JPH07163824A - Deduster - Google Patents

Abstract

PURPOSE:To perform easily and highly efficient recovery of dust removed from an exhaust gas, etc., by an apparatus wherein a particulated filter medium is stored in a container and the particulated filter medium is stirred by means of an air flow from an air ejecting means and the adherent dust is removed. CONSTITUTION:A gas exhausting hole 1 is formed on the upper end of a housing 1 with a rectangular trunk cross section and a dust storing part 1A the cross section of which is gradually made narrower is formed on the lower part thereof. Box-shaped storing containers 2 are arranged by multi-stages in the upper and lower directions in the trunk of the housing 1 and a particulated porous carbon filter medium P is stored therein. Then, when an exhaust gas is made to flow in the housing 1 from an air inlet 1e, impurities such as smoke, NOx, chlorine gas are removed with the particulated porous carbon filter medium P. When timing for removing this dust comes, an electromagnetic valve V1 is intermittently opened and closed and air compressed by means of a compressor is ejected from a number of ejecting holes in a nozzle 5. The filter medium P is vibrated thereby and the dust is fallen down below. The similar procedure is done on the lower stage and the dust is stored in the storing part 1A.

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 cooling high temperature exhaust gas discharged from a melting furnace or a dust remover for removing dust contained in general exhaust gas.

[0002]

2. Description of the Related Art FIG. 13 is a sectional view showing a conventional aluminum alloy melting furnace.

In the figure, when a return material that has been once made into an aluminum alloy, an ingot 23 of aluminum alloy (hereinafter simply referred to as "ingot"), is supplied into the preheating tower 22 of the melting furnace 21, the ingot 23 After being heated in the preheating tower 22, it is completely melted by the burner 25 in the melting chamber 24. The molten aluminum alloy melted in the melting chamber 24 is pumped out from the molten metal outlet 26. In melting, the molten metal surface and burner 25
Since exhaust gas is generated from the exhaust gas, it is discharged to the outside through the exhaust duct 27. However, if exhaust gas is directly discharged to the outside,
Since the environment inside the factory is deteriorated and the residents around the factory will be damaged, a dust remover is attached to the melting furnace 21 so that exhaust gas is filtered and removed by a bag filter before being discharged. ing.

When the molten aluminum alloy is melted in the atmosphere, zinc, magnesium, titanium and the like contained in the alloy promote the promotion of aluminum oxide film formation, and these oxides are dissolved during melting. It becomes a fine oxide and mixes in the molten metal. Since the specific gravity of the oxide is almost the same as the specific gravity of the molten aluminum alloy, when mixed in the molten metal, the hydrogen gas that floats in the molten metal and penetrates into the molten aluminum alloy is adsorbed by the fine oxide. When this molten metal is poured into the mold, it mixes into the product, and foreign matter is mixed in or pinholes are generated due to hydrogen gas. In addition, when molten metal containing a large amount of oxide adheres to the small protrusions in the mold (metal mold), the oxide overlaps and adheres to that portion each time it is repeatedly poured, eventually forming a hard oxide layer. When pulling out the product from the mold, it interferes with the product, and the product does not come off, distortion occurs even if it comes off, and sometimes it causes damage such as damage. Therefore, in order to clean the molten aluminum alloy, it is necessary to remove the oxides generated on the molten metal surface of the melting furnace 24 and at the same time remove the fine oxides floating in the molten metal. Therefore, twice to several times a day, a flux, which is a flux for antioxidation and degassing, is charged into a molten metal, stirred, and reacted to generate a fine gas, which is suspended in the molten metal. The oxide is adsorbed and floated to clean the molten metal, and the oxide on the surface of the molten metal is separated from the aluminum alloy. When the oxide is removed, it is mixed in the oxide and discharged at the same time. The amount of loss of the aluminum alloy, which is a different matter, is reduced.

Here, when the gas discharged from the melting furnace 21 is supplied to the melting furnace 21 with the ingot 23 being full, the material receives heat in the preheating tower 22 in the melting furnace 21 to exchange heat. Therefore, the temperature of the exhaust gas is relatively low and is about 200 to 300 ° C.

On the other hand, when the ingot 23 is completely melted and no material is replenished, there is no heat exchange with the ingot 23 having a low temperature, so that the inside of the melting chamber 24 is heated by the burner 25 and has a high temperature. The gas is exhausted as it is, and the exhaust gas has a high temperature of about 500 ° C. Further, the gas discharged from the melting chamber 24 becomes high in temperature due to the reaction heat when a flux, which is a flux for performing the above-mentioned oxidation prevention and degassing treatment, is introduced into the molten metal.

