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Download Lesson D D D D N N N N A A EngineeringEngineering and and the the Environment Environment SCIENCESCIENCE A TECHNO A TECHNOLOLGOYG Y N N I I I ACTION I ACTION FOURTHSECOND FOURTHSECOND EDITIONEDITION EDITIONEDITION D D N N A Engineering and the Environment SCIENCE A TECHNOLOGY N I I ACTION FOURTHSECOND EDITIONEDITION OurOur environments environments In fact,In fact,a facility a facility such such as Kiln as 3Kiln is a3 triumphis a triumph of engineering of engineering and andtechnology technology. To . To EnergyEnergy recovery recovery plan,plan, design design and andinstall install such such a plant a plant requires requires the inputthe input of many of many engineering engineering In recentIn recent times, times, we wehave have all becomeall become aware aware of theof theneed need to to The Thecost cost of the of thefuel, fuel, which which is currently is currently petroleum petroleum coke, coke, to heat to heat the the disciplines,disciplines, including including mechanical, mechanical, electrical, electrical, civil, civil, structural, structural, electronic, electronic, and and materialsmaterials and andthe theelectricity electricity to driveto drive motors motors and andconveyors conveyors etc. etc.is is protectprotect the theenvironment environment. When. When we werefer refer to the to theenvironment environment in in environmental.environmental. The Thecompany’s company’s project project team team of engineers of engineers is working is working in co- in co- significantsignificant in cement in cement manufacturing. manufacturing. Considerable Considerable savings savings are aremade made thisthis sense sense we weusually usually mean mean the thenatural natural environment environment, the, theearth earth operationoperation with withexternal external contractors contractors to complete to complete this thisinstallation. installation. Kiln Kiln3 will 3 will whenwhen heat heat energy energy recovered recovered from from the clinkerthe clinker leaving leaving the kilnthe iskiln used is used for for cost costsome some €200 €200 million. million. In effect, In effect, the plantthe plant is a iscombination a combination of machinery of machinery, , itself,itself, trees, trees, rivers rivers and and the thesurrounding surrounding atmosphere. atmosphere. This This pre-heatingpre-heating the rawthe rawmaterials. materials. processesprocesses and andcontrol control systemsIn systems fact, and a and tofacility operate to operate such it, the it,as engineersthe Kiln engineers 3 is requirea triumph require a a of engineering and technology. To Energy recovery naturalnaturalOur environment environmentsenvironment is isdistinguished distinguished from from the thebuilt built deepdeep knowledge knowledge and andunderstanding understanding of these of these elements. elements. plan, design and install such a plant requires theThe Theinput Cement Cement of many Mill Mill engineering environmentenvironmentIn recent. times, we have all become aware of the need to The cost of the fuel, which is currently petroleum coke, to heat the disciplines, including mechanical, electrical, civil,The The machinerystructural, machinery that electronic, thatgrinds grinds the and clinkerthe clinker and andgypsummaterials gypsum together togetherand to thefinally to finallyelectricity to drive motors and conveyors etc. is OverOver many many years, years, scientists scientists have have developed developed theories theories to explain to explain various various ProtectingProtecting the the environment environment protect the environment. When we refer to the environment in environmental. The company’s project team ofproduce engineersproduce the cementthe is cement working is called is called in a co-cement a cement mill. millThesignificant. TheKiln Kiln3 Project 3 Project in includes cement includes manufacturing.CRHCRH is an is international anConsiderable international leader leader savingsin the in manufacture the manufactureare made and anddistribution distribution featuresfeatures of the of thenatural natural environment environment such such as theas thesun’s sun’s light, light, rainbows, rainbows, The TheKiln Kiln3 operation3 operation isoperation designedis designed withfor forworld-class external world-class contractors energy energy efficient efficientto complete a Vertical athis Vertical installation. Roller Roller Mill. Mill.The Kiln Thematerials 3 materialswill are arecrushed crushed on aon steel a steel table table by by of buildingof building materials. materials. lightning,lightning,this the sense airthe weair breathe,wewe breathe, usually and andthe meanwaythe waythe wholethethe whole naturalecosystem ecosystem environment is inter- is inter- , the earth when heat energy recovered from the clinker leaving the kiln is used for