JP2002136818A - Air cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaning device capable of effectively preventing the diffusion of pollutant at the working space where the diffusion of a pollutant such as dioxins could occur, to ensure the safety of a worker and also to prevent air pollution and to complete a safe hygiene managing system. SOLUTION: The air cleaning device 1 is provided with a casing 2 having an air inlet 21 and an air outlet 22 and provided with an air passage 23 from the air inlet 21 to the air outlet 22 at its inside, pollutant removing means 3, 4 and 5 provided in mid-way of the air passage 23 and a blower 6 provided in mid-way of the air passage 23. The pollutant removing means are constituted of particulate pollutant removing means 3 and 5 and a gaseous pollutant removing means 4. The particulate pollutant removing means are constituted of a bag filter for a primary treatment and a HEPA filter 5 for a secondary treatment. The gaseous pollutant removing means 4 is constituted of activated carbon 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus, and more particularly, to demolition work, overhaul work, and maintenance in a waste incineration facility or the like contaminated with dioxins, dust, dust, and other contaminants. The present invention relates to an air purifying device used in the work space when performing work such as inspection and inspection.

[0002]

2. Description of the Related Art Incineration facilities for waste such as municipal solid waste and industrial waste include incinerators, flue equipment, dust removal equipment, smoke exhaust cooling equipment, smoke cleaning equipment, wastewater treatment equipment, waste heat boilers, and the like. Various types of equipment are contaminated with contaminants such as dioxins, dust, and dust. When dismantling construction of such a waste incineration facility, there is a possibility that contaminants such as dioxins diffuse into the work space and further to the outside with the construction.

In a waste incineration facility, overhaul works, maintenance, inspections, etc. are carried out regularly or irregularly. However, contamination by dioxins, dust, soot and the like as in the incinerator body and the like described above. In the case where work is performed in a place where the work is performed, there is a possibility that dioxins and the like may be diffused.

[0004] Conventionally, the effects of dioxins and the like on the health of workers and the like due to diffusion into and outside the work space have not been sufficiently considered, and there has been no regulation on such effects. Work such as dismantling was performed under natural ventilation or forced ventilation by existing induction fans or industrial fans.

[0005]

However, when performing a work that may cause the diffusion of contaminants such as dioxins, it is not possible to prevent the diffusion of the contaminants, thereby preserving the working environment and preventing air pollution. Of course you need it.
Recently, relevant ministries and agencies have issued a notification on the prevention of health problems caused by dioxins in the dismantling work of waste incineration facilities.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air purifying apparatus capable of effectively preventing the diffusion of contaminants such as dioxins when performing a work in which the contaminants may diffuse into a work space or outside thereof. The purpose is to ensure the safety of workers, prevent air pollution, and enhance the health and safety management system.

[0007]

An air purifying apparatus according to the present invention includes a casing having an air inlet and an air outlet and having an air passage extending from the air inlet to the air outlet provided inside the casing. It is provided with at least one contaminant removing means provided and a blower provided in the middle of the air passage.

In the above apparatus, by operating the blower, air in the working space containing dioxins and other contaminants is introduced from the air inlet into the air passage in the casing, and the air is contaminated. The contaminants in the air are removed by passing through the object removing means. The air thus purified is released to the atmosphere from the air outlet. Therefore, if this device is installed in the work space and operated during the work, it is possible to effectively prevent contaminants such as dioxins from diffusing into the work space and the outside thereof. In addition, since the above-mentioned device is a compact device in which the contaminant removing means and the blower are incorporated in the casing, it is easy to carry into the work place or move in the work place, and is easy to use.

A control panel is usually attached to the casing of the above-mentioned apparatus, and an operator can control the start, stop, output and the like of the blower according to the work situation by using the control panel. I have. In addition, a caster may be provided at the bottom of the casing so that the device can be moved easily and quickly.

In the air cleaning apparatus according to the present invention, the contaminant removing means may be constituted by a particulate contaminant removing means and a gaseous contaminant removing means.

As described above, if the air purifying apparatus is provided with means for removing both particulate contaminants and gaseous contaminants, it is possible to purify air in various work spaces having different contaminant properties. Become.

[0012] The above-mentioned apparatus may include a primary processing bag filter and a secondary processing HEPA filter or charcoal filter as particulate contaminant removing means.

If the two-stage removal treatment is performed by the above means, the removal efficiency of particulate contaminants such as dioxins and dust can be further enhanced. In ordinary equipment, the bag filter is designed and operated to have a filtration speed of 1 to 2 m / min, but the same speed in the device of the present invention is 5 m / min.
min or less.

The above-mentioned apparatus may be provided with activated carbon, activated coke or charcoal filter as a means for removing gaseous pollutants.

[0015] In ordinary equipment, the air passing speed of activated carbon, activated coke or charcoal filter is 0.2 to 0.5.
It is designed and operated to be 4 m / sec, but the same speed in the apparatus of the present invention is set to 1 m / sec or less.

In the air purifying apparatus according to the present invention, one or more of a plurality of modularized and different types of contaminant removing means according to the properties of the contaminant to be removed are provided in the middle of the air passage. May be provided in a removable manner.