Further, when all the materials charged in the melting chamber 24 are melted once a day or once a week and transferred to the holding chamber, and the inside of the melting furnace 21 is cleaned using flux, The burner 25 is burned until all the material is melted. Therefore, high-temperature exhaust gas is discharged from the furnace top.

The gas in the melting furnace 21 heated to a high temperature by melting and operating these is exhaust duct 27 from the viewpoint of thermal efficiency.
The exhaust duct 2 while sucking the ambient air from a small opening 28 formed in the connecting portion with the channel steel or the like.
Although it is cooled to some extent in order to flow through the inside 7, it is in a considerably high temperature state when passing through the auxiliary dust removing device.

If this exhaust gas flows into the dust removing device at a high temperature, there is a risk that the dust removing device will abnormally heat or burn. Therefore, the dust remover should be installed in the melting furnace 2
Installed in a place away from 1 to cool the exhaust gas, measure the temperature of the inflowing high temperature exhaust gas, and when it becomes a dangerous temperature,
A device that lowers the temperature by mixing secondary air is attached to prevent the occurrence of abnormalities.

[0010]

However, in order to prevent the occurrence of abnormalities due to high-temperature exhaust gas, a dust remover is installed as far away as possible from the melting furnace 21, and the exhaust gas is cooled while flowing through the duct between them. Since the distance between the melting furnace and the dust remover is long, the equipment cost is high and a large installation space is required.

Further, when the temperature is lowered by mixing secondary air, the apparatus becomes large in size because it is necessary to send out a large amount of secondary air in a short time, and as in the former case, the equipment cost becomes high and a large space is required. It costs.

Since a low-temperature low-speed gas burner for melting and holding an aluminum alloy has been developed for several years, a high-performance furnace with less thermal oxidation and high thermal efficiency has been popularized.
Not only small and medium-sized factories, but also large factories are frequently used to reduce defects of aluminum alloy castings and cast high-quality aluminum castings, and along with this, the environment of the factories is improving as well as energy saving. However, in a foundry where air is easily polluted, this alone cannot secure a sufficiently good environment, and there is an urgent need to further improve the environment. The high-temperature exhaust gas discharged from the melting furnace 21 has a great influence not only on the inside of the factory but also on the environment around the factory.

In consideration of these matters, the present inventors have
A multi-stage storage container that allows passage of high-temperature exhaust gas discharged from the melting furnace is installed inside, and a granular porous carbon-based filter material that cools by exchanging heat with the high-temperature exhaust gas that passes through the inside of this storage container is installed. A dust removal cooling device for a melting furnace filled through a wire net was provided as Japanese Patent Application No. 4-346395.

However, if the dust removal efficiency of the above-mentioned dust removal cooling device of the melting furnace is improved, the dust is accumulated in the particulate porous carbon-based filter material, and the removal efficiency is lowered with the passage of time. It has become clear that in the case of removing dust from exhaust gas, there is a high possibility that the discharged thermal energy will be stored in the accumulated dust.

[0015] Therefore, an object of the present invention is to provide a dust removing device which can easily collect dust removed from exhaust gas and the like and always has a good dust removing efficiency.

[0016]

According to a first aspect of the present invention, there is provided a dust removing device, which has a dust discharge portion at a lower portion thereof, and a housing having an intake port and an exhaust port positioned above the dust discharge portion,
A storage container that is incorporated in the housing and that stores the particulate filter material for removing dust; and an air ejection unit that removes dust adhering to the particulate filter material by an air flow that ejects the granular filter material accommodated in the accommodation container. It is equipped with.

According to a second aspect of the present invention, there is provided a dust remover which has a dust discharge portion at a lower portion thereof and a housing having an intake port and an exhaust port which are located above the dust discharge portion, and a granular filtration which is incorporated in the housing to remove dust. A plurality of accommodating containers accommodating the material, and a plurality of air ejecting means corresponding to the accommodating containers for removing the dust adhering to the granular filter media by the air flow ejecting the granular filter media accommodated in the respective accommodating containers And a control for sequentially operating the air ejecting means located at the upper part toward the air ejecting means located at the lower part to drive the respective air ejecting means so as to sequentially remove dust adhering to the granular filter medium downward. And means.

