Knostrop Clinical Waste Incinerator: Difference between revisions

From Wikiwaste
← Older edit
VisualWikitext
Northern Chick (talk | contribs)
authour, banneredit
1,760 edits
mNo edit summary
Bin52 (talk | contribs)
authour, banneredit
3,726 edits
m minor text change
 
(7 intermediate revisions by 2 users not shown)
Line 6: Line 6:


==Summary==
==Summary==
[[Clinical Waste Incinerator]] operated by [[SRCL]] and located adjacent to Knostrop Treatment Works, Leeds, with an annual throughput limit of 17,000 tonnes.
[[Clinical Waste Incinerator]] operated by [[SRCL]] and located adjacent to Knostrop Treatment Works, Leeds, of a twin-line [[Grate|stepped hearth design]], with an annual throughput limit of 17,000 tonnes.
 
==Plant<ref name="Adden">Annual Performance Report 2020</ref>==
==Plant<ref name="Adden">Annual Performance Report 2020</ref>==
The Leeds incinerator consists of two streams, known as the East and West streams, each with a nominal throughput of one tonne of clinical waste per hour. The permit sets an annual throughput limit of 8500 tonnes on each stream, with lower limits on specific waste types. The two streams are independent of each other, so that one stream can still be operated while the other stream is shut down for maintenance.
The Leeds incinerator consists of two streams, known as the East and West streams, each with a nominal throughput of one tonne of [[Clinical Waste|clinical waste]] per hour. The [[Environmental Permit|permit]] sets an annual throughput limit of 8,500 tonnes on each stream, with lower limits on specific [[Waste|waste]] types. The two streams are independent of each other, so that one stream can still be operated while the other stream is shut down for maintenance.


The two incinerators are of stepped hearth design, with three main combustion hearths and an ash box. Clinical waste is loaded mechanically direct from the wheeled bins used to deliver the waste, onto the first hearth, and the combustion process commences. Hydraulic rams operate at intervals to push the waste along the first hearth, until it falls off the end onto the second hearth where the waste burns vigorously at a temperature of between 1000 and 1100 degrees Centigrade. The waste is then pushed from the second hearth onto the third hearth, where it burns out to produce an ash. This bottom ash is then pushed into an ash box, where the fixed carbon in the ash is further burned out. The retention time on the hearths is approximately 12 hours, with the bottom ash being retained in the ash box for up to 8 hours before being dropped into a skip. Ram movements are programmed in relation to the number of bins fed.
The two [[Incineration|incinerators]] are of [[Grate|stepped hearth design]], with three main [[combustion]] [[Grate|hearths]] and an ash box. [[Clinical Waste]] is loaded mechanically direct from the wheeled bins used to deliver the [[Clinical Waste|waste]], onto the first [[Grate|hearth]], and the [[Combustion|combustion]] process commences. Hydraulic rams operate at intervals to push the [[Clinical Waste|waste]] along the first [[Grate|hearth]], until it falls off the end onto the second [[Grate|hearth]] where the [[Clinical Waste|waste]] burns vigorously at a temperature of between 1000 and 1100 degrees Centigrade. The [[Clinical Waste|waste]] is then pushed from the second [[Grate|hearth]] onto the third [[Grate|hearth]], where it burns out to produce an [[Incinerator Bottom Ash|ash]]. This [[Incinerator Bottom Ash|bottom ash]] is then pushed into an ash box, where the fixed carbon in the ash is further burned out. The retention time on the hearths is approximately 12 hours, with the [[Incinerator Bottom Ash|bottom ash]] being retained in the ash box for up to 8 hours before being dropped into a skip. Ram movements are programmed in relation to the number of bins fed.


