Method of and a device for separating paint residuals and solvents from the exhaust air of a paint spray chamber
AssigneeOtto Durr Anlagenbau GmbH
InventorsRolf Gutjahr, Satpal Bhatnagar
Life of this patent
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Abstract
An arrangement for separating paint residuals and solvents from the exhaust air of a paint spray chamber comprises a device for blowing a stream of supply air through the spray chamber to take along exhaust air containing paint and solvent particles, a filtering conveyor located below the chamber for intercepting from the exhaust air paint particles and discharging continuously the same, and a second conveyor arranged below the filtering conveyor and adapted for receiving and discharging a layer of adsorptive material that intercepts solvent particles remaining in the filtered exhaust air.
Claims67
A method of separating paint residuals and solvent particles contained in the exhaust air in a paint spray chamber, comprising the steps of blowing a stream of said exhaust air through filtering means adapted for intercepting paint residuals, thereafter passing said air through an adsorption layer of activated carbon for removing solvent particles therefrom;
- continuously discharging the paint filtering means together with the intercepted paint residuals and the adsorption layer together with the adsorbed solvent particles and simultaneously supplying fresh filtering means and a fresh adsorption layer to said stream;
- exposing the discharged paint filter means to a cleaning process for removing the paint residuals;
- exposing the discharged adsorption layer to a desorption process in which the adsorbed solvent particles are separated from the activated carbon;
- separating carbon dust resulting during the desorption process from the activated carbon and applying the carbon dust as a fuel in a steam generator for providing steam used in the desorption process;
- and returning the cleaned filtering means and activated carbon obtained in said desorption process into said stream of exhaust air.
A device for separating paint particles and solvent particles contained in the exhaust air in a paint spray chamber, comprising means for blowing supply air through said chamber to take along exhaust air loaded with paint particles and solvent particles in said chamber;
- a filtering conveyor carrying a filter material and arranged in the path of said exhaust air stream to intercept paint particles contained in said air stream and an adsorption conveyor covered with adsorption material for intercepting solvent particles from said air stream, said filtering conveyor and said adsorption conveyor being operable for discharging said filtering material and said adsorption material together with the intercepted paint and solvent particles, desorption means cooperating with said adsorption conveyor to receive adsorption material loaded with the solvent particles, said desorption means reactivating in a heating process the adsorption material while separating said solvent particles from said adsorption material;
- said filtering conveyor and said adsorption conveyor each having a receiving end and a discharging end;
- a loading station arranged at the receiving end of said adsorption conveyor for receiving the reactivated adsorption material from said desorption means and discharging the same on said adsorption conveyor and a container arranged at the discharging end of said adsorption conveyor for receiving therefrom the adsorption material saturated with the solvent particles and discharging the same in said desorption means;
- said adsorption material being activated carbon, and said desorption means including a desorption container and a separator for separating carbon dust from the reactivated carbon;
- and a steam generator connected to said desorption container for feeding steam into said desorption container, said steam generator having means for burning the carbon dust separated in said carbon dust separator and directed to said steam generator.
A method of separating paint residuals and solvent particles entrained in the exhaust air in a paint spray chamber, comprising the steps of blowing a stream of said exhaust air through filtering means adapted for intercepting paint residuals and through an adsorption layer of activated carbon for removing solvent particles therefrom;
- discharging the filtering means together with the intercepted paint residuals and adsorption layer together with the adsorbed solvent particles and simultaneously supplying fresh filtering means and a fresh adsorption layer to said stream;
- exposing the discharged adsorption layer to a desorption process so as to reactivate the carbon such that the adsorbed solvent particles are separated therefrom;
- separating carbon dust resulting during the desorption process from the reactivated carbon and applying the carbon dust as a fuel in a steam generator for heating fresh air used in the desorption process;
- and returning the reactivated carbon into said stream of exhaust air.
A method of removing solvent particles from an air stream comprising the steps of passing said stream through an adsorption layer of activated carbon which adsorbs the solvent particles, discharging the adsorption layer from the air stream, exposing the activated carbon of said adsorption layer to a desorption process in which the adsorbed solvent particles are separated from the activated carbon;
- separating carbon dust resulting during the desorption process from the activated carbon and applying the carbon dust as a fuel in a steam generator for providing steam used in the desorption process;
- and returning the activated carbon obtained in said desorption process into said stream of exhaust air.
A device for removing solvent particles from an air stream comprising a conveyor covered with adsorbing material for intercepting the solvent particles from the air stream, desorption means cooperating with said conveyor to receive adsorption material loaded with the solvent particles, said desorption means reactivating in a heating process the adsorption material while separating said solvent particles from said adsorption material;
- said conveyor having a receiving end and a discharging end;
- a loading station arranged at the receiving end of said conveyor for receiving the reactivated adsorption material from said desorption means and discharging the same on said conveyor and a container arranged at the discharging end of said conveyor for receiving therefrom the adsorption material saturated with the solvent particles and discharging the same in said desorption means;
- said adsorption material being activated carbon, and said desorption means including a desorption container and a separator for separating carbon dust from the reactivated carbon;
- and a steam generator connected to said desorption container for feeding steam into said desorption container, said steam generator having means for burning the carbon dust separated in said carbon dust separator and directed into said steam generator.
A device for separating paint particles and solvent particles contained in the exhaust air in a paint spray chamber, comprising means for blowing supply air through said chamber to take along said exhaust air loaded with paint particles and solvent particles in said chamber;
- a filtering conveyor arranged in the path of said exhaust air stream to intercept paint particles contained in said air stream and an adsorption conveyor arranged in the path of said stream behind said filtering conveyor and being covered with an adsorption layer of activated carbon for intercepting solvent particles from said air stream, said filtering conveyor and said adsorption conveyor being operable for discharge together with the intercepted paint and solvent particles, each of said conveyors being in the form of a continuously circulating conveyor band;
- a cleaning station cooperating with a portion of said filtering conveyor to remove paint deposits therefrom;
- a desorption container cooperating with said adsorption conveyor to receive the adsorption layer loaded with solvent particles, said desorption container reactivating in a heating process the adsorption layer while separating said solvent particles from said adsorption layer;
- a separator separating the carbon dust from the reactivated carbon;
- and a steam generator connected to said desorption container for feeding steam into said desorption container and having means for burning the carbon dust separated in said carbon dust separator.
Dependencies are inferred from the claim text.