Continuous High Strength, Low Salt (HSLS) Hypo Production System

High Strength Low Salt Bleach

The Powell Continuous High Strength Low Salt (HSLS) Sodium Hypochlorite System can produce up to 30 wt.% sodium hypochlorite (bleach) containing only 8.5 wt.% salt. With the reduction in salt content and with reduced levels of sodium chlorate and sodium perchlorates achieved using the patented technology, diluted High Strength Low Salt (HSLS) Hypo is a high quality product that is more stable, has a significantly extended shelf life, and is 4% lighter in weight in comparison to standard sodium hypochlorite (13 wt.% containing 10.4 wt.% salt).

The high strength, low salt sodium hypochlorite production process is a unique two stage process consisting of the chlorination stage and the salt removal stage. The plant is completely automatic and requires only that someone be available if a process upset occurs. The system has an adjustable production rate and is able to produce strengths up to 385 grams per liter available chlorine. Systems are completely skid mounted on structural steel frames. The dimensions for a system that could convert 25 STPD of chlorine to 30 wt.% Hypo would be approximately 40' long x 40' wide x 20' high.

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Sodium Hypochlorite Production using Wet Vapor Chlorine from Electrolytic Cells

Chloralkali Bleach Plant

The sodium hypochlorite process is a unique process utilizing wet vapor chlorine and sodium hydroxide (caustic). It will safely produce high quality bleach at a minimum operating cost. The plant is equipped with numerous safety devices which are intended to shut down the system in the event of a process upset. The plant is completely automatic and requires only that someone be available if a process upset occurs.

The systems are available in various production rates. Standard systems are rated for 50, 100, and 200 STPD of chlorine. Each system has an adjustable production rate and is able to produce strengths up to 200 grams per liter available chlorine. The bleach strength and residual caustic levels are controlled at very high tolerances and can be adjusted at any time during production. The systems are designed for a completely automatic operation and can be started or stopped at any moment. Systems are completely skid mounted on a structural steel frame approximately 30’ long x 12’ wide x 30’ high. The system can be designed (as shown in picture) with an integrated chlorine scrubber system. This would increase the width of the system to 24’.

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Dry Liquid or Vapor Sodium Hypochlorite Production System

Bleach Plant

This system is available in two designs: one that utilizes pressurized dry vapor chlorine or one that utilizes pressurized dry liquid chlorine. Standard systems are designed to produce concentrations from 20-200 grams per liter available chlorine with production rates from 25-150 gallons per minute which is equivalent to 30-200 STPD of chlorine.

The systems are available in various production rates. Standard systems are rated for 25, 50, 80, and 150 gallons per minute of 160 grams per liter available chlorine. Each system has an adjustable production rate and is able to produce up to 200 grams per liter available chlorine; however, the rated production rate will be decreased slightly at strengths above 160 gpl due to the increased heat load on the system. 

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Batch Sodium Hypochlorite Production System
Powell Batch Sodium Hypochlorite Production System

The Powell Batch Sodium Hypochlorite System is based on our 40 plus years of experience with bleach operations. The system is designed to produce 1000 to 3000 gallon batches of sodium hypochlorite.

The basic principle of operation is to put water into the Powell recycle tank and add 50% caustic until the strength of the caustic is approximately 6.75% (typical). Within a few batches, the amount of water and amount of caustic to be added will be established and then lines may be drawn on the tank to show the operators how much water, and then caustic, to add.

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