What Are the Common Types of Slurry Pumps and How to Choose?
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There are many types and models of slurry pumps on the market. Which of the many types of slurry pumps is more suitable for your needs? This article will discuss the types of slurry pumps and recommendations for choosing a slurry pump. Please be patient with this article!
A slurry pump is a type of pump designed for pumping liquid containing solid particles. Slurry pumps change in design and construction to adjust to multiple types of slurry which varies in the concentration of solids, size of solid particles, the shape of solid particles, and composition of the solution.
When the position of the pump shaft is parallel to the horizontal plane, it is called Horizontal Slurry Pump. The horizontal slurry pump is a single-stage single-suction axial suction cantilever horizontal centrifugal pump with high-strength and wear-resistant materials for the over-flow parts. according to the different suction media, the filter components of various materials can be exchanged.
A horizontal slurry pump is suitable for conveying strong abrasion, high concentration, corrosive large or fine particle slurry, this series of slurry pumps can be widely used in metallurgy, mining, electric power, coal mine, and other industries to transport abrasive slurry containing a large number of solid materials.
When the position of the pump shaft is perpendicular to the horizontal plane, it is called a Vertical Slurry Pump. Generally, the vertical slurry pump is used in the slurry pool to pump the slurry, and the pump head should be placed below the liquid level, so it is also called the Submerged Slurry Pump, but not all the whole pumps are submerged in the water. if the motor and other non-pump head components are also put into the slurry, the pump is called Submersible Slurry Pump.
A vertical slurry pump is mainly suitable for conveying corrosive, coarse particles and high concentration slurry.
The Submerged Slurry Pump is a vertical single-stage single-suction cantilever centrifugal pump, the impeller is a semi-open impeller, and a mixing blade is arranged at the suction edge extension of the impeller.
The main features of the submerged slurry pump are that the length of the pump shaft in the submerged part is between 800-2000mm, there is no bearing between the impeller and the pump shell, the driving unit is installed on the motor support, and support seat by the vertical motor, and the coupling is used to connect with the pump.
A submerged slurry pump is mainly used in municipal engineering, paper mills, cement plants, printing and dyeing plants, and other industries to pump slurry, quicksand, sludge, and other fluids.
The submersible Slurry Pump is the coaxial integration of the pump and the motor, and the motor submerges into the slurry. There is no need to build complex fixtures and protective measures on the ground. The motor is protected by the mechanical seal, which can effectively prevent high-pressure water and impurities from entering the motor cavity. The stirring impeller touches the deposition surface directly, the slurry concentration is controlled by the diving depth, and the slurry automatically pours into the pump to save energy.
Submersible slurry pump is suitable for conveying slurry containing abrasive particles such as sand, cinder, tailings, etc., mainly used in metallurgy, electric power, river dredging, sand extraction, municipal mud process, and other industries.
The type of mud pump purchased for the use environment of each industry is different, and it should be selected according to the specific situation. If you really don’t know how to choose, you can also consult the customer service of Quanyi Pump Industry. In addition to the use environment, there is another important factor. , that is the selection design of the mud pump, which is related to the normal operation of the mud pump and the normal maintenance of the accessories;
1. Application field, operating environment, does the mud pump need to transport corrosive slurry? solid particle size
2. Are there specific requirements for the mud pump, flow rate, head and power when designing the project?
3. Is the area where the mud pump needs to be installed, whether it is outdoor or indoor, is the temperature freezing in winter?
Slurry pump selection and operation can vary based on various factors on site. This is a complex task because balancing the pumps available on the market is very difficult. However, try to consider the flow, pressure, viscosity, abrasiveness, particle size and particle type of the slurry you are dealing with. If you need more help, an application engineer should help you consider these factors to help you find the best pump for your project.
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Suggestions for a 15% clay solids / 85% water slurry pump
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MVPs
(Mechanical)
(OP)
22 Apr 10 16:09I am looking to see if anyone has any experience and guidance regarding what type of pump to consider for moving about 10 USGPM of a luke-warm water / clay solids "milkshake" slurry (15% solids, 2-50 microns) at a differential head of about 150 ft.I am thinking maybe a small progressive cavity pump or wobbler pump with a viton stator and 1 bhp motor (I am told to also consider a hydraulic drive but...for 1 bhp...why?) from Moyno, Seepex, Allweiler or Roper.I searched previous threads and I think the direction was similar for a slightly different (submerged) application, which oddly enough was also described as a "milkshake". In fact, in a sample jar containing what I am trying to pump, when you shake it it ends up looking just like Nestle's Quick, although it doesn't taste nearly as good.Since this is for a little pilot skid with a short life expectancy, I could even consider a little Grundfos CR1 and just live with it wearing out...Anyone have any thoughts?Thanks in advance...
