Study On The Water Pinch In The Waste Water Network Of The Brew House

It is stringently urgent to deal with the difficulty of shortage of water resource in the economic construction in China.However it can never be ignored that the loss and waste have intensified the shortage of water resources.Beer industry is a big water consumer,even more;it is a big producer of wastewater.In China,the water consumption of processing one ton of beer is from 10 to 30 ton.And the discharge of wastewater of processing one ton of beer is from 10 to 20 ton.Comparing to the international average level,there is a great potential of saving water and reducing emitting pollutants in beer industry.The paper studies the optimization of utilizing water resource in a brewhouse,which has been proved to achieve fairly good economic profits and provided some experiences for saving water and reducing emitting pollutants in other brewhouses in this field.Firstly,the paper presents a survey on manipulation with water in the production facilities of the brewhouse,and then draws a plot of the water network of the main technical raw,which provides some basic data for the analysis of water usage.Secondly,it chooses some of the main operations in the beer manufacture to compose the simple water network,and describes how the amount of minimum fresh water can be obtained by using a density interval diagram and a density complex curve.It fringe apply the water pinch technology in the beer operation with water.And the amount of minimum fresh water can be obtained which passes the water pinch.It needs the fresh water dosage of 168.39 ton every hour,and saving water rate is 5.46% in Project One;the fresh water dosage of 158.92 ton every hour,and saving water rate is 10.78% in Project Two;the fresh water dosage of 149.45 ton every hour,and saving water rate is 16.10% in Project Three.It shows that the higher of the limiting density permitted by the operation of water consumption,the lower of recycling water is required,which means more water can be used again,therefore,better economic profits of saving water can be achieved.Thirdly,it applies the water pinch with the two methods of the water recycling and the recycling regeneration in the simple water network by the operation and two other operations which reclaim and utilize the second steamy in procession of seethe of the beer production.It needs the fresh water dosage of 123.42 ton every hour,and saving water rate is 8.11% in the method of the water recycling;64.96 ton every hour,and saving water rate is 64.96% in the method of the recycling regeneration.It shows the recycling regeneration can reduce the fresh water greatly.It is also an effective way of saving water and reducing drainage by recycling regenerated wastewater and providing high-quality water resources.And the other side,it also increases the cost of the beer production by the operation of wiping off the impurity.