The present invention relates to a self-contained unit having a system for recovering polymer over spray from a pallet coating process. The self-contained unit includes a common enclosure having at least four walls, a ceiling and a floor. There is a collection tank located below the floor of the common enclosure and a roof platform is located above the ceiling of the common enclosure. Within the common enclosure is at least one spray booth having a waterfall wall with liquid flowing down a face of the waterfall wall to the collection tank. Mounted on the roof platform is a consolidation tank, hydrocyclone and pressure filter that are all part of the system for removing the polymer from the over spray mixture collected at the collection tank.

The present invention relates to a self-contained unit having a system for recovering polymer over spray from a pallet coating process. The self-contained unit includes a common enclosure having at least four walls, a ceiling and a floor. There is a collection tank located below the floor of the common enclosure and a roof platform is located above the ceiling of the common enclosure. Within the common enclosure is at least one spray booth having a waterfall wall with liquid flowing down a face of the waterfall wall to the collection tank. Mounted on the roof platform is a consolidation tank, hydrocyclone and pressure filter that are all part of the system for removing the polymer from the over spray mixture collected at the collection tank.

The present invention has an object to efficiently precipitate a paint residue. A system (10) of collecting a paint residue includes: a bubble-containing functional water generation portion (6) which is configured so as to generate functional water that is bubble-containing alkaline water or acid water; a paint collecting portion (1) which collects the paint residue with the functional water; and a storage portion (2) which recovers the functional water from the paint collecting portion and which stores the functional water.

An exhaust/drainage mechanism includes an exhaust channel guiding contaminated air discharged from a coating booth with non-attached paint; a drainage channel guiding contaminated water discharged from the booth; a scum receiving inlet included in the drainage channel and into which the floating coating scum floating on the contaminated water flows; and a dual-purpose flow channel used as both the exhaust and drainage channel. The contaminated air flows through an upper part of the dual-purpose flow channel, and the contaminated water flows through a lower part. A wind pressure of the contaminated air generates, in an upper part of the contaminated water, an upper-layer flow flows in a direction or at a velocity different from a direction or a velocity of a flow in a lower part of the contaminated water. A dynamic pressure of the upper-layer flow pushes and moves the floating coating scum to the scum receiving inlet.

An exhaust/drainage mechanism includes an exhaust channel guiding contaminated air discharged from a coating booth with non-attached paint; a drainage channel guiding contaminated water discharged from the booth; a scum receiving inlet included in the drainage channel and into which the floating coating scum floating on the contaminated water flows; and a dual-purpose flow channel used as both the exhaust and drainage channel. The contaminated air flows through an upper part of the dual-purpose flow channel, and the contaminated water flows through a lower part. A wind pressure of the contaminated air generates, in an upper part of the contaminated water, an upper-layer flow flows in a direction or at a velocity different from a direction or a velocity of a flow in a lower part of the contaminated water. A dynamic pressure of the upper-layer flow pushes and moves the floating coating scum to the scum receiving inlet.

A wet scrubber having a body that is molded from a plastic material in combination with a nozzle insert that is removably received in the inlet of the wet scrubber and configured to optimize the speed of fluid flow entering a mixing chamber provided in the wet scrubber. Interchangeable nozzle inserts allow to optimize operation of the wet scrubber for different processes the wet scrubber is operating in conjunction with.

To efficiently perform an adhesion reduction treatment of water that circulates through a wet paint booth which contains a solvent-based paint by adding a relatively small amount of chemical to the water without the need for another chemical except that the alkaline chemical is used for pH adjustment, that is, with only one chemical. An aluminum salt having a basicity of 60% or more and an alkaline chemical are added to water that circulates through a wet paint booth which contains a solvent-based paint. An adhesion reduction treatment of the solvent-based paint is performed at a pH of 7 or more and is preferably performed at a pH of 7.5 or more. Using a powder mixture produced by mixing a powder of the aluminum salt with a powder of the alkaline chemical facilitates the treatment.

To efficiently perform an adhesion reduction treatment of water that circulates through a wet paint booth which contains a solvent-based paint by adding a relatively small amount of chemical to the water without the need for another chemical except that the alkaline chemical is used for pH adjustment, that is, with only one chemical. An aluminum salt having a basicity of 60% or more and an alkaline chemical are added to water that circulates through a wet paint booth which contains a solvent-based paint. An adhesion reduction treatment of the solvent-based paint is performed at a pH of 7 or more and is preferably performed at a pH of 7.5 or more. Using a powder mixture produced by mixing a powder of the aluminum salt with a powder of the alkaline chemical facilitates the treatment.

The present invention relates to an aqueous separation liquid comprising at least 49.9 wt. % water, 5 to 50 wt. % of at least one organic water-soluble polyol, based on the total weight of the aqueous separation liquid, and at least one low molecular weight cellulose derivative as rheology modifier, and to the use of this liquid in a process for removing paint overspray from a paint spray booth.

The present invention relates to an aqueous separation liquid comprising at least 49.9 wt. % water, 5 to 50 wt. % of at least one organic water-soluble polyol, based on the total weight of the aqueous separation liquid, and at least one low molecular weight cellulose derivative as rheology modifier, and to the use of this liquid in a process for removing paint overspray from a paint spray booth.