JP2600206Y2 - Combustion chamber gas recirculation device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a small incinerator for incinerating garbage, industrial garbage, and the like. In particular, it efficiently recirculates gas in a combustion chamber for completely burning garbage and the like, and also utilizes residual heat. The invention relates to a gas recirculation device for a combustion chamber.

[0002]

2. Description of the Related Art Conventionally, as a small incinerator of this type, a grate (rostotle) is formed in two upper and lower stages, and an interval between the grate is adjusted in accordance with the roughness of garbage introduced into an upper main combustion chamber. , A large amount of refuse is prevented from falling onto the lower grate, and the upper grate is formed in a protruding shape to deposit garbage in a hollow state in the combustion chamber, and the combustion gas on the lower grate is burned to the upper stage. There is known a method in which a garbage is guided to a hollow space to dry the refuse and complete combustion (for example, Japanese Utility Model Publication No. Sho 43-3055).
3 and JP-B-47-16158). There is also known an incinerator in which incomplete combustion gas generated in an incinerator is recirculated to the main combustion chamber to completely burn the gas (for example, see Japanese Patent Application Laid-Open No. 54-78869).

[0003]

[Problems to be Solved by the Invention] Among those described in the prior art, in the former, a grate is formed in upper and lower two stages, and the interval between the grate is adjusted according to the roughness of the input dust. In addition, in the upper and lower combustion chambers generated by the division of the grate, not the complete combustion in the main combustion chamber, but the combustion by the complementary operation with the sub-combustion (drying) chamber, resulting in inefficiency. Had a point.

Further, the latter has a problem that the structure is complicated due to complete combustion of the incomplete gas and the production cost is increased.

The present invention has been proposed by the present applicant as Japanese Utility Model Application No. 61-68490 in view of the above-mentioned problems of the prior art, but has been further improved. It is an object of the present invention to provide a gas recirculation device for a combustion chamber in a compact compact combustion furnace which has a simple structure, good combustion efficiency and eliminates odorous gas.

[0006]

In order to achieve the above object, a gas recirculation apparatus according to the present invention is provided with a furnace body made of a heat-resistant material, an auxiliary exhaust pipe provided with an exhaust pipe communicating with a chimney and a preparation valve. An exhaust mechanism, a rostral provided to divide the combustion chamber up and down, an air intake pipe communicating with the exhaust stack, and a furnace body lower surface are formed flat, and an inclined surface is formed at an acute angle upward toward the front projection. Opening with a step is formed in the upper and lower two steps, and each inlet port door is pivotally connected to the furnace bottom formed by the formed furnace bottom and the furnace bottom and the furnace body ceiling, and the door is openable and closable. Air inlet / inlet means, a partition floor having an inclined angle extending below the upper stage of the opening, and a gap provided opposite to the partition floor having a partition floor adjacent to the end of the roster. Things.

[0007]

[Function] In the incinerator of the present invention, the upper and lower entrance doors are opened during combustion, and raw garbage wet garbage and industrial garbage are relatively mixed with good-burning garbage into the upper combustion chamber and injected into the lower combustion chamber. Put relatively good garbage. When these refuse are ignited at the same time, the upper combustion chamber burns relatively high-combustion refuse and holds it while increasing the thermal power. However, the refuse in the lower combustion chamber is actively burned immediately after ignition, and the rising high-temperature exhaust gas is increased. The gas passes through the exhaust stack and is released to the atmosphere from the chimney.However, part of the gas escapes from the gap to the upper combustion chamber, and the thermal power reaches a certain high temperature range. The garbage in the room is dried and the oil-producing garbage is carbonized, which promotes the burning of the garbage.

