IW901231 SA51 Igniter Manual

Hamworthy Combustion Engineering Limited

Fleets Corner, Poole, Dorset BH17 0LA England. Tel: +44 (0)1202 662573 Fax: +44 (0)1202 662722 E-mail: [email protected]

INSTALLATION, OPERATING & MAINTENANCE

INSTRUCTIONS

HAMWORTHY COMBUSTION S.A.51 GAS IGNITER

CUSTOMER : ELECTRO-TOTAL S.R.L

PURCHASE No : HAM01112011/07.11.2011

HAMWORTHY COMBUSTION CONTRACT NUMBER : IW901231

Hamworthy Combustion Engineering Ltd

Fleets Corner, Poole, Dorset, BH17 0LA

Telephone: 01202 663913 Faxsimile: 01202 662722 E-mail: [email protected]

Hamworthy Combustion Contents

Hamworthy Combustion Contract Number IW901038 of 13 Pages

Section Title Number

CONTENTS ...................................................................................................................................... 2

1. INTRODUCTION ....................................................................................................................... 4

1.1 Equipment Supply Overview .................................................................................................. 4

2. DESCRIPTION OF SA51 GAS / ELECTRIC IGNITER .............................................................. 5

2.1 Description and Operation ..................................................................................................... 5

3. COMMISSIONING ..................................................................................................................... 7

4. SPECIFICATION ....................................................................................................................... 8

5. CALIBRATION CURVES ........................................................................................................... 9

5.1 Natural Gas ........................................................................................................................... 9

5.2 Propane ............................................................................................................................... 10

6. Stability and Performance Curves............................................................................................ 11

6.1 Natural Gas ......................................................................................................................... 11

6.2 Propane ............................................................................................................................... 11

7. Reccomended Spares List ....................................................................................................... 12

APPENDIX A :DRAWING LIST ....................................................................................................... 13

Hamworthy Combustion Copyright


Published by

Hamworthy Combustion Engineering Limited (“Hamworth y”)

of Fleets Corner, Poole, Dorset, BH17 0LA.

First published:...............2006

Copyright and Design Right © Hamworthy Combustion Engineering Limited [2005]

All rights reserved

The manual may only be re-produced for the purposes of this project.

This manual may not be lent, sold, hired out or otherwise disposed of by way of trade in any form whatsoever.

PRINTED IN THE UK

NOTES:

1. The information contained in this manual is intended as a guide only for use by suitably trained and qualified personnel. Hamworthy can provide training. If in doubt about the interpretation of this guide, the user should contact Hamworthy.

2. Hamworthy has made every effort to ensure that the information contained in this guide is accurate at the time of publication. Its contents should be used however as guidance material only and not as a replacement of current regulations or existing standards or any contractual specification.

3. As the application of the subject matter of this manual will differ dependent upon the particular circumstances Hamworthy accept no liability for any loss of any kind (including consequential or indirect loss) occasioned by any person relying upon this manual.

Hamworthy Combustion Introduction


1. INTRODUCTION

These installation and operating instructions have been compiled to provide the installer and user of HCEL S.A.51 Igniter with all the information necessary for the correct installation, operation and maintenance. For safe and efficient operation it is essential that all the personnel involved with the installation, operation and maintenance of these Igniters are familiar with these instructions. HCEL instructions should of course be read in conjunction with those provided by the main plant supplier etc.

It must be emphasised that to obtain satisfactory performance throughout the Igniters operating life the burner must be maintained in first class condition. Inefficient combustion caused by deterioration costs much more than any saving in maintenance costs. Similarly only genuine HCEL spares should be used since inferior spares will result in poor combustion and increased fuel costs by many more times than the cost of the genuine spares.

For spares and other assistance please contact [email protected] .

1.1 Equipment Supply Overview

This contract comprises the supply of two off S.A.51 Gas Igniters complete with ignition control boxes.

Hamworthy Combustion Description


2. DESCRIPTION OF SA51 GAS / ELECTRIC IGNITER

The Igniter is of rugged construction specially designed to give long and reliable continuous operation under arduous conditions.

2.1 DESCRIPTION AND OPERATION

The Hamworthy Combustion S.A.51 Gas Igniter has the form of a gas supply tube, an insulated high tension electrode, a primary self aerating chamber and a flame stabilising chamber. The design of the igniter is such that it can operate over a wide range of windbox air conditions without requiring any external source of air supply.

The gas supply to the igniter is introduced through female socket and is piped to the controlled exit orifices via the gas tube. The nominal gas supply pressure should be 5 psig (N.Gas) or 3 psi (propane).

Hamworthy Combustion Description


The initial ignition is derived usually from a high tension (8 ½ - 10 k.v.) electrical supply conducted to a pre-set spark gap in the flame stabilising chamber by means of a mineral insulated copper covered electrode. The electrode is a unit assembly and may be removed by unscrewing at the igniter head and withdrawing the entire length. The ignition transformer is remote from the igniter assembly and is supplied with 110V.ac. input (see Appendix A drg DE-056-022 for the outline drawing and for the wiring schematic).

