Thermal treatment techniques for recycling are generally very clean but their byproducts include a fine ash that may become entrained in the exhaust air plume as smoke. We therefore disclose a materials recycling apparatus comprising a heat treatment chamber for processing the material at an elevated temperature, the chamber having a vent leading via a heat exchanger to a scrubber comprising a disrupted flow path, at least one spray nozzle directed towards the disrupted flow path, and a supply of liquid (ideally water with a little detergent) to the or each spray nozzle. In this way, the entrained ash can be efficiently removed from the air flow, allowing it to be vented, and the captured ash disposed of via a waste water outlet together with the ash washed from the chamber. The flow path can be disrupted by at least one baffle plate, ideally with the spray nozzle located ahead of the baffle plate(s). Thermal treatment techniques for recycling are generally very clean but their byproducts include a fine ash that may become entrained in the exhaust air plume as smoke. We therefore disclose a materials recycling apparatus comprising a heat treatment chamber for processing the material at an elevated temperature, the chamber having a vent leading via a heat exchanger to a scrubber comprising a disrupted flow path, at least one spray nozzle directed towards the disrupted flow path, and a supply of liquid (ideally water with a little detergent) to the or each spray nozzle. In this way, the entrained ash can be efficiently removed from the air flow, allowing it to be vented, and the captured ash disposed of via a waste water outlet together with the ash washed from the chamber. The flow path can be disrupted by at least one baffle plate, ideally with the spray nozzle located ahead of the baffle plate(s).

The disclosure concerns a system for the removal of particulate from a waste vapor stream from a hydrocarbon production process. The particulate can be removed from the waste vapor stream using a series of water streams and gravity separation.

A powder removing apparatus according to an embodiment includes a first tank in which a powder produced by burning a process gas is collected; a duct with a hollow to which the powder is carried and to which a flow of a liquid is supplied, the duct that is connected to the first tank and that allows the powder to flow from the hollow into the first tank by the flow of the liquid; and a pump that supplies the liquid to the hollow.

The present invention relates to an air purification apparatus for a coal-fired electric power plant, and more specifically to an air purification apparatus for a coal-fired electric power plant, which, first, can filter out wastes of contaminated smoke by using limewater, which, second, can filter out fine dust and carbon dioxide included in the smoke, which, third, can convert waste gas including carbon monoxide in a state in which only smoke remains into carbon dioxide by reacting oxygen with the waste gas and purify the smoke into clean air by allowing a sodium hydroxide solution to absorb the carbon dioxide, and which, fourth, can eliminate humidity from the clean air by passing the clean air through a moisture condenser a plurality of times and discharge clean air in a pure smoke state from the power plant.

Wet flue gas desulfurization systems and methods for contacting a flue gas with a scrubbing liquid to produce ammonium thiosulfate. The scrubbing liquid absorbs sulfur dioxide and optionally additional acidic gases from the flue gas to produce a scrubbed flue gas, the scrubbing liquid with the absorbed sulfur dioxide therein is collected, and ammonia and elemental sulfur are introduced into the collected scrubbing liquid to react the ammonia, the absorbed sulfur dioxide, and the elemental sulfur in the collected scrubbing liquid to produce ammonium thiosulfate.

A spray pipe is disclosed, which includes: a pipe portion, having a cylindrical shape, and configured to extend along an axis in the horizontal direction, a distal end portion of the pipe portion being closed; a plurality of nozzle portions configured to guide an absorbing liquid, flowing through the pipe portion in the horizontal direction, upward in a vertical direction, the plurality of nozzle portions being arranged at a plurality of positions on an upper end portion of the pipe portion in the vertical direction; and a leg portion disposed on a lower end portion of the pipe portion in the vertical direction, and having an installation surface along the horizontal direction, wherein the leg portion-is disposed in a state where the installation surface is made to oppositely face a support surface of a pipe support installed on the absorption tower, the support surface extending along the horizontal direction.

Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

A wet abatement system which can suppress the accumulation of foreign matters in a treatment gas line is proposed. There is provided a wet abatement system for detoxifying treatment gas by bringing the treatment gas into contact with liquid. The wet abatement system includes an inlet casing having an inlet port from which the treatment gas is let in and an outlet port provided below the inlet port and through which the treatment gas flows, and a liquid film forming device provided between the inlet port and the outlet port and configured to form a liquid film on an inner wall surface of the inlet casing. A heater configured to heat the inlet casing is embedded in an interior of a wall portion of the inlet casing, the wall portion constituting a portion situated above the liquid film forming device.

The present invention relates to a method and to an apparatus for separating an exhaust gas, in particular an exhaust gas of a boiler, comprising introducing a gas stream of exhaust gas inside a washing chamber, dispensing a pressurized liquid shaped as drops inside the washing chamber, wherein the delivery pressure is adjusted according to the specific particulate to be separated so as to provide, during the separating step, a physical interaction between the delivered liquid drops and the particulate particles.