As described above, if a plurality of contaminant removing means are modularized and selectively incorporated in the apparatus, a more appropriate contaminant removal method according to the property of the contaminant to be removed is provided. Removal processing can be easily performed, and contaminant removal performance can be further improved.

In the air cleaning device according to the present invention,
Normally, dioxins are 0.6p
g-TEQ / Nm ³ or less, 0.001 mg /
It is designed and operated to be Nm ³ or less.

[0019]

Next, an embodiment of the present invention will be described below with reference to FIGS. In the following description, the up, down, left, and right in FIG. 1 are referred to as up, down, left, and right, and the near side in FIG.

As shown in FIGS. 1 to 3, an air purifying apparatus (1) according to the present invention comprises an air inlet (21) and an air outlet (22).
And a casing (2) having an air passage (23) extending from the air inlet (21) to the air outlet (22), and three contaminants provided in the middle of the air passage (23). Removal means (3)
(4) (5) and a blower (6) provided in the middle of the air passage (23)
And The contaminant removing means is composed of particulate contaminant removing means (3) (5) and gaseous contaminant removing means (4). The particulate contaminant removing means comprises a primary processing bag filter (3) and a secondary processing HEPA filter (5). The gaseous pollutant removing means is made of activated carbon (4).

The casing (2) is in the shape of a rectangular box, and is provided with the air inlet (21) below the left side wall (2A) and the air outlet (22) below the right side wall (2B). ) Is provided. Cylindrical nozzles (211) and (221) are connected to the air inlet (21) and the air outlet (22), respectively. Figures 1 and 2
As shown in the figure, an air inlet pipe (81) is connected to the tip of the inlet nozzle (211) via a butterfly valve (7), and a butterfly valve (7) is connected to the tip of the outlet nozzle (221). The air discharge pipe (82) is connected via the.

The inside of the casing (2) is divided into two right and left sections (A) and (B) by a vertical partition wall (2C).
The two sections (A) and (B) communicate with each other through a communication hole (24) (see FIG. 3) provided at the upper end of the vertical partition (2C). The air passage (23) includes a left compartment (A), a communication hole (24) of a vertical partition (2C), a right compartment (B), and a blower (6 ). As shown in FIG. 3, outriggers (9) are provided at four corners of the bottom of the casing (2) so as to be freely foldable.

The bag filter (3) is arranged in the left section (A) in the casing (2), and as shown in FIG. 3, a plurality of bag filters containing a retainer (not shown) therein. Cloth (31)
Is vertically attached to the edge of the ventilation hole of the horizontal wall (25) for attaching the filter cloth provided near the upper end of the left section (A).

The air cleaning device (1) is provided with a pulse jet device (10) for removing particulate contaminants and the like adhering to the filter cloth (31) of the bag filter (3). The pulse jet device (10) has a header pipe (12) horizontally mounted on the outer surface of the left side wall (2A) of the casing (2), and a compressed air supply pipe (11) connected to the lower portion, and a diaphragm at the left end. Valve (1
3) is connected to the header pipe (12) via the vertical communication pipe (14) with the left end (2A) of the casing (2) except for the left end.
And four pulse pipes (not shown) projecting from the upper end of the left section (A) in the casing (2) and having nozzles (not shown) at positions corresponding to the upper end openings of the filter cloth (31). 15). The number of the pulse pipes (15) is not limited to four, but may be a plurality (about 2 to 10) of other pipes, or may be one in some cases.

As shown in FIG. 3, the HEPA filter (5) is placed on a filter support frame (26) horizontally provided at the center of the height of the right section (B) in the casing (2). ing.

As shown in FIG. 3, the activated carbon (4) is housed in a plurality of cassettes (41), and the cassette (41) containing the activated carbon (4) is placed in the right compartment in the casing (2).
(B) Cassette support frame provided horizontally near the upper end
(27).

The blower (6) has an intake port (61) opened rearward.
And an exhaust fan having an exhaust port (62) opened to the right and connected to the air outlet (22) of the casing (2),
It is arranged at the lower front part of the right section (B) in the casing (2). In a lower portion of the right-side section (B) than the filter support frame (26), a vertical wall which divides a lower half portion of the section into front and rear and has an insertion hole into which an intake port (61) of the blower (6) is inserted. And a guide plate (28) including a front rising inclined wall portion (28B) extending from an upper edge of the portion (28A) and an upper edge of the vertical wall portion (28A) toward a front edge of the filter support frame (26).

The top wall (2D) of the casing (2) is detachable, and through the upper opening formed by this, the inspection inside the casing (2) and the bag filter (3) and the activated carbon (4) The cassette (41) can be detached and replaced. An inspection port with a cover (not shown) is provided on the right side wall (2B) of the casing (2), through which the HEPA filter (5) can be attached / detached / replaced. Top wall (2D) of casing (2)
A viewing window (29) is provided on both left and right sides of the camera. In addition, an inspection port with a lid (not shown) is provided on both left and right sides at the lower end of the front and rear walls (2E) and (2F) of the casing (2),
A viewing window is provided in the lid of each inspection port.

