Welded type planar film spray nozzle

Abstract

The invention discloses a welded type planar film spray nozzle, comprising a spray pipe, water film plates and a baseplate, wherein, the spray pipe and the water film plates are made of stainless steel; two spray channels of the spray pipe are a split structure and are formed by combining two stainless steel elbow pipes; the baseplate is provided with pilot holes which are matched with the outside diameter of the two stainless steel elbow pipes; the two stainless steel elbow pipes are respectively installed in the pilot holes and are welded and fixed, the injection orifices of the two stainless steel elbow pipes are arranged in a reverse symmetry manner; the two water film plates are vertically welded on the baseplate and are respectively corresponding to the injection orifices of the two stainless steel pipes; and the bending radius of the stainless steel elbow pipes range from R20 to 40 mm, included angles formed by the end faces of the injection orifices and the water film plates range from 25 to 30 degrees, the film forming faces of the water film plates are pressed into special molded lines, a cambered face is arranged on the top thereof, the corner radius thereof ranges from R30 to 40 mm, the length of the water film plates ranges from 100 to 120 mm, and the width ranges from 60 to 80mm. Compared with the existing film spray nozzle, the welded type planar film spray nozzle has the advantages of no rusting, scouring resistance, long service life, stable formed water film, smooth surface, small waterline, large area of water film, etc.

Description

technical field [0001] The invention relates to a flat film nozzle, which is used for spraying liquid medium into a flat film for mixing with other media or exchanging heat. Background technique [0002] In industry, it is often necessary to spray liquid medium into a flat film, mix with other medium or exchange heat. For example, the exhaust steam after the steam turbine has done work needs to be condensed into liquid water in the condenser and returned to the boiler for recycling. The condenser uses membrane nozzles to spray water into it, and the water and steam are directly mixed for heat exchange to condense the steam. into liquid water. Raw water needs to be supplemented in the condensed water to maintain the water balance of the system. The supplemented water must be heated to the saturation temperature by the hybrid heat exchanger before being sent to the boiler. The hybrid heat exchanger also uses membrane nozzles to spray water into it. It is directly mixed with ...

AI Technical Summary

Problems solved by technology

[0004] 1. Because the material is cast iron or cast steel, carbon steel plate, the membrane nozzle is easy to rust, not resistant to erosion, and has a short service life

[0005] 2. Due to the casting process, the inner wall of the nozzle 2 has poor roughness, the flow channel is not smooth, and the order of the sprayed water flow is poor. After acting on the water film plate 3, the formed water film has many waterlines and the surface is not smooth. The water film is smooth and unstable; and the curvature of the nozzle 2, the angle precision between the nozzle section and the water film plate is not high, and the film forming effect is poor; the size and shape of the two nozzles are difficult to cast completely consistent and consistent. Symmetry, the two water films formed are also different

[0006] 3. Since the water film plate is a flat carbon steel surface, the surface is not smooth after corrosion, and the film forming surface is an ordinary plane, the film forming effect is poor, and the formed water film area is small

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