Principle of dry desulfurization

干法脱除沼气气体中硫化氢的设备基本原理是以O2使H2S氧化成硫或硫氧化物一种方法，也可称为干式氧化法。另一种方法为专用氧化铁(即MT专用氧化铁脱硫剂)吸收法，即以专用氧化铁脱硫剂中活*三氧人二铁，吸收气体中硫化氢，使其转化为硫化铁，从而脱除硫化氢的方法(目前多采用此法)。干法设备的构成是，在一个罐体内放入填料，填料层可为氧化铁脱硫剂、活炭脱硫剂等，是用氧化铁脱硫剂，因此脱硫剂硫容大，费用低比较实用。气体以低流速从一端经过罐体内填料层，硫化氢氧化成硫或硫氧化物或被转化为硫化铁后，余留在填料层中，净化后气体从容器另一端排出。

The basic principle of the equipment for removing hydrogen sulfide from biogas gas by dry method is to oxidize H2S into sulfur or sulfur oxide with O2, which can also be called dry oxidation method. The other method is the special iron oxide (i.e. MT special iron oxide desulfurizer) absorption method, that is, the method of removing hydrogen sulfide by absorbing hydrogen sulfide in the gas and converting it into iron sulfide with the live * trioxide iron in the special iron oxide desulfurizer (this method is mostly used at present). The composition of dry process equipment is to put filler in a tank. The filler layer can be iron oxide desulfurizer, live carbon desulfurizer, etc. it is iron oxide desulfurizer. Therefore, the desulfurizer has large sulfur capacity, low cost and is more practical. The gas passes through the filler layer in the tank at a low flow rate from one end. After hydrogen sulfide is oxidized into sulfur or sulfur oxide or converted into iron sulfide, it remains in the filler layer, and the purified gas is discharged from the other end of the container.

干法烟气脱硫是指喷入炉膛的CaCO3高温煅烧分成CaO，与烟气中的SO2发生反应，生成硫酸钙；采用电子束照射或活炭吸附使SO2转化生成硫酸氨或硫酸。

Dry flue gas desulfurization refers to the high-temperature calcination of CaCO3 injected into the furnace into Cao, which reacts with SO2 in the flue gas to produce calcium sulfate; SO2 is transformed into ammonia sulfate or sulfuric acid by electron beam irradiation or activated carbon adsorption.

干法烟气脱硫工艺流程：沼气→脱水→脱硫→阻火→发电或锅炉燃烧

Dry flue gas desulfurization process: biogas → dehydration → desulfurization → fire resistance → power generation or boiler combustion

干法脱硫特点

Characteristics of dry desulfurization

(1)结构简单，使用方便;

(1) Simple structure and convenient use;

(2)工作过程中无需人员值守，定期换料，一用一备，交替运行;

(2) There is no need for personnel to be on duty during the working process, and the fuel is changed regularly, one for use and one for standby, and the operation is alternating;

(3)脱硫率新原料时较高，后期有所降低;

(3) The desulfurization rate is higher for new raw materials and lower in the later stage;

(4)与湿式相比，需要定期换料;

(4) Compared with wet, regular refueling is required;

(5)运行费用偏高;

(5) High operating costs;

(6)适用于处理量较小，脱硫精度要求高的气体。

(6) It is suitable for gases with small processing capacity and high desulfurization accuracy.

干法脱硫设备用途

Application of dry desulfurization equipment

用户进口硫化氢含量，每小时处理量以及用户要求使用的周期等专门设计量身定做脱硫罐(或脱硫塔)、气水分离器、阻火器、鼓风机、稳压罐、脱硫剂装置、水封、压力表、流量表及配套管道阀门等。

The content of hydrogen sulfide imported by the user, the processing capacity per hour and the service cycle required by the user are specially designed and customized, such as desulfurization tank (or desulfurization tower), gas-water separator, flame arrester, blower, pressure stabilizing tank, desulfurizer device, water seal, pressure gauge, flow meter and supporting pipeline valves.

干法脱硫设备可用在沼气、养殖、淀粉、造纸、污水处理、酒精、化纤、制药、化肥、焦化、填埋、煤气、陶瓷、食品、玉米深加工、柠檬酸等行业的净化系统中。

Dry desulfurization equipment can be used in the purification system of biogas, aquaculture, starch, papermaking, sewage treatment, alcohol, chemical fiber, pharmacy, chemical fertilizer, coking, landfill, gas, ceramics, food, corn deep processing, citric acid and other industries.

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