Heat exchanger having a resin-coated pipe

Abstract

A heat exchanger having corrosion resistant resin-coated plates and pipes. The heat exchanger is easily constructed using the corrosion resistant resin-coated plates and the pipes. The heat exchanger does not require heat treatments or large constructing sections. In the heat exchanger according to the present invention, a gas is supplied to the outside of pipes, and air and/or water are passed through the pipes. As a result, heat change is accomplished. A pipe plate and a side wall of the heat exchanger are coated with Teflon or a heat resistant resin. In the feed water pre-heater for heating water, pipes are formed as metal pipes coated with a resin for maintaining the strength of the pipes. Thereafter, the pipes are individually welded and fabricated. In the feed air pre-heater, the heat exchanger has side walls, a pipe plate and pipes. The side walls and the pipe plate have essentially the same structure. The pipes are made of resin. The pipe plate and pipes are united by a metal assembling member. The pipe plate and the metal assembling member are fastened together with a pipe adjacent to them by means of four steel wires in order to prevent the separation of the pipe plate from the assembling member in response to the droop or vibration of the resin pipes.