Basic Envirotech Inc.

Home Feedback

BASIC® Technology
Home ]

 

 

 

BASIC® Technology for Combustion of Solid Wastes 

click image for full size
click image for full size (49 kb)
 

Content

1. Introduction

2. Description

2.1 The patented Pulse Hearth® stoker
2.2 The patented three stage combustion
2.3 High heat transfer efficiency

3. Features

3.1 The unique Pulse Hearth® stoker and primary combustion chamber
3.2 Patented three stage combustion
3.3 Waste to energy

4. Plant capacity range

5. Examples

6. Information Request Form
  

 1 Introduction

BASIC®  waste to energy incineration systems are utilized in a wide range of applications to convert varying waste streams, from low calorific value high moisture materials to high calorific plastics and rubber materials.
The system is used in many applications to process medical wastes, MSW, industrial wastes, and even whole rubber tires are used as the primary fuel source.
BASIC® incineration systems consist of Pulse Hearth® combustor systems ranging from about 100 kg/h to 8'000 kg/h of waste throughput capacity in standard sized systems. Multiple lines may be used in parallel to increase the capacity. All BASIC® units are configured to maintain their nominal capacity in continuous operation of twenty-four hours per day.

 
click image for full size
click image for full size (44 kb)
Three stage incineration
Emissions tests on BASIC® incineration systems prove their outstanding combustion efficiency. Carbon monoxide, hydrocarbon, and NOx level remain significantly below established statutory guidelines, while processing many difficult types of solid waste fuel, including medical waste or rubber tires. Independent tests of BASIC® incineration systems have proved the total emissions from combustion of solid wastes in a BASIC® incineration system can be significantly lower than those generated by industrial boilers fired on natural gas and other competitive incineration systems.
BASIC® incineration systems in combination with selected flue gas treatment systems are customized, depending on the waste stream and the local license requirements.

Back to content

2 Description

2.1 The patented Pulse Hearth® stoker
click image for full size
click image for full size (49 kb)
Pulse Hearth®
 

The Pulse Hearth®  allows the efficient BASIC® combustion system to operate continuously. Unlike with other systems, there are no metal parts located inside the primary combustion chamber. The Pulse Hearth® moves the burning materials through the system while adding air to ensure an effective turbulent mixing effect. The BASIC® Pulse Hearth®  system forms the cornerstone of an efficient waste to energy plant.
click image for full size
click image for full size
click image for full size (37 kb)
click image for full size (34 kb)
Air bag
Refractory Lined Pulse Hearth®
 
Back to content

2.2 The patented three stage combustion
Solid wastes are treated in the multiple stages of combustion system. The staged combustion process results in complete burn-out of hydrocarbons and carbon monoxide with minimal generation of oxides of nitrogen. Each combustion stage is individually controlled by a central process computer.
 
 
High turbulence incineration
click image for full size click image for full size
 click image for full size (38 kb)
click image for full size (50 kb)
Reburn tunnel stage 2 and 3
Section of reburn tunnel
 
Back to content
2.3 High heat transfer efficiency
In waste to energy applications, BASIC® incineration systems employ a novel, patented approach to energy recovery. The primary burning chamber is actually an integral part of the heat recovery boiler and is designed to collect the radiant energy from burning waste fuel. This is the most efficient method of heat transfer. When coupled with a flue gas economizer, energy recovery efficiencies up to 75% and more can be achieved in many applications.

 
click image for full size
click image for full size (44 kb)
BASIC® Pulse Hearth®  incineration system with heat recovery
Back to content
 

3 Features

3.1 The unique Pulse Hearth® stoker and primary combustion chamber
Continuous incineration
Direct bulk feeding of waste (without shredding)
Large range of calorific heat
Main chamber with Pulse Hearth® technology
Hearth bed propulsion motion from outside the furnace with air bag
Pulse motion with self cleaning effect
Dryer hearth system for wet waste
Flexible steel cable support for hearth bed without mechanical friction
Water seal system for hearth bed and deslagger
High destruction efficiency
Incineration chamber, refractory lined, with or without cooling
No metal parts at high temperature / less corrosion / less spare parts
Near stoichiometric air flow / low velocity / low particulate content in the flue gas
Solid refractory heat resistant hearth
Independent hearth air (no air cooling of metallic parts)
Fully automatic wet deslagger system
Proprietary logic control and SCADA system
 
Back to content
3.2 Patented three stage combustion
Stage 2 / Stage 3 post combustion chamber
Stage 4® conditioning of flue gas with recirculation of flue gas for waste heat boiler
Double air wall and design with Thermal Exciter® for high turbulence
Staged air addition / low NOx content
DeNOx, staged incineration as a primary NOx reduction measures,
Possibility of reduction of NOx with ammonia (SNCR or SCR)
High temperature and residence time
High turbulence / excellent burnout of fly ash
Incineration temperature and residence time according to legislation
 
Back to content
3.3 Waste to energy
Radiant water wall main chamber for waste to energy
Heat recovery if desired, typically saturated or superheated steam
Generation of warm water or steam for district heating
Air to air heat exchanger for flue gas conditioning
Convectional waste heat boiler for heat recovery
Economizer for maximum recuperation of heat
Super heater for turbine available for electrical generation
Waste heat boiler, fire-tube or water-tube type, as desired
 
Back to content

4 Plant capacity range (USA units of measure)

Model

Pulse 

Hearths

Capacity

 MMBtu/h

MSW waste
 

lb/h

Medical waste

 

lb/h

Used Tires
 

lb/h

Plastic waste
 

lb/h

300
1
2.4 530 280 190 110
750
1
6.0 1,330 700 480 270
1500
1
12.0 2.670 1,400 960 540
2500
1
20.0 4,440 2,330 1,600 910
3500
2
28.0 6,220 3,260 2,240 1,270
5000
2
40.0 8,880 4,660 3,200 1,820
7000
3
56.0 12,440 6,520 4,480 2,340
10000
4
80.0 17,760 9,320 6,400 3,640
Calorific Value 
Btu/lb
 
4,500 8,600 12,500
22,000

Back to content 

5 Examples

click image for full size
click image for full size
click image for full size
click image for full size
click image for full size (66 kb)
click image for full size (45 kb)
click image for full size (52 kb)
click image for full size (39 kb)
Model 300
Model 3500 Building
Steam Turbine with Generator
Model 3500
 
 


Back to content

 

6 Information Request Form

Select the items that apply, and then let us know how to contact you.

Send technical literature
Send company literature
Have a salesperson contact me

Name
Title
Company
Address
E-mail
Phone

 

Home ]

Send mail to webmaster@basicenvirotech.com with questions or comments about this web site.
Copyright © 2002 Basic Envirotech Inc.
Last modified: January 12, 2005