The flue gases from the [[Incineration]] process then pass through a secondary chamber, or afterburner, where any gaseous products of [[Combustion]] are burned out under oxygen rich conditions. This stage is designed to destroy any Carbon Monoxide, Volatile Organic Compounds, and dioxins and furans produced by the [[Combustion]] process.
The flue gases from the [[Incineration]] process then pass through a secondary chamber, or afterburner, where any gaseous products of [[Combustion]] are burned out under oxygen rich conditions. This stage is designed to destroy any [[Wikipedia:Carbon monoxide|Carbon Monoxide]], [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], and [[Wikipedia:Dioxins and dioxin-like compounds|dioxins]] and [[Wikipedia:Furan|furans]] produced by the [[Combustion]] process.


The flue gases are then cooled by passing through a waste-heat boiler and economiser, before passing into the final, abatement section of the process. Powdered lime (Calcium Hydroxide) and powdered activated carbon are added to the flue gases entering the abatement process to remove acid gases, heavy metals and residual dioxins and furans before discharge to atmosphere from the stack. The flue gases being discharged from the stack are continuously monitored for Hydrogen Chloride, Sulphur Dioxide, Carbon Monoxide, Oxides of Nitrogen, particulate matter (dust), Volatile Organic Compounds, oxygen and moisture content.
The [[Flue Gas|flue gases]] are then cooled by passing through a waste-heat boiler and [[wikipedia:Economizer| economiser]], before passing into the final, abatement section of the process. Powdered [[Wikipedia:Lime (material)|lime]] (Calcium Hydroxide) and powdered [[wikipedia:Activated carbon|activated carbon]] are added to the [[Flue Gas|flue gases]] entering the abatement process to remove acid gases, heavy metals and residual [[Wikipedia:Dioxins and dioxin-like compounds|dioxins]] and [[Wikipedia:Furan|furans]] before discharge to atmosphere from the stack. The flue gases being discharged from the [[wikipedia:Chimney|stack]] are continuously monitored for [[wikipedia:Hydrogen chloride|Hydrogen Chloride]], [[wikipedia:Sulfur dioxide|Sulphur Dioxide]], [[Wikipedia:Carbon monoxide|Carbon Monoxide]], [[Wikipedia:Nitrogen oxide|Oxides of Nitrogen]], particulate matter (dust), [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], [[Wikipedia:Oxygen|oxygen]] and [[Moisture Content|moisture content]].


The incineration process produces two residues; bottom ash and spent lime. The bottom ash is sent to a recycling transfer station for reprocessing, the bulk of the material ultimately ending up as a landfill cover material. The spent lime, which is the residue from the flue gas abatement process, went to a site in Leeds where it is used to neutralise acidic wastes.
The [[Incineration|incineration]] process produces two residues; [[Incinerator Bottom Ash|bottom ash]] and [[Fly Ash|spent lime]]. The [[Incinerator Bottom Ash|bottom ash]] is sent to a recycling transfer station for reprocessing, the bulk of the material ultimately ending up as a [[Landfill|landfill]] cover material. The [[Fly Ash|spent lime]], which is the residue from the [[Flue Gas|flue gas]] abatement process, went to a site in Leeds where it is used to neutralise acidic wastes.
{{EAIn|EPR={{#var:epr}}}}
{{EAIn|EPR={{#var:epr}}}}


==References==
==References==

Latest revision as of 07:46, 25 June 2021

Clinical Waste Incinerator operated by SRCL and located adjacent to Knostrop Treatment Works, Leeds, with an annual throughput limit of 17,000 tonnes.


Knostrop Clinical Waste Incinerator
Site Location
Site Location

See HT & Clin → page for a larger UK Wide map.

Waste Licence CP3930XL
Operator SRCL
Operational Capacity 17,000tpa
Number of Lines 2
Region Yorkshire and Humber

Annual Report Data

Year Total In Total Clinical IBA Out ACP Out Op Hours

2019 13200 12940 2584 913 13760
2018 13937 13937 3137
2017 14111
2020 12754 12539 2358 807 15660
2021 10625 10280 2460 705 12246
2022 13198 13017 1921 799 14643


Knostrop Clinical Incinerator, SRCL, Captured from Google Earth June 21, all rights reserved
Knostrop Clinical Incinerator, SRCL, Captured from Google Earth June 21, all rights reserved


Summary

Clinical Waste Incinerator operated by SRCL and located adjacent to Knostrop Treatment Works, Leeds, of a twin-line stepped hearth design, with an annual throughput limit of 17,000 tonnes.

