Due to an oscillatory movement, the grates cause the flow and the spreading of the solid material. Clinker coolers content tasks of clinker cooler theory and definitions grate coolers cooler upgrade clinker crusher rotary coolers 4. The energy analysis for the base case grate clinker cooler is performed by using the. Upon exiting the kiln, the cement clinker is cooled to approximately 80. Dec 10, 2018 phase, as the clinker passes through the frst cooling zone in the rotary kiln or on folling down the chute into the grate cooler. Assessment of energy and exergy efficiencies of a grate clinker cooling system through the optimization of its operational parameters.
The cooling was mad suddenly for clinker by three water types at the same time. Jun 14, 2019 substantial improvements in clinker cooling were achieved right after startup. White cement clinker can be efficiently produced using a kiln 10 for sintering cement clinker and unloading the cement clinker from the kiln 10 to a clinker cooler 30 for exchanging thermal energy between the hot clinker 33 and a gaseous coolant by subjecting the clinker 33 to a flow of said gaseous coolant to thereby cool the clinker 33 and in return heat the gaseous coolant, if the gaseous. This study focuses on improving the energy, exergy and recovery efficiencies of a grate cooling system through the optimization of its operational parameters such as masses of cooling air and clinker, cooling air temperature, and grate speed. The grate is made of steel, and the cold air keeps it sufficiently cool to avoid melting or burning.
The cooling of cement is an important step prior to storage in mitigating gypsum dehydration and subsequent moisture liberation which can lead to lump formation. The essential characteristic of a grate cooler is a layer of clinker spread on a moreorless horizontal perforated grate, through which cold air is blown. The clinker dust particules carried back by the secondary air stream from the clinker bed grate into the interior of the rotary kiln also play an important role on formation of these deposits. The airquenching shaking grate clinker cooler was developed more than 20 years ago as an improved heat recuperating cooler for use with rotary kilns.
Following the stationary inlet kids, the cooler is divided into separately aerated compartments. The system of clinker burning is composed of three parts. The cooling of the gas also causes the gas volume to reduce and protects downstream plant components from excessive gas temperatures. Injecting water into the clinker cooler provides a remedy here. In the case of a planetary cooler the kiln burner pipe is always inserted into the rotary kiln so that a cooling zone behind the flame of 1. The kids is a revolutionary technology in clinker cooling both mechanically and process wise. Es2272122b1 clinker cooling system for cement manufacturing. In this project, automation of clinker cooling system we are cooling the hot clinker product obtained from rotary kiln for further handling and for avoiding unwanted chemical reactions that affect the quality of cement. Plc based automated clinker cooling system for cement. The cooling of the clinker is modelled by a gassolid series of. This work relates to the exergy analysis and the study of the reduction of entropy production generated during the cooling of the clinker. Hot clinker supplied by the the kiln enters the clinker cooler. Cement cooling is an important step in the cement production. September 2009 and comprises the key parts and detailed engineering of the cooler.
It generates a uniformly distributed clinker bed just before the clinker reaches the mobile grate by evenly spreading the clinker and transporting the. The desired maximum recuperation of the heat from the clinker cooler for use in the kiln system for specific quantities of secondary and tertiary air. Ep2868635a1 cement clinker cooler and method for cooling. Pdf simplified modeling of clinker cooling based on long term. Holcim group support tasks of the clinker cooler 1 recuperation of heat from hot clinker 2 cooling of clinker approach to achieve this. Analysis of heat recovery systems the schematic technological process of cooling. Clinker in transit to the finish mills should be cooler than 100. The company was incorporated in 1972 and is registered with indiamart. Grate coolers are widely used in cement industries to recover heat from hot clinker, coming out from the rotary kiln. The projectscope of work process and design features. It concern with cement plants which are using the water for cooling the clinker elminia white cement plant. It is, however, liable to be at a considerably higher temperature, at least intermittently, at the cooler discharge. Ac drives ensure efficient and precise cooling of clinker and reduce energy consumption application description for clinker quality, cooling plays a very important role. Based on proven flsmidth systems, it incorporates advanced clinker cooling innovations to give you low installation, maintenance and operating costs and a very attractive total cost of ownership.
Level and pressure instrumentation for the cement industry. Rings, buildups, formation in cement kiln clinker and. Simplified modeling of clinker cooling based on long. This study analyzed five cooling rates of portland cement clinker produced in a laboratory. Following capacity increases, cooling with air alone is often no longer sufficient to achieve the proper operating conditions of the downstream filter. In cement plants clinker outlet temperature is directly evaluated by clinker cooler process efficiency. Assessment of energy and exergy efficiencies of a grate. The cement kiln system is designed to accomplish these processes. The concept of the exergy analysis is applied to a grate cooler of a cement production facility. To achieve this, the clinker bed is cooled with a continuous stream of air. Pdf the purpose of the present study is to develop a simplified dynamical model of clinker cooling process performed in grate coolers. Independent of the raw meal used, the different clinker phases were formed in three stages. This study focuses on improving the energy, exergy and recovery efficiencies of a grate cooling system through the optimization of. Mass and energy balance in grate cooler of cement plant.
