1 稀品工序氧化残液和浓品残液全年回收800t左右,每吨残液售价平均600元左右,为工厂创收48万元。
2 浓品工序回收的冷凝水年节约脱盐水量为840t左右,为工厂节约4万元。
3 开车初期,该厂每天处理污水20t左右,全年浓品开车有60天左右,全年污水量有4200t左右。经技改大部分污水回收利用后,每天处理污水3t左右,全年污水量仅有1000t右,每吨污水处理费用为11.5元左右,全年节约费用:
(4200-1080)×11.5=3.6(万元)
当污水水质稳定,COD稳定在600~2000mg/L时,处理每吨污水原材料的消耗情况见表2。
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>名称
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>单位
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>消耗量
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>单位成本/元
normal style="mso-layout-grid-align: none">阳离子絮凝剂
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kg
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.001
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>1
normal style="mso-layout-grid-align: none">阳离子絮凝剂
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kg
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.0005
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.5
normal style="mso-layout-grid-align: none">残液(双氧水)
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kg
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>3
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>2
normal style="mso-layout-grid-align: none">硫酸
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kg
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.5
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.5
normal style="mso-layout-grid-align: none">硫酸亚铁
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kg
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>3
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>2.3
normal style="mso-layout-grid-align: none">烧碱
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kg
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>3
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>3
normal style="mso-layout-grid-align: none">电
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>kWh
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>4
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>1.8
normal style="mso-layout-grid-align: none">水
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>m3
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.3
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>0.4
normal style="mso-layout-grid-align: none">累计费用
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>
normal style="TEXT-ALIGN: center; mso-layout-grid-align: none" align=center>11.5
表2 每吨污水消耗原材料及费用表