A desulfurization wastewater zero discharge treatment method and system suitable for multiple working conditions. A tail flue of a boiler and a bottom outlet of a wastewater drying tower are both communicated with an inlet of a dust collector; an outlet of the dust collector is communicated with flue gas inlets of a wastewater concentration tower and a desulfurization absorption tower; the wastewater concentration tower is communicated with the desulfurization absorption tower; the desulfurization absorption tower is communicated with a chimney; the desulfurization absorption tower is communicated with a gypsum cyclone; the gypsum cyclone is communicated with a filtrate water tank; the gypsum cyclone is communicated with a gypsum dewatering machine; the gypsum dewatering machine is communicated with a gas liquid separating tank; and a flue gas port of the tail flue of the boiler is communicated with the flue gas inlet of the wastewater drying tower.

An exhaust gas treatment system includes: a dust collection facility that includes a denitration layer on which a denitration catalyst is carried and through which exhaust gas passes; a carbon dioxide recovery device that is positioned on a downstream side of the dust collection facility in a flow direction of the exhaust gas; a first heat recovery device that is positioned on an upstream side of the dust collection facility in the flow direction of the exhaust gas and that performs heat exchange between the exhaust gas and a heat medium; a sensor that includes a first thermometer capable of detecting a temperature of the exhaust gas flowing between the first heat recovery device and the dust collection facility, and a second thermometer capable of detecting a temperature of the exhaust gas flowing between the dust collection facility and the carbon dioxide recovery device; and a control device.

A process and related plant are used for treating a raw vent gas containing bitumen vapours released by equipment of a polymer-bitumen membranes production line, in which operations involve a filler powder, such mixing the filler powder with the bitumen, during which the filler powder is incorporated into the raw vent gas that is initially powder-free. The process includes first conveying the raw vent gas into a gas-washing device along with a solution of a surfactant and then contacting the raw vent gas with the solution and removing the powder from the powder-containing gas. A purified vent gas that is substantially free from the filler powder is released. The purified vent gas is conveyed into a boiler, and the bitumen vapours are burned. The process prevents the powder from quickly reaching the boiler making the burner and the heat-exchange surfaces ineffective.

A combustion system including a bypass which opens to the open air during two different operating modes (conventional combustion; oxy-combustion), and which has the function, on the one hand, in the two operating modes, when the discharge valve is at least partially open and the recycling valve is closed or open, of allowing air to enter the recycling loop, and which has the function, on the other hand, in the second operating mode, when the discharge valve is closed and the recycling valve is open, of allowing a surplus of the combustion gas produced by the combustion device to be discharged from the recycling loop, the other fraction of the combustion gas produced by the combustion device supplying the mixer.

A method for removing noxious, hazardous, toxic, mutagenic, and/or carcinogenic compounds and/or precursor compounds from a comingled gas, liquid, and/or solid stream is described. In one embodiment, the method is used to prepare the stream for feeding to an oxidizer, such as a thermal oxidizer, to reduce the amount of particulate matter discharged by the oxidizer and includes passing the stream through an ambient or chilled temperature condenser followed by an optional gas/solid separator, and one or more gas scrubbers prior to feeding to the oxidizer.

The present invention relates to a technique for treating a raw material, such as combustible waste, and more particularly to combustion, and pyrolysis and gasification treatment techniques that does not emit carbon dioxide into the atmosphere. A treatment apparatus includes a fluidized-bed furnace having a pyrolysis chamber and a combustion chamber therein, the pyrolysis chamber and the combustion chamber are separated by a partition wall, an electrolysis device configured to electrolyze water to generate hydrogen and oxygen, a methanation reactor configured to produce methane from carbon dioxide discharged from the combustion chamber and the hydrogen, a first fluidizing-gas supply line configured to supply a first fluidizing gas to the pyrolysis chamber, and a second fluidizing-gas supply line configured to introduce a second fluidizing gas to the combustion chamber, the second fluidizing gas including the oxygen and a part of the carbon dioxide.

A method of cooling an abatement apparatus for abatement of an effluent stream from a semiconductor processing tool includes: providing at least one modular cooling assembly having a cooling capacity; determining a cooling requirement of an abatement apparatus; and incorporating into the abatement apparatus a number of the modular cooling assemblies whose cumulative cooling capacity at least matches the cooling requirement of the abatement apparatus. In this way, multiple modular cooling assemblies may be incorporated into the abatement apparatus, each of which provides cooling capacity. The number of modular cooling assemblies can be selected to suit the cooling requirement of the abatement apparatus.