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[目的]研究以过磷酸钙为填料的吸附塔对间歇通风条件下挥发氨气的吸附效果。[方法]以过磷酸钙填料的吸附塔为试验装置,吸收塔主体以一定高径比的PVC圆管构建,首先以氨水为氨气挥发源,研究了相同过磷酸钙装填量时,吸附塔高径比对氨气吸附效果的影响,进而选定高径比为9.9的吸附塔,对经过碳氮比调整的猪粪和鸡粪堆体,选择通风静堆条件进行了废气吸附试验。[结果]在一定的挥发速度下,吸附塔中的过磷酸钙颗粒可有效地吸附气流中的氨气,吸附效果随吸附塔高径比增加而增大,高径比在1.1以上时,吸附效果均可达到90%以上;使用高径比9.9吸附塔,占堆体重量8%左右的过磷酸钙装填量基本上能完全吸附猪粪、鸡粪堆肥过程中释放出的氨气。[结论]该研究结果为过磷酸钙吸附塔在堆肥废气处理中的应用提供了参考依据。
[Objective] The research aimed to study the adsorption effect of ammonia superphosphate on intermittent aeration with superphosphate as filler. [Method] With the adsorbent tower of superphosphate as filler, the main body of the absorption tower was constructed with PVC pipe with a certain height-diameter ratio. At first ammonia water was used as the ammonia volatilization source. When the same superphosphate loading was used, the adsorption tower Height-diameter ratio of ammonia adsorption effect, and then select the height-diameter ratio of 9.9 adsorption tower, after the carbon and nitrogen ratio adjusted pig manure and chicken manure body, choose the conditions of the exhaust ventilation exhaust adsorption test. [Result] Under a certain volatilization rate, the superphosphate particles in the adsorption tower could effectively adsorb the ammonia in the gas stream. The adsorption efficiency increased with the increase of the aspect ratio of the adsorption tower. When the height-diameter ratio was above 1.1, the adsorption The effect can reach more than 90%; using height-diameter ratio of 9.9 adsorption tower, accounting for 8% of the weight of the body weight of superphosphate loading can basically completely absorb the release of ammonia during the composting of pig manure, chicken manure. [Conclusion] The results of this study provided a reference for the application of SSP adsorption tower in the treatment of compost waste gas.