Plant[1]

The Leeds incinerator consists of two streams, known as the East and West streams, each with a nominal throughput of one tonne of clinical waste per hour. The permit sets an annual throughput limit of 8,500 tonnes on each stream, with lower limits on specific waste types. The two streams are independent of each other, so that one stream can still be operated while the other stream is shut down for maintenance.

The two incinerators are of stepped hearth design, with three main combustion hearths and an ash box. Clinical Waste is loaded mechanically direct from the wheeled bins used to deliver the waste, onto the first hearth, and the combustion process commences. Hydraulic rams operate at intervals to push the waste along the first hearth, until it falls off the end onto the second hearth where the waste burns vigorously at a temperature of between 1000 and 1100 degrees Centigrade. The waste is then pushed from the second hearth onto the third hearth, where it burns out to produce an ash. This bottom ash is then pushed into an ash box, where the fixed carbon in the ash is further burned out. The retention time on the hearths is approximately 12 hours, with the bottom ash being retained in the ash box for up to 8 hours before being dropped into a skip. Ram movements are programmed in relation to the number of bins fed.

The flue gases from the Incineration process then pass through a secondary chamber, or afterburner, where any gaseous products of Combustion are burned out under oxygen rich conditions. This stage is designed to destroy any Carbon Monoxide, Volatile Organic Compounds, and dioxins and furans produced by the Combustion process.

The flue gases are then cooled by passing through a waste-heat boiler and economiser, before passing into the final, abatement section of the process. Powdered lime (Calcium Hydroxide) and powdered activated carbon are added to the flue gases entering the abatement process to remove acid gases, heavy metals and residual dioxins and furans before discharge to atmosphere from the stack. The flue gases being discharged from the stack are continuously monitored for Hydrogen Chloride, Sulphur Dioxide, Carbon Monoxide, Oxides of Nitrogen, particulate matter (dust), Volatile Organic Compounds, oxygen and moisture content.

The incineration process produces two residues; bottom ash and spent lime. The bottom ash is sent to a recycling transfer station for reprocessing, the bulk of the material ultimately ending up as a landfill cover material. The spent lime, which is the residue from the flue gas abatement process, went to a site in Leeds where it is used to neutralise acidic wastes.

Waste Tonnage, By Origin

The table shows a list of the Waste for the Permit CP3930XL, that has arrived into sites as reported to the Regulator and then publicised in their reported statistics. The Data was last updated on Oct-24. The total reported tonnage arriving at the site was: 5,741.9t.

Where this tonnage exceeds that reported in year of the corresponding annual report, this may be due to the following reasons:

