JPS6064183A - Heat-insulating bug dust collector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a heat-resistant bag dust collector that collects and removes dust such as dust in high-temperature exhaust gas generated from incinerators and dealers for various industrial wastes, radioactive materials, etc. This invention relates to a heat-resistant bug dust collector using ceramic rug bugs.

Many dust collectors, generally called bag filters, are already known, but in this case, the bag that over-collects dust is made of furnace cloth, and the furnace cloth is used to collect dust from the high-temperature exhaust gas mentioned above. It was unusable because it was burnt out.

By the way, in recent years, research and development of ceramics has progressed rapidly.
It has been used for various purposes.

In particular, it has excellent heat resistance, making it ideal for collecting dust from high-temperature exhaust gas as mentioned above, and realizing a bag dust collector that uses porous ceramic bags instead of the conventional furnace cloth. has been strongly requested.

By the way, although the ceramic bug mentioned above has excellent heat resistance, it is weak against shock and vibration, so it cannot be easily installed and maintained, and there is also a problem with the sealing performance of the installation part. If the ceramic bag is completely fixed to the support plate etc. with priority given to sealing performance, maintenance such as replacement of the bag will be difficult, and in any case, many problems remain for practical application. The present invention was made in view of the above circumstances, and its purpose is to make the structure simple and to make assembly and bug replacement easy and reliable, and to avoid problems such as damage to the bug. The object of the present invention is to provide a highly practical heat-resistant bag dust collecting device that has excellent not only heat resistance but also excellent flexibility.

In other words, the heat-resistant bug dust collection device of the present invention provides bug guides such as heat-resistant and elastic bug guides on the inner peripheral edge of each of the plurality of bug attachment holes of the support plate in the dust collection house, and A porous ceramic bag having a flange integrally attached to the upper end thereof is inserted into the guide from above, and is vertically installed in each bag mounting hole of the support plate, and the upper end flange of the bag is placed on the support plate. A tightening jig that clamps and fixes the bag with heat-resistant and elastic nine-pieces is installed, and a heat-resistant bag shaking prevention ring that holds the bottom end of each bag is installed inside the dust collection house. The structure has excellent heat resistance, and the installation of the porous ceramic bag is easy and reliable, and it is resistant to shock waves when inserting and removing the bag, gas flow during dust collection operation, or shock waves from backflow air and dirt. This can reduce vibration, prevent damage to the bag, and at the same time provide a high sealing effect.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is the dust collection house of the heat-resistant bug dust collector, which is shaped like a rectangular box made of heat-resistant metal, and has a dust collection hopper = 2 for dust to be brushed off in the lower part, and is mounted on the underframe 3. Supported. Incidentally, a screw conveyor 4 for discharging dust and a discharge valve 5 are attached to the lower end of the lower dust collection hollow 2.

Inside the dust collection house 1, a plurality of partition plates 6 are vertically fixed from the upper end to the lower end of the lower dust collection hole 2 at equal intervals in the longitudinal direction. The inside of the dust collection house 1 is vertically divided into a plurality of dust collection sections A-B-C...
・It is divided into In addition, each dust collection section A-B-C... in the dust collection house 1 has a support plate 7 with a bug attachment hole 7a installed horizontally near its upper end, so that its lower side becomes a dust collection chamber. The upper part is divided into a clean air room. One bug 8 made of porous ceramic, which will be described later, is vertically installed in each of a large number of bug attachment holes 7a arranged at equal intervals on the support plate 7. Furthermore, the above dust collection house 1
An inlet duct 9 for introducing high-temperature exhaust gas from blast furnaces, incinerators, etc. is installed on the lower front side of the inlet duct 9, which is branched and connected to each dust collection section A-B-C... An outlet duct 10 having a connection port IO& that connects with the upper clean air chamber of each dust collection section A-B-C... of the dust collection house 1 is attached to the part, and the outlet duct 10 is shown in the figure. However, it is connected to an outdoor exhaust pipe via an exhaust fan. Note that an offline dan/#-77 is attached to each connection port ZO& of the outlet duct 10. Furthermore, a collected dust dust removal mechanism 12 is provided in the upper part of the dust collection house I. This consists of a compressed air introduction pipe 13 installed outside the house and an electromagnetic diaphragm valve I.
4, and two air pipes 15 are installed in the upper clean air chambers of each dust collection section A-B-C of the dust collection house 2 in correspondence with each bag arrangement. Each of the air pipes 15 is provided with a nozzle 15m for blowing pulse jet air as backwash air for dust removal and removal from directly above each bag 8. In addition, 16 in the figure is dust collection house I
This is an inspection manhole that is closed during normal times and is installed in each dust collection section A, B, B, C, etc. on the top plate.

