JP7132578B1 - Suction device and suction vehicle equipped with the same - Google Patents

Abstract

Kind Code: A1 If a HEPA filter can be provided on the exhaust side of a suction means, powder can be reliably collected and exhausted. was not proposed. A suction device includes a vacuum pump 3, a recovery tank 1, a pump suction side catcher 2 provided on the suction side of the vacuum pump 3, and a pump discharge side catcher 4 provided on the discharge side of the vacuum pump 3. and a HEPA filter 7 provided on the exhaust side of the pump discharge side catcher 4 . The suction device also includes an exhaust switching valve 11 that can switch between exhaust from the HEPA filter 7 and exhaust without using the HEPA filter 7 . [Selection drawing] Fig. 1

Description

Application of Article 30, Paragraph 2 of the Patent Act Website publication date May 25, 2021 (Document 1) Website address https://toplahanta. com/ Website publication date May 25, 2021 (Document 2) Website address https://toplahanta. com/publics/index/1/detail=1/b_id=1/r_id=12#block1-12

TECHNICAL FIELD The present invention relates to a suction wheel and suction device for sludge and powder, and more particularly to a suction wheel and suction device capable of collecting substances discharged from an exhaust port of a vacuum pump.

The incinerated ash transportation system (1) described in Patent Document 1 (the symbols in parentheses are the symbols described in the patent document. The same shall apply hereinafter.) is a sealed container or a closed container ( 3) It is a system to store and transport to. The incineration ash transportation system (1) comprises a storage means (2) that evacuates the inside of the closed container or the closed container (3) and pressure-feeds the incinerated ash to the closed container or the closed container (3), and a storage means ( A transportation means (4) that seals and transports the closed container or closed container (3) containing the incinerated ash according to 2), and the incinerated ash in the closed container or closed container (3) that is transported by the transportation means (4) It consists of a discharge means (5) for discharging from the airtight container or the airtight container (3) using compressed air.

The storage means (2) includes a suction means (21) for evacuating the inside of the closed container or the closed container (3), and a discharge passage (24) for discharging the air sucked by the suction means (21) to the outside. Prepare. The discharge passage (24) is provided with a HEPA (High Efficiency Particulate Air) filter (26a) and a dust removal bag filter (26b).

In the incinerated ash transportation system (1) described in Patent Document 1, the discharge passage (24) is provided with the HEPA filter (26a) and the bag filter for dust removal (26b), so that the closed container or closed container (3) Incineration ash containing harmful substances such as dioxins and dust can be reliably removed from the closed container or the air in the closed container (3) that is sucked when the is vacuumed, and the suction means (21) The sucked air can be purified and discharged to the atmosphere.

The asbestos treatment plant vehicle (11) described in Patent Document 2 includes a suction pump (19) and a suction hose (13) as suction means for sucking waste materials (12) and storing them in a tank (16), and a tank ( A chemical tank (17) and a chemical pump (18) as processing agent supply means for supplying a processing agent composed of an inorganic acid and a fluorine-containing compound to the waste material (12) in 16), and a waste material (12) in the tank (16). ) and the processing agent are mixed and reacted with a stirring motor (4) and a stirring shaft (5).

The tank (16) is provided with a ventilation port with a filter for ventilating the gas in the tank (16), and the filters used in the ventilation port with a filter are a cyclone filter (20), a HEPA filter (21), An activated carbon filter (22) is used.

The dust collection system described in Patent Document 3 includes a first dust collection section (3) and a second dust collection section (4) in front of a vacuum vehicle (2). The second dust collector (4) serves as decontamination means. The second dust collecting section (4) comprises a truck (41), a tank (42), a cyclone filter (43), a bag filter (44), a HEPA filter (45) and a charcoal filter (46). At least have.

In the example of Patent Document 3, the particle size collected by the HEPA filter 45 and the charcoal filter 46 is set to about 0.3 μm or more.

Japanese Unexamined Patent Application Publication No. 2006-273568 JP 2008-253856 A JP 2013-160605 A

In the incinerated ash transportation system (1) described in Patent Document 1, the HEPA filter (26a) was provided on the suction side of the suction means (21).

In the asbestos treatment plant vehicle (11) described in Patent Document 2, the HEPA filter (21) was provided on the suction side of the suction pump (19).

In the dust collection system described in Patent Document 3, the HEPA filter (45) was provided on the suction side of the vacuum vehicle (2).

Thus, in any prior art, the HEPA filter is provided on the suction side of the suction means.