Regards,
SNORGY.
(Mechanical)
22 Apr 10 16:4415 % solids is not that much but don't use a rotating positive displacement pump. Wear will be too high with this kind of slurry unless you oversize the pump (low rpm). Perhaps a small rubber lined centrifugal can do it although the viscosity seems to be rather high. For sure a diaphragm (membrane) pump can easily do it and wear won't be that high. If you have compressed air availabe and as this is not a 24/7 operation, look for an AOD. Otherwise (no compressed air available) look for an electromechanically driven diaphragm pump. Forget the hydraulic drive. That does not make sense for 10 GPM and 150 ft.
(Mechanical)
22 Apr 10 17:56Although a AOD sounds a good selection - but can it generate the head?
As this is only a pilot scheme you could consider a small ANSI or similar process pump with a duplex SS impeller, this will give reasonable life.
(Mechanical)
(OP)
22 Apr 10 18:02Thanks micalbrch.There would be air - and pressurized nitrogen - available, but the client prefers to stay away from that. I don't know much about the electromechanical driven diaphragm pump, but from what I could find out, it's a good option. One of my initial thoughts had in fact been a Sandpiper pump, but I ruled it out due to client's reluctance to use pneumatically driven pumps.I also looked at DiscFlo, but I thought that it would be inefficient at low viscosity - 50 cP and lower - and the fine nature of the slurry didn't warrant it. Another option I thought about was Wanner HydraCell. I am thinking that, for what I am trying to accomplish, that's a bit too much pump and too much pump technology for this application.I just don't want to send out a generic request for quote and get a whole bunch of declined bids, thereby wasting everyone's time.With respect to the hydraulic drive, there would be several similar (mostly smaller) slurry pumps on this package, moving the same stuff at different rates. I envisaged an electric-driven hydraulic supply pump (could even be a hydrostatic drive / swashplate type) and a maze of tubing (or hoses) and valves to route to the various hydraulic motors, and decided that I didn't prefer such a scheme when compared with half a dozen small motors.
SHANGLISHI supply professional and honest service.
Regards,
SNORGY.
(Mechanical)
(OP)
22 Apr 10 18:03Artisi - thanks also.That's in keeping with my "buy a little Grundfos and accept that I am going to wreck it" philosophy...
Regards,
SNORGY.
(Mechanical)
22 Apr 10 18:26I think a "grundfos" wouldn't go the distance, the impellers on most of these small units are usually pressed SS sheet - and wouldn't be suitable.
Years back I had a client who unbeknown to myself until much later put one of our ANSI process pumps(CI case, Cd4mcu impeller - 2900rpm) on a china clay filter-press application, this application meant it was running at near to CV for hrs on end maintaining pressure to the filter. The wear life was unbelievable considering the application.
(Mechanical)
22 Apr 10 20:31You may want to consider a plunger pump. I've known of them to be used for pumping ash & water slurries with good durability. I'm not sure of the availability of such pumps in this small size range.
Valuable advice from a professor many years ago: First, design for graceful failure. Everything we build will eventually fail, so we must strive to avoid injuries or secondary damage when that failure occurs. Only then can practicality and economics be properly considered.
(Industrial)
22 Apr 10 22:52I tend to agree with staying away from any type of positive displacement pump. I do agree with micalbrch in that any centrifugal pump, it would be best to buy a slightly overized one and then lower the rpm.However, if you need specific amounts of liquid, it is cheaper to buy a PD pump, rather than a centrifugal with an associated flow control valve(in MOST cases.
Will Chevron Corp.
(Mechanical)
(OP)
23 Apr 10 09:37Some of these pumps will be driven via VFD...I agree with the assessments re: Grundfos...It's not easy to source "readily available" minute little pumps for a service like this.Sounds like a mechanically driven diaphragm pump might be the best fit.The service life will be measured in terms of months, not years, and the pilot that they are going into is intended to test (hopefully prove) a process technology. I don't mind chewing up a few wetted ends during the exercise. I am inclined to try Hydracell and / or PC pumps with spare wetted ends, depending on whatever sparing philosophy the client chooses to adopt.Thanks for your advice, everyone...it has helped (and continues to help) a lot. It's good to bounce things off you folks.
