JP6726134B2 - How to replace the filter of the dust collector - Google Patents

Description

The present invention relates to a dust collector and a filter replacement method for the dust collector, and more particularly to a dust collector and a filter replacement method for the filter that can be safely replaced and have improved maintainability.

In copper smelting, first, copper concentrate containing copper, iron, sulfur, etc. is charged into a flash furnace together with normal temperature and high oxygen air, and the copper concentrate is subjected to an oxidation reaction to generate a copper grade of about 65 by the oxidation heat of the ore itself. % Kawa (mat) and slag composed of iron oxide, silicic acid, etc. are melted and separated. The mat is then sent to a converter, where it is simultaneously oxidised to oxidize the mat to give high copper grade (eg about 99%) blister copper before being sent to a refining furnace. In the refining furnace, butane gas is blown as a reducing agent, whereby oxygen contained in the crude copper is removed and the copper quality is improved (for example, 99.3%). Further, the blister copper is sent to a casting machine and cast into an anode (anode plate) for electrolytic refining. The cast anodes are placed alternately with the cathodes (cathode plates) of stainless steel plates in the electrolytic bath in which the copper sulfate solution is stored, and a direct current is passed between both electrodes. As a result, the copper content in the anode is eluted into the copper sulfate solution and electrodeposited on the cathode. The cathode on which electrolytic copper is electrodeposited on both sides by applying a direct current for several days is withdrawn from the electrolytic cell, and the electrolytic copper is peeled off from the cathode (stainless steel plate) to obtain electrolytic copper of the final product (for example, copper grade 99.99). %) will be shipped as. Gases containing various components (for example, sulfur, carbon monoxide, carbon dioxide, large amounts of dust, etc.) are generated from converters and refining furnaces, so harmful substances are removed by a dust collector and then released into the atmosphere. .. In addition, electrolytic slime is generated during electrolytic refining. This electrolytic slime is used as a raw material for selenium production.

Further, selenium (Se ⁴⁺ , Se ⁶⁺ ) is also contained in coal and the like used as fuel for boilers and the like, and is also present in combustion exhaust gas. These are removed by using a wet desulfurization device or the like arranged in the latter stage of the dust collector, but it is said that removal of Se ⁶⁺ is difficult. Therefore, in the selenium collector in the boiler flue gas treatment facility shown in Patent Document 1, a recirculation line for recirculating a part of the combustion exhaust gas that has passed through the electrostatic precipitator to the inlet side of the electrostatic precipitator is further provided, A part of the collected ash is introduced into the recirculation line to reduce the selenium concentration in the desulfurization effluent and to comply with environmental regulations without using complicated and expensive equipment.

JP-A-2002-239410

By the way, the inventors of the present invention focused on consolidating a plurality of small dust collectors scattered in a factory into one large dust collector from the viewpoint of reduction of maintenance load, and for the dust collector, a filter (= filter cloth) was used. ) Was examined for the side removal type in which the mounting and replacement of the filter is performed from the side inspection port and the top removal type in which the mounting and replacement of the filter is performed from the upper exhaust chamber side. As a result, the following problems emerged during the filter replacement work.
(1) When a side removal type dust collector is used, it is necessary for the worker to enter the dust collector for cleaning, and there is a risk that the worker is inevitably exposed to harmful substances such as selenium. Further, there is a risk of causing an accident such as a worker falling into the hopper when corrosion or deterioration occurs in the dust collector.
(2) When using a top removal type dust collector, there is a risk that harmful substances will be scattered outdoors.

Therefore, the present invention has been made in view of the above problems, and can reduce the exposure of harmful substances to safely perform work such as filter replacement, and improve the maintainability by allowing entry from the side. It is an object of the present invention to provide a dust collector and a filter replacement method thereof.