However, there is a high possibility that powder with a large particle size still remains on the suction side of the suction means. Therefore, when the HEPA filter is provided on the suction side of the suction means, the amount of powder collected by the HEPA filter increases, and the frequency of replacement of the HEPA filter increases. Note that the HEPA filter is more expensive than the filter cloth used for the bag filter. Therefore, the lower the replacement frequency of the HEPA filter, the better the cost.

Also, if a HEPA filter could be provided on the exhaust side of the suction means, the powder would be reliably collected and exhausted. However, conventionally, a suction device having a HEPA filter on the discharge side of the suction means has not been proposed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a suction device having a HEPA filter on the discharge side of a suction means and a suction wheel provided with the same.

In order to solve the above problems, the present invention has the following features. The present invention is a suction device capable of sucking sludge by suction with a vacuum pump, comprising a HEPA filter provided on the discharge side of the vacuum pump and a pump suction side catcher provided on the suction side of the vacuum pump. , a pump discharge side catcher provided between the HEPA filter and the discharge side of the vacuum pump, and a recovery tank provided on the suction side of the pump suction side catcher for collecting the sucked sludge. , is exhausted from a HEPA filter .

Preferably, collected matter containing powder can also be sucked by suction by the vacuum pump. Further, a filter catcher provided on the suction side of the pump suction side catcher and a cyclone catcher provided on the suction side of the filter catcher. and

Preferably, the vacuum pump is a liquid ring type vacuum pump, and the liquid in the pump discharge side catcher is circulated in the vacuum pump and used as a cooling liquid for the vacuum pump.

Further, the present invention is a sludge suction device capable of sucking collected matter containing powder by suction with a vacuum pump, comprising a HEPA filter provided on the discharge side of the vacuum pump and a suction of the vacuum pump. A filter catcher provided on the side, a cyclone catcher provided on the suction side of the filter catcher, and a collection tank provided on the suction side of the cyclone catcher for collecting the sucked collected matter, and exhaust from the HEPA filter characterized by being

Preferably, the vacuum pump is a vacuum pump configured so that the cooling liquid is not injected into the inside of the pump from the main piping line.

Further, the present invention is a suction device capable of sucking sludge or powder by suction with a vacuum pump, comprising a HEPA filter provided on the discharge side of the vacuum pump and collecting the sucked sludge or powder. and an exhaust switching valve capable of switching between exhaust from the HEPA filter and exhaust from the exhaust port without passing through the HEPA filter.

Further, the present invention is a suction vehicle equipped with the suction device described above.

According to the present invention, a suction device provided with a HEPA filter is provided on the discharge side of the vacuum pump , so that the powder that can be collected by the HEPA filter is collected, and finally cleansed. air is discharged.

Further, most of the powder is recovered by a pump suction side catcher provided on the suction side of the vacuum pump and a pump discharge side catcher provided on the discharge side of the vacuum pump. Therefore, unrecovered powder arrives at the HEPA filter. Therefore, the powder is not collected only by the HEPA filter, so the burden of collecting the powder on the HEPA filter can be reduced. As a result, the replacement frequency of the HEPA filter can be reduced, and the running cost of the suction device can be reduced.

Furthermore, if a filter catcher provided on the suction side of the pump suction side catcher and a cyclone catcher provided on the suction side of the filter catcher are provided, even if the collected material contains a large amount of powder, the filter catcher After recovering the powder with the cyclone catcher, the remaining powder is collected by the HEPA filter of the final exhaust gas, so that the powder recovery load on the HEPA filter can be reduced. As a result, it is possible to provide a suction device capable of discharging clean air not only for sludge but also for collected materials containing powder.

At this time, when a liquid ring type vacuum pump is used, by circulating the liquid in the pump discharge side catcher in the vacuum pump, it is not necessary to separately prepare a cooling liquid. In this case, although the air in the catcher on the discharge side of the pump is in a vapor state, the HEPA filter does not directly adhere to moisture, so the HEPA filter can collect powder without impairing its function. can.

In the case of a configuration including a filter catcher provided on the suction side of the vacuum pump and a cyclone catcher provided on the suction side of the filter catcher, the collected material with a large amount of powder is collected and the final exhaust HEPA filter is used. Remaining powder can be collected. It is possible to provide a suction device capable of discharging clean air even for collected materials containing a large amount of powder.

At this time, it is possible to use a vacuum pump (a dry vacuum pump) configured so that the cooling liquid is not supplied from the main piping line into the inside of the pump, which facilitates maintenance of the vacuum pump.