On the other hand, incomplete combustion gas containing low-temperature and moisture filled in the upper combustion chamber is sucked in accordance with the negative pressure generated in the chimney through an auxiliary exhaust pipe communicating with the exhaust pipe and is radiated to the atmosphere. However, the preparation valve disposed in the auxiliary exhaust stack has a slight opening degree of the ventilation gap set by operation from outside the furnace, and is sucked into the exhaust stack through the auxiliary exhaust stack from the above-described upper combustion chamber. The incomplete combustion gas is mixed with the high-heat exhaust gas rising from the lower combustion chamber, and is released as a gas sufficiently burned and oxidized in the chimney by the intake air from the air intake pipe.
As described above, while the low-temperature incomplete combustion gas generated in the upper combustion chamber is released to the atmosphere, the air is sucked through the air intake and the opening of the intake port. It is promoted by combustion, actively propagates and burns, and the flame is inverted downward into the lower combustion chamber through the rostral ( UPSIDE).
-DOWN BURN) .

[0009] Since the combustion in the lower combustion chamber reaches its climax a little quicker and the room is in a high-temperature and dry state, the lower flaming gas from the upper combustion chamber is further oxidized in the lower combustion chamber, and a part of the lower flammable gas is discharged from the lower combustion chamber. It goes to the exhaust stack together with the gas, but a part of it becomes recirculated gas and enters the upper combustion chamber again from the above-mentioned partition gap. The above-mentioned recirculated gas becomes high-temperature dried gas, enters the upper combustion chamber from the partition gap, mixes with the upper intake air to make garbage combustion extremely good, and since the constant gas recirculation is maintained, soot emitted is sufficiently oxidized. Therefore, the odorous gas is deodorized and released to the atmosphere. Residual ash is the bottom 9 of the lower combustion chamber
After the burn-out cooling, the lower combustion chamber door is opened and the residual ash is taken out with a scoop or the like along the furnace bottom inclination angle.

The present invention adopts the above-described structure, and as shown in FIG. 2, as shown in FIG. When the flammable garbage is charged and ignited before and after at the same time, the lower flammable garbage immediately performs an active combustion action, while the upper mixed garbage ignites the good garbage, but the burning power is weak and sustained combustion. Works. Therefore, in the early stage of the combustion start, the thermal power in the lower combustion chamber 8 steadily increases as a lower flame (b),
The combustion gas generated in the room is divided into two poles, one of which is radiated from the exhaust stack 3 to the atmosphere via the chimney 1, but at this time, the exhaust stack 3 is overheated with the passage of the exhaust gas (hot air), and the upper part is radiated heat. The heat is radiated into the combustion chamber 6 and the dust in the upper combustion chamber 6 is dry-distilled. The other rises (refluxes) as hot air gas into the upper combustion chamber 6 from the gap 14 formed by the partition floor 4 shown in FIG.
Then, by invading the burning debris loaded in the upper combustion chamber 6, it catalyzes the promotion of combustion, and promotes the dry distillation of the debris in the upper combustion chamber 6 as described above. Upper combustion chamber 6
In combination with the continuous combustion action, the above-mentioned radiant heat and the above-mentioned recirculation of the combustion gas (b) from the inside of the lower chamber 8, the dry-dry distillation of the poorly combustible refuse is promoted and the combustion power is increased. The low-pressure incomplete combustion gas (d) having a low humidity causes the negative pressure generated in the exhaust pipe 3 to increase by operating the multi-stage control valve 2 provided in the auxiliary exhaust pipe 11 shown in FIG. Chimney 1 through negative pressure to upper partial space in fuel chamber 6
Is sucked. This prevents the combustion power in the upper combustion chamber from lowering due to the filling of the incomplete combustion gas (d), and the incomplete combustion gas (d) rises from the lower chamber 8 to the exhaust gas (heating gas). And in the chimney, and the chimney 1 is replenished by replenishing air from the air intake pipe 10 shown in FIG.
Burns inside and is released to the atmosphere. The regulating valve 2 does not fully open in the auxiliary exhaust pipe 11, but it suffices to open the regulating valve 2 to an extent necessary for the suction of the incomplete combustion gas (d) depending on the state of the input dust. . However, after a certain period of combustion, the combustion in the upper chamber 6 is accelerated, and the combustion gas (c) generated therefrom is vigorously discharged downward (lower flame) into the lower chamber 8 through the rostrator 7 and the already charged material is discharged. In the lower chamber 8, which is in a high-temperature and dry state near the completion of the incineration, the air is burned more vigorously by the intake air from the lower intake port 16. And
Part of the combustion gas (c) goes to the exhaust stack 3 and part goes to the partition floor 4.5. Reflux gas rises into the upper chamber 6 through the gap 14 and promotes dry distillation and combustion of dust in the upper chamber 6. Further, the input refuse in the lower chamber 8 will soon be in a combustion completed state, and the intake air from the intake port 12 of the upper chamber 6 and the combustion gas in the upper chamber 6 will be mixed with the above-mentioned recirculated gas to cause a mixture in the upper chamber 6. The combustion gas (c) of the garbage (the combustion gas (c) is an incomplete combustion gas at this stage) becomes the above-mentioned lower flame, vigorously and continuously burns in the lower chamber 8 where the combustion conditions are adjusted, and The inside of the upper combustion chamber 8 reaches an equilibrium state of high-temperature heated vortex flame combustion, and as long as the combustion products (garbage) in the upper combustion chamber 6 maintain a constant combustion, the lower flame of the reflux gas and the combustion gas continues, and the lower combustion chamber The high-temperature heating combustion state in the inside 8 is maintained, and the combustion is completely gasified and no smoke is released to the atmosphere.

