The process of reusing spent lees from distillation in cooling towers.

Abstract

This invention relates to the process of reusing spent lees from distillation in cooling towers. (Cooling tower) To solve the problem of needing to reduce wastewater volume (Spent Lees). The process involves two steps: 1. Wastewater (spent lees) is generated from sending the fermented liquid containing alcohol to the first distillation column, which will... The function of separating alcohol from the wastewater is to send the alcohol to the rectifier (1) to increase its purity. The alcohol is converted into ethanol, and the remaining waste (Spent Lees) (2) is separated out at the bottom of the tower. This water will be sent to the factory's wastewater holding pond and treated by sending it to a biogas digester (Step 2). Produce softener water by turning on softener water (5) into the cooling tower (4) at a usage ratio of 75% where Step 3: Mix 25% of the spent water from the distillation process with the softener at a specific ratio. 75% is sent for use in the cooling tower. Step 4 involves adding chemicals, reducing the concentration of chlorine solution from 10% to 65%. The original process, then perform water quality analysis in the cooling tower (4) and step 5 drainage. (Blowdown) After measuring the concentrations of conductivity, turbidity, and chloride. Exceeding the control limit. Furthermore, this invention has the advantage of extending the water usage time from 4.5 times to 5 times, and the quantity... The water discharged from the cooling tower is reduced to 95% before being released into the factory's wastewater holding pond.

Claims

1. The process of reusing spent lees from distillation in the cooling tower is as follows: Step 1. The water production system produces softener water (5) and feeds it into the cooling tower (4). Which has the following special characteristics: Step 2 Take the waste water (Spent lees) (2) that comes out from the bottom of the distillation tower (Rectifier) ​​(1) into the cooling tower (Cooling). tower) (4) by mixing with bile (Softener) (5) at the ratio of wastewater (Spent lees) : bile (Softener) percent 25:75 by volume Step 3: Add chemicals, reducing the concentration of 10% liquid chlorine to 65% from the original process, and then proceed. Analysis of water quality in cooling tower (4) Step 4 In the case where the water quality analysis in the cooling tower (4) is performed and it is found that the conductivity value If conductivity, turbidity, and chloride levels exceed the control limits, venting is required. (Blowdown) Some of the water in the system is equivalent to 95% going into the factory's wastewater holding pond (3).

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