1、 Technical Introduction

This device and system comprehensively utilize three major thermal energy recovery devices and systems: medium pressure steam cycle utilization system, hot water intelligent utilization system, and setting machine oil fume purification and waste heat recovery system. It systematically recovers and utilizes the thermal energy generated in the printing and dyeing production process, and integrates digital intelligent management systems such as production ERP system and energy consumption data acquisition system to accurately quantify and analyze the energy consumption of various types of energy such as water, electricity, and steam used in the production process. It has played a significant role in optimizing production processes, improving energy-saving technologies, promoting clean production technologies, and comprehensively utilizing resources.

2、 Technological innovation points

(1) The recovery and utilization technology of medium pressure steam: After the medium pressure steam is discharged from the shaping machine drying room, the pressure is still around 20kg. This project adopts the technology of first stage flash evaporation tank and second stage flash evaporation tank heating pump recovery system to recover a certain amount of medium pressure tail gas to the low-pressure steam pipeline system for recovery and utilization;

(2) Thermal energy recovery technology for printing and dyeing wastewater: This technology adopts a wastewater thermal energy exchange system to exchange thermal energy between the discharged hot wastewater and the production raw water, increasing the temperature of the raw water by about 30 ℃, thereby saving more than 20% of steam energy;

(3) Oil fume purification and waste heat reuse technology for shaping machines: When the gas temperature emitted from the shaping machine flue reaches 170 ℃ or above, the heat energy can be recovered by exchanging cold and hot air and re injecting them into the shaping machine, saving more than 10% of heat energy;