Comprehensive recovery method for heat energy and water from printing and dyeing industry wastewater and heat-exchanging system

• Main Author: WANG JUNCHUAN
• Format: Patent
• Language: Chinese; English
• Published: 24.06.2009
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses an integrated recovery method and a heat exchanger for the heat energy and water in the wastewater of the printing and dyeing industry. The invention belongs to the technical field of the wastewater treatment in the printing and dyeing industry. The integrated recovery method for the heat energy and water in the wastewater of the printing and dyeing industry comprises the following steps: dividing the printing and dyeing wastewater emitted by a workshop into three types, namely normal temperature water, moderate temperature water and high temperature water, and treating the three types of water separately; after respectively removing impurities through filtration treatment, leading the moderate temperature wastewater and the high temperature wastewater into a high efficiency heat exchange device to carry out the heat exchange with a cold water source and increase the temperature of the cold water source in advance before the cold water source enters a boiler heating room, simultaneousl