By providing an exhaust switching valve that determines whether or not the HEPA filter is passed through, it is possible to avoid using the HEPA filter at construction sites that do not require the use of the HEPA filter, thereby reducing the frequency of replacement of the HEPA filter. can. As a result, the running cost of the suction device can be suppressed.

A suction wheel equipped with the above-described suction device also has the same effect.

These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings.

FIG. 1 is a system diagram of a suction device according to a first embodiment of the present invention. FIG. 2 is a system diagram of a suction device according to a second embodiment of the present invention. FIG. 3A is a plan view of a suction wheel provided with a suction device according to a second embodiment; FIG. 3B is a front view of a suction wheel provided with a suction device according to the second embodiment; FIG. 4 is a system diagram of a suction device according to a third embodiment of the present invention. FIG. 5 is a system diagram of a suction device according to a fourth embodiment of the present invention.

(First embodiment)
In FIG. 1, the suction device according to the first embodiment includes a recovery tank 1, a pump suction side catcher 2, a vacuum pump 3, a pump discharge side catcher 4, a discharge side silencer 5, and a HEPA filter unit 6. , a HEPA filter 7 , load release valves 8 a and 8 b , a suction side silencer 9 and a pump circulating water line 10 .

The suction device according to the first embodiment is mainly used for collecting liquid sludge, but is not limited.

During the suction of the collected material, the load release valves 8a and 8b and the suction switching valve b are closed, and the suction switching valves a and c are opened. As a result, when the vacuum pump 3 is driven, an air flow indicated by black arrows in FIG. 1 is generated, and the collected material can be collected.

When discharging the recovered material, the load release valve 8a and the suction switching valve b are opened, and the load release valve 8b and the suction switching valves a and c are closed. As a result, when the vacuum pump 3 is driven, an air flow indicated by an outline arrow in FIG. 1 is generated, and the collected matter can be discharged.

The recovery tank 1 is equipped with an openable hatch 1a, a suction hose 1b, a discharge pipe 1c, a contact plate 1d, and a float ball 1e (reference numerals are omitted in FIGS. 2, 4 and 5). At the time of recovery, the collected material is sucked from the suction hose 1b and is collected at the bottom of the collection tank 1 by hitting the contact plate 1d. At the time of discharge, the collected material is discharged from the discharge pipe 1c. Collected matter that does not float in the air is collected at the bottom of the collection tank 1 .

The powder floating in the air is sent to the catcher 2 on the suction side of the pump through the recovery pipe. The catcher 2 on the suction side of the pump is a wet scrubber and collects the powder floating in the air. The pump suction side catcher 2 is not limited to a wet scrubber, and may be a dry scrubber or a cyclone catcher.

Powder that has passed through the pump suction side catcher 2 without being absorbed passes through the vacuum pump 3 and is sent to the pump discharge side catcher 4 .

The vacuum pump 3 functions as suction means. The vacuum pump 3 is a liquid ring vacuum pump. Therefore, even if the collected material contains water, it can be collected. A pump circulating water line 10 circulates the liquid in the pump discharge side catcher 4 into the vacuum pump 3 . Since the liquid circulating in the vacuum pump 3 also functions as a cooling liquid for the vacuum pump 3, the liquid in the pump discharge side catcher 4 is gradually warmed, and may exceed 80 degrees, for example.

Powder and the like that have passed through the vacuum pump 3 are sent to and collected by a pump discharge side catcher 4 that also serves as a wet scrubber. Since the liquid in the pump discharge side catcher 4 is heated and evaporated, the pump discharge side catcher 4 is replenished with liquid from a liquid tank (not shown).

Gas is discharged from the exhaust port of the pump discharge side catcher 4 through the discharge side silencer 5 .

A HEPA filter unit 6 is connected to the discharge side silencer 5 . A HEPA filter 7 is built in the HEPA filter unit 6 .

Therefore, the final exhaust gas passes through the HEPA filter 7 and is discharged to the outside.

The HEPA filter is defined by the JIS standard as "an air filter with a particle collection rate of 99.97% or more for particles with a particle size of 0.3 μm at a rated air flow rate and an initial pressure loss of 245 Pa or less." It is stipulated that there is

Therefore, the powders and the like remaining in the exhaust gas are collected by the HEPA filter 7, so that clean air is finally discharged from the suction device.

By the way, as described above, since the liquid in the pump discharge side catcher 4 is warmed, the gas in the catcher (the gas containing the uncollected powder) may be vaporized. . However, since the HEPA filter 7 itself is not directly exposed to the water droplets, the collection is basically possible without degrading the performance of the HEPA filter 7 .

