JPS582507A - Burning method of solid - Google Patents

Abstract

PURPOSE:To obtain burning method of solid, through which fuel is burnt effectively even if powderly wolid is mingled with it, by pelletizing the unburnt solid contained in an exhaust gas, and burning in a combustion furnace. CONSTITUTION:Massive solid in a solid fuel is supplied into a combustion furnace 1 through a fuel supply device 2. On the other hand, powderly solid is sent to a pelletizing device 7 through a transportation means 10. The unburnt solid within exhaust gas from the combustion furnace 1 is collected by an unburnt solid collector 4, and sent to the pelletizing device 7 through the transportation means 5. In the pelletizing device 7 the mixture of the solid and the powdery solid are made into a pellet form which is sent to the combustion furnace 1. Thus, even if a large quantity of the powdery solid is contained in the fuel it is used as fuel and its combustion efficiency is improved, too.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid material combustion method for burning solid materials such as coal, wood chips, pitch, and plastics in a combustion furnace 9, such as a stoker-fired combustion furnace.

A conventional combustion method will be explained based on the embodiment shown in FIG. - In the combustion furnace 01, solid carved pieces and powdered solids are placed in the combustion furnace 01.
A fuel supply device 02 is provided to supply fuel into the combustion furnace 01.
An unburnt solids collection device 04 is provided in the middle of a duct 03 provided at the exhaust gas outlet of the engine. At the unburned solids outlet of the unburned solids collection device 04, the unburned solids are transferred to the combustion furnace 0.
The combustion furnace O1 is connected to a blower 06 for supplying combustion air to the combustion furnace O1.

A lumpy solid is supplied into the combustion furnace O1 from a fuel supply device 02, and the solid is combusted by air supplied via a blower 06. Ash and unburned solids contained in the exhaust gas flowing in the duct 03 are separated by an unburnt solids collector 04,
The ash is discharged to the outside of the furnace, and the unburned solids are again supplied into the combustion furnace 01 via the transportation means 0.5 and re-burned.

In the conventional method, even if the recovered unburned solids are returned to the combustion furnace 01, 1. It was not completely combusted and was carried out of the system as unburned matter, requiring time and effort to dispose of it. Furthermore, the lumpy solids supplied from the fuel supply device 02 into the combustion furnace 01 also contain a large amount of powdery solids, and due to the mixture of lumpy solids and powdery solids, the amount of powdery solids is higher than in the case of only lumpy solids. It burns and K<
<There was an example of increasing the power of the blower 06. For this reason, it is necessary to separate the powdery solids in the pre-processing stage and then use only the lumpy solids as fuel, which requires several trips and circulation between the unburned solids collector 04 and the combustion furnace 010. Measures were taken to prevent clogging and abrasion of the circulation system, such as increasing the capacity of the unburned solids collector 04.

SUMMARY OF THE INVENTION Therefore, the present invention has been made with the object of providing a method for burning solid materials to efficiently and stably burn solid fuel and unburned matter discharged from a combustion furnace. There is one invention per book.

In a solid matter combustion method, in which a hard mackerel is supplied into a combustion furnace and combusted, and unburned solid matter in exhaust gas discharged outside the furnace is recovered and then supplied into the furnace and re-burned, the solid matter is The present invention provides a solid matter combustion method, which comprises separating solid matter into lumpy solids and powdery solids, turning the lumpy solids into pellets in a furnace, and feeding the pellets into the furnace for combustion.

According to the method provided by the present invention, unburned solids and powdered solids in exhaust gas are removed from the periphery 1. Since the unburned solids are combusted in the combustion furnace, the combustion efficiency is improved because unburned solids are not discharged outside the furnace, and combustion is stabilized due to the reduction of powdery solids, increasing the capacity of the equipment. Even if powdery solids are mixed in the fuel, it can be burned efficiently and the fuel is completely combusted, eliminating the need for multiple circulations within the system and reducing clogging and abrasion within the system. There are fewer troubles and only the ash is discharged as waste, making disposal easier, and even if the fuel contains a large amount of powdery solids, it can be used as fuel, and various other fuels can be used. can get.
・Furthermore, the present invention provides that when solids are fed into the combustion furnace and combusted, unburned solids in the exhaust gas discharged outside the furnace are collected and then fed back into the furnace for regeneration. solids to be burned, l
In the burning method, the solid matter is separated into lumpy solids and powdery solids, and the lumpy solids are fed into a furnace to be burned, and the unburnt solids are removed. After collecting.

Provided is a solid matter combustion method characterized in that the pelletized pellets are mixed with the powdered solid matter, and then the pellets are dried in a furnace or with the heat of exhaust gas, and then fed into a furnace and burned. According to the method of the present invention, the waste heat is further used to dry the perilla pellets, which has the advantage that pellets with sufficient strength can be obtained and troubles in the circulation system can be further reduced.

Next, the present invention will be specifically explained based on a first embodiment shown in FIG.

