JPH05288317A - Loading device for waste material melting furnace - Google Patents

Abstract

PURPOSE:To provide a loading device eliminating displacement distribution and having a low height by a method wherein the charging device is connected to a supplying source and a loading shoot capable of swivelling within a range of the charging port of block carbonic combustible substances and further being inclined from a waste material loading cylinder. CONSTITUTION:In the case that the waste material A is loaded within a loading cylinder 5 together with block-like cokes B and lime stones C are cubic material, the waste material A is fed at a feeding port 12, a loading shoot 13 is rotated and the material is loaded while the shoot is being inclined within a range of a diameter of the loading cylinder 5. In the case that the waste material A and the lime stones C are loaded into the loading port 7 from a loading shoot 13, the amount of block-like cokes B in respect to the waste material is loaded from a cokes loading inlet 7 into the furnace. With such an arrangement, a height of the loading device is restricted low and then the charged materials dispersed into each of the charging regions are uniformalized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to municipal solid waste, various industrial wastes, or intermediate products obtained by drying, incineration, crushing, etc., using a lumpy carbonaceous combustible substance such as coke as a heat source. The present invention relates to a charging device 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 makeup aggregate.

[0002]

2. Description of the Related Art The applicant of the present application discloses, in Japanese Patent Laid-Open No. 3-5611, a tuyere at the bottom of a hollow cone-shaped furnace body whose upper part is enlarged and whose inner surface is formed at an angle not less than the repose angle of a massive carbonaceous combustible material. Is provided, and a tap hole is provided at a position lower than the same
A waste charging cylinder is inserted from the center of the upper surface of the furnace body so that the tip is located above the tuyere, and a plurality of massive carbon combustible material charging ports 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 substance is charged together with waste from a waste charging cylinder in the center to form a filling area mainly composed of waste at the bottom of the charging cylinder. Moreover, the operating method is disclosed in which the area filled with the massive carbon combustible material charged from the inlet of the massive carbon combustible material is surrounded around the packed area mainly composed of the waste.

By such an operating method, the massive carbonaceous combustible substance as a heat source can be surely supplied to the high-temperature hearth below the waste packed bed, and the high-temperature combustion gas generated mainly from the high-temperature hearth is permeable. Good Dust scattering from waste can be minimized by passing through the packed bed of carbonaceous combustible material around the waste packing area, and dust once scattered is captured in the process of passing through the packed bed of carbonaceous combustible material. Therefore, there is an advantage that dust accompanying exhaust gas finally discharged from the furnace can be suppressed.

In the operation of such a melting furnace, it is necessary to surely form a high-temperature hearth as a furnace heat source and to let the uniform combustion gas pass through the waste filling area to minimize the amount of coke and to improve the operating efficiency of the furnace. It is extremely important to raise.

For this reason, as a method of mixing the massive carbonaceous combustible substances into the waste into the furnace, there is a method of mixing in Japanese Patent Publication No. 58-38694.
A method in which the waste described in Japanese Patent Publication and a lumpy carbon-based combustible substance are mixed in a predetermined ratio in advance and charged by a charging cone;
Alternatively, the charging chute disclosed in Japanese Examined Patent Publication No. 2-606 is inserted obliquely from the side wall of the furnace to alternately charge a predetermined amount of waste and massive carbonaceous combustible substances, and waste and massive It is possible to adopt a method of forming a filling layer in which a carbon-based combustible substance is laminated on each other.

However, when the lumpy carbonaceous combustible substance charged together with the treated waste is charged unevenly on one side of the charging cylinder, the consumption of the lumpy carbonaceous combustible substance at the uneven portion progresses. However, the required amount of heat is insufficient in the part where a large amount of waste is present, and finally the high temperature hearth cannot be formed in this part, and the throughput of the furnace decreases. Furthermore, when charging the charging material into the charging cylinder and the surrounding charging port, the switching chute and each charging port are connected by a pipe for transportation as the simplest method of switching the charging material. However, in order to prevent the charging material from being clogged in this pipe, it is necessary to set the inclination angle of the pipe, which increases the height of the charging device portion.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the deviation distribution of the charge and to provide a charging device having a low height without affecting the basic structure of the melting furnace. It is in.

[0008]

According to the present invention, a tuyere is provided in a lower portion of a furnace body whose upper portion is enlarged and whose inner surface is formed into a hollow cone shape.
A tap hole is provided at a position lower than the tuyere, the treatment waste charging cylinder is inserted from the center of the upper surface to a position where the lower end is higher than the tuyere, and a plurality of agglomerated carbon particles are provided around the treatment waste charging cylinder on the upper surface. A charging device of a waste melting furnace in which a charging port for a system-based combustible substance is arranged, which is connected to a supply source of charging raw material, and from the introduction port of the central processing waste charging cylinder, It is characterized by having a charging chute that can swivel and tilt within the range of the charging port for the massive carbonaceous combustible material.

[0009]

By rotating the charging chute around the charging cylinder, it is possible to make the circumferential balance of the charging material charged into the charging cylinder uniform. Further, by tilting within the range, the charging cylinder can be evenly distributed in the radial direction.

