JP2003088719A - Dust collector and dust collection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector made small-sized itself while keeping dust collection capacity, enhanced in dust removing capacity and capable of keeping dust collection capacity, and a dust collection system using the same. SOLUTION: In the dust collector, a plurality of gas passages for connecting the lower space communicating with a gas inlet part and the upper space communicating with a gas outlet part are formed and filters are arranged above the respective gas passages in an inclined state. A bypass port allowing the upper surfaces of the filters and the lower space to communicate with each other is provided to the lower part of the partition wall demarcating the gas passages and a bypass port on-off door for opening and closing the bypass port is provided to the bypass port. Further, the dust collection system is constituted by parallelly providing the dust collectors through ducts connected to the upstream and downstream sides of dust-containing gas and a dust collector selection door for opening and closing the ducts reaching the respective dust collectors is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting device which is disposed between an incinerator and a chimney and removes dust and the like from the smoke emitted from the incinerator.

[0002]

2. Description of the Related Art As a conventional technique, for example, Japanese Patent Laid-Open No.
The dust collector disclosed in JP-A 1-17811 allows air containing dust to flow into a first dust collecting portion, and dust is caused by a plurality of porous baffle members arranged in the first dust collecting portion. Part of the air is passed through the first dust collecting portion, and the air that has passed through the first dust collecting portion is sent to the second dust collecting portion where the wire mesh plate and the filter member are arranged to collect the dust. The air that has passed through is sent to the third dust collecting portion to collect dust. In this dust device, the filter member constituting the second dust collecting portion is provided by the guide rail so as to be detachable in the lateral direction, and
The filter member is arranged so as to be inclined with respect to the air flow, and is arranged in such a manner that the inclination of the filter member is continuous without interruption (a form in which no gap is formed with respect to the air flow). Further, when the operation is stopped, since the filter member is inclined, the dust such as the collected dioxins easily falls to the first dust collecting portion.

[0003]

However, in the above-mentioned reference, since the dust adhering to the filter member falls on the first dust collecting portion, it adheres to the baffle member constituting the first dust collecting portion, There is a problem that the dust collecting capability of the first dust collecting portion is lowered, and since the inclination of the filter member is continuous without interruption, dust attached to the upper surface side of the filter member and the third dust collecting part There is a problem in that it is not possible to remove the dust that has fallen from the section side and that has adhered to the upper surface of the filter member.

When removing dust adhering to the filter member, either the operation of the dust collector itself is stopped, or the entire smoke exhaust system itself is stopped and the filter member is removed to remove dust, and cleaning is performed. Need to do.

Further, due to the increase in ventilation resistance due to the clogging of the filter member, there occurs a problem that the pressure on the upstream side of the dust collector, for example, on the incinerator side increases.

Furthermore, in the conventional dust collecting apparatus, there is a problem that the apparatus itself becomes large in size in order to improve and maintain the dust collecting ability.

Therefore, the present invention provides a dust collecting device and a dust collecting system capable of maintaining the dust collecting capability while reducing the size of the device itself, improving the dust removing performance, and maintaining the dust collecting capability. To provide.

[0008]

Therefore, according to the present invention, there is provided a casing arranged on an exhaust passage of a gas containing dust, and a gas inlet formed below the casing and connected to an inflow side of the exhaust passage. Section, a gas outlet portion formed above the casing and connected to the outflow side of the exhaust passage, a gas passage extending from the gas inlet portion to the gas outlet portion, and a collector arranged on the gas passage. In the dust collector configured to include at least a dust means, the gas flow passage extends in a vertical direction in a lower space communicating with the gas inlet portion, an upper space communicating with the gas outlet portion, and the casing. And a plurality of gas passages that are defined by a plurality of partition walls that communicate with the lower space and the upper space, and the dust collecting means is a filter that is arranged to be inclined on each gas passage. Located in. Further, it is preferable that the filter be inclined so as to face the gas inlet portion and the gas outlet portion.

Therefore, according to the present invention, a plurality of gas passages are formed to communicate between the lower space communicating with the gas inlet portion and the upper space communicating with the gas outlet portion, and the respective gas passages are inclined. Since the filters are arranged in this manner, the passage cross-sectional area can be secured by the plurality of gas passages arranged in parallel, and a large ventilation area of the filter can be secured. For this reason, the ventilation resistance of the dust collector itself can be reduced without lowering the dust collection capability, so that pressure loss of the entire exhaust system can be prevented.

