1

Duties of a burner for firing a rotary kiln

• high functionality and availability

• variable flame setting even in case of

a high portion of substitute fuel

• lowering the heat consumption

• reducing the primary air portion

• reducing the specific waste-gas quantity

In other words – we aim at cutting costoperating and maintenance cost

2

Seco

ndar

y ai

r

800

– 10

00°C

Jet -

air

ThePYRO-JET®- burner

Sw

irl

- ai

r

Rec

ircu

lati

on

3

Cooling air approx. 1 %

Jet – air approx. 1,6 %

Conveying air forpulverized coal approx. 2 %Swirl air approx. 2,4 %

Oil - burner

Ignition - burner

Secondary air approx. 93 %

The PYRO – JET® - burner cuts cost !( patented jet – air – nozzles )

1. No more than 7% primary air

required 2. p jet air 900 mbar3. p swirl air 160 mbar4. variable flame shape5. reduced fuel consumption6. reduced waste-gas quantity

4

X

Y

Z

Conventional PYRO JET burner

Jet - air - nozzle

Swirl air nozzle

Ring - nozzle for pulverized coal

Oil-gun nozzle

5

PYRO JET burner for petroleum coke and anthracite

X

Y

Z

Jet air nozzle

6

PYRO JET burner for coal, gas and oil

Jet air nozzle

Swirl air nozzle

Ring - nozzle for pulverized coal

Gas nozzle

Oil-gun nozzle

Gas ignition burner

7

1

2

3

4 8

6

5

7

1. jet air nozzles 2. pulverized coal /

animal meal 3. swirl air nozzle 4. plastics chips and paper 5. sawdust / wooden dust 6. Solvents 7. waste oil8. animal fat

PYRO JET burner designed as multi-channel burner for various substitute fuels

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PYRO JET burner – showing the different channels

Jet air approx. 1.6%

Cooling air approx. 1%

Conveying air forpulverized coal approx. 2%

Swirl air approx. 2.4%

Oil burner

No more than 7% primary air but up to 93% secondary air

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The PYRO JET burner not only fulfills your requirements –

it will go beyond your expectations!

• universal applicability of all fuels

• excellent flame shape adjustability thanks to intense mixing of fuel and hot secondary air

• primary air portion reduced down to 7%

• heat consumption lowered by approx. 10 kJ/kgclinker for each 1% primary air

• optimal combustion of fuel characterized by low content of volatiles

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PYRO JET burner for coal and fuel oil with a firing - capacity of 483 GJ/h

A PYRO – JET® - burner

B Jet – air

C Swirl – air

D pulverized coal

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KHD burners have been used as early as at the beginning of the sixties!

Since 1980 more than

500 PYRO JET burners have been practically applied in countries

all over the world !

7 PYRO JET burners have already been sold in the first 2 month of 2003

KHD burners – technical development, advance and success

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Capital outlay involved in a PYRO JET burner

Saving of primary air 4,50%

Heat saving per 1% 10,00 KJ/Kg

Total heat saving 45,00 KJ/Kg

Clinker production rate 3.000 t/d

Calorific value 21 MJ/Kg

Days of production 300 d/year

Fuel saving / year 1.929 t

Cost per ton 55 €

Total saving 106.071 €

Capital outlay 150.000 €

Pay-off period 1,41 Jahre