From water pipes to power generation boilers for biomass, Yoshimine boilers respond to requests for customization.

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H-Type: Large sized biomass firing boilers

HIGH EFFICIENCY BIOMASS AND SEVERAL FUELS FIRING BOILER FOR POWER GENERATION

Since the establishment of Yoshimine, H-Type is utilized for many customers such like Plywood Company and Sugar Company, and recently it is utilized for power generation as a large sized high efficiency biomass fuel firing boiler. H-type also can use other solid fuel such as Coal, liquid fuel such as Heavy oil and Light oil, gas fuel such as LNG, LPG and City gas and etc. in addition to biomass fuels.

FEATURES OF PRODUCTS
VARIETY OF BOILER FUEL
CONSTRUCTION

FEATURES OF PRODUCTS

･A NUMBER OF ACHIEVEMENTS: The boiler gives the customer a technical security through a number of our achievement.

･THE MOST EFFICIENT WATER CIRCULATION SYSTEM: Yoshimine ’ s water circulation system ensures the greatest possible hat absorption. Water from the upper drum moves downward (blue lines) and collects in the lower drum and headers before moving up (red lines) and generating a mixture of water and steam. The high heat absorption that results improves the boiler ’ s efficiency for greater overall economy.

･THE MOST EFFICIENT GAS CIRCULATION: Yoshimine employs a unique steam separator in the upper drum to ensure that the steam is exceptionally dry and high in quality. The water and steam mixture is sent under a baffle which changes the mixture's direction before it reaches the upper drum. This removes water droplets from the steam. A steam separator then dries the steam, producing an extremely dry and high-quality steam which in turn improves the boiler's overall efficiency and economy.

･THE DRIEST HIGHEST QUALITY STEAM: Complete combustion in the large combustion chamber produces heat which radiates and is absorbed by the water walls. Gas passing through the slug screen changes direction three times before passing through the preheater. Ash and cinder are separated from the gas and deposited in special "pockets" as the gas passes. This prevents ash and cinder from accumulating in the tubes and maintains the best possible thermal efficiency even when the boiler is used continuously for many hours.

･EXCELLENT CORRESPONDENCE TO BOILER LOAD CHANGE: Compared with other makers ’ boiler, this H-type boiler is more excellent in load correspondence.

･MOST POLLUTION CONTROL PROBLEMS HAVE BEEN SOLVED: Automatic fuel feeding and pneumatic control can facilitate combustion control, which can also stabilize a burning condition and pollution problems have been largely solved in regulation.

･CONTINUOUS OPERATION IS POSSIBLE: Continuous operation is so possible that there is no need of ash discharging job, fire bed cleaning and rearrangement.

･STOKER SYSTEM: These stoker system are capable of an easy future alternation of fuel from fuel A to fuel B and vice versa through partial improvement of fuel supply system.

VARIETY OF BOILER FUEL

BAGASSE

Bagasse is the fibrous residue remaining after sugarcane or sorghum stalks are crushed to extract their juice.

Operation way	Optimum evaporation	Combustion system
Ash discharge by hand	6 to 60 T/H
Semi continuous ash discharge	6 to 200 T/H
Automatic continuous ash discharge	40 T/H over

WOODCHIPS

Woodchips are a solid fuel made from woody biomass. According to the different chemical and mechanical properties of the masses, the wood logs are mostly peeled and the bark chips and the woodchips processed in different processes.

Operation & Kind of fuel	Optimum evaporation	Combustion system
Log wood fuel	6 to 30 T/H
Chip wood fuel Semi continuous ash discharge	6 to 80 T/H
Chip wood fuel Automatic continuous ash discharge	30 T/H over
Bark fuel	6 to 30 T/H
Wood refuse and bark fuel	6 to 15 T/H

RICE HUSKS

Rice husks are the hard protecting coverings of grains of rice.

Operation & Kind of fuel	Optimum evaporation	Combustion system
Small amount Semi continuous ash discharge	6 to 30 T/H
Large amount Automatic continuous ash discharge	30 T/H over

COAL

Coal, a fossil fuel, is the largest source of energy for the generation of electricity worldwide.

Operation & Kind of fuel	Optimum evaporation	Combustion system
Small & medium amount of Low pressure	5 to 30 T/H
Large amount Automatic continuous ash discharge	30 T/H over

OIL PALM FIBER AND SHELL

Palm fiber and shell is the fibrous residue remaining after palm fruit bunches are crushed to extract their juice (oil).

Operation & Kind of fuel	Optimum evaporation	Combustion system
Ash discharge by hand	5 to 40 T/H
Semi continuous ash discharge	5 to 30 T/H

LIQUID FUEL AND GAS FUEL

At the request of customers, it is feasible to use a variety of Liquid fuel (heavy oil, light oil, waste oil etc.), Gaseous fuel (LNG, LPG, City gas, H2 Gas, Biogas, Waste gas from a Plant etc.) fuel with mono or dual-fuel burning system.

OTHERS

For fuels not listed above, we will chose the appropriate combustion system.

CONSTRUCTION

PNEUMATIC SPREADER AND TRAVELING GRATE

APPLIED FUEL :
BAGGASE, WOODCHIPS
RICE HUSK, COAL

According to the kind of fuel to be burnt, Mechanical spreader system is installed Dumping grate may drop an output when cleaning the grate. Employing the travelling stoker can make the boiler fully automatic. Air jetting is given inside the chamber to promote unburnt gas mixture and to help combustion As it is operated so that the fuel spread to as far as the deep area of the stoker returns the boiler front, the stoker is called “Backward stoker”. Ash is continuously discharged without any clinker problem The arch consisting of water tube and refractories is designed changing the size sticking up from the stoker’s top and its shape.

PNEUMATIC SPREADER AND DUMPING GRATE

APPLIED FUEL :
BAGGASE, WOODCHIPS

Manually cleaning the drums of large-types of boiler is impossible. Dumping grate method is employed as fire grate. Fuel is spread across the whole grate by installing air blow-in mouth under the lower chute of fuel continuous feeding slot.

PLATE STOKER AND FIXED GRATE

APPLIED FUEL :
WOODCHIPS

In addition to wood chip, indefinite shapes of wood can be used as fuel. The picture shows rotary feeder is equipped for continuous feeding, but chain feeder is also available.

INCLINED PINHOLE GRATE

APPLIED FUEL :
RICEHUSK, WOODCHIPS

Small and medium type, energy-saving type. Fuel burns while running down on the pinhole grate and continues burning on the dumping grate.

WATER COOLED TUBULAR GRATE

APPLIED FUEL :
WOODCHIPS

Combustion gas flows down to repress dust generation. Fuel is fed without disturbing the firing layer and combustion gas pass down through the firing layer repressing the dust generation.

COAL FIRING GRATE

APPLIED FUEL :
COAL

Travelling stoker moves to the rear side of boiler. Fuel is gently fed onto the stoker from the front of boiler. Dust generates less than Spreader stoker method.

PNEUMATIC SPREADER AND SHAKING GRATE

APPLIED FUEL :
OIL PALM FIBER AND SHELL

FIXED GRATE

APPLIED FUEL :
BAGGASE

H-Type: Large sized biomass firing boilers
HAS-Type: Small sized biomass firing package boilers