The ionisation probe, manufactured in type 316 stainless steel and surrounded by ceramic type insulators enclosed and supported in a 316 stainless steel carrier tube. The entire assembly runs adjacent and parallel to the H.T. electrode and terminates inside the igniter nozzle casing, from where the probe itself continues unsupported into the flame zone.

The principle operation is such that all gas enters the primary aeration chamber at high velocity, this entrains the air from the register by a well known principle. The degree of aeration is such that it is virtually unaffected by windbox air conditions. The electrical spark ignites the gas mix in the flame stabilising chamber where additional air is entrained from the register to complete the mix.

The igniter is held in position by a flange mounted to the register front plate and may be removed by disconnection of the gas pipe, the high tension lead and the flange bolts.

Attached to the igniter nozzle casing is a grounding rod assembly. The probe and kanthal grounding rod are fully immersed in the flame envelope during operation. When a voltage is applied between the two electrodes an ionisation current flows, the D.C. component of which is used via a suitable amplifier to give a positive indication of flame presence.

The correct operation of the ionisation probe depends on:

1. The presence of a good stable flame which has well defined boundaries.

2. An adequate grounding area which will effectively ground the ignition flame.

3. The location of the flame rod within the flame envelope.

The S.A.51 igniter meets all these requirements and provides a positive indication of the presence of an ignition flame with total discrimination from the main flame.

Hamworthy Combustion Commissioning


3.0 COMMISSIONING

The igniter has been designed with a wide range of stability to permit operation at any register air pressure within the normal burner turndown range. It should be noted that on propane and other similar LPG gases which have a fairly narrow limit of flammability, the gas/air mixture ratio is relatively critical and the specified gas flow rates and pressures should be adhered to.

These conditions have been determined from the standard data sheets illustrating the stability characteristics and calibration for the igniter.

Having set the igniter conditions, this should then be tested over the operation range of the windbox pressures and temperatures. If there is any doubt about the igniter performance, it can be bench tested out of the burner where gas flows can be optimised.

Hamworthy Combustion Specification


4.0 SPECIFICATION Propane Capacity - 50 k W Propane qty - 2 m3 /hr Natural Gas Capacity - 50 k W Natural Gas qty - 5 m3/hr Propane Gas supply pressure - 3 psig Natural Gas Supply pressure - 5 psig

Hamworthy Combustion Calibration Curves


5.0 Calibration Curves

5.1 Natural Gas

0

2

4

6

8

10

12

14

0 50 100 150 200 250 300

Nat

ural

Gas

Pre

ssur

e LB

F/IN

^2

Natural Gas Flow (SCFH)

Natural Gas Calibration For the S.A.51 Gas Electric Igniter

Air Temp 300 DegC

Air Temp 20 DegC

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0 1 2 3 4 5 6 7

Gas

Pre

ssur

e (b

arg

)

Gas Flow Rate (Nm^3/h)

S.A.51 Ionization Proving Igniter Calibration on Nat ural Gas

Natural Gas



5.2 Propane Gas

0

1

2

3

4

5

6

7

8

9

10

0 20 40 60 80 100 120 140 160

Gas

Pre

ssur

e (P

SIG

)

Gas Flow Rate (ft^3/h)

S.A.51 Ionization Proving Igniter Calibration on Pr opane

Propane

0

2

4

6

8

10

12

0 20 40 60 80 100 120 140 160

Pro

pane

Gas

Pre

ssur

e (L

BF

/IN^2

)

Propane Gas Flow (S.C.F.H)

Propane Gas Calibration for the S.A.51 Gas / Electr ic Igniter

Gas Pressure at 20 DegC

Gas Pressure at 300 DegC


Hamworthy Combustion Contract Number IW901038 Page 13 of 13 Pages

6.0 Stabiity and Performance Curves

6.1 Natural Gas

6.2 Propane Gas

0

2

4

6

8

10

12

0 2 4 6 8 10 12

Nat

Gas

Pre

ssur

e (

LB/IN

^2)

Register Draught Loss (IN wg)

Stability and Performance Operating Band for the S. A.51 Gas / Electric Igniter

Air Temp 300 DegC

Air Temp 20 DegC

Maximum Tested Pressure


Stability and Perfor mance Operating Band for the S.A51 Gas / Electric Igniter

0

2

4

6

8

10

12

0 2 4 6 8 10 12

Register Daught Loss (IN wg)

Air Temp 20 DegC

Maximum Tested Pressure Air Temp 270 DegC




Appendix A

Drawing List:

SA51 Igniter with boost and ionisation probe (Hazar dous area area) CS00198 Issue C Ignition junction box with ionisation detector DE-056-022

IW901231 SA51 Igniter Manual

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