Pdf assessment of energy and exergy efficiencies of a grate. In a precalciner kiln, cement kiln feed passes through a temperature range from about c at the kiln inlet to about 1450c in the burning zone then exits the kiln at around 0c depending on a number of factors, including the secondary air temperature and the closeness of the burning zone to the outlet. The initial development of the ikn pendulum cooler started more than 30 years ago. This study revealed that the grate cooler efficiency estimated through heat consumption. The started successfully in march with this unique features at ikn pendulum cooler, finally, a system with partial recirculation was successfully installed at line 1. Characteristics of clinker minerals were then analyzed with an emphasis on silicate minerals, alite and belite. Integrating the wellproven claudius peters hemodule and hydraulic drive into its moving floor technology, the eta cooler represents the next evolution in clinker cooling. Strictly speaking the cooling of clinker does not only start in the cooling tubes but already in the kiln.
Cooling processes may be evaluated as one of the energy input considering demand of. I do not want to stop one or two times a year, because my cooler fails i need cold clinker to protect my transports, silo, improve grinding and cement storage. The standard transport system is a steel deeppan conveyor which can handle hightemperature clinker and elevate. The flsmidth crossbar cooler is the latest evolution in clinker cooling technology. Types of cooling system there are two types of system in general zliquid or indirect cooling system zair or direct cooling system liquid cooling system mainly watercoolant is used and made to circulate through the jackets provided around the cylinder, cylinder head, valve ports and seats where it extracts most of the heat.
Clinker cooler with coanda wing technology more than 35 years of building clinker coolers and over 600 installations worldwide prove that the ikn cooler is at the forefront of technology. Analysis of oxyfuel clinker cooler operational performance. It was designed to air quench and cool large quantities of hot clinker rapidly, and to recover and return to the kiln a major portion of the heat from the clinker. In mcl, the available plc system for automation of various processes is that of allen bradley slc 504. The clinker travels on the clinker cooler bed where it is cooled by several clinker cooling fans.
Latest trends in clinker cooling cement lime gypsum. Development of cooling performance of clinker cooler. Pressure monitoring is required in the lower part of the clinker cooler to make the cooling as ezective as possible. Proposed work this section presents the three sub parts of proposed. The polytrack clinker cooler is a combination of a static, horizontal aeration floor and an abovefloor clinker conveying system.
Pdf assessment of energy and exergy efficiencies of a. Types of cooling system there are two types of cooling systems. Clinker cooling systems spm engmech india private limited. Clinker cooling systems offered by spm engmech india private limited, a leading supplier of industrial cooling system in vatva, ahmedabad, gujarat. Latest developments in high efficency clinker cooling. This paper studied the influence of the different water types on clinker properties. Pdf simplified modeling of clinker cooling based on long. Cement clinker cooler and method for cooling cement clinker 22 29. Development of cooling performance of clinker cooler process. The water types are nile, ground and deionized water. Consequently the installation efficiency can be defined as follows. Crossbar cooler for efficient clinker cooling flsmidth. Recommendations vary but it is generally accepted that with mill outlet temperatures of around 110. Boost your cooler performance and save money on spare copler.
In section 5 plc based ladder diagram for the automation of clinker cooling system is presented. Latest developments in high efficency clinker cooling stephan oehme claudius peters. Its convincing advantages are the very high clinker bed transporting efficiency and strict separation of the functions of transportation and aeration, due to. Application note ac drives ensure efficient and precise. The hot clinker next falls into a cooler which recovers most of its heat, and cools the clinker to around 100 c, at which temperature it can be conveniently conveyed to storage. Air cooling system in this type of cooling system, the heat, which is conducted to the outer parts of the engine, is radiated and conducted away by the stream of air, which is obtained from the atmosphere. It is a system applied to satellite coolers based on constant pressure water injection directed frontally inside the satellite tubes arranged around the furnace that rotates in solidarity with the aforementioned tubes. I want to get rid off the transport systems below the clinker cooler, there must be a solution for a system to safe my time and money i need a new clinker cooler, but i need production and i cant effort a long stoppage 2. The impact of cooling water types on the cement clinker. Virtuallab of a cement clinker cooler for operator trainingthis. Gypsum is then added to the composition and the cement clinker is ground down into cement powder, ready for storage, packaging and transport. Clinker cooling is achieved by passing air streams through the grates.
831 367 564 1564 972 595 918 1202 326 1565 451 419 1499 1090 515 1189 1545 35 1138 1243 673 532 953 434 89 121 910 1091 495 165 795 358 1200 910 827 983 1181