The first Waste-To-Energy facility dedicated for infectious waste in Japan

(Industrial Waste Close-up 2006.10)

PLANTEC Inc.

Outline of PLANTEC Inc.

Foundation : 1967
Location of Head Quarters : 1-6-17 Kyomachi bori Nishi-ku, Osaka 550-0003
URL : http://www.plantec-kk.co.jp

Business category

  • Engineering of environmental equipment
  • Designing/manufacturing/delivery of a new incinerator
  • Combustion improvement, retrofit and modifications of an existing incinerator

Delivery record

  • 138 facilities, 246 incinerators
  • Non-industrial waste:108 facilities, 211 incinerators
  • Industrial waste:30 facilities, 35 incinerators.

Infectious waste incinerator delivered to Tokyo Waterfront Recycle Power Co., Ltd.

Tokyo Waterfront Recycle Power Co., Ltd., (Photo 1), an affiliated company of Tokyo Electric Power Company, has started operation of thermal recycle facilities for industrial and infectious wastes in August, 2006. An electronic manifest system has been adopted in the project to effectively monitor waste movement.

A facility view of Tokyo Waterfront Recycle Power Co., Ltd .
Photo 1. A facility view of Tokyo Waterfront Recycle Power Co., Ltd .

PLANTEC was assigned to incineration system and heat recovery system (exhaust heat boiler) based on the achievements of its own incineration technology (vertical stoker type incinerator). The facility is the first Waste-to-Energy facility dedicated for infectious waste having treatment capacity of 100 tons per day (50 tons/24 hours x 2 lines) (Figure 1).

Schematic of the Infectious waste incinerator delivered to Tokyo Waterfront Recycle Power Co., Ltd.
Figure 1. Schematic of the Infectious waste incinerator delivered to Tokyo Waterfront Recycle Power Co., Ltd.

Outline of the vertical incinerator

・History of the development

In the vertical incinerator, drying, main combusting and post-combusting zones of a conventional stoker type incinerator are configured vertically, and combustion air is supplied from the bottom, wherein changing combustion conditions can effectively be controlled (Figure 2).

Outline of the Vertical incinerator (vertical stoker type)
Figure 2. Outline of the Vertical incinerator (vertical stoker type)

As for the combustion of medical waste, conventionally it is known to be difficult to operate stably for a long time due to plastics and glasses mixed in the waste. Based on an idea that a vertically configured incinerator could be effective for such purpose, PLANTEC has been devoted to its technology development and improvement since the delivery of the first plant for Kyoto University Faculty of Medicine Hospital.

・Features of the incinerator

Features of the incinerator are as follows:

1.Economic efficiency

It has a simple vertical cylindrical structure so that it makes it possible to cut construction and maintenance costs. Furthermore, it is economically efficient because it has high thermal efficiency that leads to cut fossil fuel consumption.

2.Reduced environment impact

It is capable of controlling unstable combustion due to its high thermal efficiency. Accordingly, the emission of carbon monoxide and dioxins stays at sufficiently low level and the discharge rate of exhaust gas is quite stable, and dust content is low. Thus, the function of heat recovery system is performed effectively (Figure 3).

Measurement example of inside-of-furnace temperature and CO concentration
Figure 3. Measurement example of inside-of-furnace temperature and CO concentration

3.Stable and easy operation

It enables to have stable combustion for a longer time due to its high thermal efficiency and to have good operability due to its lesser drive parts.

Award-winning

  • ・Director-General of the Science and Technology Agency Award of year 2000
  • ・New technology division awards, WASTEC Awards of year 2000