As described above, according to the first embodiment, since the HEPA filter 7 can be provided on the discharge side (exhaust side) of the suction means, it is possible to reliably collect powder and the like, and clean gas can be collected. can be exhausted.

In addition, by providing a pump discharge side catcher 4 between the discharge side of the suction means and the HEPA filter 7, it is possible to collect powder before exhausting to the HEPA filter 7 side. Therefore, it is possible to reduce the burden of collecting powders and the like, and as a result, it is possible to reduce the replacement frequency of the HEPA filter 7 . If the replacement frequency of the HEPA filter 7 is reduced, the running cost of the suction device can be suppressed.

If the suction side silencer 9 can incorporate a HEPA filter, it is possible for the suction side silencer 9 to collect powder around the construction site during suction.

(Second embodiment)
In FIG. 2, portions having the same functions as those of the suction device according to the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted. Also, FIG. 3 shows an arrangement when the functions shown in FIG. 2 are actually installed in a vehicle.

The suction device according to the second embodiment is mainly used for collecting liquid sludge, but is not limited.

Unlike the suction device according to the first embodiment, the suction device according to the second embodiment shown in FIG.

A HEPA filter unit 6 is attached to one side of the exhaust switching valve 11 . The other side of the exhaust switching valve 11 is provided with an exhaust port 11a as it is without providing a filter or the like.

When it is necessary to exhaust air through the HEPA filter 7 for construction reasons, the exhaust switching valve 11 on the HEPA filter unit 6 side is opened and the other exhaust switching valve 11 is closed. On the other hand, when it is not necessary to exhaust air through the HEPA filter 7, the exhaust switching valve 11 on the HEPA filter unit 6 side is closed and the other exhaust switching valve 11 is opened.

As shown in FIG. 3, the exhaust switching valve 11 is provided in the upper part of the suction device, and the exhaust port 11a is preferably directed upward to exhaust the gas.

In this way, by switching whether to use the HEPA filter 7 or not, it becomes unnecessary to perform collection by the HEPA filter 7 at construction sites where the use of the HEPA filter 7 is not required. It is possible to reduce the load and reduce the replacement frequency. As a result, the running cost of the suction device can be suppressed.

(Third embodiment)
In FIG. 4, portions having the same functions as those of the suction devices according to the first and second embodiments are denoted by the same reference numerals, and descriptions thereof are omitted. In FIG. 4, the suction device according to the third embodiment includes a cyclone catcher 12 and a filter catcher 13 on the suction side of the pump suction side catcher 2 of the suction device according to the first embodiment. The filter catcher 13 is a catcher containing an air filter (filter cloth) such as a bag filter.

The suction device according to the third embodiment is applied to recovery of recovered materials including sludge and powder, but is not limited thereto.

Further, in the third embodiment, the illustration is different from that of the vacuum pump 3 of the first embodiment, and two pump circulating water lines 10 are provided. However, it is conceptually the same as the first embodiment in that a liquid ring vacuum pump is used as a suction means.

During the suction of the collected material, the load release valves 8a and 8b and the suction switching valve b are closed, and the suction switching valves a, c and d or e are opened. In addition, d is opened and e is closed at the time of sludge collection. During powder recovery, d is closed and e is opened. As a result, when the vacuum pump 3 is driven, an air flow indicated by a solid black arrow in FIG.

In addition, in the filter catcher 13 of FIG. 4, a black arrow whose tip is partially painted white is illustrated, which means that the arrow passes through the air filter. , illustrates the flow of air during suction. Further, since the filter catcher 13 is a back filter, a black arrow is shown in FIG. 4 for dropping powder attached to the filter cloth downward.

When discharging the recovered material, the load release valve 8a and the suction switching valve b are opened, and the load release valve 8b and the suction switching valves a and c are closed. As a result, when the vacuum pump 3 is driven, an air flow indicated by an outline arrow in FIG. 4 is generated, and the collected matter can be discharged.

A cyclone catcher 12 collects powder that could not be collected in the collection tank 1 . Further, the powder that could not be collected by the cyclone catcher 12 is collected by the filter catcher 13. After that, the gas containing the remaining powder is sent to the pump suction side catcher 2 .

Therefore, most of the powder is collected by the cyclone catcher 12, the filter catcher 13, the pump suction side catcher 2, and the pump discharge side catcher 4. Therefore, the suction device of the third embodiment can collect only sludge. It is also suitable for collecting collected materials containing powder. In addition, since most of the powder is recovered before the HEPA filter 7, the recovery load on the HEPA filter 7 is reduced, so the replacement frequency of the HEPA filter 7 can be reduced. As a result, it is possible to reduce the running cost of the suction device.

