JPS6218951Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a low-temperature drying device that performs drying at a low temperature.

As shown in Fig. 1, this type of conventional apparatus has a combustion furnace b installed in a drying chamber a, and heats the combustion furnace b with a burner c installed outside the room.
The material to be dried (not shown) is dried by heating to a low temperature of ~30 DEG C., and the combustion gas is discharged outdoors through an exhaust pipe d connected to a combustion furnace b.

However, in the above device, only the radiant heat and conductive heat from the combustion furnace b contribute to the drying of the material to be dried, and the combustion gas having a considerable amount of thermal energy is directly discharged outdoors from the exhaust pipe d. However, because the heat source has already been used for a long time, it has poor thermal efficiency and is uneconomical.

Therefore, the purpose of this invention is to improve thermal efficiency by lowering the temperature of combustion gas using a specially configured exhaust stack and releasing it into the drying chamber, without exhausting the combustion gas outdoors. be.

In detail below, referring to FIG. 2 showing an embodiment of the present invention, a drying chamber 1 in which the material to be dried can be freely attached and detached.
As in the conventional example, a combustion furnace 2 is installed horizontally inside the combustion chamber, and a burner 3 placed outside is connected to the base end of the combustion furnace 2.

In the present invention, the combustion furnace 2 is connected to a first exhaust pipe 5 having a desired number of fins 4, 4, etc. attached to its outer periphery. The central portion 5' is bent into a U-shape, and the base end thereof is connected to the top end side of the combustion furnace 2, and the fins 4 are attached to the central portion 5' at predetermined intervals. ing.

Further, the tip 5'' of the first exhaust pipe 5 opens into a second exhaust pipe 6 provided in the drying chamber 1, and the second exhaust pipe 6 has a direction from the inlet 7 to the outlet 8. A blower 9 is provided to blow air.
In the illustrated example, an L-shaped second exhaust pipe 6 is installed horizontally in the upper part of the drying chamber 1 with its outlet 8 curved downward.
The tip 5'' is located at the center of the horizontal portion 6' of the exhaust pipe 6,
The second exhaust pipe 6 has an inlet 7 opened at the upper part of the base end of the horizontal part 6', and an outlet 8 opened at the lower end of the vertical part 6''. 10 and a motor 11 is provided at the proximal end side of the horizontal portion 6', and is connected to the inlet 7.
It is configured so that air can be blown from the outlet 8 toward the outlet 8.

In the illustrated example, ventilation fans 1 for outdoor exhaust are installed in openings 12', 12'... provided on the upper side wall 1' of the drying chamber 1.
2, 12... are installed.

However, in order to dry the material to be dried using the lever device, it is sufficient to ignite the burner 3 to generate a flame and to operate the blower 9, and the flame is injected into the combustion furnace 2 to blow the flame. While being heated, the combustion gas is drawn by the air blowing from the blower 9 and introduced into the first exhaust pipe 5, and the combustion gas is
While flowing through the same exhaust pipe 5 to which the fins 4, 4... are attached, heat is released and the temperature decreases.
Inside the exhaust pipe 6, the inlet 7 is opened by the blower 9.
The combustion gas is mixed with the air in the drying chamber 1 taken in from the drying chamber 1, and the combustion gas becomes warm air with a further temperature drop, and is discharged into the drying chamber 1 from the outlet 8 of the second exhaust stack 6. The material to be dried in the drying chamber 1 is dried by the wind and the heat released from the combustion furnace 2.

As explained above, in the present invention, a combustion furnace 2 equipped with a burner 3 is provided in a drying chamber 1 in which the material to be dried can be freely loaded and removed, and a desired number of fins are provided on the outer periphery of the combustion furnace 2. 4, 4... are connected, and the tip portion 5'' of the first exhaust pipe 5 is connected.
opens into a second exhaust pipe 6 provided in the drying chamber 1, and the second exhaust pipe 6 has an inlet 7.
Since a blower 9 is provided that blows air from the furnace toward the outlet 8, not only can the combustion furnace 2 heat the room as in the past, but also the high-temperature combustion gas can be transferred to the Since heat is released while flowing through the first exhaust stack 5, the room can be heated by the released heat, and the combustion gas whose temperature has decreased is transferred to the blower in the second exhaust stack 6. 9, the air is mixed with the air in the drying chamber 1 taken in from the inlet 7, and becomes warm air whose temperature has further decreased.
Therefore, since it is discharged into the same chamber 1 from the outlet 8 and used for low-temperature drying of the material to be dried, thermal efficiency can be dramatically improved, and the temperature inside the drying chamber 1 is maintained at a uniform temperature by the air blown by the blower 9. Therefore, the object to be dried can also be dried uniformly.

Further, since the tip 5'' of the first exhaust pipe 5 opens into the second exhaust pipe 6 equipped with the blower 9, the combustion gas in the first exhaust pipe 5 is drawn by the air blown by the blower 9. Since the internal pressure of the combustion furnace 2 decreases, the combustion efficiency of the burner 3 can also be increased, and the first exhaust pipe 5 can be lengthened to improve thermal efficiency. 3 backfire can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal front explanatory view showing a conventional drying device, and FIG. 2 is a longitudinal front explanatory view showing an embodiment of the drying device according to the present invention. 1... Drying chamber, 2... Combustion furnace, 3... Burner, 4... Fin, 5... First exhaust stack, 5''...
Tip of first exhaust pipe, 6...Second exhaust pipe, 7...
Inlet, 8... Outlet, 9... Blower.

Claims (1)

[Scope of utility model registration request] A combustion furnace equipped with a burner is provided in the drying chamber in which the material to be dried can be freely installed and removed, and a first exhaust pipe having a desired number of fins on the outer periphery is connected to the combustion furnace. A low-temperature drying device in which the tip of one exhaust pipe opens into a second exhaust pipe provided in a drying chamber, and the second exhaust pipe is provided with a blower that blows air from its inlet to its outlet.