氣浮的分類和適用范圍

⑴分類：

①電解氣浮法：運行時借助電極解作用，在兩個電極區(qū)不斷產(chǎn)生氫、氧和氯氣等微氣泡，廢水中的懸浮顆粒黏附于氣泡上上浮到水面而被去除。工藝簡單，設備小，但電耗大。

②散氣氣浮法：是空氣通過微細孔擴散裝置或微孔管或葉輪后，以微小氣泡的形式分布在污水中進行氣浮處理的過程。

優(yōu)點：簡單易行。

缺點：氣泡較大，氣浮效果不好。

③溶氣氣浮法：

包括加壓溶氣氣浮和溶氣真空氣浮，加壓溶氣氣浮是空氣在加壓條件下溶于水中，而在常壓下析出。（國內(nèi)外較常用）

溶氣真空氣浮是空氣在常壓或加壓條件下溶于水中，在負壓條件下析出。

⑵（氣浮法）適用范圍：

①分離懸浮油和乳化油

②可代替活性污泥法的二沉池對曝氣池出流混合液進行固液分離

③可分離工業(yè)廢水中的有用物質（如紙漿）

④可分離以分子或離子狀態(tài)存在的物質（如金屬離子、表面活性物質等）

3.加壓溶氣氣浮法

⑴系統(tǒng)組成：包括溶氣系統(tǒng)、空氣釋放裝置、氣浮設備池

⑵工藝流程分類：

①全溶氣流程②部分溶氣流程③回流加壓溶氣流程

⑶溶氣方式：

水泵吸水管吸氣溶氣方式、水泵壓水管射流溶氣方式和水泵-空氣壓縮機組合溶氣方式

⑷加壓溶氣氣浮的優(yōu)點：

①加壓情況下，水中空氣溶解度大，能提供足夠的溶氣量，以滿足不同的氣浮要求；

②突然減壓釋放產(chǎn)生的氣泡直徑小（20～100 ），粒徑均勻，微氣泡上浮穩(wěn)定，對液體的擾動小，特別適用于松散絮體和細小顆粒的固液分離；

③流程簡單，維護管理方便。

⑸氣浮池形式：

①平流式氣浮池：

被處理的廢水由池一端的下部進入接觸區(qū)，微氣泡與廢水進行均勻混合，使其中的懸浮顆粒黏附于氣泡上，廢水經(jīng)隔板進入氣浮分離區(qū)進行分離后，水中污染物隨氣泡一起上浮到水面上，經(jīng)刮渣設備刮除。

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 The classification of air flotation and the applicable scope

(1) classification:

Japanese float: (1) electricity run time with the aid of electrode solution, in two electrode area continuously produce the micro bubbles, such as hydrogen, oxygen and chlorine in the wastewater suspended particles adhere on the bubbles rise to the surface and be removed. With simple technology and equipment, but the power consumption.

(2) the spread of gas gas float: is the air through the tiny pore diffusion device or microporous tube or after impeller, in the form of tiny bubbles distribution gas floating in the water treatment process.

Advantages: simple and feasible.

Disadvantages: large bubbles, air flotation effect is not good.

(3) gas dissolved air flotation:

Including pressurized dissolved air flotation and dissolved air air float, pressurized dissolved air flotation is under the condition of pressurized soluble in water, air and precipitation under atmospheric pressure. (more commonly used at home and abroad)

Dissolved air air float is under the condition of normal pressure or pressurizing air dissolve in the water, precipitation under the negative pressure condition.

2 (air float) scope of application:

(1) the separation of suspended oil and emulsified oil

(2) it can replace the second pond activated sludge process of aeration tank discharge mixture for solid-liquid separation

(3) to isolate useful substances in industrial wastewater (such as pulp)

(4) can be separated to exist molecules or ions in a material (such as metal ions, such as surface active substance)

3. The pressurized dissolved air flotation

(1) system: including dissolved air system, air release device, gas pool

2 process classification:

(1) all dissolved air flow (2) part of the dissolved air flow (3) backflow pressurized dissolved air flow

(3) dissolved air way:

Breathe in water pump suction pipe dissolved air way, water jet pump pressure pipe dissolved air way and the way of dissolved air pump, air compressor combination

(4) pressurized dissolved air flotation of advantages:

(1) pressure, air solubility in water, can provide enough dissolved gas, in order to meet different gas float requirements;

(2) all of a sudden stress release of small air bubble diameter (20 ~ 100), particle size uniform, microbubble floatation stability, small disturbance to the liquid, especially suitable for loose flocs and tiny particles of solid liquid separation;

(3) the process is simple, easy to maintenance and management.

5] air flotation pool form:

1) flat flow gas float pool:

Treated waste water from the bottom of the pool side into the contact area, micro air bubble mixing with water, make the suspended particles adhesion on the bubble, waste water, after separation through partition into air flotation separation zone, with bubbles rise to the surface of the water, the water pollutants by scraping the slag shave their equipment.