JP3119133B2 - Incinerator incinerator supply nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator for supplying incinerators such as sludge, coffee cake, tea cake, beer wheat cake, etc., to incinerators such as fluidized bed incinerators and incinerator boilers. The present invention relates to an incinerator supply nozzle of a furnace.

[0002]

2. Description of the Related Art Conventionally, when sludge as incineration, for example, is burned and incinerated in, for example, a fluidized bed incinerator as an incinerator, the incineration material discharge port at the tip of the incineration material supply passage faces the combustion chamber of the incinerator. To the attached incineration material supply nozzle, the sludge stored in the hopper is pumped through a transport pipe by a sludge supply machine such as a screw pump or a screw feeder,
The incinerator supply nozzle ejects pressurized dispersing steam (steam) from a large number of incinerator dispersion fluid outlets provided around the incinerator discharge port at the tip of the incinerator discharge nozzle. Is dispersed and supplied to a high-temperature fluidized fluidized bed of the fluidized-bed incinerator to burn and incinerate the sludge.

[0003]

However, the combustion chamber of a fluidized bed incinerator for burning and burning incineration materials such as sludge has a high temperature atmosphere (for example, 750 to 800 ° C.). ), The sludge is baked at the incinerated material discharge port at the tip of the supply nozzle due to the radiant heat or the like, and adheres to the incinerated material discharge port. Therefore, the supply amount is reduced, and the incinerator can operate stably. Disappears. The baking of this sludge becomes more remarkable in the sludge having a higher calorific value.

The present invention has been made in view of the problem of the incinerated material supply nozzle of the conventional incinerator as described above, and is intended to prevent the incinerated material such as sludge at the incinerated material discharge port from burning or sticking or burning. An object of the present invention is to provide an incinerator supply nozzle for an incinerator that can be peeled and removed to prevent a decrease in an incinerator supply amount and to operate the incinerator stably.

[0005]

In order to achieve the above object, an incinerator supply nozzle of an incinerator according to the present invention comprises:

(1) An incinerator supply nozzle of an incinerator having an incinerator supply passage extending in a cylindrical shape in the axial direction, and having an incinerator discharge port at an end facing the combustion chamber of the incinerator. In the incineration material supply passage near the incineration material discharge port at the tip of the incineration material supply nozzle, the incineration material supply passage has a required width in the axial direction of the passage, is rotatable around the axis of the passage, and movable in the axial direction, provided the scraper for fixation target peeling fixed to the inner surface of the passage, said scraper, said incineration
When the product nozzle is in operation, its tip moves back a predetermined distance from the discharge port.
And perform rotation from the retracted position when performing the peeling action.
While moving, it advances toward the discharge port of the passage, and the peeling action
When it is completed, it will return to the retracted position while rotating
To the back of the incineration material supply passage.
At least two at intervals in the direction, and the two
A sharp edge is formed at each tip of the rapper,
The tops forming the acute angle of
It is formed at the position of the lag side and the advance side, and the top of the acute angle blade is
The incinerator supply passage was provided so as to be located close to the inner surface thereof .

With this configuration, even if the incinerated material such as sludge is burned, burned, or adhered to the inner surface of the incinerated material discharge port of the incinerated material supply passage, etc.
By rotating the scraper, the scraper can be peeled off and removed, preventing a decrease in the amount of incinerated material supplied, and stably operating the incinerator.

[0008]

[0009] Then, during normal operation it is possible to keep is positioned to retract the scraper from incinerated discharge port at the tip of the supply nozzle a predetermined distance rearward, and reduce the influence of high temperature atmosphere and radiant heat scraper This prevents burning of the incinerator itself and scorching or sticking of the incinerated material to the scraper itself.In addition, the incinerated material is seized or fixed near the incinerated material discharge port at the tip of the supply nozzle, and the amount of incinerated material supplied is When the scraper is lowered, the scraper can be moved from the retracted position to the incinerated matter discharge port position at the tip while rotating, so that the seizure and the adhered matter can be surely removed.

Further, during operation of the incinerator, the scraper can be retracted and positioned a predetermined distance backward from the incinerated material discharge port at the tip of the supply nozzle, so that the incinerator can be positioned near the incinerated material discharge port of the supply nozzle. There are no obstacles that may hinder the transfer of the incinerated material, and the incinerated material is smoothly discharged from the incinerated material discharge port.

[0011]

Further, when the structure in this way, along with enable more reliably peeling action of adhering matter because the tip of the scraper sharp blade is formed, at least it is rotated in either direction of rotation scraper 2 It is possible to peel off the fixed matter at the top of the acute angle blade of one of the scrapers, so that the operation of peeling off the fixed matter can be easily performed.

