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Neutralization is the pH adjustment of waste streams to within acceptable limits set by regulatory agencies. While it is certainly not a complete treatment of industrial or commercial wastes, it is required in many instances as a final step before discharging into the public sewers.The old method of passing effluent through a neutralizing basin loaded with limestone chips is no longer adequate. Equally unacceptable is the method of neutralization by dilution. Today, a typical neutralization process requires a system capable of handling both acid and caustic wastes at different concentrations and varying flow rates. Such a system must be able to accurately measure and control the pH by using state-of-the-art pH monitoring and control instruments, in conjunction with correctly sized chemical injection pumps.
To meet the ever tightening regulations and to prevent accidental non-compliant discharge, the system must also offer a selection of safety features such as Alarms, safety shut off valves, diversion valves, level controls, etc.
Panner offers a wide range of skid-mounted self-contained neutralization systems in various configurations such as single and dual stage systems, in either standard or dual containment construction. All systems are offered in either gravity flow or complete with installed pumps, when required.
Common to all systems is a minimum field work requirement. All components within the system are pre-installed and wired. The only field requirement is to bring power to the control panel and to hook-up the inlet and outlet piping.
| (*) | Gusetted inlet nozzle. |
| (*) | Gusetted outlet nozzle complete with down pipe extending to within 4" from the bottom. |
| (*) | Vent. |
| (*) | Drain. |
| (*) | Mixing baffles.
|
| (*) | = Specify size & number where applicable. |
The neutralization tank shall have a top mounted mixer with a TEFC motor operating at a maximum speed of 1750 RPM and sized to provide proper agitation for the tank's capacity.
Mixer shaft and propeller shall be of T-316 SST.
The System shall be furnished with (2) ______ Gallon capacity chemical reagent tanks. Chemical addition will take place through a 6" screwed cover opening.
All tanks shall be securely bolted down to a fabricated polypropylene skid.
Each reagent tank shall have a top mounted chemical metering pump and a low level switch.
The metering pump shall be sized to deliver the design feed rate at a capacity setling of 50% of its maximum flow rate.
The pumps shall be paced by a proportional signal from a pH controller and shall be furnished complete with the following:
The level switch for each reagent tank shall be top mounted, positioned to issue an alamm when the reagent level reaches 16-20% of full capacity.
The level switch will be of solid state, gap ultrasonic design with a 4 or 20 mA output. Switch construction shall be of Polypropylene or PVDF as required. Provide a NEMA 4X junction box at the top of the switch assembly.
A NEMA 4X FRP control panel shall be bolted to the skid and pre-wired to the metering pumps, level switches, mixer and pH probe. All wires shall be routed inside PVC coated flexible conduits.
The control panel shall include the following:
| (1) | PH Controller, µ-Processor design with Digital
display, complete with security code lock, with all
operating functions to be menu driven.
The controller outputs shall include:
|
| (1) | Chart recorder, with 100mm chart, programed to last for 30 days. |
| (1) | Mixer Contactor. |
| (1) | Circuit Breaker for mixer motor. |
| (1) | Mixer Delay Timer. |
| (1) | Mixer HOA illuminated selector switch. |
| (1) | 2-Channel Level Controller. |
| (1) | pH Alarm Horn with Mute PB. |
| (4) | Pilot lights for:
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