An air treatment system (1) arranged for treating polluted air (A.sub.pol) at least by means of an air particle filter, and wherein said air treatment system comprises an air treatment unit placed upstream of the air particle filter and being arranged for directing a sub-flow (A.sub.sub) of the polluted air (A.sub.pol) through said air treatment unit (2) and for subjecting the sub-flow (A.sub.sub) to a photooxidation process. The photooxidation process in the air treatment unit (2) is so efficient that the overall concentration of gas-pollution of the combined air flow A.sub.com is significantly reduced whereby large volumes of polluted air can be treated in a fast, inexpensive and effective manner.

Known wet electrostatic precipitators are large and inefficient. The present invention enables the production of smaller, more efficient and long lasting wet electrostatic precipitators by the addition of a central bore in the inner electrode through which a first purge flow is passed and directed into the precipitator chamber, perpendicular to the direction of flow of the gas to be treated through the chamber to urge the particulate into the water curtain. A second, larger, cleaning purge flow is also provided to disturb the water curtain such that it cleans the inner electrode of any deposited particulate.

Known wet electrostatic precipitators are large and inefficient. The present invention enables the production of smaller, more efficient and long lasting wet electrostatic precipitators by the addition of a central bore in the inner electrode through which a first purge flow is passed and directed into the precipitator chamber, perpendicular to the direction of flow of the gas to be treated through the chamber to urge the particulate into the water curtain. A second, larger, cleaning purge flow is also provided to disturb the water curtain such that it cleans the inner electrode of any deposited particulate.

A gas detection purification device is disclosed and includes a main body, a purification unit, a gas guider, a gas detection module and a controlling-driving module. The main body includes an inlet, an outlet, an external socket and a gas-flow channel disposed between the inlet and the outlet. The purification unit is disposed in the gas-flow channel for filtering gas introduced through the gas-flow channel. The gas guider is disposed in the gas channel and located at a side of the purification unit. The gas is inhaled through the inlet, flows through the purification unit and is discharged out through the outlet. The gas detection module is plugged into or detached from the external socket. The controlling driving module is disposed within the main body and electrically connected to the gas guider to control the operation of the gas guider in an enabled state and a disabled state.

Provided is a solvent separation method and a solvent separation apparatus that make it possible to efficiently retrieve the thermal energy possessed by an exhaust atmosphere released in a solvent-removal step to suppress reductions in a temperature of the exhaust atmosphere. In the solvent separation method and the solvent separation apparatus, a vaporized solvent is removed from a gas while heat exchange between the gas within a condensation part and the gas within a dust-collection part is conducted by using a heat exchange part that is placed between the condensation part that introduces the gas into a first direction and the dust-collection part that introduce the gas into a second direction opposite to the first direction the gas discharged from a downstream side of the condensation part.

Provided is a solvent separation method and a solvent separation apparatus that make it possible to efficiently retrieve the thermal energy possessed by an exhaust atmosphere released in a solvent-removal step to suppress reductions in a temperature of the exhaust atmosphere. In the solvent separation method and the solvent separation apparatus, a vaporized solvent is removed from a gas while heat exchange between the gas within a condensation part and the gas within a dust-collection part is conducted by using a heat exchange part that is placed between the condensation part that introduces the gas into a first direction and the dust-collection part that introduce the gas into a second direction opposite to the first direction the gas discharged from a downstream side of the condensation part.

An air treatment system (1) arranged for treating polluted air (A.sub.pol) at least by means of an air particle filter, and wherein said air treatment system comprises an air treatment unit placed upstream of the air particle filter and being arranged for directing a sub-flow (A.sub.sub) of the polluted air (A.sub.pol) through said air treatment unit (2) and for subjecting the sub-flow (A.sub.sub) to a photooxidation process. The photooxidation process in the air treatment unit (2) is so efficient that the overall concentration of gas-pollution of the combined air flow A.sub.corn is significantly reduced whereby large volumes of polluted air can be treated in a fast, inexpensive and effective manner.

An air treatment system (1) arranged for treating polluted air (A.sub.pol) at least by means of an air particle filter, and wherein said air treatment system comprises an air treatment unit placed upstream of the air particle filter and being arranged for directing a sub-flow (A.sub.sub) of the polluted air (A.sub.pol) through said air treatment unit (2) and for subjecting the sub-flow (A.sub.sub) to a photooxidation process. The photooxidation process in the air treatment unit (2) is so efficient that the overall concentration of gas-pollution of the combined air flow A.sub.corn is significantly reduced whereby large volumes of polluted air can be treated in a fast, inexpensive and effective manner.

An axial cyclone air filtration apparatus integrated with a bipolar-charged agglomeration includes a pre-charge region and an axial cyclone coagulation dust separation apparatus, and the pre-charge region is arranged on an air inlet side of the axial cyclone coagulation dust separation apparatus. Suspended particles in air are charged with charges of different polarities in the pre-charge region before entering the axial cyclone coagulation dust separation apparatus. The organic combination of electric coagulation technology and axial cyclone dust separation technology improves the filtering efficiency for ultra-fine particles in air.

An electrostatic filter, for filtering solid and liquid particles in gases composed of a case (3); concentric collectors (15), concentric diffusers (10); electrodes (2); insulated supports (7), distributor disc (8), thermal insulator (17), electrical resistors (4), main collector (9), filter cap (1); the concentric diffusers (10) host along their internal and external wall the electrodes (2); the insulated supports connect the filter cap (1) to the distributor disc (8) which in turn supports the concentric diffusers (10); the electrical resistors (4) are located around the case (3) as clamps and are covered by the thermal insulator (17); so that the gas flows through the filter from the filter inlet (14) located tangentially at the external face of the case (3), towards the insulated outlet (5) located in the central part between the distributor disc (8) and the filter cap (1), thus optimizing the space and surface of the constituent materials and a very high filtration efficiency of liquid and solid micron particles contained in gases at any temperature up to 900 C.