JP2629109B2 - Cutting device in waste melting furnace charging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to municipal solid waste, various industrial wastes, or intermediate products obtained by drying, incineration, crushing, etc., using a massive carbon-based combustible material such as coke as a heat source. The present invention relates to an apparatus for charging a charge in a waste melting furnace which is heated and melted and recovered as a civil engineering material, a concrete fine aggregate, and a slag material for a surface decorative aggregate.

[0002]

2. Description of the Related Art The applicant of the present invention discloses a tuyere described in Japanese Patent Application Laid-Open No. Hei 3-5611, in which a lower part of a hollow cone-shaped furnace body whose upper part is enlarged and whose inner surface is formed at an angle equal to or larger than the angle of repose of the massive carbon combustible material. , And furthermore, a tap is provided at a position lower than the tuyere,
A waste charging cylinder is inserted from the center of the upper surface of the furnace body so that the tip thereof is positioned above the tuyere, and a plurality of inlets for lumpy carbon combustible materials are provided on the periphery of the upper surface of the furnace body, and exhaust gas is provided above the furnace body. In a waste melting furnace provided with an outlet, a bulk carbon combustible material is charged together with waste from a central waste charging cylinder to form a filling area mainly composed of waste at the lower part of the charging cylinder, In addition, there has been disclosed an operation method in which a filling area of the massive carbon combustible material charged from the charging port of the massive carbon combustible material is surrounded around a filling area mainly composed of the waste.

[0003] With this operation method, the massive carbon-based combustible material, which is a heat source, can be reliably supplied to the high-temperature hearth below the waste packed bed, and the high-temperature combustion gas mainly generated from the high-temperature hearth is ventilated. By passing through the bulk carbon-based combustible material packed layer around the good waste packed area, dust from the waste can be minimized, and the dust once scattered passes through the bulk carbon-based combustible material packed layer. There is an advantage that dust accompanying the exhaust gas that is trapped and finally discharged from the furnace can be suppressed.

In the operation of such a melting furnace, it is necessary to reliably form a high-temperature hearth as a furnace heat source and to allow a uniform combustion gas to flow through a waste filling area, thereby minimizing the required amount of coke and improving the operating efficiency of the furnace. It is very important to raise it.

[0005] For this reason, as a method of charging the waste into the furnace, the waste described in Japanese Patent Publication No. 58-38694 and the massive carbon-based combustible material are mixed in a predetermined ratio in advance and charged by a charging cone. Adoption of the method of entering
No. 606 is inserted obliquely from the side wall of the furnace, and a predetermined amount of the waste and the massive carbon-based combustible material are alternately charged. May be employed to form a filling layer in which the layers are stacked.

[0006] However, in any of the methods, the amount of the lump-sum carbon-based combustible material varies for each charge.
The amount (mass ratio) of lumpy carbon-based combustibles with respect to the waste in each layer fluctuates. When the low fuel ratio reaches the furnace bottom, the bottom cools down, and when the fuel ratio is high, fuel is consumed more than necessary. Will be done.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a furnace in which wastes and massive carbon-based combustible materials are charged with each other due to changes in the particle size, specific gravity, or physical properties of the charged materials. An object of the present invention is to provide a charged material cutting-out apparatus capable of uniformly charging a predetermined amount of charged material without receiving the same and making the fuel ratio in the furnace uniform regardless of the charging timing.

[0008]

According to the present invention, a tuyere is provided at a lower portion of a furnace body having an upper portion enlarged and an inner surface formed in a hollow cone shape.
A hot water outlet is provided at a position lower than the tuyere, and a processing waste charging cylinder is inserted from the center of the upper surface to a position where the lower end thereof is higher than the tuyere. An inlet for flammable materials is placed, and a trough is supplied from the supply hopper of the waste melting furnace with an exhaust gas outlet on the top.
A device for cutting out a charge that cuts out the charge through
A plurality of disks having the same horizontal rotation axis at the center are installed at a distance from each other, and a plurality of disks are shifted from the center axis to the outer peripheral end between the disks, and the phases are shifted between the disks. Radial direction of the impeller where the partition plate is arranged ,
Inclined troughs for side loading
The trough tip and the impeller exit are provided.
A space is provided above the meeting part.

[0009]

According to the present invention, when charging the massive carbon-based combustible material into the charging cylinder, each partition is formed by each of the impellers constituted by the disks and the partition disposed therebetween. Only the amount stored at a specific angle of repose is stored in the storage space, so that there is no bite between the partition plate and the casing, and smooth quantitative cutout is possible.

In addition, the intermittent charging by the impeller can be made closer to the continuous charging by gradually shifting the phase of the adjacent impeller.

[0011]

FIG. 1 shows a waste melting furnace to which the present invention is applied, a charging system to which the present invention is applied is indicated by a solid line, and an exhaust gas system is indicated by a broken line. An example applied to charging of coke to be charged together with waste is shown.

In FIG. 1, a waste melting furnace 10 has a hollow cone-shaped furnace body 1 whose upper part is enlarged. At the bottom,
A tuyere 2 is formed in two upper and lower stages, and a tap hole 4 is formed below the tuyere. Waste A which is the material to be melted and massive coke B
And a limestone C are charged from a charging cylinder 5 inserted from the center of the upper surface of the furnace body 1 to a position above the upper tuyere 2, and mainly a waste A is located at a lower position in the furnace. Then, a filling area 6 mainly composed of a waste in which the massive coke B and the limestone C are quantitatively mixed is formed. The coke charging inlet 7 for charging four cokes B arranged at equal intervals on the periphery of the upper surface of the furnace body 1 is charged with the coke B alone, and the filling area mainly composed of waste. A surrounding area 6 is filled with a simple coke filling area 8.

