Waste heat recovery and hot air type energy-saving drying control system

Abstract

The invention discloses a waste heat recovery and hot air type energy-saving drying control system. The waste heat recovery and hot air type energy-saving drying control system comprises a drying oven exhaust fan (12), an exhaust air valve (21), an axial flow fan (19), a compressor (2), a heat exchanger A (1), a heat exchanger C (3) and a computer control center (14); the heat exchanger A (1) absorbs the heat energy (10) of harmful waste gas (16) exhausted by an air outlet (15) of a drying oven (11), and the heat energy (10) and the heat Z (23) generated by the compressor (2) act on the heat exchanger C (3) and then are conveyed into an air inlet (6) of the drying oven (11). According to the system, the basic heat is provided according to the Carnot principle, the COP is higher than 3.0, the heat recovered from the harmful waste gas is accumulated, the heating efficiency is greatly improved, and the energy is saved; according to the technological conditions of photogravure presses, compound machines and coating machines, the speed of an air inlet fan, the speed of the exhaust fan, the speed of the compressor for heat exchange and the angle of the exhaust air valve are adjusted in a stepless speed adjsutment mode for reducing unnecessary loss of hot air, and the harmful gas is compressed for preparing for harmful gas recovery in the second step.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a waste heat recovery and hot air energy-saving drying control system. Background technique [0002] Gravure printing machine is used for printing paper and film. It is widely used in daily packaging, food, and pharmaceutical packaging. It is generally printed in 4 to 14 colors. The printed ink is diluted with organic solvents, such as ethanol, toluene, acetone, etc. The drying temperature is between 40°C and 80°C. Commonly used drying methods are steam, natural gas, electric heating, etc. to heat the air so that it can be dried in the drying box of the printing press. The drying speed is generally 100 meters to 400 meters per minute. Commonly used traditional methods are very wasteful of energy. First of all, the steam loss is large, leaking, leaking, high insulation requirements, easy to drip, rust, and blockage. It belongs to secondary heating, low COP, and natural gas pipelines are expensi...

AI Technical Summary

Problems solved by technology

Commonly used traditional methods are very wasteful of energy. First of all, the steam loss is large, leaking, leaking, high insulation requirements, easy to drip, rust, and blockage. It belongs to secondary heating, low COP, and natural gas pipelines are expensive and expensive. Electric heating, low COP, easy short circuit and fire hazard

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