JPS61195240A - Hot air generator for agriculture - Google Patents

Abstract

PURPOSE:To increase greatly heat transfer area and contrive fuel saving by piercing many air passage tubes through a return smoke passage which forms an S-shaped fire furnace in order to make air passage tubes to be brought to contact with the combustion gas flowing through the smoke passage. CONSTITUTION:A fuel is jetted out of the burner 2 of a firing opening and it burns in a combustion chamber 3. Its combustion gas enters a return smoke passage 4 and flows in S-shape and flows out of a stack 7. When air is blown downwards from a blower 9 into a fire furnace cover 8, part of the air from the blower 9 flows through many air passage tubes 13 provided in the return smoke passage 4 to the upper face of the combustion chamber 3 and joins to the hot air flowing downwards on the outer side of the return smoke passage 4 to reach the hot air discharge opening 11, and from there it is sent to a dryer, etc. With this arrangement the heat transfer area is increased markedly to raise heat exchange efficiency, making a large fuel saving possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for generating hot air for hot air drying of various products in farmers.

Traditionally, agricultural hot air generators with an S-shaped furnace body installed inside the cover were mainly those shown in Japanese Utility Model Publication No. 5-7-943, A furnace with an S-shaped side surface that connects a vertically elongated combustion chamber 3 with a burner 2 attached to the l, and a plurality of flues 47 that turn back one town forward from the rear end of this combustion chamber 3 and then turn back again. A is housed in a furnace cover 1o, a blower 13 is entirely attached to the upper part of the furnace cover 10, and an air outlet 17 is provided in the lower part.

Points to be Solved by the Invention The hot air generator described above has a furnace A formed into an S-shape by a combustion chamber 3 and a folded flue 4, and a flue flowing around the inside of the furnace A, and a furnace cover 1o. This device is designed to effectively exchange heat with the air flowing upward and downward inside the flue, but in this case, the molten gas flows only on the surface of the flue 4. Since the heat exchange only takes place with the air, the heat transfer area is small and sufficient heat exchange is possible.
, Therefore, when /,j generates Ron's burner, the temperature of the exhaust reaches 300~1100℃, and a lot of heat energy is generated. There was a problem that - was being dissipated in vain.

The present invention was made in order to solve the above-mentioned conventional problems, and a ventilation pipe is installed through the folded flue in an S-shaped furnace, and by expanding the heat transfer area with the ventilation pipe, heat exchange is performed. The purpose of the present invention is to provide a hot air generator for agricultural use that greatly improves air efficiency.

Means for Solving the Problems The present invention, as shown in the embodiments of FIGS.
This combustion chamber 3 is a vertically elongated combustion chamber 3 equipped with a combustion port l at the front.
From the rear end - is a furnace A with an S-shaped side surface that connects a wide and flat wedding ring '4 that is folded forward and then folded back again. A furnace cover 8 is provided with an air outlet 10 and a hot air outlet 11 is provided at the bottom.
The present invention relates to an agricultural hot air generator having a configuration in which the folded flue 4 described above is provided with a large number of vent pipes 13 extending downward from the direction E.

Function: In the device configured as described above, when a burner for 2 minutes is attached to the combustion port 1 of the combustion chamber 3 and the fuel is combusted by this, the combustion gas generated in the combustion chamber 3 is transferred to the combustion chamber 3.
It enters the folded flue 4 from the rear end, flows forward through the folded part toward the front, moves from the rear end to the folded part towards the rear, flows backward through this part, and is discharged into the chimney 7. In this state, the air blower 9 is operated to send air from above to below into the furnace casing 8, a portion of the air flows toward the upper surface of the combustion chamber 3 through a large number of ventilation pipes 13 provided in the folded flue 4, When it hits the top surface of the combustion chamber 3, it splits into both sides, merges with the air that has flowed down the outside of the folded flue 4, flows outside the combustion chamber 3, reaches the hot air outlet [1], and is sent from here to the dryer. In this device, as mentioned above, a large number of ventilation pipes 13 are installed through the folded flue 4, and air is passed between these ventilation pipes 13 as shown in FIGS. 4 and S. Since the combustion gas flows in a threaded manner, and the heat transfer area is increased by the surface area of the vent pipe 13 compared to a conventional folded flue, the exhaust gas is The temperature is reduced to 720°C, and the heat recovered by this amount is reduced to 720°C. − is increased.

