湿法脱硫除尘器多采取一机多级的除尘方式，是一种除尘效率高、脱硫效果好、不腐蚀引风机和烟筒、减少烟气流通阻力、节约用水、根除排污水二次污染、设备简单、成本低的脱硫除尘设备。广泛应用于耐火材料加工、炼钢电炉、磨料冶炼、电石炉生产、高炉煤气、煤粉制备、沥青混凝土生产、炭黑生产、建材加工、化工行业、电解铝加工、铝锌冶炼过程中除尘等行业。
The wet desulfurization and dust remover is a kind of desulfurization and dust removal equipment with high dust removal efficiency, good desulfurization effect, no corrosion of induced draft fan and chimney, reduction of flue gas flow resistance, water saving, eradication of secondary pollution of sewage, simple equipment and low cost. It is widely used in refractory material processing, steel-making electric furnace, abrasive smelting, carbide furnace production, blast furnace gas, coal powder preparation, asphalt concrete production, carbon black production, building materials processing, chemical industry, electrolytic aluminum processing, dust removal during aluminum zinc smelting and other industries.
其工作原理是：带尘烟气或硫化物进入湿法脱硫除尘器进烟口，先由下部干式除尘器将烟气中90%以上的粗粉尘除去后，烟气由螺旋直管进入上部湿法脱硫除尘器中的烟气扩散室，靠含尘及硫化物气流自身直接冲击液面，大量旋涡及水花碰撞，较大的尘粒落入池底水中。烟气及微小的尘粒进入液滴分离室，经混合喷雾装置循环洗涤与烟气充分接触混合，扩散漂移，返入烟气涡流室，在急剧转向高度气流的状态下，进入气水分雾室，烟尘及硫化物又一次被捕集分离，在引风机负压作用下，烟气携带部份水气液滴，经气水分离装置进入汇烟室将净化后的烟气由排烟口排出。同时烟气中的硫化物经与含有石灰乳或碱的加药平衡罐循环洗涤反应，生成亚硫酸钙晶体夹着灰泥沉入水中，由排污阀排入沉淀池中。
Its working principle is: the dusty flue gas or sulfide enters the inlet of the wet desulfurization dust remover. After more than 90% of the coarse dust in the flue gas is removed by the lower dry dust remover, the flue gas enters the flue gas diffusion chamber in the upper wet desulfurization dust remover through the spiral straight pipe. The dust and sulfide gas flow directly impacts the liquid surface, a large number of vortices and splashes collide, and large dust particles fall into the pool bottom water. The flue gas and tiny dust particles enter the liquid droplet separation chamber, are fully contacted and mixed with the flue gas through the circulating washing of the mixing spray device, diffuse and drift, return to the flue gas vortex chamber, and enter the gas water mist chamber in the state of sharply turning to the high air flow. The flue gas and sulfide are collected and separated again. Under the negative pressure of the induced draft fan, the flue gas carries part of the water gas droplets, The purified flue gas enters the smoke collecting room through the gas-water separation device and is discharged from the smoke outlet. At the same time, the sulfide in the flue gas reacts with the dosing balance tank containing lime milk or alkali to generate calcium sulfite crystals, which are immersed into the water with mortar, and then discharged into the sedimentation tank through the blowdown valve.
湿法和干法的主要区别：
Main differences between wet method and dry method:
湿法脱硫的特点是脱硫系统位于除尘器之后、烟道的末端，脱硫过程中的反应温度低于露点，因此脱硫后的烟气需要重新加热才能排出。由于气液反应，湿法烟气脱硫存在废水处理问题，初期投资大，运行成本高。
The characteristic of wet desulfurization is that the desulfurization system is located behind the dust collector and at the end of the flue. The reaction temperature in the desulfurization process is lower than the dew point. Therefore, the flue gas after desulfurization needs to be reheated before it can be discharged. Due to the gas-liquid reaction, the wet flue gas desulfurization has the problems of wastewater treatment, large initial investment and high operating cost.
干法脱硫剂与烟气中的SO2发生反应，产生硫酸钙，SO2通过电子束照射或活性炭吸附转化为硫酸氨或硫酸。其优点是工艺简单，无污水，无污酸处理，能耗低，特别是净化后烟气温度高，有利于烟囱排气扩散，无白烟。与湿法脱硫系统相比，设备简单，占地面积小，投资运营成本低，操作方便，能耗低，产品处理方便，无污水处理系统。
The dry desulfurizer reacts with SO2 in the flue gas to produce calcium sulfate. SO2 is converted into ammonia sulfate or sulfuric acid by electron beam irradiation or activated carbon adsorption. It has the advantages of simple process, no sewage, no acid treatment, low energy consumption, especially the high temperature of flue gas after purification, which is conducive to the diffusion of chimney exhaust and no white smoke. Compared with the wet desulfurization system, the equipment is simple, the floor area is small, the investment and operation cost is low, the operation is convenient, the energy consumption is low, the product treatment is convenient, and there is no sewage treatment system.
The above is the detailed introduction of dry desulfurization for you. I hope it will help you. If you have any questions, please contact us. We will provide you with services in a professional manner https://www.hneee.net
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