Further, it is desirable that each of the filters is provided with an impact / vibration imparting means for imparting an impact or a vibration to the respective filters on the upper side surface facing the gas outlet portion. By this, shock or vibration can be given to the filter, so without removing the filter,
The dust adhering to the filter can be shaken off.

Further, a bypass opening for connecting the upper side surface of the filter and the lower space is formed in a lower portion of the partition wall, and a bypass opening opening / closing door for opening / closing the bypass opening is formed in the bypass opening. It is desirable to be provided.

Furthermore, it is preferable that the gas inlet portion is opened on the upstream side of the adjacent gas passage, and that the gas inlet portion is provided with a distribution guide for distributing the inflowing gas to another gas passage. . As a result, since the gas inlet can be formed on the gas passage side, the vertical dimension of the dust collector can be made small, and the distribution guide is provided, so that the gas is stably distributed to other gas flow paths. Is something that can be done.

Further, it is desirable that a funnel-shaped dust collecting casing is provided below the casing. With this, the dust shaken off from the filter can be efficiently collected.

Further, it is preferable that an attachment / detachment port for attaching / detaching the filter is formed on the upper part of the casing, and a lid portion for opening / closing the attachment / detachment port is provided at the attachment / detachment port. As a result, the filter can be attached to and detached from the upper part of the casing, so that dust can be prevented from leaking to the outside when the filter is removed.

Further, it is preferable to provide a control means for operating the shock / vibration applying means and controlling the bypass opening / closing door so as to open the bypass opening. Further, it is desirable to include control means for controlling the bypass opening / closing door so as to open the bypass opening when the function of the filter is significantly deteriorated. As a result, when the dust attached to the filter is shaken off by the shock / vibration applying means, the bypass port is opened, so that the dust attached to the upper surface of the filter or the dust that has jumped to the upper surface of the filter due to the impact / vibration. Since the filter can be dropped downward through the bypass port, it is possible to reliably prevent the filter from being clogged.

Further, the filter is composed of a side surface forming member formed in a mesh of a predetermined size, and silicon carbide fibers accommodated in a space defined by the side surface forming member at a predetermined density. Is desirable.

Further, the present invention provides a dust collecting system in which a plurality of the dust collecting devices described above are arranged side by side via ducts connected to the upstream side and the downstream side of the dust-containing gas. In addition, it is desirable that a dust collection device selection door that opens and closes a duct leading to each dust collection device is provided on the upstream duct of the dust collection device. As a result, the cross-sectional area of the passage can be further improved, and when a problem occurs in any of the dust collecting devices, the duct leading to the dust collecting device can be closed.

Further, in the dust collecting system, the duct leading to the dust collecting device having a lowered dust collecting function is closed by the dust collecting device selecting door, and the impact of the dust collecting device is reduced.
It is desirable to provide a control means for operating the vibration applying means and controlling the bypass opening / closing door so as to open the bypass opening. As a result, it is possible to restore the dust collecting device having a deteriorated function without stopping the dust collecting system, so that continuous operation is possible.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration diagram of a flue gas purification system 1. This flue gas purification system 1 comprises an incinerator 2 and a chimney 3
And a multi cyclone 4, a dust collector 5, a suction blower 6, electric control dampers 7, 8 and a manual damper 9, which are arranged on the exhaust gas route 11. In addition, exhaust gas route 11
An exhaust gas bypass route 12 is provided in parallel with the above and is opened and closed by an electric gate 10. 1
6 is a dust box for accommodating and discarding dust.

The multi-cyclone 4 centrifuges the dust contained in the exhaust gas while forcibly turning the sucked exhaust gas, and the dust, soot, dust and the like having a large particle size (hereinafter referred to as dust). Are removed. Further, a photocatalyst purifying device or an electrostatic purifying device can be provided instead of the multi-cyclone 4.

The dust collector 5 shown in FIGS. 2 to 4 has a casing 51, a gas inlet portion 53 formed at a lower portion of one side surface 52 of the casing 51, and the casing 5 described above.
Gas outlet part 55 formed on the upper side of the other side surface 54 of No. 1
And. The gas inlet 53 is connected to the duct on the multi-cyclone 4 side, and the gas outlet 55 is connected.
Is connected to the duct on the manual damper 9 side. Further, in the casing 51, a lower space 56 communicating with the gas inlet 53 and an upper space 57 communicating with the gas outlet 55 are defined, and further partition walls 61, 62, 63 and the casing 51 are defined. And a plurality of gas passages 58, 59, 60 that connect the lower space 56 and the upper space 57 to each other.

