Cement silo

Cement silo

Cement silo, also called cement bin, cemnet container or cement storage silo, is widely used for storing cement in cement production plants. Flyer steel silos are all spiral silos with abundant technical strength and prominent performance. With unique, manufacturing method, professional equipment, mechanized operation, Flyer cement storage silo is famous for its solid structure and durability.Cement silos are on-site storage containers used for the storage and distribution of various types of cement mixtures. Spiral steel silos for storing cement cannot be removed and they are widely used in industrial production. Silos of this type come in a variety of sizes, making them ideally used in many cement plants. Flyer is a professional manufacturer that produces high quality spiral cement silos and provides service from design, manufacture to install fitting according to the clients' requirements.

Flyer Cement Silo's Features

• Long service life: The thickness of spiral seaming edge is five times of the original steel plate, which greatly strengthens the resistance of the loading and prolongs the service life of silos. In addition, the durable cement silos also guarantee a low maintenance cost.
• Short construction period: Our seaming machine can provide a 3-5m per minutes' shaping speed. A cement silo with a capacity of 1000 tons could be constructed within 5-7 days.
• Low investment: Compared with concrete silo, spiral cement silo only needs several people and seaming machine.
• Moisture resistance: Our silos are constructed by special bending equipment, and the steel bending is tight with good sealing property. Cement inside the silos can't be influenced by the outside environment like wind and rain, etc.
• Galvanized cement steel silo: The surface of galvanized steel silo is smooth and the cement can’t adhere to inside wall of silo in block.

Cement storage silo's working principle

• Before constructing the cement silo, the bottle base of the silo must be erected by a dedicated crane and be placed on the prefabricated concrete foundation. Check out the perpendicularity of the erected silo and weld the base bottom of the silo with the embedded foundation firmly.
• After the cement silo is constructed, cement can be transported into the cement silo by the pneumatic pressure of bulk cement truck if the transport pipe of cement truck connects with the feeding tube of cement silo.
• During the transporting process, the operator must press on the button of dust vibration motor to shake off the cement attached on the bag of dust catcher. Otherwise the cement may block inside the bag, silo explosion may occur.
• If cement block the bag, the pressure inside the silo exceeds the security pressure of the relief valve, the relief valve will open up immediately to release pressure inside the silo.
• Cement storage system is usually installed with material level measuring system, it shows where the position of cement.

How to build a steel silo?

1. Prepare the necessary equipment for building steel silo based on the diameter of the silo.
2. Build the steel storage silo to the height of 2 meters or more, and then build the silo's roof.
3. Install steel silo's roof: using cutting machine to make the silo roof horizontal and then install the silo roof
4. Build the steel silo up to the designed height, and then pull out the machine, drop the silo on the ground, make the silo body connects with pre-embedded parts in the ground.

Why choose Flyer cement silo?

• 1. Selecting superior materials: High intense hot rolled double galvanized coil are used to ensure steel silo's combination of stability, anticorrosion, air proof and good looking.
• 2. Short construction period: Short duration can be guaranteed for the onsite construction during the whole procedure and for our professional equipment can provide a 3-5m per minutes' shaping speed, so a cement silo with a capacity of 1000 tons could be done within 5-7 days.
• 3. Saving resources: Cost-effectiveness can be achieved for light sheets are used for the whole silo which made it just as heavy as the rebar of concrete silo. Comparably small coverage that could narrow the separation distance down to 500mm for maximized space utilization.
• 4. Wide range of cement silos' sizes: Flexible choices on dimensions are provided in a range of diameters from 3m to 28m, and a height of 35m in theory to meet various demands.
• 5. Advanced technology and equipments: High automation, advanced loading and unloading equipments provide you great convenience on operation and management. With abundant technical strength and prominent performance, Flyer Steel Silos are extensively applied in NSP cement production line as well as its corollary grinding station, and obtain a large market share.
• 6. Good reputation: High reputation among customers has achieved as more than 4000 steel silos have founded in China cement industry, and several NSP cement production lines have been set up for some large cement group like Tianshan Group, Qilianshan Group, Tongda Group, Washi Group and etc.

With advanced technology, unique manufacturing methods, professional equipment and mechanized operations, Flyer has successfully built many high quality steel silos. And Flyer will try its best to establish superior-quality steel silos to meet your own requirements, too! Feel free to contact us.

How to store fly ash in commercial fields?

