TL-131

 

Vertical sump pumps move laboratory

wastes from building corner tanks to a

collection tank. Lab wastes are blended

with other plant process wastes before

treatment and discharge.

Two Vanton polypropylene vertical

centrifugal sump pumps move laboratory

wastes from building corner tanks to a

collection tank. Lab wastes are blended

with other plant process wastes before

treatment and discharge. Each sump tank

is equipped with a multi-point level

controller in a NEMA 4X enclosure (epoxy

coated), with 4 control points that are

field adjustable. Leak detector probes

sense any liquid between the double

walls and energize an audible alarm and

warning light.

Eliminating Underground

Waste Lines

INDUSTRY:

ENTITY:

SOLUTION(S) PUMPED:

PUMP TYPE(S):

Chemical

Nalco Chemical Co.

Wastewater

Nonmetallic Tank Pump Systems

 

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Reprinted from Chemical Processing

Les Owens, Facilities Engineer, Nalco Chemical Co., Garyville, LA

John McCallion, Senior Technical Editor

 

Non-metallic collection system ends

underground waste lines

Corrosion rebuffed, environment protected

 

To eliminate any possibility of soil or groundwater contamination, Nalco

Chemical Co. moved all waste handling lines aboveground at its

Garyville, LA, plant in 1993. A new, all-plastic drain system for the

5,000-sq ft, on-site laboratory was an important element of the change.

Since installation, the corrosion-resistant tank and pumping lab-waste

handling system has operated trouble-free.

Chemical compatibility

Nalco is the world's largest marketer of specialty chemicals for water,

process and wastewater treatment. Most of the products made at the

Garyville plant are organic chemicals.

The plant's on-site lab deals with fluids such as acids, bases, standard

oxidizing and reducing chemicals and organic liquids. It also analyzes

and disposes of small amounts of some 200 different raw materials and

120 products made at the plant.

An all-plastic tank and pumping system was chosen to handle the lab

wastes. Each wall of the lab has two large sinks, and there is an island

with two sinks in the center of the lab. Polypropylene was used

throughout the system, due to its ability to withstand all of the

chemicals encountered at the plant.

To accumulate and handle the wastewater, four 200-gal, aboveground

polypropylene tanks were installed outside the building, one at each

comer. The tanks are of double-wall construction, with a 2-in gap

between the walls for leak detection.

A detection probe located between the side walls reaches into the

bottom tank area. If any liquid should enter the gap between the walls,

the probe senses it and triggers audible and visible alarms, permitting

corrective action to be taken before the outside tank wall leaks.

Each of the outside tanks is equipped with two vertical, solid

polypropylene pumps, sized to handle either 4 gpm or 10 gpm at 20 ft

of head, depending on the requirements of the particular tank. Pump

casing and impeller, pipe fittings and all wetted parts are made of

polypropylene; and the pump shaft is plastic sleeved to prevent

corrosion.

The sinks at the center island drain into a 39-gal polypropylene tank,

which is 14-in high, enabling it to fit under the sinks. Two flexible-liner,

peristaltic pumps move wastes from the center tank via an overhead

line to one of the outside tanks.

The flexible-liner pumps are self-priming, so there is no concern about

developing an airlock in the center-sink system. Casings are

polypropylene and the flexible liners are made of NordelĀ®, a

chemical-resistant synthetic rubber made by DuPont Co.

All five of the building's waste tanks are equipped with capacitance

probes that provide multipoint level control in each tank. The control

system is set up so that pumps operate alternately to provide even

service and wear. If the tank level rises above a certain level, both

pumps operate.

Waste from the corner tanks is pumped to a plant collection tank, where

it is blended with process wastes and treated in an advanced

bio-oxidation plant located on-site. The lab-waste handling system has

performed trouble-free since it was installed in 1993.

Polypropylene tank, 32" x 20" x 14" high

equipped with Vanton close coupled,

self-priming sealless, duplex flexible

liner pumps which move wastes via

overhead line from center island sinks

to outside wall, where they combine with

other lab wastes. Pump bodies are

polypropylene; flexible liners are made

of Dupont Nordel.

Copyright 2016 - Vanton Pumps (Europe) Ltd - All rights reserved

About Us

In the 1950, Vanton developed a revolutionary all-plastic pump for use in conjunction with the first heart-lung device. The design limited fluid contact to only two non-metallic parts: a plastic body block and a flexible liner. This was the birth of our Flex-I-Liner rotary pump. Its self-priming sealless design made it an industry standard for the handling of corrosive, abrasive and viscous fluids as well as those that must be transferred without contaminating the product. Vanton now offers the most comprehensive line of thermoplastic pumps in the industry.

 

 

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Vanton Pumps (Europe) Ltd.

Unit 4, Royle Park

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Congleton CW12 1JJ

UNITED KINGDOM

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