Eclipse ThermJet TJ0015 - 2000 Technical Information

Eclipse ThermJet Burners

Model TJ0015 - 2000

Technical Information Edition 2.14

Version 2

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: 815-877-3031 Fax: 815-877-3336 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

WARNING

CAUTION

NOTICE

NOTE

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.

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

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

ThermJet Documents ........................................................................................................... 4

Related Documents.............................................................................................................. 4

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

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

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

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

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

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

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

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

Step 2: Control Methodology................................................................................................ 7

Step 3: Ignition System ........................................................................................................ 12

Step 4: Flame Monitoring Control System............................................................................ 14

Step 5: Combustion Air System (Blower and Air Pressure Switch)...................................... 14

Step 6: Main Gas Shut-Off Valve Train ................................................................................ 16

Step 7: Process Temperature Control System..................................................................... 16

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

System Schematics.................................................................................................................. ii

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

3ThermJet, V2, Technical Information, Edition 2.14

Introduction

Product Description

The ThermJet is a nozzle-mix burner that is designed to fire an intense stream of hot gases through a combustor using ambient combustion air.

The high velocity of the gases improves temperature uniformity product quality and system efficiency.

The ThermJet Burner comes in two types:

• High Velocity (HV)

• Medium Velocity (MV)

Flame velocity information is available in Datasheets 205-1 through 205-13.

The gas velocity can be as high as 500 ft/s for the High Velocity burner, and 250 ft/s for the Medium Velocity burner.

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.

Purpose

The purpose of this manual is to make sure that you carry out the installation of a safe, effective, and trouble-free system.

ThermJet Documents

Design Guide No. 205

• This document

Datasheet No. 205-1 through 205-13

• Available for individual TJ models

• Required to complete design calculations in this guide

Installation Guide No. 205

• Used with Datasheets to complete installation

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.

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.

System Design

Design

Designing a burner system is a straight-forward exercise of combining modules that add up to a reliable and safe system.

The design process is divided into the following steps:

1. Burner model selection:

2. Control Methodology

3. Ignition System

4. Flame Monitoring System

5. Combustion Air System

6. Main gas shut-off valve train selection

7. Process temperature control system

Step 1: Burner Model Selection

Burner Size and Quantity

Select the size and number of burners based on the heat balance. For heat balance calculations, refer to the Combustion Engineering Guide (EFE 825).

Use the ThermJet Price List 205 and Datasheet series 205 for performance data, dimensions, and specifications.

Flame Velocity

Each burner size comes in two versions, High or Medium Velocity. Select the version needed based on requirements for temperature uniformity, circulation, chamber size, air pressure and overall operating costs.

Flame velocity information is available in Datasheets 205-1 through 205-13.

Fuel Type

Table 3.1 Fuel Type

Fuel Symbol

Natural

Gas

Propane C3H

Butane C4H

Btu/ft3 @ standard conditions (MJ/m3 @ normal conditions)

If using an alternative fuel supply, contact Eclipse with an accurate breakdown of the fuel components.

90%+

Gross Heating

(101.2 MJ/m

(133.7 MJ/m

Value

1000 Btu/ft

(40.1 MJ/m

2525 Btu/ft3

3330 Btu/ft3

)

Specific

Gravity

WOBBE

Index

0.60

1.55 2028

2.09 2303

1290

Btu/ft

Fuel Pressure

The gas pressure must be at the minimum level shown.

The required gas pressure at the burner can be found in ThermJet Datasheets 205-1 through 205-13.

Combustor Type

The combustor that you choose depends on the temperature and the construction of the furnace.

The furnace temperature limits of the combustors can be found in ThermJet Datasheets 205-1 through 205-13.