JPS6311446Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice hull combustion device that can effectively use the combustion hot air of rice hulls as a heat source for drying.

The dust flames from the rice hulls discharged from the combustion furnace are mixed with the intake outside air to generate hot dust air, which is separated into clean hot air and hot dust air by the dust removal cyclone, and only the clean hot air is produced. In the case of rice husk combustion equipment, which is used as a heat source for drying dried materials and the hot exhaust air is dissipated to the outside, if a large amount of dust is included in the hot exhaust air that is radiated into the atmosphere, it will cause dust pollution. Therefore, in order to solve this problem, in the past, the dust was removed using a plurality of dust removal cyclones and then released into the atmosphere.

Therefore, conventional devices of this type require a large number of dust removal cyclones, making the overall structure of the device complex and expensive, as well as causing a loss of thermal energy due to the dissipation of hot air at a considerable temperature into the atmosphere along with the dust. This caused a strong need for improvement.

In view of the above, the present invention uses forced air to blow the paddy husk supplied into the conveyor cylinder into the combustion furnace body without dissipating the hot dust air separated from the clean hot air by the dust removal cyclone into the atmosphere. The number of dust removal cyclones is significantly reduced, and the entire device can be provided at a low cost. At the same time, the hot air at a considerably high temperature preheats the paddy husk while it is being transported, promoting complete combustion, and at the same time cleaning the area around the dust. The present invention aims to provide a rice hull combustion device that eliminates scattering, and the configuration of the device according to the present invention will be described below with reference to a preferred embodiment shown in the accompanying drawings.

In the drawing, 1 is a combustion furnace main body for completely burning the supplied paddy husk by the supplementary action of primary and secondary air for combustion, and the combustion ash of the paddy husk is provided at the lower part of the combustion furnace main body 1. It is designed so that it can be discharged to the outside from the discharge tube 2 at any time. A dust flame flow passage 3 is opened in the upper part of the combustion furnace main body 1, and the dust flame flow passage 3 communicates with a chamber 4 provided at the upper part of the combustion furnace main body 1 and having a relatively large space. ing.

An intake cylinder 5 is open-connected to the upper part of the chamber 4, and a base end side of a dust hot air pipe 7 whose other end is connected to a dust removing cyclone 6 is connected to one side of the chamber 4. The dust removal cyclone 6 separates the hot dust air sucked through the hot dust air pipe 7 into clean hot air and hot dust air.
A clean hot air pipe 9 for supplying clean hot air into the temperature-controlled room 8 is open-connected to the lower center of the cyclone 6, and a dust suction tube 10 is installed on one side of the outer periphery of the dust removal cyclone 6 to remove hot dust air by suction. One end is open connected.

The temperature-controlled room 8 has a hollow interior, and a hot air blower 11 is installed on the intake side of the temperature-controlled room 8.
A hot air cylinder 12 is connected to the discharge side of the temperature control chamber 8.
The clean hot air generated within the drying device is continuously supplied to a drying device (not shown).

Therefore, a part of the temperature control chamber 8 is connected to the outside, and the clean hot air and the intake outside air are appropriately stirred and mixed to generate clean hot air at a desired temperature.

13 is the combustion furnace main body 1 by blowing the rice hull with forced air.
The blower 13 is a blower for supplying air into the combustion chamber at any time, and the base end side of a conveying cylinder 14 is connected to the discharge side of the blower 13, and the front end side is open-connected to the inside of the combustion furnace main body 1. Reference numeral 15 denotes a supply hopper containing paddy hulls, and at the bottom of the supply hopper 15 there is a carry-out tube 16 in which a conveyance screw 17 is rotatably suspended horizontally.
is installed so that the supply side of the is connected, and
The upper end opening of a carry-in tube 18 equipped with a rotary supply valve 19 is connected to the carry-out side of the carry-out tube 16, and the lower end opening of the carry-in tube 18 is connected to an appropriate position of the conveyance tube 14.

One end of the dust suction tube 10 is open-connected to the outer periphery of the dust removal cyclone 6, and the other end is connected through the collection cyclone 20 to the intake side of the blower 13 to collect and remove dust contained in the hot dust exhaust air. Then, a certain amount of clean hot air is supplied to the blower 13. Note that the collection cyclone 20 may be omitted if necessary without causing any problem. Further, the dust suction cylinder 10 located near the blower 13 is provided with an outside air intake port 21 whose opening can be adjusted.

