This Code prescribes requirements for the design materials construction assembly inspection testing operation and maintenance of piping transporting aqueous slurries of nonhazardous materials such as coal mineral ores concentrates and other solid materials. I am making up to a 40 wt lime solution in water by auger feeding 5 tph hydrated lime into a simple mixing tank.
Slurry Transfer Hayward Gordon
Diy fair over slaker has automatic level proDes.
. Every change of direction adds friction losses to the flow. Piping systems can take many forms from overland pipelines to mineral processing plants coal washeries and the like. To provide a deeper understanding of the calculations a manual calculation example is given in the appen-dix of the book.
Lime slurry can be an unforgiving material to pump because it is inherently abrasive corrosive has high particulate and high viscosity. ----- Type of Wdter Used iri Slurry Makeup. - with water is often called a slurry.
Special considerations relevant to this systems are introduced by the fact that slurry in not homogeneous phase unlike gas or liquid. Pipeline Design Problem Design a pipeline for transporting crushed limestone from a quarry to a terminal located some distance away using water as a transporting medium. The mass flow rates of the various slurry streams are fixed by the sulfur content of the coal being fired and water discharge limitations.
A suspension of solid particles in a liquid as in a mixture of cement clay coal dust manure meat etc. Size slurry piping with a min velocity of. Lime slurry is a stable suspension and is not corrosive once the slurry has been stabilized by allowing all of the water to fully react with the calcium hydroxide usually about 15 minutes minimumThe dissolved solids from the dilution water will precipitate if injected before stabilization on piping and injectors and form scale.
Flow velocities in slurry transport systems to avoid settling of solids. Lime slurrying and pumping. 22001 Piping systems are not subject to the approval of TSSA Boilers and Pressure Vessels Safety Division.
Pigging of Slurry Pipeline. If you are not sure about the type of slurry the choice of pump the design of the pipe system. There is a newer edition of this standard available.
Lime slurry 1s transferred from the slakers to a storagidaj tank by gravity. The limestone is crushed at the quarry mixed with water to form a slurry and pumped through the pipe. Their unique design makes them almost perfect for this duty but care must be taken in the inlet design to ensure proper operation.
One advantage of the process is the lack of serious material corrosion problems. Lime Slurry Transfer Type of Piping. The EDDY Slurry Pump was designed to excel in the harshest applications and makes it a superior.
Learn how the EDDY Pump is a top choice for lime slurry pumping. Tanks made of corrosion resistant metal should be used to avoid abrasion problems. Inlet Design for Lime Slurry Applications.
Material buildup on valve seats and other surfaces can cause the valves to freeze in position. Transportation of bulk materials in the form of a slurry through piping systems is a most efficient and effective mechanism. Slurry can be described as liquid with solids suspended therein.
Lime slurrying and pumping. Browse Our Slurry Pumps Contact Us For a Quick Quote. We would like to minimize the operating cost which is primarily.
A rotating atomiser is used situated in the top of the spray-dry chamber. Often times the viscosity increases at slaking temperatures of 80C 176 F and above. The transfer lines are clear elastic hose 3-inch diameter.
The tank is located belowoeside the slakers. PeterAB Chemical OP 1 Apr 04 1054. A straight line from tank to.
Below ground refill being substantially less. Probes used for level control in the slurry tank are often coated with lime solids and rendered ineffective. The lime changes its state to a solid mass of material commonly referred to as scaling.
Tomato juice is 180 cps Size metering pumps with a 301 turn-down. Describe slurry pumps slurry pumping and the various parameters required when selecting submersible slurry pumps using FLYPS. Any design should assume that and provide for back-flushing of the nozzle or dilution of the slurry by having a side port where liquid from the top of the tank can be injected into the nozzle.
If this wears or suffers blockage the spray pattern is affected which reduces further the desulphurisation efficiency. Mechanically the design of the lime-slurry spraying equipment is important. Lime Slurry - Up to 150 PSIG.
Maintain the inlet line in as straight a run of piping as possible. Wilfley Kpro K and HD slurry pumps are very commonly used in lime slurry applications. Scaling causes a pipelines inner diameter to become smaller and smaller.
Kpro K and HD are all designed with their suction on the side of the pump and with the. Specifics - High density lime 35 35 slurry acts as a pseudo plastic and will not settle or scale pipelines 35 slurry has a viscosity of 200 cps. Reduces cost of lime supply.
Certain changes in the hydration conditions or impurities in the lime will increase the viscosity of the slurry thus affecting settling time. Design the inlet piping to be as short as possible between the sump and pump. Specification of FGD slurry piping is actually simplified by the constraints imposed by the process design.
Plant water Special Equiprrent. INPIPE PRODUCTS was approached to look at progressive cleaning of an 8 mine slurry pipeline used for transporting rock waste with water and cement to refill areas of the mine following ore extraction. Some of these constraints are generic to all lime or limestone FGD systems.
Design Conditions 150 PSIG 149oF Operating Conditions Atmospheric - 125 PSIG 110oF Design Fabrication Installation Approval Requirements ASME B311 Power Piping OReg. Posted by vickyadmin September 19 2018 September 30 2021. Specialized valves can minimize the buildup in the nozzle but aren t foolproof.
The financial ramifications of improper valve instrumentation and piping selection for processes such as lime slurry can have a long-term negative impact on most operations. Slurry piping system like any other system consists of slurry pumps pipelines and valves. In transport systems for slurries its important to avoid settling of solids by keeping the fluid velocities in the pipe lines.
On-site preparation of high-density slurry concentrations ranging from 32-38 eliminates the need for costly delivery of lime in slurry form HDL Slurry remains in suspension drastically reducing scaling build-up in pipe and equipment HDL reduces operator maintenance and equipment downtime. Inlet Design Hints 1. Lime Slurrying A severe problem of abrasion occurs if fiber rein- forced plastic FRP tanks are used for slurry pre- paration.
This Manual sets out the basic principles and gives a good appreciation of the technology. The pumps that move the slurry are dont reach their design capacity because of lumps and air entrained in the solution. The viscosity of hydroxide slurry can vary greatly from lime to lime as well as process conditions.