According to a third aspect of the present invention, there is provided a dust remover for exchanging heat between the high temperature exhaust gas and the particulate filter media contained in the plurality of storage containers according to claim 1 for cooling and filtering the exhaust gas. It is a granular porous carbon-based filter material.

[0019]

According to the first aspect of the present invention, there is provided a dust removing device, which has a dust discharging portion at a lower portion thereof, and accommodates a granular filter material for removing dust incorporated in a housing having an intake port and an exhaust port located above the dust discharging portion. The storage container agitates the granular filter medium by the air flow ejected from the air ejecting means, and removes dust adhering to the granular filter medium.

According to a second aspect of the present invention, there is provided a dust removing device which has a dust discharging portion at a lower portion thereof and accommodates a granular filter material for removing dust which is incorporated in a housing having an intake port and an exhaust port which are located above the dust discharging portion. The storage container removes dust accumulated between the granular filter media and dust adhering to the granular filter media by the air flow ejected from the air ejection means. At this time,
By the control means, the air ejecting means located in the lower order is operated from the air ejecting means located in the upper order, and the dust adhering to the granular filter medium is forcibly dropped downward and collected.

According to a third aspect of the present invention, there is provided a dust-removing device in which the particulate filter material contained in the plurality of storage containers according to the first or second aspect is heat-exchanged with high-temperature exhaust gas to cool and filter the exhaust gas. By using the granular porous carbon-based filter material as described above, the dust removal efficiency and the temperature rise can be efficiently reduced.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a dust remover according to an embodiment of the present invention as seen from the front and an overall configuration diagram showing an electrical control circuit diagram. 2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is an explanatory view of a main part configuration and an operating principle of a dust remover according to an embodiment of the present invention, and FIG. FIG. 5 is an explanatory view showing a main configuration of a container used in the dust remover according to one embodiment of the present invention, and FIG. 5 shows an arrangement state of wire meshes of the container used in the dust remover according to one embodiment of the present invention. FIG. 6 is an explanatory view of a main part configuration, and FIG. 6 is an explanatory view of an operation principle of a dust removing device according to an embodiment of the present invention.

In FIG. 1, the dust removing apparatus of this embodiment is erected by a plurality of legs 1a, and its body has a housing 1 having a predetermined rectangular cross section. The upper end of the housing 1 serves as an exhaust port 1b whose cross-sectional area is reduced and which is connected to a duct or blower (not shown). The lower part of the housing 1 has a cross-sectional area that is gradually narrowed to form a dust container 1A, and the dust discharge port 1c is formed at the lowermost end.
Are formed. The dust discharge port 1c can remove the accumulated dust stored in the dust storing portion 1A by opening and closing the gate plate 1d. An intake port 1e for guiding exhaust gas from the exhaust duct 27 and the like shown in the conventional example is formed on the lower side surface of the housing 1. More specifically, the dust container 1A is lower than the intake port 1e formed on the side surface of the lower portion of the housing 1, and is positioned so that the accumulated dust does not easily close the flow of the intake port 1e. That is, the housing of the present embodiment has a dust discharge part including the dust discharge port 1c at the lower part, and an intake port 1e and an exhaust port 1b located above the dust discharge part.

Inside the body of the housing 1, as shown in FIGS. 2 to 5, box-shaped storage containers 2 are vertically arranged in multiple stages (three stages in the figure). A handle or the like is attached to the front surface of each storage container 2, and the guide 1f in the housing 1 allows the storage container 2 to be taken in and out in the front-back direction. Further, each storage container 2 has an open top and bottom, and a wire mesh 3b having a mesh to the extent that the granular porous carbon-based filter material P does not drop is stretched on the top and bottom, and the top surface thereof is provided. A wire mesh 3a having a mesh to such an extent that the granular porous carbon-based filter material P is not easily dispersed is stretched.

Here, the granular porous carbon-based filter material P is a filter material obtained by mixing sludge generated when paper or waste paper is remanufactured with clay into particles, which are carbonized in a kiln and baked. This granular porous carbon-based filtration material P is sold under the trade name "Excellite" manufactured by (ex) Excellite Industries (formerly Nippon Filter Ceramics). Particle size is 2-5
The granular porous carbon-based filter material P having an optimum particle size is used, which is about mm, and is sorted in consideration of the exhaust amount and the exhaust speed corresponding to the capacity of the melting furnace. And in line with that,
As shown in FIG. 4, the mesh size of the metal nets 3a and 3b of the storage container 2 is set. The relationship between the granular porous carbon-based filter material P, the upper surface metal net 3a, and the lower surface metal mesh 3b is shown in FIG.
And, as shown in FIG. 5, when appropriate vibration is applied to the space between the upper and lower metal meshes 3a and 3b, the granular porous carbon-based filtration has an amount of about 80 to 99%. The material P is accommodated. That is, the appropriate storage capacity of the granular porous carbon-based filter material P is such that the particles can vibrate due to a sudden change in air pressure, and the fluid in the housing 1 is on the surface of the particles of the granular porous carbon-based filter material P. The condition for contacting as long as possible is given.