Here, the porous ceramic bags 8, which are provided in large numbers hanging in each of the dust collection sections A, B-C, etc., are made by molding and sintering ceramic raw materials. It has a vertically elongated cylindrical shape with an open top end, and a brim-like flange 8a is integrally formed on the outer periphery of the top end of the opening.

In addition, to describe the structure of how the ceramic bug 8 is attached to the support plate 7, each bug attachment hole 7 of the support plate 7 is
& is formed one size larger than the outer diameter of the body part of the bug 8,
A rectangular cylindrical bug guide 17 made of silicone and having high heat resistance and appropriate elasticity is attached to the inner circumferential edge of the bug attachment hole 1a so as to protrude downward through a receiver 7b. The bug 8 is inserted into the id 17 from above the bug attachment hole 7a of the support plate 7.
is installed vertically. Also, the upper end flange 8 of the bug 8
a does not come into direct contact with the upper surface of the support plate 7, but an annular packing 18 made of silicone having high heat resistance and appropriate elasticity is interposed between the two, and the upper surface of the flange 8a also has the above-mentioned Cushioning material 1 similar to Yatsukin 18
The flange 8a is held in place by a tightening jig 20 from above so as to sandwich the flange 8a with the flange 9 interposed therebetween. The tightening jig 20 includes a stud 21 vertically fixed on the upper surface of the support plate 7, and a nut 22 that is fitted into the stud z1 to tighten the flange 8a.
There is a holding plate 23 that presses down from above from above through a holder. Four types of reeds, one for holding down the flanges of the four bugs that fit with the other, are all fitted to the stud 21 through the horizontally long hole 23m so that they can slide or rotate laterally, and the nut 22 By loosening the flange 8, the flange 8 can be shifted to release the pressing force.

On the other hand, a ring 2 holds the outer periphery of the lower end of the ceramic bag 8 in a concave manner to prevent the bag 8 from rolling.
4 are provided. This ring 24 is made of a heat-resistant material such as round steel or steel wire, and is made into a circular ring of a size that allows the bag 8 to be inserted and removed.
They are connected to each other by connecting members 25 made of the same material so that they are lined up in the same arrangement, and are stretched over the lower part of each dust collection section A-B-C in the dust collecting section A-B-C. It is set up.

In the heat-resistant bag dust collector configured as described above, high-temperature exhaust gas is sucked and conducted from the inlet duct 9 to the lower part of the dust collection chamber in each dust collection section A-B-C of the dust collection house 1. Ru. At this time, each section A of the inlet duct 9
-B-C... The high-temperature exhaust gas is transferred to each section A-B,
It flows into C... without being biased in quantity, and each is rectified. The high-temperature exhaust gas that has flowed into the dust collection chambers in each section A-B, C... is forced to flow through the porous part of the peripheral wall of the porous ceramic bag 8 from the outside to the inside. The purified air passes through the bag 8 and is sucked into the upper clean air chamber through the opening at its upper end, and from there is exhausted to the outdoors etc. from the exhaust pipe through each outlet duct Zo. The dust filtered and collected by each porous ceramic bag 8 is dusted off by the operation of the dust removal mechanism 12 at an appropriate time when the amount of dust collected increases and the pressure drop of the bag becomes high.
It is removed from inside the machine via a screw conveyor 4 and a discharge valve 5. Before the introduction of the dust removal mechanism 12, the compressed air that has come through u13 is sent under force to the diaphragm valve 14, which opens at a preset cycle, and the dust is removed from each nozzle. By injecting backwash air from 15 m into each bag 8 as gurus jet air, the dust collected in the porous part of the peripheral wall of the bag 8 is blown out to the outer peripheral side of the bag 8 and falls. This is done by letting

