Using suction lance assemblies combined with the chemical containers being placed in the bunded area of the enclosure , which in turn is located behind a transparent cover plate - ensures that chemical handling risks are minimised where possible .
Changing the chemical container once the chemical has been used is simple , as the suction lance assembly can easily be lifted out from the empty vessel , and placed into the new vessel once it ’ s securely positioned into the bund .
As well as assisting in the handling of the chemical reagents , each suction lance assembly includes an integral non-return valve to help ensure that the pump remains primed .
Air Operated Diaphragm Transfer Pump
As the customers ’ effluent is collected in a sump arrangement located underneath the water treatment system , it has to be transferred to the dosing tank for pH correction .
Contained within an enclosure , complete with a front mounted transparent cover are two double diaphragm pneumatic pumps which are ideal for the job . With wetted parts in polypropylene and PTFE the double diaphragm pneumatic pumps are resistant to the chemistry used in the customer ’ s processes .
The control panel controls two solenoid valves which in turn control the air flow to the pumps , allowing them to be automatically turned on , based on the incoming signal from sump mounted float switches . The double diaphragm pneumatic pumps are arranged in a duty and assist formation , with the assist pump being switched on when the customer ’ s processes generate enough waste water to require the addition of the second transfer pump .
The air operated double diaphragm pumps used were the AWE models PP50 ’ s with 1 / 4 ” outlets and maximum flow rates of 50 Litres / Minute .
There are many advantages that are available when using an air operated double diaphragm pump to transfer waste water , effluent or even chemical reagents . They offer exceptional flow rates which can be easily adjusted by using an air regulating valve . In addition - with relatively simple construction , the diaphragm can be easily
removed and cleaned for periodic maintenance , and they are of simple design and proven construction meaning that there really is very little to go wrong with them .
pH Neutralisation System Commissioning
Following the customer briefing and the approval of the designs , the process of completing the fabrications , assembly and control panel build were completed within 6 weeks . As the plant was designed to be skid mounted , loading on to a flat bed truck for same day delivery , and then positioning the pH neutralisation system to it ’ s site location was a relatively simple procedure .
From the customers perspective , once the inlet and discharge pipework were connected , power brought onto the system - the pH neutralisation was ready for commissioning .
The commissioning of the pH neutralisation system was completed by two of the AWE Ltd Service Engineers within 7 weeks of receiving the order from the customer .
If you would like more information on water treatment , or if you need a permanent or temporary waste water treatment solution , then please don ’ t hesitate to get in touch by calling AWE Ltd .
Telephone : + 44 ( 0 ) 1785 254 597 Visit : www . awe-ltd . co . uk
2nd & 3rd MARCH 2022 NEC , Birmingham twitter : @ surfaceworldmag APRIL 2021
49