JPH05288331A - Dust preventing device for incinerator - Google Patents

Abstract

PURPOSE:To improve a dust removing efficiency by a method wherein an inner circumferential surface of an upper cylinder of a gas circulating vane for guiding ascending combustion discharging gas and circulating it is provided with a dust preventing flap circulated along the inner circumferential surface. CONSTITUTION:A vertical cylinder 31 having a small diameter and having an upper conical shape is fixed at an inner center part of a lower part of a vertical cylinder 30. A gas circulating vane 43 is fixed between the vertical cylinder 31 and an inner circumferential surface 38 of the vertical cylinder 30. Two spaced apart dust preventing flaps 32 and 33 are arranged at a circumferential wall of the vertical cylinder 30 at the desired upper position of the vertical cylinder 31, with a vertical spacing being left. The dust preventing flaps 32, 33 are set such that a part of explosion smoke A accumulated and ascended along the inner circumferential surface 38 from below the vertical cylinder 30 is taken out of the vertical cylinder 30 in such a manner as like that a surface skin of a tree is peeled off. With such an arrangement, a high dust preventing efficiency can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover for an incinerator.

[0002]

2. Description of the Related Art Conventionally, an incinerator surrounded by a furnace wall, a cyclone type dust remover connected to the incinerator chamber through a smoke exhaust pipe, and a soot containing a large amount of soot sorted by the cyclone type dust remover Incinerators with multi cyclones for treating wind are known.

[0003]

Since the known cyclone type dust removing device has a low dust removing efficiency for one time, it cannot meet the predetermined environmental standard unless the dust removing work is repeated several times. ..

[0004]

Therefore, the present invention comprises an incinerator chamber 14 and a cyclone type dust remover 6 connected to the incinerator chamber 14 through a smoke exhaust pipe 5.
In the lower part of the vertical cylinder 30 of the cyclone type dust removing device 6, gas swirl vanes 4 for guiding and swirling rising combustion exhaust gas.
3 is fixed, and the dust removing flap 32 for scraping off the soot A that swirls and accumulates along the inner circumferential surface 38 is provided on the inner circumferential surface 38 of the vertical cylinder 30 above the gas swirling blade 43. On the inner peripheral surface 38 of the vertical cylinder 30 where the dust removing device and the dust removing flap 32 are provided, a double-stripe spiral blade 37 that guides the soot A is formed, and the dust removing flap 32 is the spiral blade 37. The dust removing device of the incinerator having a width corresponding to the number of lines, and the dust removing device of the incinerator having another dust removing flap 33 provided above the dust removing flap 32, and
An air blower 8 capable of supplying swirling air into the vertical cylinder 30 between the upper and lower dust removing flaps 32 and 33.
Removing device of an incinerator connected to a blower pipe 42 from the above, and the dust removing flap 32 and the dust removing flap 33.
Is connected to a multi cyclone 7, and the dust-exhausted air discharged from the multi cyclone 7 is sucked by a blower 8.
The wind sucked by the air blower 8 has a structure of a dust remover of an incinerator configured to return to the vertical cylinder 30 after the flow velocity is increased via a blower flap 41 provided on the vertical cylinder 30.

[0005]

An embodiment of the present invention will be described with reference to the drawings.
1 is an incinerator for municipal waste, 2 is an incinerator 1 and a blower pipe 3
An air blower for blowing combustion air through the air source 4, a secondary combustion chamber connected to the incinerator 1 via a smoke exhaust pipe 5, a cyclone type dust remover, and a cyclone type dust remover 6 The multi cyclone 8 is an air blower sucked by the multi cyclone 7 and returned to the cyclone type dust remover 6.

FIG. 2 is a sectional view of the incineration apparatus 1 taken along the line XX, and FIG. 3 is a sectional view of the incineration apparatus 1 taken along the line YY.
Is the outermost peripheral wall 9 and the inner wall of the double walled furnace wall 1
No. 0, and the air passage chamber 11 is formed with a space between the peripheral wall 9 and the furnace wall 10. The air duct chambers 11 are formed in the periphery and the bottom portion of the incinerator 1 except for the ceiling portion, and are divided into a plurality of upper and lower parts by a plurality of horizontal partition plates 12. Each of the upper and lower air passage chambers 11 has a respective air passage chamber 11. The blower pipe 3 of the independent blower device 2 is connected. The blower pipe 3 is provided with an air volume control valve 13 capable of independently adjusting the air volume, and each air duct chamber 11
Configure so that you can blow the air to your heart's content.