FLY ASH STORAGE SYSTEM | STEEL FLY ASH STORAGE SILOS

Fly ash silo introduction

What is fly ash storage silo? A fly ash silo is a kind of tank that widely used in commercial fields to store industrial powder. Flyer is a professional manufacture which produces high quality steel fly ash silos in China. Flyer can supply complete silo equipments for ash collection such as aeration, venting, level measuring equipments and different kinds of discharging facilities. We can provide complete design from small steel silos up to big storage silos with capacity of 5000 m³ made of stainless steel. We have different types of designs for silo aeration to ensure flow out of the silos in a proper level. The type and capacity of the aeration system can be different depending on the size of the silo and the shape of the silo bottoms, such as traditional conical bottom, flat bottom, inside cone bottom etc. The discharging arrangement can be also different depending on the shape of the silo bottom portion furthermore how many outlets are required. It is certain that, a proper pressure is a main factor that affects the safety of fly ash silo, so the fly ash storage silos also have to be equipped with level switches, level measuring equipment, safety devices (over pressure/under pressure valves) etc.

Traditional manufacture of fly ash system

Flyer provides complete design and installation of dry fly ash collection, conveyance and storage systems that will replace the wet collection and slurry systems found at many powder plants. Using industry proven mechanical equipment, Flyer will design the collection system to maximize the use of existing mechanical collection equipment and provide dry conveyance systems to transport the fly ash to newly installed steel storage silos. Because of our hands-on experience in marketing and management of fly ash, we can deliver the right equipment to meet the plant’s needs for a reliable ash collection system. Flyer provides an economical package that includes a flexible mechanical system that accommodates efficiency for fast loading of conditioned fly ash. In addition, this system provides efficient loading for dry fly ash tankers where market needs dictate dry fly ash loading. Flyer’s broad base of experience in handling all types of fly ash and all types of mechanical equipments has taught our engineering team where the capital and operating costs can be saved through the proper selection and design of efficient dry fly ash systems. We know that time is money when it comes to fly ash handling and the system design can dramatically reduce the plant’s capital expenses and operating expenses.

Steel silo discharge facilities

For many smaller discharging capacities, rotary feeders are widely used. But for the fly ash silos we prefer to offer our fluid discharging system. This fluid discharging system is simply designed that consists of pneumatically operated cut off gate and manual or motorized flow control gate.

Main equipments for silo discharging:

• 1. dry unloading chute equipped with venting system for the proper dust free loading of tank-trucks or rail tankers, usual capacity range from 80 to 150 TPH
• 2. conditioning unloader for dust free loading of open trucks or belt conveyor

In the inlet chute of the conditioning unloader, it is a weight balanced feeder that arranged to prevent the vapor going counter direction of flow. In some cases, if too much air is forced to the conditioning unloader from the aeration system, the unloader has to be equipped with additional suction. On this condition, an additional suction fan and a wet scrubber are necessarily equipment.

Normal discharging capacity range:

• 1. for twin shaft type conditioning unloader: 40-300 TPH
• 2. for rotary drum type conditioning unloader: 40-450 TPH

Large fly ash storage silo station

For some big power plants, large fly ash storage silos are necessarily equipment.

The biggest EWB reference is an ash storage silo complex including 2x5000 m³ fly ash storage silos and a 2x500 m³ bottom ash silo with the engineering and supply of the following technological parts:

• 1.flat bottom fly ash silo with expansion chamber equipped with aeration panels and venting pipes
• 2. proper venting system
• 3. fly ash silo discharge from central distribution box to mixing equipment and dry unloading via flow control device, flow measuring device and air slides
• 4. bottom ash silo with vibration feeder discharging facility

Why choose steel silos for grain storage?

ADVANTAGES OF STEEL SILOS FOR GRAIN STORAGE

There are so many methods of grain storage, such as steel grain silos, concrete grain silos, storage warehouses, bag silos and so on. Among them, steel grain silos and concrete grain silos are most widely used in grain storage systems. Before planning a new storage project, all the companies have to think about a question: which kind of grain storage system should I choose? Building a concrete silo, a steel silo or even a warehouse? As an answer of these questions, we will point out the key differences between steel grain silos and concrete grain silos.

Production process

All parts of steel silos are manufactured in factories, so that the quality can be totally guaranteed and controlled, whereas cast in place concrete silos involve more variables such as concrete delivery and weather. When building a concrete grain silo, you should have to bear in mind the useful life of concrete before use is less than 2-3 hours. After this period, the optimal characteristics of concrete would be changed a lot, which causes unnecessary waste of resource.

