沼氣進入沼氣發(fā)電機組之前需要預(yù)處理，由于糞便產(chǎn)生的沼氣除含有大量的甲烷和二氧化碳外，還含有其他如硫化氫、雜質(zhì)、水分、氮氧化合物、硅氧烷等組分。糞便厭氧發(fā)酵產(chǎn)生的沼氣中硫化氫含量大，會對后端的設(shè)備產(chǎn)生腐蝕作用，因此進行了沼氣脫硫的處理。
Before the biogas enters the biogas generator unit, it needs pretreatment. The biogas produced by feces contains not only a large amount of methane and carbon dioxide, but also other components such as hydrogen sulfide, impurities, water, nitrogen oxides, siloxane, etc. The biogas produced by anaerobic fermentation of feces contains a large amount of hydrogen sulfide, which will corrode the back-end equipment. Therefore, the biogas desulfurization process has been carried out.
未經(jīng)處理的沼氣不符合發(fā)動機氣體品質(zhì)的要求。沼氣直接進入發(fā)動機，可能會引起功率波動、機組敲缸、停機甚至爆炸。若氣體只是做了簡單的處理，水分、含塵量、壓力、溫度等均不符合機組要求。由于積水導致了凝結(jié)水在管道的大量聚集，機組的可用率和發(fā)電功率大幅度下降；含塵量過高導致壓力損耗過大，且機組內(nèi)部缸體損耗嚴重；壓力、溫度等不符合機組要求，機組頻繁跳機，可用率大幅下降且增加了維護檢修成本。而經(jīng)過改造后的氣體預(yù)處理，機組的發(fā)電量可以增加70%。所以，氣體品質(zhì)處理的效果如何，直接影響到終的機組工作效率，從而影響收益。所以選用好的預(yù)處理設(shè)備進行氣體的除濕、除雜、穩(wěn)壓、恒溫等等工作是保證效益的前提。
The untreated biogas does not meet the requirements of engine gas quality. The biogas directly enters the engine, which may cause power fluctuation, cylinder knock, shutdown and even explosion of the unit. If the gas is simply treated, the moisture, dust content, pressure and temperature do not meet the requirements of the unit. The accumulated water has led to a large amount of condensate gathering in the pipeline, and the availability and power generation of the unit have decreased significantly; The excessive dust content leads to excessive pressure loss, and the internal cylinder block of the unit is seriously damaged; The pressure and temperature do not meet the requirements of the unit, the unit trips frequently, the availability rate decreases significantly and the maintenance and overhaul cost increases. After the gas pretreatment after transformation, the generating capacity of the unit can be increased by 70%. Therefore, the effect of gas quality treatment directly affects the working efficiency of the final unit, thus affecting the income. Therefore, selecting good pretreatment equipment for gas dehumidification, impurity removal, voltage stabilization, constant temperature and other work is the premise to ensure benefits.
沼氣發(fā)電機組對使用環(huán)境及沼氣的基本要求：
Basic requirements for the use environment and biogas of biogas generator set:
1.燃氣進氣壓力為2-10kpa,發(fā)電機組的氣體壓力過高或過低則需加調(diào)壓閥或增壓設(shè)備；
1. The gas inlet pressure is 2-10kpa. If the gas pressure of the generator set is too high or too low, a pressure regulating valve or supercharging equipment shall be added;
2.燃氣中不含游離水和大于5μm的游離物質(zhì)，燃氣中硫化氫含量需低于10ppm；
2. The fuel gas contains no free water and more than 5 μ M, and the hydrogen sulfide content in the gas shall be lower than 10ppm;
3.機組一般使用環(huán)境：溫度5℃~35℃，海拔高度≤500m；
3. General operating environment of the unit: temperature 5 ℃~35 ℃, altitude ≤ 500m;
備注：燃氣中硫化氫含量過高時，對燃氣機組零部件會造成一定的腐蝕，影響機組正常使用及機組使用壽命。
Remarks: When the hydrogen sulfide content in the gas is too high, it will cause certain corrosion to the components of the gas turbine unit, affecting the normal use and service life of the unit.
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2022-11-28
