Veterinary Laboratories Agency: Difference between revisions

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==Plant Description<ref name="Ref1" />==

===Waste Reception & Storage===

Waste is collected around the site in bins. These are transported to the [[Incineration|incinerator]] where a bin lift loads the waste in to the [[Incineration|incinerator]] by rotating the bins 180 degrees, this ensures all the contents fall out of the bin in to the waste feed hopper. The waste is injected into the [[Incineration|furnace]] by a ram. Once inside the [[combustion]] chamber, rams move the waste through the [[grate]] at approximately ~~900oC~~ thus promoting continuous mixing of the waste with the [[combustion]] air introduced from beneath the [[grate]] into the heart of the fire. In the secondary chamber the gas temperature is maintained above ~~850oC~~ for 2 seconds. [[IBA|Ash]] from the grate is discharged into a bespoke skip.

Waste is collected around the site in bins. These are transported to the [[Incineration|incinerator]] where a bin lift loads the waste in to the [[Incineration|incinerator]] by rotating the bins 180 degrees, this ensures all the contents fall out of the bin in to the waste feed hopper. The waste is injected into the [[Incineration|furnace]] by a ram. Once inside the [[combustion]] chamber, rams move the waste through the [[grate]] at approximately 900°C thus promoting continuous mixing of the waste with the [[combustion]] air introduced from beneath the [[grate]] into the heart of the fire. In the secondary chamber the gas temperature is maintained above 850°C for 2 seconds. [[IBA|Ash]] from the grate is discharged into a bespoke skip.

The project to build two modern units to replace the end of life existing units has been delayed from 2022 to 2024 and permission is to be sought to continue to run beyond the implementation of the new [[BREF]]<ref>Annual Report 2021</ref>.

===Energy Recovery===

Hot gases from the [[combustion]] of waste pass through a waste heat steam boiler. The temperature of the gases are reduced from over ~~850oC~~ to around ~~160oC~~. The gases heat up the water in the boiler and produce steam at 4.5barG. This steam is fed to the site Energy Centre which distributes thermal energy around the site.

Hot gases from the [[combustion]] of waste pass through a waste heat steam boiler. The temperature of the gases are reduced from over 850°C to around 160°C. The gases heat up the water in the boiler and produce steam at 4.5barG. This steam is fed to the site Energy Centre which distributes thermal energy around the site.

===Gas Cleaning===

Downstream of the boiler [[wikipedia:Sodium bicarbonate|bicarbonate soda]] is injected to neutralise acid gases. [[wikipedia:Activated carbon|Activated carbon]] is injected to adsorb any remaining [[wikipedia:Dioxins and dioxin-like compounds|dioxins]], [[wikipedia:Furan|furans]] and [[wikipedia:Heavy metals|heavy metals]]. Prior to release into the atmosphere the gases pass through a fabric filter where the [[APC Residues|air pollution control (APC)]] residues are removed from the gas stream; these are disposed of at a [[Hazardous Landfill|hazardous waste landfill]]. Once the gases have been cleaned they are discharged into the atmosphere via a [[wikipedia:Chimney|stack]].

Downstream of the boiler [[wikipedia:Sodium bicarbonate|bicarbonate soda]] is injected to neutralise [[Flue Gas|acid gases]]. [[wikipedia:Activated carbon|Activated carbon]] is injected to adsorb any remaining [[wikipedia:Dioxins and dioxin-like compounds|dioxins]], [[wikipedia:Furan|furans]] and [[wikipedia:Heavy metals|heavy metals]]. Prior to release into the atmosphere the gases pass through a fabric filter where the [[APC Residues|air pollution control (APC)]] residues are removed from the gas stream; these are disposed of at a [[Hazardous Landfill|hazardous waste landfill]]. Once the gases have been cleaned they are discharged into the atmosphere via a [[wikipedia:Chimney|stack]].

