Progressive cavity pump
Cavity pumps, also known as PCP (of English. Progressing cavity pump), are pumps for pumping a variety of media, particularly thick, highly viscous and abrasive media such as sludge, slurry, oil and fats. According to its inventor, René Moineau it is also referred to as a Moineau pump, as it is according to the trademarks of the original licensee also called Mohno, Moyno or mono pump.
- 2.7.1 Paint and Coating Industry
- 2.7.2 Pulp Industry
- 2.7.3 Automotive Industry
- 2.7.4 papermaking
- 2.7.5 Crude oil production
- 2.7.6 Agriculture
- 2.7.7 shipbuilding
- 2.7.8 construction
- 2.7.9 dosing
Operation
The eccentric screw pump belongs to the family of rotary positive displacement pumps. The main parts are a rotating part, the rotor, and a stationary, the stator, in which the former is rotationally moved. The rotor is designed as a kind of round threaded screw with extremely large pitch, large junction depth and small core diameter. The elastic stator has a thread more and twice the pitch length of the rotor. This stay between the stator and which is rotating and additionally radially moving rotor pumping chambers that move continuously from the inlet to the outlet side. Valves to limit the delivery chambers are not required.
The size of the pumping chambers and thus the theoretical flow rate depends on the pump size. A 360 ° rotation with free discharge, the volumetric displacement per revolution. The pump flow rate can therefore vary over the speed. The actual flow is from the self-adjusting back pressure dependent. The media is always trying to achieve a pressure balance from high to low pressure. Since the seal between rotor and stator is not static, medium will always flow from the pressure to the suction side. This " slip losses " are reflected in the characteristic difference between the theoretical and the actual flow rate. Sets when you set the maximum permissible levels of pressure to 6 bar and used twelve-stage conveying elements, pressures up to 72 bar can be overcome.
The shape of the cavities is constant, so that the pumped fluid is not compressed. If a suitable interpretation not only fluids but also solids can be promoted with progressive cavity pumps. The shearing forces which act on the material being conveyed, as well are very small, so that, for example, all the fruits can be promoted. A particular advantage is that promote progressive cavity pumps continuously and pulsation, this makes them suitable for use in Vergussanlagen. Even highly viscous and abrasive media can be conveyed easily. They are also suitable as a pump with round plates at the end fittings for emptying barrels.
Inventor of this pump technology is the Frenchman René Moineau (1887-1948), who registered his invention for a patent in 1930 and 1932 with Robert Bienaimé the pump manufacturer PCM Pompe founded and also licenses awarded worldwide. The technique of progressive cavity pumps was also a part of his dissertation in 1939.
Scope
With the progressing cavity pump a wide variety of media can be conveyed gently and pulsation. The spectrum of the media ranging from the water up to no more fluid media by itself. Since the flow rate is proportional to the speed, can be very well used to the dosing cavity pump in conjunction with an appropriate measuring and control technology.
The Exzenterschneckenpumpensystem combines many positive attributes of other pump systems: As the centrifugal pump has no suction and discharge valves. As the piston pump has an excellent Self priming. As the diaphragm or peristaltic pump they can promote any kind of inhomogeneous and abrasive media, mixed with solids and fibrous materials. Multiphase mixtures are also encouraged safe and scho Sartorius membranes of the progressing cavity pump. As the gear or screw pump is able to handle high viscosities of the medium. And as the piston, diaphragm, gear or screw pump, it has a speed-dependent, continuous flow and is thus in a position to fulfill dosing.
The progressing cavity pump can be used in all industrial areas where special promotional tasks to be solved.
Environmental
In environmental cavity pumps are mainly used in water treatment plants. The following performance is to show the diversity of application possibilities.
Municipal wastewater treatment plants
- Pumping of raw sewage, septic sludge, sludge, return sludge, raw sludge, digested sludge
- Loading of centrifuges, decanters, belt presses, chamber and membrane chamber filter presses
- Dosage of milk of lime, flocculant, Flockungsmittelkonzentrat, flocculant, ferric chloride
Industrial wastewater treatment plants
- Promotion of industrial waste water: sludge from neutralization, FGD wastewater, gypsum suspension, charcoal suspension, metal hydroxide sludge, acid sludge, oil suspension ( from grease traps ).
