Nowadays, when it comes to rotary lime kiln production line for lime calcining plant, people want the production line to be of high production capacities with low operating and capital expenditure. Besides, there are also mounting requirements for environmental protection. For these reasons, there are urgent needs for existing lime calcining plant upgrade. Daswell machinery offers not only new quicklime plant with modern rotary lime kiln systems, but also provides services to retrofit existing plants. And the preheater and cooler systems are important components of a modern rotary lime kiln production line.
Lime Calcining Plant
Lime calcining plant or quicklime plant is a complete production line for limestone calcining to produce quicklime. Quicklime is a versatile industrial mineral widely used in steel making industry and other industries. Generally, there are two kinds of kilns to calcine limestone: one is rotary lime kiln and the other is vertical lime kiln. Rotary lime kiln is suitable for high capacity of quicklime making plant. But it is also beset with questions about large losses of heat due to the long lengths of rotary lime kiln, high energy consumption and uneven quality of quicklime, and so on. However, there are great needs for rotary lime kiln with high capacity but low energy consumption and low costs.
Daswell Quicklime Plant Optimization
Daswell machinery is a professional manufacturer of quicklime production plant with both rotary lime kiln and vertical lime kiln lines. Daswell offers tailored turnkey solutions for lime calcination plant, including designing and planning of quicklime plant, providing quality complete set of equipment. Dswell has rich experience and professional expertise in dealing with setting up lime calcining plant, and we have finished several successful quicklime plants projects around the world. In fact, daswell machinery provides not only new lime calcining plant but also offers services to revamp existing quicklime plants. We will examine the entire lime calcining plant to upgrade the lime plant hardware and software infrastructures. As a result, we can improve the quicklime plant operational efficiency, increase profitability and reduce risks of existing lime calcining plants.
Lime Production Plant Retrofit Process
With rich experience and innovation solutions, Daswell machinery helps our customers in improving quicklime plant operational efficiency, increasing production capacities, reducing energy consumption, and lowering capital investments. Here are several ways to renovate existing lime plants with rotary lime kilns.
- Preheater and cooler system. Daswell provides high quality vertical preheater and vertical cooler system for lime plant with rotary kiln. Daswell vertical preheater and vertical cooler are great heat recovery equipment, which can use the hot gases in the rotary lime kiln for the best. For the vertical preheater, it can preheat limestone feed with hot air process from the rotary lime kiln before metering the limestone for final calcining. In this way, the vertical preheater can partially calcine the limestone which can in return improve production capacity as well as uniform quality of the quicklime. Besides, the vertical preheater can use the most of the hot gases in the rotary lime kiln for saving energy. As for Daswell vertical cooler, on one hand, it cools down the quicklime for further handling. On the other hand, during the process of cooling the quicklime, hot air will be produced and be transferred to the rotary lime kiln for heating. In all, the vertical preheater and vertical cooler with rotary lime kiln will improve production capacity, increase operational efficiency and reduce energy consumption. What’s more, with preheater and cooler, the lime rotary kiln can be shortened in lengths, which in return can save capital investments.
- Efficient firing system. Daswell offers advanced firing system for lime calcining plant. The burner will burn fuel efficiently. And there is a wide range of options in regard of fuel. For example, Daswell firing system can use coal, oil, natural gas, and other fuels. And it is easy to make conversions in choosing different fuels.
- Dust collectors and other systems. In fact, to improve energy efficiency of lime plant, all auxiliary units must work properly. So except for the core components, such as vertical preheater and vertical cooler, Daswell also provides efficient dust collectors, conveying systems and other machinery to make replacements of existing lime calcining plants.
| Capacity (t/d) | 150 | 200 | 250 | 300 | 400 | 500 | 600 | 800 | 1000 | 1200 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Limestone | ||||||||||
| Vertical Preheater | 4 Pusher head | 6 Pusher head | 8 Pusher head | 12 Pusher head | 14 Pusher head | 18 Pusher head | 22 Pusher head | ||||
| Rotary Kiln | Kiln Size (m) | ø2.5×40 | ø2.8×42 | ø3.0×48 | ø3.2×54 | ø3.4×54 | ø4.0×52 | ø4.0×60 | ø4.5×64 | ø4.9×70 | ø5.24×72 |
| Burning Temperature (°C) | 1350/1250 | 1350/1250 | 1350/1250 | 1350 | 1350 | 1350 | 1350 | 1350 | 1350 | 1350 | |
| Blocking-wheel Mode | Hydraulic or Mechanical | Hydraulic | |||||||||
| Cooler | Vertical Cooler | ||||||||||
| Fuel | Coal, Coal Gas, Natural Gas, Diesel Oil, Heavy Oil | ||||||||||
| Heat Consumption (KJ/KgCaO) | 5300/5000 | 5300/5000 | 5300/5000 | 5200 | 5200 | 5100 | 5100 | 4810 | 4810 | 4810 | |
Features of Daswell Lime Plant Conversion
- Rich experience and professional knowledge. Daswell has professional team to present innovative solutions for lime calcining plant upgrade so to improve profitability and reduce costs.
- Efficient vertical preheater. Daswell vertical preheater can reduce reduce energy consumption and intensify the rotary lime kiln utilization by preheat the limestone with exhaust hot air from the kiln.
- Quality vertical cooler. Daswell vertical cooler can cool down the quicklime for further handling and preheat the secondary combustion air for the rotary lime kiln.
- Advanced firing system. Daswell firing system for lime plant with rotary kiln can burn down fuels efficiently.
