rotary cooler - cement cooler | agico cooler in cement plant

rotary cooler - cement cooler | agico cooler in cement plant

Rotary cooler is also called clinker cooler, which is the important support equipment of cement rotary kiln. It is mainly used to cool the high-temperature clinker1000-1200discharged from the rotary kiln into an appropriate temperature (less than 200). The cold air produced by it contact countercurrent with the clinker in the cylinder and generate heat exchange, then they will enter the rotary kiln as combustion air to optimize the calcination process and reduce heat consumption.

The rotary cooler produced by AGICO has the advantage of simple structure, high heat efficiency, low maintenance cost, less total investment, etc., which are often used to cool the clinker of 500 ~ 2000t/d cement production lines. Besides, we also offer conveying equipment, feeding equipment, and other related cement equipment according to customers requirements.

AGICO is an innovative supplier of different kinds of cement equipment. We combine industry expertise with new technology to deliver the best solutions to cement plants. Rotary cooler is one of our hot-sale devices. It provides a great solution for high-efficiency clinker cooling. Built on dependability and proven technology. Whether you require short or long residence times, carbon steel or specialty steels, AGICO can customize the rotary cooler for your application.

AGICO Group is an integrative enterprise group. It is a Chinese company that specialized in manufacturing and exporting cement plants and cement equipment, providing the turnkey project from project design, equipment installation and equipment commissioning to equipment maintenance.

clinker cooler - cement cooler | agico cooler in cement plant

clinker cooler - cement cooler | agico cooler in cement plant

In the calcination process of cement clinker, preheating, calcining, and cooling are three inseparable process links. As the supporting equipment of cement rotary kiln, clinker cooler (also called cement cooler) is a kind of heat exchange device that transfers heat from high-temperature clinker to low-temperature gas. It plays an important role in the cement clinker production process and directly affects the cement product quality.

Cement coolers can be divided into the rotary cooler, grate cooler, vertical clinker cooler and more. While the rotary cooler and the grate cooler are now the most commonly used cement equipment in the cement plant.

Rotary Cooler: rotary cooler is the earliest used one in the cement plant. It is similar to the cement rotary kiln in appearance and equipped with refractory lining and material lifting device inside. The high-temperature clinker enters into the cylinder from one end, contacts with the cold air from the other end under the action of the lifting device, meanwhile carries out heat exchange. It is t is usually arranged under the cement rotary kiln, with a diameter of 2.0-5.0m, a length of 20-50m and a slope of 3-4%.

Grate Cooler: grate cooler is a kind of cement cooler that cools the clinker at a rapid rate. The temperature of clinker is reduced by cold air passing through the horizontally moving material layer from the bottom in a vertical direction. According to the movement of grate, grate coolers can be divided into rotary type, vibrating type, and reciprocatinggrate type.

AGICO is a cement equipment manufacturer in China. Our rich production and export experience make our products of high quality and reasonable design. We provide attentive service and reasonable quotation which makes we are well received by overseas customers.

AGICO Group is an integrative enterprise group. It is a Chinese company that specialized in manufacturing and exporting cement plants and cement equipment, providing the turnkey project from project design, equipment installation and equipment commissioning to equipment maintenance.

cement rotary kiln, rotary kiln | cement kiln | agico cement

cement rotary kiln, rotary kiln | cement kiln | agico cement

Cement Rotary kiln, is one kind of lime kiln, belongs to building material equipment. The rotary kiln has wide applications, such as metallurgy, chemical industry, cement, refractory materials, lime, environmental protection and other industries.

Cement rotary kiln, also called clinker kiln, can be divided into dry-process cement kiln and wet-process cement kiln according to the cement production technology. Dry-process cement rotary kiln is mainly used to calcine cement clinker. As the core equipment of NSP cement production line, cement rotary kiln is consist of shell, supporting device, transmission device, lubrication device, moving kiln head, sealing device for kiln tail, burning device and etc. dry-process cement rotary kiln has advantages of simple structure, reliable operation and easy to automatic control in the cement production line.

