JP2008082567A - Fan forced heater for wood chip (woody pellet)-burning greenhouse - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a greenhouse farmer with a fan forced heater with the technology for developing an environment-friendly small-scale incinerator, as the greenhouse cultivation farmer needs alternative fuel for petroleum as recently the price of petroleum is escalating. <P>SOLUTION: The chip of proper amount is supplied from a wood chip storage tank 1 to a combustion furnace 3 by a supply screw conveyor 2, and fired up and ignited by an ignition burner, and then the ignition burner is stopped and the chip burns by itself. Hot air of combustion temperature of 800-900°C or more flows into a heat exchanger 4, and is distributed into the greenhouse to heat the greenhouse. An ejector fan is attached to a cyclone dust collector 5 to collect fly ash by cyclone by induction so that the fly ash is not scattered to the atmospheric air. The temperature of the air discharged from a chimney, is about 100°C. Harmful gas and dioxine are hardly generated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention develops and manufactures a pollution-free small-scale incinerator when conventional greenhouse farmers have been using oil burners and have been severely impacted by the rise in oil prices, and developed this technology for greenhouse heating. did.

Traditionally, greenhouse farmers have used oil burners and have been hit hard by farming operations due to soaring oil prices. Therefore, the incinerator previously filed in JP-A-2005-24222 has been improved.
JP 2005-24222 A

  By using woody biomass fuel rather than petroleum fuel, fuel cost reduction and exhaust gas CO2 reduction will be solved.

  The present invention provides means for providing a greenhouse farmer as a greenhouse heating device using a pollution-free incinerator as a heat source due to the rising oil price. Refractory material castable inside the combustion furnace 1600 ° C fireproof, dry type, so that the heat storage in the furnace is good and the amount of ventilation necessary for combustion is good, so wood chips (wood pellets) are well combusted and combustion temperature is 800 ° C to 900 ° C, high temperature combustion The heat exchanger receives the heat of combustion and dissipates heat into the greenhouse to heat the greenhouse. A cyclone dust collector is installed in the chimney to prevent fly ash, and an ejector and fan are installed in the cyclone exhaust to smooth the flow of hot air from the combustion furnace through the heat exchanger and improve the thermal efficiency of the heat exchanger.

A heat exchanger is installed between the combustion part and the flue gas part of the incinerator, and the heat exchanger receives heat and dissipates this heat as warm air in the greenhouse to heat the greenhouse. Safety measures were taken to automatically close the fuel supply shunt with a damper during a power failure.

  The present invention considers that the cost reduction of greenhouse farmers is most effective. Because the inside of the combustion furnace is refractory material castable 1600 ° C refractory and dry, the heat storage in the furnace is good and the amount of ventilation required for combustion is good, so wood chips (wood pellets) are well combusted and the combustion temperature is 800 ° C to 900 ° C, high temperature combustion The heat exchanger receives the heat of combustion and dissipates it into the greenhouse to heat the greenhouse. A cyclone dust collector is installed in the chimney to prevent fly ash, and an ejector and fan are installed in the cyclone exhaust to smooth the flow of hot air from the combustion furnace through the heat exchanger and improve the thermal efficiency of the heat exchanger.

When an appropriate amount of chips is supplied from the wood chip storage tank (1) to the supply screw and from the conveyor (2) to the combustion furnace (3) and the chips are ignited by an ignition burner, the ignition burner stops and self-combusts in the combustion furnace (4 ) Hot air with a combustion temperature of 800 ° C to 900 ° C or higher flows into the heat exchanger and blows the hot air into the greenhouse to heat the greenhouse. (5) Attach an ejector fan to the cyclone dust collector and fly by cyclone. It collects ash and does not emit fly ash to the atmosphere.

  In the agricultural field, since heating in greenhouses is indispensable as long as pesticide-free cultivation is used, I think that heating devices have great use.

The front view of the warm air heater for the wood chip (wood pellet) 焚 greenhouse of this invention. The top view of the warm air heater for the wood chip (wood pellet) 焚 greenhouse of this invention. The left view of the warm air heating machine for the wood chip (wood pellet) 焚 greenhouse of this invention.

Explanation of symbols

1 Woody biomass fuel storage tank.
2 Screws and conveyors to be supplied from the storage tank to the combustion furnace receiving shout.
3 Combustion furnace body 4 Heat exchanger body 5 Cyclone dust collector

Claims (6)

Wood chip (wood pellets) fired burning furnace, fire-resistant castable is used in the furnace, and wood chips (wood pellets) are burned in the furnace at 800 ° C to 900 ° C or higher. .   The bottom part of the wood chip (wood pellet) storage tank has a 45-degree gradient structure, a screw is placed on the V-shaped part of the bottom part, and an appropriate amount is discharged in the discharge direction with a conveyor. The wood chip (wood pellet) firewood hot air heater according to claim 1, which does not clog or bridge.   Supplying wood chips (wood pellets) to the combustion furnace, adjusting the supply amount at intervals of timers and switches based on the temperature sensing of the thermocouples, conveyors, and furnaces, and starting and stopping the screws and conveyors A warm air heater for a wood chip (wood pellet) 焚 greenhouse according to claim 1.   When an emergency damper is installed in the combustion furnace supply shout, and if there is a power outage during combustion inside the furnace, it is predicted that a flame will rise in the supply shout, the emergency damper automatically closes to prevent a fire, and when electricity is restored The warm air heater for a wood chip (wood pellet) -greenhouse according to claim 1, wherein the emergency damper is manually restored and restarted by an initial operation.   2. The wood chip (wood pellet) -greenhouse warm air heater according to claim 1, wherein the heat exchanger receives the combustion heat of a wood chip (wood pellet) furnace at 800 ° C. to 900 ° C. and dissipates it into the greenhouse.   A cyclone dust collector is installed in the chimney to prevent fly ash, and the flow of hot air passing through the heat exchanger from the combustion furnace is smoothed by an ejector and a fan in the cyclone exhaust to improve the heat efficiency of the heat exchanger. Wood chip (wood pellets) as described above Hot-air heaters for greenhouses.

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