Analisa Air

TEKNIK LABORATORIUM ANALISA AIR PROSES

KEBUTUHAN PABRIK KEBUTUHAN DOMESTIK SODA ASH POLYMER TAWAS CLARIFIER

TANK TANK

POND

SAND FILTER

TOWER TANK

RIVER DEAERATOR

DEAERATOR

FEED TANK

KATION EXCHAGER

ANION EXCHANGER

DENIN PLANT

FLOW DIAGRAM PENGOLAHAN AIR DI PKS

BOILER

FILTRASI Type-type filter (granular) 1. 2. 3.

Gravity Pressure (bertekanan) Up flow

Contoh media filter (granular) 1. 2. 3.

Pasir : spgr 2,65 (rata-rata) Antrachite coal : spgr 1,35 – 1,75 Garned sand : spgr 4,0 – 4,2

Media yang dipakai di dalam suatu filter bisa single atau multi media

Sample Frekwensi Sampling

Raw Water Satu kali setiap proses

Pengukuran dan Analisa

pH dan Conductivity raw water (Lihat WI-SAG-PKSLAB-0121 : Analisa pH dan Conductivity) Total Hardness raw water (Lihat WI-SAG-PKS-LAB0123 : Analisa Total Hardness) Silica raw water ( Lihat WI-SAG-PKS-LAB-0126 : Analisa Silica )

Standard

-

Sample

Air ex. Clarifier Tank

Frekwensi Sampling

Setiap 2 jam selama proses

Pengukuran dan Analisa

pH dan Conductivity air ex.Clarifier (Lihat WI-SAGPKS-LAB-0121 : Analisa pH dan Conductivity)

Standard

pH air ex clarifier : 6.5 – 7.5 Conductivity air ex.clarifier : < 150 um

DEMINERALIZER Inlet

CATION EXCHANGER

ANION EXCHANGER

resin

resin

Outlet

Sample Frekwensi Sampling

Air ex. Kation Satu kali setiap proses

Pengukuran pH dan Conductivity air ex.Kation (Lihat WIdan Analisa SAG-PKS-LAB-0121 : Analisa pH dan Conductivity Total Hardness Air ex.Kation (Lihat WI-SAGPKS-LAB-0123 : Analisa Total Hardness) Standard

pH air ex.kation : 2.5 – 5.5 Total Hardness air ex.kation : < 2 ppm

Sample Frekwensi Sampling Pengukuran dan Analisa

ex. Anion Satu kali setiap proses

Standard

pH dan Conductivity air ex.Anion (Lihat WI-SAGPKS-LAB-0121 : Analisa pH dan Conductivity) Silica air ex.anion (Lihat WI-SAG-PKS-LAB0126 : Analisa Silica) pH air ex anion: 7.0 – 10 Conductivity air ex.anion: < 100 um Silica air ex.anion : < 5 ppm

Tray De-aerator

Sample Frekwensi Sampling

Feed Tank dan Deaerator Satu kali setiap proses

Pengukuran pH dan Conductivity feed tank (Lihat WI-SAGdan Analisa PKS-LAB-0121 : Analisa pH dan Conductivity) Total Hardness feed tank (Lihat WI-SAG-PKSLAB-0123 : Analisa Total Hardness) Silica feed tank (Lihat WI-SAG-PKS-LAB0126 : Analisa Silica) Standard

pH feed tank : 7.0 – 10 Conductivity feed tank : < 120 um Total Hardness feed tank : < 2 ppm Silica feed tank : < 5 ppm

BOILER Diagram sederhana sebuah boiler : •

PARAMETER KONTROL Rekomendasi kualitas air untuk water tube boiler dengan tekanan 300 psig Parameter

Limit

Control

pH Conductivity M-alk. O-alk. Phosphate Sulfite Silica Iron

10.5 - 11.5 2,500 max 700 max 2.5 x silica 30 - 50 30 - 50 90 max 2 max

N 8507 atau blowdown Blowdown N 8507 atau blowdown N 8507 atau blowdown N 3273 N 2811 N 8507 atau blowdown N 7203