AGICO Cement is one of leading cement plant manufacturers offers cement kiln and other cement equipment, our cement rotary kiln has been widely applied to many cement plant. Based on 60+ years experience and advanced production equipment, we can provide EPC project and custom-designed solution to cement manufacturing.

Cement rotary kiln is a piece of cement equipment with strong durability, also plays a vital role in the cement plant. If you find any problem in the operation, solve it immediately. In general, the maintenance of rotary kiln is a complex process, here are some tips will be helpful.

First of all, check the fire hole of the rotary kiln is closed or not, ensure the close state to avoid too much cold air. Then, check the windshield of the burner at the kiln door is close to the kiln door. If the air leakage is not closed, it should be pushed to the position of close contact with the kiln door. Third, check the door cover of rotary kiln, if there is the phenomenon of positive pressure ash, should inform the central control to adjust properly. Finally, remember to check air leakage or wear out the phenomenon of resistant material, when you find the above problems, promptly inform the relevant leadership to deal with them.

Check the fish scales sealed in the kiln head, and then check the fitting condition of the fish scales in the rotary kiln and friction ring. If there is any bad condition such as non-fitting, the weight should be adjusted by tightening the device to make it fit. If there is too much aggregate in the reliable rotary kiln, the discharging pipe should be adjusted timely. After that, check the wear condition of the friction ring of rotary kiln. If the friction ring is found to be badly worn or worn out, replace it.

Check the cooling air at the kiln head, and then check the friction between kiln head and the kiln door cover. In order to ensure safety, check the oil film contact of the supporting wheel shaft and thrust plate one by one. Check oil level, oil scoop and oil distribution of rotary kiln. Next, check whether there are impurities, water droplets, oil leakage, collision, loosening and other abnormal conditions, if necessary, the temperature can be measured and control.

The service life of rotary kiln is affected by many factors, such as quality, regular maintenance, etc. AGICO CEMENT ensures the quality of the rotary kiln by strict quality control and advanced technology. Besides, regular maintenance can prolong the useful life of your rotary kiln.

Yes, in order to prevent cold air from entering the rotary kiln and smoke dust from spilling out of the cylinder, the rotary kiln is equipped with a reliable sealing device for the inlet end (tail) and an outlet end (head) of the cylinder, ensuring the sealing performance of the rotary kiln.

The cement rotary kiln produced by AGICO has been optimized and added with e dust filter products for environment protection, which is a new type of environmental protection equipment to reduce the environmental pollution caused by industrial production.

rotary cooler | clinker cooler in cement plant | agico cement

rotary cooler | clinker cooler in cement plant | agico cement

Rotary cooler is one kind of cement cooler applied for cement manufacturing plants. As an essential part of the cement kiln system, a rotary cooler is used to cool the clinker discharged from the cement rotary kiln. The rotary cooler also helps air to absorb the large amounts of heat carried by clinker, heating the combustion air up to the high temperature, strengthen the calcination, and reduce the energy consumption.

In cement production line, most of the cement raw materials must be broken, such as limestone, clay, iron ore and coal. Finally, cement clinker coolers cool the high temperature clinker discharged from rotary kiln and convey to storage silo and cement grinding plant.

Cooler is a kind of refrigeration equipment that is realized by vapor-compression or absorption cycle, the liquid can flow through the heat exchanger to reach for the purpose of the cooling air or equipment, high-temperature clinker enter into the cooler from the feeding device, cooler rotate to drive sufficient heat exchange between material and the air, at the same time as the kiln body keep rotating according to the design of slope and speed, the material is periodically rolling forward in the kiln, thus the raw material is conveyed from feeding end to discharging end, and ensure the material can be cooled to below 200 in a certain time.

The rotary cooler is mainly composed of a rotating barrel with a gradient of 5% and a diameter of 1.5 meters and a length of 12 meters. It is equipped with a lifting plate. The cylinder body is supported on the baffle wheel device with the help of a bracket at 2.5 meters away from both ends. The lower bracket is in rolling contact with the baffle wheel to prevent the cylinder body from axial sliding. The rotation of the barrel is driven by a set of transmission devices.

