JPH06174217A - Material-feeding device for fluidized-bed incinerator - Google Patents

Abstract

PURPOSE:To improve the temperature distribution of a fluidized bed and also improve the combustion ratio in the fluidized bed. CONSTITUTION:The base end of a feeding gun 21 is made movable up and down on a support of globular structure 28 as moved by a driving device and the feeding gun 21 is also made movable laterally on the globular structure 28 so that by combining the up-and-down movement and the lateral movement of the tip 22 of the feeding gun 21 the material for incineration in the state of sludge, fed into the feeding gun 21 from a material-feeding device 23, is distributed evenly from the tip of the gun across the surface of the fluidized bed. Therefore, as compared with the conventional rotary shoot, the distribution of the material can be done more uniformly, especially from corner to corner across the surface of the fluidized bed in the case of a square type bed, and the temperature distribution of the fluidized bed becomes more uniform. Since the feeding gun 21 is placed in the lower part of the freeboard, it does not occur for the material thrown in to loosen and be scattered or thrown about as the material falls as in the past. Even in the case of highly vaporizable or volatile material the combustion ratio in the fluidized bed is improved as compared with the conventional methods.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator charging device for a fluidized bed incinerator for charging incinerated substances such as sludge-like substances into a fluidized bed.

[0002]

2. Description of the Related Art Conventionally, in a fluidized bed incinerator, an incinerator is put into only a part of the fluidized bed by a single feeding device, and it is possible to add a part of the incinerated material or a substance that easily reacts in the fluidized bed. There was no need for a very uniform input to the fluidized bed. In addition, it is necessary to uniformly charge the substance, which easily reacts outside the fluidized bed, to the surface of the fluidized bed. That is, for substances that require multipoint injection, many injection guns have been used as an incinerator injection device, and it has been difficult to do so. As described above, unless the fluidized bed is used widely and uniformly and effectively, the temperature distribution of the fluidized bed is poor, and sometimes the freeboard only burns and does not burn in the fluidized bed, and the temperature in the fluidized bed rises. Disappear. A fluidized bed incinerator having a conventional incinerator charging device that solves this problem will be described below.

FIG. 4a is a vertical sectional view showing the structure of a conventional fluidized bed incinerator, and b is a plan view of the conventional fluidized bed incinerator.
In FIGS. 4A and 4B, the incineration material transferred from the incineration material supply device 1 in the incineration material transfer conveyor 2 is input to the input port 4a of the screw conveyor 4 provided at the top of the incinerator body 3. The input incineration product has its discharge port 4b.
Then, the motor 5 and the gears 6 and 7 are put into the rotary chute 8. Thus, the incineration discharged from the discharge port 4b is uniformly distributed on the fluidized bed 9 by the rotation of the rotary chute 8. Then, the incinerated matter is completely combusted by the fluidized air 11 supplied from below the dispersion plate 10, and then discharged as an exhaust gas 12 from the upper discharge port 13 to the outside of the incinerator body 3.

[0004]

However, in the above-mentioned conventional structure, since the distance from the top of the incinerator body 3 to the surface of the fluidized bed 9 is too large, the incinerated matter is easily scattered and easily dispersed and scattered. In the case of incinerated materials that evaporate and volatilize violently, it burns in the fluidized bed, the combustion ratio in the fluidized bed decreases, the temperature in the fluidized bed does not rise sufficiently, and the inflammable part of the incinerated material in the fluidized bed There was a problem that the function of drying and burning to the end was not fully exhibited.

The present invention solves the above-mentioned problems of the prior art by improving the temperature distribution of the fluidized bed and improving the combustion ratio in the bed so that a wide fluidized bed can be used efficiently. An object is to provide an incinerator charging device for a fluidized bed incinerator.

[0006]

In order to solve the above-mentioned problems, the incinerator charging device for a fluidized bed incinerator according to the present invention has a curved tip end located inside the furnace and a base end outside the furnace. A cylindrical charging gun body arranged, a spherical body mounted in the middle of the cylindrical portion of the charging gun body, a spherical bearing installed in the furnace wall below the freeboard and receiving the spherical body; A drive device for swinging the base end portion of the charging gun main body in the vertical direction with the spherical body as a fulcrum and for rotating the charging gun main body by receiving the spherical body by the spherical bearing, and a cylindrical shape of the charging gun main body. And an incinerator supply device for supplying incinerated matter into the unit.

