External guide single shell pass support-free crosscharge curve surface tube energy-saving heat exchanger

Abstract

The invention discloses an external guide single shell pass support-free crosscharge curve surface tube energy-saving heat exchanger, which comprises a shell, a first tube plate, a second tube plate, a first close cover, a second close cover, a strapping steel strip, a heat exchange tube bundle, a first external guide barrel and a second external guide barrel. Shells in a first annular inner cavity and a second annular inner cavity are uniformly provided with a plurality of through holes; heat exchange tubes in the heat exchange tube bundle are crosscharge curve surface tubes which are formed by flattening and twisting circular tubes serving as parent tubes; the cross section of the crosscharge curve surface tubes is oval; and the crosscharge curve surface tubes are contacted in turn and form the tube bundle by means of the self support of contact points of the crosscharge curve surface tubes. The shell pass fluid can uniformly enter a shell pass, and non-flowing regions are reduced. The heat exchange tube bundle consists of the support-free crosscharge curve surface tubes, so turbulence degree of the shell pass fluid is improved and the heat transfer in the tubes is enhanced; and the shell pass is not provided with baffle plates, so the non-flowing regions between the tubes are eliminated, and dirt deposition and corrosion of a tube pass are reduced.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to an energy-saving heat exchanger with an external flow guide single-shell side unsupported alternating curved surface tube. Background technique [0002] Heat exchangers are currently one of the most widely used equipment in industry. According to statistics, there are more than 560,000 heat exchangers in service in the four major industries of my country's petroleum, petrochemical, metallurgy, and electric power. The traditional shell-and-tube heat exchanger is still the most widely used heat exchanger in the industry. One of its important features is that the shell side is equipped with baffles to support the heat exchange tubes and strengthen the shell side fluid disturbance. It has a simple structure, It is easy to process and clean, and can adapt to high temperature and high pressure. For example, Chinese invention patent 200610041949.1 discloses a shell-and-tube heat exchanger with mult...

AI Technical Summary

Problems solved by technology

Although this invention can reduce the vibration during the operation of the heat exchanger and improve the safety, the shell-and-tube heat exchanger also has disadvantages such as large pressure drop on the shell side and flow dead zone.

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