威尼斯官方网站-威尼斯网址

您好,欢迎光临山东恒能环保能源设备有限企业官网!为您提供完善的沼气生物脱硫、沼气提纯设备以及服务!欢迎来电!

威尼斯官方网站 - 威尼斯官方网站 >

脱硫废水当前的处理工艺?

时间:2021-05-14
网址:
阅读量:
针对脱硫废水的处理,目前普遍采用氧化、中和、絮凝、沉淀等方法,主要包括以下几个步骤:
For the treatment of desulfurization wastewater, oxidation, neutralization, flocculation, sedimentation and other methods are widely used, mainly including the following steps:
1.COD处理
1. Cod treatment
脱硫废水中的COD大部分来自于二价铁盐或以S2O6为主体的硫磺化合物。对于二价铁盐,可通过调节pH至8——10即可在空气中氧化生成Fe(OH)3沉淀。针对S2O6为主体的硫磺化合物,若仅采用氧化还原、活性炭吸附等处理,很难处理到10mg/L浓度以下,因此,目前主要以增设合成吸附剂进行处理为主要手段,即进一步使用合成吸附剂吸附处理并用药品进行脱附,脱附后的COD以浓溶液形式取出,再进一步处理。
Most of COD in desulfurization wastewater comes from ferrous salts or sulfur compounds with s2o6 as the main body. For divalent iron salt, Fe (OH) 3 can be oxidized in air by adjusting pH to 8-10. Sulfur compounds with s2o6 as the main body are difficult to be treated below 10mg / L if they are only treated by oxidation-reduction and activated carbon adsorption. Therefore, at present, the main method is to add synthetic adsorbent for treatment, that is, to further use synthetic adsorbent for adsorption treatment and drug desorption, and then take out COD in the form of concentrated solution for further treatment.
                  生物脱硫
2.重金属的处理
2. Treatment of heavy metals
重金属的处理主要通过沉淀法实现。首先投加Ca(OH)2浆液调节pH至9左右。此项操作的目的一是为调节pH满足排放标准,二是将金属离子以M(OH)n形式析出,以去除废水中的金属离子,三是利用Ca(OH)2与F-反应生成CaF沉淀的特性除去废水中的F-。研究表明,加入废水中的Ca(OH)2的质量浓度达到900mg/L时,氟离子浓度可降到5——8mg/L甚至更低,可满足排放标准要求。对于镉、汞等重金属,应采用硫化物沉淀法,通过生成更难溶解(离子积常数更小)的MnSm加以去除。
Heavy metals are mainly treated by precipitation. First, add Ca (OH) 2 slurry to adjust pH to about 9. The purpose of this operation is to adjust the pH to meet the discharge standard, precipitate the metal ions in the form of M (OH) n to remove the metal ions in the wastewater, and use the characteristics of CAF precipitation formed by the reaction of Ca (OH) 2 and F - to remove the F - in the wastewater. The results show that when the mass concentration of Ca (OH) 2 in the wastewater reaches 900 mg / L, the fluoride ion concentration can be reduced to 5-8 mg / L or even lower, which can meet the requirements of the discharge standard. For cadmium, mercury and other heavy metals, sulfide precipitation method should be used to remove them by producing mnsm which is more difficult to dissolve (with smaller ion product constant).
3.悬浮物处理
3. Suspended solids treatment
悬浮物的处理主要通过絮凝方法实现,即通过投加混凝剂、助凝剂在水体中发生反应,絮凝剂在搅拌下分散后并加快水解反应和脱稳,使水中胶体态悬浮物脱稳形成细小矾花。伴随微弱搅拌的进行,矾花不断成长为大絮体,而助凝剂的投加进一步促进絮体成长增加沉淀性。完全反应后经斜板沉淀池进行沉淀排泥以达到去除的目的。
The treatment of suspended solids is mainly realized by flocculation, that is, coagulant and coagulant aid are added to react in the water body. After the flocculant is dispersed under stirring, the hydrolysis reaction and destabilization are accelerated, and the colloidal suspended solids in the water are destabilized to form fine alum. With the weak agitation, alum flocs grow into large flocs, and the addition of coagulant aids further promote the growth of flocs and increase the precipitability. After complete reaction, the sludge is precipitated and discharged through inclined plate sedimentation tank to achieve the purpose of removal.

威尼斯官方网站|威尼斯网址

XML 地图 | Sitemap 地图