SLUDGE HYDROLYSIS DEVICE, A SLUDGE HYDROLYSIS METHOD USING THE SAME, AND A CONTACT TYPE OF HEAT EXCHANGE UNIT AND STEAM TYPE OF HEAT EXCHANGE UNIT PROVIDED IN THE SLUDGE HYDROLYSIS DEVICE

摘要

In the present invention sludge is continuously subjected to hydrolysis by being heated with steam and, in the hydrolysis process, heat exchange is carried out between the low temperature sludge and the hydrolysed high temperature sludge, thereby making it possible to reduce the energy used to heat the low temperature sludge and obviating the need for equipment to cool the high temperature sludge.