石油学报（石油加工）
石油學報（石油加工）
석유학보（석유가공）
Acta Petrolei Sinica (Petroleum Processing Section)
2015年
5期
1211-1217
,共7页
杨伟%刘芳%樊丰涛%张利
楊偉%劉芳%樊豐濤%張利
양위%류방%번봉도%장리
混凝沉淀法%循环水排污水%水处理药剂%混凝效果%剩余浊度
混凝沉澱法%循環水排汙水%水處理藥劑%混凝效果%剩餘濁度
혼응침정법%순배수배오수%수처리약제%혼응효과%잉여탁도
coagulant-sedimentation method%blow-down water from circulating water system%water treatment agents%coagulation effect%residual turbidity
混凝沉淀法处理循环水排污水时，由于排污水中残余药剂的影响，混凝往往达不到理想效果。为了寻求药剂对混凝过程及机理的影响，首先对混凝剂（PAC）、助凝剂（PAM ）的投加量以及混凝条件进行优化，然后在优化的混凝条件下，考察单体药剂以及复配药剂对排污水混凝效果的影响，还考察了药剂对 PAC最佳投加量的影响，并采用扫描电镜观测不同条件下絮凝体的微观结构。结果表明，PAC 和 PAM 的最佳投加量分别为40 mg／L、0.8 mg／L ，最佳混凝条件为快速搅拌时间3 min、慢速搅拌速率90 r／min、快速搅拌速率300 r／min、慢速搅拌时间10 min；在此条件下，排污水浊度去除率可达93.49％。PASP对排污水混凝效果影响最大，且剩余浊度波动性大，波动范围0.85～1.78 NTU （Nephelometric Turbidity Unit）；1227对 PAC最佳投加量影响最大，波动范围20～70 mg／L。排污水存在复配药剂时，其混凝后得剩余浊度都大于无药剂时的0.98 N T U。不同条件下的排污水混凝所得絮凝体结构存在明显的差异，从而导致了混凝效果的不同。
混凝沉澱法處理循環水排汙水時，由于排汙水中殘餘藥劑的影響，混凝往往達不到理想效果。為瞭尋求藥劑對混凝過程及機理的影響，首先對混凝劑（PAC）、助凝劑（PAM ）的投加量以及混凝條件進行優化，然後在優化的混凝條件下，攷察單體藥劑以及複配藥劑對排汙水混凝效果的影響，還攷察瞭藥劑對 PAC最佳投加量的影響，併採用掃描電鏡觀測不同條件下絮凝體的微觀結構。結果錶明，PAC 和 PAM 的最佳投加量分彆為40 mg／L、0.8 mg／L ，最佳混凝條件為快速攪拌時間3 min、慢速攪拌速率90 r／min、快速攪拌速率300 r／min、慢速攪拌時間10 min；在此條件下，排汙水濁度去除率可達93.49％。PASP對排汙水混凝效果影響最大，且剩餘濁度波動性大，波動範圍0.85～1.78 NTU （Nephelometric Turbidity Unit）；1227對 PAC最佳投加量影響最大，波動範圍20～70 mg／L。排汙水存在複配藥劑時，其混凝後得剩餘濁度都大于無藥劑時的0.98 N T U。不同條件下的排汙水混凝所得絮凝體結構存在明顯的差異，從而導緻瞭混凝效果的不同。
혼응침정법처리순배수배오수시，유우배오수중잔여약제적영향，혼응왕왕체불도이상효과。위료심구약제대혼응과정급궤리적영향，수선대혼응제（PAC）、조응제（PAM ）적투가량이급혼응조건진행우화，연후재우화적혼응조건하，고찰단체약제이급복배약제대배오수혼응효과적영향，환고찰료약제대 PAC최가투가량적영향，병채용소묘전경관측불동조건하서응체적미관결구。결과표명，PAC 화 PAM 적최가투가량분별위40 mg／L、0.8 mg／L ，최가혼응조건위쾌속교반시간3 min、만속교반속솔90 r／min、쾌속교반속솔300 r／min、만속교반시간10 min；재차조건하，배오수탁도거제솔가체93.49％。PASP대배오수혼응효과영향최대，차잉여탁도파동성대，파동범위0.85～1.78 NTU （Nephelometric Turbidity Unit）；1227대 PAC최가투가량영향최대，파동범위20～70 mg／L。배오수존재복배약제시，기혼응후득잉여탁도도대우무약제시적0.98 N T U。불동조건하적배오수혼응소득서응체결구존재명현적차이，종이도치료혼응효과적불동。
When the blow‐down water from circulating water system is treated by coagulant‐sedimentation method ,the water treatment agents in it would have a certain effect on coagulation effect .For seeking influence of the agents on the coagulation process and its mechanism , the dosages of coagulant ,coagulant aid and operating conditions were optimized firstly ,and then the effects of single and compound water treatment agents on coagulation were investigated . In addition ,the effects of agents on optimum dosing amount of coagulant were investigated and flocculation obtained under different conditions was analyzed by SEM .The results showed that the optimized dosages of PAC and PAM were 40 mg/L and 0.8 mg/L ,respectively ,and the optimal operating conditions were fast stirring for 3 min at 300 r/min and slow stirring for 10 min at 90 r/min ,under which the coagulation effect of blow‐down water was best and turbidity removal rate reached 93.49% .Polyaspartic acid (PASP) had a greatest influence on coagulation of blow‐down water and residual turbidity raged from 0.85 to 1.78 nephelometric turbidity unit (NTU ) , w hile dodecyl dimethyl benzyl ammonium chloride (1227) had a greatest influence on the optimum amount of PAC ,which ranged from 20 to 70 mg/L .Residual turbidity was greater than 0.98 NTU at the existence of compound agents . According to SEM photos , the difference in microstructures of flocculation from blow‐down water at different coagulation conditions led to different coagulation effect .