In addition to the above-mentioned effects, a scraper is attached to the tip of a screw shaft, for example, which is screwed to a fixed portion of the supply nozzle body, and the scraper is fed by a so-called feed screw system. When the scraper is provided so as to be movable in the axial direction of the passage, the scraper can be moved in the axial direction of the incineration material supply passage by rotating the screw shaft, so that the scraper can be moved in the retracted position. The scraper can be rotated to the right and advanced toward the incineration material discharge port at the tip so that the scraping operation of one of the scrapers can be performed, and then the scraper is rotated to the left in the opposite direction. While returning the scraper to the retracted position, it is possible to peel off the adhered matter with the sharp-edged blade at the tip of the other scraper. Will be peeling operation around is performed, exfoliation of adhering matter is reliably performed.

[0014]

FIG. 1 is a longitudinal sectional view of an incinerated material supply nozzle according to an embodiment of the present invention, and FIG. 2 is a front view taken along line II of FIG. FIG. 3 is an enlarged longitudinal sectional view of the vicinity of the incinerated material discharge port at the tip of the incinerated material supply nozzle in FIG. 1, and FIG. 4 is a front view taken along the line IV in FIG. It is the figure which looked at the thing discharge mouth from the shaft end.

In FIG. 1, reference numeral 10 denotes a fluidized bed incinerator as an incinerator, 11 denotes its furnace wall, 11a denotes a refractory, 1
1b is a cooling pipe constituting a water cooling wall, 12 is a combustion chamber (in a furnace), and 13 is a fluidized bed formed therein. On the furnace wall 11 of the combustion chamber 12 of the fluidized bed incinerator 10, a cylindrical supply nozzle mounting tube 14 having a flange 14a at the tip is inclined at a predetermined angle (θ) so as to penetrate the furnace wall 11 and lower the furnace side. The sludge supply nozzle 20 serving as an incineration material supply nozzle for supplying sludge, which is an incineration material, to the mounting cylinder 14 is inclined at the same angle (θ) as the mounting cylinder 14 and the tip of the incineration material. A sludge discharge port 41 as a discharge port faces the combustion chamber 12 of the incinerator 10 and has a flange 23a.
Is attached to the combustion chamber 12 of the incinerator 10 by being joined to the flange 14 a of the mounting seat 14.

The sludge supply nozzle 20 has a cylindrical body 21 as a nozzle body formed to extend in the axial direction by a predetermined distance and formed therein with a sludge supply passage 40 as an incineration supply passage. The cylindrical body 21 is roughly divided at its middle part and is integrally joined by flanges 21a and 21b. The opening on the furnace side of the cylindrical body 21 is a sludge discharge port 4.
It becomes 1. The end of the cylindrical body 21 on the anti-sludge discharge port side (the handle 32 side) is sealed with a bearing boss 22b.
A sludge supply pipe 27 as an incineration supply pipe having a flange attached to the upper end thereof is connected and attached to the middle of the cylinder body 21 on the side opposite to the sludge discharge port so as to be inclined in the flow direction of the passage of the cylinder body 21. I have.

A space 26a is formed around the sludge discharge port 41 side of the cylinder 21 between the cylinder 21 and the cylinder 21 to supply a pressurized fluid such as pressurized steam or compressed air for dispersing sludge. A cylindrical jacket 23 is attached.
As shown in detail in FIG. 4, a number of pressurized fluid jets 25 are provided at equal intervals in the circumferential direction between the furnace-side end of No. 3 and the tip forming the sludge discharge port 41 of the cylindrical body 21. Conical member 2 provided
4 sealed. A pressurized fluid supply pipe 26 is attached to the jacket 23. The pressurized fluid supply pipe 26 is shown in FIG. 1 as extending downward, but is shown as being rotated by 90 ° for explanation. Actually, it extends horizontally as shown in FIG. Installed. A flange 23 a that is joined to the flange 14 a of the supply nozzle mounting cylinder 14 is attached to an outer peripheral portion of the jacket 23.

Thus, a scraper shaft 30 extending in the axial direction of the cylindrical body 21 with its axis aligned with the cylindrical body 21 is formed through the inside of the cylindrical body 21 forming the sludge supply passage 40. The scraper shaft 30 is provided so as to be rotatable around its axis. That is, the scraper shaft 30 is provided with a bearing boss 22 fixed to the end of the cylindrical body 21 on the side opposite to the sludge discharge port.
b and a female screw threaded at the bent portion 28a of a bracket 28 which is integrally attached to the bearing boss 22b and has a tip portion bent downward to be rotatable. It is provided in.

