WO2006070392A1 - Cooling system - Google Patents

Cooling system Download PDF

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Publication number
WO2006070392A1
WO2006070392A1 PCT/IN2004/000425 IN2004000425W WO2006070392A1 WO 2006070392 A1 WO2006070392 A1 WO 2006070392A1 IN 2004000425 W IN2004000425 W IN 2004000425W WO 2006070392 A1 WO2006070392 A1 WO 2006070392A1
Authority
WO
WIPO (PCT)
Prior art keywords
flue gas
tubular means
furnace
air
cooling system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IN2004/000425
Other languages
French (fr)
Inventor
Ashish Mukherjee
Subhasis Biswas
Manish Kumar
Santi Gopal Sahu
Ashim Choudhury
Kalyan Sen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Council of Scientific and Industrial Research CSIR
Original Assignee
Council of Scientific and Industrial Research CSIR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Council of Scientific and Industrial Research CSIR filed Critical Council of Scientific and Industrial Research CSIR
Priority to PCT/IN2004/000425 priority Critical patent/WO2006070392A1/en
Publication of WO2006070392A1 publication Critical patent/WO2006070392A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/101—Baghouse type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/40—Intercepting solids by cyclones

Definitions

  • the present invention relates to a cooling system.
  • This invention particularly relates to a system for cooling flue gas coming out of a pulverised coal fired furnace.
  • the invention finds its usage in studying combustion behaviour and constituents of flue gas resulting from combustion of pulverised fuel and reducing its temperature while coming out of a furnace. Background of the invention
  • Experimental furnaces are generally used to simulate combustion and deposition conditions in pulverised fuel boilers.
  • the essential characteristics of such reactors are heating rate, high temperature, dynamic particle phase and atmosphere simulating conditions; for example, essential components of a vertical drop tube furnace system include a fuel feeder, a reactor and equipment for sampling and analysis.
  • the drop tube furnace is a valuable tool when attempting to simulate coal combustion on a small scale.
  • pulverised coal is carried down through a water-cooled feeder into a heated ceramic tube containing preheated air. After passing through the tube the particles are collected in water-cooled probe in different zones where the reactions are effectively quenched.
  • the flue gas generated from the combustion of coal is passed through the cooling system having water and air jackets for cooling.
  • the flue gas is sucked from the furnace using ID fan to dispose it off to atmosphere.
  • the cooling system reduces the temperature of the flue gas from about 1000 degree Celsius to approximately 50 degree Celsius.
  • the flow of these gases is kept sufficiently low to ensure that laminar flow conditions are met. Turbulent flow would cause the reduction of collection efficiently and the lowering of the sample integrity.
  • the degree of decomposition experienced by the particles depends on conditions within the furnace. The residence time inside the furnace, oxygen content and the temperature can be altered as per the requirements.
  • the main object of the invention is to provide a cooling system for the flue gas of furnaces like Drop Tube Furnace, which obviates the above mentioned drawbacks.
  • Another object of the invention is to provide a cooling system for flue gas of a furnace wherein temperature of flue gas is reduced to a temperature where an online gas analyser can be attached before ID fan.
  • FIG. 1 is a schematic diagram of the cooling system of the invention. Summary of the invention
  • the present invention provides a cooling system for a furnace flue gas, the system comprising a tubular means with a furnace connecting end and an outlet end, and provided connected to the furnace, a water jacket (1) being connected at the furnace end and concentric with the tubular means to cool bottom ash falling in a bottom ash collector (2) connected to the tubular means, an air supply means (4) to supply air to one or more air jackets (9) positioned concentrically with the tubular means downstream of the water jacket, a gas analyser line (3) for oxygen and CO being provided downstream of the ash collector and connected to the tubular means, an induced draft fan (7) connected to the outlet end of the tubular means and operatively associated with a bag filter (6) and a cyclone (5) to remove flue gas and pass it through a chimney (8) connected to the outlet end of the tubular means into the atmosphere, fly ash being collected in the filter bag and cyclone.
  • the cooling system is used in conjunction with a Drop Tube Furnace for cooling of flue gas.
  • the air supply means is a blower.
