor stations commissioned after 2003

• There is necessity to implement additional techniques to adapt NOx emission to BAT-AEL levels for these compressor stations

• For all compressor stations it is neccesary to conduct a performance test of individual turbinesto confirm their mechanical efficiency.

• Obtaining the decision of state authorities regarding the need to carry out measurements of continuous emissions from the combustion of natural gas in gas turbines installed before 2003

8. Exhaust emission monitoring - conclusions

• Development of the emission managment plan under conditions differentthan normal conditions of use under the enviromental managementsystem.

• Emission monitoring system allows for a detailed assesment of the impactof turbine settings on the quantity and quality of generated exhaust gasses, so it is possible to analyze which modes of operation are the most favorable in terms of ecology, which allows to control the flow taking thisaspect into account and select such working conditions of the gascompressor station to meet the required standards and reduce an exhaustemissions.

Thank you for your attention

EuRoPol GAZ s.a.Emiliya [email protected]

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emissions phenomenon in the compressor station’s