That is, the granular porous carbon-based filter material P is contained in the storage container 2 which is a frame, the upper wire mesh 3a and the lower wire mesh 3b, and the space formed by the container 2, the wire mesh 3a and the metal mesh 3b. The storage container 2, the wire netting 3a and the wire netting 3b, and the granular porous carbon-based filter material P that are housed constitute the filter 8 of this embodiment. For convenience of explanation, the upper one of the filters 8 is the filter 8A,
The middle one is the filter 8B and the lower one is the filter 8C.
The item common to the whole is called the filter 8.

The upper surface of each box-shaped filter 8 is shown in FIG.
As shown in FIG. 3, a plurality of nozzles 5 which are parallel to the wire mesh 3a on the upper surface and parallel to each other are arranged. In this embodiment, on the upper surface of each filter 8, six nozzles 5 which are parallel to the upper surface metal net 3a and are adjacent to each other are provided.
Is provided. 6 nozzles 5 arranged at the top
Are collectively connected to the electromagnetic valve V1. In addition, innumerable injection holes are formed on the wire mesh 3a side of the upper surface of the filter 8 of each nozzle 5, and the high pressure air supplied from the compressor (not shown) to the nozzle 5 via the electromagnetic valve V1 is transmitted to the nozzle 5. It is ejected from the innumerable ejection holes that have been bored, and is ejected onto the granular porous carbon-based filter material P through the metal net 3a on the upper surface. Then, 6 arranged in the second stage from the top
The six nozzles 5 are collectively connected to the electromagnetic valve V2, and the six nozzles 5 arranged in the third stage from the top are collectively connected to the electromagnetic valve V3. The high pressure air from the top six nozzles 5 is the electromagnetic valve V1, and the high pressure air from the six nozzles 5 arranged in the second stage from the top is the solenoid valve V2. The high pressure air of the six nozzles 5 provided is controlled by controlling the electromagnetic valve V3 by the control circuit CPU. This control circuit CPU
Is composed of a microcomputer.

The control circuit CPU drives and controls the compressor (not shown) in addition to the above-mentioned control of the electromagnetic valves V1, V2, V3, and receives the output of a pressure sensor for detecting the tank internal pressure of the compressor (not shown). ing.

Next, the dust removal of exhaust gas by the dust remover of the present embodiment configured as described above will be described.

FIG. 7 is a flow chart showing the control of the dust remover according to one embodiment of the present invention. 8 to 12 are explanatory views showing the state of dust removal in the control process of the dust remover according to one embodiment of the present invention.

The program for performing this control starts its operation at the same time when the power of the dust removing apparatus of this embodiment is turned on.

When the high temperature gas is discharged from the melting furnace, the exhaust gas flows into the housing 1 through the intake port 1e by the operation of a blower (not shown). Housing 1
The exhaust gas that has flowed in passes through the filters 8 arranged in three upper and lower stages in order from the lower stage to the upper stage.

At this time, since the granular porous carbon-based filter material P contained in each container 2 has both good thermal conductivity and good heat dissipation, it is accumulated in the high temperature exhaust gas passing through the filter 8. The amount of heat generated is heat-exchanged with the particulate porous carbon-based filter material P, becomes a low temperature, and flows out from the discharge port 1b. Further, since the granular porous carbon-based filter medium P is porous and acts as a filter medium, while soot and other impurities such as NOx and chlorine gas in the exhaust gas pass through the granular porous carbon-based filter medium P. To be removed.

The temperature of the exhaust gas is not always constant,
The exhaust gas of high temperature and low temperature is alternately discharged and passes through the granular porous carbon-based filter material P, which changes due to changes in the supply state and the melt state of the material in the melting furnace. For this reason,
The particulate porous carbon-based filter material P that has been heated to a high temperature is cooled conversely when the next low-temperature exhaust gas passes through. On the other hand, the low-temperature exhaust gas that has passed through this portion is received by the particulate porous carbon-based filter material P, then flows into the filter 8 located at the upper stage, is cooled there, and is then discharged from the discharge port 1b. . As a result, the cooling effect is greater when the layer of the granular porous carbon-based filter material P is thick and is divided into multiple layers to form a multi-layer.