In order to solve the above problems, the present invention according to claim 1 provides a first dust collecting chamber and a second dust collecting chamber which can be sealed, and the first dust collecting chamber and the second dust collecting chamber, respectively. The arranged filter, the first dust collecting chamber and the second dust collecting chamber are communicated in parallel with each other, and air containing dust is introduced through the introduction duct to the first dust collecting chamber and the first dust collecting chamber. A first duct to be introduced into each of the two dust collecting chambers, and the first dust collecting chamber and the second dust collecting chamber are communicated in parallel with each other, and the air after collecting dust by the filter is supplied. A second duct that discharges to the outside through an exhaust duct, and a suction unit that is disposed in the exhaust duct and is capable of sucking the first dust collection chamber and the second dust collection chamber, respectively. A first closing plate disposed between the dust collection chamber and the suction means and at a position that does not affect the communication state between the second dust collection chamber and the suction means; A second closing plate disposed between the second dust collecting chamber and the suction means and at a position that does not affect the communication state between the first dust collecting chamber and the suction means. a comprises Ru dust collector filter replacement method, the first closure plate between the first dust collecting chamber or the second side of the dust collecting chamber and the suction means for filter replacement of the dust collecting chamber Or a step of closing with the second closing plate, and sucking air in the dust collecting chamber on the opposite side of the first dust collecting chamber or the second dust collecting chamber from the side where the filter is replaced by the suction means. To make the dust collection chamber on the filter replacement side negative pressure, and to collect a filter from the dust collection chamber on the filter replacement side in a negative pressure state, and to install a new filter for replacement. A method of exchanging a filter for a dust collector, the method including:

In order to solve the above problems, the present invention according to claim 2 is the method of replacing a filter of a dust collector according to claim 1 , wherein the filters are provided in the first dust collecting chamber and the second dust collecting chamber respectively. Characterized by being arranged in rows.

In order to solve the above-mentioned problems, the present invention according to claim 3 is the method of replacing a filter of a dust collector according to claim 1 or 2 , wherein the first dust collecting chamber and the second dust collecting chamber are replaced by the filter. Is a side removal type that is performed from the side, so that the first dust collection chamber and the second dust collection chamber can be replaced by an operator without entering the room. A plurality of doors are provided at various intervals.

In order to solve the above-mentioned problems, the present invention according to claim 4 is the method of replacing a filter of a dust collector according to any one of claims 1 to 3 , further comprising closing the introduction duct with a shielding plate. And

In order to solve the above problems, the present invention according to claim 5 provides the filter replacement method for the dust collector according to any one of claims 1 to 4 , wherein the first dust collection chamber or the second dust collection is performed. It is characterized in that it further comprises a step of preliminarily covering and curing the surroundings so that dust in the dust collecting chamber on the side where the filter is replaced in the chamber is not scattered to the outside.

The present invention of claim 6 for solving the above problems is the dust collector filter replacement method according to any one of claims 1 to 5, replacement of the filter, the first dust collecting chamber and The second dust collecting chamber is characterized in that it is carried out through a plurality of doors provided at intervals so that an operator can replace the filter arranged inside without entering the second dust collecting chamber.

ADVANTAGE OF THE INVENTION According to the dust collector which concerns on invention, the side dust collector which replaces a filter by restricting the air flow path by the closing plate (the 1st closing plate or the 2nd closing plate) of the duct which connects a dust collection chamber in parallel. Since the air in the room can be sucked through the dust collection chamber on the opposite side, it is possible to prevent the harmful substances from scattering outside and to safely perform the filter replacement work. There is an effect that the risk of exposure can be reduced and the maintainability can be improved.

Further, according to the filter exchange method of the dust collector according to the invention, the dust in the dust collection chamber on the side where the filter is replaced is covered and cured so as not to scatter to the outside, and the first dust collection chamber and the second collection chamber are protected. After connecting the dust chamber with the duct and closing the dust collection chamber on the filter replacement side from the outside, suck the air in the dust collection chamber where the filter is not replaced to make the dust collection chamber on the filter replacement side negative pressure. The procedure for recovering the filter in the dust collection chamber and replacing it with a new filter is performed for all dust collection chambers, so it is possible to prevent scattering of harmful substances to the outside and perform work such as filter replacement. There is an effect that it can be performed safely, the risk of exposing a worker to harmful substances can be reduced, and the maintainability can be improved.

