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Chemical Plant Expansion

Location:

Aracruz Pulp, Brazil

Client:

Nexen Quimica Brazil Ltda

Type:

Electrochemical, (Chlorate and Chloralkali)

Design Condition:

50% Plant Expansion

Date:

September 2000 to May 2002


The Project Scope included site de-bottlenecking, plant reconfiguration and expansion. NORAM's scope of services included design of process, mechanical, electrical, instrumentation, and controls systems; procurement and expediting; site construction, commissioning and start up assistance.

Plant production increased to:

32% Caustic Solution

147 mtpd

Chlorine Gas

130 mtpd

32% HCl

65 mtpd

135 gpl Sodium Hypochlorite

11 mtpd


Hypochlorite System Replacement
Before:
Single stage caustic scrubber
Limited capacity
After:
Two stage caustic scrubber
Rated for full cellroom production

Chlorine Compression System
Replacement

Before:
Multi-stage centrifugal compressor
Pre-cooling
High maintenance
After:
Liquid Ring compressor
Simple operation / Low maintenance

Expansion of HCl System
Before:
HCl synthesis and tail gas scrubbing
Operation with dry Cl2 only
After:
New HCl synthesis and tail gas scrubbing
Operation with wet or dry Cl2

Rectifier Relocation and Addition
Before:
Two Chlorate cell lines
One rectifier for each line
13.8 kV feed from Pulp Mill
After:
Two Chlorate cell lines
One new rectifier on one line
Two paralleled rectifiers on second line
New 138 kV substation
New harmonic filter bank


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