Medical waste rotary kiln

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Medical waste rotary kiln

Rotary kiln incinerator for Medical Waste

Hourly output: 100 ~ 1000kg/h

Daily output: 3~30t/d

Fuel: coal, heavy oil, or natural gas

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We are a rotary kilns manufacturer integrating research and development, production, sales and general engineering contracting. Our rotary kiln covers the fields of hazardous waste incinerators, organic waste gas incinerators, organic waste liquid incinerators, waste heat comprehensive recovery and utilization, and electrical automation engineering, etc.

Medical waste rotary kiln incinerator is a mature technology, if the waste to be treated contains a variety of difficult to burn substances, or the moisture range of the waste is large, rotary kiln is the ideal choice. Because of the change of rotary kiln speed, the residence time of garbage in the kiln can be affected, and the strong mechanical collision of garbage in high-temperature air and excessive oxygen can be obtained, and the slag with very low content of combustible substances and spoilage substances can be obtained. A hazardous waste incineration rotary kiln can process waste, especially in the field of industrial waste incineration applications. The application in raw waste incineration is mainly to improve the burning-out rate of slag, and completely burn the waste to meet the quality requirements of slag reuse.

Hospital waste features

  1. calorific value of about 7000kJ/kg;
  2. the packing density is about 300 ~ 500kg/m3, and the packing density is 400kg/m3 in the design calculation;
  3. water content 40% ~ 50%, ash 10%, PH 8 ~ 9.

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analytics of medical waste

  1. Hospital waste contains Escherichia coli, Salmonella, pseudomonas aeruginosa, dysentery bacillus, hepatitis B, and other harmful bacteria and viruses, the total number of bacteria is large and is a kind of harmful solid waste. To destroy and remove harmful bacteria and viruses, it is appropriate to use a high-temperature incineration treatment.
  2. In recent years, some incinerators suitable for the treatment of hazardous solid waste have been developed in China, among which, the rotary kiln incinerator has the advantages of simple structure, low cost, reliable operation, easy control, stable combustion, and can be built into large, medium and small rotary kiln incinerators. It is suitable for central waste incineration in urban hospitals, self-provided incinerators in large hospitals, and self-provided incinerators in small and medium-sized hospitals.
  3. Centralized incineration can use equipment with a high degree of automation and a high level of pollution control, and can recover heat energy, but the investment and operating costs are relatively expensive, and the municipal government needs to fund the construction and maintenance of operation, which is suitable for economically developed cities with high environmental quality requirements.
  4. The decentralized treatment of self-provided incinerators can reduce the pressure of transportation, the investment and operating costs are low, and it is easy to be accepted by users, but whether it can meet the requirements of incineration is a concern.

working principle of medical waste Rotary Kiln incinerator

Our company based on the characteristics of medical waste, combined with mature rotary kiln incineration technology, and designed this medical waste treatment system. The basic process flow is: the whole incineration system is divided into two combustion chambers to achieve graded combustion. The kiln body of the primary combustion chamber can be rotated to transport waste and strengthen the mixing of heat and mass in the kiln, the rotational speed is about 0.5 ~ 1.0rpm, the residence time of the waste is about 0.5 ~ 1.5h, and the combustion temperature is guaranteed to be above 850℃. The feeding speed is controlled so that the volume of waste in the kiln accounts for 20% of the total volume. An appropriate amount of natural gas or diesel can be used as auxiliary fuel in the primary combustion chamber, and industrial combustible waste liquid can also be mixed. In the primary combustion chamber, reactions such as volatiles precipitation, cracking, partial combustion of combustible gas, burning of residual carbon and embers occur. The combustible gas generated from the primary combustion chamber enters the secondary combustion chamber, and a small amount of auxiliary fuel is injected into the secondary combustion chamber to maintain the combustion temperature of about 1100℃ in the furnace, and the residence time of the flue gas is sufficient (≧2 seconds); This can ensure the rapid and perfect reaction of combustible gas, and ensure the thermal reduction rate and destruction rate of waste. After the flue gas is removed from the secondary combustion chamber, it is discharged to the standard by the tail gas treatment system.

Technical parameter of medical waste rotary kiln incinerator

Inner diameter of cylinderφ2.9m
Cylinder length29m
SlopeSin3°
Number of supports2
Speed0.4-4.0r/min
MotorModelPowerSpeed
YSNP315M2-690kW100-1000r/min
ReducerModelSpeed
YNS790-35.535.5
Weight132t (excluding refractory)
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