CC ENGINEERING, INC

CONSULTANT & CONSTRUCTION 

欽總工程股份有限公司

台北市110信義區永吉路179號12樓之1    TEL: 886-2-8787-8763 FAX:886-2-8787-8651

www.cceng.com.tw

首頁 向上 SERVICE

 

 

FBI Reference
Planning factor

 

 

 

 

 

 

 

 

 

 

 Fluidized Bed Incinerator FBI    

                                                                                               

                                                                                Kaohsiung International Airport No.2 Refuse Incinerator

                                                                      


 

Kaohsiung International Airport No.2 Refuse Incinerator

 

LOCATION                        :    Kaohsiung  Taiwan

INSTALLATION                 :     1998

OPERATION                      :  STILL RUNNING

 


 

 

 

 

CONTENT

1. Preface

2. Technical description

3. Procedure

 

 

1. Preface

 

By technical speaking, Fluidized Bed Incinerator FBI is divided into two systems:

1. Bubbling Fluidized Bed System:     a).  Shallow bed system                         b). Deep bed system

2.Circulating Fluidized Bed System:   a).  Single Solid Fluidized Bed system   b). Multi-Solid Fluidized Bed system

 

 

2. Technical description

 

The fluidized bed incinerator can be divided as the bubble-type and circulation-type in using actually, these two application in combustion furnace for many years, but in application on of incinerating, still take bubble-type fluidized bed as the core and have more experience of operating in the world treatment business at present, and there are only few waste treatment experience of part at present in the circulation-type which for harmful waste process system more. 

The typical fluid bed incinerator is by a hollow round tube or the square type tube inside lining with the refractory brick (material) ,And the air distributor with the bed material to make it up. Its structure is like Fig. 1., The basic design parameter of the incinerator is like form one, The stove body equipment  such as  form 2, The air-assign-board design parameter like form three.

The bed material depends on function of the fluid bed, the incineration system bed is often used the sour absorbent material such as the lime stone or the solid particle of inertia, for instance sand, quartz sand, etc.,

The fluidized gas is air used in incineration system. Bed material shall be functioned as fully accumulation of heat, and dispersing the waste and may increase the waste retention time during proceeding.

the fluidized air is entering through bed bottom air-assign-board, causes the bed material and the waste fluidized, at this moment, the bed material are taken shape good mixing by the stirring of air, heating and drying the waste, and owing to the abundant contact with air gets  high combustion efficiency.

The waste will produce the acid gas after burning, in order to reduce the discharge of the acid gas.  we may add the soda absorbent directly (or regards soda absorbent as the bed material directly in the stove).  

Project Design may see Planning factor PLANNING

Form 1   Fluidized bed incinerator basic design parameter  

Name

Unit

Value

Remark

Incinerator Type/Model

-

-

-

Waste source & characteristic

-

-

-

Waste feeding speed

-

-

-

Waste composition analysis

-

-

-

Waste calorific analysis

-

-

-

Designed temperature

-

-

-

Operation temperature

-

-

-

1st air speed

-

-

-

2nd air speed

-

-

-

Excessive air ratio

-

-

-

Static bed height

-

-

-

Fluid medium / size / granule distributed

-

-

-

ambient air nature

-

-

-

Regulation & standard

-

-

-

Auxiliary fuel

-

-

-

Gas outlet temperature

-

-

-

heat recycle

-

-

-

Bed pressure drop

-

-

-

Distributor pressure drop

-

-

-

Decrement of burning

-

-

-

Bellows type

-

-

-

Bed heat-load

-

-

-

Feeding-type

-

-

-

Ash discharge-type

-

-

-

Form 2   Body  of the stove

Name Unit Value Remark
Conditions of feeding operation - - -
Bed inner diameter - - -
Bed height - - -
Transition zone Height - - -
Transition zone expanding angle - - -
Freeboard zone inner diameter - - -
Freeboard zone height - - -
Outer cover material - - -
Outer cover thick - - -
Bed firebricks - - -
Transition zone firebricks - - -
Freeboard zone firebricks - - -
Roof firebricks - - -
Surround( body) insulating refractory - - -
Surround( roof) insulating refractory - - -
Roof ceramic fibre - - -
Outer cover paint - - -
Bellows material - - -
Fire-resistant material of bellows - - -

