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Coal Slurry Pipeline
Coal pipelines are pipelines used to transport coal from where it is mined to where it is consumed. For very short distances, large trucks are used to transport coal, but trains and barges are preferred for long distances. In some cases it is more economical to move the coal by pipeline than by train or barge. This can happen when there is no suitable railway or waterway to transport the coal, or when it must be moved very long distances. There are two types of coal pipelines, slurry and log. Slurry pipelines use a slurry of water and pulverized coal. The ratio of coal to water is about 1 to 1 by weight. Coal log pipelines use coal that has been compressed into logs with a diameter 5 to 10% less than the diameter of the pipeline and a length about twice the diameter of the pipeline.Hydraulic Transport of Coal in Combination With Oil Granulation / V.Biletsky // 8th International Conference on “Transport and Sedimentation of Solid Particles” 24–26 January 1995, Pragye, Czech R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pipeline Transport
A pipeline is a system of Pipe (fluid conveyance), pipes for long-distance transportation of a liquid or gas, typically to a market area for consumption. The latest data from 2014 gives a total of slightly less than of pipeline in 120 countries around the world. The United States had 65%, Russia had 8%, and Canada had 3%, thus 76% of all pipeline were in these three countries. The main attribute to pollution from pipelines is caused by corrosion and leakage. ''Pipeline and Gas Journal''s worldwide survey figures indicate that of pipelines are planned and under construction. Of these, represent projects in the planning and design phase; reflect pipelines in various stages of construction. Liquids and gases are transported in pipelines, and any chemically stable substance can be sent through a pipeline. 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 wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrifuge
A centrifuge is a device that uses centrifugal force to subject a specimen to a specified constant force - for example, to separate various components of a fluid. This is achieved by spinning the fluid at high speed within a container, thereby separating fluids of different densities (e.g. cream from milk) or liquids from solids. It works by causing denser substances and particles to move outward in the radial direction. At the same time, objects that are less dense are displaced and moved to the centre. In a laboratory centrifuge that uses sample tubes, the radial acceleration causes denser particles to settle to the bottom of the tube, while low-density substances rise to the top. A centrifuge can be a very effective filter that separates contaminants from the main body of fluid. Industrial scale centrifuges are commonly used in manufacturing and waste processing to sediment suspended solids, or to separate immiscible liquids. An example is the cream separator found in da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Infrastructure
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other Chemical element, elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is a type of fossil fuel, formed when dead plant matter decays into peat which is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous (Pennsylvanian (geology), Pennsylvanian) and Permian times. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until the Industrial Revolution. With the invention of the steam engine, coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its Electricity generation, electricity. Some iron and steel-maki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal-water Slurry Fuel
Coal-water slurry fuel is a mixture of fine coal particles suspension (chemistry), suspended in water. Such slurries are used to transport coal. Typically, the slurry is dried prior to combustion. In principle but not in practice, coal slurries can be used to power boilers, gas turbines, diesel engines, and heating and power stations. Characteristics A coal-water slurry fuel is defined by a number of factors including its viscosity, particle size, rate of sedimentation, ignition temperature (), combustion temperature (), ash content and calorific value (). When coal-water slurry fuel combusts, over ninety-nine percent of its carbon content is consumed. Coal-water slurry fuel is fire-proof and explosion-proof. Ash content of less than ten percent is desirable for boilers. For diesel engines, there is no limit. Production The production of coal-water slurry fuel involves the crushing of coal or coal sludge to particles between 10 and 65 micrometers diameter (standard crush ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Mesa Peabody Coal Controversy
Peabody Energy mined coal at the Black Mesa plateau in the southwestern United States from the 1960s until 2019. The plateau overlaps the Navajo and Hopi reservations. Controversy arose from an unusually generous mineral lease agreement between the Tribes and Peabody Energy and the company's depletion of the Navajo aquifer, which threatened Navajo water rights. Controversy In 1964, Peabody Energy (then Peabody Western Coal), a publicly traded energy company based in the Midwestern United States, signed a contract with the Navajo Tribe and two years later with the Hopi Tribe, allowing the company mineral rights and use of an aquifer. The contract was negotiated by prominent natural resources attorney John Sterling Boyden, who claimed to be representing the Hopi Tribe while actually on the payroll of Peabody. It offered unusually advantageous terms for Peabody and was approved despite widespread opposition. The contract is also controversial because of misrepresentations made to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona
Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the northwest and California to the west, and shares Mexico-United States border, an international border with the Mexican states of Sonora and Baja California to the south and southwest. Its Capital city, capital and List of largest cities, largest city is Phoenix, Arizona, Phoenix, which is the most populous state capital and list of United States cities by population, fifth most populous city in the United States. Arizona is divided into 15 List of counties in Arizona, counties. Arizona is the list of U.S. states and territories by area, 6th-largest state by area and the list of U.S. states and territories by population, 14th-most-populous of the 50 states. It is the 48th state and last of the contiguous United States, contiguous states to be a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Mesa Mine
