New Biomass Boiler Combusts Bamboo, Reduces Clinker

2020/01/31 14:41
Sousuke Kudou, technical writer
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The E-NE Series in a container (source: Tess Engineering)
The burner (source: Tess Engineering)

Tess Engineering Co Ltd (Osaka City) announced Jan 27, 2020, that it will release a biomass-powered water boiler capable of using bamboo chips as fuel in late January 2020.

The boiler, "E-NE Series," is a non-pressure-type warm water generator and was jointly developed by Tess Engineering, Tomoe Shokai Co Ltd (Chiyoda-ku, Tokyo) and MIS Co Ltd (Fukuoka City).

The E-NE Series reduces the amount of clinker generated at the time of combustion by using its own rotatory gasification swirl combustion burner. Also, even when clinker is generated, it is promptly removed by an automatic discharge function, making it possible to stably combust bamboo chips.

Clinker is a lump formed by combusting bamboo containing a large amount of potassium and melting ash. It hinders combustion, potentially damaging the inside of the furnace.

With a technology to control combustion, Tess Engineering reduced the time it takes to start supplying warm water. By automating the removal of ash and employing an automatic furnace tube-cleaning device, the E-NE Series keeps high-efficiency combustion, according to the company. It can also combust powdery and solid fuels including unused biomass other than bamboo and wood chips.

A fuel silo, screw conveyor, burner and boiler were packaged and housed in a container. As a result, the E-NE Series reduces on-site construction work as much as possible and can be installed in a short period of time.

Using a non-pressure-type can body, the boiler eliminates the need to send a notification or have a legal inspection based on the Ordinance on Safety of Boilers and Pressure Vessels or obtain qualifications or licenses for handling it.

The price of the main unit of the E-NE Series is ¥40,000,000 (excluding tax and installation cost). Tess Engineering aims to sell 10 units of the boiler per year. The company plans to exhibit the product at the 5th Int'l Biomass Expo, which will take place from Feb 26 to 28, 2020, at Tokyo Big Sight.

Currently, the number of "neglected bamboo forests" is increasing as the demand for bamboo is decreasing. And "bamboo damage" is becoming more and more serious across Japan. Bamboos prevent other kinds of plants from growing, disrupting forest ecosystem and causing landslides in the case of heavy rain because they are not deeply rooted.

While bamboo forests require appropriate maintenance including regular logging, there have been many challenges in effectively using bamboo as biomass fuel such as clinker generation.