JPH0216085Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the method of dry distilling rice husks, sawdust, or crushed organic materials by sequentially feeding them into the inner cavity of the furnace and burning them, and then transferring the generated combustion gas from the primary combustion chamber into the combustion tube. The present invention relates to an improvement in a rice husk combustion device in which direct hot air or indirect hot air is taken out after complete combustion.

The above-mentioned rice husks combustion device is basically formed into a vertically long cylindrical shape, as shown in FIG. Rice husks H are charged from the input port a into the upper and lower intermediate portions of the inner cavity of the furnace body 1 provided.
A diagonal sink plate 2 is provided to guide the rice husks H to one side of the inner cavity of the furnace body 1, and the rice husks H... are directed from the lower end of the sink plate 2 to the other side of the inner cavity of the furnace body 1. By allowing the flow to flow in accordance with the angle of repose α and depositing on the upper surface of the rostre b, a primary combustion chamber W consisting of an empty chamber into which rice husks cannot flow is formed below this sink plate 2, and the rice husks are The combustion tube 3, which serves as a secondary combustion chamber, is connected to the primary combustion chamber W, which is an empty chamber into which no grains can flow. When the rice husks H... exposed in the primary combustion chamber W are deposited on the roaster b in a state forming the primary combustion chamber W, they are sucked in from the combustion tube 3 side while being burned from the surface side according to the angle of repose α. The luminous gas generated from the rice husks H which is heated and dry distilled in the lower layer side following the burning surface layer side is extracted by the fan F into the empty chamber W which becomes the primary combustion chamber. During combustion, complete combustion is carried out in the combustion tube 3, so that the burned combustion gas can be directly taken out as clean hot air containing no soot or incomplete combustion gas.

In the rice husks combustion device constructed in this way, when the combustion in the empty chamber W, which is the primary combustion chamber formed on the lower surface of the sink plate 2, becomes active, the sink plate 2 is heated to a high temperature. As a result, even the stored rice husks deposited on the top surface of the furnace body 1 are burned, resulting in incomplete combustion of the rice husks in the entire interior of the furnace body 1, and the problem of reducing the amount of combustion heat. There is a problem that the efficiency of generating hot air is insufficient.

The present invention was devised to solve this problem that has arisen with conventional means.
The furnace body 1 is designed to form a cavity W on the lower surface side, which serves as a primary combustion chamber into which the rice husks H to be thrown into the furnace do not flow.
Even if the temperature of the sink plate 2 shelved inside rises due to heating due to the combustion operation of combustion gas in the empty chamber W, which serves as the primary combustion chamber on the lower side, the sink plate 2 will accumulate on the upper side of the sink plate 2. Rice husk H stored in the furnace body 1
The object of the present invention is to provide a new means for efficiently extracting the generated hot air while preventing the combustion of the fuel from being heated to a high temperature and resulting in incomplete combustion.

In the present invention, as a means to achieve this objective, the rice husks are placed in the middle part of the inner cavity of the cylindrical furnace body, which has an input port for rice husks at the top and a rostle at the bottom. In a rice husks combustion device, a rice husks combustion apparatus is provided with a diagonal sink plate forming a primary combustion chamber consisting of a cavity into which rice grains do not flow, and a combustion tube is connected to the cavity below the sink plate. A partition wall is arranged in parallel on the lower surface of the plate, an air passage is formed between the partition wall and the sink plate, and an intake port that opens to the outer surface of the furnace body is installed at the upper end of the air passage. The side end side of the combustion chamber is connected to a cooling air passage installed in a jacket shape around the outer periphery of the furnace body, and the cooling air passage is connected to an air guide pipe that surrounds the combustion tube and faces the suction port of the suction fan. The present invention proposes a rice husk combustion device characterized by the following.

Next, an example of implementation will be described in detail with reference to the drawings. In addition,
The same reference numerals are used for the same components as those of the previous means.

FIG. 2 is a longitudinal side view of a rice husk combustion device in which the present invention can be implemented. In the figure, 1 is a furnace body, 2 is a sink plate provided in the furnace body 1, and W is the bottom side of the sink plate 2. 5 indicates a partition wall provided on the lower surface of the sink plate 2, and y indicates an air path formed between the partition wall 5 and the sink plate 2.

The furnace body 1 is formed into a vertically long rectangular cylinder shape,
A rice husk input port a whose opening and closing are controlled by a shutter 40 is installed in the upper part, and a roaster b which reciprocates in the direction of arrow A in FIG. 2 by a reciprocating mechanism 41 is installed at the bottom of the inner cavity. It is placed on a shelf. and,
A hopper 10 is formed below the rostle b to collect smoky charcoal of rice husks falling from the rostle b.

