Tag: hypochlorite

Chemical Dosing Systems from 3D Models – The Quality Way

Designed first digitally and built from the 3D model

Posted on by Paul

Know what you’ll get, before it’s built

When you buy a car, you can see it in the showroom before you buy it. When it arrives, it is exactly as you had envisioned and there are no (nasty) surprises. With Dioxide Pacific, it’s the same with everything we build. It may be a standard product like our Electricide® chlorine/chlorine dioxide generators or a bespoke chemical dosing skid. Either way, we always produce a 3D model of the system using Autodesk Inventor, which becomes the template for our staff to build the item. Generally, we don’t produce 2D fabrication drawings as we find the 3D model is easier and more accurate to build from. When you order a system, you’ll be provided with the 3D model and the ability to view the model from different angles; parts transparent or hidden and measurement tools. You can ask for changes to be made at that time until you are happy with the layout. The built system will be exactly the same as the 3D model you have approved. It will fit in the space you have allocated and connect to services exactly as promised.

Sodium Hypochlorite Dosing Skid for Water Authority

Dioxide Pacific recently designed and built a chemical dosing skid for sodium hypochlorite for an odour scrubber. The dosing skid is a powder coated stainless steel frame with Fiberstrut base, HDPE sides and a polycarbonate splash screen. Metering pumps ProMinent Sigma/3. All accessories including actuated ball valves, mag flow meter, pressure gauge and pulsaton dampener are fixed to the HDPE back using Fiberstrut bolts and pipe clamps.

Sodium hypochlorite dosing skid 3D model

The 3D model was developed from the P&ID and approved by the customer prior to fabrication.

Sodium Hypochlorite chemical dosing skid

When complete, the skid was tested at our works and delivered to site. Time frame from approval of the 3D model to delivery was 4 weeks. This short time frame was critical to the customer.

Interested to know more or obtain a quotation?

Dioxide Pacific can provide design drawings and manufacture storage, transfer and dosing systems for just about any chemical you can name. We’ve been doing this successfully for more than 17 years. Looking for a quality outcome – we won’t let you down.

Download the chemical dosing systems brochure pdf-icon-aa-30x30

Contact us for more information or a quotation.

Generate Hypochlorite from Salt – Safe and Clean in Food Environment

Safety concerns with using 12.5% sodium hypochlorite

Posted on by Paul

Safety is always a concern to plant managers

Recently, we received an inquiry from a customer indirectly servicing the food industry. Their water is used for washing and must be clean and disinfected. They were looking for a disinfection method that would minimize their safety risk on site. Filtration+UV was chosen as the primary method although they realized it would not be sufficient on it’s own as the reticulation pipework would require a chemical residual of either chlorine (hypochlorite) to prevent biofilm growth.

Chlorine Considerations

This is how the customer perceived the various alternatives:

What is the Electricide® HGB Hypochlorite Generator?

The Electricide® HGB chlorine generator is an electrochemical system for converting sodium chloride (salt) into chlorine. Electricide-B1 is a purified brine precursor that is fed into the HGB generator at the anode side of the electrolytic cell where chloride ion is oxidised to chlorine. Chlorine combines with the hydroxide formed at the cathode to make sodium hypochlorite solution at 5-25 g/L (as NaOCl). The generator is skid mount and easy to install on site. Electricide-B1 chemical is available ex stock from Dioxide Pacific.

Chlorine Generation Reactions:

① Anode (oxidation): 2Cl– → Cl2 + 2e–

② Cathode (reduction): 2H2O + 2e– → H2 + 2OH–

① + ② (combined) 2Cl– + 2H2O → Cl2 + H2 + 2OH–

Chlorine reacts with caustic catholyte to form sodium hypochlorite and salt.

Cl2 + 2NaOH → NaCl + NaOCl

What is good about it?

  • Safety. Only one precursor chemical is required – Electricide-B1 and this is non-hazardous. The hypochlorite solution produced is 5-25 g/L at pH 9 – 9.5. This compares with commercial bleach at 12.5% (125 g/L) at pH 12. The lower concentration hypochlorite is much safer to handle and store.
  • Stability. The lower concentration hypochlorite produced by the HGB generator is 25 times more stable in storage than commercial bleach. Longer life means lower cost.
  • Purity. The hypochlorite solution produced by the HGB generator is extremely low in chlorate, sodium and chloride. This can be important for food production where low chlorate and perchlorate in the food product are important.
  • Simplicity. The generator is simple to operate, install and maintain.
  • Remote access. Web server access using any browser is standard with email alarms.
  • Reliability. The generator membrane cell is guaranteed when Electricide-B1 is used as the precursor.

Interested?

The Electricide® HGB generators are available for purchase or rental. Rental can include maintenance.

Electricide-B1 chemical is available in IBC’s (totes), 200L (55 gal) or 15L (5 gal) drums.

Dioxide Pacific can install and commission the system if desired. Installation is a simple process for mechanical and electrical technicians.

Download the Brochure pdf-icon-aa-30x30

Contact us for more information or a quotation.