A male screw having a predetermined length is screwed in the axial direction on the outer periphery of the shaft portion 30a near the end of the scraper shaft 30 on the side opposite to the anti-sludge discharge port. The female screw of the bent portion 28a is screwed, and a handle 32 for rotating the scraper shaft 30 is attached to the end of the scraper shaft 30 at a position outside the bent portion 28a of the bracket 28. Have been. A gland packing 33 is interposed between the bearing boss 22 b and the outer peripheral portion of the scraper shaft 30, and the gland packing 33 is pressed by a gland presser 34.

On the other hand, at the end of the scraper shaft 30 on the side of the sludge discharge port, as shown in detail in FIG.
The scraper 31 having a required width in the axial direction of the scraper shaft 30, that is, the scraper shaft 30 has a required width in the circumferential direction 1.
Two scrapers are attached at 80-degree symmetrical positions, and each of the scrapers 31 has an acute-angled blade 31a formed at a tip end thereof. As shown in FIG. 4 in detail, the apex portions 31b of the two scrapers 31 which form the acute angle of the acute angle blades 31a are formed at positions on the side lagging and the side advancing with respect to the same rotation direction, respectively. The top 31b of the blade 31a is located close to the inner surface of the sludge supply passage 40.

Accordingly, by rotating the handle 32, the scraper 31 can be rotated around the axis of the sludge supply passage 40 via the scraper shaft 30, and can be moved in the axial direction of the sludge supply passage 40. it can. In the state of FIG. 1, the scraper 31 is positioned closest to the sludge discharge port 41 of the sludge supply passage 40 (the scraper 31).
In this state, the handle 32 is viewed from its outer shaft end, that is, when the handle 32 is rotated counterclockwise in the state shown in FIG. 2, the male screw of the scraper shaft 30 is shown. Due to the screwing action of the screw and the female screw of the bent portion 28a of the bracket 28, the scraper 31 retreats to the anti-sludge discharge port 41 side with a predetermined stroke S at the position shown by the chain line in FIG. The tip of the scraper shaft 30 can be moved to the O position.

The sludge supply nozzle 20 constructed as described above
The operation of will be described. During operation of the fluidized bed incinerator 10, high temperature fluidization and combustion air is blown up from an air distribution plate located below the combustion chamber 12 in the combustion chamber 12, and fluidized medium such as sand is fluidized to form a fluidized bed 13. The temperature of the fluidized bed 13 and the temperature of the freeboard facing the discharge port at the tip of the supply nozzle 20 above the fluidized bed 13 are maintained at a predetermined high temperature of 750 to 800 ° C. The sludge as incineration material is dispersed and supplied to the free board from the sludge supply nozzle 20, and then the fluidized bed 1
3 and incinerated.

During the operation of the sludge supply nozzle 20, the tip of the scraper 31 is normally set at a position (O) retracted from the discharge port 41 by a predetermined distance S, for example, 100 mm, as shown by a chain line in FIG. The sludge stored in the hopper is fed to the sludge supply pipe 27 of the sludge supply nozzle 20 by a sludge supply pump such as a screw pump or a screw feeder through a transport pipe. It is pressure-fed and supplied to an annular sludge supply passage 40 therebetween and discharged from a discharge port 41 at the tip thereof. At this time, the dispersion steam (steam) as the pressurized fluid is supplied into the jacket 23 via the pressurized fluid supply pipe 26, and a number of pressurized fluid jets provided around the sludge discharge port 41. The steam is spouted vigorously from 25 and the sludge discharged from the sludge discharge port 41 is dispersed and
Into the hot fluidized bed 13 for dispersion and combustion
Be incinerated.

During the sludge incineration operation, the tip of the scraper 31 or the scraper shaft 30 is retracted backward by a predetermined distance (S) from the position (C) of the sludge discharge port 41 at the tip of the sludge supply nozzle 20. Therefore, there is no obstacle in the vicinity of the sludge discharge port 41 of the sludge supply nozzle 20 that may hinder the transfer of incinerated sludge, and the sludge is discharged smoothly from the sludge discharge port 41. In addition, combustion chamber 1
2, the effects of the high-temperature atmosphere and the radiant heat are reduced, and the burning of the scraper 31 itself and the scorching or sticking of the incinerated material to the scraper 31 itself are effectively prevented.