The clinker is raised several times in the lifting area and distributed evenly, and the cooling air has strong heat exchange with the hot clinker. Especially in the low-temperature area, the contact time between clinker and cooling air can be increased by improving the structure and layout of the lifting plate as well as adjusting the slope and rotating speed of the cylinder, and the moving speed of the clinker can be controlled so that the heat inside the clinker has enough time to conduct to the surface, the heat of the clinker with low temperature can be recovered fully.

clinker cooler, cement cooler, grate cooler | clinker production

clinker cooler, cement cooler, grate cooler | clinker production

The clinker cooler, also known as grate cooler or cement cooler, it is a necessary equipment of cement clinker production. The clinker cooler is mainly used to cool and transport the cement clinker. At the same time, cement cooler also provide hot-air for rotary kiln and calciner, it is the main equipment of heat recovery for burning system.

The cooler will make a sufficient heat exchange between the clinker (1000-1200) from the rotary kiln and air by cooler rotating, so that the material can be cooled to (below 200), and improve the clinker quality and grindability, our clinker cooler with the features of simple structure, high transport rate, easy operation and maintenance.

The traditional grate cooler can be divided into rotary cooler, vibrating clinker cooler and push clinker cooler. The grate bed is the core part of grate cooler. The push type grate plate is made up of fixed grate plate and moved grate plate by radial arrangement.

The grate cooler is a type of quench cooler. After the cement clinker enters the cooling machine from the rotary kiln, a layer of a certain thickness is laid on the grate plate, and the blasted cold air is passed through the layer moving in the direction perpendicular to each other to quench the clinker. The clinker is quenched from 1300-1400 C to below 100 C in a few minutes.

The cold air for cooling clinker is supplied by a dedicated fan. The clinker is spread on the grate plate with a certain thickness, and continues to advance with the movement of the grate plate. The cold air flows from the squat down and perpendicular to the direction of clinker movement through the layer, so the thermal efficiency is high. The cooling speed of the vibrating clinker cooler is fast, and the clinker can be cooled to 60~120C in 5~10min, which is beneficial to improve the quality of clinker.

grate cooler clinker cooler | agico grate cooler in cement plant

grate cooler clinker cooler | agico grate cooler in cement plant

Grate cooler, as a quench type clinker cooler, is the important cement equipment in the clinker calcination system. Its main function is to cool and transport cement clinker. Meanwhile, provide hot air for cement rotary kiln and precalciner.

There are various types of clinker coolers developed before grate cooler: shaft cooler, rotary cooler, etc. Compared with them, grate cooler is the most suitable one for cement production lines with high outputs and usually designed forlarge cement kiln capacity that up to 10000 t/d.

HCFC reciprocating grate cooler is one of the hot-sale grate coolers produced by AGICO. It is a kind of large hydraulic controlled grate cooler that transferred from simple speed control to speed and stroke control (i.e. PLC control). It has high efficiency of heat recovery and cooling, long service life, low energy consumption, high operation rate, and stable system operation, widely used in cement plants.

AGICO Group is an integrative enterprise group. It is a Chinese company that specialized in manufacturing and exporting cement plants and cement equipment, providing the turnkey project from project design, equipment installation and equipment commissioning to equipment maintenance.

kiln cooler for cement rotary kiln of dry process method

kiln cooler for cement rotary kiln of dry process method

In recent years, with the improvement of large-scale cloth bag dust collecting technology in China, the long bag dust collector technology used in rotary kiln tail gas treatment of cement rotary kiln with dry process method is increasing day by day. The high temperature exhaust gas from the rotary kiln end needs to be cooled to below 250 before it enters the long bag dust collector. Kiln Cooler Types of rotary kiln tail gas can be divided into two categories: one is mixed with cold air, the other is cooler.

Old-type small dry rotary kilns are mostly the former. Mixing cold air is simple and easy, less investment, but high energy consumption. In recent years, various forms of rotary kiln tail gas cooler (kiln cooler)have been developed in China, which play an important role in improving the efficiency of long bag dust collector.

Rotary kiln tail gas cooler is a kind of equipment for heat exchange between 2 kinds of fluid medium with different temperature in mutual isolation. Different from other heat exchangers, the hot medium has higher temperature, lower density, higher flow rate and higher dust content, which brings some difficulties to design and manufacture.

