Tubular falling film spraying device

Abstract

The invention discloses a tubular falling film spraying device which comprises an inner tube, a sleeve and a drainage tube. The tube outer diameter of the sleeve and the drainage tube is the same as the tube outer diameter of a working tube; the outer diameter of the inner tube is smaller than that of the sleeve; an opening is formed in the top of the inner tube; a line of outflow holes is formed in the bottom of the sleeve along a straight line; the inner tube is centered inside the sleeve; a semicircular surface spacer is embedded into the top of an inner wall of the sleeve, and a lower edge of the sleeve is just in contact with the outer wall of the inner tube; a midline of the opening of the inner tube, an axis of the inner tube and a midline of the outflow holes in the bottom of the sleeve are positioned on the same vertical plane; the front and rear ends of the opening of the inner tube need to be flush with the outer edge of the outflow hole on the outermost side of the sleeve; more than one sealing tube clamp is respectively used at gaps between the inner tube and the left and right ends of the sleeve; the drainage tube is arranged just under the sleeve, and a spacing between the drainage tube and the sleeve is 2mm; the drainage tube and the sleeve are fixedly welded by welding or a tube plate. According to the device disclosed by the invention, spraying media can be uniformly distributed, and excellent flow pattern and high heat-transfer characteristics are obtained, so that the efficiency of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of liquid distribution devices for falling film technology, and relates to a spray device, in particular to a tubular falling film spray device. [0002] technical background [0003] Falling film flow devices are widely used in seawater desalination systems, absorption refrigeration systems, vapor compression refrigeration systems and other equipment. The falling film device is mainly composed of a liquid distributor, a tube bundle, a liquid discharge pipe, and an exhaust pipe. [0004] The liquid distributor is a device that evenly distributes the working fluid entering the falling film evaporator. It is an important part of the falling film evaporator. To judge the performance of the liquid distributor, it mainly depends on whether it can meet two requirements: ① can Whether the refrigerant is evenly distributed in the entire circumference and length direction of the falling film evaporation heat exchange...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of direct spraying or nozzle spraying of horizontal tube falling film evaporators, especially the shortcomings of uneven local spraying density under large flow conditions, the invention provides a tube type falling film spraying device, which can Maintains an even spray along the pipe throughout the full flow range

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