During the sludge incineration operation by such an incinerator, the sludge discharge port 4 of the sludge supply nozzle 20 is operated.
If the sludge seizes or adheres to the inner surface of the sludge supply passage 40 near 1, the supply amount of the sludge decreases. At this time, when the handle 32 of the scraper shaft 30 is viewed from its outer shaft end, that is, by rotating the handle 32 clockwise as shown in FIG. 2, the two scrapers attached at the circumferentially symmetric positions via the scraper shaft 30 are formed. The sludge discharge port 4 of the sludge supply nozzle 20 is rotated from the retracted position (O) while rotating the 31, 31 clockwise.
When the sludge is moved forward by the stroke S, the sediment of the sludge and the adhered matter are removed and removed.

At this time, of the two scrapers 31, 31, the scraper 31, which is located on the upper side shown in FIG. 4, that is, in FIG. 4, the scrapers 31, 31 rotate to the left. On the other hand, the top part 31b of the acute angle blade 31a of the upper scraper 31, which is located on the side where the top part 31b forming the acute angle of the acute angle blade 31a advances, more effectively performs the burning of the sludge and the detachment of the adhered matter.

When the peeling operation is completed, the handle 32 of the scraper shaft 30 is viewed from the outer shaft end thereof, that is, by rotating the handle 32 counterclockwise in the state shown in FIG. When the two scrapers 31, 31 attached to the position are rotated counterclockwise from the forward position (C) toward the anti-sludge discharge port 41 side of the sludge supply nozzle 20 by a stroke S while rotating the two scrapers 31, 31 leftward, During this time, the seizure and the adhered matter of the sludge remaining at the time of the forward movement are peeled off and removed.

At this time, of the two scrapers 31, 31, the lower scraper 31 shown in FIG. 4, that is, in FIG. 4, the scrapers 31, 31 rotate rightward, so that The top portion 31b of the acute angle blade 31a of the lower scraper 31, which is located on the side where the apex portion 31b forming the acute angle of the acute angle blade 31a advances, more effectively performs the seizure and the detachment of the adhered matter.

As described above, when the scrapers 31, 31 advance and retreat, the rotation of the scrapers 31, 31 and the movement in the axial direction (stroke S) ensure that the sediment of the sludge and the adhered matter are effectively peeled off. Removed. In this example, the incinerated sludge had a water content of about 85% and a heating value of 5,30.
It is a sludge with a high water content of 0 Kcal / Kg, a high calorific value, and a viscous sludge.Baking of the sludge is particularly remarkable as the calorific value increases, but the baking is effectively and reliably removed by such an action. You. Such peeling operation by rotating the handle can be performed even during operation of the incinerator. Further, if such a stripping operation is periodically performed during the operation, it is more effective for the stable incineration operation of the incinerator. As described above, by moving the scraper 31 by the stroke S, the sludge remaining and adhering to the sludge supply passage 40 during that time can also be removed.

In the above-described embodiment, the handle 32 is rotated to rotate the scrapers 31 and 31 and move in the axial direction.
A rotation drive source such as a small electric motor or a hydraulic motor may be attached to the end of the scraper to automatically and periodically rotate the scrapers 31 and 31 and move in the axial direction.

[0031]

In this structure, as shown in FIG. 4, two scrapers are attached to each other to form acute-angled blades 31a at the tips of the scrapers 31, 31, respectively.
If the apex portions 31b forming the acute angle a are formed on the lagging side and the advancing side, respectively, with respect to the same rotation direction, the adhered material can be more reliably peeled off and the scrapers 31, 31 can be formed.
No matter which rotation direction is rotated, the fixed matter can be peeled off at the top of the acute angle blade of one of the two scrapers, and the peeling operation of the fixed matter can be easily performed.

In the above embodiment, the scraper 3
1 and 31 show the case where two pieces are provided in the circumferential direction. However, three or more pieces may be provided, or only one piece may be attached in some cases. This may be selected according to the properties of the incinerated material and the difference in the state of fixation.

Although the shape of the blade at the tip of the scraper 31 is an acute angle blade, the shape of the blade is also the shape of the sludge discharge port 41 of the sludge supply nozzle 20 as viewed from outside the sludge discharge port 41, so-called, The shape corresponding to FIG. 4 can be selected from a variety of shapes such as, for example, a shape having a flat (flat) tip or a shape having a sharp center at the tip. It can be determined according to the situation.

In the above embodiment, the case where the incinerated material is sludge is shown. However, as the incinerated material applied to the present invention, high-water content waste such as coffee cake, tea cake, beer wheat cake, etc.
Alternatively, it is needless to say that incinerated materials or the like obtained by mixing them with sludge may be used.

[0036]

As is clear from the above description, the present invention has the following excellent effects.