While the granular porous carbon-based filter material P receives heat and deteriorates during use, the granular porous carbon-based filter material P on the inflow side of high-temperature exhaust gas and the granular porous carbon on the outflow side Since the degree of heat storage greatly differs from that of the system filter material P, the degree of deterioration also differs, and the degree of deterioration naturally increases on the inflow side where the heat storage is large.

As described above, in the dust remover of the above-described embodiment, the high-temperature exhaust gas discharged from the melting furnace has a plurality of stages of filters 8.
When passing through, the granular porous carbon-based filter material P housed between the wire nets 3a and 3b exchanges heat with the hot exhaust gas, cools the exhaust gas, and removes dust from the exhaust gas.

During this time, the control circuit CPU operates as follows.

First, at the same time when the power of the dust removing apparatus of this embodiment is turned on, this program is executed and after initialization (not shown), the built-in timer is started in step S1 to set the value of the pressure sensor of the compressor (not shown). It is determined whether or not the tank internal pressure is maintained at or above the predetermined value P. If the tank internal pressure is not maintained at or above the predetermined value P at step S2, the compressor is driven at step S3 to always maintain the predetermined value P or above. The compressor is drive-controlled to maintain the internal pressure.

Then, in step S4, the arrival of the dust removal timing is determined by the elapse of the timer T0. That is, the dust removal timing is performed at a time interval set as a time period T0 in the timer, and this time period T0 is usually 1 to
It is set to about 10 hours. The dust remover of the present embodiment removes dust at each time interval. Step S
In step 4, the processing of the routine of steps S2 to S4 is continued until it is determined that the timer T0 has reached the dust removal timing.

The time period T0 may be set as a manual condition. That is, it is possible to detect a specific switch operation or a sensor operation. For example, it can be set when the exhaust gas emission is stopped or when the exhaust gas is reduced.

When it is determined in step S4 that the timing of dust removal has arrived by the lapse of the timer T0, the electromagnetic valve V1 is intermittently opened and closed in step S5, and the high pressure air compressed by the compressor is as shown in FIG. A high-pressure air stream is ejected from a myriad of ejection holes formed in the nozzle 5, and the high-pressure air is ejected to the granular porous carbon-based filter material P through the metal net 3a on the upper surface of the uppermost filter 8A. by this,
Each particle r of the granular porous carbon-based filter material P housed in the uppermost filter 8A vibrates, and as shown in FIG. 6A, dust s adhering to each particle r and staying between each particle. Dust is
The dust s is blown off by the high-pressure air flow, and the dust s is shaken down by gravity and the high-pressure air flow, as shown in FIG. 6B.

Particularly, in a normal exhaust gas flow, the dust s adheres to the wire mesh 3b on the lower surface side and the lower surface of the granular porous carbon-based filter material P housed in the uppermost filter 8 from that flow. The dust s adhering to the lower surface side and the lower surface of the metal mesh 3b of the granular porous carbon-based filter material P due to the high pressure air flow from the upper part falls as a dust lump.

In the case of the filter having a plurality of stages of filters 8 as in this embodiment, since the amount of dust s attached to the granular porous carbon-based filter material P contained in the uppermost stage filter 8A is small, Although the pressure escapes from the discharge port 1b, the granular porous carbon-based filter material P is cleaned by the high pressure air flow. However, it is more effective to dispose a damper that opens and closes the fluid passage in the exhaust port 1b or a duct that extends from the exhaust port 1b and control the electromagnetic valve V1 to close the damper during the intermittent open / close control period. Becomes

Next, when it is determined in step S6 that the dust removal timing of the second-stage filter 8B from the top has arrived when the timer T1 has elapsed, the electromagnetic valve V1 which was intermittently controlled during that time is closed, and step S7 is performed. 9, the electromagnetic valve V2 is intermittently opened and closed, and the high-pressure air compressed by the compressor is ejected from the numerous injection holes formed in the nozzle 5, as shown in FIG. High-pressure air is jetted onto the granular porous carbon-based filter material P through the metal net 3a on the upper surface of 8B. As a result, each particle r of the granular porous carbon-based filter material P contained in the filter 8B vibrates,
As shown in FIG. 6A, the dust s attached to each particle is
The dust s is blown off by the high pressure air flow, and the dust s is shaken down by gravity and the high pressure air flow, as shown in FIG. 6B.

