Alkali recovery device for straw pulp papermaking black liquor

The present invention relates to alkali recovery from papermaking black liquor, and is especially improved alkali recovering apparatus. The alkali recovering apparatus has black liquor burning furnace connected via pipeline to concentrating tower to provide heat source. The black liquor burning furnace is provided with one dusting wall between the coal burning section and the black liquor burning section, and one black liquor thickening section with black liquor nozzle and black liquor flowing plate inside the black liquor combustor. The concentrating tower is provided with one gas-water separator, one water separating disc and dense black liquor nozzle. The present invention has greatly raised alkali recovering rate, no jamming, low cost and high running safety. 草浆造纸黑液碱回收装置涉及一种对造纸黑液碱回收，特别是草浆造纸黑液碱回收处理装置的改进。所述的装置中，黑液燃烧炉通过管道与浓缩塔连接并提供热源。在所述黑液燃烧炉中的燃煤段与黑液燃烧段之间设置了一个除尘拱墙；在所述黑液燃烧段的黑液燃烧室内设置了一个带有黑液喷头和黑液自流板的黑液增浓段。在所述浓缩塔的排烟口与自流孔板之间设置了一个气水分离器，自流孔板的下部设置有分水盘，所述分水盘与热风进口之间设置有浓黑液喷嘴。本发明可以大大提高草浆黑液的碱回收效率，运行中不会因发生硅堵等问题影响设备的正常运行。所需的投资额相当于背景技术的1/10-1/6，同时设备运行费用也相应大大降低，设备运行安全性好。