The Kayenta mine was a surface coal mine operated by Peabody Western Coal Company, a subsidiary of Peabody Energy) on the Navajo Nation in northern Arizona from 1973 to 2019. About 400 acres were mined and reclaimed each year, providing about 8 million tons of coal annually to the Navajo Generating Station. History The Kayenta mine was located near the northern edge of Black Mesa, a 5,400 square mile highland plateau in northeast Arizona that contains extensive coal deposits in several geologic formations. Since about 1300 AD, the Hopi had extracted coal from the area for pottery firing and domestic heating. In the early 1900s, limited surveying of the coal field was made and a number of small underground mines were put into production, supplying local reservation schools and communities in the region. The coal field received increased attention beginning in 1950 when the Navajo-Hopi Long Range Rehabilitation Act was enacted in response to dire economic conditions on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laughlin, Nevada
Laughlin () is an unincorporated community in Clark County, Nevada, United States. Laughlin lies south of Las Vegas, in the far southern tip of Nevada. As a resort town, it is known for its gaming and water recreation. As of the 2020 census, the population was 8,658. For statistical purposes, the United States Census Bureau has defined Laughlin as a census-designated place (CDP). It is located on the Colorado River, downstream from the Davis Dam and Lake Mohave, and directly across from the much larger Bullhead City, Arizona. The nearby communities of Bullhead City, Arizona; Needles, California; Fort Mohave, Arizona; and Mohave Valley, Arizona, bring the area's total population to about 100,000. Laughlin is also northeast of Los Angeles. Laughlin was named for Don Laughlin, an Owatonna, Minnesota native, who purchased the southern tip of Nevada in 1964 (informally called South Pointe). At the time, Don Laughlin operated the 101 Club in Las Vegas. He opened what would be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mohave Generating Station
Mohave Power Station (known also as Mohave Generating Station, or MOGS) was a 1580 megawatt electric (MWe) coal-fired power plant that was located in Laughlin, Nevada. Southern California Edison is the majority owner of the plant and was its operator. The plant entered commercial operation in 1971. A steam line that ran near the plant's control room and cafeteria ruptured on June 9, 1985, fatally scalding six and injuring ten more. In 2005, the plant was shut down and was later dismantled. Design The plant was composed of two units capable of generating 790 MWe each. During normal operation, output varied between 350 and 750 MWe; the baseload plant operated with a capacity factor of 71.5% between 1990 and 1998. Combustion Engineering supplied the boilers and GE supplied the turbine-generators. Bechtel was the architect-engineer, responsible for engineering, procurement and construction. The Mohave Generating Station was built on a site in the Mojave Desert adjac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southwestern United States
The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural list of regions of the United States, region of the United States that includes Arizona and New Mexico, along with adjacent portions of California, Colorado, Nevada, Oklahoma, Texas, and Utah. The largest cities by List of metropolitan statistical areas, metropolitan area are Phoenix, Arizona, Phoenix, Las Vegas, El Paso, Texas, El Paso, Albuquerque, and Tucson, Arizona, Tucson. Before 1848, in the historical region of Santa Fe de Nuevo México as well as parts of Alta California and Coahuila y Tejas, settlement was almost non-existent outside of New Mexico's pueblos and Santa Fe de Nuevo México#Regions and municipalities, Spanish or Mexican municipalities. Much of the area had been a part of New Spain and Mexico until the United States acquired the area through the Treaty of Guadalupe Hidalgo in 1848 and the smaller Gadsden Purchase in 1854. While the regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desert
A desert is a landscape where little precipitation occurs and, consequently, living conditions create unique biomes and ecosystems. The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or Semi-arid climate, semi-arid. This includes much of the Polar regions of Earth, polar regions, where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location. Deserts are formed by weathering processes as large variations in temperature between day and night strain the Rock (geology), rocks, which consequently break in pieces. Although rain seldom occurs in deserts, there are occasional downpours that can result in flash floods. Rain falling on hot rocks can cause them to shatter, and the resulting frag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Fuel Power Station
A fossil fuel power station is a thermal power station that burns fossil fuel, such as coal, oil, or natural gas, to produce electricity. Fossil fuel power stations have machines that convert the heat energy of combustion into mechanical energy, which then powers an electrical generator. The prime mover may be a steam turbine, a gas turbine or, in small plants, a reciprocating gas engine. All plants use the energy extracted from the expansion of a hot gas, either steam or combustion gases. Although different energy conversion methods exist, all thermal power station conversion methods have their efficiency limited by the Carnot efficiency and therefore produce waste heat. Fossil fuel power stations provide most of the electrical energy used in the world. Some fossil-fired power stations are designed for continuous operation as baseload power plants, while others are used as peaker plants. However, starting from the 2010s, in many countries plants designed for baseload s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