As shown in FIGS. 1 and 2, the above device (1)
Has a filter cloth differential pressure gauge (16), a HEPA filter differential pressure gauge (17), and a control panel (18). The control panel (18)
It is attached to the left side of the casing front wall (2E),
An operation switch for controlling the start, stop and output of the blower (6), and a display unit for displaying measurement data and the like sent from the filter cloth differential pressure gauge (16) and the HEPA filter differential pressure gauge (17) are provided. Have.

The above-described air cleaning device (1) is brought into a work place such as an incinerator main body when dismantling construction of a waste incineration facility, for example. The inlet of the air inlet pipe (81) is located near the scattering source of contaminants such as dioxins. on the other hand,
The outlet of the air discharge pipe (82) may be disposed in the work space, or may be disposed outside the facility if the air discharge pipe (82) has a sufficient length. Then, during the operation, the air in the working space is cleaned by the device (1) by operating the blower (6) of the device (1). Specifically, air containing dioxins and other contaminants scattered during the work is blown from the air inlet (21) through the air inlet pipe (81) by the blower (6) to the air passage in the casing (2). (23). In addition, blower (6)
Output of the bag filter (3) is 5 m / min
Hereinafter, the air passing speed of the activated carbon (4) is set so as to be 1 m / sec or less. The air introduced into the air passage (23) first passes through the bag filter (3), where particulate contaminants such as dioxins and dust contained in the air having a relatively large particle size are separated. Removed. Next, the air passes through the activated carbon (4), where gaseous pollutants contained in the air are adsorbed and removed. In addition, the air is HEPA
After passing through the filter (5), relatively small particle contaminants remaining in the air are separated and removed. The air thus cleaned of contaminants is removed from the air outlet (22).
From the air through an air discharge pipe (82). The above device
According to (1), dioxins are 0.6 pg-TEQ /
Nm ³ or less and dusts are removed to 0.001 mg / Nm ³ or less. Thereby, it is possible to prevent dioxins and the like scattered during the dismantling work from diffusing into the work space or the outside thereof.

The above-described embodiment is merely an example, and the present invention can be, of course, carried out with appropriate modifications without departing from the scope of the present invention described in the appended claims. .

[0032]

According to the air purifying apparatus of the present invention,
It is possible to effectively prevent contaminants such as dioxins from diffusing into the work space or the outside thereof. Therefore, if the above equipment is used for demolition work and overhaul work at waste incineration facilities, etc., it is possible to ensure worker safety, prevent air pollution, and enhance the safety and health management system. Can be done.

Further, since the above-mentioned device is compact, it can be easily brought into the work place or moved in the work place, and is easy to use.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a front view of an air cleaning device.

FIG. 2 is a plan view of the air cleaning device.

FIG. 3 is a partially cutaway perspective view of the air cleaning device.

[Explanation of symbols]

(1): Air purifier (2): Casing (21): Air inlet (22): Air outlet (23): Air passage (3): Bag filter for primary treatment (particulate contaminant removing means) (4 ): Activated carbon (means for removing gaseous contaminants) (5): HEPA filter for secondary treatment (means for removing particulate contaminants) (6): Blower

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichiro Ando 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi Inside Tachibashi Shipbuilding Co., Ltd. (72) Inventor Hirokazu Obata 1-7-7 Minami-Kohoku, Suminoe-ku, Osaka-shi No. 89 Nippon Shipbuilding Co., Ltd. (72) Inventor Sadao Mino 1-7-9 Minami Kohoku, Suminoe-ku, Osaka City Nippon Shipbuilding Co., Ltd. (72) Inventor Yasunori Kawaguchi 5-3-Nishikujo, Konohana-ku, Osaka-shi 28 Large machine engineering Co., Ltd. (72) Inventor Kenji Morioka 5-3-28 Nishikujo, Konohana-ku, Osaka City Large machine engineering F-term (reference) 4C080 AA05 AA09 BB02 CC01 HH05 JJ03 KK08 LL10 MM05 QQ17 4D058 JA04 JA12 JA51 JB04 JB22 JB33 KB11 KC01 KC90 SA20 TA03

Claims (5)

[Claims] A casing having an air inlet and an air outlet and having an air passage extending from the air inlet to the air outlet provided therein; at least one contaminant removing means provided in the middle of the air passage; An air purifier comprising: a blower provided in the middle of an air passage. 2. The air cleaning apparatus according to claim 1, wherein the contaminant removing means comprises a particulate contaminant removing means and a gaseous contaminant removing means. 3. A primary processing bag filter and a secondary processing HEPA filter or charcoal filter are provided as particulate contaminant removing means.
An air purifying apparatus according to item 1. 4. A method for removing gaseous contaminants, comprising: activated carbon;
With activated coke or charcoal filter,
An air purifying apparatus according to claim 1. 5. One or a plurality of modularized and different types of contaminant removing means depending on the nature of the contaminant to be removed is provided detachably in the air passage. An air purifying apparatus according to any one of claims 1 to 4.