Pumps for tanks cleaning

Suction and cleaning sludge wastewater.

Application: suction and cleaning of tanks containing aluminum processing sludge. In this company, aluminum semi-finished products are produced in three phases: starting from casting to obtaining billets, then many operations are carried out to obtain profiles of various shapes, and finally surface finishing steps are completed with anodization and painting of metal semi-finished product. These operations generate wastewater characterized by chemical aggressiveness and a charge of abrasive metal suspensions. The fluids are collected in tanks and the formation of sludge deriving from the heavy solid suspension precipitation to bottom of tank.

peristaltic pumps for suction and cleaning tanks arising form processing waste

The tanks cleaning operations and the removal of wastewater are performed by submersible centrifugal pumps, but, as is often happens, the formation of thickeners creates large problems of blockage of submersible pumps making them inefficient. Normally an operator goes down into the tank in order to improve the sludge evacuation process through fluidification operations for the sediment homogenization.

This is big problem because during the emptying operations, the operator works immersed in the fluid mass at the same time as the electric pumps running. The potential risk for the operator is clearly evident (electric shock).

Safety and peristaltic pumps in tanks cleaning operations

It was proposed for the task solution , a self priming peristaltic pump hcp 40 complete with speed variator, due this, machine is perfectly adapted to variable viscosity of the sludge, The pump perform a very high suction capacity and completely isolates the operator from a potential electric shock. Insensitive to dry running, the peristaltic pump does not suffer damage resulting from the discontinuity of liquid inflow, moreover, the resistance to abrasion and chemical aggression is assured by the hose membrane perfectly compatible with the fluid. The absolute safety is guaranteed by the fact that the pump operates on the surface by introducing the only suction pipe moving it in the various points of tanks to obtain a perfect cleaning, as it would happen with a vacuum cleaner. No physical contact between mechanical or electrical parts of the pump with the pumped fluid prevents any risk.

More information on pumps: Hose Carrier HCP 40

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11 February 201715 January 2018

Hydrochloric acid

The purpose of the application: hydrochloric acid and Aluminum anodizing.

hydrochloric acid metering pump This company deal with surface treatments, and there is a lot to do with an annual production of about 7000 tons of Aluminum. The quality of the finishes has distinguished this company in the market, making it among the most important companies in Italy in this sector. Evidently to reach this important goal, it is necessary to pay particular attention to all production processes, and especially those in the preliminary analysis, and control, before each processing step.

The hydrochloric acid is widely used to perform the repeated chemical controls necessary to achieve a process of high quality finish that the company shall ensure. The sampling is done by drawing directly from the baths the liquid to test, and subject it to various chemical controls. For dosing hydrochloric acid is used, a peristaltic pump HC 10 low pressure pump, with a fixed rotation speed, and particularly slow, in order to obtain a tubular membrane long lasting time.

Ease to use, high reliability in the priming, and the absolute compatibility with the hydrochloric acid, allow this little HC 10 peristaltic pump to make its important contribution in order to achieve the high quality standards desired by the company in the production processes.

The HC 10 is a small proportions peristaltic pump, but very sturdy and accurate, easy to use, does not suffer damage in case of dry running and is capable of developing a vacuum of 8 meters. Provides a instant and continuous self-priming effect. The tube membrane is compatible with a very broad spectrum of aggressive chemicals, its replacement is quick and simple and requires no special skills. Given the obvious talents shown by the first peristaltic pump, the customer introduced a second unit as a complement to the first.

For more information on the pump : Hose Carrier HC 10

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6 December 201615 January 2018

Pumps Hose Carrier for suction wastewater and sludge of metal surfaces finishing process

Aspiration of varnishing sludge.

An HCP 50 peristaltic pump is responsible for suction and transfer of sludge generated by the process of regeneration of cylinders for compressed gas in a company forming part of a large industrial group, specialized in the production and trade of gas cylinders and cylinders packs for industrial use.
One of these companies in the group, takes care of the recovery and regeneration and varnishing of cylinders.

Between the processing steps is expected: the washing and the remediation of the cylinders, blasting the body, the pre-treatment operations and the final finishing with the final varnishing of the product, often with custom colors. This company works thousands of cylinders each year,in steel,aluminum,with accessories or without.

The perfect pump solution for varnishing sludge:

The HCP 50 used is a medium proportions peristaltic pump ,and must recover and transfer waste water and sludge liquids deriving from the manufacturing process. Starting from the first for arrive to last working step, the variety of liquids pumped is very wide, as well as the viscosity, but the presence of the speed variator allows to the pump a perfect adaptation to different tasks. In the wastewater there are aggressive substances, solid suspensions,residual abrasive sand, various agglomerates, there is everything, in liquid form or muddy.

The machine that can do all this work is only one, the HCP 50 peristaltic pump. With a free passage up to 50 mm in diameter, the machine performs its function in all phases, from 2007, the year which it has planted into service. It should be added that in the dead times, or when it is necessary, should also drain the varnishing sludge from the cabins tanks. The customer buy a tubular membrane spare approximately every two years. The pump goes hand in hand to various operators for their service, without problems, while always ensuring a ready effective operation, removing sludge ,at low cost.

More information on the pump : Hose Carrier HCP 5.0

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28 July 201615 January 2018

Suction floating sludge and supernatants from coolants.

Remove supernatants and floating sludge.