  • the present invention also provides a method for cooling of flue gas from a furnace using a cooling system comprising a tubular means with a furnace connecting end and an outlet end, and provided connected to the furnace, a water jacket (1) being connected at the furnace end and concentric with the tubular means to cool bottom ash falling in a bottom ash collector (2) connected to the tubular means, an air supply means (4) to supply air to one or more air jackets (9) positioned concentrically with the tubular means downstream of the water jacket, a gas analyser line (3) for oxygen and CO being provided downstream of the ash collector and connected to the tubular means, an induced draft fan (7) connected to the outlet end of the tubular means and operatively associated with a bag filter (6) and a cyclone (5) to remove flue gas and pass it through a chimney (8) connected to the outlet end of the tubular means, the method comprising passing high temperature flue gas from a furnace through the tubular means surrounded by a water jacket (1) to cool down the flue gas and the ash contained therein and to
  • the flue gas temperature is reduced from about 1000 0 C to 50 0 C.
  • the cooling system is used in conjunction with a Drop Tube Furnace for cooling of flue gas.
  • the cooling system of the invention essentially comprises a tube provided connected to the flue gas line of a furnace.
  • the tube is provided at this furnace connecting end with a water jacket (1) concentric with the tube so that the bottom ash which is falling in the bottom ash collector (2) is cooled.
  • An air blower (4) is connected downstream of the ash collector (2) to supply air to one or more air jacket (9) which are provided concentric with the tube through which the flue gas is passing.
  • a gas analyser line for O 2 CO gas is provided to monitor the content of the flue gas.
  • An induced draft fan (7) is positioned for the cooling system after bag filter (6) and cyclone (5) to suck the flue gas and successively the flue gas passes through the chimney (8) and goes to the open atmosphere and fly ash which is flowing with the flue gas gets collected in the cyclone and bag filter.
  • the flue gas temperature can be reduced from about 1000 0 C to 50 0 C.
  • the cooling system is useful for furnaces, like Drop Tube Furnace, for cooling of flue gas.
  • the high temperature flue gas from the furnace passes through the tube surrounded with the water jacket (1) it cools down the flue gas and the ash containing with it so that the temperature of he bottom ash also drops. While passing through the cooling system the flue gas release its heat to the air passing through air jacket (9). The air jacket is getting air by the air blower (4).
  • the cooling system is provided with a line for O 2 , CO gas analyser (3). While passing through the cooling system the ash being carried by the flue gas get collected in the cyclone (5) and bag filter (6) as fly ash. The flue gas in the cooling system is being sucked by the ID fan (7). ID fan throws the flue gas to the chimney (8) through which the flue gas disposes to the atmosphere.
  • the novelty of the invention lies providing a cooling system for the flue gas of the furnaces, like Drop Tube Furnace in which the temperature of the flue gas is reduced to a temperature at which online gas analyser can be attached before ID fan and the inventive step lies in the non-obvious steps of the process.
  • Example 1 is given by way of illustration of the present invention and should not be construed to limit the scope of the present invention.
  • High temperature flue gas from a Drop Tube furnace is passed through a tube surrounded with a water jacket to cool down the flue gas and the ash contained therein resulting in the temperature of the bottom ash also dropping. While passing through the cooling system the flue gas releases its heat to air passing through an air jacket. The air jacket is provided with air by an air blower connected thereto. The oxygen and CO content of the flue gas is monitored by a line for O 2 , CO gas analyser provided downstream of the ash collector and air jacket. While passing through the cooling system the ash being carried by the flue gas is collected in the cyclone and bag filter as fly ash. The flue gas in the cooling system is sucked by the ID fan, which then throws the flue gas to the chimney (8) through which the flue gas disposes to the atmosphere. The following were the parameters of this example:
  • High temperature flue gas from a Drop Tube furnace is passed through a tube surrounded with a water jacket to cool down the flue gas and the ash contained therein resulting in the temperature of the bottom ash also dropping. While passing through the cooling system the flue gas releases its heat to air passing through an air jacket. The air jacket is provided with air by an air blower connected thereto. The oxygen and CO content of the flue gas is monitored by a line for O 2 , CO gas analyser provided downstream of the ash collector and air jacket. While passing through the cooling system the ash being carried by the flue gas is collected in the cyclone and bag filter as fly ash. The flue gas in the cooling system is sucked by the ID fan, which then throws the flue gas to the chimney (8) through which the flue gas disposes to the atmosphere. The following were the parameters of this example:
  • Cooling system output temperature 75 0 C The main advantages of the present invention are
  • the system involves high temperature reduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chimneys And Flues (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The present invention relates to a cooling system for cooling flue gas coming out of a pulverised coal fired fornace and finds its usage in studying combustion behaviour and constituents of flue gas resulting from combustion of pulverised fuel and reducing its temperature while coming out of a fornace.

