Eclipse TFB030, TFB075, TFB200 User Manual

Design Guide 310

11/14/2014

Eclipse Tube Firing

Burners

Models TFB030, TFB075, TFB200

Version 2

TFB030-075

TFB200

Copyright

Copyright 2007 by Eclipse, inc. All rights reserved
worldwide. This publication is protected by federal
regulation and shall not be copied, distributed,
transmitted, transcribed or translated into any human or
computer language, in any form or by any means, to any
third parties, without the express written consent of
Eclipse, inc.

Disclaimer Notice

In accordance with the manufacturer’s policy of continual
product improvement, the product presented in this
brochure is subject to change without notice or obligation.

The material in this manual is believed adequate for the
intended use of the product. If the product is used for
purposes other than those specified herein, confirmation
of validity and suitability must be obtained. Eclipse
warrants that the product itself does not infringe upon any
United States patents. No further warranty is expressed or
implied.

Liability & Warranty

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
Technical Documentation Specialist.

It must be understood that Eclipse’s liability for its product,
whether due to breach of warranty, negligence, strict
liability, or otherwise is limited to the furnishing of
replacement parts and Eclipse will not be liable for any
other injury, loss, damage or expenses, whether direct or
consequential, including but not limited to loss of use,

income, or damage to material arising in connection with
the sale, installation, use of, inability to use, or the repair
or replacement of Eclipse’s products.

Any operation expressly prohibited in this manual, any
adjustment, or assembly procedures not recommended or
authorized in these instructions shall void the warranty.

Document Conventions

There are several special symbols in this document. You
must know their meaning and importance.

The explanation of these symbols follows below. Please
read it thoroughly.

How To Get Help

If you need help, contact your local Eclipse
representative. You can also contact Eclipse at:

1665 Elmwood Rd.
Rockford, Illinois 61103 U.S.A.
Phone: [phone]
Fax: [phone]
http://www.eclipsenet.com

Please have the information on the product label available
when contacting the factory so we may better serve you.

www.eclipsenet.com

Product Name
Item #
S/N
DD MMM YYYY

This is the safety alert symbol. It is used to alert you to potential personal
injurt hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death.

Indicates a hazardous situation which, if not avoided, will result in death
or serious injury.

WARNING

CAUTION

NOTICE

NOTE

2

Indicates a hazardous situation which, if not avoided, could result in
death or serious injury.

Indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.

Is used to address practices not related to personal injury.

Indicates an important part of text. Read thoroughly.

Table of Contents

1 Introduction............................................................................................................................ 4

Product Description.............................................................................................................. 4

Audience .............................................................................................................................. 4

TFB Documents ...................................................................................................................4

Purpose................................................................................................................................ 4

2 Safety...................................................................................................................................... 5

Safety Warnings................................................................................................................... 5

Capabilities........................................................................................................................... 5

Operator Training................................................................................................................. 5

Replacement Parts...............................................................................................................5

3 System Design....................................................................................................................... 6

Design.................................................................................................................................. 6

Step 1: Burner Selection...................................................................................................... 6

Step 2: Control Methodology ............................................................................................... 10

Step 3: Ignition System........................................................................................................ 11

Step 4: Flame Monitoring Control System ........................................................................... 11

Step 5: Combustion Air System: Blower and Air Pressure Switch....................................... 12

Step 6: Main Gas Shut-Off Valve Train ............................................................................... 13

Step 7: Process Temperature Control System .................................................................... 13

Appendix ................................................................................................................................... i

Conversion Factors..............................................................................................................i

System Schematics.................................................................................................................. iii

Notes.......................................................................................................................................... iv

Eclipse TFB, V2, Design Guide 310, 11/14/2014

3

Introduction

1

Product Description

The TFB is a nozzle-mixing burner designed for tube firing
applications with multiple fuel capability. The burner
consists of a housing, rear cover, air and fuel inlet blocks,
spark rod, flame rod (if selected), UV scanner adapter (if
selected), gas tube, nozzle and air shroud.

Burner design provides:

• Adjustable air shroud to maintain correct air velocity
for different sized tube applications and fuels.

• Uniform tube temperatures for extending tube life.

Heat Exchanger

The TFB can be used with or without an exhaust leg
recuperator. An exhaust leg recuperator is a heat
exchanger that transfers heat from the exhaust air to the
combustion air. Preheating the combustion air can
increase the fuel efficiency by as much as 20%. The TFB
can handle combustion air temperatures up to 1000°F.
The recommended recuperators for the TFB are the
Eclipse Bayonet (Data 317) and the Bayonet-Ultra (Spec.

318).

Audience

This manual has been written for people who are already
familiar with all aspects of a nozzle-mix burner and its add­on components, also referred to as “the burner system”.

These aspects are:

• Design

• Selection

• Use

• Maintenance

The audience is expected to have previous experience
with this type of equipment.

