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            污水廠不停產不排水的改造

            作者:     發布時間:2020年4月13日     閱讀量:1608次

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             Plant retrofits with no production suspension or draining of basinCauses of production suspens

             Plant retrofits with no production suspension or draining of basin

            Causes of production suspension or draining of basin

            There are two types of traditional aeration equipments. One is surface aeration device and the other is bottom aeration device.

            In bottom aeration system, the blower conveys the compressed air through the diffuser. It requires high power consumption to overcome the resistance of tiny holes on the diffusers in order to disperse the air to the liquid. The bubbles float vertically upward to the liquid surface and escape quickly before effective dispersion occurs. There are many shortcomings for bottom aeration systems, such as high energy consumption, high noise level, recurrent clogging, poor controllability and difficult replacement of quick-wear parts.

            The surface aeration system has the following weak points. The aeration depth is shallow. The bottom of basin has low dissolved oxygen level and sludge accumulation. The aeration direction is not adjustable, which is easy to cause dead zones in basins. The air intake is sufficient yet the bubbles exist only in the upper part of the basin. The rotors splash the water and spray aerosols, resulting in air pollution in the surrounding environment.

            The surface aeration devices introduced to China are suitable for basins or ditches which is less in 3 meters deep. However, the depth of most oxidation ditches ever built in China is 4 to 5 meters. This is the main reason of sludge accumulation and lack of DO in bottom of basin.

            Low efficiency and high energy consumption become the disadvantages of bottom and surface aeration devices and form the bottleneck for the reduction of wastewater treatment costs. Moreover, some aeration equipment must be replaced after production suspension of the plant. These problems shall bring great stress to the retrofit and update of small and medium-sized WWTP. The operation suspension shall cause ecological disaster to the environment and bring huge economic losses to the plant owners.

            污水廠不停產不排水的改造

            污水廠需要停產排水改造的原因:

            全球通用的傳統曝氣設備有兩大類:分別為表層曝氣類和底層曝氣類。

            對于底曝類設備,鼓風機的壓縮空氣經過池底的曝氣頭,需要高耗電以克服曝氣頭的阻力擴散至水體中,而且空氣進入水體后形成氣泡迅速垂直上升至水面并在有效擴散之前就逃逸出水面。能耗高、噪音大、易堵塞、易損件多、更換難、可控性差是難以解決的缺點。

            表曝類設備存在下列問題。曝氣深度淺、池底沉泥缺氧、曝氣方向不易調整,容易產生池底沉泥死區,進氣量不少、但氣泡僅存在池表面、揚起的污水拋到空氣中,散發出含有臭味的微小氣溶膠顆粒,造成局部空氣污染。我國引進的表曝類曝氣設備在歐美等國僅用于小于3米深的曝氣池中,而我國已建成的多座氧化溝曝氣池深均超過4-5米以上,這是造成池底沉泥缺氧的主要原因。因此,現有表曝類曝氣機的有關參數會大打折扣。

            上述兩大類曝氣設備均存在不同程度的動力效率低、耗能高的弊端,是當前污水處理成本難以降低的主要瓶頸。更有部分曝氣設備必須在停產后才能更換,給大中型污水處理廠的曝氣設備更新及提標改造形成極大困擾,大中型污水處理廠的停產將會造成嚴重的環境災害和生態破壞,同時也給工廠帶來巨大的經濟損失。

            Solution:

            The submersible floating aerator is a new aeration device, which has unique functions to replace and update current various aerators without draining of basins, sludge discharge or operation suspension. Besides, it also has special functions such as clean-up of accumulated sludge and physical elimination of foam. The introduction of this product makes the combination of deep water aeration, mixing and push-flow come true.

            解決方案:

            潛浮式曝氣機就是一種在不用停產、不用排泥、不影響出水的前提下能夠快速完成目前各種不同類型曝氣設備更新、部分更新、替換、部分替換等一系列操作的功能獨特的新型曝氣設備,同時該機還有輔助排泥、清理池底陳泥、物理消泡等特別功能。該產品的推出使得深水曝氣、攪拌、推流一步完成不再是夢想。

            回轉潛浮推流攪拌機.jpg


            下一條:曝氣池水面積存泡沫的成因和解決方法上一條:頂部加蓋的曝氣池有效曝氣的方式

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