  • Tonnage may have been received but not incinerated, i.e. the material is held pending incineration (the operator return to the EA reports as received whereas the annual report focuses on when the waste is incinerated.)
  • Material may have been received into the site but treated in some other way than incineration.
  • Material may have been received on the but transferred out of site for disposal/treatment at another site rather than incineration on the site.
EWC Code Origin of Waste Tonnes In
02 02 02 York 0.17
02 02 03 Rushcliffe 4.82
09 01 01* Yorks & Humber 0.02
15 01 10* Stockton-on-Tees 3.06
15 01 10* Yorks & Humber 2.58
16 05 06* North East Lincolnshire 0.19
16 05 06* Yorks & Humber 37.06
18 01 01 York 0.01
18 01 01 Yorks & Humber 0.13
18 01 02 Yorks & Humber 1.09
18 01 03* Antrim and Newtownabbey 92.12
18 01 03* Ashfield 10.44
18 01 03* Bassetlaw 0.03
18 01 03* Bedford 0.07
18 01 03* Belfast 1.63
18 01 03* Bolsover 1.08
18 01 03* Boston 77.26
18 01 03* Bradford 40.54
18 01 03* Bridgend 10.63
18 01 03* Bristol, City of 0.06
18 01 03* Cannock Chase 0
18 01 03* Cardiff 0.08
18 01 03* Carmarthenshire 0.28
18 01 03* Charnwood 0.19
18 01 03* Cheltenham 0.71
18 01 03* Cherwell 0.49
18 01 03* Cheshire East 19.03
18 01 03* Cheshire West and Chester 0.34
18 01 03* City of Edinburgh 0.13
18 01 03* County Durham 0
18 01 03* Cumberland 0.35
18 01 03* Denbighshire 0.01
18 01 03* Derby 4.59
18 01 03* Derry City and Strabane 0.51
18 01 03* Doncaster 1.19
18 01 03* East Lindsey 0.06
18 01 03* East Midlands 25.32
18 01 03* East Riding of Yorkshire 71.09
18 01 03* East Staffordshire 0.66
18 01 03* East Suffolk 0.03
18 01 03* East of England 0.16
18 01 03* Eastleigh 0.05
18 01 03* Fareham 1.8
18 01 03* Fermanagh and Omagh 0.08
18 01 03* Gateshead 0.03
18 01 03* Great Yarmouth 0.07
18 01 03* Gwynedd 0.07
18 01 03* Hartlepool 1.84
18 01 03* Hinckley and Bosworth 0.02
18 01 03* Kingston upon Hull, City of 0.17
18 01 03* Kirklees 19.03
18 01 03* Leeds 350.82
18 01 03* Lisburn and Castlereagh 0.52
18 01 03* Mansfield 0.23
18 01 03* Newark and Sherwood 90.97
18 01 03* Newcastle upon Tyne 3.85
18 01 03* Newry, Mourne and Down 0.23
18 01 03* North Devon 0.57
18 01 03* North East 7.51
18 01 03* North East Lincolnshire 54.28
18 01 03* North Kesteven 3.65
18 01 03* North Lincolnshire 28.27
18 01 03* North Northamptonshire 0.76
18 01 03* North Somerset 0.27
18 01 03* North Tyneside 0.95
18 01 03* North West 97.18
18 01 03* North West Leicestershire 0
18 01 03* North Yorkshire 109.28
18 01 03* Northern Ireland 0.23
18 01 03* Northumberland 12.29
18 01 03* Nuneaton and Bedworth 2.33
18 01 03* Pendle 0.03
18 01 03* Redcar and Cleveland 9.37
18 01 03* Rhondda Cynon Taf 0.41
18 01 03* Rochdale 1.31
18 01 03* Rushcliffe 2.51
18 01 03* Scotland 1.33
18 01 03* Shropshire 0.48
18 01 03* Somerset 8.26
18 01 03* South Cambridgeshire 0.13
18 01 03* South East 23.37
18 01 03* South Gloucestershire 0.04
18 01 03* South Holland 0.1
18 01 03* South Staffordshire 0.01
18 01 03* South Tyneside 0.07
18 01 03* South West 2.24