(Fourth embodiment)
In FIG. 5, portions having the same functions as those of the suction devices according to the first, second, and third embodiments are denoted by the same reference numerals, and descriptions thereof are omitted.

In FIG. 5, the suction device according to the fourth embodiment includes a pump suction side catcher 2 provided on the suction side of the vacuum pump 3 of the suction device according to the third embodiment, and a suction side catcher 2 of the same vacuum pump 3. The configuration is such that the pump discharge side catcher 4 that was provided in 1 is not provided. Further, the vacuum pump 3 used in the suction device according to the fourth embodiment is configured so that the cooling liquid for the pump is not supplied from the main piping line. Here, a vacuum pump having a configuration in which the cooling liquid of the pump is not injected from the main piping line into the inside of the pump is referred to as a dry vacuum pump (dry vacuum pump).

The suction device according to the fourth embodiment is used for suction of powder whose suction load is smaller than that of sludge, but is not limited thereto.

Opening and closing of the valves during collection and discharge in the suction device of the fourth embodiment are the same as in the first embodiment.

In the fourth embodiment, when collecting powder, a cyclone catcher 12 and a filter catcher 13 are provided on the suction side of the vacuum pump 3, and most of the powder can be collected there. Therefore, since the collection load on the HEPA filter 7 is reduced, the replacement frequency of the HEPA filter 7 can be reduced. As a result, it is possible to reduce the running cost of the suction device.

The invention is also a suction wheel comprising a suction device as described above.

Although the present invention has been described in detail, the foregoing description is merely illustrative of the invention in all respects and is not intended to limit its scope. It goes without saying that various modifications and variations can be made without departing from the scope of the invention. Constituent elements of the invention disclosed in this specification shall be established independently as independent inventions. Inventions in which each constituent element is combined in any combination method are also included in the present invention.

INDUSTRIAL APPLICATION This invention is a suction device and a suction vehicle provided with the same, and is industrially applicable.

1 collection tank 2 pump suction side catcher 3 vacuum pump (suction means)
4 Pump discharge side catcher 5 Discharge side silencer 6 HEPA filter unit 7 HEPA filter 8a, 8b Load release valve 9 Suction side silencer 10 Pump circulating water line 11 Exhaust switching valve 11a Exhaust port 12 Cyclone catcher 13 Filter catcher a, b, c, d, e Suction switching valve

Claims (7)

A suction device capable of sucking sludge by suction with a vacuum pump,
a HEPA filter provided on the discharge side of the vacuum pump ;
a pump suction side catcher provided on the suction side of the vacuum pump;
a pump discharge side catcher provided between the HEPA filter and the discharge side of the vacuum pump ;
a collection tank provided on the suction side of the pump suction side catcher for collecting the sucked sludge,
A suction device, wherein the air is exhausted from the HEPA filter . Collected material containing powder can also be sucked by suction by the vacuum pump,
moreover,
a filter catcher provided on the suction side of the pump suction side catcher;
A cyclone catcher provided on the suction side of the filter catcher ,
2. The suction device according to claim 1 , wherein the recovery tank is provided on the suction side of the cyclone catcher . The vacuum pump is a liquid ring vacuum pump,
3. The suction device according to claim 1, wherein the liquid in said pump discharge side catcher is circulated in said vacuum pump and used as a cooling liquid for said vacuum pump. A sludge suction device capable of sucking collected matter containing powder by suction with a vacuum pump,
a HEPA filter provided on the discharge side of the vacuum pump ;
a filter catcher provided on the suction side of the vacuum pump;
a cyclone catcher provided on the suction side of the filter catcher ;
a recovery tank provided on the suction side of the cyclone catcher for recovering the sucked collected matter,
A suction device, wherein the air is exhausted from the HEPA filter . 5. The suction device according to claim 4, wherein the vacuum pump is a vacuum pump configured so that the cooling liquid is not introduced into the inside of the pump from the main piping line. A suction device capable of sucking sludge or powder by suction with a vacuum pump,
a HEPA filter provided on the discharge side of the vacuum pump;
a recovery tank for recovering the sucked sludge or powder ;
The suction device, comprising an exhaust switching valve capable of switching between exhaust from the HEPA filter and exhaust from an exhaust port without passing through the HEPA filter. A suction wheel equipped with the suction device according to any one of claims 1 to 6.

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