Description

COOLING SYSTEM Field of the invention
The present invention relates to a cooling system. This invention particularly relates to a system for cooling flue gas coming out of a pulverised coal fired furnace. The invention finds its usage in studying combustion behaviour and constituents of flue gas resulting from combustion of pulverised fuel and reducing its temperature while coming out of a furnace. Background of the invention
Experimental furnaces are generally used to simulate combustion and deposition conditions in pulverised fuel boilers. The essential characteristics of such reactors are heating rate, high temperature, dynamic particle phase and atmosphere simulating conditions; for example, essential components of a vertical drop tube furnace system include a fuel feeder, a reactor and equipment for sampling and analysis. The drop tube furnace is a valuable tool when attempting to simulate coal combustion on a small scale. In this furnace pulverised coal is carried down through a water-cooled feeder into a heated ceramic tube containing preheated air. After passing through the tube the particles are collected in water-cooled probe in different zones where the reactions are effectively quenched. The flue gas generated from the combustion of coal is passed through the cooling system having water and air jackets for cooling. The flue gas is sucked from the furnace using ID fan to dispose it off to atmosphere. The cooling system reduces the temperature of the flue gas from about 1000 degree Celsius to approximately 50 degree Celsius. The flow of these gases is kept sufficiently low to ensure that laminar flow conditions are met. Turbulent flow would cause the reduction of collection efficiently and the lowering of the sample integrity. The degree of decomposition experienced by the particles depends on conditions within the furnace. The residence time inside the furnace, oxygen content and the temperature can be altered as per the requirements.
Prior art search for a system for cooling flue gas coming out of a pulverised coal fired furnace was done based on literature survey and patent databases and did not yield any relevant references. Objects of the invention
The main object of the invention is to provide a cooling system for the flue gas of furnaces like Drop Tube Furnace, which obviates the above mentioned drawbacks.
Another object of the invention is to provide a cooling system for flue gas of a furnace wherein temperature of flue gas is reduced to a temperature where an online gas analyser can be attached before ID fan. Brief description of the accompany drawing
Figure 1 is a schematic diagram of the cooling system of the invention. Summary of the invention
Accordingly the present invention provides a cooling system for a furnace flue gas, the system comprising a tubular means with a furnace connecting end and an outlet end, and provided connected to the furnace, a water jacket (1) being connected at the furnace end and concentric with the tubular means to cool bottom ash falling in a bottom ash collector (2) connected to the tubular means, an air supply means (4) to supply air to one or more air jackets (9) positioned concentrically with the tubular means downstream of the water jacket, a gas analyser line (3) for oxygen and CO being provided downstream of the ash collector and connected to the tubular means, an induced draft fan (7) connected to the outlet end of the tubular means and operatively associated with a bag filter (6) and a cyclone (5) to remove flue gas and pass it through a chimney (8) connected to the outlet end of the tubular means into the atmosphere, fly ash being collected in the filter bag and cyclone.
In one embodiment of the invention the cooling system is used in conjunction with a Drop Tube Furnace for cooling of flue gas.
In yet another embodiment of the invention, the air supply means is a blower.
The present invention also provides a method for cooling of flue gas from a furnace using a cooling system comprising a tubular means with a furnace connecting end and an outlet end, and provided connected to the furnace, a water jacket (1) being connected at the furnace end and concentric with the tubular means to cool bottom ash falling in a bottom ash collector (2) connected to the tubular means, an air supply means (4) to supply air to one or more air jackets (9) positioned concentrically with the tubular means downstream of the water jacket, a gas analyser line (3) for oxygen and CO being provided downstream of the ash collector and connected to the tubular means, an induced draft fan (7) connected to the outlet end of the tubular means and operatively associated with a bag filter (6) and a cyclone (5) to remove flue gas and pass it through a chimney (8) connected to the outlet end of the tubular means, the method comprising passing high temperature flue gas from a furnace through the tubular means surrounded by a water jacket (1) to cool down the flue gas and the ash contained therein and to cool the temperature of the bottom ash, passing the flue gas through the tubular means to dissipate heat therefrom into air being input into the tubular system from one or more air jackets (9) provided with an air supply means (4), the flue gas being monitored for O2, CO gas content through a gas analyser (3) connected downstream of the ash collector (2), fly ash being carried by the flue gas being collected in a cyclone (5) and bag filter (6) provided downstream of the air jacket(s), the cooled flue gas being then sucked by an induced draft fan (7) connected at the outlet end of the tubular means and passed through to a chimney (8) to dissipate into the atmosphere.