18 01 03* Southampton 0.65
18 01 03* Stafford 0.09
18 01 03* Stockton-on-Tees 109.11
18 01 03* Sunderland 3.43
18 01 03* Swindon 0.02
18 01 03* Torfaen 0.06
18 01 03* Vale of Glamorgan 0.06
18 01 03* Wakefield 10.11
18 01 03* Wales 0.12
18 01 03* Warwick 1.37
18 01 03* West Devon 0.41
18 01 03* West Lindsey 0.06
18 01 03* West Lothian 0.95
18 01 03* West Midlands 21.9
18 01 03* Wirral 2.38
18 01 03* Worthing 0.96
18 01 03* Wrexham 0.02
18 01 03* York 55.96
18 01 03* Yorks & Humber 1994.17
18 01 04 Ashfield 0.09
18 01 04 Boston 46.72
18 01 04 Bradford 11.83
18 01 04 Doncaster 4.07
18 01 04 East Midlands 0.6
18 01 04 East Riding of Yorkshire 14.06
18 01 04 East Staffordshire 0.1
18 01 04 Kirklees 8.59
18 01 04 Leeds 18.75
18 01 04 North East Lincolnshire 3.86
18 01 04 North Lincolnshire 1.16
18 01 04 North West 8.37
18 01 04 North Yorkshire 14.07
18 01 04 Redcar and Cleveland 10.47
18 01 04 Rushcliffe 0.79
18 01 04 Scotland 0.38
18 01 04 Shropshire 0.06
18 01 04 Stockton-on-Tees 16.22
18 01 04 Wakefield 5.14
18 01 04 West Lindsey 0.01
18 01 04 West Midlands 0.18
18 01 04 Worthing 2.16
18 01 04 York 12.83
18 01 04 Yorks & Humber 747.34
18 01 06* Ashfield 0.04
18 01 06* Bradford 0
18 01 06* Derby 0.99
18 01 06* Leeds 0.38
18 01 06* North Tyneside 0.07
18 01 06* North Yorkshire 0.01
18 01 06* Pendle 0.37
18 01 06* West Midlands 0.09
18 01 06* York 0.02
18 01 06* Yorks & Humber 5.54
18 01 07 Newark and Sherwood 0.01
18 01 08* Antrim and Newtownabbey 369.64
18 01 08* Ashfield 0.7
18 01 08* Belfast 0.77
18 01 08* Boston 0.99
18 01 08* Bradford 0.07
18 01 08* Cheltenham 0.06
18 01 08* Cheshire East 2.17
18 01 08* Cheshire West and Chester 0.05
18 01 08* Derby 0.17
18 01 08* Derry City and Strabane 2.01
18 01 08* Doncaster 0.01
18 01 08* East Midlands 2
18 01 08* East Riding of Yorkshire 0.13
18 01 08* East Staffordshire 0.25
18 01 08* Hartlepool 0
18 01 08* Kirklees 1.36
18 01 08* Leeds 2.09
18 01 08* Lisburn and Castlereagh 0.29
18 01 08* Newark and Sherwood 1.24
18 01 08* Newcastle upon Tyne 0.89
18 01 08* Newry, Mourne and Down 0.07
18 01 08* North East 0.3
18 01 08* North East Lincolnshire 0.11
18 01 08* North Lincolnshire 0.22
18 01 08* North Northamptonshire 0.15
18 01 08* North West 1.9
18 01 08* North West Leicestershire 0.12
18 01 08* North Yorkshire 0.55
18 01 08* Northern Ireland 0.58
18 01 08* Nuneaton and Bedworth 0.19
18 01 08* Rochdale 0.02
18 01 08* Sandwell 1.91
18 01 08* Scotland 0.04
18 01 08* Stockton-on-Tees 2.76
18 01 08* Stratford-on-Avon 0.11
18 01 08* Sunderland 0.03
18 01 08* Wakefield 0.08
18 01 08* Wales 0.03
18 01 08* Warwick 0.15
18 01 08* West Devon 0.02
18 01 08* West Lothian 0.22
18 01 08* West Midlands 2.11
18 01 08* Wirral 0.06
18 01 08* York 0.37
18 01 08* Yorks & Humber 89.83
18 01 09 Antrim and Newtownabbey 6.14
18 01 09 Ashfield 10.74
18 01 09 Boston 12.45
18 01 09 Bradford 1.38
18 01 09 Ceredigion 0.07
18 01 09 Cheltenham 0.07
18 01 09 Cheshire East 0.08
18 01 09 Cheshire West and Chester 0.22
18 01 09 Denbighshire 0.01
18 01 09 Derby 0.65
