Recovery method and recovery equipment of distillation waste liquid latent heat of alcohol plant

Abstract

The invention provides a recovery method and equipment of distillation waste liquid latent heat of an alcohol plant. High-temperature waste liquid exhausted by the tower bottom of a rectifying tower is guided into a flash evaporation balancer, steam is generated by the self-evaporating effect of the high-temperature waste liquid, and the generated steam is used as heat energy of the process of aldehyde tower rectifying, crude wine preheating or fusel oil tower concentrating of the alcohol plant. According to the recovery method and the equipment of the distillation waste liquid latent heat of the alcohol plant, latent heat recovery rate of the alcohol plant can be improved, the steam can be saved by 1.5t / h, energy consumption of a production enterprise is lowered, and the purpose of energy saving and emission reduction is achieved.

Description

technical field [0001] The invention relates to a method and equipment for recovering latent heat of rectification waste liquid in an alcohol factory, belonging to the field of energy saving and emission reduction in alcohol factories. Background technique [0002] The production of alcohol by biological fermentation and the purification process of alcohol consume a lot of energy, and energy consumption accounts for about 80% of the production cost. How to reduce energy consumption, reduce production costs, and improve the competitiveness of enterprises is a problem faced by every alcohol factory. The emergence of differential pressure distillation technology has greatly reduced the cost of alcohol production enterprises. Some enterprises are satisfied with the status quo, satisfied with the temporary effect brought to them by differential pressure distillation technology. The waste liquid discharged from the differential pressure rectification tower is higher than 100°C. I...

AI Technical Summary

Problems solved by technology

The waste liquid discharged from the differential pressure rectification tower is higher than 100°C. If it is directly discharged into the river, it will damage the ecological environment. Therefore, many alcohol factories use cooling water to cool it to a certain temperature before discharging it into the river. This method will not only waste The latent heat contained in the high-temperature waste liquid will also waste a lot of cooling water, and the power consumption generated by the cooling process is not a small amount.

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