TFB Documents

Design Guide No. 310

• This document

Datasheet, Series No. 310-1 through 310-3

• Available for individual TFB models

• Required to complete installation

Installation Guide No. 310

• Used with Datasheet to complete installation

Worksheet No. 310

• Required to provide application information to
Eclipse Engineering

TFB030-075

Related Documents

• EFE 825 (Combustion Engineering Guide)

• Eclipse Bulletins and Info Guides: 610, 710, 720,
730, 742, 744, 760, 930, I-354

Purpose

TFB200

Figure 1.1. TFB Burner

4

The purpose of this manual is to make sure that the design
of a safe, effective, and trouble free combustion system is
carried out.

Eclipse TFB, V2, Design Guide 310, 11/14/2014

Safety

Important notices which help provide safe burner
operation will be found in this section. To avoid personal
injury and damage to the property or facility, the following
warnings must be observed. All involved personnel should
read this entire manual carefully before attempting to start
or operate this system. If any part of the information in this
manual is not understood, contact Eclipse before
continuing.

Safety Warnings

DANGER

■ The burners, described herein, are designed to mix
fuel with air and burn the resulting mixture. All fuel
burning devices are capable of producing fires and
explosions if improperly applied, installed,
adjusted, controlled or maintained.

■ Do not bypass any safety feature; fire or explosion
could result.

■ Never try to light a burner if it shows signs of
damage or malfunction.

WARNING

■ The burner and duct sections are likely to have
HOT surfaces. Always wear the appropriate
protective equipment when approaching the
burner.

2

NOTICE

■ This manual provides information regarding the
use of these burners for their specific design
purpose. Do not deviate from any instructions or
application limits described herein without written
approval from Eclipse.

Capabilities

Only qualified personnel, with sufficient mechanical
aptitude and experience with combustion equipment,
should adjust, maintain or troubleshoot any mechanical or
electrical part of this system. Contact Eclipse for any
needed commissioning assistance.

Operator Training

The best safety precaution is an alert and trained
operator. Train new operators thoroughly and have them
demonstrate an adequate understanding of the
equipment and its operation. A regular retraining schedule
should be administered to ensure operators maintain a
high degree of proficiency. Contact Eclipse for any needed
site-specific training.

Replacement Parts

Order replacement parts from Eclipse only. All Eclipse
approved valves or switches should carry UL, FM, CSA,
CGA and/or CE approval where applicable.

■ Eclipse products are designed to minimize the use
of materials that contain crystalline silica.
Examples of these chemicals are: respirable
crystalline silica from bricks, cement or other
masonry products and respirable refractory
ceramic fibers from insulating blankets, boards, or
gaskets. Despite these efforts, dust created by
sanding, sawing, grinding, cutting and other
construction activities could release crystalline
silica. Crystalline silica is known to cause cancer,
and health risks from the exposure to these
chemicals vary depending on the frequency and
length of exposure to these chemicals. To reduce
the risk, limit exposure to these chemicals, work in
a well-ventilated area and wear approved personal
protective safety equipment for these chemicals.

5

System Design

3

Design
Design Structure

Designing a burner system is a straight-forward exercise
of combining steps that add up to a reliable and safe
system. These steps are:

1. Burner Selection and Tube Design

2. Control Methodology

3. Ignition System

4. Flame Monitoring System

5. Combustion Air System: Blower & Air Pressure
Switch

6. Main Gas Shut-Off Valve Train

7. Process Temperature Control System

Step 1: Burner Selection

The design of a combustion system for radiant tubes and
immersion tubes is significantly different. For this reason,
we have divided the process for burner selection into two
separate sections:

• Step 1a: Radiant Tube Burner Application on page 6

• Step 1b: Immersion Tube Burner Application on

page 8

All individual burner performance data including
dimensions, capacities, operating parameters, and
emissions information can be found in the following
Datasheets:

Step 1a: Radiant Tube Burner Application

Calculate the required heat release per tube.

Given the net heat requirement of the furnace (BTU/hr),
divide by the number of radiant tubes to determine the
required heat release per tube.

Calculate the tube surface area.

The burner radiants its heat to the process through the
wall of the tube. To calculate the required burner input you
must know the total area of the tube inside the furnace.

To calculate the tube surface area, use this formula:

Tube Surface Area = OD x  x n x L

• OD = the outside diameter of the tube in inches

•  = 3.142

• n = number of tube legs

- 2 for a U-Tube

- 3 for a trident tube

- 4 for a W-tube

• L = the total length of each leg in inches

U-tube

Trident tube

• 310-1 Datasheet TFB030

• 310-2 Datasheet TFB075

• 310-3 Datasheet TFB200

Fuel Type

The usable fuel types are:

• Natural Gas

• Propane

• Butane

For other fuels, contact Eclipse with an accurate
breakdown of the fuel contents.

Air Type

• Ambient

• Preheat

6

W-tube

L

Figure 3.1.

Determine the Maximum Heat Transfer Rate

The maximum heat transfer rate is the maximum amount
of heat that the tube can radiate to the process per time
unit.

Eclipse TFB, V2, Design Guide 310, 11/14/2014