HZG rotary kiln drying equipment

NegotiableUpdate on 02/05

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The internal structure design of the rotary kiln drying equipment is reasonable and can fully utilize thermal energy. For example, after years of improvement, the rotary drum dryer is equipped with a special structure inside, which allows materials to stay in the dryer for a longer time. At the same time, some rotary kiln drying equipment can also achieve multi-stage waste heat utilization with high thermal efficiency. For example, the waste heat utilization of rotary kiln drying equipment can reach 60%, and the use of four stage waste heat recovery technology can increase the thermal efficiency to 75%.

Product Details

Rotary kiln drying equipmentOverview

Rotary kiln drying equipment is a large continuous drying device, whose main body is usually a slightly inclined and rotatable cylindrical body. Wet materials are added from the feeder and move from the higher end to the lower end under the action of gravity. They exchange heat with hot air or hot walls inside the cylinder to complete drying.

There are various types of rotary kiln drying equipment, such as electric heating and conduction high-temperature rotary kiln drying equipment that converts electrical energy into thermal energy and heats materials through thermal conduction; The steam tube rotary kiln drying equipment has been professionally optimized and designed.

Structural diagram:

HZG回转窑干燥设备

Technical Specifications:

model	Direct heating downstream type	Direct heating downstream type	Direct heating counter current type	Direct heating counter current type	Composite heating	Composite heating
Material Type	ore	HP foaming agent	blast furnace slag	ammonium sulfate	phosphate fertilizer	coal
Processing capacity (kg/h)	1000	466	15000	20000	12000	5000
Water content (%)	30	13	6	1.5	5	6.5
Final moisture content (%)	15	0.3	1	0.1	0.1	0.1
Average particle size (mm)	6.5	0.05	4.7	0.5-1.7	0.5	5
Material stacking density (kg/m ³)	770	800	1890	1100	1500	750
Hot air volume (kg/h)	3900	5400	10750	9800	6500	16000
Inlet gas temperature (℃)	600	165	500	180	650	570
Material outlet temperature (℃)		42	100	70	80	75
Heating method	gas	Steam electric heating	heavy oil	coal-fired hot blast stove	heavy oil	heavy oil
Loading coefficient		6.3	7	7.5	7.8	18
Rotational speed (rpm)	4	4	3.5	3	4	2
inclination	0.04	0.005	0.03	0.05	0.05	0.043
Number of copied boards	12	24	12	22	Outer side of inner cylinder 8 Inner cylinder outer 16	6 12
Drier diameter (m)	2.0	1.5	2	2.3	Outer tube 2 Inner cylinder 0.84	Outer tube 2.4 Inner cylinder 0.95
Drying machine length (m)	20	12	17	15	10	16
Drive power (kw)	22	7.5	15	11	11	15

1、 Characteristics of rotary kiln drying equipment

1. High drying efficiency

In the rotary kiln drying equipment, the material continuously rolls inside the cylinder, with a large contact area with hot air, allowing for sufficient heat exchange. The electric heating conduction high-temperature rotary kiln drying equipment adopts a rotary cylinder structure, and the materials continuously roll inside the kiln, ensuring that each part can be uniformly heated and improving the drying efficiency.

2. Strong targeting

Different types of rotary kiln drying equipment can be designed for specific materials.

3. High degree of automation

Many rotary kiln drying equipment are equipped with good control systems, such as electric heating conduction high-temperature rotary kiln drying equipment equipped with PLC or DCS automation control equipment, which can achieve automated operation and monitoring, reduce manual operation costs and labor intensity.

4. High thermal energy utilization efficiency

The internal structure design of the equipment is reasonable and can fully utilize thermal energy. For example, after years of improvement, the rotary drum dryer is equipped with a special structure inside, which allows materials to stay in the dryer for a longer time. At the same time, some rotary kiln drying equipment can also achieve multi-stage waste heat utilization with high thermal efficiency. For example, the waste heat utilization of rotary kiln drying equipment can reach 60%, and the use of four stage waste heat recovery technology can increase the thermal efficiency to 75%.

5. Easy to operate and maintain

The operation of equipment is usually simple and convenient, easy to maintain and upkeep. Taking the electric heating conduction high-temperature rotary kiln drying equipment as an example, its structural design makes its maintenance cost relatively low.

6. Strong processing capability

Rotary kiln drying equipment is suitable for drying large quantities of granular and block materials, with a processing capacity of generally 50-500t/d. Compared with traditional drying methods, it has significant advantages in large-scale production.

7. Wide adaptability of materials

Traditional drying methods may have significant limitations on the form of materials, while rotary kiln drying equipment has strong adaptability to materials, and can handle granular, block shaped, and cake shaped materials.

8. Good heat source compatibility

The selection of heat sources for rotary kiln drying equipment is diverse, including combustible waste gas, coal, gas, fuel oil, etc., which can be flexibly configured according to different needs and actual situations.

2、 Application Fields

1. Metallurgical industry

Rotary kiln drying equipment also plays an important role in the metallurgical industry. Used for heat treatment and smelting of materials such as steel and non-ferrous metals; Iron ore pellets can undergo a combined operation of drying, preheating, and roasting; For non-ferrous metal concentrates, rotary kiln drying equipment lined with corrosion-resistant titanium materials can also be used.

2. Building materials industry

The building materials industry is one of the important application areas of rotary kiln drying equipment. It can be used for sintering and drying building materials such as cement and lime, such as slag drying, which can reduce the moisture content from 15% to 1% and be used as a cement raw material.

3. Environmental protection field

In the field of environmental protection, rotary kiln drying equipment can be used for waste treatment and resource utilization. For example, for sludge incineration, a rotary kiln drying equipment with a combination design of drying section and incineration section can be used; For hazardous waste treatment, equipment made of corrosion-resistant alloy steel materials can be selected.

4. New materials industry

The electric heating conductive high-temperature rotary kiln drying equipment can be used for the preparation and treatment of new materials such as lithium-ion battery materials and rare earth materials.

Development prospects of rotary kiln drying equipment

With the continuous development of industry and the increasing demand for environmental protection, rotary kiln drying equipment is also constantly innovating and improving. In terms of energy conservation, oxygen rich combustion technology can save 15-20% of energy, and four stage waste heat recovery technology can improve thermal efficiency. These energy-saving technologies will make rotary kiln drying equipment more efficient in energy utilization. In terms of intelligence, the application of intelligent control systems such as kiln skin monitoring system based on infrared thermal imaging will improve the automation level and operational stability of equipment.