The inside surrounded by the furnace wall 10 becomes an incinerator chamber 14, and the combustion air in the air duct chamber 11 is introduced into the incinerator chamber 14 through a large number of air-blowing nozzles 15 penetrating the furnace wall 10. Supply. Therefore, when the air flow control valve 13 adjusts the air supply amount to each air passage chamber 11 divided into upper and lower parts by the plurality of horizontal partition plates 12, the necessary amount of air is supplied to the necessary place of the incinerator chamber 14. You can The air volume control valve 13 is adjusted manually by looking through the hole formed in the wall of the incineration chamber 14 and visually observing the height of the input waste. A publicly known sensor may be provided so that the height of the input waste can be known and automatically adjusted.

Reference numeral 16 denotes an inner wall of the furnace wall 10 having a double wall structure, 17
Is an outer wall of the furnace wall 10 having a double wall structure, and a gap is formed between the inner wall 16 and the outer wall 17 so that the cooling water 18 can be injected. The clearance has the same width at the periphery and at the bottom, but the ceiling is formed in a large tank shape, and the steam discharge port 19 is formed at the upper center of the tank. In addition, since the blower nozzles 15 are provided innumerably at regular intervals in the vertical and horizontal directions and are welded to the inner wall 16 and the outer wall 17, respectively, they also serve as a strength member.

The bottom wall 20 of the incineration chamber 14 may be formed horizontally, but in the state of FIG. 3 of the present embodiment, a deep gradient is provided on the back side so that the bottom wall 20 is melted in a part of the back. A reservoir 21 for accumulating the resin is formed. 22 is the reservoir 21
It is an auxiliary burner that burns the resins stored in. Two
Reference numeral 3 is a refractory layer made of a brick-like material provided in the pool 21. Reference numeral 24 is an inlet for incineration waste, which is provided on the front side in FIG. As shown in FIG. 2, the waste injecting port 24 for incineration has a large opening so that a small transport vehicle T can throw in dust, and the incinerator is extremely large as can be seen in comparison with the transport vehicle T.

Reference numeral 25 denotes an opening / closing door of the input port 24, which is a large opening / closing door and is automatically opened / closed. 26 is the incineration chamber 14
From the secondary combustion chamber 4 to 27, 27 is the incineration chamber 14
The reference numeral 28 denotes an ash removal port formed at 2, and 28 denotes an automatic opening / closing door provided at the ash removal port 27. It should be noted that the air duct chamber 1 divided into upper and lower
1, the blower nozzle 15 provided in the lowermost air duct chamber 11
Is vertical, the ash falls through the blower nozzle 15 and accumulates in the lowermost air duct chamber 11. However, the present invention allows the operator to enter and remove the ash inside.
It is formed to a ceiling height that allows work. 29 is an entrance to the lowermost air duct chamber 11, and K is a staircase.

FIG. 4 shows a cross section of the main part of the cyclone type dust removing device 6, in which a vertical cylinder 31 having a small diameter and a conical sharp top is attached to the inner center of the lower part of the vertical cylinder 30. Gas swirl vanes 43 are fixed between the inner peripheral surfaces 38 of the vertical cylinder 31 and the vertical cylinder 30. Two dust-removing flaps 32 and 33 are provided on the peripheral wall of the vertical cylinder 30 at a desired position above the vertical cylinder 31 at upper and lower intervals. The dust removal flap 3
Denoted at 2 and 33 are parts of the soot A that accumulates and rises from below the vertical cylinder 30 along the inner peripheral surface 38 and is taken out of the vertical cylinder 30 by peeling off the skin of the tree.
As shown in FIG. 5, the inner surface side 34 of the reference numerals 2, 33 is formed in an arc surface substantially the same as the inner peripheral surface 38 of the vertical cylinder 30. Further, the dust removing flaps 32, 33 are axially fixed on the base side by vertical rotating shafts 35, 36, and on the front side by the vertical cylinder 30 according to the thickness of the soot A.
It is configured so that it can be freely moved in and out in the radial direction of and can be adjusted in the direction of arrow a. This angle adjustment may be performed manually, but a motor (not shown) is attached to the rotary shafts 35 and 36 to automatically adjust.

A spiral blade 37 is attached to the inner peripheral surface 38 of the vertical cylinder 30. In the embodiment, the spiral blade 37 is provided at the position where the dust removing flaps 32 and 33 are provided.
It may be formed entirely. The spiral wing 37 is preferably configured as a double-stripe with about 4 threads. In the case of a four-thread spiral, the dust removal flaps 32, 33 need to be formed to have a height (width) of four threads so that the soot A accumulated in all the threads can be taken out without leakage. Although not shown, a spiral blade equivalent to the spiral blade 37 may be formed on the inner surface side 34 of the dust removing flaps 32, 33.

As shown in FIG. 1, of the dust removing flaps 32, 33, the soot A extracted by the lower dust removing flap 32.
Is supplied to the multi-cyclone 7 through the connecting pipe 39 and is taken out by the dust removing flap 33 on the upper stage.
Is supplied to the multi-cyclone 7 via a connecting pipe 40.

