Cooling tower having reduced microbial contamination

Abstract

The invention relates to a cooling tower in which contamination with and proliferation of microorganisms can be prevented by incorporating composite materials and/or material combinations and an antimicrobial substance containing tungsten and/or molybdenum into the cooling tower.

1 . Cooling tower including a cooling system, wherein the cooling system has at least one installation of at least one composite material and/or at least one material combination and a substance causing the formation of hydrogen cations in contact with an aqueous medium and containing molybdenum and/or tungsten. 
     
     
         2 . Cooling tower according to  claim 1 , wherein the cooling system is a cooling water system. 
     
     
         3 . Cooling tower according to  claim 2 , wherein the installation is a droplet separator. 
     
     
         4 . Cooling tower according to  claim 2 , wherein the installation is a flow installation. 
     
     
         5 . Cooling tower according to  claim 1 , wherein at least one component of the composite material and/or of the material combination contains a polymer matrix. 
     
     
         6 . Cooling tower according to  claim 5 , wherein the polymer matrix contains polypropylene. 
     
     
         7 . Cooling tower according to  claim 1 , wherein the substance is incorporated in the polymer matrix. 
     
     
         8 . Cooling tower according to  claim 2 , wherein the solubility of the substance in the cooling water is smaller than 0.1 moles/liter. 
     
     
         9 . Cooling tower according to  claim 1 , wherein the substance is Mo oxide or W oxide. 
     
     
         10 . Cooling tower according to  claim 1 , wherein the Mo oxide is MoO 2  and/or MoO 3 . 
     
     
         11 . Cooling tower according to  claim 1 , wherein the W oxide is tungsten blue oxide and/or WO 3 . 
     
     
         12 . Cooling tower according to  claim 1 , wherein the substance is molybdenum, a molybdenum alloy and/or a molybdenum compound, wherein the surface has a Mo oxide layer. 
     
     
         13 . Cooling tower according to  claim 1 , wherein the substance is tungsten, a tungsten alloy and/or a tungsten compound, wherein the surface has a tungsten oxide layer. 
     
     
         14 . Cooling tower according to  claim 12 , wherein the molybdenum compound is molybdenum carbide, molybdenum nitride, molybdenum silicide and/or molybdenum sulfide. 
     
     
         15 . Cooling tower according to  claim 13 , wherein the tungsten compound is tungsten carbide, tungsten nitride, tungsten silicide and/or tungsten sulfide. 
     
     
         16 . Cooling tower according to  claim 1 , wherein the substance is present as a component of a layer. 
     
     
         17 . Cooling tower according to  claim 16 , wherein the layer is composed of Mo oxide and/or W oxide. 
     
     
         18 . Cooling tower according to  claim 16 , wherein the layer is composed of Mo and Mo oxide or W and W oxide. 
     
     
         19 . Cooling tower according to  claim 16 , wherein the layer is composed of MoO 3 . 
     
     
         20 . Cooling tower according to  claim 1 , wherein the substance has a particle size according to Fisher of <5 μm. 
     
     
         21 . Cooling tower according to  claim 7 , wherein the mass content of the substance in the composite material and/or material combination is 0.1 to 50% by vol.