It is a top view which shows schematic structure of the dust collector which concerns on this invention. It is a left view which shows schematic structure of the dust collector of FIG. It is a top view which shows the detailed structure of the dust collector which concerns on this invention. It is a right view of the dust collector shown in FIG. It is a flowchart which shows the replacement method of the filter which concerns on this invention.

Next, a dust collector and a filter replacement method thereof according to the present invention will be described in detail below with reference to the drawings. First, an embodiment of the dust collector according to the present invention will be described. FIG. 1 is a plan view showing a schematic configuration of a dust collector according to the present invention.

[Schematic configuration of dust collector]
The dust collector 1 is roughly provided with a first dust collection chamber 2 and a second dust collection chamber 3 which can be hermetically sealed, and a first dust collection chamber 2 and a second dust collection chamber 3, respectively. The plurality of filters 4, 4 arranged, the first dust collecting chamber 2 and the second dust collecting chamber 3 are communicated in parallel with each other, and air containing dust is introduced through the introduction duct 21 into the first dust collecting chamber 2. The first duct 5 introduced into the dust collecting chamber 2 and the second dust collecting chamber 3, respectively, the first dust collecting chamber 2 and the second dust collecting chamber 3 are connected in parallel to each other, and the filters 4, 4 are provided. The second duct 6 for discharging the air after the dust has been collected by the exhaust duct 23 to the outside of the room, and the second duct 6 disposed in the exhaust duct 23 and in the first dust collection chamber 2 and the second dust collection chamber. A position that does not affect the communication state between the second dust collection chamber 3 and the fan 7, and between the fan 7 as a suction unit that sucks the inside of the third dust collection chamber 3 and the first dust collection chamber 2 and the fan 7. Between the first closing plate 9 and the second dust collection chamber 3 and the fan 7, and at a position that does not affect the communication state between the first dust collection chamber 2 and the suction means. The second closing plate 10 is arranged.

The first dust collecting chamber 2 and the second dust collecting chamber 3 are basically of the side removal type, and both have the same structure here, but the number and size of filters to be arranged are different. May be a combination of. The first dust collecting chamber 2 and the second dust collecting chamber 3 have the same configuration and are formed in a substantially rectangular shape in a plane and are arranged in parallel. The first dust collecting chamber 2 is provided with doors 11a and 11b which are opened and closed for replacement of filters 4 and 4 and internal inspection described later, and the second dust collecting chamber 3 is also provided with the filters 4 and 4. There are provided doors 12a and 12b that can be opened and closed for the replacement and internal inspection. That is, a plurality of doors 12a, 12a are provided on one side surface of the first dust collecting chamber 2, and a plurality of doors 12b, 12b are provided on the other side surface of the first dust collecting chamber 2. 3 is similarly configured. In the present embodiment, the replacement work can be performed on the three filters 4 and 4 for one door 11a, 11b, 12a and 12b without the worker entering the inside of the first dust collection 2 and the second dust collection chamber 3. It is said that. The doors 11a, 11b, 12a, 12b are provided with one door for each of the filters 4, 4 arranged in the first dust collection 2 and the second dust collection chamber 3. It can also be configured to.

As shown in FIGS. 1 and 2, it is easy to enter the doors 11a, 11b, 12a, 12b and replace the filter 4 around the first dust collecting chamber 2 and the second dust collecting chamber 3. For this purpose, the deck 20 is provided at a predetermined height position.

Here, a shield plate 8 can be provided in the introduction duct 21 in order to control the introduction of air into the first dust collection chamber 2 and the second dust collection chamber 3. The shield plate 8 is an introduction duct connected to the first duct 5 for sending dust-containing air, for example, exhaust gas generated in a combustion furnace or the like to the first dust collecting chamber 2 and the second dust collecting chamber 3. It is inserted vertically or horizontally in 21. By inserting the shield plate 8, the introduction duct 27 and the first dust collecting chamber 2 and the second dust collecting chamber 3 are shut off from each other. In addition, the first closing plate 9 is inserted into the second duct 6 between the exhaust duct 23 and the first dust collecting chamber 2 so that the first dust collecting chamber 2 and the fan 7 communicate with each other. The second closing plate 10 is inserted into the second duct 6 between the exhaust duct 23 and the second dust collecting chamber 3 so that the second dust collecting chamber 3 and the fan can be shut off. It is used when the communication with 7 is cut off. When the negative pressure in the first dust collecting chamber 2 and the second dust collecting chamber 3 is insufficient, the shielding plate 8 is provided as necessary to provide the first dust collecting chamber 2 and the second dust collecting chamber 2. The pressure reduction in the dust chamber 3 can be increased.

