The description relates to a process for reducing acid plume from stacks from coal-fired combustors operating at varying loads, which have typically been treated by back-end calcium carbonate (limestone) which has not been able to effectively control visible acid plume as power is ramped up from low load. According to the process, as high sulfur and high iron coals are burned in a combustor, magnesium hydroxide slurry is introduced into hot combustion gases in or near the combustion zone. And, during ramp up to high load from a period of operation at low load, additional magnesium hydroxide is introduced into an intermediate-temperature zone.

A method for reducing NOx emissions in the exhaust of a combined cycle gas turbine equipped with a heat recovery boiler and a catalyst effective for NOx reduction, wherein a slip stream of hot flowing exhaust gases is withdrawn from the primary gas flow after the catalyst at a temperature of 500 F. to 900 F. and directed through a fan to a continuous duct into which an aqueous based reagent is injected for decomposition to ammonia gas and the outlet of the continuous duct is connected to an injection grid positioned in the primary exhaust for injection of ammonia gas into the primary exhaust stream at a location upstream of the catalyst.

The present disclosure relates to a smoke processing device for processing smoke, which is generated by an indoor industrial site, a restaurant, or a heating means that applies heat and generates smoke, the device including at least: a smoke purification means comprising a smoke collector equipped with a smoke movement duct, the smoke movement duct comprising a smoke purifier for purifying smoke, which has been collected by the smoke collector, and discharging the purified smoke, the smoke purification means comprising a hot air movement duct for moving the smoke purified and discharged by the smoke purifier; and a heat exchange means installed on the smoke movement duct to promote heat exchange of smoke collected by the smoke collector such that the smoke is converted to high-temperature smoke and is moved to the smoke purifier.

An emission control flare stack for minimizing the formation of volatile organic compounds wherein the stack has a controller for operating a gas flow meter; a inlet gas regulator; an oxygen/air flow meter; an oxygen/air regulator; a burner with at least one igniter; a plurality of cooling and heating tubes; and a neutralization solution regulator. The controller receives data from a temperature sensor and an emissions sensor and is in communication with a network. The controller provides controlled burn and neutralization using air intake information and gas concentrations information and can transmit data to an administrative server, cloud computing processor, client devices or combinations thereof for continuous remote viewing of emissions using an executive dashboard.

A limestone supply device is provided for supplying calcium carbonate to an upstream of a desulfurization device and a heat exchanger disposed on an upstream of the desulfurization device on a flue gas duct through which flue gas discharged from a combustion engine in which a fuel burns flows. An air pollution control system having the limestone supply device is provided, including a calcium carbonate accumulate unit configured to accumulate calcium carbonate, a calcium carbonate transport unit configured to transport the calcium carbonate accumulated in the calcium carbonate accumulate unit, a calcium carbonate supply unit configured to supply the calcium carbonate transported by the calcium carbonate transport unit to the flue gas duct, and a moisture supply unit configured to supply moisture to a region to which the calcium carbonate is supplied by the calcium carbonate supply unit.

A stovetop system comprising a stovetop, wound around a burner, supports a vessel to be heated. The hot gas from the burner is guided through an extended path under the vessel's bottom to improve the heating efficiency of a stove on which this standalone stovetop system is installed. Improvements in safety, vessel adaptability, and automatic temperature control of the heating process are also achieved.

An intermixer or mixing device with frame structure and suspended bluff body array for use in a stationary (e.g., non-auto) SCR catalyst environment to reduce RMS levels of a mix of NO.sub.x pollutant and reduction reagent. SCR reactor apparatus with SCR catalyst module block supported on the intermixer. The SCR reactor apparatus works in an SCR reactor assembly having the SCR reactor apparatus at a first SCR1 layer plus a downstream SCR2 layer. The reduced RMS level of the mix coming from the SCR1 layer is readily able to be treated by the SCR2 layer. An SCR system features the SCR reactor assembly and a combustion source such as a coal-fired plant. Methods of assembly and operating each of the mixing device, SCR reactor apparatus, assembly and system are also featured.

Provided is a catalyst apparatus capable of removing perfluorinated compounds or nitrous oxide through a catalyst. A processing gas is introduced into a heat exchange unit, and an exhaust gas having a higher temperature than the processing gas discharged by a heat exchange action is supplied to a heating part. In the heating part, an exhaust gas capable of reacting with the catalyst may be formed through a simple temperature-raising operation, and the perfluorinated compounds or nitrous oxide are effectively removed by the catalyst unit.

The invention discloses an efficient medium and low temperature sulfur-containing flue gas denitration device and method based on Fast SCR reaction, and the sulfur-containing flue gas denitration device and method can be used in a utility boiler and flues on the tail portions of various industrial furnace. The sulfur-containing flue gas denitration device comprises an oxidization module used for oxidizing NO and an SCR reaction module used or denitration, part of NO in flue gas is converted into NO2 through the oxidization module and then enters the SCR reaction module, and pre-oxidized flue gas and sprayed NH3 are mixed and enter a selective catalytic reduction layer to conduct rapid SCR reaction. The catalytic reduction layer is made of a low-vanadium loaded vanadium, tungsten and titanium cellular catalyst, and the reaction temperature is 200-350 DEG C. The denitration system has efficient sulfur poisoning resistance and greatly promotes denitration efficiency of the flue gas low-temperature section, it is verified through experiments that under the low-temperature sulfur-containing flue gas atmosphere at the temperature of 250 DEG C, the system has the obvious denitration effect, and the efficiency can reach 90% or more and is kept stable.