造气污水净化回用及污泥干化处理工程实例

Project example of gas-making purification and reuse and sludge drying

介绍了某大型合成氨厂造气污水水质特点。采用平流沉降／干化池-一体化净水器及真空抽滤污泥干化工艺对其进行处理。结果表明：净水器单台处理能力大于1000m3／h；造气污水进水渠进水SS的质量浓度为164。418mg／L，pH值为7．41～8．08，温度为38～43℃时，清水池出水浊度为13．26—23．60mg／L，pH值为7．67～8．44，温度为27—31℃，达到进口温度≤55℃，出口温度≤32℃，浊度合格率100％的要求，出水水质稳定达到循环冷却系统补充水的要求。污泥干化后的含水率达到70％。

In view of the characteristics of the sewage from the gas-making process of a large scale synthetic ammonia plant, advection sedimentation/drying pool-integrated water purifier-vacuum filtration sludge drying process was adopted for its treatment. The results showed that, when the single processing capacity of the water purifier was above 1 000 mVh, the mass concentration of SS of the influent gas making sewage was 164 - 418 mg/L, the pH value was 7.41 - 8.08, the temperature was 38 - 43 ℃, the effluent turbidity from clean water tank was 13.26 - 23.60 mg/L, the pH value was 7.67 - 8.44, the temperature was 27 - 31 ℃, the inlet and outlet wa- dryed sludge reached 70%.