Further, the gas inlet portion 53 opens at one end of the adjacent gas passage 58 and the lower space 5
A distribution guide 30 for distributing the inflowing gas is provided on the 6 side. Further, below the casing 51, a dust collecting casing 64 that defines the lower space 56 and is formed in a funnel shape is provided, and the lower end of the dust collecting casing 64 is provided with a dust discharge valve 15 to It is connected to the dust box 16.

Each of the gas passages 58, 59 and 60 has a side surface forming member 71 having a mesh of a predetermined size formed therein.
And a silicon carbide fiber 72 housed at a predetermined density in a space defined by the side surface forming member 71. The side surface forming member 7
Reference numeral 1 is a metal wire mesh having a predetermined mesh.

A striker 80 is provided on the upper surface 73 side of the filter 70 as a shock / vibration applying means. This striker (ST) 80 is a motor 8
1, a rotary shaft 82 that rotates by 1, a fixed arm 83 fixed to the rotary shaft 82, a free arm 84 rotatably fixed to both ends of the fixed arm 83, and a knocker fixed to the tip of the free arm 84. 85, and the rotation of the motor 81 causes the no-car 85 to continuously strike the hitting portion 86 to strike or vibrate the filter 70.

A bypass port 90 is opened in the lower part of the partition walls 61, 62, 63 and is opened and closed by a bypass port opening / closing door (BD) 91. The bypass opening / closing door (BD) 91 is rotated by rotating the rotating shaft 92 via a drive rod 95 and a drive arm 94 driven by a cylinder 93.

An opening 20 for attaching and detaching the filter 70 is formed on the upper surface of the casing 51. This opening 20 is normally closed by a lid 21. In addition, the upper surface of the casing 51 facilitates attachment and detachment of the filter 70, and the gas outlet portion 5
It is formed to be inclined in consideration of the movement of the gas to 5.

In the dust collector 5 having the above-described structure, the dust-containing gas flowing from the gas inlet portion 53 flows into the lower space 56.
Are distributed to the gas passages 58, 59, 60 via the gas passages 58, 59, 60, and the dust is removed by passing through the filters 70 arranged in the gas passages 58, 59, 60. It flows out from 55.

When the filter 70 is clogged, the striker 80 is driven, and at the same time, the bypass port 90 is opened to shake off the dust adhering to the filter 70.

Further, as shown in FIG. 4 and FIG. 5, in the present invention, the dust collecting device 5 is connected in parallel and the dust collecting system 40 is connected.
Make up. As shown in FIG. 5, the dust collection system 40 includes a pair of ducts 42 branching from an upstream duct 41,
43 is connected to the gas inlet 53 of the dust collector 5, and the gas outlet 55 of the dust collector 5 is connected to the pair of ducts 44,
45 is connected to the downstream side duct 46 and is made to flow to the downstream side. Especially, a selection door 47 of the dust collecting device is provided at a location from the upstream side duct 41 to the pair of ducts 42 and 43. Both or either of the dust collectors 5 provided on the left and right sides can be selected. still,
Reference numeral 48 is a drive device for the selection door 47.

In the dust collecting system 40 having the above structure,
A control device (not shown) for centralized management is provided, and the striker (ST1, ST2) is controlled by this control device.
80, the bypass opening / closing doors (BD1, BD2) 91, and the selection door 47 are controlled. Hereinafter, an example of control by this control device will be described with reference to the flowcharts shown in FIGS. 6 and 7.

The control of the dust collecting system 40 is performed by, for example,
As a part of the control (main control routine) of the flue gas purifying system 1 described above, it is started from step 100 periodically by a timer interrupt or a jump command.

Then, step 110 and step 12
At 0, the degree of contamination of the filter 70 of each dust collector (first and second dust collectors) 5 is detected. In this embodiment, the degree of contamination of the filters 70 of the first and second dust collectors 5 is detected by detecting the upstream side of the dust collectors, for example, the pressure in the lower space 56 and the pressure in the upper space 57. The pressure difference (ΔPd1, ΔPd2) is detected, and step 12
At 0 and 130, this pressure difference (ΔPd1, ΔPd
It is detected by determining whether 2) is larger than a predetermined value α. In this determination, when the filter 70 is clogged, the pressure in the lower space 56 on the upstream side increases and the pressure in the upper space 57 on the downstream side decreases.
This is because the pressure difference (ΔPd1, ΔPd2) becomes larger than the predetermined value α.