The furnace body is composed of a chimney 1, an exhaust pipe 3, and a main furnace having a cylindrical inside and a square-shaped front side of the furnace. The bottom of the cylindrical portion is formed flat and formed so as to have an inclined surface toward the angular projection, forming a furnace bottom 9, and an opening having a projection step with the upper surface of the main body is formed in two upper and lower stages. And
Opening / closing doors 13 and 15 are pivotally connected to each other, and air inlet / inlet ports 12 and 16 are provided at the center of the opening / closing doors 13 and 15 to open and close freely.

Inside the furnace wall, a protruding branch is provided on the peripheral wall near the opening of the end of the exhaust stack 3 and the rostr 7 is mounted in a floating manner and divided into upper and lower combustion chambers 6 and 8. A partition floor 4 extending downwardly at an inclined angle into the furnace below the upper opening to be pivoted.
And a gap 14 formed by a partition floor 5 having both ends fixed to the furnace inner wall so as to have an inclination angle in front of the rostr 7.

The combustion chamber 8 is located directly below the combustion chamber 6 with an inlet 15 pivotally connected thereto. The ceiling of the combustion chamber 8 has a lowermost hole of the exhaust pipe 3, the rostr 7, the partition floor 4, the partition floor 5, and a gap. The furnace bottom 9 is flat and has an inclined surface 9 connected to the lower edge of the lower opening of the furnace front. The present invention does not require a separate ash chamber.

The exhaust pipe 3 has a two-stage structure having different diameters.
The lower end of the large-diameter cylinder is vertically fixed to the furnace ceiling, and a small-diameter cylinder is fitted and connected to the inside of the furnace while being suspended vertically from the large-diameter cylinder. This is to prevent distortion caused by a difference in thermal expansion between the furnace body and the exhaust stack and to improve the heating efficiency of the exhaust stack.

The auxiliary exhaust stack 11 is located at the top of the furnace body, and the regulating valve 2 is disposed at the center thereof. At about 45 degrees, one end is opened in the ceiling of the upper combustion chamber 6 and the other is opened in the exhaust stack. And then set. One end of the air intake pipe 10 is an auxiliary exhaust pipe 11.
And an opening in the exhaust pipe about 2 to 3 cm just above the connecting portion of the exhaust pipe 3 and the other side to the atmosphere, and the diameter of the auxiliary exhaust pipe is 1
３ to １ ／, and 20 to 30 cm in length and fixed almost in parallel to the auxiliary exhaust pipe. The chimney 1 does not need to be made of the same material as the exhaust pipe, and is vertically connected to the exhaust pipe 3 by the connecting member 17. The opening and closing adjustment of the adjustment valve 2 in the auxiliary exhaust cylinder is not shown.