Further, by changing the tilt angle of the charging chute, it is possible to easily switch from the charging cylinder at the central position to the charging port in the periphery.

[0011]

EXAMPLES As an example, an example of a melting furnace in which coke is used as a lumpy carbonaceous combustible substance and the lumped coke is charged together with waste will be described.

FIG. 1 shows a waste melting furnace and a charging device to which the present invention is applied.

In FIG. 1, a waste melting furnace 10 has a hollow cone-shaped furnace body 1 with an enlarged upper part, and has two upper and lower tuyeres 2 and 3 at its lower part and a lower position. The gate 4 is formed.

The furnace body 1 is provided with waste A which is a material to be melted.
A charging cylinder 5 for charging a charging mixture of agglomerate coke B and limestone C is inserted from the center of the upper surface of the furnace body 1 to a position above the upper tuyere 2, and waste is disposed at a lower position in the furnace. A filling area 6 is formed, which is mainly composed of A, and in which the waste coke B and limestone C are quantitatively mixed, and the waste A is mainly.
Further, a coke charging port 7 for charging four coke coke B arranged at equal intervals is provided around the upper surface of the furnace body 1. From the coke charging port 7, the coke coke B is introduced.
The waste A and the limestone C are charged together, and the filling area 8 mainly containing the lump coke B is formed so as to surround the filling area 6 mainly containing the waste A. 9
Shows an outlet for discharging the combustion exhaust gas E of the charged coke.

Reference numeral 11 denotes a charging portion connected to a charging cylinder 5 on the upper surface of the furnace body, waste A forming an introduction path to the charging port 7, massive coke B, and limestone C (not shown).

In the charging section 11, there are disposed a waste A as a charging material, a lump coke B, and a charging port 12 for limestone C, and the charging chute 1 is located immediately below the charging port 1.
3 is provided so as to be rotatable around the pivotal portion 14 and tiltable.

When the charging cylinder 5 is charged with the lump coke B mainly composed of the waste A and the limestone C, the charging port 1
The charging is started from 2, the charging chute 13 is rotated, and the charging is performed while tilting within the diameter range of the charging cylinder 5. As a result, the charging cylinder 5 is filled with the respective charging materials, and a similar charging area 6 mainly containing the waste material A is formed below the furnace.

Further, from the charging chute 13 into the charging port 7, the waste coke B and the waste A and the limestone C are mainly contained.
At the time of charging, the amount of the lump coke B with respect to the waste A is adjusted to a ratio necessary for forming the filling zone 8 mainly composed of the coke B, and is charged into the furnace from the coke charging port 7. Then, the waste A is formed around the filling area 6 mainly.

As a result, the height of the charging device is kept low, and the charging materials dispersed in the respective filling zones 6 are made uniform, so that the high-temperature hearth zone 15 is surely formed in the hearth, and
A high-temperature coke grate can be maintained stably, the gas in the furnace uniformly passes through the furnace, the waste A in the filling areas 6 and 8 is heated and melted, and the obtained melt is stabilized from the tap 4 Can be extracted.

[0020]

The present invention has the following effects.

(1) It is possible to achieve the function of uniform distribution and the function of switching by one set by one charging device, the structure of the charging device is simplified, and the height is kept low, so that the construction cost can be reduced. Can be cheaper.

(2) A waste melting furnace with high thermal efficiency can be realized by improving the preheating drying effect by forming a uniform combustion gas flow.

(3) The high-temperature hearth can be reliably formed, and even if the waste has poor air permeability, dust scattering is suppressed, while maintaining air permeability and unloading, a stable melting process can be performed.

[Brief description of drawings]

FIG. 1 shows an embodiment apparatus to which the present invention is applied.

[Explanation of symbols]

A waste B coke C limestone 1 furnace body 2,3 tuyere 4 tap opening 5 charging cylinder 6 filling area mainly composed of waste 7 coke inlet 8 charging area mainly composed of coke 9 furnace gas outlet 10 Waste melting furnace 11 Charging part 12 Charging port 13 Charging chute 14 Pivoting part 15 High temperature hearth area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsumasa Todaka 59 Nippon Steel Plant Design Co., Ltd. at 46 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture (72) Inventor Kengo Murayama 46 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Of 59 Nittetsu Plant Design Co., Ltd.

Claims (1)

[Claims] 1. A tuyere is provided at a lower portion of a furnace body whose upper portion is enlarged and an inner surface is formed in a hollow cone shape, a tap hole is provided at a position lower than the tuyere, and a treated waste charging cylinder is provided from a center of an upper surface. A charging device for a waste melting furnace, wherein the lower end is inserted to a position higher than the tuyere, and a plurality of massive carbonaceous combustible substance charging inlets are arranged around the treatment waste charging cylinder on the upper surface. Waste having a charging chute that is connected to a source of a raw material and that can swirl and tilt within a range from the inlet of the central processing waste charging cylinder to the charging of the plurality of massive carbonaceous combustible substances Material melting furnace charging device.