Abstract:
The invention relates to a method and a device for purifying water used for forming a water curtain of a wet spray wall in paint spray and/or glue processing booths, wet dust removal plants and the like. The water to be purified is caught in a receptacle (1) and the water is sucked out under the surface of the water present in said receptacle (1), mixed with air and introduced into a basin (14) at the bottom side of said basin (14). The water mixed with air is introduced into a basin (14) which widens in upward direction, and contaminations floating on the surface of the water present in said basin (14) are pushed towards an outlet disposed near one side of said basin (14) by means of a pusher, whilst the water flows out on the opposite side of the basin via an overflow. A few perforated plates disposed one above the other are provided in the basin (14) whose sectional area gradually increases in upward direction.
Abstract:
An air conditioning system for a paint spray booth is located entirely within the booth below the paint application zone for supplying a modified temperature, humidity, and/or filtrated air to the application zone.
Abstract:
An air supply housing arrangement for a paint spray booth is located at an elevation in the booth such that the air flowing through a booth paint spray zone is processed below a level of water held in a booth recirculation tank.
Abstract:
An improved method and apparatus for removing sludge from a spray booth tank using a single pump for withdrawing liquid including sludge from the tank. A portion of the liquid from the pump is returned to the tank through eductors for agitating liquid in the tank. At least a portion of the liquid from the pump flows through a hydrocyclone separator. Sludge from the separator is collected in a settling tank. A small portion of the clarified liquid from the separator flows through an aspirator pump to the booth tank and the remainder of the clarified liquid is returned directly to the booth tank. The aspirator pump returns excess liquid from the settling tank to the booth tank.
Abstract:
Disclosed is a process for purifying an aqueous effluent which is formed by the scrubbing with water of the exhaust air from paint, lacquer and varnish spray booths. In the process the aqueous effluent is sprayed at a temperature between 10 and 80.degree. C. vertically from top to bottom into an electric field, which is established between a corona electrode and a collecting electrode and has a voltage between 10,000 and 80,000 volts, a field strength between 0.5 and 10 kV/cm and contains air as a dielectric. The aqueous effluent drained from the collecting electrode is received by a separator, in which the particles of coloring matter and any solvent are separated from the water by density separation.
Abstract:
A composition and method for detackifying paint spray booth water containing particles from paint spray is disclosed which uses a reaction product of an aldehyde with either a urea or an aminotriazine or both, and at least one of;(i) a hydrolyzed polyacrylamide;(ii) certain modified tannins in further combination with diallyldialkyl quaternary ammonium polymers or polymers derived by reacting certain dialkylamines with epihalohydrins.
Abstract:
An aqueous solution carrying paint solids is fed through an inlet into a floatation tank. The clean liquid exits through an orifice whose size is controlled by a movable gate. The level of the liquid within the tank is sensed by an ultrasonic rangefinder and the distance signals output from this rangefinder are fed to an electronic controller. During normal operation, this controller periodically supplies power signals to an electric actuator to adjust the position of the gate whereby the level of the liquid in the tank can be maintained substantially at the a first predetermined level. The controller may also include means for causing the liquid to rise to a second predetermined level after a preset time such that the paint solids are transferred over a weir into a collecting vessel. Thereafter the liquid level is caused to rapidly drop and is again maintained at the first level.
Abstract:
The invention relates to a process and an apparatus for extracting droplets of paint from the fine spray or mist in spray booths when sheet metal members or the like are sprayed, without the paint droplets adhering. A calcium chloride solution of 0.01 to 0.5% by weight and having a pH value of 8 to 9.5 serves as washing fluid. To perform this process, the spray booth and the like is followed by a settling or separating vessel in which the coagulated paint droplets floating up with air are separated from the thus regenerated wash solution which can be recycled.
Abstract:
The invention relates to the continuous treatment of a washing liquid for a gas laden with particles. The particle-laden liquid after washing is recycled and used again in admixture with clean liquid.
Abstract:
Waste paint which is contained in an aqueous medium which flows from a paint spraying booth is collected by apparatus which comprises a vessel which is located outside the booth and has at the lower portion thereof an inlet for paint laden aqueous medium or for scum from the surface of aqueous medium in a flotation tank, and an outlet at the lower portion for the passage of aqueous medium from the vessel. A paint solids outlet is associated with the upper portion of the vessel and fluid pressure is applied to a raft of paint solids accumulated in the vessel to cause the flow of paint solids from the vessel into a container.