The combustion furnace 1 is provided with a fuel supply device 2 that supplies lumpy solids into the combustion furnace 1, and an unburned solids collection device 4 is installed in the middle of a duct 3 connected to the exhaust gas outlet of the combustion furnace 1. It is provided. At the unburned solids discharge port of the unburned solids collection device 4, there is a transportation means 5 for guiding the unburned solids into the pellet manufacturing device 7.
is provided. . A classifier 8 for separating solids into lump-like solids and powder-like solids is provided with a transportation means 9 for guiding the lump-like solids from a lump-solid discharge port to the fuel supply device 2, Furthermore, the classifier 8 is provided with a transport means 10 for guiding the powdery solids to the pelletizing production device 7. The pelletizing production device 7 is provided with a transport means 11 that guides the pellets into the combustion furnace 1. Furthermore, the combustion furnace 1 is in communication with a blower 6 for supplying combustion air into the combustion furnace 1. Incidentally, the pelletizing production device 7 is used to pelletize the powdered material using appropriate moisture.

The lumpy solids in the solid fuel are separated from the powdered solids by a classifier 8 and sent to the fuel supply device 2 via a transportation means 9.
The fuel is supplied to the combustion furnace l by the fuel supply device 2. On the other hand, the powdered solids are sent to the pellet manufacturing device 7 via the transportation means 10. Unburned solids in the exhaust gas from the combustion furnace 1 are collected by an unburned solids collector 4.1. The pellets are sent to the pellet manufacturing device 7 by the transportation means 5.

In the pellet production device 7, unburnt solids and powder solids are mixed with appropriate moisture and pelletized, and the pellets are sent to the combustion furnace 1 by means of transportation 11, and burned in the pelletized state in the combustion furnace. do. The unburned solids in the exhaust gas and the powdered solids separated from the fuel are made into pellets using only an appropriate amount of moisture without using a special binder and are burned in a combustion furnace, which requires high costs for pelletizing. The combustion efficiency is good because the unburned solids are not discharged outside the combustion furnace 1 until unburned, and the combustion is stabilized as the powdery solids are reduced, and there is no need to increase the capacity of 2 devices. Even if powdery solids are mixed in, it can be efficiently combusted, and the fuel is completely combusted, so there is no need to open the system multiple times, and there are fewer clogging and abrasion problems in the system, and the only waste is ash. This makes disposal easier than before, and even if the fuel contains a large amount of powdery solids, it can be used as fuel, making it possible to use a variety of fuels.

Next, the present invention will be explained based on a second embodiment shown in FIG.

The apparatus of this example introduces a part of the exhaust gas flowing through the duct 3 into the pelletizing production apparatus 7 of the apparatus of the first embodiment, and a pellet drying apparatus 12 that dries the pellets with the heat of the exhaust gas.
It has been set up.

The rest is the same as the device of the first embodiment.

The explanation of the construction will be omitted here.

The lumpy solids in the solid fuel are separated from the powdered solids in a minute iN8, and are supplied to the combustion furnace 1 by the fuel supply device 2. On the other hand, the powdered solids are sent to the pellet manufacturing device 7. Unburned solids contained in the combustion exhaust gas are separated by an unburned solids collector 4 and sent to a pellet manufacturing device 7. Since a large amount of combustion ash is mixed in the unburned solids sent to the pellet production device 7, it can be easily pelletized without mixing a special binder as long as there is an appropriate amount of moisture. These pellets are solidified to sufficient strength using a pellet dryer that uses residual heat from exhaust gas.

It is sent as pellet fuel to the combustion furnace I, where it is burned.

Therefore, according to this example, it is possible to reduce unburned loss and save labor in waste treatment, stabilize combustion due to the reduction of powdery solids, and use the residual heat of exhaust gas, so it is possible to use a simple device. It is possible to produce a pellet shell with sufficient strength, and problems with the circulatory system are also reduced.

Next, one aspect of the present invention will be explained based on a third embodiment shown in FIG.

In this example, the pellet drying device 12 in the second embodiment shown in FIG. 9. The pellets sent through the pelletizing production device 7 are dried in the pellet drying device 12, using the heat in the combustion furnace 1. It is supplied to the combustion bed at the bottom of the hearth.

The effects of this example are almost the same as those of the second embodiment, so the explanation thereof will be omitted here.

[Brief explanation of drawings]

FIG. 1 is a flowchart of an apparatus for carrying out a conventional solid matter combustion method, and FIGS.
The flowchart on the i-machine side of the third implementation is shown below. 01, l... Combustion furnace, 02,2... Fuel supply device. 04.4...Unburnt solids collection device, 06,6...Blower, 7...Pellet drying device, 8...Classifier. 12... Pellet drying device. N4 diagram

Claims (1)

[Claims] +11 When solids are supplied into the combustion furnace and combusted, the unburned solids in the exhaust gas discharged outside the furnace are “recovered and then supplied and supplied to the furnace for reuse.” In the solid matter combustion method, the solid matter is separated into a lump-like surface carved material and a powdered solid material, and the solid material is fed into the lump-shaped carved material 1% furnace and burned.The unburned solid material is A solid matter combustion method characterized in that, after being collected, the solid matter is mixed with the powdered solid matter, pelletized, and fed into a furnace for combustion. (2) KIi shaped sculptures are fed into the combustion furnace and burned. In addition, in a solid combustion method in which unburned solids in the exhaust gas discharged outside the furnace are collected and then supplied into the furnace for reburning and burning, the solids are converted into lump solids and powdered II shape carvings. The lumpy solids are fed into the furnace and burned, and the unburnt solids are collected and mixed with the powdery solids to pelletize them, and then stored in the furnace or in the exhaust gas. A solid matter combustion method characterized by drying the pellets with heat and supplying the pellets into a furnace for combustion.