- Dosage of coagulant, flocculant, lime, acid, alkali
- Waste disposal and recycling facilities
- Promotion of landfill leachate, fat and oil emulsion, solvent mixtures, centrifuge sludge from nuclear power plants, radioactive mud, tar residues ( TÖF ), mixed sludge
- Dosage of flocculant, acid, alkali, ammonia water, lime water, the metal salt solution used oil for burning, thick sludge drying and incineration
Drinking water treatment plants
- Promotion of calcium carbonate mud, lime, flocculants, flocculant, iron -manganese mud, river mud, dewatered sludge from filter presses
Civil Protection
- Production of oil, sludge, oil -water emulsion, sewage, solvent mixture, mixture of chemicals
Food industry
In the food industry, high-viscosity media, such as syrup, cheese, yogurt and ketchup are pumped into the low-germ various processing stages. When Rahmförderung the pumps run very slowly, so as not inadvertently butter produced during pumping. Progressing cavity pumps for the food industry to be built according to the relevant regulations and standards. You are CIP - cleanable and SIP sterilizable (without disassemble ). Here are a few examples of the wide range of funding opportunities in the progressive cavity pump
Bakeries
Conveyance of baking aids, egg mass, fat, yeast, dough, wholemeal
Meat factories
Transporting blood sausage meat, corned beef, meat paste, foie gras, goulash soup, pickle, lard
Fruit and vegetable processing and canning industry
Conveyance of applesauce, vinegar, fruit, vegetable mash, Kartoffelreibsel, fruit pomace, olive paste, pectin, syrup, cooking oil, tomato paste
Manufacture of butter and cheese
Pumping of: butter, clarified butter, curd, cooked cheese, herb butter, cream, raw milk
Milk processing
Conveyance of butter milk, fruit blend, yogurt, kefir, milk drinks, cottage cheese, cream
In Süßmostereien and beverage production
- Pumping of mash and pulp, raw, fruit, vegetable and fruit juice, nectar, whole stone fruit, frozen and crushed fruits, sugar solution, syrup, concentrate, reason, colors and flavorings and carbonated end products
- Removal of Trockenstoffaustrags from filtration plants through pipelines
- Feeding washing water in the fruit cleaning
Pasta production
Conveying of egg, egg yolk, fat, liquid egg noodle filling compound, dough, fruit fillings, nut and almond fillings
Beer and Malt
- Conveyance of undiluted grains, in addition dehydrated grains, mash, wet shot, spice, yeast ( any kind ), hot break, decanted Trub, Kieselgurdickschlamm from the filters, beer in each generation stage, wash water with pieces of paper, Etikettenleim, caustic soda, lime for water treatment and wastewater
- Serving machinery and equipment for solid-liquid separation such as centrifuges, filter presses and separators
- Removal of the resulting dry material through pipelines
- Use for automatic Hefedosierung
- Use as Bierverschneidungspumpen
Chocolate and confectionery
Delivering ice cream, fondant, gelatin, glucose, cocoa paste, marzipan, nut paste, chocolate and wafer filling.
In viticulture and wineries
- Promote without bouquet and CO2 loss of whole grapes, with stalks, cider, Trubwein, mash, mash vorentsafteter, yeast and wine
- Feed of plant and machinery for solid-liquid separation, such as centrifuges, continuous presses and separators
- Removal of the pomace or dry substance
Chemical Industry
In the chemical industry a wide range of chemical raw materials, semi - finished products and be encouraged. Again, the interpretation of the progressing cavity pump is performed based on the fluids properties, it often need additional safety regulations (eg hazardous area ) are observed. Progressive cavity pumps are more aggressive for safe conveying and dosing, highly viscous and abrasive products. The basic requirement is absolute certainty whether in the field of basic chemicals, cosmetics or pharmaceuticals, plastics manufacture, as well as in the paint and coatings production. Harmful and hazardous substances, highly viscous, fibrous or sensitive materials require pumps that promote critical media in hermetically sealed systems. But They should make no compromises on safety. Therefore encourage and dosing cavity pumps in the chemical industry safely, gently and economically.
Paint and coatings industry
Progressive cavity pumps are used for pumping of emulsion paint, printing ink, water-based paint, filler, rotary printing ink, solvent, synthetic resin paint, etc..
Pulp industry
Progressive cavity pumps are used for pumping fiber suspensions, such as wood pulp, sulfate, sulfite, rags and burp cloth, wet broke, linters, kaolin, coating pastes in the treatment plant or to feed the coating machine, starch, glue and paste, latex, Kalkschleim, stearate, alum, melamine, urea formaldehyde as chemicals used.
Automotive industry
Progressive cavity pumps are suitable for pumping and metering of: underbody protection, sealant, adhesive, wax, oil, grease, paint and varnish, paraffin.
Papermaking
- Uses for eccentric screw pumps, it is in many fields of papermaking.
- Use in preparation of waste paper for the transport of waste paper stock to its further processing
- Use in deinking plants
- Promotion of coating colors for commissioned work, coating kaolin, titanium dioxide, satin white, calcium carbonate, kaolin, bentonite, latex, Acronal.RTM, stearate, PVA, starch, starch, Neutralleim, retention agents, defoamers, optical brighteners, synthetic thickeners, wet strength agents, dyes, caustic soda, Basoplast, alum, water glass, dispersant.
Oil production
If the use of conventional rod deep well pump does not seem appropriate, even progressive cavity pumps are used in the production of oil. These are either driven from the surface by means of a drive head and a screw- rod or driven by a directly seated on the eccentric screw submersible electric motor.
In a reversal of the principle of progressive cavity pumps are used as underground drives in drilling. The drive unit is mounted immediately above the drill bit. It is driven via the flushing liquid which is fed through the riser pipe to the drill bit. The use of Exzenterschneckenantrieben directly above the drill bit enables flexible management of the bore and thus the realization of directional drilling.
In general, progressive cavity pumps are suitable for the production of crude oil, oil sludge, petroleum, fuel oil, paraffin, dirt, oil, as transfer pumps for crude oil loading and unloading pumps for tank farms, oil sludge pumps for suction from reservoirs. They are used as feed pumps for filling stations or centrifuges.
Agriculture
In agriculture, progressive cavity pumps are installed as slurry feed pumps for stationary use as well as for mobile use in slurry tanks. Promotion of manure, biomass, Brüdenwasser, wastewater bioreactors, Thickened sludge, pig feed, molasses, oil, grease.
Shipbuilding
Promotion of bilge water, septic sludge, machine oil, waste oil.
Building industry
Conveying of cement slurry, bentonite grout, spray plaster.
Dosing
Dispenser on the basis of progressive cavity pumps are used for dispensing adhesives, silicones, sealants and many other media. Even the smallest dosage amounts from about 0.005 ml are already possible. Because of the proportionality of oil flow and angle of rotation cavity pumps are very suitable as dosing pumps in the packaging sector.