Layer heat exchanger for high temperatures

Abstract

A layer heat exchanger for high temperatures is provided that includes a layer block having layer plates and cover plates and a housing that accommodates the layer block. The housing has a high heat resistance, combined with a high stiffness, and the layer block has a core that is soft and tough relative to the housing.

1 . A layer heat exchanger for high temperatures, the heat exchanger comprising:
 a layer block having layer plates and cover plates; and   a housing configured to accommodate the layer block, the housing having a high heat resistance, associated with a high stiffness, and the layer block having a soft and tough core relative to the housing.   
     
     
         2 . The layer heat exchanger according to  claim 1 , wherein the housing is made of a material with a high heat resistance. 
     
     
         3 . The layer heat exchanger according to  claim 2 , wherein the material of the housing is a nickel alloy with the material No. 2.4856 according to DIN EN 10095 and the material designation NiCr22Mo9Nb or a ferritic high-temperature stainless steel with the material No. 1.4750. 
     
     
         4 . The layer heat exchanger according to  claim 2 , wherein the material of the housing is an austenitic high-temperature stainless steel with the material No. 1.4876 and with the material designation X10NiCrAlTi 32-20 or with the material No. 1.4835 and with the material designation X9CrNiSiNCe 21-11-2. 
     
     
         5 . The layer heat exchanger according to  claim 2 , wherein the cover and layer plates are made of a material with a lower heat resistance than the housing material. 
     
     
         6 . The layer heat exchanger according to  claim 3 , wherein the material for the cover and layer plates is a high-temperature stainless steel with the material No. 1.4876 with the material designation X10NiCrAlTi 32-20 or a Ni base material with the material No. 2.4851 with the material designation NiCr23Fe. 
     
     
         7 . The layer heat exchanger according to  claim 3 , wherein the material for the cover and layer plates is a ferritic material with the material No. 1.4725 according to DIN 17470 and the material designation CrAl14 4 or the material No. 1.4767 according to DIN 17470 with the material designation CrAl20 5. 
     
     
         8 . The layer heat exchanger according to  claim 7 , wherein the material for the cover and layer plates contains Al with a content of ≧2%, especially preferably of ≧3%. 
     
     
         9 . The layer heat exchanger according to  claim 1 , wherein the wall thickness of the housing is as great as possible in regard to the wall thickness of the cover and layer plates. 
     
     
         10 . The layer heat exchanger according to  claim 9 , wherein the wall thickness of the housing is about 1.5 mm. 
     
     
         11 . The layer heat exchanger according to  claim 9 , wherein the wall thickness of the cover and layer plates is about 0.5 mm, preferably 0.4 mm, especially preferably 0.3 mm. 
     
     
         12 . The layer heat exchanger according to  claim 1 , wherein the housing material includes an especially high-temperature-resistant material with low wall thickness, particularly 2.4856 with a thickness of 1.0 mm or 0.5 mm, and the layer and cover plate material includes an especially soft and thin material, particularly a ferritic material having a thickness of 0.3 mm or 0.4 mm. 
     
     
         13 . The layer heat exchanger according to  claim 1 , wherein the housing and cover plate material is the same high-temperature-resistant material and the layer plates are of the soft material. 
     
     
         14 . The layer heat exchanger according to  claim 1 , wherein the cover and layer plates of the layer block are connectable to one another by bonding on the front side. 
     
     
         15 . The layer heat exchanger according to  claim 14 , wherein the cover and layer plates are soldered to one another on the front side. 
     
     
         16 . The layer heat exchanger according to  claim 14 , wherein the layer plates have sealing edges and wherein the layer plates are welded to one another in the area of their sealing edges. 
     
     
         17 . The layer heat exchanger according to  claim 1 , wherein the housing and the layer block are made of the same material.