The sink plate 2 is provided at an intermediate position between the upper and lower sides of the inner cavity of the furnace body 1, and is installed diagonally so as to descend from the upper part of the front side (the right side in FIG. 2) of the inner cavity of the furnace body 1 toward the rear side of the furnace body 1. The lower end 20 of the lower end 20 becomes a free end at a position slightly toward the rear of the front and rear center of the inner cavity of the furnace body 1. A regulating plate 21 is provided vertically at the free end 20 of the lower end.

The partition wall 5 is arranged parallel to the sink plate 2 at a predetermined distance on the lower surface side of the sink plate 2, and forms an air path y between the partition wall 5 and the sink plate 2. . The upper end side of the air passage y is connected to a duct 50 provided on the upper surface side of the furnace body 1, and communicates with the outside of the furnace body 1 via an air intake port 51 provided in the duct 50.

In the primary combustion chamber W, the rice husks H introduced into the furnace body 1 through the input port a are regulated by the lower edge of the aforementioned regulation plate 21, as shown by the chain line in Fig. 2. According to the angle of repose α of the rice husks H..., the predetermined slope h is used as a free surface to flow below the bulkhead 5 installed on the lower surface of the sink plate 2, and deposit above the rostle b. The free surface of the rice husks H that forms the slope h, the partition wall 5 and the regulating plate 2
It is formed by a cavity surrounded by 1 and 3. The primary combustion chamber is constructed by forming a through hole in a machine wall 11 on the front side of the furnace body 1 and a heat insulating plate 12 provided as a lining on the inside thereof, and a combustion tube whose base end side is connected to the through hole. It is connected to 3.

Reference numeral 6 denotes a cooling air passage provided in the form of a jacket to surround the outer periphery of the furnace body 1, and as shown in FIG. , a portion 6 surrounding the left and right sides of the furnace body 1
As shown in FIG. 4, an outside air intake port 60 is opened on the rear side of a, 6a, and an air guide that surrounds the outside of the combustion tube 3 is provided in the area surrounding the front side of the furnace body 1. A line pipe 7 is connected thereto.

Portions 6a, 6a of the cooling air passage 6 surrounding the left and right sides of the furnace body 1 are communicated with the air passage y formed on the lower surface side of the sink plate 2 through communication ports 52. .

F is a suction fan for extracting combustion gas from the primary combustion chamber W in the inner cavity of the furnace body 1 into the combustion tube 3 for complete combustion and taking it out as hot air;
80 is equipped with an axial blower 81,
By connecting the base end of the wind barrel 80 to the tip opening 7a of the aforementioned wind guide pipe 7, which is also formed as a connecting pipe, combustion gas flows from the primary combustion chamber W side through the combustion pipe 3. At the same time, heated outside air used for cooling the furnace body 1 is sucked in from the cooling air passage 6 surrounding the four circumferences of the furnace body 1 to dilute the combustion gas and take it out as hot air at a predetermined temperature. It is set as. As this suction fan F sucks the air in the cooling air passage 6, the air is drawn into the air passage y formed on the lower surface side of the sink plate 2 through the intake port 51 on the upper end side thereof. A flow of outside air flows out from the communication ports 52 into the cooling air passage 6, and the outside air is sent together with the combustion gas to the suction fan F that extracts the combustion gas from the combustion tube 3 via the cooling air passage 6. It is designed to be incorporated into

In the illustrated embodiment, M is a drive motor that drives the axial blower 81, E is an ejector that conveys the burnt remains of rice husks, and 30... are combustion bodies made of ceramic that are arranged in parallel in the combustion tube 3. be.

The embodiment device constructed in this manner operates as follows.

If the shutter 40 is operated to open the input port a at the top of the furnace body 1 and the rice husks H are introduced from there, the rice husks H will be deposited inside the furnace body 1, and as a result, the furnace body A primary combustion chamber W consisting of an empty chamber into which the rice husks H do not flow is formed on the lower surface side of a sink plate 2 which is disposed diagonally on a shelf at an upper and lower intermediate part of the interior of the combustion chamber 1.

In this state, if the suction fan F is operated while burning the surface side of the rice husks H that forms the bottom of the primary combustion chamber W and is exposed in the primary combustion chamber W according to the rest α, the rice husks H forming the bottom surface of the primary combustion chamber W are burned. Volatile gas that is heated in the lower layer side following the surface layer side and generated by dry distillation is extracted into the primary combustion chamber W and begins to burn, starting the combustion operation.
In this state, the rice husks H at the bottom of the rice husk layer deposited in the furnace body 1 are activated by the operation of the rostle b.
However, by being discharged outside the machine, the rice husks accumulated in the furnace body 1 flow downward, and new rice husks H flow down one after another to the bottom of the primary combustion chamber W. The combustion operation will continue.