When the pressure difference ΔPd1 of the first dust collecting device 5 is larger than the predetermined value α in the judgment of step 130, the routine proceeds to step 150, where the first dust collecting device 5 is closed by the selection door 47. (Selection door 1), in step 160, the striker (ST) of the first dust collector 5 (ST
1) Operate 80, open the bypass opening / closing door (BD1) of the first dust collector 5 in step 170, and restore the filter 70 of the first dust collector 5 (dust removal). , And returns to the main control routine from step 240.

If the pressure difference ΔPd1 of the first dust collector 5 is less than or equal to the predetermined value α in the determination at step 130, the routine proceeds to step 140, where the second dust collector 5 is operated.
It is determined whether or not the pressure difference ΔPd2 is larger than the predetermined value α. In this determination, if the pressure difference ΔPd2 is larger than the predetermined value α, the routine proceeds to step 180, where the second dust collecting device 5 is closed by the selection door 47 (selection door 2), and the second dust collection is carried out at step 190. The striker (ST2) 80 of the dust collector 5 is operated, and in step 200, the bypass opening / closing door (BD) of the second dust collector 5 is opened.
2) is opened to restore the filter 70 of the second dust collector 5 (dust is removed), and the process returns from step 240 to the main control routine.

Further, when the pressure difference ΔPd2 of the second dust collecting device 5 is also equal to or less than the predetermined value α in the determination of step 130, the process proceeds to step 210, and the position of the selection door 47 is set to the central position ( Both the dust collectors (first and second dust collectors) 5 can be operated as M), and the strikers (ST1, ST2) 80 are operated in step 220.
Operation is stopped, the bypass opening / closing doors (BD1, BD2) are closed in step 230, and step 240
To return to the main control routine.

As a result, the dust collecting device 5 can be maintained in a good condition without stopping the dust collecting work, and it is not necessary to stop the operation of the smoke purification system 1 so that the smoke can be smoothly discharged. It enables purification work.

Further, as the control of the bypass opening / closing door (BD), the flowchart shown in FIG. 7 shows the control capable of coping with the abnormality of the high pressure. This step 3
In the control started from 00, particularly, the high pressure Pd is detected in step 310, and in step 320, it is determined whether or not the high pressure Pd is abnormal. In this determination, when the high pressure Pd is abnormally increased due to the reason that the filter is clogged or the combustion temperature is abnormally increased, that is, when the high pressure Pd is larger than the predetermined value β,
In step 330, the bypass port 90 is opened to allow the high pressure to flow to the low pressure side (exhaust side) to prevent an abnormal increase in the high pressure, and at the same time, to step 340, the flue gas purification system 1 itself. It stops the operation.

As described above, by providing the bypass port 90 and controlling the bypass port opening / closing door 91, it is possible to remove the dust that is shaken off from the filter upper surface 72 side, and to connect the upstream side and the downstream side to each other so that the high pressure is high. It is possible to prevent abnormal pressure on the side.

[0040]

As described above, according to the present invention, a plurality of parallel gas passages are formed in the dust collector, and the filters are arranged obliquely in the respective gas passages.
Since the dust collector can be downsized, the passage resistance of the filter can be reduced and the passage area can be increased.
The dust collection efficiency can be improved.

Further, the partition wall that defines the gas passage is formed with a bypass port that connects the upper side of the filter located on the downstream side of the filter to the lower space, and a bypass port opening / closing door is provided. The dust adhering to the upper surface of the filter can be removed during the restoration work of the filter, and the upstream side and the downstream side of the filter can be bypassed, so that the pressure abnormality on the high pressure side can be dealt with.

Further, since a plurality of dust collectors are arranged in parallel to form a dust collecting system and the dust collectors can be selected, the restoration work of the filter due to the deterioration of the capacity of the dust collectors can be performed. Since it can be executed without stopping the operation of the dust collection system and / or the flue gas purification system,
Stable operation can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a flue gas purification system using a dust collector of the present invention.

FIG. 2 is a side view of the dust collector according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of the dust collector according to the embodiment of the present invention.

