MULTI-TUBE HEAT EXCHANGER

PROBLEM TO BE SOLVED: To provide a multi-tube heat exchanger capable of both having superior heat exchange efficiency and preventing solid matter in a liquid to be treated from being deposited on a closing plate.SOLUTION: The present invention relates to a multi-tube heat exchanger that comprises a storage pipe 40 configured to allow a heat exchanging medium to circulate outside a plurality of circulation pipes 20 in which a liquid to be treated which contains solid matter circulates, at least one or more heat exchanger bodies 10 each comprising a closing plate for closing an opening of the storage pipe 40, and a liquid introduction member for the liquid to be treated, and also has, at a coupling part for the liquid introduction member, a large-diameter coupling part 43 having a larger diameter than small-diameter parts of other parts including an exit side. The large-diameter coupling part 43 is closed with a large-diameter closing plate 32 having a larger diameter than a closing plate 31 provided on the exit side, and also connected to the liquid introduction member, and the plurality of circulation pipes 20 are arranged at intervals of predetermined size with adjacent pipes in the small-diameter part 42, and at larger intervals toward the large-diameter closing plate 32 in the large-diameter coupling part 43.SELECTED DRAWING: Figure 2 【課題】優れた熱交換効率と、被処理液体中の固形物の閉止板への堆積防止との両立を実現できる多管式熱交換器を提供する。【解決手段】固形物を含有する被処理液体が流通する複数の流通管２０の外側に熱交換媒体が流通するように構成した収納管４０、及び収納管４０の開口を閉止する閉止板を備えた少なくとも一本以上の熱交換器本体１０と、被処理液体の液体導入部材とを備える多管式熱交換器であって、液体導入部材との連結部には出口側を含めた他の部分の小径部より大径の大径連結部４３を有し、大径連結部４３は出口側に設けられた閉止板３１より大径の大径閉止板３２で閉止され且つ液体導入部材に接続されており、複数の流通管２０は小径部４２内では隣接する管との間隔が所定寸法で配置され、大径連結部４３内では大径閉止板３２に近いほど間隔が大きい大間隔となっている。【選択図】図２