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Best Buying Guide to Choose the Right Pump for your Pulp and Paper Application
In the pulp and paper industry usage of a right pump at right place makes a vast difference in the production and quality. There are lots of pumps available, but which one is right for you? Understanding which pump is right for your application helps to enhance the production and life of your pump and system. Here is the best buying guide to choose your right pump.
Centrifugal pumps are most commonly used pumps for pumping solvents, chemicals, oils, acids, and bases. Design of a centrifugal pump is suitable virtually in any application involving in low viscosity fluids. It moves the fluid by means of rotational energy from one or more driven rotors, called impellers. Fluid enters rapidly onto a rotating impeller along its axis and is cast out by centrifugal force along its edge through the impeller’s edge tips. The speed of the impeller raises the fluid’s velocity and pressure and directs it towards the pump outlet.
There are two designs of pump casing: volute and diffuser. The purpose of both designs is to transfer the fluid flow into a controlled outflow at pressure.
Features:
• It is very easy to modify to exact requirements due to its modular design.
• Centrifugal Pumps have a higher efficiency point compared to pneumatically driven pumps.
• Centrifugal Pumps are versatile in many different shapes and sizes.
Rotatory lobe pumps are also known as positive displacement pumps they are versatile stand-alone equipment. Primarily used in the chemical industry and environmental technology these pumps handle almost any substance continuously and gently while metering in proportion to rotation speed. Their small space requirement and high power density are some of their most important advantages. Lobe pumps operate the fluid flows around the interior of the casing. The lobes do not make contact with the fluid in the casing. Pump shaft support bearings are located in the gearbox since the bearings are out of the pumped liquid, pressure is limited. Shaft deflection reduces the noise levels of the pump.
Features:
• tolerance of dry running
• self-priming
• conveyance of media with low or high viscosity
• large ball passage
• space-saving, compact but highly efficient construction
Chemical process pumps are used in a variety of process applications due to their reliability and reduced operating costs. It is mainly used in the chemical, petrochemical, acids, aggressive products and inorganic and organic products industry. The speed of the standard chemical process pumps is a maximum of 360 rpm and the temperature can go up to a maximum of 350 °C. Its modular design features a back pull-out construction for easy maintenance and a fully open impeller that provides hydraulic balance and reduces the axial thrust.
Features:
• Back Pull out Design
• Steady Flow
• High Efficiency
• Sturdy Construction
• Low NPSH
• Noise & Maintenance Free
• Environmental friendly
• Shaft Deflection below 0.05mm
• Casing cover cooling or heating is possible
The fan pump impels the dilute slurry of papermaking furnishes towards the headbox of a paper machine. The pumps are designed in such a way as to reduce pulsation since the purpose is to keep the base weight constant over time and dodge "barring". Thick stock, usually having a consistency of about 3 to 5% is thinned with white water at the inlet of the fan pump. The proportion of thin-stock furnish coming out of the fan pump is typically between 0.3%-1%. Papermakers often add chemicals such as fillers, acid, or base before the fan pump so that they can take advantage of the mixing action. Fan pumps are generally placed beneath the forming section of the paper machine.
Features:
• Axial split, single/ two stages.
• Double suction, radial staggered vane impeller.
• High reliability & vibration free performances.
• Gland Packed & Mechanical seal.
• Reverse rotation.
In the process of pulp and paper making, there are many technical areas that need vacuum dehydration. For example, the vacuum suction tank of the mesh part, the vacuum suction roll, the vacuum holding part at the vacuum suction tank for the upper and lower wet pulp, etc. The range of Liquid ring vacuum pump is a generally used method for vacuum dewatering of papermaking pulp. When selecting the pumping, ensure it meets the capacity of technical requirements of the production line.
Slurry Pump:
A slurry pump is a sort of pump designed for pumping liquid including solid particles. Slurry pumps vary in design and construction to adjust to the different concentration of solids, size of solids, the weight of solids, the shape of solids and chemicals. A slurry pump is most muscular than liquid pumps due to added atoning material and replaceable parts to withstand wear due to abrasion.
Centrifugal slurry pumps have bearings supported shaft with split casing and rubber or metal lined casing or most common overhung impeller in horizontal, vertical suspended and submersible pump.
Process pumps are used to transfer fluid in a specific way, in a particular industrial process. These types of pumps are found in two common types; API (American Petroleum Institute) Process Pumps and ANSI (American National Standards Institute) Process Pumps.
API Process pumps are centrifugal pumps that are often used in refineries. ANSI Process Pumps, end suction centrifugal pumps that are often used in the chemical industry and other industrial plants.
Features:
• Open impeller, construction.
• End suction, top centre line discharge.
• Gland Packed & Mechanical seal.
• Simple external axial adjustment for impeller wear.
