Jiema Heat Recovery Exchanger for Textile Industry

Industry Status

According to the report: Affected by the global spread of the epidemic, our country's textile manufacturing industry has been hit hard, especially since the first quarter, due to epidemic control factors, our country's textile industry has encountered difficulties in resuming work and production, although some companies have resumed work in late February. However, the subsequent intensification of overseas epidemics has led to the loss of orders. February-May is the traditional production season for textile and garment enterprises. Once lost, it is difficult to make up for it, especially for large textile and garment enterprises.

Our country's textile printing and dyeing scale is large and the process route is long. While creating huge economic benefits, it also brings serious environmental pollution problems. Among them, the more prominent problems are the energy consumption and exhaust gas pollution of printing and dyeing setting machines.

As we all know, the printing and dyeing industry is an industry with high energy consumption. The energy consumption in the production and processing process is mainly composed of heat energy, of which 30%~40% is used for drying, 25%~35% is used for washing, and 10%~15% is used for cooking, 8%~12% is used for high temperature heat treatment, and 5%~10% is used for others.

The energy loss is mainly the heat loss of liquid discharge and steam discharge and the surface heat dissipation loss of pipeline equipment. At present, the thermal efficiency of printing and dyeing equipment in our country is low. For example, the heat loss of the dryer is 40%, the heat loss of the cooking machine is as high as 80%, and the thermal efficiency of the heat setting machine is only 18% to 26%. Most of the heat emitted has not been recycled. , the comprehensive thermal energy utilization rate is only about 35%, and the energy waste is huge. At present, the cost of water, electricity and coal energy accounts for about 35% of the total cost of printing and dyeing enterprises.

A large number of printing and dyeing enterprises spend a huge amount of energy on energy consumption every year. Purchase coal and steam for desizing, scouring, rinsing, alkali steaming, pad dyeing, high temperature and high pressure overflow dyeing, jigging, printing steaming, drying, heat setting, continuous or regular sewage discharge from boilers in the production process, Three-effect or capacity expansion alkali recovery, water film dust removal and other processes.

How to revitalize the entire industry under the circumstances of the epidemic and major changes in domestic and foreign markets, waste heat recovery and recycling has become the only way for energy conservation, environmental protection and emission reduction in the textile printing and dyeing industry, and it is also the general trend.

Setting machine exhaust gas recovery

Working principle of exhaust gas recovery: The tail exhaust gas discharged from the drying oven of the setting machine exchanges heat with fresh air in the heat exchanger. The heat of the high-temperature exhaust gas is used to discharge the low-temperature exhaust gas.

Jiema undertook the waste gas reuse project of a printing and dyeing factory in Huayang Industrial Park: After the factory's setting machine is turned on, the working temperature of the oven reaches 200 °C, and the exhaust gas emission is 14,000 cubic meters per hour. Calculated and selected the high-temperature gas-gas heat exchanger, a patented product of Jiema, as the main equipment for waste heat recovery and utilization of waste gas, and guided the transformation of the original waste gas pipeline on site.

After the equipment is in operation and tested by the manufacturer, the flue of this setting machine is transformed, and the recovered heat is 280,000 kcal, which is 6.72 million kcal per day, which is equivalent to 11t steam. According to the steam cost of 100 RMB/t, the annual cost saving is about 400,000 RMB . The energy saving effect is remarkable.