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Eclipse ImmersoJet v2.20 Design Guide 330, 10/02

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1

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Control methodology

ImmersoJet burners use a modulating on-ratio control system
as shown in Figure 3.3. To control the heat delivered by the
burner, adjust the air flow to the burner. The gas flow will
change in proportion to the air flow.

The burner will operate reliably at any input between the low
fire and high fire limits stated on the burner‘s Data Sheet.

S

S

S

S

S

TEP

TEP

TEP

TEP

TEP

3:

3:

3:

3:

3:

C

ONTROL

S

YSTEM

Components

Automatic butterfly valve

Ratio regulator: varies gas flow to
burner in proportion to air flow.

Automatic shut-off valve (optional).

Manual butterfly valve

Safety

valve

train

Figure 3.3 System Schematics

Loading line

Packaged blower

Remote blower with
External air butterfly valve–
Multiple burner zones

Safety

valve

train

Loading

line

Remote blower with
External air butterfly valve

Safety

valve

train

Loading

line

1

2

3

4

to other burners

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Содержание ImmersoJet Series

Страница 1: ...Immersion Burners version 2 20 ImmersoJet Series No 330 10 02 Design Guide ...

Страница 2: ... No further warranty is expressed or implied We have made every effort to make this manual as accurate and complete as possible Should you find errors or omissions please bring them to our attention so that we may correct them In this way we hope to improve our product documentation for the benefit of our customers Please send your corrections and comments to our Documentation Manager It must be u...

Страница 3: ... kind of equipment Design Guide No 330 This document Data Sheet No 330 2 330 3 330 4 330 6 330 7 330 8 Available for individual IJ models Required to complete design calculations in this guide Installation Guide No 330 Used with Data Sheet to complete installation Price List No 330 Used to order burners EFE 825 Combustion Engineering Guide Eclipse bulletins and Info Guides 610 710 720 730 742 744 ...

Страница 4: ...dures Act with great care and follow the instructions w Warning Indicates hazards or unsafe practices which could result in severe personal injury or damage Act with great care and follow the instructions c Caution Indicates hazards or unsafe practices which could result in damage to the machine or minor personal injury Act carefully n Note Indicates an important part of the text Read thoroughly I...

Страница 5: ...ilities 10 OperatorTraining 10 Replacement Parts 10 System Design 11 Step 1 Burner model selection 11 Step 2 Tube design 13 Step 3 Control methodology 15 Step 4 Ignition system 16 Step 5 Flame monitoring system 16 Step 6 Combustion air system 17 Step 7 Main gas shut off valve train 20 Step 8 Process temperature control system 20 Appendix 21 Key to the system schematics 22 1 2 3 5 ...

Страница 6: ...Eclipse ImmersoJet v2 20 Design Guide 330 10 02 This page left blank intentionally 6 ...

Страница 7: ...s which means less tank space is occupied by the tubes With a combustion chamber that is integral to the burner body the new version of the ImmersoJet can sit lower on the tank than previous ImmersoJet models FEATURES 7 The ImmersoJet IJ is a nozzle mix tube firing burner that is designed to fire at high velocities through small diameter immersion tubes The standard burner includes a packaged blow...

Страница 8: ...Eclipse ImmersoJet v2 20 Design Guide 330 10 02 This page left blank intentionally 8 ...

Страница 9: ...s Never try to light the burner if the burner shows signs of damage or malfunctioning w Warning The burner is likely to have HOT surfaces Always wear protective clothing when approaching the burner n Note This manual gives information for the use of these burners for their specific design purpose Do not deviate from any instructions or application limits in this manual without written advice from ...

Страница 10: ...equipment The best safety precaution is an alert and competent operator Thoroughly instruct operators so they demonstrate an understanding of the equipment and its operation Regular retraining must be scheduled to maintain a high degree of proficiency Order replacement parts from Eclipse only Any customer supplied valves or switches should carry UL FM CSA CGA and or CE approval where applicable CA...

Страница 11: ...t storage Detailed guidelines for heat balance calculations are in the Eclipse Combustion Engineering Guide EFE 825 Select tube efficiency The efficiency of the tube is the net heat input to the tank divided by the heat input to the tube Efficiency is determined by the effective tube length The diameter of the tube has little influence on the efficiency At a given burner input the net input to the...

Страница 12: ...it the burner to capacity shown in the limited capacity portion of Figure 3 1 based on tube size Cooking oils To avoid burning the oil limit heat flux to 50 Btu hr per square inch of tube area Highly viscous liquids All immersion systems depend on natural convection currents to carry heat away from the tube and throughout the tank Convection is minimal in high viscosity solutions such as asphalt r...