18 01 09 Derry City and Strabane 0.08
18 01 09 Doncaster 3.07
18 01 09 East Midlands 0.97
18 01 09 East Riding of Yorkshire 2.67
18 01 09 East Staffordshire 0.09
18 01 09 Kirklees 11.59
18 01 09 Leeds 48.29
18 01 09 Newark and Sherwood 102.31
18 01 09 Newcastle upon Tyne 1.61
18 01 09 North East 13.49
18 01 09 North East Lincolnshire 0.81
18 01 09 North Lincolnshire 0.72
18 01 09 North West 0.59
18 01 09 North Yorkshire 12.77
18 01 09 Northern Ireland 0.1
18 01 09 Northumberland 0.45
18 01 09 Nuneaton and Bedworth 0.11
18 01 09 Rhondda Cynon Taf 0.74
18 01 09 Rochdale 0.72
18 01 09 Rushcliffe 0.03
18 01 09 Scotland 0.65
18 01 09 Shropshire 0.07
18 01 09 South West 7.79
18 01 09 Stockton-on-Tees 6.86
18 01 09 Stratford-on-Avon 0.03
18 01 09 Wakefield 0.39
18 01 09 West Lindsey 0.04
18 01 09 West Lothian 0.31
18 01 09 West Midlands 2.9
18 01 09 Wirral 0.13
18 01 09 York 12.05
18 01 09 Yorks & Humber 301.48
18 01 10* Doncaster 0
18 01 10* Kirklees 0.08
18 01 10* Leeds 0.03
18 01 10* North East Lincolnshire 0.05
18 01 10* North Yorkshire 0.09
18 01 10* York 0.05
18 01 10* Yorks & Humber 0.46
18 02 02* Bradford 1.98
18 02 02* Cheshire West and Chester 0.24
18 02 02* East Midlands 0.29
18 02 02* East Riding of Yorkshire 6.1
18 02 02* East of England 0.08
18 02 02* Kirklees 1.08
18 02 02* Leeds 8.2
18 02 02* Melton 0.3
18 02 02* Mid Suffolk 0.07
18 02 02* Midlothian 0.21
18 02 02* North Ayrshire 0.34
18 02 02* North East 4.67
18 02 02* North East Lincolnshire 1.23
18 02 02* North Lincolnshire 17.05
18 02 02* North West Leicestershire 0.79
18 02 02* Scotland 0.34
18 02 02* West Midlands 2.26
18 02 02* York 0.12
18 02 02* Yorks & Humber 38.79
18 02 03 Bradford 1.67
18 02 03 East Riding of Yorkshire 1.87
18 02 03 King's Lynn and West Norfolk 0.11
18 02 03 Kirklees 0.05
18 02 03 Leeds 2.56
18 02 03 North East 1.73
18 02 03 North East Lincolnshire 0.17
18 02 03 North Lincolnshire 18.64
18 02 03 North Tyneside 0.02
18 02 03 North Yorkshire 0.69
18 02 03 Stockton-on-Tees 0.29
18 02 03 Stratford-on-Avon 0.15
18 02 03 Wakefield 0.06
18 02 03 West Midlands 0.27
18 02 03 Yorks & Humber 8.25
18 02 07* Antrim and Newtownabbey 0.48
18 02 07* Yorks & Humber 0.01
18 02 08 Antrim and Newtownabbey 2.21
18 02 08 East Riding of Yorkshire 0.72
18 02 08 Kirklees 0.03
18 02 08 Leeds 0.03
18 02 08 North Ayrshire 0.38
18 02 08 North East 1.28
18 02 08 North Lincolnshire 3.74
18 02 08 North Yorkshire 0.02
18 02 08 West Lothian 0.13
18 02 08 Yorks & Humber 33
20 01 32 Yorks & Humber 0.01
20 01 99 Bradford 0.44
20 01 99 Doncaster 0.09
20 01 99 East Riding of Yorkshire 0.52
20 01 99 Greenwich 3
20 01 99 Kirklees 0.3
20 01 99 Leeds 19.7
20 01 99 North East Lincolnshire 1.33
20 01 99 North Lincolnshire 1.11
20 01 99 North Yorkshire 0.72
20 01 99 South Cambridgeshire 0.12
20 01 99 Stockton-on-Tees 0.01
20 01 99 Wakefield 1
20 01 99 York 0.22
20 01 99 Yorks & Humber 114.91


References

  1. ↑ Annual Performance Report 2020
Retrieved from ‘https://wikiwaste.org.uk/index.php?title=Knostrop_Clinical_Waste_Incinerator&oldid=18596’