According to the first aspect of the present invention, the scraper is rotated even if the incineration material such as sludge is scorched, burns, or adheres to the inner surface of the incineration material discharge port portion of the incineration material supply passage. Thus, the incinerator can be peeled and removed, a decrease in the amount of incinerated material supplied can be prevented, and the incinerator can be operated stably.

[0038] Then, during normal operation it is possible to keep is positioned to retract the scraper from incinerated discharge port at the tip of the supply nozzle a predetermined distance rearward, and reduce the influence of high temperature atmosphere and radiant heat scraper It is possible to prevent burning and sticking of the incinerated material to the scraper itself and the scraper itself. Further, when the incinerated material is seized or fixed near the incinerated material discharge port at the tip of the supply nozzle and the supply amount of the incinerated material is reduced, the scraper is rotated from the retracted position to the incinerated material discharge port position at the tip. The seizure and the adhered matter can be surely removed because they can be moved while moving.

Further, during operation of the incinerator, the scraper can be retracted and positioned a predetermined distance backward from the incinerated material discharge port at the tip of the supply nozzle. There is no obstruction that may hinder the transfer of the incinerated material, and the incinerated material can be smoothly discharged from the incinerated material discharge port.

[0040] Then, the scraper it is possible to carry out more reliably the exfoliation of attached material because sharp blade is formed on the tip portion, scraper any rotational direction be rotated at least two scrapers Since the adhered matter can be peeled off at the top of the acute angle blade of one of the scrapers, the operation of peeling the adhered matter can be easily performed.

In addition to the above-mentioned functions and effects, a scraper is attached to, for example, a tip end of a screw shaft which is screwed and attached to a fixing portion of a supply nozzle body, and the scraper is supplied by a so-called feed screw method. If the scraper is provided so as to be movable in the axial direction of the passage, the screw shaft can be rotated to move the scraper in the axial direction of the incinerated material supply passage while rotating the scraper. In this state, the scraper can be rotated to the right to move forward toward the incineration material discharge port at the tip so that the scraping operation of one of the scrapers can be performed, and then the scraper is turned to the left in the opposite direction. It is possible to remove the adhered material with the acute angle blade at the tip of the other scraper while rotating the scraper to the retracted position. It is possible to perform the peeling operation in the vicinity of the object discharge port portion, the peeling action of the adhering matter can be more surely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a sludge supply nozzle according to an embodiment of the present invention.

FIG. 2 is a front view taken along line II of FIG. 1 and is a view as seen from an end surface on a handle side in an axial direction of a supply nozzle.

FIG. 3 is an enlarged vertical sectional view of the vicinity of an incinerated material discharge port at the tip of the sludge supply nozzle of FIG.

4 is a front view of the sludge supply nozzle as viewed from the direction of the arrow IV in FIG. 3, and is a view of the sludge discharge port at the tip of the sludge supply nozzle as viewed from the shaft end.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 fluidized bed incinerator 12 combustion chamber 13 fluidized bed 14 incineration material supply nozzle mounting seat 20 sludge (incineration material) supply nozzle 21 cylindrical body (supply nozzle body) 23 jacket 25 steam (pressurized fluid) jet port 26 steam (pressurized) Fluid) supply pipe 27 sludge (incineration) supply pipe 30 scraper shaft 30a male screw forming section 31 scraper 31a acute angle blade 31b top of acute angle blade 32 handle 40 sludge (incineration) supply passage 41 sludge (incineration) discharge port S scraper Travel distance (stroke) C Tip position of scraper advance limit O Tip position of scraper retract limit

Claims (1)

(57) [Claims] 1. An incinerator supply nozzle for an incinerator having an incinerator supply passage extending axially in a cylindrical shape and having an incineration discharge outlet at a leading end facing a combustion chamber of the incinerator. Inside the incineration material supply passage near the incineration material discharge port at the tip of the incineration material supply nozzle, has a required width in the axial direction of the passage, is rotatable around the axis of the passage, and An axially movable scraper for removing the adhered matter fixed to the inner surface of the passage is provided .
While the spill is operating, its tip retracts a predetermined distance from the discharge port.
Position and rotate from the retracted position when performing the peeling action.
While moving forward toward the discharge port of the passage, the peeling action ends
Then, rotate to the retracted position while rotating in the reverse direction of the forward movement.
And retreat, and in the circumferential direction of the incineration material supply passage.
At least two at intervals, and the two scrapes
A sharp edge is formed at each of the tips of the blades.
Tops forming corners are delayed with respect to the same rotation direction
And the top of the sharp edged blade is
An incineration material supply nozzle for an incinerator, wherein the nozzle is provided so as to be located close to an inner surface of a material supply passage .