湿法脱硫反应原理

　　Principle of wet desulfurization reaction

　　湿法脱硫塔主体包括洗涤塔、硫化氢采样与监测系统、碱液配置槽、供水软水装置、液位控制系统、支撑件和连接件。脱硫系统通过对出气硫化氢浓度的监控以及PH值监控，实现全自动运行。运行时，沼气由下至上通过脱硫塔，Wa2C03溶液(或Ha0H溶液)从顶部向下喷淋，使得H2S气体与碱液发生了充分的化学反应。

　　The main body of the wet desulfurization tower includes a washing tower, a hydrogen sulfide sampling and monitoring system, an alkali solution preparation tank, a water supply soft water device, a liquid level control system, supporting components, and connecting components. The desulfurization system achieves fully automatic operation by monitoring the concentration of hydrogen sulfide in the exhaust gas and pH value. During operation, biogas passes through the desulfurization tower from bottom to top, and Wa2C03 solution (or Ha0H solution) is sprayed downwards from the top, causing sufficient chemical reaction between H2S gas and alkali solution.

　　由于沼气中含有的大量C02成分，同样会消耗碱液。系统应能对反应条件(包括反应温度、PH值)等进行控制，设置合适反应条件，尽可能地减少碱液的消耗里。湿法催化脱硫一般采用酞菁钴磺酸盐系有机高分子化合物做为催化剂，反应原理如下:酞菁钴磺酸盐系有机高分子化合物，它是以多种金属离子为中心的配位化合物，与其它液相催化氧化法脱硫的本质区别是脱硫和氧化再生两个过程均有催化作用，它将一般液相催化氧化的再生过程的控制步骤，改变为脱硫过程为全过程的控制步骤。

　　Due to the large amount of CO2 component contained in biogas, it also consumes alkaline solution. The system should be able to control the reaction conditions (including reaction temperature, pH value), set appropriate reaction conditions, and minimize the consumption of alkali solution as much as possible. Wet catalytic desulfurization generally uses phthalocyanine cobalt sulfonate organic polymer compounds as catalysts. The reaction principle is as follows: phthalocyanine cobalt sulfonate organic polymer compounds are coordination compounds centered on multiple metal ions. The essential difference from other liquid-phase catalytic oxidation desulfurization methods is that both desulfurization and oxidation regeneration processes have catalytic effects. It changes the control step of the regeneration process of general liquid-phase catalytic oxidation to the control step of the entire desulfurization process.

　　无机硫的化学吸收与催化转化

　　Chemical absorption and catalytic conversion of inorganic sulfur

　　H,S + a2C0:= NaHS + NaHCO:2NaHS +NaHC0:+(X-1)S=NaSX +CO:+ HO

　　H,S + a2C0:= NaHS + NaHCO:2NaHS +NaHC0:+(X-1)S=NaSX +CO:+ HO

　　NaHS + H? = aOH + H,S

　　NaHS + H? =  aOH + H,S

　　33)

　　33)

　　a,SX + H20 = aOH + H,SX(4)

　　a,SX + H20 = aOH + H,SX(4)

　　反应(2)是酞菁钴磺酸盐法的反应，所谓催化化学吸收，就是指此反应。对有机硫的脱除反应

　　Reaction (2) is a reaction of cobalt phthalocyanine sulfonate method, and the so-called catalytic chemical absorption refers to this reaction. Removal reaction of organic sulfur

　　RSH + HaCO:= RSa + HaSCO.(5)C0S+2aC0:+H,0=NaCO,S + 2NaHCO:(的)CS:+NaC0:+H0=2NaHCO3

　　RSH+HaCO:=RSa+HaSCO. (5) C0S+2AC0:+H, 0=NaCO, S+2NaHCO: (of) CS:+NaC0:+H0=2NaHCO3

　　硫化物的催化氧化(再生)

　　Catalytic oxidation (regeneration) of sulfides

　　IagS +1/20,+H0=aOH + S+(8)

　　IagS +1/20,+H0=aOH + S+(8)

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