Heat exchange device used for coal gasification waste water

The invention relates to the field of coal gasification water treatment, in particular to a heat exchange device used for coal gasification waste water. The heat exchange device comprises a vertical heat exchanger, a particle injection device, a particle separation device and particles used for descaling. Through arrangement of the particles used for descaling, internal descaling of a heat exchange pipe is finished under the effect of water pressure of waste water, and the defects that halting is caused because of blocking of the heat exchanger and the like are avoided; through arrangement of the particle separation device, separation and recycle of the particles and waste water are realized, so that economic cost is reduced; the injection device is arranged and connected with a particle recycle device, so that the recycled particles can be injected into the heat exchanger afresh, and a circular descaling effect is realized. 本发明涉及煤气化水处理领域，具体为用于煤气化废水的换热装置。包括立式换热器、颗粒注入装置、颗粒分离装置和用于除垢的颗粒。通过设置用于除垢的颗粒，在废水水压的作用下完成对换