As a result, the temperature of the sink plate 2, which is the ceiling wall of the primary combustion chamber W, gradually rises as the air in the partition wall 5 provided on the lower surface side and the air passage y formed between them is heated. I'll come.

At this time, due to the suction operation of the suction fan F, a negative pressure is created in the air guide pipe 7 connected to the suction side of the suction fan F, and the cooling air passage 6 on the outer periphery of the furnace body 1 connected to the air guide pipe 7 and the The air in the air passage y in the ceiling of the connected primary combustion chamber W comes to be sucked into the suction fan F. For this reason, the air passage y provided on the lower surface side of the sink plate 2, which serves as the top plate of the primary combustion chamber W, is taken in from the air intake port 51 open to the outer surface of the furnace body 1, and is introduced into the cooling air passage 6 and the air guide. A flow of outside air is generated which is sucked into the suction fan F through the wind pipe 7, and this air flow suppresses a rise in temperature within the air path y. Then, the sink plate 2 is maintained at a temperature below the air path y.

Therefore, heating of the sink plate 2 due to the combustion operation in the primary combustion chamber W is effectively suppressed, and the increase in temperature of the sink plate 2 causes the furnace body 1 to accumulate on the upper surface thereof.
Incomplete combustion of the rice husks H inside is prevented, and at the same time, the cooling air that cools the sink plate 2 can be cooled and taken out as hot air.

As explained above, the rice husk combustion device according to the present invention has a cylindrical furnace body 1 having a rice husk inlet a at the top and a roaster b at the bottom. A slanted sink plate 2 is installed to form a primary combustion chamber W consisting of a cavity into which rice husks do not flow, and a combustion tube 3 is connected to the cavity W below the sink plate 2. In the combustion apparatus, a partition wall 5 is arranged in parallel on the lower surface of the sink plate 2, an air path y is formed between the partition wall 5 and the sink plate 2, and an air path y is formed on the upper end side of the air path y outside the furnace body 1. An intake port 51 that opens to the furnace body 1 is installed, and the side end side of the air path y is
The cooling air passage 6 is connected to a cooling air passage 6 installed in a jacket shape on the outer periphery of the combustion cylinder 3, and the cooling air passage 6 is connected to an air guide pipe 7 surrounding the combustion cylinder 3 and facing the suction port of the suction fan F. Therefore, there is a vacant chamber W which becomes the primary combustion chamber into which the rice husks H input into the furnace body 1 do not flow.
A sink plate 2, which is shelved in the furnace body 1 so as to form a cavity W on the lower surface side, serves as a primary combustion chamber on the lower surface side.
Even if the temperature rises due to the heating caused by the combustion operation of the combustion gas, the rice husks H accumulated in the furnace body 1 and accumulated on the upper surface side of the sink plate 2 are heated to a high temperature and become incomplete. This makes it possible to efficiently extract the generated hot air while preventing it from becoming combustible.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional rice husk combustion device.
FIG. 2 is a longitudinal sectional side view of the rice husk combustion device according to the present invention, FIG. 3 is a front view of the same device, FIG. 4 is a longitudinal sectional front view of the same device, and FIG. 5 is a cross-sectional plan view of the same device. Explanation of drawing symbols, E...Engineer, F...
...Suction fan, H...Rice crust, M...Motor,
a... Input port, b... Losttle, h... Inclined surface,
W...Primary combustion chamber (vacant chamber), y...Air passage, 1...
Furnace body, 10...Hopper, 11...Machine wall, 12...
...Insulation board, 2...Sinking board, 20...Descent end, 21
... Regulation plate, 3 ... Combustion cylinder, 30 ... Combustion body, 4
0... Shutter, 41... Reciprocating mechanism, 5...
Bulkhead, 50...Duct, 51...Intake, 52...
...Communication port, 6...Cooling air passage, 6a...Part surrounding the left and right sides of the furnace body, 60...Intake port, 7...Air guide pipe, 7
a... Tip opening, 80... Wind barrel, 81... Axial flow blower.

Claims (1)

[Scope of utility model registration request] A primary combustion chamber W consisting of an empty chamber in which rice husks do not flow into the lower surface side in the middle part of the inner cavity of a cylindrical furnace body 1 having an input port a for rice husks at the top and a roaster b at the bottom. A combustion tube 3 is installed in the empty space W below the sink plate 2.
In a rice husk combustion device provided by connecting
An air path y is formed between the sink plate 2 and the sink plate 2, and the air path y
An intake port 51 opening to the outer surface of the furnace body 1 is installed on the upper end side, and the side end side of the air path y is connected to a cooling air path 6 installed in a jacket shape around the outer periphery of the furnace body 1, A rice husk combustion device characterized in that the cooling air passage 6 is connected to an air guide pipe 7 surrounding the combustion tube 3 and facing the suction port of the suction fan F.