Form 3   The air distributor board design parameter

Name Unit Value Remark
Board form - - -
fluidized bed inner diameter  - - -
1st air amount - - -
1si air temperature - - -
Board effective area - - -
Zozzle outer diameter - - -
Nozzle pitch - - -
Nozzle sum - - -
Nozzle array - - -
Hole Diameter - - -
Hole sum - - -
Hole air speed - - -
Concentric circles radius - - -
Hole pressure drop - - -
Hole ratio - - -
Hole width - - -
Hole height - - -
Mortars thickness - - -
Board pressure drop - - -
Bed granule diameter - - -
Bed material - - -
Static bed height - - -

 

3. Procedure

 

Probe into bubble-type fluidized bed incinerator as the target. Now we're talking about the bubble-type fluidized bed, C&C is willing to share the experiences (if you're interested in) with you about our business achievement of Kaohsiung International Airport FBI System.

Kaohsiung International Airport No.2 Refuse Incinerator P&ID shown as follows:

 

Kaohsiung International Airport FBI System including:

(1)  Feeding system  (2)  Ash screen system  (3) Fluidized bed incinerator stove body  

(4)  Quencher & Heat exchanger  (5) Bag Filter & Exhaust system   (6) Fuel system 

(7)  Desulphurization device  (8)  Instrument & electrol system

(1)  Feeding system

 

 This system includes a set of screw conveying device and a set of single axle  pump device. The screw conveying device including  the mud dumper, storage tank, the screw conveying device, and frequency converter panel to transport the higher content firm shape waste.

High liquid content  mud offal keep conveying trough Storage Tank, the agitator, the single axle pump, and control panel of frequency conversion. Barreled muds can be conveyed  into same incinerator feeding inlet  by means of  2 sets of  two-way electronic hoist engine of slide rail , picture shows  Feeding system sketch map.  

(2)  Ash screen system

(3) Fluidized bed incinerator stove body

(4)  Quencher & Heat exchanger

(5) Bag Filter & Exhaust system

(6)  Fuel system

(7)  Desulphurization device

 

(8)  Instrument & electrol system

 Detailed information may see IES


 

CONCLUSION

 

We may see Fluidized Bed Incineration system how to work in the front discussions; Sludge, the waste has been dumped into storage tank, and conveying into furnace by feeding conveyor. Blower it blowing the air into Heat Exchanger via bellows and air distributor to Sand bed, and the flowing air cause the sand violent mixing ,normally at this time, the operation temperature is 600-800℃; The organic compound of the waste, sludge, contaminator and auxiliary fuel proceed oxidization reaction under the high temperature circumstance. the rest of volatility compound and material which is not yet oxidized completely shall be reacted under 850 ℃ at freeboard zone. then discharge the gas smoke to Cyclone and separate larger granule, then smoke via heat exchanger and lower the temperature. After that, smoke via spraying tower cooling by spraying water to lower the temperature again, and de-acid de-dust, and finally exhausted by induced fan to chimney, to the air. 

 

Advantages:

 

(1)Gas state and solid state material is mixing completely by violent turbulence of flowing air. 

(2)Stove temperature is well mixed and even, avoid  hot spot been happening.

(3)Proceeding by lower temperature incinerating and low demand of excess air,  System gains low NOX discharging and reducing auxiliary fuel.

(4)Identity of high accumulation of heat, stove temperature won't be dropped sharply if high moisture contain material is entering into.

(5)Lower after treatment (passing through De-acid process, gain low nitrides, low oxides )   

(6)Low operation problem, low maintenance cost. (none removable kits in side stove)

(7)High efficiency combustion,  high heat exothermic rate per unit volume.

 

Shortcomings:

 

(1)There is limitation of feeding material, huge material must be crashed  first.

(2)Complicated Hi-tec Control system, not easy to operate.

(3) Not fit for waste treatment as low fusing point, high alkali metal contain material.  

(4)High dust in exhaust.

(5)Easy to be jammed by ash at discharging  system and feeding system.

 

 


 

TOP 

FBI Reference
Planning factor

 

向上 | CAT | FBI | FGT | MBI | MTI | RKI | RTO | WLI | WWT

Update: 18th Aug. 2006

Contact us       cceng.inc@msa.hinet.net

CC ENGINEERING, INC        12-1, No.179, Yong Ji Rd., Taipei, Taiwan, R.O.C.

 

 

T E L  :   886-2-8787-8763          F A X  :  886-2-8787-8651

www.cceng.com.tw