G9B fixed position rotating sootblower

The G9B sootblower is designed toremove ash deposits from tube sur-faces in stationary, marine boilers,waste heat boilers, and direct-firedoil-heaters, where gas temperaturezones inside the boiler permit afixed cleaning element.

The G9B may also be used forcleaning low-temperature gaszones in large boilers, includingreheaters, economizers, and gasrecirculation and precipitator ducts.A multi-nozzled element is used in alane blowing or mass blowing con-figuration for complete cleaning ofthe boiler tube surface area (seeadjacent figure). Four elementmaterials are available for differenttemperature requirements.

The G9B blower requires onlyone operation to rotate the blowingelement and simultaneously openand close the supply valve.

The G9B can be configured tooperate with an electric motor, airmotor, chain (manual), or crank.

Where differential expansionbetween the tube bank and boilerwall exceeds 5/8", a self-adjustingflexible element connection pre-vents the element from beingstressed, thus decreasing elementbreakage and warpage. The headis rigidly bolted to the wallbox, withthe element moving freely.

A floater mounted head is usedwhen less than 5/8" differentialexpansion takes place between theboiler wall and boiler. The floaterprovides for piping expansion andeliminates element binding frompiping strain. Either arrangementprovides for longitudinal adjustmentof the blowing element.

When manually operated headsare located within reach of the flooror gallery, the sheave wheel andoperating chain can be replaced bya forged steel crank.

G9B fixed position rotating sootblower

The elevation at left shows a typi-cal Diamond Power® G9B soot-blower system. The arrangementshows (A) three convection-sec-tion G9B blowers and (B) two ofthe four G9B blowers installed inthe economizer at the rear of theboiler.

Lane blowing: Nozzles are reg-istered with tube lanes so the ele-ment can be located immediatelynext to the tube bank. Thisarrangement is generally used inboiler convection-sections orwhere there is not enough cavityspace for mass blowing.Elements for lane blowing willhave proportionately more noz-zles of smaller diameter than ele-ments used for mass blowing.

Mass blowing: For larger cavityareas and staggered tubearrangements, the element hasfewer nozzles of larger diameterto create a "mass" blowing effectacross the entire tube surface—a "shotgun" instead of "rifle"effect.A. Direct mechanical valveaction without

Effective cleaning using a typical G9B sootblower system.

pilot actuation.

B. Micrometer-like adjustment for very close regulation at low flow rates.

C. Quick and simple adjustment of pressure control.

D. Flexible seat and disc to prevent leakage.

E. Rugged stem, proper guiding, and generous packing surface result in minimum maintenance.

F. Valve seat is welded in head.

G. Stellite valve seat.

H. Poppet construction assures tight seating.

A

B

D

E

C

FGH

Cut-away view showing G9B Poppet Valve Adjustable Pressure Control

A

B

Element Supports G9B Element

Positive gear drive directfrom motor, chain wheel, orhand crank.

Element material and nozzles are customized to meet boiler design spec-ifications for gas stream temperature andash deposition characteristics.

Positive action poppetvalve, with direct mechanicalactuation, provides reliable, fullstroke opening and closing.

Cam-and-trigger operationprovides flexibility of blowingcontrol, allowing the blowing arcto be changed at any time byaltering the cam length.

Built-in adjustable pressure control permits indi-vidual blowing pressure settingsthat meet optimum installationrequirements.

Pressure regulation is achievedby simple adjustment of a vari-able orifice downstream of thevalve seat. This eliminates sur-face cutting and unstable pres-sure which occur when throttlingis attempted by varying thestroke of the valve. The flexibleseat and self-aligning disc mini-mize leakage from thermal distor-tion. A self-centering disc extendssealing life.

Cleaning coverage(element length)

Element rotation speed

Element materials

Blowing revolutions

Blowing medium valve

Motor data

Hazardous locations

Limit switches

Motor starter

Blower mountingarrangements

Miscellaneous Information

Motor

Drive Type

Pressure Control

Blowing Arc

Normally to 15 feet for field erected boilers and to 20 feet for package boilers

Approximately 3 rpm

Steel for 0-900ºF gas temperature; calorized steel for 900-1600ºF; Dialoy (ferritic stainless steel)1600-1900ºF; and RA330 1900-2100°F

A choice of one or two per blowing cycle (with minor adjustment)

Diamond poppet valve

1/6 hp, TENV, frame 56, 1750 rpm, Class B insulation, 230/460 volts, 3-phase, 60 Hertz.Single-phase motor and other voltages and frequencies available.

Electric motor and control available for NEC Class I, Groups B, C, or D, Division 2 areas

Enclosed in control box suitable for outdoor service

May be blower-mounted or located remotely in a separate or common cabinet

With blowing medium inlet horizontal to right or left, vertically down or 45 degrees either side of vertical

Blower can be operated from local push button in addition to automatic operation from a control panel.Blower suitable for horizontal or vertical installation.