Until now, there are mainly 2 categories and 4 types of air coolers in China. According to the cooling medium, it is divided into water cooler and air cooler, and air cooler is divided into forced ventilation type and natural ventilation type. The forced ventilation type is divided into axial flow type and centrifugal type according to the flow direction of the cooling medium and the different fan. In all 4 types of waste gas kiln coolers, the hot waste gas is forced to flow in the pipe from top to bottom. The cooling medium flows outside the pipe for convective heat transfer.

In the water cooler, the cooling water flows through the confined space between the shell and the hot tube from bottom to top, with a slower flow rate, and the heat exchange form with the hot exhaust tube is laminar flow heat exchange. Although the heat transfer coefficient is lower than the turbulence state of the same medium, the heat transfer coefficient of the water cooler is still much higher than that of the air cooler, which is about 200 times higher than that of the air cooler, because the density of water is much higher than that of the air cooler.

The cooler has no closed shell, the hot exhaust pipe is exposed to the atmosphere, and the cooling medium is ambient air. The heat exchange mechanism is as follows: the air in a thin layer adjacent to the tube wall surface is heated, the temperature rises, the density decreases, and thus flows upward along the hot surface. The air temperature decreases with the distance from the heat pipe surface. After a certain distance from the surface, the air temperature does not change, but is the same as the atmosphere temperature. The heat transfer coefficient is small because the cooling air velocity is slow and the air density is low. Therefore, only by increasing the heat transfer area can the heat transfer effect be improved. This kind of cooler equipment is huge, but there is no power consumption.

The cooler has an incomplete enclosure. In a cooler using an axial flow fan, several axial flow fans are arranged along a hot row on one side. Both sides of axial flow fan are shielded by shell. Cooling air passes horizontally through several rows of heat pipes. In the centrifugal ventilator cooler, there is a closed shell all around, leaving only the inlet and outlet in the upper and lower parts. The cold air is blown in from the lower part by one (or two) fans, and after the countercurrent heat transfer along the direction of the row pipe, it flows out from the opening of the upper shell. Due to forced ventilation, the flow rate is high, generally above 12m/s, so the cold air flow belongs to the turbulence range. Convection heat transfer is the main form of heat transfer. The main factor determining the heat transfer strength depends on the thermal resistance in the boundary layer. The higher the air velocity is, the thinner the thermal boundary layer is, the smaller the thermal resistance is, and the stronger the heat exchange capacity is.

AGICO supplies 2 types of kiln cooler equipment for cement production line, one is grate cooler, the other is rotary cooler, grate cooler is more efficient in cement plant, rotary cooler is suitable for many other industries.Grate Cooler is a type of quench cooler. Its works by quenching clinker which is laid in levels on the grate plates with cold wind from air blower. Grate clinker temperature will be rapidly dropped from 1400 C to be less than 100 C. Plenty of waste gases after cooling could not only be used as secondary air in the rotary kiln, but also be heat source for drying coal in the coal mill.

In recent years, with the improvement of large-scale cloth bag dust collecting technology in China, the long bag dust collector technology used in rotary kiln tail gas treatment of cement rotary kiln with dry process method is increasing da...

Cyclone preheater is one of the core equipment in the new dry cement production process, which is responsible for many functions such as gas-solid dispersion, material heating, gas-solid separation, material transportation and some physical...

cdwy electric precipitator

cdwy electric precipitator

The Pengfei EPC cement production line project includes services such as process design, equipment supply (including mechanical and electrical parts), civil engineering, installation and commissioning, trial operation, reaching production standards, and final delivery. Mechanical equipments include limestone crushing and conveying, clay crushing, and auxiliary raw material pre-homogenization yard, raw material batching station, raw material grinding and waste gas treatment, raw material homogenizing warehouse and raw material entering kiln and firing kiln Tail, firing kiln and tertiary air duct, firing kiln head, clinker transportation, clinker storage and transportation, cement batching station and clinker bulk, gypsum, crushing and transportation of mixed materials, cement grinding and transportation, cement storage And transportation, cement packaging, bagged cement loading, cement automobile bulk, machine repair workshop and sum material warehouse.