Grain silo Design

The slip frame concrete process is further complicated by the fact it is a dynamic or continuous process. Rebar placement, concrete quality, etc., all affect the final product. Also, field supervision plays a really serious part in concrete silos: more people working on site, longer period of commissioning (due to weather conditions and environment conditions) and, ultimately, higher costs.

Concrete silos can be taller than steel silos but these ones have bigger diameters so the total capacity is highest. For this reason concrete silos are only more suitable when the space is really limited. It is easier to erect steel silos and also to install accessories like doors, ladders, samplers, etc.

Steel structure is more flexible, which promises steel silos have better behavior in case of earthquake. When earthquake is coming, concrete grain silos may fall into ruins because of the loose structure, while steel grain silos won’t. So to be safe, steel grain silos are suitable for different geographical environment.

Regarding airtight, both structures of steel silos and concrete silos are normally airtight if the openings are properly sealed.

Construction Cost

Steel silos generally give you greater storage capacity per dollar. They tend to be more cost-effective because of the higher storage capacity. While the price of steel is higher than concrete, the construction of steel grain silo is much easier than concrete grain silo. What’s more, low maintenance cost is an important reason to choose steel grain silo.

Aeration Treatment

It is easier and more effective to do aeration in steel silos. Aeration horsepower is a non-linear function of grain depth. It is often impossible or impractical to provide the same airflow in tall concrete silos that could be obtained in shorter and wider silos (the case of steel silos). A higher grain depth also leads to a higher heat of compression in the aeration system. This means it takes a lower outside temperature to achieve the same grain temperature, making early aeration more difficult.

Grain Silo Foundation

When building steel silos, you don’t need the silo to be enough firm to support the weight of structure. Sometimes steel silos can be built on land that doesn’t have the higher load-bearing capacity needed for concrete.

There are many details and variables in silo projects and every type of grain storage has pros and cons.  The right choice is the one that fits in your infrastructure strategy and practical requirements.

What should you do first before building steel silos?

THINGS YOU SHOULD CONSIDER DURING STEEL SILO MANUFACTURING PROCESS

Flyer steel silo, with its continuous development of more than 30 years, has been quickly spread and popularized all over the world. As a new type of silo, steel silo is widely applied in each link during the process of grain storage and transportation, and has successfully become a symbol of modernization in both bulk and storage of grain industry. All the above achievements depend on the three superiorities of its functions.

Economy: Steel silo keeps the lowest construction cost among all types of silos, both for the silo body and the foundation, which is only half of the construction cost of concrete silo and four fifths of the brick-construction structure. It will steadily decline due to the decreasing price of steel.

Adaptability: Steel silo enjoys excellent performance on mechanization and automation of grain storage, such as grain harvest and transport, monitoring, management as well as the ventilating and temperature management of the condition of stored grain.

Establishment: Steel silo enjoys high establishing for its simple requirement on foundation, quick construction speed on establishing, and free from natural elements’ effects. After having investigated on the superiorities of steel silo, customers list following suggestions during its manufacturing:

• Materials: Commonly, steel silo is manufactured by popular models steel. Steel Q235 is the best choice for its convenient in purchase and low in cost. If the calculation thickness of steel exceeds the production capacity of equipment, low-alloy steel will be a better substitute. What’s more the steel is usually galvanized to meet the requirement of anticorrosion. Therefore, zinc coating becomes a vital factor of steel silo construction, which will directly effect on its serving life. China keeps the same standard of zinc coating with foreign countries which is 400g per square meters.
• Style: Spiral steel silo and assembly silo are two prevalent styles of thin-walled steel silo. Both of them possess their own features due to their different structures.
  The features of spiral steel silos are:
  1. It is manufactured by hot dip galvanized sheet so that the color of its undercutting is evenly.
  2. It can be applied for storing liquid materials like water and oil for its excellent performance on air tightness.
  3. The sheet used for spiral steel silo should be thicker than that for assembly silo for its internal wall is lubricated.
  The features of assembly silos are:
  