Regards,
SNORGY.
(Civil/Environmental)
23 Apr 10 09:57Look at a Watson-Marlow SPX-32, 10 GPM @ 100 PSISteve
(Mechanical)
(OP)
23 Apr 10 14:27Thanks all, and stars all around (am I allowed to do that? I just did...)SteveWag:I like this concept at first glance, and I will be looking into it in further depth.
Regards,
SNORGY.
(Mechanical)
23 Apr 10 21:07Here is a company that made their name pumping slurries.rmw
(Mechanical)
(OP)
24 Apr 10 11:04Thanks rmw...It's been too long that I have "dabbled in everything". I should have thought of these guys.
Regards,
SNORGY.
(Mechanical)
25 Apr 10 18:16I'd look at a progressing cavity pump; that's what pretty much every paper mill uses for their clay pumps, and they seem happy with them. Keep the speed to 200 rpm or less, and you'll see good life out of it.
(Chemical)
26 Apr 10 07:34150 ft is a bit too much head, but you might consider an industrial hose pump. Barring that, an air operated diaphragm. A low flow, high head application like that is probably going to be the death of your typical slurry pump in short order.
(Mechanical)
(OP)
26 Apr 10 09:47Thanks folks.These will be sacrificial pumps with a short life expectancy in a non-dangerous service. If I can find a small enough slurry pump I'll go that route, otherwise probably a PC and a whole bunch of stators.
Regards,
SNORGY.
(Mechanical)
29 Apr 10 02:53I would be using a progressive cavity pump from Mono Pumps Australia. They make them with ceramic coated wetted components for slurry duties. Your slurry is just dirty water.As for sizing it is more appropriate to have them run slow to make them last. it is not oversizing, just good engineering. Too many "Johnny come latelies" have been flogging their UNDER sized PG pumps into the market. They sell you a fast running small size frame and make a killing on the spare parts.When I specify PG pumps I always include a five year no fault warranty clause. This keeps the dodgy salesman out of the arena and I end up with a decent engineering solution.I have seen Mono Australia pumps in action for nigh on 30 years in a large scale sewage facility for Sydney Water. they pump everything including the kitchen sink.I have also used them for mine dewatering pumping tailings and coal debris.
(Mechanical)
(OP)
29 Apr 10 20:42I will advise the outcome as things progress...We will try to get proper centrifugal slurry pumps if we can get them that small.
Regards,
SNORGY.
(Mechanical)
30 Apr 10 06:07If pump life is not all that important and you are only looking for a short-life and a small "slurry" is not available I would seriously consider an ANSI or similar pump with hard SS impeller ie CD4Mcu or similar.
(Mechanical)
(OP)
30 Apr 10 09:26Artisi:Oddly enough, I raised that very thing in a design review yesterday. The pilot is intended to prove a process technology, not to prove the durability of its equipment. The various maintenance and design life issues can be addressed with larger equipment in a commercial scale development once the processing technology is proven. Meanwhile, I don't mind beating up this equipment for a few months - but it does have to work for those few months.
Regards,
SNORGY.
(Mechanical)
30 Apr 10 11:07You can get a nice PC Pump for this service, running about 160 rpm, with probably a 3 hp or so gearmotor. That's what I'd look at.
(Mechanical)
1 May 10 08:04A properly selected progressive cavity will do that duty just fine. Properly selected means <200 rpm and two stage. You can pump far worse than that with a PC pump and still get decent life. I'd choose the second company you list but I am biased!
Regards
Nick
(Mechanical)
3 May 10 18:00An AODD or AO Pistin Pump can handle this. You can get an AODD Pump with an Output pressure of more then the air inlet pressure. So lets say it is water and 150 ft of head is approx 65 psi. An AODD pump can have a max air inlet pressure of 120 psi with a 1:1 ratio and pump your fluid at a maxiumum of 120 psi. Their are piston pumps with a 26:1 ratio but this is often used when pumping extremely viscous fluids, ink, resins, etc. If you look at say ARO pumps they will show the fluid output and how many CFM's are required and all the other gory details.
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