JPH0219040Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is used to sterilize granules by heating to remove germs contained in various food powders such as onion powder used as raw materials for soup. The present invention relates to a heating device for use.

[Conventional technology and its problems]

Onions are used as raw materials for cooking soup.
In order to eliminate the expense and labor associated with cooking and processing vegetables after they are transported as vegetables, food manufacturers have recently started processing them into powder and supplying it to the market as a seasoning ingredient for cooking. However, when onions are processed into powder as a vegetable, soil bacteria contained in the onion cell bodies are not killed during the powder processing and remain in a fairly large amount in the powder. When onions are used as raw vegetables, they are cooked quickly to avoid spoilage, so the amount of bacteria originally contained in onions is small and does not have a harmful effect on the human body. When powdered vegetables are stored for a longer period of time than raw vegetables, bacteria remaining in the powder may propagate, which is undesirable from a food hygiene perspective.

To solve this problem, conventional methods have been used to sterilize powdered onion powder by heating it before shipping. Because it uses an open flame method that heats the container directly, if the heat is too strong, the powder at the bottom of the container will burn and the upper part cannot be sterilized adequately, and if the heat is too weak, the entire product cannot be sterilized properly. Thus, there was a problem in that it was difficult to effectively utilize the heating energy during roasting.

[Means for solving problems]

This invention uses roasting heat energy using a burner to solve the above-mentioned problems in removing bacteria contained in food powders, especially powders processed from raw vegetables such as onions. A heating device that does not directly irradiate the container containing the powder, but instead irradiates the storage container with concentrated hot air that stores heat, giving a uniform sterilization effect to the powder in the container. This is what we are trying to provide.

The heating device according to the present invention has a furnace chamber whose outer periphery is surrounded by a wall, into which hot air is supplied via a burner, and a powder and granular material at one end outside the furnace chamber in the upper part of the furnace chamber. A cylindrical powder roasting body is rotatably hung horizontally through the upper side walls of the furnace chamber to transport hot air from the furnace chamber to the other end while roasting. It consists of a heating chamber that is partitioned into the furnace chamber via a partition wall in order to supply concentrated air to the lower surface of the roasting barrel, and the heating chamber sucks hot air from the burner into the lower part of the interior through a duct. The heating chamber has an air blower for sucking air upwardly inside the heating chamber, and the upper end of the heating chamber is an inclined surface having a retention portion having a chevron-shaped cross section along the length direction of the roasting drum. It is characterized by having a long groove-shaped hot air outlet in which the lower surface of the part is arranged.

[Effect]

In the heating device according to this invention, the inside of the furnace chamber is heated by the burner, but there is a heating chamber inside the furnace chamber that is partitioned from the inside through a partition wall, and there is a blower in the lower part of this heating chamber. Most of the high temperature air heated by the burner in the furnace chamber is introduced into the heating chamber via this blower.

The hot air introduced into the heating chamber intensively heats the lower surface of the powder roasting drum located directly above the outlet through the outlet provided on the inclined surface at the upper end of the heating chamber. The roasting barrel is rotatably supported with both ends penetrated by both side walls of the furnace chamber, and when powder is introduced from one end outside the furnace chamber while being rotated,
A screw on the inner peripheral surface heats and roasts the powder while sequentially transferring it to the other end.

When the hot air is blown upward in the heating chamber by the blower, the hot air heats the lower surface of the roasting barrel from the outlet in a pressurized state. At that time, part of the hot air directly heats the roasting body through the outlet, and since this outlet is provided in the middle of the slope at the top of the heating chamber, it hits the slopes on both sides of the outlet. The other part of the hot air is guided toward the outlet along each inclined surface, and all the hot air blown up is blown out from the outlet in a concentrated manner to efficiently heat the lower surface of the roasting drum.

The hot air blown out from the outlet is not a direct flame from a burner, but it is concentratedly irradiated onto the roasting body with pressure from the outlet, so the temperature inside the body and the heat are high enough not to burn the powder. This effectively sterilizes contaminating bacteria without causing any qualitative change in the powder.

〔Example〕

Next, the configuration of the heating device for sterilization according to the present invention will be explained with reference to an embodiment shown in the drawings.
FIG. 2 is a front view showing the internal configuration of the furnace chamber 1.
shows a cross-sectional view of. The outer periphery of the furnace chamber 1 is surrounded by a wall surface 2, and both ends 4a and 4b of the furnace chamber 1 are loosely inserted and penetrated through holes 3 made in both side walls 2a of the furnace chamber.
A cylindrical roasting body 4 of granular material that protrudes outside the furnace chamber 1 is rotatably suspended horizontally. The rotary shaft 5 in the center of this roasting body 4 has a drive part 6 outside the furnace chamber 1.
The onion powder 7 introduced from the open end 4a is transferred to the other end 4b by a screw 8 provided on the inner peripheral surface.
is transported in the direction of.

A burner 9 is provided in the middle part of one side wall 2a of the furnace chamber 1 near the front side, and the burner 9 moves into the furnace chamber with air supplied from an intake port 10 provided at the mounting part of the burner 9. Heat the inside of 1.

Further, a heating chamber 11 for heating the lower surface of the cylindrical powder roasting body 4 is provided in the rear part of the furnace chamber 1, avoiding the mounting position of the burner 9. . This heating chamber 11
The entire lower part of the inside of the furnace chamber 1 along the entire length of the roasting body 4 is formed like a room that can be independently partitioned from the inside of the furnace chamber 1 by a partition wall 12. This bulkhead 1
At the upper end of the heating chamber 11 according to 2, a roof-shaped inclined surface 13 having a retention section 14 having a chevron-shaped cross section is provided along the lower surface of the roasting barrel 4. A long groove-shaped hot air outlet 15 is provided at which the bottom surface of the baking drum 4 is located.