Страница 13: ...red effective tube length using the previously selected tube efficiency net heat input values and the following figures 3 2 or 3 3 The effective length of a tube is the total centerline length of tube covered by liquid S S S S STEP TEP TEP TEP TEP 2 2 2 2 2 TUBE DESIGN Figure 3 2 Effective Tube Length to 200 ft Figure 3 3 Effective Tube Length to 50 ft 13 See area enlarged below 35 40 45 50 Effect...

Страница 14: ... gases is lower when they pass through the roof n Note Leave access between the draft hood and the tube exhaust Install a damper plate if acoustic feedback occurs in the tube Condensate provisions If the immersion tube will operate at efficiencies less than 80 the exhaust leg can be raised through the liquid surface For efficiencies of 80 or higher locate the exhaust stack outside of the tank and ...

Страница 15: ...ire and high fire limits stated on the burner s Data Sheet S S S S STEP TEP TEP TEP TEP 3 3 3 3 3 CONTROL SYSTEM Components Automatic butterfly valve Ratio regulator varies gas flow to burner in proportion to air flow Automatic shut off valve optional Manual butterfly valve Safety valve train Figure 3 3 System Schematics Loading line Packaged blower Remote blower with External air butterfly valve ...

Страница 16: ...o the gas flow at start conditions In the USA with a time of 15 seconds to ignition there should be sufficient time to ignite the burners It is possible however to have the low fire too low to ignite within the time limit Under these circumstances you must consider the following options start at higher input levels resize and or relocate the gas controls A flame monitoring system consists of two m...

Страница 17: ...and is not interrupted when a flame signal is detected during trial for ignition ImmersoJet burners are sold in these configurations Burner with integral low pressure blower Burner with integral high pressure blower Burner less blower n Note This section describes how to size a blower for burners purchased less blower S S S S STEP TEP TEP TEP TEP 6 6 6 6 6 COMBUSTION AIR SYSTEM Effects of atmosphe...

Страница 18: ...at high fire Combustion air blowers are normally rated in terms of standard cubic feet per hour scfh of air An example calculation follows the information tables below Series SMJ turbo blower COMBUSTION AIR SYSTEM CONTINUED DESCRIPTION UNIT OF MEASURE FORMULA SYMBOL Total system heat input Btu hr Q Number of burners Type of fuel Gross heating value of fuel Btu ft3 q Desired excess air percentage p...

Страница 19: ...flow V gas Q q 1 225 000 Btu hr 1 002 Btu ft3 1 223 ft3 hr Gas flow of 1 223 ft3 hr is required c Calculate the required stoichiometric air flow V air stoichiometric a air gas ratio xVgas 9 41 x 1 223 ft3 hr 11 508 ft3 hr Stoichiometric air flow of 11 508 scfh required d Calculate the final blower air flow requirement based on 15 excess air at high fire V air 1 excess air xV air stoichiometric 1 0...

Страница 20: ...sure switches in Blower Bulletin 610 w Warning Eclipse Combustion supports NFPA regulations which require the use of an air pressure switch in conjunction with other safety components as a minimum standard for main gas safety shut off systems Consult Eclipse Eclipse can help you design and obtain a main gas shut off valve train that complies with the current safety standards The shut off valve tra...

Страница 21: ...enheit F C x 1 8 32 kilogram kg pound lb 2 205 kilowatt kW Btu hr 3414 meter m foot ft 3 28 millibar mbar inches water column wc 0 401 millibar mbar pounds sq in psi 14 5 x 10 3 millimeter mm inch in 3 94 x 10 2 English to Metric FROM TO MULTIPLY BY Btu hr kilowatt kW 0 293 x 10 3 cubic foot ft3 cubic meter m3 2 832 x 10 2 cubic foot hour cfh cubic meter hour m3 h 2 832 x 10 2 degrees Fahrenheit F...

Страница 22: ... The air pressure switch gives a signal to the safety system when there is not enough air pressure from the blower Gas cocks are used to manually shut off the gas supply on both sides of the main gas shut off valve train Solenoid valves are used to automatically shut off the gas supply on a bypass gas system or on small capacity burner systems Manual butterfly valves are used to balance the air or...

Страница 23: ...ressure sensing line the impulse line This impulse line is connected between the top of the ratio regulator and the air supply line The cap must stay on the ratio regulator after adjustment A CRS valve is used in a high low time proportional control system to quickly open and close the air supply The schematics show the advised positions of the pressure taps The impulse line connects the ratios re...

Страница 24: ...Litho in U S A Design Guide 330 10 02 ...

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