[Detailed configuration of dust collector]
Next, details of the configuration of the dust collector 1 will be described. FIG. 3 is a plan view showing a detailed configuration of the dust collector according to the present invention (a part thereof is shown in a sectional view), and FIG. 4 is a right side view thereof. As shown in FIGS. 2 and 4, the first dust collection chamber 2 and the second dust collection chamber 3 are installed on a deck 20 supported by a plurality of columns 13, 13. The columns 13 and 13 are surrounded by a slate plate 14 for preventing dust from scattering when collecting from the first dust collecting chamber 2 and the second dust collecting chamber 3, and are not shown. Workers can enter and exit through the doorway. A plurality of filters 4 and 4 are arranged in two rows inside the first dust collecting chamber 2 and the second dust collecting chamber 3. The filters 4 and 4 are pleated filters formed in a cylindrical shape. Then, circular metal end frames are attached to both sides of the filter 4. Further, the filter medium is “PET+PTFE membrane”, but is not limited to this. The filters 4 and 4 are arranged in two rows because the filters 4 and 4 arranged inside are provided with doors 11a and 11b provided on both sides of the first dust collecting chamber 2 and the second dust collecting chamber 3, respectively. This is so that the worker can replace the room 12a, 12b without entering the room.

As shown in FIG. 4, hoppers 15c and 15d for collecting dust in the dust collection chamber 3 are installed below the second dust collection chamber 3, and valves 16c and 16d are attached to the lower ends of the hoppers 15c and 15d, respectively. .. Similarly, hoppers 15a and 15b for collecting dust in the first dust collecting chamber 2 are installed below the first dust collecting chamber 2, and valves 16a and 16b are attached to the lower ends of the hoppers 15a and 15b, respectively ( (See FIGS. 2 and 4). Then, collection containers 17a to 17d (see FIG. 2) for collecting dust in the first dust collection chamber 2 and the second dust collection chamber 3 are installed between the valves 16a to 16d and the floor surface. There is a space available. Further, on the floor surface, a compressor 18 for introducing the exhaust gas discharged from the combustion furnace or the like into the first dust collecting chamber 2 and the second dust collecting chamber 3, and for controlling the compressor 18 and the fan 7 are provided. A control panel 19 is installed.

As shown in FIG. 4, the introduction duct 21 is connected to the lower side of the first dust collection chamber 2 and the second dust collection chamber 3 and is connected to the first dust collection chamber 2 and the second dust collection chamber 3. It is connected to the second duct 6 from the upper part on the opposite side. The exhaust gas introduced from the lower side of the first dust collection chamber 2 and the second dust collection chamber 3 by the introduction duct 21 is collected by the filters 4 and 4, and then from the second duct 6 through the exhaust duct 23. Is exhausted. The exhaust gas exhausted by the fan 7 is discharged into the atmosphere while preventing noise by the silencer 22.

[Dust collector operation]
Next, the operation of the dust collector 1 according to the present invention will be described. First, the valves 16a to 16d are closed, and the filters 4 and 4 are mounted in the first dust collecting chamber 2 and the second dust collecting chamber 3, respectively. Then, the first closing plate 9 and the second closing plate 10 are pulled out from the second duct 6, respectively. In this state, the compressor 18 is operated to start the operation of the fan 7 and the compressor 18. As a result, the exhaust gas to be collected is introduced from the introduction duct 21 into the first dust collection chamber 2 and the second dust collection chamber 3 and passes through the first dust collection chamber 2 and the second dust collection chamber 3. When this is done, dust is collected by the filters 4 and 4. The exhaust gas that has passed through the first dust collecting chamber 2 and the second dust collecting chamber 3 is sucked into the second duct 6 by the negative pressure of the fan 7, and is discharged to the atmosphere via the silencer 22 via the exhaust duct 23. It

