GE E-CELL STACK MK-2 Series - Safety; Cleaning Chemical Specifications; Cleaning Setup and Instructions

rev.1.1 Page 11-24
The Long Term Shutdown procedure must be followed if the E-Cell System
™
is to be down for
more than three days.
11.2.2 Safety
1) Avoid contact with Halane (1,3-Dichloro-5,5-dimethyl hydantoin), sodium hydroxide,
peracetic acid, hydrogen peroxide and hydrochloric acid, as these are corrosive.
Hydrogen peroxide is an oxidizer.
2) Depressurize all process lines to avoid high-pressure chemical spray.
3) The E-Cell System
™
operates at high voltage. Before performing any maintenance,
ensure rectifier power is off and the rectifier properly tagged and/or locked out.
11.2.3 Cleaning Chemical Specifications
All chemicals must be of recommended grade or better.
Sodium Chloride (NaCl) Food Grade (≥99.80%), ACS or USP grade
Halane (1,3-Dichloro-5,5-dimethyl hydantoin) USP or ACS grade
Peracetic Acid (CH
3
COOOH) and Hydrogen Peroxide (H
2
O
2
) 30%: ACS grade, or
commercial concentrate for water system cleaning (ex. Minntec Minncare, Henkel-
Ecolab Oxonia Active, Diversey Divosan, or FMC Flocide)
Hydrochloric Acid (HCl) ACS or Technical grade
Sodium Hydroxide (NaOH): Pellets, NF, ACS or Purified grade; or 50% w/w Solution
11.3 CLEANING SETUP AND INSTRUCTIONS
There are eight cleaning procedures in total, made up of combinations of four basic types of
cleaning: low pH; high pH; mild oxidizing sanitization/cleaning; and sodium chloride rinse.
The first cleaning procedure is performed only on the Concentrate and Electrode chambers
of the Stack. Its setup is different from the remaining seven procedures, where cleaning is
done on all chambers, Dilute, Concentrate and Electrode.
The description of the four cleaning types is laid out in this section, as are the descriptions of
the water rinse and final water rinse. The list of individual steps is shown for procedures 2
through 8. Procedure 1 is laid out in detail in its own section.
A cleaning tank and pump and four hoses to connect the tank and pump to the E-Cell
System
™
are required for procedures 2 through 8; for procedure 1, only three hoses are
required.