The collected dust is removed by closing the off-line damper 11 on the outlet duct side of each dust collection section and temporarily stopping the suction and introduction of high temperature exhaust gas into the section. As a result, when the dust collected in the porous part of the bag 8 is blown away by backwashing or by blowing Lusujet air, the dust can be blown inside the bag 8 (clean side) by the high-temperature exhaust gas flow. It is possible to prevent dust from adhering to neighboring bugs 8, and to perform a connected dust collection operation by introducing high-temperature exhaust gas into other sections.

Here, the bag device with the above configuration uses the porous ceramic bag 8 with high heat resistance, and other various parts also have heat resistance, so there is no problem of burnout, etc., and various high-temperature exhaust It is effective for collecting gas dust. still,
The porous ceramic bug 8 is attached to the bug attachment hole 2a of the support plate 7.
Even if the bag 8 has a simple configuration in which it is hung vertically, the upper end flange 8a formed integrally with the bag 8 is sandwiched between a heat-resistant and elastic packing 18 and a cushioning material 19 on the support plate 7, and the bag 8 is tightened. The pi attachment is held by the tool 20, and
Since the bug having heat resistance and elasticity on the inner periphery of the bug mounting hole 7a is surrounded by the id 17, it does not directly hit the support plate 7, and the lower end of the bug 8 is held by the ring 24 to prevent horizontal shaking. Therefore, even if the porous ceramic bag 8 is vulnerable to shocks and vibrations, its insertion and assembly can reliably prevent damage during work or operation. This ensures that high-temperature exhaust gas does not leak into the clean air chamber without being filtered.

Since this invention has been made as described above, the structure is simple and assembly is easy and reliable.The use of porous ceramic bags has excellent heat resistance, and there are no problems such as breakage of the bags. It has excellent properties and is extremely useful and practical for collecting dust from high-temperature exhaust gas.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway plan view, FIG. 2 is a front view, and FIG.
FIG. 4 is an enlarged cross-sectional view of the main part, and FIG. 5 is a cross-sectional view taken along the line ■-v in FIG. 4. l...Dust collection/Use, 2...Lower hole! -13・
... Underframe, 4... Screw conveyor, 5... Discharge valve, 6... Partition plate, 7... Support plate, 7a... Nomag mounting hole, 7b... Receiver, 8 ...Made of porous ceramic, 8a...Flange, 9...Inlet duct, 10...Outlet duct, 10a...Connection port, II...Offline Danno 4-1J 2...
Dust removal mechanism, 13... compressed air introduction piping,
14...Diaphragm valve, J5...Air pipe,
15a... Nozzle, 16... Inspection manhole, 17
.../(Gu guide, 18...zotsukin, 19...
・Buffer material, 20... Tightening jig, 2I... Stud,
22... Nut, 23... Presser plate 24/ring, 2
5... Connecting material.

Claims (1)

[Claims] A support plate with multiple bug mounting holes is provided in the fruit head where high-temperature exhaust gas can be introduced and backwash air pulses can be introduced to remove collected dust. A cylindrical back guide having heat resistance and elasticity is provided in the support plate, and a porous ceramic bag integrally having a flange at the upper end is inserted into the back guide from above. A tightening jig is installed vertically in the mounting hole and clamps and fixes the upper end flange of the bag on the support plate through a heat-resistant and elastic /4' bolt, and the lower end of each This heat-resistant bug dust collector is constructed by providing a heat-resistant bug return prevention ring inside the container.