Description The cement grinding station with an annual output of 1 million tons adopts the technology of separately grinding clinker and slag, among which the clinker grinding adopts the combined grinding process composed of two 4.2m 13m cement mills. The production process of the grinding station is stable, achieving the goal of high quality, high yield and low consumption.

Our tube grinding mill is typically designed for grinding different kinds of ores and many other grindable materials, and it can be widely used in building materials, metallurgy, chemical industry, electricity industry, and many other industrial or mining fields. It can be used for open circuit grinding, and when used in conjunction with powder classifier, it can also be used in circulatory closed-circuit grinding. Our tube grinding mill can be used in dry production line as well as wet production line, and the grinding process can be accompanied by dry process. And it has advantages of strong material adaptability, strong continuous production capacity, big crushing rate, and it is easy to adjust the grinding fineness.

This 600tpd active lime production line is a complete line that includes vertical preheater, rotary kiln, grate cooler, air treatment system, raw material conveyor system, finished product conveyor system, raw coal grinding system, and so on. DCS central control system is employed to make concentrated operation management.

As the main equipment in both of the cement clinker dry and wet process production lines, this cement rotary kiln is widely used in metallurgy field, Cement Rotary Kilnchemical industry, building refractory material sector, environmental protection field, and so on. It mainly consists of cylinder body, supporting device, supporting device with catch wheel, driving device, movable kiln head, sealing equipment of the kiln end, coal spraying pipe, etc

Our TQT rotary drum granulator is an essential machine for compound fertilizer production. Its granulation ratio is as much as 70%, and its granulated products have strength more than 10N. Besides, its products have even nutrients, and strong adaptability. It can also be used in the production line of compound fertilizers used to supplement water for soils.

The 2500t / d cement clinker production line adopts a new dry process, with an annual output of 775,000 tons of cement clinker and a total cement output of 1.05 million tons / year. A cement production line and auxiliary facilities from limestone crushing to cement packaging are constructed. Specialties include raw materials, production technology, electrical and automation, water supply and drainage, HVAC fire protection, building structure, environmental protection, etc. Cement products are calibrated according to Chinese standard ordinary portland cement.

Pengfei 5000t/d dry process cement production line is excellent in saving energy. It adopts various high efficient cement equipment and devices. It is designed with a smooth and tight process flow.e try to reduce production process and save transport cost. High-accuracy measuring equipment is adopted to reduce raw fuel waste and product loss. This cement production line is eco-friendly

cement rotary kiln - rotary kiln - rotary kiln manufacturers | agico

cement rotary kiln - rotary kiln - rotary kiln manufacturers | agico

Cement rotary kilns refer to cement rotary calcining kilns (sometimes called rotary furnaces). It is a pyroprocessing device used to heat materials to high temperatures in a continuous process. The kiln body is a cylinder vessel with a certain degree of tilt to the horizontal level. Raw materials are fed into the vessel from the upper end and moved to the lower end, being stirred and mixed relying on the inclination and rotation of the kiln. The kiln burner produces a lot of heat by burning fuel. This kind of heat is usually transferred to materials through flame radiation, hot gas convection, kiln brick conduction, etc., which causes the chemical reaction between raw materials and finally forms clinker.

Rotary kilns can be divided into cement kiln, metallurgical and chemical rotary kiln, lime rotary kiln and so on. Cement rotary kilns are used for calcining cement clinker in the cement plant, which can be divided into dry cement kiln and wet cement kiln. Metallurgical and chemical rotary kilns are mainly applied in the metallurgical industry. As for the lime rotary kiln, it is the main equipment for calcining active lime and light burned dolomite used in iron and steel plants, ferroalloy plants, calcium carbide plants, and magnesium metal plants.

