The slurry circulating pump is the cornerstone of the desulfurization equipment. It is located next to the absorption tower. Its main f unction is to constantly circulate the sludge in the absorption tower and completely absorb the sulfur dioxide in the flue gas with a single-suction, single-stage horizontal centrifugal pump.
How Does It Work?
The slurry circulating pump standard in houses, buildings, etc., are centrifugal pumps entirely powered by electricity. A conventional pump has three key components: the pump impeller, the support bearings, and the motor rotor.
The motor spins the impeller, which draws water and sends it to the pipes. An impeller is a wheel with bent blades that acts like a turbine. When the motor is turned on, the impeller spins rapidly, sending cold water to the boiler for heating. At the same time, it draws hot water to the fixtures. Water-repellent material is used to protect the motor’s components and parts.
The circulating pumps for the home are small enough to be installed alongside your plumbing system. The industrial-type pumps, however, are enormous and have their motors located separately from the pipe system.
The hot water system pumps are both energy and cost-efficient. They are powered by a motion sensor or a remote button that activates when you need hot water.
The mechanism for Slurry Circulating Pump Operation
The centrifugal created when the impeller rotates at high speed while being powered by the motor allows the fluid to gain energy; that is, once the fluid passes through the impeller, the pressure energy, and kinetic energy may be enhanced, allowing it to be carried to a high or distant location. At the same time, negative pressure is generated at the pump’s input, and the medium is automatically drawn into the impeller for supplementing under the influence of air pressure. The medium is drawn in and out by the centrifugal pump’s continuous action, which generates a constant flow and constantly moves the medium out.
Applications for Slurry Circulating Pump
All industrial pumps must withstand harsh conditions, but few machines are exposed to harsher environments and vibrations than slurry pumps. Slurries are designed to handle the heaviest mixtures and large particles without damaging or wearing out the pump. This is why Kingda pumps are so effective as circulators. Whatever your mud circulation goals, there is almost certainly a good technique for using a mud pump to get the job done. These are some of the most typical sludge and recycle sludge applications in manufacturing, processing, industrial, and other high-solids pumping applications.
Here are a few examples of Slurry Recirculation Pump applications:
- Sludge Storage Mixing
- Keep Grit in Suspension
- Sump, Railcar, and Settling Tank Mixing
- Backflow Prevention
- Mining Froth Flotation
Characteristics of Circulating Pump
The slurry circulating pump is an important component of the power plant’s hydrogen storage system. Its primary duty is to continually spread the slurry in the absorption tower to absorb the sulfur dioxide in the flue gas thoroughly.
The slurry circulation pump is one of the most vulnerable components, as it is largely affected by acid corrosion, wear, and slurry cavitation. The maintenance of a slurry circulation pump is typically three years, and the impeller must be replaced yearly.
Highly abrasive
An abrasive liquid is one that contains particles. Some have very thin particles, such as inks, while others, such as some paints, contain much larger particles. Because abrasive particles accelerate pump wear, handling abrasive liquids is a difficult application for any pump.
Strongly corrosive
Corrosive liquids, by definition, assault the pump materials. A corrosive liquid’s strength is determined by its concentration and temperature. Moving corrosives and abrasives has the same effect: pumps wear out faster. Corrosion and abrasion both remove material from pump parts; however, corrosion evidence differs from abrasion signs.
Cavitation
The slurry carried by the desulfurization slurry circulation pump in the desulfurization system frequently contains a certain quantity of gas. Cavitation is a problem that can occur in any fluid flow system. Despite being a constant threat, it is little understood.
The accumulation of gas at the pump suction entrance and the rear of the blades may increase the flow resistance or cut it off, worsening the operating conditions. The quantity of cavitation must be increased, the gas density must be low, the specific volume must be significant, the compressibility must be high, and the rheology must be strong. The primary causes of worsening pump operating conditions are low centrifugal force and poor conversion energy performance. The test results reveal that the pump’s performance drops dramatically when the liquid’s gas volume (volume ratio) reaches roughly 3%. The pump is turned off when the incoming gas hits 20% to 30%. The centrifugal pump allows the air content to be increased (volume ratio).
Precautions for selection of slurry recirculation pump
- Check the alignment of the drive and the slurry pump for clockwise rotation before installing the coupling or belt. The reverse operation is strictly banned! Otherwise, persons and gear will suffer significant damage.
- It may produce pump unit vibration or possibly pump liquid vaporization, which would harm the gear.
- Because the pump is a spinning piece of equipment, it must be turned off before installing and maintaining the pump unit. Otherwise, it may result in personal injury.
- It is forbidden to enter or remove the protective cover while the pump unit is operating; otherwise, the physical injury will result.
- Prepare the bearing’s inner ring during installation; temperatures beyond 1200C are not permitted. The bearing’s internal ring must be connected to the shaft shoulder or butter retaining ring.
- When assembling the bearing, ensure that the proper amount of bearing grease is used. The bearing end cover is sealed with a piston ring and a labyrinth. Keep in mind that the gap is diametrically opposed to the arrangement while inserting the piston ring.
Sludge Storage Mixing and Recirculation Common Issues
Because of its properties, mixing sludge are more difficult than mixing other fluids. With different degrees of success, some firms offer sludge mixing systems for holding tanks and digesters. To correctly design such systems, it is necessary to understand the physical properties of the fluid as well as its response to applied forces. Sludge behaves differently depending on its solids content.
The behavior of the fluid interfaces determines mixing efficiency, therefore understanding the dynamics of the interfaces is critical. Mixing efficiency is determined by the volume encompassed by the outer interfaces between recirculated or influent and ambient sludge, rather than the interfacial surface area between the distinct sludge. The primary contributions to mixing efficiency come from the large-scale dynamics of the outer contact.
Sump, Railcar, and Slurry Tank Mixing Issues: How Slurry Recirculation Resolves
Slurry gas is a gas combination that contains exceedingly toxic hydrogen sulfide. Even tiny concentrations of hydrogen sulfide can impair the sense of smell, so you won’t notice it’s around. At greater doses, it becomes difficult to breathe and you become confused and at certain concentrations, just one breath might kill.
Depending on the type of combination, railcar slurries may necessitate brings additional. There are many ways for this to be done. Still, employing pumps to recirculate slurry assists move items around enough to keep the solids afloat and prevent them from sinking to the tank’s bottom in some situations. The more agitated the material, the easier and faster pumping and conveying to the next place.
Mining Froth Flotation: Circulation Slurry Pump
The specific procedure of flotation is to add various flotation chemicals to a specific concentration of slurry, and a large number of dispersed bubbles are formed in the flotation machine by stirring and aeration. At this point, the suspended ore clashes with the bubbles, and some of the floatable rock particles attach to the bubbles and float up to the ore’s surface to create the concentrate; the non-floating mineral remains in the slurry and becomes the tailings. As a result, the mineral sorting goal is achieved.
The flotation machine is an essential part of the mineral beneficiation process. Flotation is affected by a variety of factors during the process, including grinding fineness, slurry concentration, pulp pH, pharmaceutical system, aeration and agitation, flotation time, water quality, and other process variables.
Because of their heavy weight, flotation coarse particles are difficult to suspend in the flotation machine, and the likelihood of collision with the bubbles is minimized. Furthermore, because of the large dropout force, the coarse particles are easily disengaged from the air bubbles after adhering to them. As a result, under normal process circumstances, the coarse particles have a poor flotation effect.
The small particulates in the flotation solvent extraction are small in volume and have a low chance of colliding with the bubbles. The fine grain quality is low, and when it collides with the bubble, the resistance of the hydration layer between the ore particle and the bubble is difficult to overcome.
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