==References==

@@ Line 10: / Line 10: @@
 ==Plant Description<ref name="Ref1" />==
 ===Waste Reception & Storage===
-Waste is collected around the site in bins. These are transported to the [[Incineration|incinerator]] where a bin lift loads the waste in to the [[Incineration|incinerator]] by rotating the bins 180 degrees, this ensures all the contents fall out of the bin in to the waste feed hopper. The waste is injected into the [[Incineration|furnace]] by a ram.  Once inside the [[combustion]] chamber, rams move the waste through the [[grate]] at approximately 900<sup>o</sup>C thus promoting continuous mixing of the waste with the [[combustion]] air introduced from beneath the [[grate]] into the heart of the fire.  In the secondary chamber the gas temperature is maintained above 850<sup>o</sup>C for 2 seconds.  [[IBA|Ash]] from the grate is discharged into a bespoke skip.
+Waste is collected around the site in bins. These are transported to the [[Incineration|incinerator]] where a bin lift loads the waste in to the [[Incineration|incinerator]] by rotating the bins 180 degrees, this ensures all the contents fall out of the bin in to the waste feed hopper. The waste is injected into the [[Incineration|furnace]] by a ram.  Once inside the [[combustion]] chamber, rams move the waste through the [[grate]] at approximately 900°C thus promoting continuous mixing of the waste with the [[combustion]] air introduced from beneath the [[grate]] into the heart of the fire.  In the secondary chamber the gas temperature is maintained above 850°C for 2 seconds. [[IBA|Ash]] from the grate is discharged into a bespoke skip.
+The project to build two modern units to replace the end of life existing units has been delayed from 2022 to 2024 and permission is to be sought to continue to run beyond the implementation of the new [[BREF]]<ref>Annual Report 2021</ref>.
 ===Energy Recovery===
-Hot gases from the [[combustion]] of waste pass through a waste heat steam boiler.  The temperature of the gases are reduced from over 850<sup>o</sup>C to around 160<sup>o</sup>C.  The gases heat up the water in the boiler and produce steam at 4.5barG.  This steam is fed to the site Energy Centre which distributes thermal energy around the site.
+Hot gases from the [[combustion]] of waste pass through a waste heat steam boiler.  The temperature of the gases are reduced from over 850°C to around 160°C.  The gases heat up the water in the boiler and produce steam at 4.5barG.  This steam is fed to the site Energy Centre which distributes thermal energy around the site.
 ===Gas Cleaning===
-Downstream of the boiler [[wikipedia:Sodium bicarbonate|bicarbonate soda]] is injected to neutralise acid gases.  [[wikipedia:Activated carbon|Activated carbon]] is injected to adsorb any remaining [[wikipedia:Dioxins and dioxin-like compounds|dioxins]], [[wikipedia:Furan|furans]] and [[wikipedia:Heavy metals|heavy metals]]. Prior to release into the atmosphere the gases pass through a fabric filter where the [[APC Residues|air pollution control (APC)]] residues are removed from the gas stream; these are disposed of at a [[Hazardous Landfill|hazardous waste landfill]]. Once the gases have been cleaned they are discharged into the atmosphere via a [[wikipedia:Chimney|stack]].
+Downstream of the boiler [[wikipedia:Sodium bicarbonate|bicarbonate soda]] is injected to neutralise [[Flue Gas|acid gases]].  [[wikipedia:Activated carbon|Activated carbon]] is injected to adsorb any remaining [[wikipedia:Dioxins and dioxin-like compounds|dioxins]], [[wikipedia:Furan|furans]] and [[wikipedia:Heavy metals|heavy metals]]. Prior to release into the atmosphere the gases pass through a fabric filter where the [[APC Residues|air pollution control (APC)]] residues are removed from the gas stream; these are disposed of at a [[Hazardous Landfill|hazardous waste landfill]]. Once the gases have been cleaned they are discharged into the atmosphere via a [[wikipedia:Chimney|stack]].
 ==References==