The cement rotary kiln is mainly composed of cylinder, supporting device, drive gear, refractory lining, catch-wheel device, kiln head sealing device, kiln tail sealing device, kiln hood, and other components. On the cylinder, there is a large gear ring fixed with a spring plate near the kiln tail, some pinions below are engaged with it, jointly forming the drive gear. In normal operation, the main drive motor will transfer power to this gear device through reducer to run rotary kiln. The raw material usually enters the rotary kiln from the upper end and move slowly to another end along with the chamber as it rotates. In this process, raw materials will be heated by high temperature and then decompose and produce chemical reactions so that their state finally changed. Under normal conditions, the heat source of indirect fired rotary kilns is supplied from the kiln burner outside the kiln. This kind of way protects the integrity of raw materials, while the heat source of the direct-fired rotary kiln is inside the kiln. Besides, the rotation speed and temperature of the cylinder are tightly controlled and changed according to different desire processes and material applications. After the calcination is completed, the clinker will be pre-cooled in the chamber and then be sent into the cooler for further cooling.

AGICO Group is an integrative enterprise group. It is a Chinese company that specialized in manufacturing and exporting cement plants and cement equipment, providing the turnkey project from project design, equipment installation and equipment commissioning to equipment maintenance.

how does clinker cooler reduce cement production energy consumption

how does clinker cooler reduce cement production energy consumption

Energy-saving and emission reduction is the development trend of cement production industry. To reduce energy consumption can not only reduce the production cost of cement plant, but also reduce the environmental pollutants produced in the cement production process and slow down the global warming.

The cement calcining system mainly reduces energy consumption by saving coal and power. It is generally believed that in order to reduce energy consumption of the clinker production line, improvements should be made in the preheater outlet temperature, cooler outlet temperature, and clinker temperature out of the cooler.

The clinker cooler is a key device in the clinker production line. It quenches and transports the hot clinkers discharged from the rotary kiln, and supplies hot air for the rotary kiln and preheater system. As the first equipment where high-temperature clinker releases heat, it plays an indispensable role in reducing coal and power consumption, increasing secondary and tertiary air temperature, and improving heat recovery rate.

A good clinker cooler can help cement plant reduce energy consumption from two aspects: one is to improve the cooling efficiency and reduce the power consumption of clinker cooler itself; the other is to reduce the coal consumption of rotary kiln and preheating system by improving the heat recovery rate.

The reciprocating grate plates are composed of the alternatively arranged fixed grate plates and movable grate plates. Driven by the transmission device, the movable grate plates located between the fixed grate plates in a row make horizontal reciprocating movement to push the clinker forward.

The quenched clinker is then screened. After that, small pieces fell into the conveyor for transportation; large pieces are crushed into small pieces by the crusher and cooled another time before entering the conveyor.

In a reciprocating grate clinker cooler, the cooling of the clinker on the grate bed can be divided into three sections: high-temperature section, medium-high temperature section, and low-temperature section.

The high temperature section quenches the clinker and increases the temperature of the secondary and tertiary air; the medium-high temperature section is the heat recovery zone; the low temperature section can further cool the clinker and reduce the clinker temperature out of the clinker cooler.

The cooling air is blown in by fans in each section. The air intake of the high temperature, medium-high temperature, and low-temperature section accounts for 31%, 50%, and 19% of the total air volume respectively.

After heat exchange, the air volume distribution of clinker cooler is as follows: the secondary air into the kiln accounts for about 15% ( air temperature is about 1050 ); the tertiary air into the calciner accounts for about 22% (standard condition and air temperature is about 950 ); the rest is discharged as exhausted gas.

The main power consumption of a clinker cooler is its cooling fans. It usually takes 1.9-2.3 m3 under standard conditions to cool 1 kg clinker from 1400 to 65 , and the power consumption of the whole system is about 7 kWh. If the air consumption per kilogram of clinker cooling is reduced from 2 m3 to 1.7 m3, the air consumption efficiency will be 15% lower than that of other cement plants, thus saving 2 kWh of electricity for the whole cement production process.

In the whole process of clinker calcination, it needs 50-55 kg coal to generate enough calorific value for the calcination of 1 ton of clinker. How to effectively recycle this heat is the key to save coal consumption.

Raise the temperature of tertiary air can save coal consumption to a certain degree. At present, the tertiary air temperature of most cement plants calcining systems in the world is around 900 . By reforming the clinker cooler to improve the reduction efficiency of the internal air, the temperature of the tertiary air can be increased to 1000-1100 (equivalent to about 3-3.5kg of standard coal), so as to improve the heat recovery efficiency of the whole calcining process.