Embodiments The present invention will be described in detail below based on embodiments shown in the drawings.

In Figures 1 to 3 of the drawings, A is a furnace, which is formed vertically and has a combustion port 1 at its front end, a vertically long combustion chamber 3 with a burner 2 attached to the combustion chamber 1, and a combustion chamber 3 from the rear end of this combustion chamber 3. forward-
is connected to a wide and flat flue 4 which is folded back and then folded back again using a connecting pipe 5.6, forming an S-shaped side surface. A chimney 7 is connected to the end.

8 is a furnace cover with a heat insulating structure, which encloses the above-mentioned furnace A;
An air outlet 10 for blowing air by a blower 9 is provided at the upper part, hot air outlets 11 and 11 are provided at both sides of the lower part, and dampers 12 and 1 are provided at these outlets 11 and 11, respectively.
2 is provided, and these dampers 12° 12 open the outlet tl.
, 11 and adjust the degree of opening.

Reference numeral 13 denotes a large number of ventilation pipes that penetrate the folded flue 4 from above to below, and are arranged in two rows in series along the flow direction of combustion gas as shown in Figure 4, or in series as shown in Figure 5. The heat transfer area to the combustion gas is expanded by arranging three rows in a staggered manner as shown in Figure 6, or by arranging several rows of smaller diameter ones in a staggered manner as shown in Figure 6. It is like that.

Reference numeral 14 denotes an opening/closing lid provided at the front end of the flue 4. It is normally left open and closed, but when the inside of the flue 4 becomes dirty, it can be removed through the cleaning window 15 provided in the furnace cover 8 to open the flue 4. Open one end and clean the inside.

Reference numeral 16 denotes the seat of the cleaning window 15, which is removed only when cleaning, and is attached at other times to keep the cleaning window 15 sealed.

Reference numeral 17 denotes a preliminary combustion port provided in the combustion chamber 3 above the combustion port 1, as shown in FIG. 1 when the burner 2 is used.

As shown in Fig. 3, the wood is closed by the hole 18
When using grass, etc. as fuel, the lid 1 as shown in Figure 7.
8 to fully open the preliminary fire port 1, and the fire port 1 is equipped with a lid 20''5- with a combustion air intake port L9 as shown in the figure.
Once installed, wood, grass, and solid matter from ponds can be used as fuel.

Effects of the Invention The device according to the present invention has a large number of vent pipes penetrating the folded flue forming the Sv3 furnace, and brings the combustion gas flowing in the flue into contact with these pipes. The heat transfer area is greatly increased compared to a shaped furnace.

Combustion gas flows through a number of vent pipes extending through the flue, increasing the contact effect and extending the flow path for sufficient heat exchange.

Therefore, according to this device, the exhaust gas temperature, which conventionally reached a high temperature of 300 to 4t00°C, can be lowered to 750 to 770°C, resulting in a waste of thermal energy. You can save a lot of fuel by eliminating it.

Not only can the burner burn heavy oil, etc., but it can also completely burn wood, grass, etc., making it highly efficient as a fuel.

It has the following unique effects.

[Brief explanation of drawings]

FIG. 1 shows an example of the implementation of the device according to the present invention:
And M-face M-th row μ's last new front M-brush? The figure is a vertical side view of the same. Figure 2 is a cross-sectional plan view of the folded flue in the same building. Fig. S and Fig. O--A cross-sectional plan view showing another embodiment of the folded flue. FIG. 7 is a partial front view showing another embodiment. In the figure, 1 is the firing port, 3 is the combustion chamber, 4 is the folded flue, A is the S-shaped furnace, 8 is the furnace chamber, 9 is the blower, 1o is the air outlet, and [1 is the outlet. -Koda Hayasa

Claims (1)

[Claims] This is a furnace with an S-shaped side profile, which connects a vertically long combustion chamber with a combustion opening at the front to a wide flat flue that turns forward from the rear end of the combustion chamber and then turns back again. A furnace cover that encloses the furnace and has an air blower opening in the upper part and a hot air outlet in the lower part, and a large number of ventilation pipes that penetrate the above-mentioned folded flue from the top to the bottom. An agricultural hot air generator featuring: