Is flue gas toxic?
Is flue gas toxic?
Oil, coal and natural gas will all produce slightly different flue gases – although the fundamental ingredients are largely the same. Some of these – nitrogen, oxygen, carbon dioxide and water vapour – are not directly harmful to humans, although the impact on the environment is certainly clear.
What is meant by flue gas desulphurisation?
Flue-gas desulfurization (FGD) is the removal process of sulfur dioxide (SO2) from flue gas emissions, often chemically. Sulfur dioxide in gases is produced by the combustion of fossil fuels and many industrial processes such as gasoline refining as well as cement, paper, glass, steel, iron and copper production.
What are the different pollution in the flue gas?
Flue gas—the emitted material produced when fossil fuels such as coal, oil, natural gas, or wood are burned for heat or power—may contain pollutants such as particulates, sulfur dioxide, mercury, and carbon dioxide. Most flue gas, however, consists of nitrogen oxides.
Why is flue gas desulfurization important?
Flue Gas Desulfurization (FGD) Processes. In many plants it is necessary to remove sulfur from the flue gases after the combustion process to meet environmental requirements.
What does flue gas smell like?
The gas itself is odourless, but when it escapes through an appliance like a boiler, then it can be detected by your nose. This will often come in the form of an unpleasant rotten eggs smell. You might also notice black stains around the area the boiler is situated in, which could be an indicator there is a leak.
Why is it called flue gas?
Flue gas is the gas exiting to the atmosphere via a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or steam generator.
Why is FGD required?
FGD is a system which reduces the SOx in flue gas through chemical treatment and converting the captured SOx into a by-product such as Gypsum or Calcium Sulphate or Sulphuric Acid depending upon the type of mechanism used. Dry scrubbing.
What is the disadvantage of wet limestone scrubbing?
Other drawbacks of wet-limestone scrubbing are large up-front capital costs, large equipment size and substantial predictive and corrective maintenance requirements. Substituting hydrated lime as the reagent reduces equipment size and costs, but increases reagent costs and material handling issues.
What does flue gas contain?
Flue gas (sometimes called exhaust gas or stack gas) is the gas that emanates from combustion plants and which contains the reaction products of fuel and combustion air and residual substances such as particulate matter (dust), sulfur oxides, nitrogen oxides, and carbon monoxide (Table 3.7).
How are flue gases treated?
Flue gas treatment technologies are post-combustion processes to convert NOx to molecular nitrogen or nitrates. The two primary strategies that have been developed for post-combustion control and are commercially available are selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR).
How safe is a boiler in a bedroom?
It will be safe as long as the room abides the mandatory procedures surrounding the boiler installation. The main safety regulation is to ensure the room is sealed. As long as the boiler takes air for combustion from the outside and emits its fumes outside via the flue, it’s safe to install in your bedroom.
Should you smell gas from a flue?
The smell of gas is actually added in as a safety feature because gas itself is odourless. So what they were smelling was the unburnt chemical that was coming from the flue. This is actually fairly normal.
What is flue gas desulphurisation? Removal of Sulfur Dioxide is called as Flue-gas Desulphurization (FGD). It seeks to remove gaseous pollutants viz. SO2 from exhaust flue gases generated in furnaces,boilers, and other industrial processes due to thermal processing, treatment, and combustion.
What are the advantages and disadvantages of wet flue gas desulfurization?
Advantages and disadvantages of wet flue gas desulfurization and denitration project: Wet flue gas desulfurization technology means that the absorbent is liquid or slurry. Because of the gas-liquid reaction, the reaction speed is fast, the efficiency is high, and the utilization rate of desulfurizer is high.
What are the disadvantages of desulfurization?
The main disadvantages of this method are secondary pollution of desulfurization wastewater, easy scaling and corrosion of the system, high initial investment cost of desulfurization equipment and high operation cost. If you want to know more about it, please continue to pay attention to our website.
What is flue-gas desulfurization material?
Flue-gas desulfurization (FGD) material is a product of a process typically used for reducing SO 2 emissions from the exhaust gas system of a coal-fired boiler. The physical nature of these materials varies from a wet sludge to a dry, powdered material depending on the process.
