Shell and tube type heater

Abstract

The invention discloses a shell and tube type heater. The heater comprises an upper head, a heating container, a tube plate which is horizontally mounted and an electric heating pipe vertically mounted, the tube plate is connected with the electric heating pipe through a screw sleeve and a clamping sleeve, the screw sleeve and the clamping sleeve are coaxially wound on the outer wall of the electric heating pipe, the clamping sleeve is mounted below the screw sleeve, the outer thread of the screw sleeve and the inner thread of the tube plate are engaged, a blade of the clamping sleeve is clamped to the wall of the electric heating tube, the upper head and the upper surface of the tube plate define a first space, the heating container is used for containing heated liquid, the liquid face ofthe heated liquid and the lower surface of the tube plate define a second space, the bottom end of the electric heating tube is located below the liquid level of the heated liquid, the shell and tubetype heater further comprises a ventilation pipe penetrating through the tube plate, being up to the first space, and being down to the second space, according to the shell and tube type heater, pressure-resisting needs of the tube plate, the upper head and a flange can be reduced, meanwhile, the material level of the tube plate, the upper head and the flange can be reduced, and the weight is reduced.

Description

technical field [0001] The invention relates to a shell and tube heater. Background technique [0002] The connection technology of tubes and tube-sheet joints is one of the difficult problems in the manufacture of pressure vessels, especially the manufacture of high-temperature and high-pressure vessels. The connection between the tube and the tube sheet has stricter requirements, such as heat exchangers and heaters in large factories. At present, the welding method is mainly used to connect the tube and the tube sheet. However, the welding process is not only complicated, but also has strict requirements on the quality of the surface material of the tube sheet. Corrosion and leakage and other issues. [0003] In addition, in actual production, in order to ensure that the strength, stiffness and pressure resistance of the tube sheet meet the process requirements, the thickness of the tube sheet is greatly increased, the flange is heavier and the upper head is bulky, such ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the complicated welding method used for the heating tube and the tube sheet in the existing shell and tube heater, and in order to ensure the strength and pressure resistance performance requirements, the upper head, the equipment flange and the tube sheet Due to the defects of high material grade requirements, high cost, and heavy weight, a shell-and-tube heater is provided

Images