濕法脫硫除塵器多采取一機(jī)多級(jí)的除塵方式，是一種除塵效率高、脫硫效果好、不腐蝕引風(fēng)機(jī)和煙筒、減少煙氣流通阻力、節(jié)約用水、根除排污水二次污染、設(shè)備簡(jiǎn)單、成本低的脫硫除塵設(shè)備。廣泛應(yīng)用于耐火材料加工、煉鋼電爐、磨料冶煉、電石爐生產(chǎn)、高爐煤氣、煤粉制備、瀝青混凝土生產(chǎn)、炭黑生產(chǎn)、建材加工、化工行業(yè)、電解鋁加工、鋁鋅冶煉過程中除塵等行業(yè)。
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：帶塵煙氣或硫化物進(jìn)入濕法脫硫除塵器進(jìn)煙口，先由下部干式除塵器將煙氣中90%以上的粗粉塵除去后，煙氣由螺旋直管進(jìn)入上部濕法脫硫除塵器中的煙氣擴(kuò)散室，靠含塵及硫化物氣流自身直接沖擊液面，大量旋渦及水花碰撞，較大的塵粒落入池底水中。煙氣及微小的塵粒進(jìn)入液滴分離室，經(jīng)混合噴霧裝置循環(huán)洗滌與煙氣充分接觸混合，擴(kuò)散漂移，返入煙氣渦流室，在急劇轉(zhuǎn)向高度氣流的狀態(tài)下，進(jìn)入氣水分霧室，煙塵及硫化物又一次被捕集分離，在引風(fēng)機(jī)負(fù)壓作用下，煙氣攜帶部份水氣液滴，經(jīng)氣水分離裝置進(jìn)入?yún)R煙室將凈化后的煙氣由排煙口排出。同時(shí)煙氣中的硫化物經(jīng)與含有石灰乳或堿的加藥平衡罐循環(huán)洗滌反應(yīng)，生成亞硫酸鈣晶體夾著灰泥沉入水中，由排污閥排入沉淀池中。
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.
濕法和干法的主要區(qū)別：
Main differences between wet method and dry method:
濕法脫硫的特點(diǎn)是脫硫系統(tǒng)位于除塵器之后、煙道的末端，脫硫過程中的反應(yīng)溫度低于露點(diǎn)，因此脫硫后的煙氣需要重新加熱才能排出。由于氣液反應(yīng)，濕法煙氣脫硫存在廢水處理問題，初期投資大，運(yùn)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.
干法脫硫劑與煙氣中的SO2發(fā)生反應(yīng)，產(chǎn)生硫酸鈣，SO2通過電子束照射或活性炭吸附轉(zhuǎn)化為硫酸氨或硫酸。其優(yōu)點(diǎn)是工藝簡(jiǎn)單，無污水，無污酸處理，能耗低，特別是凈化后煙氣溫度高，有利于煙囪排氣擴(kuò)散，無白煙。與濕法脫硫系統(tǒng)相比，設(shè)備簡(jiǎn)單，占地面積小，投資運(yùn)營(yíng)成本低，操作方便，能耗低，產(chǎn)品處理方便，無污水處理系統(tǒng)。
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.
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2022-08-08
