Device for removing wet paint overspray

Abstract

The invention relates to a device for removing wet paint overspray from an outgoing air flow ( 120 ) containing over-spray particles. The device separates wet paint over-spray from an over-spray particle contained in an exhaust air stream ( 120 ). The overspray particles in the exhaust air stream ( 120 ) are formed during the painting at an application area ( 108 ) of a painting installation ( 100 ). The device ( 126 ) comprises of at least one separation apparatus for separating the over-spray from the exhaust air stream ( 120 ). The separation apparatus includes a regeneratable surface filter ( 146 ) and the flow path of the exhaust air stream ( 120 ) from the application area ( 108 ) to a separating device ( 145 ) having at least one narrowed area ( 146 ). The central direction of flow of the exhaust air stream ( 120 ) remains essentially preserved in passing by the narrowed area ( 140 ).

1 - 30 . (canceled) 
     
     
         31 . Installation for painting objects, in particular vehicle bodies, comprising at least one painting booth and at least one device for separating wet paint over-spray from an over-spray particle-containing exhaust air stream, wherein the overspray particles pass into the exhaust air stream in an application area of the painting installation;
 wherein the device for separating wet paint over-spray from the exhaust air stream comprises at least one separation device for separating the over-spray from at least a part of the exhaust air stream, which has at least one filter element,   wherein the flow path of the exhaust air stream from the application area to the separation device has at least one narrowed area,   wherein the device for separating wet paint over-spray from the exhaust air stream includes at least one pre-coat supply device which is disposed at the narrowed area of the flow path of the exhaust air stream and delivers a pre-coat material into the exhaust air stream, and   wherein at least one filter element has a barrier layer including the pre coat material, which prevents agglutination of a filter surface.   
     
     
         32 . Installation according to  claim 31 , wherein the narrowed area is disposed beneath the application area. 
     
     
         33 . Installation according to  claim 31 , wherein the painting booth has a longitudinal direction, and wherein the narrowed area extends in the longitudinal direction of the painting booth over substantially the entire length of the painting booth. 
     
     
         34 . Installation according to  claim 31 , wherein the painting booth has a longitudinal direction, and wherein the narrowed area is divided in the longitudinal direction of the painting booth into a plurality of narrowed sub-areas. 
     
     
         35 . Installation according to  claim 31 , wherein the painting booth has a longitudinal direction, and wherein the narrowed area is not sub-divided in the longitudinal direction of the painting booth. 
     
     
         36 . Installation according to  claim 31 , wherein the painting booth has a transverse direction, and wherein the narrowed area is divided into a plurality of narrowed sub-areas in the transverse direction of the painting booth. 
     
     
         37 . Installation according to  claim 31 , wherein the painting booth has a transverse direction, and wherein the narrowed area is not sub-divided in the transverse direction of the painting booth. 
     
     
         38 . Installation according to  claim 31 , wherein the entrance of the exhaust air stream into the narrowed area is disposed above the at least one filter element. 
     
     
         39 . Installation according to  claim 31 , wherein the device for separating wet paint over-spray from the exhaust air stream includes at least one flow guidance element, which directs at least a portion of the exhaust air stream to the narrowed area. 
     
     
         40 . Installation according to  claim 39 , wherein the flow guidance element exhibits at least one flow guidance surface which is, at least in a section thereof, substantially horizontally aligned. 
     
     
         41 . Installation according to  claim 39 , wherein the flow guidance element exhibits at least one flow guidance surface which is, at least in a section thereof, inclined against the horizontal. 
     
     
         42 . Installation according to  claim 31 , wherein the device for separating wet paint over-spray from the exhaust air stream has a base, which limits the flow path of the exhaust air stream downwards, and wherein at least a part of the base is covered by an area separated from an area of the device for separating wet paint over-spray from the exhaust air stream flowed-through by the exhaust air stream. 
     
     
         43 . Installation according to  claim 42 , wherein the device for separating wet paint over-spray from the exhaust air stream includes a top boundary wall of the area separated from the area of the device for separating wet paint over-spray from the exhaust air stream flowed-through by the exhaust air stream, which top boundary wall forms at least a part of a flow guidance element, which directs at least a part of the exhaust air stream to the narrowed area. 
     
     
         44 . Installation according to  claim 31 , wherein the supply of the pre-coat material into the exhaust air stream takes place continuously. 
     
     
         45 . Installation according to  claim 31 , wherein the supply of the pre-coat material into the exhaust air stream takes place in intervals. 
     
     
         46 . Installation according to  claim 31 , wherein the at least one filter element is capable of being cleaned in intervals. 
     
     
         47 . Installation according to  claim 31 , wherein the at least one filter element exhibits a moist surface in the operation of the device for separating wet paint over-spray from the exhaust air stream. 
     
     
         48 . Installation according to  claim 47 , wherein a surface of the at least one filter element is capable of being rinsed-off continuously or in intervals. 
     
     
         49 . Installation according to  claim 31 , wherein the at least one filter element is capable of being cleaned by compressed air pulses. 
     
     
         50 . Installation according to  claim 31 , wherein the device for separating wet paint over-spray from the exhaust air stream contains an air circulation circuit, in which the exhaust air stream, from which the wet paint over-spray has been separated, is at least partially supplied to the application area again. 
     
     
         51 . Installation according to  claim 31 , wherein the installation comprises a collection belt for receiving pre-coat material and wet paint over-spray from a plurality of filter elements and for transporting the pre-coat material and the wet paint over-spray along a conveying direction of the objects to be painted. 
     
     
         52 . Installation according to  claim 31 , wherein the passage cross-section at the narrowed area is so small that turbulences appear in the exhaust air stream, which distribute the pre-coat material in the exhaust air stream. 
     
     
         53 . Installation according to  claim 31 , wherein the pre-coat material comprises lime, an aluminum silicate, an aluminum oxide, a silicon oxide or coating powder.