As the operation continues, the filters 4 and 4 gradually become clogged and the dust collection efficiency decreases, so compressed air is jetted to the filters 4 and 4 periodically or as needed. Then, operations such as filter cleaning for removing the powder adhering to the surface and dusting off the powder adhering to the surfaces of the filters 4 and 4 are carried out. The dust dropped from the filters 4 and 4 is collected in the collecting containers 17a to 17d installed below the valves 16a to 16d in advance. Further, when the use time of the filters 4 and 4 has elapsed, the air volume is reduced and the suction force is weakened even if cleaning or cleaning is performed. At this stage, the filters 4 and 4 need to be replaced. The method of replacing the filter will be described below.

[How to replace the filter]
FIG. 5 is a flowchart showing a method of replacing the filter 4. When the filter 4 is replaced, first, compartment curing is performed in which the second dust collecting chamber 3 and the work area around the second dust collecting chamber 3 are surrounded by a sheet or the like (step S1). This is to prevent the dust from scattering from the second dust collecting chamber 3 to the outside in advance. Next, the second closing plate 10 is inserted into the second duct 6 to shut off between the second duct 6 and the second dust collecting chamber 3 (step S2). As a result, the second dust collection chamber 3, the first duct 5, the first dust collection chamber 2, the second duct 6, the exhaust duct 23, and the fan 7 are sequentially routed through the second dust collection chamber 3. The inside is gradually sucked and the inside of the second dust collecting chamber 3 becomes negative pressure (step S3). The air volume of the fan 7 is appropriately adjusted via the control panel 19. The inside of the second dust collecting chamber 3 can be further depressurized by inserting the shielding plate 8 into a predetermined position of the introduction duct 21 and closing the introduction duct 21.

When the pressure in the second dust collecting chamber 3 becomes negative, the door (for example, the door 12a in FIG. 1) corresponding to the filter 4 to be replaced in the side removing type second dust collecting chamber 3 is opened to open the filter 4 Are exchanged (step S4). Since the three filters 4 can be replaced for one door 12a without the worker having to enter the second dust collecting chamber 3, the worker is exposed to harmful substances when the filters 4 are replaced. The risk of is reduced. After replacing the other doors 12a, 12a for all the filters 4, 4 on the one side in the second dust collecting chamber 3 that are to be replaced while sequentially opening and closing the other doors 12a, 12a, the other doors 12b, 12b are replaced. Also, the filters 4 and 4 on the opposite side are exchanged while sequentially opening and closing. After the replacement, all the doors 12a and 12b are surely closed.

Then, when the replacement of the filters 4 and 4 in the second dust collecting chamber 3 is completed, this time, the replacement work of the filters 4 and 4 is performed in the first dust collecting chamber 2 in the same procedure as described above. That is, the first dust collecting chamber 2 and the work area around the first dust collecting chamber 2 are surrounded by a sheet or the like to perform partition curing, and the second closing plate 10 is removed to insert the first closing plate 9 into the second duct 6. Then, the second duct 6 and the first dust collecting chamber 2 are shut off from each other. As a result, the first dust collection chamber 2, the first duct 5, the second dust collection chamber 3, the second duct 6, the exhaust duct 23, and the fan 7 are sequentially routed to the first dust collection chamber 2. The inside of the first dust collecting chamber 2 is gradually sucked and the inside of the first dust collecting chamber 2 becomes negative pressure, and the filters 4 and 4 in the first dust collecting chamber 2 are replaced while opening and closing the doors 11a and 11b. It is carried out in the same manner as in the case of 3. The inside of the first dust collecting chamber 2 can be further decompressed by inserting the shielding plate 8 into a predetermined position of the introduction duct 21 and closing the introduction duct 21. In addition, either the first dust collection chamber 2 or the second dust collection chamber 3 may be performed first.

