Energy from Waste with Combined Heat and Power Facility, Oxwellmains

RPS Planning & Development – Brighton Office JAS4061 O:\B_Jobs\4061s\Schedule 4\050310\4061_Sch4_Response_190310.doc March 2010 Rev0

Figures

Energy from Waste with Combined Heat and Power Facility, Oxwellmains

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Energy from Waste with Combined Heat and Power Facility, Oxwellmains

RPS Planning & Development – Brighton Office JAS4061 O:\B_Jobs\4061s\Schedule 4\050310\4061_Sch4_Response_190310.doc March 2010 Rev0

Figure 1

Runcorn EfW facility – Waste Reception Hall & Bunker Cross

Section

Energy from Waste with Combined Heat and Power Facility, Oxwellmains

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Energy from Waste with Combined Heat and Power Facility, Oxwellmains

RPS Planning & Development – Brighton Office JAS4061 O:\B_Jobs\4061s\Schedule 4\050310\4061_Sch4_Response_190310.doc March 2010 Rev0

Figure 2

Runcorn EfW facility – Waste Reception Hall & Bunker Plan

Energy from Waste with Combined Heat and Power Facility, Oxwellmains

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Energy from Waste with Combined Heat and Power Facility, Oxwellmains

RPS Planning & Development – Brighton Office JAS4061 O:\B_Jobs\4061s\Schedule 4\050310\4061_Sch4_Response_190310.doc March 2010 Rev0

Figure 3

Revised Water Balance

Energy from Waste with Combined Heat and Power Facility, Oxwellmains

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FIGURE:3i (Figure 8 in original PPC application)

Viridor Waste Management Limited – Energy from Waste with Combined Heat and Power Facility, Oxwellmains.

EXPECTED WATER BALANCETITLE:

Boiler watertreatment plant

Storage vessel Feed water tank

BoilerIncinerator

Process waterstorage tank

Bottom ashdischarger

Bag filter

Oil separator

Wash water storagetank / contaminated

water pit

Boiler blow downvessel

Overflow totemporary tanker

Stack

Foul wastetreatment

8,876 m3/yr

Raw (Mains) Water

RainwaterStorage Tank

Zero flow under normal conditions,flow only expected in the event ofabnormal operations e.g. boilercleaning

Water In

Water Out

5,542 m3/yr

924 m3/yr

200 m3/yr 4,618 m3/yrEvaporation

27,600 m3/yr

Surface water

Roof water

Perimeter drains

200 m3/yr

Wash water from “clean”areas

5,616 m3/yr

Will be addedwhenrainwater lessthan 11,007m3/yr

7,550 m3/yr toatmosphere inexhaust gases

1,124 m3/yr

Domestic UseWash water from “dirty"areas

27,630 m3/yr

Based on 2 lines

FIGURE: 3ii

Viridor Waste Management Limited – Energy from Waste with Combined Heat and Power Facility, Oxwellmains

EXPECTED WATER BALANCETITLE:

Notes

1. Raw water from public supply is used both as domestic water and process water.

2. Wash water from cleaning of "clean" process rooms (such as the turbine building) is taken from the raw water supply andsubsequently discharged to the process water tank.

3. Rain water from paved areas, roofs and building perimeter drains is fed through a treatment of swales, porous paviours and stonefilled trenches prior to the rainwater tank or to the detention basin on site. The rainwater tank will top up the process water tank.

4. The process water storage tank also receives water from boiler blow down.

5. The process water is used for quenching the hot bottom ash, whilst most water will remain as moisture within the bottom ashsome evaporative loss will occur. Any water draining from the bottom ash will be recycled for re-use in the quench water system.

6. Wash water from “dirtier“ process areas such as the flue gas cleaning building and the bottom ash bunker is stored in the washwater storage tank. The wash water is used in the bottom ash discharger.

7. Waste water from the boiler water treatment plant is led to the process storage tank.

8. Water Balance is based on a dry system.

Energy from Waste with Combined Heat and Power Facility, Oxwellmains

RPS Planning & Development – Brighton Office JAS4061 O:\B_Jobs\4061s\Schedule 4\050310\4061_Sch4_Response_190310.doc March 2010 Rev0

Figure 4

Dunbar EfW Facility – Plant Cross Section

Energy from Waste with Combined Heat and Power Facility, Oxwellmains

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Energy from Waste with Combined Heat and Power Facility, Oxwellmains

RPS Planning & Development – Brighton Office JAS4061 O:\B_Jobs\4061s\Schedule 4\050310\4061_Sch4_Response_190310.doc March 2010 Rev0

Appendix A

Keppel Seghers Plant Details

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Features• Straightforward construction• Electromechanical drive• No contact with waste• fail-safe closing system

Advantages• Reduced investment• Limited power consumption• Less wear and maintenance• Safety

Feeding hopper and shut-off flap

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Features

• Water-cooled chute, active cooling• ‘Cold’ compensator• Constructed in wear resistant material• Robust construction

Advantages• Safety• Airtight, reliable• Reduced maintenance costs• Long life time

Feeding chute and compensator

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

SEGHERSmulti-stage grate

Features

• Modular construction• Multi-stage• Independent double motion control• Special tile construction

Advantages• Shortest erection time• Best control leads to high throughputs• Controlled combustion, good burn-out• Long life time, reduced maint. costs

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Furnace

Features

• Independent movements per element• Independent air injection per element• Full access to all controls and

instruments

Advantages• Stabilised steam flow, higher energy

production• Ease of maintenance and operation

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Features

• CFD modelling• DeNOx optimisation• Secondary air injection optimisation• Gas flow pattern optimisation

Advantages• 850°C/2s (dioxin destruction)• Better energy recovery• Reduced reactive consumption• Better gas burnout

Post-combustion

Secondary

air

Secondary

air

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Ash extractor

Features

• Equal torque distribution• Less friction• Robust

Advantages• Less power consumption• Less wear• Reliable

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

DeNOx SNCR

Features

• Non-catalytic• Controlled injection at several levels• High temperature NOx reduction

Advantages• Reduced investment cost• Min. reaction product consumption• Reduced energy consumption

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Features

• Multiple primary air fans• Secondary air injection at several levels• Frequency controlled fans

Advantages• Optimised combustion air control• Max. energy production• Minimum electricity consumption• High availability

Combustion air

Burner

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

Steam boiler

Features

• Horizontal boiler• T before final superheater < 650°C• Steam conditions 400°C/40 bara• Controlled specifications

Advantages• High availability• Min. maintenance costs• Min. corrosion problems• High quality

turbine

air condenser

lime milk

active carbonbag house

ID fan chimney

semi-wet reactor

electric power

steamboiler

deNOx

waste

residues

boiler ash

bottom ashgrate siftings

furnace

INDAVER: 18,000 hrs INDAVER: 18,000 hrs

without manual without manual

cleaningcleaning

Boiler cleaning

Features

• Rapping system• Externally mounted on cart• Pneumatic hammers

Advantages• Efficient cleaning• Reduced dioxin production• Increased steam production• Reduced maintenance costs

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