摘要
通过某电厂2×300 MW燃煤机组超低排放改造项目的实践,对"203"超低脱硫除尘技术进行了验证。该技术以"单塔双区"为核心,即在吸收塔浆池内形成两个pH值分区,兼顾SO_2吸收以及石膏氧化过程,配合优化喷淋区域、增设多孔性分布器及均匀流场等措施,达到高效脱硫协同除尘的目的。某电厂采用该技术改造后的投运结果显示,机组满负荷时采用单塔即可达到99.6%以上的脱硫效率,在不加装湿式除尘器的条件下,FGD出口粉尘能够稳定地控制在3 mg/Nm^3以内,优于最新环保要求,两台机组每年可向大气减排SO_268 315 t、粉尘812.5 t。
The advantage of “203” new ultra-low desulfurizing and de-dusting technology was approved by one ultra-low emission renovation project. The core of this technology is “Single-Absorber-Two-Areas （SATA）”,supplied with the techniques of spray area optimization, additional double porous distributors and uniform flow field control. The technology was practiced in a power stat ion, where only one absorber was applied and no wet dust collector was installed. The results indicated that the desulphurization efficiency could reach 99. 6% in ultra-low emission renovation project, and the dust concentration in FGD exit was stabilized within 3 mg/Nm^3. The two sets of units would be able to reduce 68 315 tons of S02 emission and 812. 5 tons of dust emission per year.
出处
《环境影响评价》
2017年第1期57-60,共4页
Environmental Impact Assessment
关键词
单塔双区
高效
脱硫
协同除尘
强化措施
SATA
high efficiency
desulfurization
de-dusting
strengthening measures