According to the dust collector and the filter exchange method of the dust collector described above, the dust in the dust collection chamber on the filter exchange side does not scatter out of the room, so that the safety at the time of filter exchange can be improved. Further, since the filters 4 and 4 are arranged in two rows in the first dust collecting chamber 2 and the second dust collecting chamber 3, respectively, and the doors 11a, 11b, 12a and 12b are provided so as to correspond to them, work is performed. The filter can be replaced without a person having to enter the dust collecting chamber.

Although the two dust collecting chambers are arranged in parallel in the above-described embodiment, the present invention is not limited to this, and another dust collecting chamber may be arranged in parallel.

As described above, the preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the specific embodiments, and within the scope of the gist of the present invention described in the claims, It goes without saying that various modifications and changes are possible.

1 Dust collector 2 1st dust collecting chamber 3 2nd dust collecting chamber 4 Filter 5 1st duct 6 2nd duct 7 Fan 8 Shielding plate 9 1st closing plate 10 2nd closing plates 11a, 11b Door 12a , 12b Door 13 Pillar 14 Slate plate 15a to 15d Hopper 16a to 16d Valve 17a to 17d Recovery container 18 Compressor 19 Control panel 20 Deck 21 Introduction duct 22 Silencer 23 Exhaust duct

Claims (6)

A sealable first dust collection chamber and a second dust collection chamber;
Filters respectively arranged in the first dust collection chamber and the second dust collection chamber,
The first dust collecting chamber and the second dust collecting chamber are connected to each other in parallel, and air containing dust is introduced into the first dust collecting chamber and the second dust collecting chamber through an introduction duct. The first duct to introduce,
A second duct that communicates the first dust collection chamber and the second dust collection chamber in parallel with each other, and exhausts the air after collecting dust by the filter to the outside through an exhaust duct,
Suction means arranged in the exhaust duct and capable of respectively sucking the first dust collecting chamber and the second dust collecting chamber,
A first closing plate disposed between the first dust collection chamber and the suction means and at a position that does not affect the communication state between the second dust collection chamber and the suction means. When,
A second closing plate disposed between the second dust collection chamber and the suction means and at a position that does not affect the communication state between the first dust collection chamber and the suction means. When,
A dust collector filter exchange method of Ru with a,
A step of closing the first dust collecting chamber or the second dust collecting chamber between the dust collecting chamber on the filter exchange side and the suction means by the first closing plate or the second closing plate. When,
The suction means sucks the air in the dust collection chamber on the opposite side of the first dust collection chamber or the second dust collection chamber to the side where the filter is to be replaced so that the dust collection chamber on the side where the filter is replaced is negative. Pressure process,
A step of collecting the filter from the dust collection chamber on the side where the filter is replaced in a negative pressure state and mounting a new filter for replacement,
A filter replacement method for a dust collector, comprising: The filter replacement method for the dust collector according to claim 1 ,
The filter replacement method for a dust collector , wherein the filters are arranged in two rows in the first dust collection chamber and the second dust collection chamber, respectively. The filter replacement method for a dust collector according to claim 1 or 2 ,
The first dust collecting chamber and the second dust collecting chamber are side removal type in which the filter is replaced from the side, and the first dust collecting chamber and the second dust collecting chamber are A filter replacement method for a dust collector , characterized in that a plurality of doors are provided at intervals so that the filter disposed inside can be replaced without entering the inside. The filter replacement method for a dust collector according to any one of claims 1 to 3 ,
Furthermore, the filter exchange method of the dust collector characterized in that the introduction duct is closed by a shielding plate . The filter replacement method for a dust collector according to any one of claims 1 to 4 ,
Of the first dust collecting chamber or the second dust collecting chamber, the dust in the dust collecting chamber on the side where the filter is to be replaced is further covered with a pre-curing step so as not to scatter to the outside. A characteristic dust collector filter replacement method. The filter replacement method for a dust collector according to any one of claims 1 to 5 ,
The replacement of the filter is
Through a plurality of doors provided at intervals such that it can effect an exchange of the said filter first dust collecting chamber and the operator in the second dust collecting chamber disposed therein without going into the room A method of exchanging a filter for a dust collector, which is characterized in that

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