废气喷淋塔是在可浮动填料层气体净化器的基础上改进而产生的，广泛应用于工业废气净化、除尘等方面的前处理，利用气体与液体间的接触，而将气体中的污染物传送到液体中，然后再将清洁气体与被污染的液体分离，达到清净空气的目的。废气经由填充式洗涤塔，采用气液逆向吸收方式处理，即液体自塔顶向下以雾状（或小液滴）喷撒而下。废气则由塔体（逆向流）达到气液接触之目的。此处理方可冷却废气、调理气体及去除颗粒，再经过除雾段处理后，排入大气中。

The waste gas spray tower is an improved version of the floating packing layer gas purifier, widely used in pre-treatment of industrial waste gas purification, dust removal, and other aspects. It utilizes the contact between gas and liquid to transfer pollutants from the gas to the liquid, and then separates the clean gas from the polluted liquid to achieve the goal of clean air. The exhaust gas is treated through a packed scrubbing tower using gas-liquid reverse absorption, where the liquid is sprayed down from the top of the tower in the form of mist (or small droplets). The exhaust gas achieves gas-liquid contact through the tower body (reverse flow). This treatment can cool the exhaust gas, regulate the gas, and remove particles. After passing through the defogging section, it is discharged into the atmosphere.

废气喷淋塔原理主要是根据臭气的成分利用强酸（硫酸）、强碱（氢氧化钠）、强氧化剂（次氯酸钠）作为洗涤喷淋溶液与气体中的臭气分子发生接触，使气相的臭味成分转移至液相，并借助化学药剂与臭味成分中和、氧化反应去除臭味物质。

The principle of the exhaust gas spray tower is mainly based on the composition of the odor, using strong acids (sulfuric acid), strong bases (sodium hydroxide), and strong oxidants (sodium hypochlorite) as washing spray solutions to come into contact with odor molecules in the gas, transferring the odor components from the gas phase to the liquid phase, and using chemical agents to neutralize and oxidize the odor components to remove the odor substances.

喷淋塔厂家设备性能特点常用的洗涤设备为填充塔，化学吸收液从塔顶往下喷淋，废气向上流，臭气与吸收液充分接触、反应从而被去除。吸收液与废气流量比例(液/气比)一般为1-3 L/m3，填料高度一般为2-5米,气体空塔流速一般为0.5-1米/秒。操作良好的填充塔，除臭效果可达到90%以上

The commonly used washing equipment for spray tower manufacturers is the filling tower, where the chemical absorption liquid is sprayed downwards from the top of the tower, and the exhaust gas flows upwards. The odor is fully contacted and reacted with the absorption liquid to be removed. The ratio of absorption liquid to exhaust gas flow rate (liquid/gas ratio) is generally 1-3 L/m3, the packing height is generally 2-5 meters, and the gas flow rate in the empty tower is generally 0.5-1 meters/second. A well operated filling tower can achieve a deodorization effect of over 90%

废气PP喷淋塔常用的化学吸收剂种类

Types of chemical absorbents commonly used in exhaust gas PP spray towers

碱性溶液：碱性吸收液常用含有1%~10%的氢氧化钠溶液，对消除硫化氢废气效果显著，其它如甲硫醇、硫化甲基、二硫化甲基、低级脂肪酸等经常在废水处理场造成臭味的物质，处理效果也很显著。

Alkaline solution: Alkaline absorption solution commonly contains 1% to 10% sodium hydroxide solution, which has a significant effect on eliminating hydrogen sulfide waste gas. Other substances that often cause odor in wastewater treatment plants, such as methyl mercaptan, methyl sulfide, methyl disulfide, and lower fatty acids, also have significant treatment effects.

酸性溶液：酸液洗涤主要用于消除由氨、三甲胺等碱性气体所致臭味，一般使用硫酸 (0.5%-5%的溶液)作为洗涤液。

Acidic solution: Acid washing is mainly used to eliminate odors caused by alkaline gases such as ammonia and trimethylamine. Generally, sulfuric acid (0.5% -5% solution) is used as the washing solution.

次氯酸钠溶液：次氯酸钠一般与酸碱性吸收液一起使用，对于其它方法很难消除的硫化甲基，使用次氯酸钠吸收液的控制效果甚佳。

Sodium hypochlorite solution: Sodium hypochlorite is generally used together with acidic and alkaline absorbent solutions. For sulfurized methyl groups that are difficult to eliminate by other methods, the use of sodium hypochlorite absorbent solutions has excellent control effects.

处理高浓度臭气时，次氯酸钠溶液浓度 (有效氯浓度) 约为500~2000 ppm；而处理较低浓度臭气时，使用次氯酸钠溶液浓度约50~500 ppm。以各项氧化剂的性能而言，次氯酸钠便宜，处理效果好，所以使用广泛。在溶液中的次氯酸钠以次氯酸 (HOCl)形式存在：

When dealing with high concentration odors, the concentration of sodium hypochlorite solution (effective chlorine concentration) is about 500-2000 ppm; When dealing with low concentration odors, sodium hypochlorite solution with a concentration of about 50-500 ppm is used. In terms of the performance of various oxidants, sodium hypochlorite is cheap and has good treatment effects, so it is widely used. Sodium hypochlorite in solution exists in the form of hypochlorous acid (HOCl):

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在pH=7.5，次氯酸盐溶液的有效氯以50% HOCI和次氯酸根离子(OCl-)存在；

At pH 7.5, the effective chlorine in the hypochlorite solution exists as 50% HOCI and hypochlorite ions (OCl -);

在pH=l0，只有0.3%有效氯以HOCl存在；

At pH=10, only 0.3% of available chlorine exists as HOCl;

或12，HOCl几乎完全解离成无用的次氯酸根离子，因此pH值控制很重。

Or 12, HOCl almost completely dissociates into useless hypochlorite ions, so pH control is very important.

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