TUBULAR-PLATE HEAT EXCHANGER AND METHOD FOR ITS MANUFACTURE

FIELD: heat engineering, in particular, compressor building, power engineering, chemical and food industries. SUBSTANCE: the tubular-plate heat exchanger has side plates provided with holes, plates with flangings, and tubes passing through the holes of the side plates and plates; the plates have holes with tapered tab flangings; the plate flangings are inclined exponentially at an angle of (0 to 90) deg to the horizontal; the spacing between the tubes and the tabs of the plate flanging does not exceed 0.1 d, where d - outside diameter of the heat-exchange tube and is filled with highly heat transfer corrosion resistant metal, the surfaces of the tubular-plate heat exchanger are protected against corrosion by two layers of corrosion-resistant metals. The space between the tubes and the tabs of the plate flangings may be filled with zinc, the surfaces of the tubular-plate heat exchanger are protected against corrosion with zinc and chromium in succession. The space between the tubes and the tabs of the plate flangings may be filled with cadmium, the surfaces of the tubular - plate heat exchanger are protected against corrosion with cadmium in the first layer. The method for manufacture of the tubular-plate heat exchanger consists in production of holes in the plates with the flangings, threading of the plates onto the tubes and squeezing of the plates; cuts are made in the plate blanks to a depth of 0.5 to 0.95 of their thickness, holes with tapered tab flangings are pressed out in the plate blanks having a diameter of (0.9 to 1.1)d, filled by the method of electrolysisis by highly heat-transfer corrosion resistant metal is the space between the tubes and the tabs of the plate flanges; the surfaces of the tubular-plate heat exchanger are successively protected against corrosion by the method of electrolysis by two layers of corrosion-resistant metals. The space between the tubes and the tabs of the plate flangings is made by the method of galvanizing with zinc, the surfaces of the tubular-plate heat exchanger are successively protected against corrosion by the method of galvanizing with zinc with a subsequent coating with chrome by chromate treatment. Threading of the plates from the middle of the tube is accomplished with opposition of the direction of flanging. The space between the tubes and the tabs of the plate flangings may be filled by cadmium treatment, the surfaces of the tubular-plate heat exchanger is protected against corrosion in the first layer