If the material layer is too thick and the air volume is too small, the clinker will not be fully quenched, which causes the temperature of the clinker and exhaust gas to be too high, and the material on the grate bed is easy to stack. This will not only decrease the cooling efficiency and heat recovery rate of the clinker cooler, but also decrease the temperature of the secondary and tertiary air, increase coal consumption. Therefore, it is crucial to maintain a proper thickness of the material layer.

rotary cooler for small cement plants | rotary drum coolers | agico

rotary cooler for small cement plants | rotary drum coolers | agico

As a top cement equipment manufacturer in China, AGICO has successfully designed and set up several rotary cooler projects in domestic cement plants and earned a good reputation in the industry. The attached devices, capacity, and material of our rotary coolers can all be customized to fit your business needs, quote now for a detailed project plan.

In order to provide clients with the best quality rotary coolers, AGICO always adopts the most advanced design and technology to manufacture its product machines. We are confident that every single rotary cooler made by us has the following advantages:

The rotary cooler is the earliest invented cooling device that used in rotary kiln systems. In recent years, in order to adapt to the large-scale trend of cement production lines, the traditional rotary cooler technology has been constantly upgraded and improved.

With the successful development of a new type of high-efficiency material lifting device and the continuous improvement of refractory lining and thermal insulation materials, the heat exchange efficiency of rotary coolers has been greatly improved.

The main body of a rotary cooler is a rotary drum cylinder which is set at a slight horizontal slope. In the cylinder body, there are flights attached to the inner wall. Tyres and riding rings are mounted on the outside of the drum cylinder for its support and rotating.

In the clinker production process, hot clinkers discharged from rotary kilns enter the rotary cooler drum body through the feeding inlet. Under the combined action of cylinder rotation and gravity, the material moves slowly along the cylinder wall to the discharge port at the low end.

The cold air generated by the cooling fan moves from the lower end of the cylinder to the upper end. When it meets with the convective material, thermal energy is transferred from materials to airflow. Bearing the heat of materials, the cooling air is discharged from the upper exhaust outlet and recycled back to the rotary kiln as secondary air.

The flights on the inner wall continuously lift and sprinkle the materials with the rotation of the drum cylinder, so as to make the materials fully contact with the cold air and accelerate the cooling process.

application of esp for gas cleaning in cement industry with reference to india - sciencedirect

application of esp for gas cleaning in cement industry with reference to india - sciencedirect

Electrostatic precipitators (ESP) are used for gas cleaning in almost every section of cement manufacture. Application of ESP is studied, keeping in view Indian conditions. The characterisation of dust emissions has been done for different units, such as rotary kiln and raw mill, alkali by-pass, clinker cooler, cement and coal mill, in terms of exit gas quantity, temperature, dew point, dust content and particle size. It is seen that all these characteristics have a wide range of variance. The ESP system must effectively deal with these variations. The fundamental analytical expression governing the performance of ESP, i.e. the Deutsch equation, and that for particle migration velocity, were analysed to predict the effect of major operating parameters, namely particle size, temperature and applied voltage. Whereas the migration velocity (and the efficiency) varies directly with the particle size, it is proportional to the square and square root of applied voltage and absolute temperature of the gas, respectively. The increase in efficiency due to temperature is not seen in dc based ESP, perhaps due to more pronounced negative effect on the applied voltage due to the increase in dust resistivity at higher temperatures. The effect of gas and dust characteristics on the collection efficiency of ESP, as seen in the industrial practice, is summarised. Some main process and design improvements effectively dealing with the problem of gas and dust characteristics have been discussed. These are gas conditioning, pulse energisation, ESP-fabric filter (FF) combination, improved horizontal flow as well as open top ESP.

Generally, gas conditioning entails higher operating and maintenance costs. Pulse energisation allows the use of hot gas, besides reducing the dust emission and power consumption. The improved horizontal flow ESP has been successfully used in coal dust cleaning. The open top or vertical flow ESP has a limitation on collection efficiency as it provides for only one electric field.

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