Dust removal flaps 32, 3 above and below the vertical cylinder 30.
A blower flap 41 is provided between the upper and lower sides of 3. The air blow pipe 42 from the air blower 8 is connected to the air blow flap 41, and the wind force of the air blower 8 is effectively used to make a vertical cylinder 30.
A strong swirl wind is formed inside. A well-known ejector (not shown) is provided at the upper position of the vertical cylinder 30.

[0015]

[Operation] Next, the operation will be described. (Operation of the incineration chamber 14) The present invention has the above-described configuration, and the opening / closing door 25 is automatically opened to feed the general waste into the incineration chamber 14 from the loading port 24 by the transport vehicle T. After throwing in the dust,
When ignited by the auxiliary burner 22 or other desired means and blown from the blower device 2 through the blower pipe 3, the incineration chamber 14
Except for the ceiling part inside, the other parts are provided with innumerable blast nozzles 15 vertically and horizontally, so that the blast is complete and burns well, and between the double-walled furnace wall 10 of the incinerator 14, Since the cooling water 18 is injected, overheating is not performed.

As combustion progresses, ash is gradually stored in the incineration chamber 14 and subsequent wastes are thrown in one after another, which changes the situation. However, in the present invention, the air duct chamber 11 of the incineration chamber 14 is changed. As described above, the plurality of horizontal partition plates 12 divide the space into upper and lower parts, and the air flow rate (air pressure) to each of the divided air passage chambers 11 can be appropriately adjusted by the air flow rate adjusting valve 13. Even if 15 is blocked by deposits, sufficient air necessary for combustion can be blown against this to blow it to the required locations for good combustion.

(Operation of the vertical cylinder 30) However, the combustion exhaust gas passes from the communication port 26 through the smoke exhaust pipe 5 to the secondary combustion chamber 4
After being subjected to secondary combustion, it is sent to the vertical cylinder 30 of the cyclone type dust removing device 6. The exhaust gas that has flowed into the vertical cylinder 30 has a well-known ejector provided on the upper portion of the vertical cylinder 30,
In addition to the swirling action by the gas swirling blades 43 provided in the lower portion of the vertical cylinder 30, the air is blown at a high flow rate from the air blower 8 via the air blow flaps 41 to swirl strongly and have a high specific gravity. The soot A is the inner peripheral surface 3 of the vertical cylinder 30.
The soot A that has swirled and accumulated along 8 and is accumulated is guided by the multi-row (four rows in the embodiment) spiral blade 37 and rises.

The soot A guided by the spiral blade 37 is removed by the dust removing flap 32 on the lower stage of the vertical cylinder 30.
The tree is stripped off and sent to the multi-cyclone 7 via the connecting pipe 39. It should be noted that the dust removal flap 32 is formed so that the vertical height thereof corresponds to the width of the four spiral blades 37 when the number of the spiral blades 37 is four, so that the soot A is not left behind. In addition, the spiral wing 37 is provided on the inner peripheral surface 38.
Since the soot A is swirled and accumulated along the inner peripheral surface 38, the soot A is always subjected to the dust removing action by the dust removing flap and does not jump over the dust removing flap and rise. In other words, due to the centrifugal force of the swirling wind, the heavy soot A having a specific gravity is accumulated on the inner peripheral surface 38 of the vertical cylinder 30, and the accumulated soot A always enters between the threads of one of the spiral blades 37. Then, the dust removing flap 32 removes the dust. Therefore, only a part of the soot A that could not be separated by gravity due to the centrifugal force passes upward without being affected by the dust removal flap 32.

Thus, the treated air treated by the multi-cyclone 7 is circulated and blown by the blower 8 through the blower pipe 42 to the blower flap 41, and the flow velocity is increased by the flap 41 and returned to the vertical cylinder 30. Be done. The soot A that cannot be removed by the lower dust removal flap 32 is again subjected to specific gravity selection by the swirling wind, and is similarly treated by the upper dust removal flap 33.