Further, in the lower central part of the front surface of the partition wall 12 forming the heating chamber 11, there is a duct 16 for introducing hot air from the burner 9 in the furnace chamber 1 into the heating chamber 11.
A blower 17 is provided at the rear end of the duct 16. Therefore, the hot air in the furnace chamber 1 generated by the burner 9 is forcibly drawn into the blower 17 through the duct 16 by the blower 17, and then sent upward into the heating chamber 11.

A portion of the hot air pushed out under a predetermined pressure by the blower 17 directly heats the circumferential surface of the roasting drum 4 through the outlet 15 at the upper end of the heating chamber 11 , and the other portion directly heats the circumferential surface of the roasting drum 4 . After flowing along, it is ejected from the outlet 15 and flows into the furnace chamber 1 through a small gap provided between both side edges of the outlet 15 and the roasting body 4.

It is preferable that folded pieces 18 directed inward are provided on both side edges of the air outlet 15, respectively.
By providing these folded pieces 18, the inclined surface 1
3, the hot air that flows along the sides of the outlet 15 does not wastefully flow out from the gap between the outlet 15 and the roasting body 4, and instead flows toward the center of the outlet 15 as shown by the arrow. Since the hot air flows out from the outlet 15 in a changed direction, the thermal efficiency of the hot air blown out from the outlet 15 can be increased.

Further, since the air outlet 15 is provided at the middle of the inclined surface 13 at the upper end of the heating chamber 11, the hot air that hits the inclined surfaces 13 on both sides of the air outlet 15 flows along the respective inclined surfaces 13 to the air outlet 15. be guided in the direction of In this case, the upper inclined surface 13 of the outlet 15
The hit hot air temporarily stays in the upper retention part 14 and then is guided toward the outlet 15 by the pressure of the hot air blown up from below, and the slope 13 on the lower side of the outlet 15 It flows intensively toward the outlet 15 together with the hot air that hits it.

Onion powder 7 fed into one end of the roasting body 4
As the body 4 rotates, it constantly rolls while being transferred toward the other end of the body via the screw 8 on the inner circumferential surface, and the upper layer and the lower layer are exchanged, and the air is concentrated from the outlet 15. It is roasted by heating with hot air.

The hot air blown out from the outlet 15 stays in the upper part of the furnace chamber 1 while heating the outer periphery of the roasting body 4, and the whole roasting body 4 is surrounded by a hot air atmosphere. It is discharged to the outside of the furnace chamber 1 through the gap between the through holes 3 of the roasting body 4 provided on both side walls 2a of the roasting body 1.

Further, both ends 4a and 4b of the roasting body 4 are open, and moisture released by roasting the onion powder 7 in the body 4 is released from both ends 4a and 4b of the body. It is released to the outside and accelerates the drying of the powder.

Note that the amount of hot air blown out from the outlet 15 of the heating chamber 11 varies depending on the amount of onion powder 7 being transferred inside the roasting barrel 4, but when 80 kg of powder is transferred per hour, the amount of hot air is approximately The temperature is preferably about 97°C at 90°C and 100 kg, and the overall temperature is preferably in the range of about 80 to 110°C.

〔effect〕

In the heating device according to the present invention, as described above, the heating temperature by the burner in the furnace chamber is not applied directly to the roasting drum, but after the hot air is once sucked into the heating chamber divided into the furnace chamber through the blower. Since the pressure of this blower causes the hot air to act intensively on the lower part of the roasting body, an effective roasting temperature can be applied to the powder inside the body. In addition, since the air outlet at the upper end of the heating chamber is provided on an inclined surface with a retention part having a chevron-shaped cross section, all the hot air that has risen to the top of the heating chamber can be introduced into the air outlet without wasting the heat source. can be used efficiently. As a result, the water content in the powder, which was initially about 7 to 14%, can be reduced to about 3 to 4% in a short time without burning, and appropriate sterilization can be performed effectively and efficiently.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the furnace chamber showing the internal structure of the heating device according to the present invention, and Fig. 2 is the same as Fig. 1.
FIG. 1: Furnace chamber, 2: Wall surface, 3: Hole, 4: Roasting body,
5: rotating shaft, 6: driving section, 7: powder, 8: screw, 9: burner, 10: intake port, 11: heating chamber, 12: partition wall, 13: inclined surface, 14: retention section,
15: hot air outlet, 16: duct, 17: blower.

Claims (1)

[Scope of utility model registration request] A furnace chamber whose outer periphery is surrounded by a wall is supplied with hot air through an indoor burner, and in the upper part of this furnace chamber, the powder and granules are transferred from one end of the furnace chamber to the other end while being roasted. A cylindrical powder and granular material roasting body is rotatably suspended horizontally through upper side walls of the furnace chamber, and a furnace is provided to centrally supply hot air in the furnace chamber to the lower surface of the roasting body. It consists of a heating chamber partitioned into the room through a partition wall, and the heating chamber has a blower in the lower part of the interior for sucking hot air from the burner through a duct and sucks it up in the interior. The upper end is a sloped surface having a retention part with a chevron-shaped cross section along the length direction of the roasting drum, and a long groove-shaped hot air outlet is opened on this slope where the lower surface of the roasting drum is arranged. A heating device for sterilizing powder and granular materials.