Plate-type heat recovery heat exchanger

The invention provides a plate typed waste heat recovery heat exchanger. The technical problems needed to be solved are as follows: the prior tube typed economizer and air pre-heater (such as cast iron economizer) has low heat transmission efficiency, is easy to be blocked, is not convenient to be maintained, is not easy to be cleaned, and has high manufacture cost, large volume and short service life and so on and the usage is limited. The plate typed waste heat recovery heat exchanger has the key points that the lateral sides of every two double-face convex bubble shaped plates are welded with takeovers, and a plate bundle is formed, and then a I flow channel is formed. Two plate bundles are welded together, and an II flow channel is formed between every two plate bundles. A plurality of plate bundles form a complete machine. The takeovers on the plate bundle are welded with connecting pipes and connected with inlet flanged pipes. The plate typed waste heat recovery heat exchanger is used for recovering the