Electric or Air

Electric, Air or Manual (chain)

Internal

Field cut and set cam. Shop cut and set cam. 105° thru 335° (increments of 10°)

Dimension (inches) A B C D E F G H I J K L M N O P Q

Crank 75/8 911/16 71/4 1615/16 53/8 2113/16 71/2 103/16 131/2 — — — 611/16 63/4 101/16 2 295/16

Chain 75/8 911/16 71/4 1615/16 53/4 — — 103/16 131/2 91/2 253/8 71/2 — — — — —

Dimension (inches) A B C D E F G H I J K L M N O P Q R S

Air 75/8 71/4 913/16 171/16 911/16 83/8 183/16 — 111/2 131/2 107/16 — 2515/16 — — 71/4 53/4 — 53/4

Electric 75/8 71/4 — 183/8 911/16 83/8 191/2 111/8 111/2 131/2 — 115/16 — 271/4 73/8 — 53/4 131/8 53/4

Manual operation—crank and sheave wheel

Notes: This head normally is mounted verti-cally as shown; however, when necessary itcan be mounted horizontally at 90 degrees—right or left hand. Blower is furnished withcast steel or chrome moly goosenecks forservice up to 1100 psig @ 835°F.

Motor operation—air and electric

Notes: Motors shown for right hand arrangement are not reversible for left handarrangement. “Floater” element constructionis by solid line; “flexible” by dotted.

The following is a suggested state-ment for specifying this sootblow-er: “The fixed position rotatingsootblower(s) shall be DiamondModel G9B (or approved equal)complete with totally enclosedelectric-motor drive (or completewith air-motor drive and control,etc.—or complete with manually-operated gear drive) providingclockwise element rotation,mechanical poppet valve-in-headwith integral and internallyadjustable pressure control inde-

pendent of valve opening. Valveoperation shall be by cam and trig-ger providing mechanical valveaction. The blowing arc shall bedetermined by the length of thecam. Longitudinal element adjust-ment shall be available. The soot-blower head and piping shall besecured in such a way as to beindependent of the boiler tubemovement. The elements shall beconnected to the G9B by means ofcouplings that assure freedom ofelement rotation. The element shall

How to write specifications for the G9B sootblower

Dimensions of the G9B sootblower

be designed to meet the temper-ature requirements of the boilerlocation. Nozzles shall be suit-ably arranged to direct blowingmedium for adequate cleaning.The elements shall be supportedby bearings which are capable ofwithstanding surrounding temper-atures, welded or clamped to theboiler tubes and shall be of suffi-cient number to insure properelement support.”

For nearly a century, Diamond Powerhas been involved in cleaning boilersof all types and sizes burning virtuallyevery type of fuel. Our sootblowershave logged more hours of operationworldwide than any of our competi-tors. The reason for Diamond’s suc-cess is simple—we maintain veryhigh standards of quality in our prod-ucts, our products are backed by aliberal warranty, we provide the tech-nical expertise and professional fieldsales and service staff to keep yourboiler operating at peak efficiency.Diamond also maintains a nationwidenetwork of service centers positionedto serve regional requirements forreplacement parts and services.

Rugged sootblowers to keepyour boilers cleanThe first Diamond Power® sootblowerwent into operation in 1903. Sincethen, we have provided technicalinnovations in combustion, mechani-cal, and electrical engineering tobecome the world leader in boilercleaning technology. And today, weoffer a variety of custom-designedboiler cleaning equipment to keepyour boiler tube surfaces clean, evenunder the most demanding condi-tions.

It makes no difference what type orquality of fuel you're firing. Whetherit's oil or coal, our experienced engi-neers can design a complete soot-blower system that meets your specif-ic boiler cleaning needs.

Fuel flexibility with DiamondcontrolsAs part of our design package, ourengineers can tailor a control systemto your cleaning requirements.Accurate and reliable, our control sys-tems let you quickly change cleaningprograms to keep pace with changesin your fuel supply.

Diamond Power® control systemsare built for easy use, and compo-nents are readily accessible for quick,low-cost maintenance.

Diamond Power's total system approachhelps keep your boilers on-line

Diamond parts and serviceback your cleaning operationAt Diamond service centers in theAtlanta, GA; Chicago, IL; and Seattle,WA areas, our factory-trained techni-cians are ready to provide on-sitesootblower maintenance. What'smore, they're backed by a completerebuilding capability and an extensiveinventory of high-usage replacementparts.

For maximum maintenance protec-tion, we offer partnership stocking andmaintenance agreements. At regularlyscheduled intervals, we'll provideservice and maintenance for allDiamond Power® boiler cleaningequipment.

At Diamond Power, we know yourgoal is to keep your boiler operatingefficiently. And we can meet yourrequirements with our total cleaningsystem of sootblowers, controls, andservice.