JPS6319689Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses hot air obtained by burning rice husks, sawdust, and other granular and flaky fuels (referred to as rice husks, etc.) to accelerate the fermentation of compost, etc., incinerate livestock manure, etc.
This article relates to a combustion furnace intended to be used as a heat source for drying agricultural products, etc.

Conventionally, it has been difficult to completely burn the rice husks and the like in a simple combustion furnace without producing smoke and without including fine dust in the combustion gas. Special Publication No. 49-27616 is known as a rice husk combustion furnace with a simple structure, but due to the thickness of the accumulated fuel layer inside the furnace, the temperature of the combustion air supplied is not constant, and smoke is often produced due to incomplete combustion. Furthermore, when the lid at the bottom of the furnace body is opened to take out the ash, some of the ash gets mixed into the hot air.

The present invention utilizes a fixed amount of primary combustion air from the perforated pipe of the fuel supply regulator at the upper part of the lower hearth of the furnace body.
The secondary combustion air from the perforated pipe in the hearth and the air intake port eliminates incomplete combustion and prevents the generation of smoke. Because the road is curved, dust is removed, and this dust falls into the ash tray at the bottom, and neither smoke nor dust is discharged from the suction exhaust fan.

Note that if the catalyst is housed in a box with a wire mesh bottom in the combustion gas suction air path, even if incomplete combustion gas is generated, it will come into contact with the catalyst and complete combustion will result in no smoke. Even if ash is contained in the gas and is inhaled, it is removed by the filtering action of the wire mesh and catalyst.

Furthermore, if a heat exchange device such as a cylindrical pipe is installed in the box-shaped suction air path and fresh air is passed through it,
It provides heated air that is completely free of smoke and ash, and can be used for drying and heating materials that require high quality products.

Next, the operation of this invention will be explained based on the drawings.

Reference numeral 1 denotes a furnace body, which is open at the top and filled with fuel such as rice husks. Reference numeral 2 denotes a fuel supply adjustment device, which is composed of a steel pipe 3 with many holes 4 drilled in it, and a lug 5 and a handle 6 connecting these are attached to the end, and by moving this handle 6 back and forth, The upper fuel is dropped into the hearth 7. The fuel burns on the hearth 7, while the holes 4 in the fuel supply regulator 2
Primary combustion air is supplied through the holes 4 in the hearth 7, and secondary combustion air is supplied through the holes 4 in the hearth 7. Combustion gas is sucked from the hearth by a suction device 13 and discharged as indicated by the arrow, but outside air is mixed in through temperature adjustment ports 9 and 10 to adjust the temperature of the combustion gas passing through the suction device 13.

Gas temperature is controlled by mixing outside air with lid 8 and cylinder 1.
1 to change the opening areas of the temperature adjustment ports 8 and 10 as appropriate. Reference numeral 14 indicates a partition wall that bends the flow of combustion gas in the direction of an arrow, and causes ash dust in the gas to fall into the ash receiver 12. The ash receiver 12 is configured in a drawer shape, and the partition wall 1
A partition wall is also provided in the ash receiver 12 at the lower part of the ash container 4 to prevent combustion gas from short-circuiting to the suction device 13.

Reference numeral 15 designates the upper plate of the suction air passage, which is removable, and a box body 18 containing the catalyst is placed in the suction air passage 17, as shown in the figure.

If the configuration is as described above, first, flammable paper is lit and dropped into the hearth 7 to ignite it, fuel such as rice husks is poured into the opening, and the fuel supply adjustment device 3 is operated by the handle 6. It is moved and swung and falls onto the hearth 7 to be burned. On the other hand, if combustion air is sucked through the hole 4 by the suction device 13, the fuel on the hearth 7 is continuously combusted, and the combustion gas is sucked by the suction device 13. When the combustion progresses and ash is formed on the hearth 7, move the handle of the hearth 7 to drop the ash at the bottom into the ash receiver 12, and at the same time move the handle of the fuel supply adjustment device 3 to drop the ash on the top of the hearth 7. is supplied to the hearth 7 to continue combustion. To adjust the temperature of the combustion gas suctioned and discharged by the suction device 13, the lid 8 and cylinder 11 are moved to increase or decrease the amount of outside air mixed in.