Next, the operation of the present invention will be explained.

Now, if the blower 13, conveyance screw 17 and rotary supply valve 19 are operated, the paddy hulls stored in the supply hopper 15 will be transferred through the conveyance tube 14 through the unloading tube 16 and the carry-in tube 18 through which forced air is flowing. After being supplied to the combustion chamber in an appropriate amount, it is carried into the combustion furnace main body 1 along with forced air. If the rice husk carried there is ignited and primary air for combustion is replenished into the combustion furnace main body 1 at the same time, the rice husk will be completely combusted in the combustion furnace main body 1, and the dust flame will be sent from the dust flame flow path 3. It ejects into the upper chamber 4. Therefore, when the hot air blower 11 is operated, the suction effect caused by the operation of the hot air blower 11 and the blower 13 causes not only the inside of the room 4 but also the suction pipe 5, the hot dust pipe 7, the dust removal cyclone 6, the temperature control room 8, and the dust suction pipe. 10. All of the collection cyclones 20 are in a negative pressure state, and the high-temperature dust flame discharged into the chamber 4 and the outside air taken in from the suction pipe 5 are well stirred and mixed in the chamber 4, which has a large capacity. The hot air becomes high-temperature exhaust dust and is sucked into the dust removal cyclone 6, where it is separated into clean hot air and hot exhaust air. Only the clean hot air is sucked into the temperature-controlled room 8 through the clean hot air pipe 9, where it is mixed into hot air at a temperature that is effective as a heat source for drying. The air is then blown to a drying device (not shown) to achieve a good drying operation. On the other hand, the high-temperature dust hot air separated by the dust removal cyclone 6 is quickly removed by the collection cyclone 20 on the way, and the hot air, which has become somewhat clean, is sucked into the blower 13 and then transferred to the conveyor cylinder 14. pumped inside.

Therefore, a rotary supply valve 1 is installed in the delivery tube 18.
The paddy hulls fed into the conveying cylinder 14 at any time by 9 are
As a result, the temperature of the rice husk itself increases during the transportation process and is supplied into the combustion furnace main body 1, and at the same time, the hot exhaust air is also blown into the combustion furnace main body 1. It is used as secondary combustion air while re-combustion is performed. Therefore, complete combustion of the rice husk is promoted by the residual heat effect, and the hot exhaust air is also re-burned, and the combustion state is maintained without dust being released into the atmosphere, making it easy to use hot air as a drying heat source. Obtainable.

In short, since the present invention has the above-mentioned configuration, the dust flame of rice husk discharged from the combustion furnace main body 1 is mixed with the intake outside air in the chamber 4 to form a large volume of hot dust air. The hot dust air is separated into clean hot air and hot dust air by the dust removal cyclone 6, and only the clean hot air is used as a heat source for drying.Even in rice husk combustion equipment, the high temperature hot dust air separated by the dust removal cyclone 6 is transferred to the atmosphere. It is used as a wind source for air conveyance of the paddy husk without dissipating it inside, and it is smoothly supplied into the combustion furnace main body 1 while preheating the paddy husk.
This promotes complete combustion and at the same time makes it possible to easily achieve re-combustion of the hot exhaust air.As a result, the number of dust removal cyclones 6 can be significantly reduced, making it possible to provide the entire device easily and inexpensively, as well as removing dust. The effect is that combustion can be carried out without causing dust pollution by completely eliminating the scattering of the fuel around the surrounding area.

[Brief explanation of the drawing]

The drawing shows one embodiment of the device according to the present invention, and is a partially cutaway front view with main parts cut away. 1... Combustion furnace main body, 4... Chamber, 5... Intake cylinder,
6...Dust removal cyclone, 7...Dust removal hot air pipe, 10
...Dust suction tube, 13...Blower, 14...Transportation tube.

Claims (1)

[Scope of utility model registration request] A chamber that mixes the dust flame discharged from the combustion furnace body with intake outside air to produce hot dust air, a dust removal cyclone that separates the hot dust air into clean hot air and hot dust air, and a transfer tube that is supplied to the chamber. In the furnace, the chamber and the dust removal cyclone are connected to a dust removal hot air pipe, and the dust removal cyclone and the intake side of the blower are connected to the dust removal side. A rice husk combustion device characterized by being connected to each other by a cylinder.