In one embodiment of the invention the flue gas temperature is reduced from about 10000C to 500C.
In another embodiment of the invention the cooling system is used in conjunction with a Drop Tube Furnace for cooling of flue gas. Detailed description of the invention
The present invention will now be described in detail with reference to the accompanying drawing. In Figure 1 the components are referenced by:
1. Water Jacket
2. Bottom Ash Collector
3. Line for O2, CO analyser
4. Air Blower for Cooling
5. Cyclone
6. Bag Filter
7. ID Fan
8. Chimney
9. Air Jacket
The cooling system of the invention essentially comprises a tube provided connected to the flue gas line of a furnace. The tube is provided at this furnace connecting end with a water jacket (1) concentric with the tube so that the bottom ash which is falling in the bottom ash collector (2) is cooled. An air blower (4) is connected downstream of the ash collector (2) to supply air to one or more air jacket (9) which are provided concentric with the tube through which the flue gas is passing. In the flue gas line, a gas analyser line for O2, CO gas is provided to monitor the content of the flue gas. An induced draft fan (7) is positioned for the cooling system after bag filter (6) and cyclone (5) to suck the flue gas and successively the flue gas passes through the chimney (8) and goes to the open atmosphere and fly ash which is flowing with the flue gas gets collected in the cyclone and bag filter.
By the system of the invention, the flue gas temperature can be reduced from about 10000C to 500C. The cooling system is useful for furnaces, like Drop Tube Furnace, for cooling of flue gas.
The high temperature flue gas from the furnace passes through the tube surrounded with the water jacket (1) it cools down the flue gas and the ash containing with it so that the temperature of he bottom ash also drops. While passing through the cooling system the flue gas release its heat to the air passing through air jacket (9). The air jacket is getting air by the air blower (4). The cooling system is provided with a line for O2, CO gas analyser (3). While passing through the cooling system the ash being carried by the flue gas get collected in the cyclone (5) and bag filter (6) as fly ash. The flue gas in the cooling system is being sucked by the ID fan (7). ID fan throws the flue gas to the chimney (8) through which the flue gas disposes to the atmosphere.
The novelty of the invention lies providing a cooling system for the flue gas of the furnaces, like Drop Tube Furnace in which the temperature of the flue gas is reduced to a temperature at which online gas analyser can be attached before ID fan and the inventive step lies in the non-obvious steps of the process.
The following examples are given by way of illustration of the present invention and should not be construed to limit the scope of the present invention. Example 1
High temperature flue gas from a Drop Tube furnace is passed through a tube surrounded with a water jacket to cool down the flue gas and the ash contained therein resulting in the temperature of the bottom ash also dropping. While passing through the cooling system the flue gas releases its heat to air passing through an air jacket. The air jacket is provided with air by an air blower connected thereto. The oxygen and CO content of the flue gas is monitored by a line for O2, CO gas analyser provided downstream of the ash collector and air jacket. While passing through the cooling system the ash being carried by the flue gas is collected in the cyclone and bag filter as fly ash. The flue gas in the cooling system is sucked by the ID fan, which then throws the flue gas to the chimney (8) through which the flue gas disposes to the atmosphere. The following were the parameters of this example:
Rate of flue gas 138 lpm
Cooling system input temperature 11200C
Cooling system output temperature 600C Example 2
High temperature flue gas from a Drop Tube furnace is passed through a tube surrounded with a water jacket to cool down the flue gas and the ash contained therein resulting in the temperature of the bottom ash also dropping. While passing through the cooling system the flue gas releases its heat to air passing through an air jacket. The air jacket is provided with air by an air blower connected thereto. The oxygen and CO content of the flue gas is monitored by a line for O2, CO gas analyser provided downstream of the ash collector and air jacket. While passing through the cooling system the ash being carried by the flue gas is collected in the cyclone and bag filter as fly ash. The flue gas in the cooling system is sucked by the ID fan, which then throws the flue gas to the chimney (8) through which the flue gas disposes to the atmosphere. The following were the parameters of this example:
Rate of flue gas 184 lpm
Cooling system input temperature 11900C
Cooling system output temperature 750C The main advantages of the present invention are
1. The system involves high temperature reduction.
2. It consists of facility for collection of both bottom ash and fly ash.
3. It contains less wear and tear of system components due to laminar flow of flue gas.
4. Maintenance is very easy and cost effective.

