Slurry transport uses several methods: hydraulic conveying; conventional lean slurry conveying; and high concentration slurry disposal (HCSD).

Which of the following can be transported in the form of slurry?

Typical materials that are transferred using slurry pipelines include coal, copper, iron, and phosphate concentrates, limestone, lead, zinc, nickel, bauxite and oil sands.

How are solids transported through pipelines?

Solids transported in a horizontal pipeline proceed in a suspended condition in the fluid, or may be dragged along the bed of the pipe. ... The head loss also depends on the pipe diameter and the particle specific gravity and size, represented by the drag coefficient of the particles.

What are the design considerations for a piping system to transfer slurries?

The design of the system (including selection of proper materials) is governed by following general considerations: a) No solid deposition in system. b) No change in slurry composition from inlet to outlet of the system. c) Minimum wear and tar or erosion.

What is homogeneous slurry flow?

The homogeneous flow regime is modelled as a Reduced Equivalent Liquid Model (RELM) with mobilization of the reduction based on the ratio between the thicknesses of the viscous sub layer to the particle diameter. For very small particles there is no reduction at low line speeds.

Maintain Successful Slurry Transport in Pipelines

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How do you measure the capacity of a slurry pump?

The slurry pump shaft power calculation formula: P=m*g*h/η, and its derived formula: P=ρ*Q*H/102η (pay attention to the safety factor); Q for capacity, h for head, and η for efficiency.

What can be transported through pipelines?

Pipelines exist for the transport of crude and refined petroleum, fuels – such as oil, natural gas and biofuels – and other fluids including sewage, slurry, water, beer, hot water or steam for shorter distances.

How do multi product pipelines work?

Multiproduct pipelines operate in either segregated or fungible mode. Segregated products are branded or blend-stock materials whose identity is maintained throughout transportation, and the same batch received for shipment is delivered at the destination.

How do water pipelines work?

Before operations begin, the pipeline is tested for leaks through water pressure or x-ray testing. The fluid being transported is pumped into the pipeline with its momentum and pressure being stabilized by pumps placed at numerous pumping stations along the distribution line.

What fluid velocity best carries heavy solids through a pipe?

The velocity required to reach fluid movement was approximately 0.6 to 1.0 m/s (2 to 3 ft/s), which is consistent, but, to some extent, higher than the values generally used in conventional sewer design practice.

What happens at velocities above the transport velocity?

The velocity of the water in the pipe should be optimum. If the velocity is too low, the solids will settle out, resulting in blockage of the pipe and the water flow. If the velocity is too high, friction losses will be high.

What is a slurry mixture?

slurry, watery mixture or suspension of insoluble matter. In the manufacture of portland cement, a mixture of the raw materials with water is called a slurry.

Which of the following is ideal for transportation of slurry?

The answer is pipelines.

What processes may constitute the slurry preparation for transport?

In the slurry preparation process, coal slurry suitable for transportation is produced by performing size reduction (crushing and grinding) and chemically treating (corrosion inhibition and thinning) it, if needed, to improve the final characteristics of the product.

What is a slurry pond?

Any natural or artificial pond or lagoon for settling and draining the solids from washery slurry.

Can pipelines carry more than one product?

Batching involves using the same pipeline to ship different types and/or grades of liquid products, such as light crude, heavy crude, or diluted bitumen. ... Trans Mountain is the only pipeline in North America that batches both refined products and crude oil for shipping.

Why is it called a pipeline pig?

What are pipeline pigs? ... Early pigs were made from materials such as straw, barbed wire and leather and made a squealing sound while traveling through the pipes – for this reason, they were eventually called “pigs”. The name eventually became an acronym for “Pipeline Inspection Gauge” or “Pipeline Intervention Gauge”.

Which commodity is not transported through the multi product pipeline?

Often, crude oil and refined petroleum products are not to be transported in the same pipeline.

Are pipelines the safest way to transport oil?

US Department of Transportation data shows pipelines are the safest mode of energy transportation. Accidents are rare. According to the most recent numbers available, 99.999997% of gas and crude oil is moved safely through interstate transmission pipelines.

What are the 3 types of pipelines that carry oil?

Petroleum pipelines transport crude oil or natural gas liquids, and there are three main types of petroleum pipelines involved in this process: gathering systems, crude oil pipeline systems, and refined products pipelines systems.

Are pipelines bad for the environment?

Releases of products carried through pipelines can impact the environment and may result in injuries or fatalities as well as property damage. ... Oil can linger in the environment for many years, even after a cleanup, continuing to affect fish, wildlife, and humans.

How do you measure the flow rate of a slurry?

One method of measuring slurry flow is differential pressure across a primary flow element. The choice of primary flow elements is limited. Pitot tubes are unsuitable due to clogging. Orifice plates face this problem with the additional complication of erosion of the critical orifice bore.

What is a centrifugal slurry pump?

The centrifugal slurry pump uses the centrifugal force generated by a rotating impeller to impact kinetic energy to the slurry, similar to how a water-like liquid would move through a standard centrifugal pump.

What is pump head ratio?

H_R The pump head ratio (H_R) is the ratio of slurry head produced to the head produced for water at the pump best-efficiency point (BEP) measured for water. E_R The pump efficiency ratio (E_R) is the ratio of slurry efficiency to the efficiency for water at the pump BEP measured for water.