Purpose of application, floating sludge and supernatant suction. A company specialized in the manufacturing of stainless steel makes use during the working processes of cooling lubricant that is collected in an underground tank. The cooling lubricant is constantly subjected to cleaning cycles and regeneration in order to eliminate the contaminants collected during use in the manufacturing processes. The perfect cleaning of the cooling lubricant is necessary in order to obtain levels of surface finishing of metal products according to the standards demanded by the manufacturer. In many cases, the metal surfaces are finished with mirror polishing.
One of the various problems linked to the treatment of lubrofrigerante is the elimination of the supernatant and floating sludge or any agglomerated formations that form and stationed on the free surface in the tanks, the semisolid consistency of these formations puts in crisis the treatment plant of the cooling lubricant clogs pumps and valve systems.
It is advisable to remove the formations supernatants possibly in the moment of maximum consistency and directly from the surface of the liquid in order to be able to eliminate the most contaminated.
For this purpose have been arranged a Pump Hose Carrier HCP 2.5 equipped with a special filter Skimmer equipped with an overflow of collection able to float on the surface of the fluid.
During the cleaning step, the spillway is located a few millimeters below the free surface and collects in its interior the supernatants and the floating sludges substances that precipitate due to gravity, the action of the pump removes these substances evacuandole externally in a bag filter.
The Pump Hose Carrier is a machine perfectly suited to this purpose just for its remarkable suction capacity and the possibility of operating with solid substances of considerable size. No one of different kind of pumps previous used have enabled that company to achieve the efficiency of the Pump Hose Carrier. Since four years that the HCP pump 2.5 performs this service, and it has not requested any maintenance intervention , the tubular membrane is still that of first installation. We do not think it is necessary to add other things.

More information on Hose Carrier HCP 2.5 pump

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10 June 201615 January 2018

Pumps Hose Carrier and sewage electroplating sludge.

The object of application: Aspiration from tanks of wastewater with suspensions resulting from electroplating and galvanic processes.

The company has the need to aspirate from underground tanks various wastewaters arising from their production process. These fluids in addition to maintaining a variable chemical aggressiveness (but always consistent), are also characterized by the presence of metallic particles accumulated during the various manufacturing processes. In the past were used pumps of various types, centrifuges, pneumatic membrane also submersibles. No pump previously used, has never solved the problem. For one reason or another, when you had the need to pump out some decanting, the pump designed was broken, does not prime, clog, worked well until the time but not now. It should be keep in mind that the nature of the fluid, as well as corrosive due to presence chemicals necessary to pre-treatment, also has the metal micro deposits.During the electroplating operation , the preparation of the products to be treated also provides cleaning cycles with acids and alkalines fluids that serve to improve the quality of the galvanic final treatment. In these baths that focuses a good part of the metallic particles. The combination of chemical corrosion and metal abrasion , creates a wastewater mix very damaging for the pumps, see why:

centrifugal pumps have their weak point in the system hydraulic sealing, constituted by the mechanical seal or rubber rings. The sealing system is resistant to chemical corrosion, but not against abrasion. After indefinitely time, but always too short the sealing system yields and the pump fluid releases can attack components not protected against contact of electroplating aggressive liquids.

The centrifugal pump as well, must be used below the level of the liquid to run correctly, poorly adaptations of a general service centrifugal pump is not a good choice. Also is not suitable for fluids transfer of high viscosity media as sludge is.

But the sludge is generated, and must be removed in some way. The centrifugal pumps exist also in version self-priming, and are much more suitable to treat galvanic wastewater with suspensions or slurries dissolved.

The times of priming of a self-priming pump are long sometimes up to 15-20 minutes, if the pump takes air suction for some unfortunate reason, the pump must be re-primed, with consequent waste of time. When the levels in the tanks are minimal this phenomenon is guaranteed.

The centrifugal pumps run fast (2800 revolutions per minute) the sealing organs responsible to the barrier of the liquid, suffer for this reason, a strong abrasion occur due to the action of the rotation speed mixed to presence of particulate abrasive metal. In a relatively short time the pump loses its suction capacity and it will be necessary to set in on maintenance of the pump. The pump must be completely removed to replace the sealing device, often this type of intervention is carried out by specific repairers in external workshops, this operation is not economically insignificant.

Let us come to the double diaphragms pneumatic pumps , cost perhaps less than all of the other, but beware, if you accept the cost of compressed air handling (considerable on balance).

The limited cost of purchase in relation to other pumps, attracts a lot. Diaphragm Pumps work quite well, better of centrifuges.

The limit in these pumps consists in the fact that there is a valves system to operate, especially in the suction phase and priming, all work fine in the presence of normal fluids. The situation changes in presence of wastewater with solids. The valve system no longer provides a linear operation, when the valve does not work in a perfect way the pump loses the ability to prime and must be re-primed again. Are rather noisy even if this is a problem. The real problem is absence of preventive maintenance, when diaphragm breaks, the the galvanic aggressive fluids spill out into the distribution system creating damage such as to have to replace it completely.

A solution for electroplating and galvanic wastewater, the peristaltic pump Hose Carrier.

A few years ago that company purchased a HCP 35 peristaltic pump, always in use, without too many concerns , even for reasons different from original needs . Once every year and a half, one tubular membrane is purchased and replaced internally at low costs.

More information on the Pump Hose Carrier HCP 35

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