[0020]

As described above, according to the present invention, the incineration chamber 14
And a cyclone type dust remover 6 connected to the incinerator chamber 14 through the smoke exhaust pipe 5, the rising combustion exhaust gas is guided to the lower part of the vertical cylinder 30 of the cyclone type dust remover 6. A dust removal flap for fixing the gas swirl vane 43 to be swirled, and scraping off the soot A that swirls and accumulates along the inner circumferential surface 38 of the vertical cylinder 30 above the gas swirl vane 43. Since the dust removing device of the incinerator provided with 32, the heavy soot A having specific gravity swirls and accumulates along the inner peripheral surface 38 of the vertical cylinder 30, and the accumulated soot A forms the vertical cylinder 3
The dust removing flap 32 provided at 0 effectively removes the thin skin of the tree. In addition, a double-stripe spiral blade 37 that guides the soot A is formed on the inner peripheral surface 38 of the vertical cylinder 30 where the dust flap 32 is provided, and the dust flap 32 has the number of threads of the spiral blade 37. In addition to the above effects, the soot A is swirl-collected along the inner peripheral surface 38 and the soot A is guided by the double spiral helix 37 to form the vertical cylinder 30. The dust is reliably sent to the dust-removing flap 32 provided, and is stripped off to remove the soot A from the tree. Further, since the dust removing device of the incinerator is provided with another dust removing flap 33 above the dust removing flap 32, a further dust removing effect can be expected. Further, the dust removal device of the lower stage is configured by connecting the blower pipe 42 from the blower device 8 capable of supplying swirling air into the vertical cylinder 30 between the upper and lower dust removal flaps 32 and 33. A strong turning force can be imparted again to the exhaust gas that has passed through the flap 32. In addition, the dust removal flap 32 and the dust removal flap 33.
Is connected to a multi cyclone 7, and the dust-exhausted air discharged from the multi cyclone 7 is sucked by a blower 8.
The wind sucked by the air blower 8 is connected to the multi-cyclone 7 because it is a dust remover of the incinerator configured to increase the flow velocity through the air blow flap 41 provided on the vertical cylinder 30 and then return it to the vertical cylinder 30. The force of the blower 8 can be effectively used.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram.

FIG. 2 is an XX sectional view of the incinerator.

FIG. 3 is a YY cross-sectional view of the incinerator.

FIG. 4 is a vertical cross-sectional view of a cylinder.

FIG. 5 is a cross-sectional view of a cylinder showing a dust removing flap.

FIG. 6 is a cross-sectional view of a cylinder showing a blower flap.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Incinerator, 2 ... Blower, 3 ... Blast pipe, 4 ... Secondary combustion chamber, 5 ... Smoke exhaust pipe, 6 ... Cyclone type dust remover, 7 ... Multi cyclone, 8 ... Blower, 9 ... Surrounding wall, 10 ... Furnace wall, 11 ... Air passage chamber, 12 ... Partition plate, 13 ... Air flow control valve,
14 ... Incinerator room, 15 ... Blow nozzle, 16 ... Inner wall, 17 ...
Outer wall, 18 ... Cooling water, 19 ... Steam outlet, 20 ... Bottom wall,
21 ... Reservoir part, 22 ... Auxiliary burner, 23 ... Fireproof layer, 2
4 ... Input port, 25 ... Open / close door, 26 ... Communication port, 27 ... Soot extraction port, 28 ... Open / close door, 29 ... Entrance, 30 ... Cylinder, 3
1 ... Vertical axis rotating fan, 32, 33 ... Dust removal flap, 34
... inner surface, 35, 36 ... rotary shaft, 37 ... spiral blade, 38 ... inner peripheral surface, 39, 40 ... connecting pipe, 41 ... blower flap, 42
... blower tube, 43 ... blades for swirling gas.

Claims (5)

[Claims] 1. An incinerator chamber 14, and a smoke exhaust pipe 5 in the incinerator chamber 14.
And a cyclone type dust remover 6 connected via a gas cyclone type dust remover 6 with a gas swirling vane 43 fixed to the lower portion of the vertical cylinder 30 of the cyclone type dust remover 6 for inducing and swirling the rising combustion exhaust gas. , The gas swirling blade 43
The inner peripheral surface 38 of the vertical cylinder 30 located above
Flap 3 for scraping off soot A that swirls along
Incinerator dust remover equipped with 2. 2. The dust removing flap 3 according to claim 1.
In the inner peripheral surface 38 of the vertical cylinder 30 where 2 is provided, a double-stripe spiral blade 37 for guiding the soot A is formed, and the dust removal flap 32 has a width corresponding to the number of spiral blades 37. Dust removal device for the formed incinerator. 3. The dust removing flap 3 according to claim 2.
A dust removing device for an incinerator having another dust removing flap 33 provided at a position above 2. 4. The incinerator according to claim 3, wherein a blast pipe 42 from a blast device 8 capable of supplying swirling air into the vertical cylinder 30 is connected between the upper and lower dust removing flaps 32 and 33. Dust removal device. 5. The dust removing flap 3 according to claim 3,
2 and the dust removal flap 33 have a multi-cyclone 7
And the dust-exhausted air discharged from the multi-cyclone 7 is sucked by the air blower 8, and the wind sucked by the air blower 8 has its flow velocity increased through the air blow flap 41 provided in the vertical cylinder 30. A dust remover for an incinerator configured to be returned to the vertical cylinder 30.