FIG. 4 is a front view of the dust collection system according to the embodiment of the present invention.

FIG. 5 is a schematic configuration plan view of the dust collection system according to the embodiment of the present invention.

FIG. 6 is a flowchart showing an example of control of the dust collection system according to the embodiment of the present invention.

FIG. 7 is a flowchart showing an example of control of the bypass opening / closing door according to the embodiment of the present invention.

[Explanation of symbols]

1 Smoke exhaust purification system 5 Dust collector 30 distribution guides 47 selection door 51 casing 53 Gas inlet 55 Gas outlet 56 Lower space 57 Upper space 70 filters 80 striker 90 Bypass port 91 Bypass opening / closing door

Continued front page    (72) Inventor Kazuu Aizawa             5-4-21 Nishihashimoto, Sagamihara City, Kanagawa Yama             Da Industry Co., Ltd. Sagamihara Research Institute             Inside the laboratory (72) Inventor Yoshio Kizaki             2-13-5 Higashi Nihonbashi, Chuo-ku, Tokyo Matsumaru Bi             5F Idea Design Office Co., Ltd.             Within (72) Inventor Toshikazu Shimada             9-9 Sezaki-cho, Soka-shi, Saitama F-term (reference) 4D058 JA12 JB03 JB24 KB06 MA02                       QA23 RA03 RA19 SA20

Claims (13)

[Claims] 1. A casing disposed on an exhaust passage for a gas containing dust, a gas inlet portion formed below the casing and connected to an inflow side of the exhaust passage, and formed above the casing. A dust collecting section which is composed of at least a gas outlet connected to the outflow side of the exhaust passage, a gas passage extending from the gas inlet to the gas outlet, and dust collecting means arranged on the gas passage. In the device, the gas flow passage is defined by a lower space communicating with the gas inlet portion, an upper space communicating with the gas outlet portion, and a plurality of partition walls extending in the vertical direction in the casing, A dust collecting device comprising: a plurality of gas passages communicating with the lower space and the upper space, wherein the dust collecting means is a filter arranged so as to be inclined on each gas passage. 2. The dust collector according to claim 1, wherein the filter is inclined so as to face the gas inlet portion and the gas outlet portion. 3. The shock / vibration applying means for applying shock or vibration to each of the filters is provided on an upper side surface facing the gas outlet, in each of the filters. The dust collector described. 4. A bypass opening that connects the upper side surface of the filter and the lower space is formed in a lower portion of the partition wall, and a bypass opening opening / closing door that opens and closes the bypass opening is formed in the bypass opening. The dust collecting device according to claim 1, wherein the dust collecting device is provided. 5. The gas inlet portion is opened upstream of an adjacent gas passage, and the gas inlet portion is provided with a distribution guide for distributing an inflowing gas to another gas passage. A dust collector according to any one of the preceding claims. 6. The dust collecting apparatus according to claim 1, wherein a funnel-shaped dust collecting casing is provided at a lower portion of the casing. 7. The pre-stage according to claim 1, wherein an attachment / detachment opening for attaching / detaching the filter is formed in an upper portion of the casing, and the attachment / detachment opening is provided with a lid portion for opening / closing the attachment / detachment opening. The dust collector according to any one of the above. 8. The pre-stage device according to claim 1, further comprising a control unit that operates the shock / vibration applying unit and controls the bypass opening / closing door to open the bypass opening. The dust collector described. 9. The method according to claim 1, further comprising control means for controlling the bypass opening / closing door to open the bypass opening when the function of the filter is significantly deteriorated. The dust collector described. 10. The filter is composed of a side surface forming member formed in a mesh of a predetermined size, and silicon carbide fibers housed in a space defined by the side surface forming member at a predetermined density. The dust collecting apparatus according to any one of the preceding claims. 11. A dust collecting system comprising a plurality of the dust collecting apparatuses according to any one of the preceding claims, which are arranged in parallel through a duct connected to the upstream side and the downstream side of the dust-containing gas. . 12. The dust collecting system, wherein an upstream duct of the dust collecting device is provided with a dust collecting device selecting door for opening and closing a duct leading to each dust collecting device. 13. A duct leading to a dust collector having a reduced dust collecting function is closed by the dust collector selecting door, the shock / vibration applying means of the dust collector is operated, and the bypass port is opened. 13. The dust collecting system according to claim 12, further comprising control means for controlling the bypass opening / closing door.