The air introduced from the upper tuyere 2 burns coke, and the combustion gas is exhausted from a coke filling zone 8 as exhaust gas E from an outlet 9. Further, the coke in the hearth region is burned by air from the tuyere 3 at the lower stage to form a high-temperature hearth 11 made of coke on the hearth. Softening and melting of incombustible components are performed. A ring-shaped coke layer is formed on the peripheral wall side, and the rising gas maintains a uniform flow in the circumferential direction and the flow velocity is increased, so that heat transfer is promoted at the boundary below the filling area 6. Is done. Further, in the high-temperature hearth 11, the central coke of the coke supplied into the charging cylinder 5 is also uniformly burned by the preheated air blown from the lower tuyere 3 to stably maintain a high-temperature coke grate. .

FIG. 2 shows the structure of the cutting device 12 for quantifying the amount of the coke B supplied to the charging cylinder 5 and continuously mixing it with the waste A.

In FIG. 1, reference numeral 13 denotes a supply hopper attached to a base 27. The lump coke B in the supply hopper 13 is cut out and then discarded through the charging cylinder 5 of the melting furnace 10 shown in FIG. The product A and the limestone C are mixed and blended.

An inclined trough 16 is connected to a discharge port 14 of the hopper 13 through an expansion joint 15 such as a bellows. The inclined trough 16 is supported via a spring 17 and vibrated by a vibrator 18 to form a lump. Coke B
Is supplied so as to be smoothly supplied, and furthermore, the introduction port 19 of the cut-out device 12 is provided through the expansion joint 15.
And the massive coke B is continuously supplied to the cutting device 12.

The cutting device 12 is provided inside a casing 20.
It has a structure in which an impeller 23 composed of a plurality of disks 26 having a separation plate 22 that rotates about a rotation shaft 21 is formed. Six separation plates 22 are arranged radially from the rotation shaft 21, and the tip portions 24 are bent in the rotation direction. As a result, the massive coke B from the inclined trough 16 is skimmed at the inlet 19, a space 25 is formed on the upper surface thereof, and after scooping, the stored massive coke B is collected.
Form a repose angle, and the massive coke B in the impeller 23 rotates smoothly without contacting the casing 20 and is discharged.

The impeller 23 is provided in a plurality of rows with the rotating shaft 21 as a rotating shaft, and is further provided with a phase difference in the mounting position of each separation plate 22.

FIG. 3 shows the impellers 2 arranged in a plurality of rows.
Shows a 3 _1, 23 _2, 23 ₃ aspect. The separation plates 22 ₁ , 22 ₂ , and 22 ₃ attached to the respective impellers are attached with their mounting positions shifted from each other, whereby each of the separation plates 22 ₁ , 23 ₂ , and 23 ₃ is rotated. Separation plate 2
2 and _1, 22 _2, 22 ₃ small pitch of the discontinuous release of massive coke B from can be changed to a shape close to a continuous release, is supplied to the loading cylinder 5 of the melting furnace 10.

As a result, the charging ratio of the waste A and the lump coke B to the charging cylinder 5 becomes non-uniform at each charging timing, and the high-temperature hearth can be reliably formed.

[0021]

According to the present invention, a high-temperature hearth is reliably formed by reliably performing quantitative and continuous cutting of massive carbon-based combustible materials, and even if waste having poor air permeability is suppressed, dust is prevented from being scattered. It is possible to realize a waste melting furnace with high thermal efficiency in combination with the improvement of the preheating and drying effect with exhaust gas by maintaining the melting property and the load and stably melting.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a waste melting furnace to which the present invention is applied.

FIG. 2 shows an embodiment of a charge cutting device according to the present invention.

FIG. 3 shows an arrangement state of a separation plate of the charge extraction device according to the present invention.

[Explanation of symbols]

Reference Signs List A Waste B Lump coke C Limestone E Exhaust gas 1 Furnace body 2, 3 Tuyere 4 Hot water outlet 5 Charging cylinder 6 Filling area mainly composed of waste 7 Coke charging inlet 8 Coke plain filling area 9 Exhaust gas outlet 10 Waste melting furnace 11 High temperature hearth 12 Cutting device 13 Supply hopper 14 Hopper discharge port 15 Expansion joint 16 Inclined trough 17 Spring 18 Vibrator 19 Cutting device introduction port 20 Cutting device casing 21 Rotating shaft 22 22 ₁ , 22 ₂ , 22 ₃ Separating plate 23, 23 ₁ , 23 ₂ , 23 ₃ Impeller 24 Tip portion of separating plate 25 Space formed above separating plate 26 Disk 27 Base

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kengo Murayama, Nippon Steel Plant Design Co., Ltd., 46-46 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture (56) References JP-A-3-5611 (JP, A) JP-A-58-177782 (JP, A) JP-A-2-147430 (JP, U)

Claims (1)

(57) [Claims] 1. A tuyere is provided at a lower portion of a furnace body having an upper portion enlarged and an inner surface formed into a hollow cone shape, a tap hole is provided at a position lower than the tuyere, and a processing waste loading cylinder is provided from the center of the upper surface. The lower end thereof is inserted to a position higher than the tuyere, a plurality of inlets for massive carbon-based combustible materials are disposed around the treated waste charging cylinder on the upper surface, and further, an exhaust gas outlet is provided on the upper surface. A device for cutting out a charge from a supply hopper of a melting furnace through a trough , wherein a plurality of disks having the same horizontal rotation axis at the center thereof are installed at a distance from each other, and The radial direction of the impeller in which a plurality of partition plates are arranged with the phase shifted from the center axis to the outer peripheral end between the disks and between the respective disks .
Inclined troughs for side loading
The trough tip and the impeller exit are provided.
A cutting device in a waste melting furnace charging device , wherein a space is provided above a meeting portion .