Claims

We claim:
1. A cooling system for a furnace flue gas, the system comprising a tubular means with a furnace connecting end and an outlet end, and provided connected to the furnace, a water jacket (1) being connected at the furnace end and concentric with the tubular means to cool bottom ash falling in a bottom ash collector (2) connected to the tubular means, an air supply means (4) to supply air to one or more air jackets (9) positioned concentrically with the tubular means downstream of the water jacket, a gas analyser line (3) for oxygen and CO being provided downstream of the ash collector and connected to the tubular means, an induced draft fan (7) connected to the outlet end of the tubular means and operatively associated with a bag filter (6) and a cyclone (5) to remove flue gas and pass it through a chimney (8) connected to the outlet end of the tubular means into the atmosphere, fly ash being collected in the filter bag and cyclone.
2. A system as claimed in claim 1 wherein the cooling system is used in conjunction with a Drop Tube Furnace for cooling of flue gas.
3. A system as claimed in claim 1 wherein the air supply means is a blower.
4. A method for cooling of flue gas from a furnace using a cooling system comprising a tubular means with a furnace connecting end and an outlet end, and provided connected to the furnace, a water jacket (1) being connected at the furnace end and concentric with the tubular means to cool bottom ash falling in a bottom ash collector (2) connected to the tubular means, an air supply means (4) to supply air to one or more air jackets (9) positioned concentrically with the tubular means downstream of the water jacket, a gas analyser line (3) for oxygen and CO being provided downstream of the ash collector and connected to the tubular means, an induced draft fan (7) connected to the outlet end of the tubular means and operatively associated with a bag filter (6) and a cyclone (5) to remove flue gas and pass it through a chimney (8) connected to the outlet end of the tubular means, the method comprising passing high temperature flue gas from a furnace through the tubular means surrounded by a water jacket (1) to cool down the flue gas and the ash contained therein and to cool the temperature of the bottom ash, passing the flue gas through the tubular means to dissipate heat therefrom into air being input into the tubular system from one or more air jackets (9) provided with an air supply means (4), the flue gas being monitored for O2, CO gas content through a gas analyser (3) connected downstream of the ash collector (2), fly ash being carried by the flue gas being collected in a cyclone (5) and bag filter (6) provided downstream of the air jacket(s), the cooled flue gas being then sucked by an induced draft fan (7) connected at the outlet end of the tubular means and passed through to a chimney (8) to dissipate into the atmosphere.
5. A method as claimed in claim 4 wherein the flue gas temperature is reduced from about 10000C to 500C.
6. A method as claimed in claim 4 wherein the cooling system is used in conjunction with a Drop Tube Furnace for cooling of flue gas.
7. A method as claimed in claim 4 wherein the system reduces the temperature of flue gas up to 20 times the temperature observed at the time of entering the system.
PCT/IN2004/000425 2004-12-28 2004-12-28 Cooling system Ceased WO2006070392A1 (en)

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Application Number Priority Date Filing Date Title
PCT/IN2004/000425 WO2006070392A1 (en) 2004-12-28 2004-12-28 Cooling system

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Application Number Priority Date Filing Date Title
PCT/IN2004/000425 WO2006070392A1 (en) 2004-12-28 2004-12-28 Cooling system

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099019A (en) * 1976-08-24 1978-07-04 Joetsu Denro Kogyo Co., Ltd. Electric furnace waste heat recovery method and apparatus
EP0421820A2 (en) * 1989-10-05 1991-04-10 Ishikawajima-Harima Heavy Industries Co., Ltd. Fluidized-bed combustion furnace
US5086715A (en) * 1989-06-29 1992-02-11 W&E Umwelttechnik Ag Process for incinerating heterogeneous combustible material
US5108461A (en) * 1984-12-17 1992-04-28 Ruthner Michael J Process for producing ceramic powders
DE19918927A1 (en) * 1999-04-26 2000-11-02 Dieter Steinbrecht Burning plastic waste containing polyvinyl chloride (PVC) in fluidized bed combustor include fine shredding and addition of calcium oxide powder
US20030223071A1 (en) * 2002-05-30 2003-12-04 Florida Power & Light Company Systems and methods for determining the existence of a visible plume from the chimney of a facility burning carbon-based fuels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099019A (en) * 1976-08-24 1978-07-04 Joetsu Denro Kogyo Co., Ltd. Electric furnace waste heat recovery method and apparatus
US5108461A (en) * 1984-12-17 1992-04-28 Ruthner Michael J Process for producing ceramic powders
US5086715A (en) * 1989-06-29 1992-02-11 W&E Umwelttechnik Ag Process for incinerating heterogeneous combustible material
EP0421820A2 (en) * 1989-10-05 1991-04-10 Ishikawajima-Harima Heavy Industries Co., Ltd. Fluidized-bed combustion furnace
DE19918927A1 (en) * 1999-04-26 2000-11-02 Dieter Steinbrecht Burning plastic waste containing polyvinyl chloride (PVC) in fluidized bed combustor include fine shredding and addition of calcium oxide powder
US20030223071A1 (en) * 2002-05-30 2003-12-04 Florida Power & Light Company Systems and methods for determining the existence of a visible plume from the chimney of a facility burning carbon-based fuels

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