This machine is a continuous penetrating flow drying equipment applied for drying pieces strip and particles state materials with good ventilation. The machine is suitable for the materials such as dewatering vegetable, herbal medicine of traditional Chinese medicine and others, for which the water contents are high and high drying temperature is not allowed. The machine owns the advantages, of fast drying speed, high evaporation capacity and good product quality.The dewatered & filtered cake state paste material should be made into particles or strips before drying process.
According to the transportation distance and different modes of transportation, choose the nude, fixed packaging or hardcover to reduce the transportation cost and increase the customer experience, so as to better complete the transportation delivery.
Kenki is a sludge dryer based on the unique design of self-cleaning double screw conveyors that guarantees the effective process of moving the feedstock. The dryer is specially designed for continuous drying of pasty and sticky materials.
Kenki dryer bases on the unique design of self-cleaning double screw conveyors that guarantees the effective process of moving the feedstock. The dryer is specially designed for continuous drying of pasty and sticky materials.
Our sludge dryer is based on synchronized twin screw conveyors which are carrying the material through the dryers chamber and preventing sticking of the material to the hot surfaces of the dryer. Special design of blades that are turning in the intersection with each other enables to dry and agitate the material. Adjacent blades are scraping off the material that deposits on the primary blades. Solid waste is crushed and dried simultaneously inside the dryer.
No matter how sticky, adhesive and viscous the material is, Kenki can dry it without clogging inside of the dryer and with a stable, continuous operation. The special dual-screw constriction guarantees no operational trouble during the drying process.
Sludge after dehydration process of wastewater treatment is often affected by flocculants and forms large lumps, and it frequently happens that only surface is dried but inside are not when sludge is discharged as large lumps.
In the drying process of Kenki, the materials are moved forward into the dryers main body smoothly by being heated and crashed with a feeder at the inlet. The materials get smaller and smaller since they are continuously sheared and agitated during conveying and heating. As the material gets more divided, heat reaches inside more smoothly and surely, and quality of outputs becomes stable.
Kenki has a very simple construction and its initial cost is estimated to be repaid with the cost of industrial waste disposal for about 2 -3 years. Also, as the heat source of drying is only saturated steam, a mechanism based on combined use of conductive heat transfer method and heated air method helps to achieve a high quality of safety and hygiene, and running cost can be kept low by using surplus steam within your facility. Machine operation is conducted in continuous mode easily and there is no need for supplementary operators and labor. Since the quantity of replacement parts is small, maintenance is easy and its costs are reduced.
Because of low-temperature drying, the composition of the dried material is not affected and organic sludges after drying can become added value as fuel, fertilizer and many more. Because the low-temperature drying does not use flame, the temperature of the dryers outer surface is low and the dryer is safe and hygienic. Fresh air from outside is kept off when maintaining the temperature inside the dryer. Amount of moisture in the exhaust air discharging water is small, and the discharged water can be returned to wastewater treatment facilities.
KENKI Corporation has been established in January 1964 in Fukuoka, Japan, as a company specialised in developing, design and manufacturing of maintenance and industrial equipment. Since more than 50 years company specialises in development of industrial sludge dryers, feeding and sorting equipment as well as other environmental protection machines used in Japan and worldwide. During the time, Kenki has expanded its specialisation in the unique twin screw drying technologies, developing several generations of sludge dryers for sticky and pastry materials. Today, the core focus of the company is development and providing the newest generation continuous drying equipment Kenki SHTS.
Heat and mass transfer model for drying is coupled with a sludge flow model in a paddle dryer.This new model leads to steady-state simulation of sludge water content and temperature profiles.Simulations and experimental data are in fair agreement for different operating conditions.Drying temperature and sludge residence time are the most influent parameters for final water content.Stirring speed has much less influence than other operating parameters in the range studied.
Sewage sludge can be dried in paddle dryers and turned into an interesting material for energetic valorization. This costly operation generally relies on manufacturer's know how and is not very flexible. Setting up a descriptive model of such dryers could lead to a better energy integration of this technology and make sludge drying more competitive by adjusting the operating conditions in order to reach the desired water content depending on subsequent applications. This paper presents the development of such a model adapted to a continuous pilot-scale sludge paddle dryer. The model combines sewage sludge flow description by means of a homogeneous Markov chain and drying kinetics thanks to the penetration theory, leading to the simulation of water content and temperature profiles along the dryer during steady-state operation. The principle of coupling these models is presented and the approach is validated against experimental data in various operating conditions. A parametric study emphasizes the crucial role of wall temperature and sludge residence time on the final water content, while stirring speed or sludge initial water content are less influent.
Sludge flow in a double-axis continuous dryer can be predicted by a new flow model.A new recirculation parameter is introduced inspired by former research.According to the model, results of experiments and that of simulation agree well.Parameters, recirculation parameters and solid hold-up are critical to the model.
A two-dimensional model based on the theory of Markov chain has been developed to determine the Residence Time Distribution (RTD) of municipal sewage sludge in a double-axis continuous paddle dryer. Based on the experiments, the paper proposes further corrections to simulate the transition. To characterize the sludge transition in the dryer, the parameter of internal recirculation based on one dimensional model is further developed. In addition, two parameters, the internal forward coefficient between two axes and the internal forward coefficient in one axis are introduced to characterize the new model. In absence of available correlation, solid hold-up of each cell in dryer and both the recirculation parameters are identified by fitting the model to experiments. Through analysis, the model demonstrates its ability to describe the sludge flow in a double-axis continuous paddle dryer by the experimental and simulation RTD curve. Finally, an analysis of influence factors highlights that recirculation coefficients are critical for the model while solid hold-up Hu of each cell controls the mean residence time and the final moisture content. In addition, the geometric residence time of sludge flow has a negligible effect on sludge flow for it has no effect on dimensionless variance. Moreover, compared with the recirculation coefficient between different axes R, the recirculation coefficient in one axis r has a negligible effect. In addition, recirculation parameters have no effect on mean residence time of sludge flow.