productionproduction and andenvironmental environmentalcost protection. some protection. €200 The Theengineersmillion. engineers In will effect, accomplishwill accomplish the plant isvertical a combinationvertical steel steel wheels. wheels. of The machinery Thetable table is driven, is driven by motors by motors of typically of typically 2000 2000 kW kW related.related.itself, At the At samethetrees, same time, time,rivers as we as constructwe and construct the builtthe surrounding built environment, environment, we useatmosphere.we use thesethese objectives Thisobjectives by usingby using the theBest Best Available Available Technology Technology (BAT) (BAT) at all at all – 4000– 4000 kW (MotorskW (Motors are oftenare often specified specified in terms inpre-heating terms of horsepower of horsepower the rawwhere1 where1 materials. The Thecompany company employs employs over over 92,000 92,000 employees employees in 34 in countries. 34 countries. manymany of theof theearth’s earth’s natural natural resources. resources. Our Ourroads, roads, bridges, bridges, railways, railways, stagesstages in the in manufacturingthe manufacturingprocesses process. process. Clearlyand Clearly control the company’sthe systemscompany’s engineers and engineers to operate horsepower it,horsepower the engineers = 746 = 746W or W 0.746require or 0.746 kW) akW) The Theproduct product range range is vast is vastand andincludes includes cement, cement, lime, lime, aggregates, aggregates, houseshousesnatural and andoffice office environmentblocks blocks all useall usesteel steel andis andconcrete. distinguishedconcrete. These These widely widely usedfrom used mustthemust be thoroughlybebuilt thoroughly familiar familiardeep with knowledge withthese these technologies. technologies. and understanding In particular, In particular, the of thesethe elements. asphalt,asphalt, ready-mixed ready-mixed concrete, concrete, pre-cast pre-cast concrete concrete products, products, materialsmaterials are producedare produced by extracting by extracting and andprocessing processing natural natural resources. resources. environmentalenvironmental engineers engineers will willbe closelybe closely monitoring monitoring performance performance to to The Cement Mill environment. ControlControl Systems Systems glassglass and andmany many other other building building materials, materials, The TheCompany’s Company’s annual annual ensureensure that thatthe theplant plant meets meets the thecompany’s company’s environmental environmental policy policy salessales are areover over €20 €20billion. billion. CRH CRH shares shares are arelisted listed on theon theIrish Irish SophisticatedSophisticated control control systems systems are requiredare required to Theoperate to operate machinery a plant a plant like Kilnlikethat Kiln3. grinds 3. the clinker and gypsum together to finally Over many years, scientists have developed theories to explainobjectivesobjectives various of: of: Protecting the environment (ISE)(ISE) and andLondon London (LSE) (LSE) Stock Stock Exchanges Exchanges and andon the on Newthe New York York UsingUsing natural natural resources resources ThereThere are thousandsare thousands of sensors of sensors and andseveral several computerproduce computer systems the systems cement involved involved is called a cement mill. The Kiln 3 Project includes CRH is an international leader in the manufacture and distribution StockStock Exchange Exchange (NYSE). (NYSE). CRHCRH isfeatures a ismajor a major companyof companythe naturalin the in extractivethe environment extractive industry industry andsuch anda world asa world leaderthe leadersun’s in in light,• minimisingrainbows,• minimising emissions emissions Theto air to and Kilnair andto water3 to operationwater is designed for world-classin thisin thisprocess. process. energyData Data are continuallyareefficient continually fed backfed backa to Verticala tocentral a central controlRoller control room Mill. room The materials are crushed on a steel table by of building materials. the theproductionlightning, production of the buildingof airbuilding we materials. breathe, materials. CRH and CRH produces the produces way boththe both wholeprimary primary ecosystem • conserving• isconserving inter- mineral mineral andproduction andenergy energy resources resourcesand environmental protection. Thewhere engineerswhere process process engineers will engineers accomplish monitor monitor temperatures, temperatures, flow flow rates, rates, valves valves etc. etc. IrishIrish Cement Cement Ltd Ltdis a issubsidiary a subsidiary of CRHof CRH and andoperates operates two two materialsmaterials and andvalue-added value-added products products for use for useby the by constructionthe construction industry industry vertical steel
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