In the present case, by employing the above-described configuration, as shown in FIG. 2, defective combustible waste such as garbage mixed with relatively good combustible waste is introduced into the upper combustion chamber 6 and relatively into the lower combustion chamber 8. When the flammable garbage is put in and then ignited at the same time, the flammable garbage in the lower portion will soon be actively burnt, and the flammable garbage in the upper mixed garbage will maintain sustained combustion. The thermal power in the lower combustion chamber increases steadily, and the exhaust gas passes through the exhaust stack 3 and diffuses to the atmosphere via the chimney 1.

The exhaust stack is heated, radiating radiant heat to the upper combustion chamber to dry distill refuse in the upper combustion chamber. Wet low-temperature incomplete combustion gas is generated in the upper combustion chamber,
The air is sucked into the exhaust pipe 3 through the auxiliary exhaust pipe 11, mixed with the heating gas rising from the lower combustion chamber 8, mixed with the air sucked from the air suction pipe, burned in the chimney, and released to the atmosphere.
The combustion in the upper combustion chamber 6 proceeds, and the combustion gas is released through the roaster, and is further oxidized in the lower combustion chamber which has already been dried at a high temperature.
To the upper combustion chamber via The air sucked from the upper intake port 12 is mixed with the recirculation gas from the lower portion to form a gas mixture, which greatly promotes the combustion of dust in the upper combustion chamber. At the same time, the recirculation gas becomes more complete combustion gas.

[0018]

Since the present invention is configured as described above, it has the following effects.

The partition floor 4 has a step and crosses each other.
5 and the gap 14 are formed, so that the
Exhaust tube 3, auxiliary exhaust tube 11, air intake / intake port 12.1
Inverse Downside Flame (UPSIDE-DO)
WN BURN), which has greatly improved the combustion efficiency as compared with conventional incinerators of this kind.

The recirculation of the gas generated in the combustion chamber has a long combustion time, the released gas is sufficiently oxidized, and the odorous garbage is deodorized.

As described above, the structure of the furnace is simplified since there is little residual ash for complete incineration with good combustion efficiency.
Further miniaturization was achieved.

In the fabrication process of the furnace configuration, the use durability was improved in consideration of the balance between the expansion and heating of the material.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram of a gas recirculation state according to the same example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chimney 2 Adjustment valve 3 Exhaust stack 4.5 Cutting and cutting bed 6.8 Upper / lower combustion chamber 7 Rostor 9 Furnace bottom 10 Air intake pipe 11 Auxiliary exhaust cylinder 12/16 Upper / lower air intake / intake port 13.15 Upper and lower inlet doors 14 Clearance 17 Connecting tool b Outside air (air) b Lower flame c Upper flame d Incomplete combustion gas (or low temperature gas)

Claims (1)

(57) [Scope of request for utility model registration] 1. An exhaust mechanism having a furnace body made of a heat-resistant material, an auxiliary exhaust pipe provided with an exhaust pipe communicating with a chimney and an adjustment valve, and a roster provided flat to divide a combustion chamber into upper and lower parts. An air suction pipe communicating with the exhaust stack, a furnace bottom formed flat with a furnace body bottom surface and having an inclined surface at an acute angle upward to a front protruding portion in front, and a furnace bottom and a furnace body ceiling portion. An opening door having a projecting step at the front of the furnace body formed by the furnace body side wall and formed in two upper and lower stages, an openable / closable input port door, and an air intake / intake port means pivotally connected to the input port door; And a gap in which the furnace wall is extended inward with a downward inclination angle at the lower side, and a partition floor connected to the furnace wall at the tip of the rostral is provided oppositely with a step. Gas recirculation device for the combustion chamber.