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脫硫塔中的設(shè)備主要包括攪拌器，氧化風(fēng)管，噴淋管，除霧器，其他方案包括擋板或均勻分布地板。位于脫硫塔底部的攪拌器主要起到泥漿攪動(dòng)的作用，防止石膏等顆粒的沉積。
氧化管道主要是將空氣注入塔內(nèi)的泥漿池中，將亞硫酸鹽氧化成硫酸鹽，配套設(shè)備是氧化風(fēng)扇。管道是將漿料通過循環(huán)泵送到脫硫塔漿池區(qū)，通過噴嘴霧化并分散，然后吸收煙道氣中的SO2氣體。除霧器的主要作用是去除煙道氣中攜帶的液滴，即去除水的作用。
脫硫劑的表面具有活性、催化氧化的作用之外，這種設(shè)備還可以直接地促進(jìn)SO2反應(yīng)，使CaCO3的溶解加快，促進(jìn)CaSO3向CaSO4的快速氧化，使CaSO4的沉積加強(qiáng)，并且還可以讓液氣比，鈣的比例降低，去硫，減少水的蒸騰作用。
當(dāng)煙氣入口SO2濃度高于計(jì)劃值時(shí)，吸收塔反應(yīng)池中的PH值將降低，并且當(dāng)需要更大的Ca / S比時(shí)，無需擴(kuò)展CaCO3即可迅速溶解CaCO3。加入鈣離子使?jié){料的PH值保持在正常范圍內(nèi)，對(duì)pH值有一定的緩沖作用。
The equipment in the desulfurization tower mainly includes agitator, oxidation air pipe, spray pipe and demister. Other schemes include baffle or evenly distributed floor. The agitator at the bottom of the desulfurization tower mainly plays the role of slurry stirring to prevent the deposition of gypsum and other particles.
The oxidation pipeline mainly injects air into the mud pit in the tower to oxidize sulfite into sulfate. The supporting equipment is oxidation fan. The pipeline sends the slurry to the slurry tank area of the desulfurization tower through the circulating pump, atomizes and disperses through the nozzle, and then absorbs the SO2 gas in the flue gas. The main function of demister is to remove the droplets carried in flue gas, that is, to remove water.
In addition to the active and catalytic oxidation on the surface of desulfurizer, this equipment can also directly promote the SO2 reaction, accelerate the dissolution of CaCO3, promote the rapid oxidation of CaSO3 to CaSO4, strengthen the deposition of CaSO4, reduce the liquid-gas ratio and calcium ratio, remove sulfur and reduce the transpiration of water.
When the SO2 concentration at the flue gas inlet is higher than the planned value, the pH value in the reaction tank of the absorption tower will decrease, and when a larger Ca / S ratio is required, CaCO3 can be dissolved quickly without expanding CaCO3. Adding calcium ion keeps the pH value of the slurry within the normal range and has a certain buffer effect on the pH value.