  1. It can be manufactured by both hot dip galvanized coil or sheet and galvanized sheet. So it is more convenient on purchasing material.
  2. All the components of the assembly silo are standard, so they are replaceable if damaged or rusted during its serving life.
  3. It is developable and transferable which can best meet the special requirement of customers who are renting field.
  4. Its pillar can be installed outside, which is favorable for grain storage.
  5. It can meet the standard requirement of air tightness after caulking by silicone because its own air tightness is unideal.
  6. It can be manufactured as double insulation construction with little increase on cost.
• Foundation: Basically, there are two types of steel silo foundation, plat form and hopper. Plat foundation silo is widely applied in steel silos of larger diameter which sweeper should be installed on the bottom inside. Plat foundation steel silo is featured by easy constructed and lower cost. Meanwhile, hopper foundation steel silo enjoys great popularity when customers are considering about grain unloading artesian. There are three hopper types like full steel hopper, semi-steel hopper, and cement hopper. Generally, there is no big difference in application of these three different hopper types. However, a special type of cement hopper constructed by backfilling, although requiring much easier construction process, is a big waste on raw material and silo capacity and requires a large civil engineering quantity.

As suggested above, customers should take comprehensive consideration before making choice to maximize the function price ratio and to perfect the investment results.

Steel silos in America

STEEL SILOS BRING GREAT CONVENIENCE TO AMEREICA

Current Economic Situation of America 

Since 2012, economy of the United States has maintained moderate growth continually. At the same time, industrial production and retail, household income, real estate prices are recovered, but the overall economic growth is lower than market expectation. GDP growth rate of the first, second and third quarter of 2012 is respectively 2.0%, 1.3% and 3.1%, while the unemployment rate is 7.8% in December, lower than 8% for four years. In addition, the economy of America is still facing many internal and external problems such as the uncompleted leveraging situation, insufficient investment and low consumer confidence, peaking debt, repeated attacks of European debt crisis and the slowed emerging economies.

The current overall economic has shown stabilization and recovery, but the recovery process is still twists and turns. In the third quarter of 2013, American GDP grew at the annual rate of 2.8%, which is slightly higher than the average growth rate since 2009.  Real GDP for the whole year is expected to reach $16.9 trillion. From January to September in 2013, the national price levels keep basically stable, the job market continues to improve, the unemployment rate dropped from 7.9% in January to 7.3% in October, and the estate market continues to rebound.

The U.S. department of labor predicts that from 2010 to 2020, GDP is expected to reach the annual growth of 3.0% averagely, which would be higher than the average annual GDP growth of 1.6% from 2000 to 2010.

Steel Silos Are Widely Used in America 

Americans mostly use galvanized corrugated sheet fabricated steel silos. From the early stage of the construction to the later maintenance, steel silo construction process has excellent technical support. Many Americans believe that prefabricated steel silo can be demolished, maintained conveniently and conducive to resource recycling.

The US molding technology of fabricated steel silo has a full set of technology, special equipment production line, and the strength, performance, safety of the steel silo are all reliable. Construction of the corrugated sheet fabricated steel silo were fabricated parts with convenient door, straight ladder, test tank and big fan, etc.

The use of spiral occlusal type is less than the usage of corrugated steel silo. Emerging glass melting steel (toughened glass) and epoxy coating technology make warehouse physical fit most of the special environments.

Silo storage is very popular in the United States. Silos are variable in size, small silos can be storage tanks, while large bins are likely to store thousands of tons of cargo. With mature technology, silos are widely used in the United States, not only used for storage, but also used for the processing and handling of freights stored in the bins, or used as a work of art viewing.  At the same time, maintenance of silos is also quite appropriate. There are special companies to maintain and repair storage silos, which brings much convenience to the repairment of silos.

Application of Steel Silos in the United States

Agriculture

The steel silo are mainly applied to store grains like barley, corn, soybeans, wheat, sorghum, rice, sunflower seeds, palm kernel and other bulk granular crops. At present, 95% of America's silos are steel silos, and the technology of fabricated grain steel silo is quite mature. Problems such as the humidity, temperature control, the machinery weight weighted have been solved. There are also silage silos, the slurry storage bins and nutrient storage bins, etc.

Biomass Aspects

Steel silos are also used for cooking biomass and storage of fuel and biomass.

Industry

The steel silos are used to store liquid, liquid chemicals, minerals, fluid processing, jewelry processing, etc.

Petroleum Chemical Industry 

Silos can be used in oil processing, the storage of crude oil and refined oil, etc.

Wastewater aspects

Steel silos are for the storage and circulation of industrial wastewater, municipal wastewater and the leach liquor.