Next, in step S8, the filter 8 at the bottom is
When the arrival of the dust removal timing of C is judged by the elapse of the timer T2, the electromagnetic valve V2 which was intermittently controlled during that time is closed, the electromagnetic valve V3 is intermittently opened and closed in step S9, and it is compressed by the compressor. High pressure air is shown in Figure 1.
As shown in FIG. 0, the wire mesh 3a on the upper surface of the filter 8C at the lowermost stage is ejected from the numerous injection holes formed in the nozzle 5.
High-pressure air is jetted through the granular porous carbon-based filter material P through the. As a result, each particle r of the granular porous carbon-based filter material P contained in the filter 8C vibrates, and the dust s attached to each particle r is blown off by the high-pressure air flow as shown in FIG. Then, the dust s is shaken down by the gravity and the high-pressure air flow.

Then, in step S9, the electromagnetic valve V3 is opened and closed intermittently, and the high-pressure air compressed by the compressor continues until it is determined in step S10 that the timer T3 has elapsed. In step S10, the timer T3 elapses. When the determination is made, the timer is cleared in step S11 and the process returns to the routine from step S1.

As a result, the dust s is removed from the granular porous carbon-based filter material P contained in all the filters 8 and falls, and is contained in the dust container 1A as shown in FIG. The dust s stored in the dust storage portion 1A is taken out from the housing 1 to the external work carriage 10 or the like by opening the gate plate 1d of the dust discharge port 1c, and the dust s stored in the dust storage portion 1A is removed. You can

As described above, the dust removing apparatus according to the present embodiment has the dust discharge portion including the dust discharge opening 1c at the lower portion, and the housing 1 having the intake opening 1e and the exhaust opening 1b located above the dust discharge portion. And incorporated into the housing 1,
A plurality of filters 8 for accommodating the granular filter material made of the granular porous carbon-based filter material P for removing dust, and the respective accommodating containers 2
An air ejecting means comprising a plurality of nozzles 5 corresponding to each filter 8 for removing dust adhering to the granular filter medium by an air flow ejecting the granular filter medium composed of the granular porous carbon filter medium P stored in , The dust s and the filter adhered to the granular filter medium made of the granular porous carbon-based filter medium P are sequentially operated from the air jet unit located at the upper side to the air jet unit made up of the nozzle 5 located at the lower side. The present invention further comprises a control means including a control circuit CPU for driving the air ejection means including the nozzles 5 so as to sequentially remove dust accumulated between the materials downward. This is an embodiment of claim 2. be able to.

Therefore, the dust s adhering to the granular filter medium made of the granular porous carbon filter medium P contained in the upper filter 8 and the dust accumulated between the filter medium are sequentially removed downward. In particular, since fine dust is likely to stop on the filter 8 at the upper position, the dust is dropped downward from the filter 8 on the upper position, so that the dust that has fallen does not stop on the filter 8 one after another. It can be dropped from the filter 8 and stored in the dust container 1A.

In particular, the intermittent operation by the air jetting means composed of the nozzle 5 according to the present embodiment vibrates the dust S adhering to the granular filter material composed of the granular porous carbon-based filter material P, so that the dust S is firmly fixed. It can be easily peeled even under various adhesion conditions. Further, granular porous carbon-based filter material P
The removal efficiency can also be improved by the rubbing of the granular filter material consisting of. However, when the present invention is carried out, high-pressure air may be continuously jetted, or immediately after jetting from the air jetting means comprising the nozzle 5 or until reaching the air jetting means comprising the nozzle 5. Further, a means for generating a pulsating flow may be attached.

Further, in this embodiment, dust is sequentially dropped downward from the uppermost filter 8 arranged in the uppermost stage, but when removing the dust s from the uppermost filter 8A, the housing 1 is removed. Since there is a possibility that the dust s will be scattered from the exhaust port 1b, the removal of the dust s from the uppermost filter 8A can be stopped, and the dust can be sequentially dropped downward from the next filter 8B. Then, as described above, the damper can be disposed on the exhaust port 1b side of the housing 1, and the damper can be closed in the dust removing step to prevent scattering.

The container 2 which constitutes the filter 8
The granular porous carbon-based filter material P stored in the container is deteriorated by being exposed to a high temperature, but the granular porous carbon-based filter material P that has become dust s due to the deterioration is partially peeled off, and is removed together with the dust s. Since it is recovered, the granular porous carbon-based filter material P
The activity of can be maintained.

