Hillingdon Clinical Waste Incinerator: Difference between revisions

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The [[Flue Gas|flue gases]] from the [[Incineration|incineration]] process then pass through a secondary chamber, or afterburner, where any gaseous products of [[Combustion|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 dioxin-like compounds]] and [[Wikipedia:Furan|furans]] produced by the [[Combustion|combustion]] process in the primary chamber.

The [[Flue Gas|flue gases]] are then cooled by directing them through a waste-heat boiler and economiser, before they pass 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, [[Wikipedia:Heavy metals|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]], [[Wikipedia:Particulates|particulate matter]] (dust), [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], [[Wikipedia:Oxygen|oxygen]], [[Wikipedia:Ammonia|ammonia]] and [[Wikipedia:Nitrous oxide|nitrous oxide]].

The [[Incineration|incineration]] process produces two residues; [[Incinerator Bottom Ash|bottom ash]] and [[Fly Ash|spent lime]].

The ~~hot gases then pass through a~~ [[~~wikipedia:Boiler (power generation)~~|~~boiler~~]] ~~and dilution air system, before the~~ [[~~Flue Gas~~|~~gases~~]] ~~pass on to the~~ [[~~wikipedia:Scrubber~~|~~flue gas treatment~~]] ~~system<ref name="SRCL" />~~.

The 2020 annual report states that the ''[[Incineration|incinerator]] is currently off-line with the site being operated as a transfer facility agreed LEP'' and at the end of the same annual report it notes ''Plant off-line for major refurbishment. Scope of works controlled by the NHS''<ref>Annual Performance Report 2020</ref>

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 The [[Flue Gas|flue gases]] from the [[Incineration|incineration]] process then pass through a secondary chamber, or afterburner, where any gaseous products of [[Combustion|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 dioxin-like compounds]] and [[Wikipedia:Furan|furans]] produced by the [[Combustion|combustion]] process in the primary chamber.
+The [[Flue Gas|flue gases]] are then cooled by directing them through a waste-heat boiler and economiser, before they pass 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, [[Wikipedia:Heavy metals|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]], [[Wikipedia:Particulates|particulate matter]] (dust), [[Wikipedia:Volatile organic compound|Volatile Organic Compounds]], [[Wikipedia:Oxygen|oxygen]], [[Wikipedia:Ammonia|ammonia]] and [[Wikipedia:Nitrous oxide|nitrous oxide]].
+The [[Incineration|incineration]] process produces two residues; [[Incinerator Bottom Ash|bottom ash]] and [[Fly Ash|spent lime]].
-The hot gases then pass through a [[wikipedia:Boiler (power generation)|boiler]] and dilution air system, before the [[Flue Gas|gases]] pass on to the [[wikipedia:Scrubber|flue gas treatment]] system<ref name="SRCL" />.
 The 2020 annual report states that the ''[[Incineration|incinerator]] is currently off-line with the site being operated as a transfer facility agreed LEP'' and at the end of the same annual report it notes ''Plant off-line for major refurbishment. Scope of works controlled by the NHS''<ref>Annual Performance Report 2020</ref>