In accordance with "Standard for pollution control on the municipal solid waste incineration" (draft), all existing and new the municipal solid waste incinerators need automatic continuous on-line monitoring of main ingredients in incineration flue gas. Monitoring projects should include at least HCl, SO2, NOx, soot, etc., but also need to detect CO and HF in some higher environmental requirements situations. Currently on-line monitoring of HCl and HF in waste incineration occasion has the following solutions:
In calcination processes, solid intermediates and products are regularly handled in the fine powder form (ex: kaolin or metakaulin). There is a need to separate these very fine powders from the exhaust streams of calciners, fluid bed dryers or incinerators, often at critical temperature conditions. For PM emission control at very high temperature ( >600 ºC), traditional bag filters following temperature exchangers or scrubbers are used as end stage dedusters.
For PM emission control in very high temperature exhaust streams ( >600ºC ), such as gasification, pyrolysis and incineration, traditional bag filters following temperature exchangers, ceramic filters, or scrubbers are used as end stage dedusters. For most arrangements, a primary high temperature separator, namely a cyclone, is important to reduce as much ash and char as possible. A good efficiency is important to reduce concentration of solids to the final stage dedusters, avoiding plugging of scrubbers...
Polycyclic Aromatic Hydrocarbons (PAHs) are a group of over 100 different chemicals that are known to be formed typically during incomplete combustion of organic matter at high temperature. Their major sources in the atmosphere include industrial processes, vehicle exhausts, waste incinerations, and domestic heating emissions. Due to their carcinogenic/mutagenic effects, 16 PAHs are currently listed as priority air pollutants.
Pharmaceuticals are now shown to be found in surface, ground, and drinking waters around the world. This could create some potentially damaging environmental effects. Minuscule concentrations of chemicals known as endocrine disruptors, often found in pharmaceuticals, are having detrimental effects on aquatic animals and possibly on human health and development.
Process control and emission monitoring in a waste to energy plant is a challenge. A large number of gaseous components need to be measured with high accuracy. Almost 100% uptime is required and the monitoring system needs to be easy to maintain and fast to calibrate.
Monitoring of emissions from incinerators is a demanding application for Continuous Emission Monitoring Systems. The emissions produced are highly corrosive, some of the gases are soluble and, because the waste being burnt is constantly changing, the resulting stack gas temperature varies widely.
Hydrogen chloride (HCl) is a colorless, sometimes slightly yellow, gas. It is an undesired environmental component that may be damaging to workers and the surroundings. Exposure limits have thus been established by industries to make sure that the workers operate in a safe environment. HCl monitoring is especially required for incinerators, coal-fired power plants, aluminum recycling and cement plants. Unisearch offers a reliable and easy-to-use HCl analyzer – the TDLAS-based LasIR system. Studies have...
Local authorities incinerate domestic waste and other kinds of waste that typically include plastics, batteries and a diversity of unknown compounds. These may all produce acidic and other toxic emissions. Therefore, efficient flue-gas cleaning systems are needed to prevent their release into the environment.
A large pharmaceutical plant runs a Thermal Oxidiser on plant to incinerate their solvent-containing gas streams before emission. When the oxidiser is offline, then the plant must monitor the release of solvent to the atmosphere. A ProtIR 204C fixed monitoring system was installed that continually measures 24 plant solvents, including Acetone, Cyclohexane, DCM, DMF, IPA, MIBK, Toluene and THF. Given the high levels that are possible, the system has an active dilution system, reducing the concentration of the...