[0007]

With the above construction, the base end of the charging gun main body is vertically swung by the drive device with the spherical body as the fulcrum, and the spherical body is received by the spherical bearing to rotate the charging gun main body. Combining the movement of the tip with the movement in the vertical and horizontal directions, the combustion products supplied from the incinerator supply device into the tubular part of the charging gun body are moved in the horizontal direction while moving in the vertical direction with respect to the layer surface. Since the fuel is distributed evenly, the combustion products are distributed more evenly to the corners of the square-shaped fluidized bed surface, and the temperature distribution of the fluidized bed is more uniform than in the conventional rotary chute charging device. The fluidized bed is widely and uniformly used effectively. Also, since the charging gun body is installed at the bottom of the freeboard, unlike the conventional case, the charging material does not disperse and scatter in the dropping process,
Even in the case of incinerated substances that evaporate and volatilize violently, the combustion ratio in the fluidized bed is improved compared to the conventional case, and the temperature in the fluidized bed is uniform and the inflammable part of the incinerated material is also dried in the fluidized bed. Is burned to the end.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing the configuration of an incinerator charging device in a fluidized bed incinerator according to an embodiment of the present invention. In FIG. 1, a tip chip portion 22 of a cylindrical charging gun 21 serving as an incineration material charging main body portion is formed in a nozzle shape and is curved downward. The base end of the charging gun 21 is connected to the other end of a flexible hose 24 for supplying sludge-like substances, one end of which is connected to a combustion material supply device 23. In the vicinity of the base end portion of the charging gun 21, cooling water pipes 27a and 27b to which a flexible hose 25 for supplying cooling water and a flexible hose 26 for discharging cooling water are respectively connected are provided. , 27b communicate with the inside of the charging gun 21 and circulate the cooling water inside the charging gun 21. Further, the curved portion of the charging gun 21 and the cooling water pipes 27a, 27b
Between the connecting parts of, the spherical balls 28 that make up the spherical body are attached up and down, respectively.
The structure is separable from 21.

A spherical bearing 31 protected by a water cooling jacket 30 is provided inside the vertical refractory outer wall 29 near the surface of the fluidized bed and below the freeboard. The water cooling jacket 30 has a substantially U-shaped cross section, and has an inlet 30a into which cooling water flows in at one end and an outlet 30b into which cooling water flows out from the other end. 30a
A cooling water circulation path is provided between the outlet and the outlet 30b. Further, two spherical seats 32 are provided at upper and lower positions inside the water cooling jacket 30, and the half spherical seats 32 are cooled by the water cooling jacket 30. Further, the outer peripheral surfaces of the upper and lower half-split spherical balls 28 of the charging gun 21 are sandwiched between the inner peripheral surfaces of the upper and lower half-split spherical seats 32 to form the half-split spherical seat 32.
The halved spherical ball 28 is rotatably received within the inner peripheral surface of the. In addition, the vertical wall portion 30 of this water cooling jacket 30
c and the outer wall 29 in contact with the vertical wall portion 30c are provided with an insertion hole 33 into which the tip of the charging gun 21 is inserted inside the furnace. Further, by removing the spherical seats 32 divided into two, the upper and lower spherical balls 28 together with the insertion gun 21 from the insertion hole 33.
Is a structure that can be removed.

Furthermore, the half spherical ball 28 and the cooling water pipe
Between the connecting portions of 27a and 27b, there is provided a support member 34 that rotatably fits and supports the loading gun 21 around the axis of the loading gun 21, and below the support member 34, a supporting member 34 is provided. Arm 35
One end is swingably supported. One end of the arm 36 is swingably supported at the other end of the arm 35. The other end of the arm 36 is fixed to the shaft of the motor 37. The base end of the charging gun 21 is connected to the arrow A through a link mechanism composed of arms 35 and 36 and a speed reducer (not shown).
In the configuration shown in FIG. 3A, the tip end portion of the charging gun 21 is vertically swung in the direction indicated by arrow B with the half-spherical spherical ball 28 supported by the spherical bearing 31 as a fulcrum. Further, a rotation supporting member 38 for rotating the charging gun 21 by a predetermined angle is erected on the outer wall of the charging gun 21, and the tip end portion of the rotation supporting member 38 is an arm 39 as shown in FIG. One end of the arm 39 is swingably supported, and the other end of the arm 39 is swingably supported by one end of the arm 40. The other end of the arm 40 is fixed to a shaft of a motor 42 mounted below the support member 34 via a bracket 41.

The operation of the above arrangement will be described below. First, cooling water is circulated inside the charging gun 21 to cool the charging gun 21. Further, cooling water is circulated inside the water cooling jacket 30 to cool the half spherical seat 32. Then, by rotating the motor 37, the arm 36 fixed to the shaft of the motor 37 is rotated, and the base end of the charging gun 21 is rocked up and down in the direction of arrow A together with the support member 34 via the arm 35. Then, the tip end portion of the charging gun 21 is swung up and down in the direction indicated by the arrow B with the half spherical ball 28 supported by the half spherical seat 32 of the spherical bearing 31 as a fulcrum. At the same time, the motor 42 is rotated to rotate the arm 40 fixed to the shaft of the motor 42, and the rotation support member 38 is rotated via the arm 39.
At the same time, the base end portion of the charging gun 21 is supported by the half spherical seat 32 of the spherical bearing 31 to rotate the half spherical ball 28 in a direction indicated by an arrow C and rotated by a predetermined angle. The part 22 is swung laterally.