Further, the granular porous carbon-based filter medium P contained in the container 2 is composed of a plurality of nozzles 5 for removing dust adhering to the granular porous carbon-based filter medium P by the jetted air flow. Since it has a jetting means,
By injecting the high-pressure air flow, the filter 8 containing the granular porous carbon-based filter material P can be cooled, and the temperature rise of the device itself can be suppressed.

By the way, in the above-mentioned embodiment, the dust s is dropped downward from the upper filter 8 arranged at the uppermost stage, but when the present invention is carried out, a predetermined number of filters 8 are simultaneously removed. The dust s can also be dropped down.

That is, the dust remover of the above-mentioned embodiment has the dust discharge part including the dust discharge port 1c at the lower part, and the housing 1 having the intake port 1e and the exhaust port 1b located above the dust discharge part, A filter 8 containing a granular filter material made of granular porous carbon filter material P incorporated in the housing 1 to remove dust, and a granular filter made of granular porous carbon filter material P contained in the container 2. It is provided with an air jetting means comprising a plurality of nozzles 5 for removing dust adhering to the granular filter medium by an air flow jetting the material, and this can be an embodiment of claim 1.

In particular, in this type of embodiment, it is desirable to leave one or more of the filters 8 on the upper stage and remove a plurality of dust on the lower stage with a large amount of dust attached at the same time.

Also in this embodiment, the same effect as the former can be expected.

By the way, the granular filter medium of the above-mentioned embodiment is made of the granular porous carbon filter medium P, but when the present invention is carried out, it is limited to the granular porous carbon filter medium P. It is not limited to the above, and any particulate filter material that is porous and capable of adsorbing impurities may be used. It is preferable that it is porous and capable of adsorbing impurities, and also capable of removing dust and deodorizing, and removing impurities in exhaust gas. However, according to this embodiment, when the high-temperature exhaust gas discharged from the melting furnace passes through the granular porous carbon-based filter material P in the filter 8, the high-temperature exhaust gas and the heat of the particulate porous carbon-based filter material P are removed. Since the particulate porous carbon-based filter medium P is cooled by replacement and cooling and the air for removing dust is used, the temperature rise of the device can be suppressed. Moreover, since the heat resistance temperature of the particulate porous carbon-based filter material P is as high as about 700 ° C., there is an effect that it does not burn even if a high temperature gas passes through it.

Since the filter 8 accommodating the granular porous carbon-based filter material P is divided into multiple stages, when replacing the deteriorated granular porous carbon-based filter material P at regular intervals, It is not necessary to replace the granular porous carbon-based filter material P, and it is sufficient to take out only the filter 8 near the inflow side, which is likely to be partially deteriorated, and replace the granular porous carbon-based filter material P. Moreover, the granular porous carbon-based filter material P that has deteriorated can be easily selected and replaced by adopting multiple stages. As a result, the material loss is reduced, the replacement weight of the granular porous carbon-based filtration material P per time is reduced, the work is facilitated, the time and effort for replacement are shortened, and the cost of the filtration material can be reduced. . Then, it becomes possible to use the granular porous carbon-based filter material P for each classification of the particle diameter.

In the embodiment of the present invention, the dust remover for cooling the high-temperature exhaust gas discharged from the melting furnace has been described. However, when the present invention is carried out, it is needless to say that a severe environment such as a temperature condition is used. It can be used as a dust remover that removes dust contained in general exhaust that is not used under conditions.

Further, the control means of the above-described embodiment sequentially operates from the air ejecting means located at the upper part to the air ejecting means located at the lower part in order to sequentially remove the dust adhering to the granular filter material downward. Although the control circuit CPU for driving each air ejecting means is used, in the case of implementing the present invention, it is sufficient that each air ejecting means can be drive-controlled so as to sequentially remove the dust adhering to the granular filter material downward.

[0063]

As described above, the dust removing device according to the first aspect has the dust discharging portion at the lower portion, and the dust removing member is incorporated in the housing having the intake port and the exhaust port located above the dust discharging portion. The storage container that contains the granular filter material
The particulate filter medium is agitated by the air flow jetted from the air jetting means to remove dust adhering to the particulate filter medium.

