典型有機(jī)廢棄物厭氧發(fā)酵產(chǎn)項(xiàng)目，沼氣發(fā)電工藝流程，厭氧發(fā)酵產(chǎn)出沼氣之后，行凈化和儲存，再進(jìn)入沼氣發(fā)電系統(tǒng)產(chǎn)生電能，同時(shí)回收余熱返回預(yù)處理系統(tǒng)和厭氧發(fā)酵系統(tǒng)。如果余熱不夠，還需要配套沼氣鍋爐進(jìn)行產(chǎn)熱（即使余熱夠用，一般鍋爐也都是要上的，用于調(diào)試期間及發(fā)電機(jī)檢修期間供熱）。同時(shí)還應(yīng)設(shè)置應(yīng)急火炬，用于沼氣凈化系統(tǒng)或者沼氣利用系統(tǒng)故障時(shí)，沼氣的應(yīng)急處理。
A typical organic waste anaerobic fermentation production project involves a biogas power generation process. After biogas is produced through anaerobic fermentation, it is purified and stored before entering the biogas power generation system to generate electricity. At the same time, the residual heat is recovered and returned to the pretreatment system and anaerobic fermentation system. If the waste heat is insufficient, it is also necessary to provide a biogas boiler for heat generation (even if the waste heat is sufficient, generally, the boiler is required for heating during commissioning and generator maintenance). At the same time, emergency flares should also be installed for emergency treatment of biogas when the biogas purification system or biogas utilization system fails.
沼氣發(fā)電技術(shù)較為成熟，發(fā)電機(jī)組有進(jìn)口的，也有國產(chǎn)的。國產(chǎn)機(jī)組相對投資較低，但是發(fā)電效率也較低（進(jìn)口發(fā)電機(jī)發(fā)電效率35%~40%，國產(chǎn)發(fā)電機(jī)組發(fā)電效率25%~35%）。如果發(fā)電量較大，電能可成為項(xiàng)目主要收益來源，建議選擇進(jìn)口發(fā)電機(jī)組。如果項(xiàng)目投資緊張，且發(fā)電量較小，可以選擇國產(chǎn)發(fā)電機(jī)組。

The biogas power generation technology is relatively mature, with both imported and domestic power generation units. Domestic units have relatively low investment, but their power generation efficiency is also low (35% - 40% for imported generators, 25% - 35% for domestic generators). If the power generation capacity is large, electric energy can become the main source of income for the project. It is recommended to choose imported power generation units. If the project investment is tight and the power generation capacity is small, domestic power generation units can be selected.
沼氣發(fā)電系統(tǒng)主要由沼氣發(fā)電機(jī)組、余熱回收裝置、煙氣凈化裝置組成。發(fā)電機(jī)以沼氣為燃料，一部分熱能轉(zhuǎn)化成電能輸出，可以用于項(xiàng)目自身或并入電網(wǎng)。還有一部分熱能，會通過發(fā)動機(jī)機(jī)體和煙氣散發(fā)出來（約為總熱量的50%~60%），因此可對這部分熱能進(jìn)行回收?；厥盏臒崃靠捎糜谇岸斯に嚕A(yù)處理加熱和厭氧罐保溫），如果熱量不夠，可通過沼氣鍋爐進(jìn)行補(bǔ)充。發(fā)電機(jī)組產(chǎn)生的煙氣回收完熱量之后，進(jìn)入煙氣凈化系統(tǒng)，去除煙氣中的氮氧化合物，凈化后的煙氣進(jìn)行高空排放。
The biogas power generation system is mainly composed of biogas power generation units, waste heat recovery devices, and flue gas purification devices. The generator uses biogas as fuel, and part of the thermal energy is converted into electrical energy for output, which can be used for the project itself or integrated into the power grid. There is also a portion of thermal energy that is emitted through the engine body and smoke (approximately 50% to 60% of the total heat), so this portion of thermal energy can be recovered. The recovered heat can be used for front-end processes (pre-treatment heating and anaerobic tank insulation), and if the heat is insufficient, it can be supplemented by biogas boilers. After the heat is recovered from the flue gas generated by the generator unit, it enters the flue gas purification system to remove nitrogen oxides from the flue gas, and the purified flue gas is discharged at high altitude.