At this time, the sludge-like incineration material is supplied from the combustion material supply device 23 through the flexible hose 24 to the base end portion of the charging gun 21. The vertical movement and the lateral movement of the tip portion 22 of the charging gun 21 are combined to allow the sludge-like incineration material to be uniformly sprayed and sprayed on the surface of a wide fluidized bed as shown by the arrow in FIG. Here, the swing of the charging nozzle 21 is slowly moved in one cycle for about 0.5 to 5 minutes.
Further, when the support member 34 is moved up and down via the arm 35, the inner peripheral surface of the support member 34 fitted with the charging gun 21 and the charging gun 21 are slightly rubbed in the longitudinal direction, but the rubbing is
It can be absorbed by the pin connecting part such as the link mechanism part.

Therefore, the fluidized bed incinerator becomes large,
And in the case of incineration where sludge-like substances require in-layer reaction,
Especially oil sludge, tridene isocyanate (TDI)
When it is easy to burn out of the layer, such as waste liquid, it is necessary to uniformly disperse it over a wide layer area with a single feeding device.
By combining the movement of the tip end portion of the charging gun 21 with the movement in the vertical direction and the movement in the horizontal direction, sludge-like combustion products can be evenly distributed to the layer surface. Therefore, as compared with the conventional combustor input device using a rotary chute, in the case of a square furnace, sludge-like combustibles can be more evenly distributed to the corners with respect to the fluidized bed surface. The temperature distribution of the fluidized bed can be made more uniform, and the fluidized bed can be effectively used widely and uniformly.

Further, since the charging gun 21 is installed at the lower part of the freeboard, unlike the conventional case, the charging material is not scattered and scattered in the dropping process from the charging nozzle 21, and is evaporated and volatilized. Even in the case of intense incineration, the combustion ratio in the fluidized bed is improved compared to the conventional case, the temperature in the fluidized bed rises well, and the inflammable part of the incinerated material is dried in the fluidized bed. Can burn to the end.

Further, in general, the furnace pressure is −several tens of mmAq.
Since it operates at a considerably low temperature, its sealing performance is important, but Teflon is used for the half spherical seat 32 of the spherical bearing 31 of the charging gun 21, and grease is added to maintain sufficient sealing performance inside the furnace. In addition, the tip end of the charging gun 21 is sufficiently durable against swinging. In addition, the spherical seat 31 is divided into two parts, and the injection gun 21 comes out together with the spherical ball 28.
Since 28 can also be separated in two, the input gun 21 can be inserted and removed, and can be easily disassembled and replaced.

The drive unit of this embodiment moves the support member 34 up and down from the motor 37 via the link mechanism, and at the same time, rotates the support member 34 from the motor 42 via the link mechanism.
Although the tip end portion of the charging gun 21 is swung in the vertical direction and the horizontal direction by swinging 38 to rotate the charging gun 21 by a predetermined angle, the present invention is not limited to this structure and is indicated by an arrow in FIG. As long as it is a locus, any drive device may be used as long as the sludge-like incineration material is uniformly sprayed on a wide fluidized bed surface.

[0017]

As described above, according to the present invention, even in the case of a substance such as sludge that needs to be thermally decomposed in the fluidized bed and is easily volatilized and easily escapes to the fluidized bed surface. In comparison with this, since the combustion products are more evenly distributed to the corners, the temperature distribution on the surface of the fluidized bed can be improved, and since the charging gun main body is installed at the lower part of the freeboard, the charging process falls. Therefore, the combustion ratio in the layer can be improved without being scattered and scattered so much. Therefore, the temperature in the fluidized bed is uniform and a wide fluidized bed can be efficiently used.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of an incinerator loading device in a fluidized bed incinerator according to an embodiment of the present invention.

FIG. 2 is a front view showing a rotation drive device of a charging gun in the incineration material charging device of FIG.

FIG. 3 is a fluidized bed surface view showing a locus in which incinerated matter is sprayed by the incinerator throwing apparatus of FIG.

FIG. 4A is a vertical cross-sectional view showing the configuration of a conventional fluidized bed incinerator, and b is a plan view of the conventional fluidized bed incinerator.

[Explanation of symbols]

 21 Input gun 22 Tip part 23 Combustion material supply device 28 Spherical ball 29 Fire-resistant outer wall 31 Spherical bearing 32 Half spherical seat 34 Support member 35, 36, 39, 40 Arm 37, 42 Motor 38 Rotation support member 41 Bracket

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Sano 5-3, Nishikujo 5-chome, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Seiichi Nakai 5-chome Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture No. 28 in Hitachi Shipbuilding Co., Ltd.

Claims (1)

[Claims] 1. A cylindrical charging gun body having a curved tip end portion arranged inside a furnace and a base end portion arranged outside the furnace, and a cylindrical charging gun body mounted in the middle of the cylindrical portion of the charging gun body. A spherical body, a spherical bearing installed in the furnace wall below the freeboard and receiving the spherical body, and a base end portion of the charging gun body is vertically swung with the spherical body as a fulcrum, and the spherical body is An incinerator input device for a fluidized bed incinerator, comprising: a drive device that receives the spherical bearing to rotate the input gun body; and an incinerator supply device that supplies incinerated material into a tubular portion of the input gun body.