rotary dryer fuel consumption

rotary drum drying machine

Product IntroductionProduct introductionRotary dryer is one of the traditional drying equipments. It has reliable operation, large operation flexibility, strong adaptability and large processing capacity. It is widely used in metallurgy, building materials, chemical industry

Rotary dryer is one of the traditional drying equipments. It has reliable operation, large operation flexibility, strong adaptability and large processing capacity. It is widely used in metallurgy, building materials, chemical industry, coal washing, fertilizer, ore, sand, clay, kaolin, sugar, etc. Field, diameter: 1000-4000, the length is determined according to the drying requirements. In the center of the tumble dryer, the breaking mechanism can be avoided, and the wet material entering the drying cylinder is repeatedly picked up and thrown by the copy board on the wall of the rotating cylinder, and is broken into fine particles by thedispersing device during the falling process. The specific area is greatly increased, and it is in full contact with the hot air and dried.

4.The dryer has the characteristics of high temperature resistance and can quickly dry materials with high temperature hot air. The scalability is strong and the design takes into account the production margin.

The rotary dryer is mainly composed of a rotating body, a lifting plate, a transmission device, a supporting device and a sealing ring. The dried wet material is sent to the hopper by a belt conveyor or a bucket elevator, and then fed through the hopper through the feeding pipe into the feed end. The slope of the feeding pipe is greater than the natural inclination of the material so that the material flows smoothly into the dryer. The dryer cylinder is a rotating cylinder that is slightly inclined to the horizontal. The material is added from the higher end, the heat carrier enters from the lower end, and is in countercurrent contact with the material, and the heat carrier and the material are simultaneously flowed into the cylinder. As the rotating material of the cylinder is moved by gravity to the lower end. During the forward movement of the wet material in the cylinder body, the heat supply of the heat carrier is directly or indirectly obtained, so that the wet material is dried, and then sent out at the discharge end through a belt conveyor or a screw conveyor.

rotary dryer. drum drying equipment, tumble dryer

1. The dryer is of strong overload capacity resistance, large process load, low fuel consumption, and low cost. 2. It adopts direct flow drying method. The gas fume and the material go to the dryer from the same side. By using the hyper thermal gas fume, the evaporation strength is very high. With the low outlet temperature, the heat efficiency is very high. 3. The operating parameter can be changed according to different materials. So that the material can form a stable fabric curtain and achieve fully heat exchange. 4. The new type feeding and discharging device solve the problem of feeding jam, discontinuous and uneven feeding, and returning charge which lighten the load of dedusting system. 5. The new inner structure strengthens the cleaning and heat conduction of the dispersed material, and eliminates the bonding in the inner drum wall. The adaptability to the material moisture and stickiness is stronger.

maximizing rotary dryer performance with process audits

The performance of a rotary dryer is vital to maximizing process efficiency and capacity in any industrial process setting. While a well-designed dryer will yield few problems of its own, various factors can cause the performance of the overall drying operation to degrade.

A process audit is a thorough inspection and analysis of rotary dryer operation. Unlike an equipment audit, which focuses on the mechanical and structural components of a rotary dryer, a process audit focuses on a dryers overall performance. Both the dryer and exhaust system are typically examined.

The most common reason for conducting a dryer process audit is to check and potentially improve fuel efficiency. An audit allows a process engineer to gather all the data and systematically determine how dryer efficiency could be improved.

It is often desirable to improve capacity without purchasing a new dryer. A dryer process audit will identify issues that are keeping the dryer from reaching its potential. With a dryer capacity increase, fuel efficiency will also often improve.

Flight/Lifter design is key to efficient dryer operation. The wrong type of lifter can result in build-up problems and poor showering. Often the design of the lifter changes along the length of the dryer because the material properties change.

In addition to the reasons listed above, process audits can also serve as a valuable opportunity to gather benchmark data. When conducted regularly, the analysis of benchmark data over time can reveal more subtle indications of a potential problem.

The most common reason a drying operation is experiencing issues is because of ambient air leakage. Air in-leakage can reduce the gas temperature at the dryer feed end, resulting in reduced capacity and higher fuel consumption. Leakage at the discharge end adds extra volume to the gas handling system.

Flight, or material lifter design has a significant impact on the end product and overall dryer performance. Flights must be designed around the characteristics of the feed material in order to yield optimal performance and results. If feed or process conditions change, flight design and pattern may need to be re-evaluated. If wet or sticky feed is consistently building up in the feed end of the dryer, for example, this may indicate that the lifter design is not appropriate for the feed.

Lifters are also the key to achieving higher dryer efficiency; by using the correct lifter design, including shape and size, the showering of material in the dryer can be improved, leading to better gas-to-solids contact and improved drying.

FEECO process audits begin with the Customer Service Engineer discussing the issues and goals of the process audit with the plants engineers and ideally, operators. Operators are typically most familiar with the process and material, making them a valuable resource in an audit. This initial discussion often provides a direction for the process audit, or gives the Customer Service Engineer an idea of where it might be best to start.

The Customer Service Engineer also requests all available operating data to be gathered for review. If a problem is not immediately visible, the engineer will begin by conducting a number of tests and measurements on the operational unit.

The Customer Service Engineer utilizes the data gathered during testing to systematically assess where an issue is originating. This starts by performing a heat & mass balance and checking the dryer operation against what is expected. Upon a thorough analysis, the Customer Service Engineer will provide a comprehensive audit report consisting of the data collected, a summary of the work that was carried out, and most importantly, recommendations to optimize the process or resolve any issues.

Making operational or equipment modifications identified by the Customer Service Engineer will help improve process performance. As a result, the following benefits may be observed (depending on the scenario):

Drying in an industrial process setting is integral to achieving the required product quality. A drying operation that is not running as designed can cause a variety of issues, and may originate from any number of sources. For this reason, rotary dryer process audits are an effective tool to improve process operation.

The FEECO Customer Service Team is highly experienced in dryer performance and can efficiently assess any drying operation for optimization and issue resolution. In addition to dryers, process and equipment audits are also available for rotary coolers, as well as agglomeration operations.