Ash dust in the combustion gas falls and accumulates in the ash receiver 12, but this can be done by pulling out the ash receiver 12 and throwing it away at the appropriate time, and by replenishing the fuel 16 and moving the fuel supply adjustment device 2 and the handle 6 of the hearth 7 in a timely manner. , heated air free of smoke and ash can be continuously taken out from the suction device 13.

It goes without saying that by arranging the box body 18 containing the catalyst in the suction air path, complete combustion gas and heated air free of ash can be taken out from the suction device 13 more reliably.

Fig. 2 shows a modified embodiment of the present invention in which a heat exchange device is attached to a box-shaped suction air passage, where 19 is a pipe for heat exchange, and 20 is a fresh air intake opening opening downward. The hood 21 is a duct for taking in and taking out fresh air heated by heat exchange, and is a duct connected to a heated fresh air suction fan (not shown). By doing so,
A heat exchange pipe 1 is installed in the suction air passage 17 which also serves as dust removal.
9, which has an extremely compact structure and has the advantage of providing completely dust-free and smoke-free heated air.

Note that by insulating the inner surface of the furnace body 1 with a cable or the like, the release of radiant heat can be prevented and combustion heat can be effectively utilized.

In addition, by closing one end of the pipe 3 that sends the primary combustion air and secondary combustion air and pumping the air from the other end, the amount can be changed freely.
2 can be formed into a V-shape and an auger can be arranged at the bottom of the V-shape to automate ash removal. Furthermore, the temperature of the combustion gas sucked into the suction device 13 is sensed,
It is also possible to automatically operate the handle 6, automatically adjust the opening degrees of the temperature control ports 9 and 10, and install a device that detects a decrease in fuel 16 and automatically replenishes it.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention: Fig. 1 is an overall side view, Fig. 2 is a front view thereof, Fig. 3 is a perspective view of the fuel supply adjustment device portion, and Fig. 4 is a modified implementation of the invention. An overall side view of the example, and FIG. 5 is a front view thereof. 1...Furnace body, 2...Fuel supply adjustment device, 3...
Fuel supply control device and hearth pipe, 7... Hearth, 8... Lid, 9... Temperature control port, 10... Temperature control port, 11... Cylinder, 12... Ash receiver, 13... Suction Apparatus, 14... Partition wall, 18... Box housing catalyst, 19... Pipes for heat exchange, 20... Fresh air intake hood, 21... Duct.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A furnace with a rotatable hearth of perforated pipes in the lower part of the furnace body with an opening at the top and a fuel inlet, and one or more rows of furnaces in the upper part of the hearth. A fuel supply adjustment device with rotatable perforated pipes similar to the floor is installed, and each is swung to remove ash and supply fuel, and the perforated pipe of the fuel supply adjustment device directs primary combustion air to the furnace body. The fuel flows from the top to the bottom, and the perforated pipe in the hearth supplies secondary combustion air and cools the hearth. An ash removal device is installed at the bottom of the hearth. The space communicates with a box-shaped suction air path of a combustion gas suction device, and this box-shaped suction air path is provided with a dust removal partition and a suction combustion gas temperature control port for a combustion device for burning rice husks, etc. (2) The box-shaped suction air passage of the combustion gas suction device is characterized in that the bottom thereof is formed of a wire mesh or the like, and a catalyst is housed inside the box-shaped suction air passage, as set forth in claim 1 of the utility model registration claim. Combustion equipment for rice husks, etc. (3) The apparatus for burning rice husks, etc. as set forth in claim 1 of the utility model registration claim, wherein the box-shaped suction air passage of the combustion gas suction apparatus is equipped with a heat exchange device.