System and method for treating printing and dyeing sludge by using waste heat of setting waste gas from printing and dyeing mill

Abstract

The invention discloses a system and method for treating printing and dyeing sludge by using waste heat of setting waste gas. First to n setting machines are respectively connected with one end of a main exhaust pipeline through first to n branch exhaust pipelines; the other end of the main exhaust pipeline is connected with the upper end of a drying and granulating device; the upper part of the drying and granulating device is provided with a drying and granulating device feed port; a quantitative feeder is connected with the drying and granulating device feed port through a spiral conveyer; a drying and granulating device discharge port is arranged below the tail part of the drying and granulating device; sludge finished product storage is connected with the drying and granulating device discharge port through a conveyer; and the tail part of the drying and granulating device, a drying and granulating device air outlet, an electric gate valve, a multistage dedusting and degassing device, a draught fan, a pipeline and a chimney are connected in turn. According to the invention, printing and dyeing sludge is dried by using hot waste gas exhausted by the setting machines of a printing and dyeing mill, so that the printing and dyeing sludge is subjected to thorough harmless and recycling treatment under the condition of not consuming new energy, thus developing a new way of treating waste with waste and recycling waste for treatment of printing and dyeing sludge.

Description

technical field [0001] The invention relates to the field of sewage and sludge treatment, in particular to a system and method for treating printing and dyeing sludge by utilizing waste heat of sizing waste gas. Background technique [0002] In the entire technological process of the printing and dyeing factory, setting is the main process of finishing. Through the mechanical action of the setting machine and the anti-shrinkage, softening, and hardening effects of chemical reagents, the fabric can achieve a certain shrinkage, density, and hand feeling, and can achieve the appearance of uniform width, smooth lines, and clear lines. Under normal circumstances, the working temperature of the setting machine is about 140-200°C, the temperature of the exhaust gas is generally 120-180°C, and the total exhaust gas emission of a single setting machine is 15000-20000m3 / h. It is estimated that in the total energy consumption of the printing and dyeing factory's setting process, the h...

AI Technical Summary

Problems solved by technology

[0003] At present, heat exchangers are mainly used to recover the waste heat from the exhaust gas discharged from the setting machine in printing and dyeing factories at home and abroad. However, using the heat exchanger to recover the waste heat from the setting machine generally has high initial investment costs, low effective energy recovery rate, easy blockage of heat pipe fins and Technical problems such as oil staining, high operating costs and difficult maintenance and management

Images