Non-air return, condensing water flash vaporization and sensitive heat and air exhaust waste heat recovery laxation thermoforming machine

Abstract

The invention relates to a non-air return, condensing water flash vaporization and sensitive heat and air exhaust waste heat recovery laxation thermoforming machine. The thermoforming machine is characterized in that the inlet of a high pressure heat exchanger is connected with a gas supplying main pipe, the outlet of the high pressure heat exchanger is switched in a medium voltage flash tank through a high pressure trap, and the top of the medium voltage flash tank is provided with a medium voltage constant voltage overflow valve; the outlet of the medium voltage constant voltage overflow valve is switched in the inlet of the medium voltage heat exchanger through a flash vaporization gas pipe, the outlet of the medium voltage heat exchanger is switched in a low pressure flash tank through a medium voltage draining valve, and the top of the low pressure flash tank is provided with a low pressure constant voltage overflow valve; the outlet of the low pressure constant voltage overflow valve is switched in a low pressure heat exchanger through a low pressure flash vaporization gas pipe, the outlet of the low pressure heat exchanger is switched in a condensate pump through a low pressure draining valve, and the outlet of the condensate pump is switched in a fresh air preheater; and a preheating air outlet of the fresh air preheater is switched in an air supplying port of a laxation thermoforming machine, and the laxation thermoforming machine is switched in the fresh air preheater so as to indirectly carry out heat exchange with fresh air. The thermoforming machine provided by the invention can realize the full utilization of the air exhaust and condensing water waste heat, and the heat efficiency is high.

Description

technical field [0001] The invention relates to a relaxation heat setting machine, in particular to a relaxation heat setting machine with no return air, flash evaporation of condensed water, recovery of sensible heat and exhaust waste heat. Background technique [0002] The post-treatment of polyester staple fiber often uses a relaxation heat setting machine. The inner chamber of the relaxation heat setting machine is equipped with a fan, a heat exchanger and a drying room for drying the product. The air outlets are connected, and the air outlet of the fan is aligned with the heat exchanger above. Outside the body, a manual control valve is installed on the exhaust pipe, and the air return port is also connected with the suction port of the fan. The fresh air entering the box from the supplementary air inlet is mixed with the return air, and then blown to the heat exchanger by the fan. The heat exchanger heats it into hot air, and the hot air enters the drying chamber to s...

AI Technical Summary

Problems solved by technology

[0003] The shortcomings of this relaxation heat setting machine are: (1) According to different products, there are three levels of steam pressure, but only one steam trap is installed, and the steam trap can only work normally under a certain pressure. , cannot maintain the pressure difference required for normal work, either the displacement is not enough, or the steam leakage is serious

(2) The waste heat of the condensed water discharged by the steam trap needs to be utilized by external users. When there is no suitable user, it will inevitably be emptied and wasted

(3) Pollutants carried by the return air are easily deposited on the heat exchanger, deteriorating the heat exchange efficiency

(4) Even if the waste heat of condensed water is used by flash evaporation, the temperature of the discharged condensed water is still 130°C to 150°C, and the loss of waste heat is large

(5) The waste heat of the high-temperature exhaust air is not utilized, the exhaust air volume is manually controlled, and the discharge volume is highly random

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