The utility model provides an odor-proof sealing device for centrifugal fans in garbage incineration power plants, which comprises a motor, a bearing box, a rotating shaft, an impeller, a impeller chamber, a base, an aspiration port and an exhaust port. The bearing box, an impeller chamber and an electric motor are installed and fixed on the base. The motor drives the impeller to rotate through a rotating shaft, and the air enters the impeller chamber from the aspiration port and then discharges from the exhaust The utility model is characterized in that a sealing sheath is arranged between the impeller chamber and the bearing box, one end of the sealing sheath is sealed and fixed with the impeller chamber and the other end is sealed and fixed with the bearing box shell, the sealing sheath is in a circular tubular structure and is sleeved outside the rotating shaft, and a rotating gap is arranged between the inner wall of the sealing sheath and the rotating shaft. In the process of centrifugal fan operation, because the impeller chamber and bearing box are fixed on the base, it is feasible to install a sealing sheath between the impeller chamber and bearing box, which will not affect the normal operation of the fan, and can effectively prevent odor leakage to the office area and ensure environmental hygiene.
【技术实现步骤摘要】
一种垃圾焚烧发电厂离心风机的防臭密封装置
本技术涉及垃圾焚烧发电厂一种垃圾焚烧发电厂的防臭装置,尤其是一种垃圾焚烧发电厂离心风机的防臭密封装置。
技术介绍
离心风机是根据动能转换为势能的原理,利用高速旋转的叶轮将气体加速,然后减速、改变流向,使动能转换成势能(压力)。在单级离心风机中,气体从轴向进入叶轮,气体流经叶轮时改变成径向,然后进入扩压器。在扩压器中,气体改变了流动方向并且管道断面面积增大使气流减速,这种减速作用将动能转换成压力能。压力增高主要发生在叶轮中,其次发生在扩压过程。在多级离心风机中,用回流器使气流进入下一叶轮,产生更高压力。离心风机在电厂运行离心风机广泛用于工厂、矿井、隧道、冷却塔、车辆、船舶和建筑物的通风、排尘和冷却;锅炉和工业炉窑的通风和引风。垃圾发电厂垃圾储存池运行中一般装满垃圾,从而将水滤干垃圾进行发酵,垃圾在发酵过程中产生大量沼气及热气,为确保厂区环境无臭味,生活垃圾焚烧发电厂垃圾储存池一般维持负压运行,为维持垃圾池负压,垃圾焚烧厂一般采用离心风机抽取垃圾池臭气,臭气通过空预器(蒸汽)加热后(200℃左右)利用风机送入焚烧炉炉排下面,做为垃圾燃烧需要的干燥风及助燃风。问题是,垃圾焚烧发电厂一次风一般通过离心风机抽取自垃圾池,再送入垃圾焚烧炉做为垃圾燃烧的助燃风。从而保证垃圾储存池负压,离心风机分为静止部分及转动部分,静止部分主要指风机基座,叶轮室,轴承箱,转动部分主要指叶轮、转动轴及轴承。为确保风机正常运行,转动轴和叶轮室之间必须设置间隙。正常情况下,风机高速运动旋转,整个叶轮室之间为正压运行,且叶轮内部是正压,这就造成叶轮室与 ...
【技术保护点】
1.一种垃圾焚烧发电厂离心风机的防臭密封装置,包括电机、轴承箱、转动轴、叶轮、叶轮室,基座、吸气口、排气口,所述轴承箱、叶轮室及电机安装固定在基座上,电机通过转动轴驱动叶轮转动,空气从吸气口进入叶轮室然后从排气口排出,其特征是,在所述叶轮室与所述轴承箱之间设置密封护套,所述密封护套一端与叶轮室密封固定而另一端与轴承箱壳体密封固定,所述密封护套呈圆管状结构并套接在转动轴外面,所述密封护套内壁与转动轴之间设置转动间隙。
【技术特征摘要】
1.一种垃圾焚烧发电厂离心风机的防臭密封装置,包括电机、轴承箱、转动轴、叶轮、叶轮室,基座、吸气口、排气口,所述轴承箱、叶轮室及电机安装固定在基座上,电机通过转动轴驱动叶轮转动,空气从吸气口进入叶轮室然后从排气口排出,其特征是,在所述叶轮室与所述轴承箱之间设置密封护套,所述密封护套一端与叶轮室密封固定而另一端与轴承箱壳体密封固定,所述密封护套呈圆管状结构并套接在转动轴外面,所述密封护套内壁与转动轴之间设置转动间隙。2.根据权利要求1所述的垃圾焚烧发电厂离心...
【专利技术属性】
技术研发人员:刘志强,何少敦,
申请(专利权)人:深圳市能源环保有限公司,
类型:新型
国别省市:广东,44
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