Therefore, the dust adhering to the granular filter material in the upper stage is sequentially removed downward, and the dust that has fallen does not stop on the granular filter material but is dropped from a plurality of granular filter materials one after another to collect the dust. Can be housed in a department. In addition, even if the granular filter material contained in the container is deteriorated by being exposed to high temperature, the granular filter material turned into dust due to the deterioration is partially peeled and collected together with the dust. The activity of the filter medium can be maintained. The granular filter material contained in the container has a plurality of air ejecting means for removing dust adhering to the granular filter material by the ejected air flow. Can be cooled, and the temperature rise of the device itself can be suppressed.
Furthermore, dust can be removed with high efficiency.

The dust removing apparatus according to the second aspect of the present invention has a dust discharging portion at the lower portion, and a granular filter material for removing dust incorporated in a housing having an intake port and an exhaust port located above the dust discharging portion. The accommodating container that has been accommodated agitates the particulate filter medium by the air flow ejected from the air ejection means, and removes dust adhering to the granular filter medium. At this time, by the control means, the air ejecting means located at the lower order is operated from the air ejecting means located at the upper order, and the dust adhering to the granular filter medium is forcibly dropped downward and collected.

Therefore, the dust adhering to the granular filter medium is removed, and the dust that has fallen does not stop between the granular filter medium and the filter medium, but is dropped from between the plurality of granular filter mediums or the filter medium to contain the dust. Can be housed in a department. In addition, even if the granular filter material contained in the container is deteriorated by being exposed to high temperature, the granular filter material turned into dust due to the deterioration is partially peeled and collected together with the dust. The activity of the filter medium can be maintained.
The granular filter material contained in the container has a plurality of air ejecting means for removing dust adhering to the granular filter material by the ejected air flow. Can be cooled,
The temperature rise of the device itself can be suppressed.

A dust removing apparatus according to a third aspect of the present invention is such that the granular filter material contained in the plurality of storage containers according to the first or second aspect is heat-exchanged with high temperature exhaust gas to cool and filter the exhaust gas. By using the particulate porous carbon-based filter material for removing dust, the dust removal efficiency and the temperature rise can be efficiently reduced.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a sectional view from the front and an electrical control circuit diagram showing a dust remover according to an embodiment of the present invention.

2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram of a main part configuration and an operating principle of a dust remover according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a main configuration of a container used in the dust removing device according to the embodiment of the present invention.

FIG. 5 is an explanatory view of a main part configuration showing an arrangement state of a wire net of a container used in the dust removing device according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of an operation principle of the dust removing device according to the embodiment of the present invention.

FIG. 7 is a flowchart showing control of the dust removing device according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a state of upper stage dust removal in a control process of the dust remover according to an embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a state of middle-stage dust removal in the control process of the dust remover according to an embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a state of lower-stage dust removal in the control process of the dust removing device according to the embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a dust accumulation state in a control process of the dust remover according to an embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a dust collecting state in a control process of the dust removing apparatus according to the embodiment of the present invention.

FIG. 13 is a sectional view showing a conventional aluminum alloy melting furnace.

[Explanation of symbols]

 1 Housing 1A Dust Storage Section 1c Dust Discharge Port 1d Gate Plate 1e Intake Port 1b Exhaust Port 2 Storage Containers 3a, 3b Wire Mesh 5 Nozzles 8, 8A, 8B, 8C Filter P Granular Porous Carbon Filter Medium (Granular Filter Medium) CPU Control circuit (control means) V1, V2, V3, solenoid valve

Claims (3)

[Claims] 1. A housing having a dust discharge part at a lower part and having an intake port and an exhaust port positioned above the dust discharge part, and a storage container incorporated in the housing and containing a granular filter material for removing dust. A dust remover comprising: an air jetting unit that removes dust adhering to the granular filter medium by an air flow that jets the granular filter medium contained in the container. 2. A housing having a dust discharge part at a lower portion and having an intake port and an exhaust port located above the dust discharge part; and a plurality of housings which are incorporated in the housing and accommodate a granular filter medium for removing dust. A storage container, a plurality of air ejection means corresponding to each storage container that removes dust adhering to the granular filter medium by an air flow that ejects the granular filter medium contained in each of the storage containers, and the above-mentioned upper position Control means for sequentially operating the air ejecting means from the air ejecting means toward the lower portion, and driving each of the air ejecting means so as to sequentially remove dust adhering to the granular filter medium downward. Characteristic dust removal device. 3. The granular filter material contained in the plurality of storage containers is a granular porous carbon-based filter material that exchanges heat with high temperature exhaust gas to cool and filter the exhaust gas to remove dust. The dust remover according to claim 1 or 2.