KR102415773B1 - Air purifier for tunnels and underground roadways - Google Patents

Abstract

The present invention relates to an air purifier for an underground roadway and a tunnel to collect exhaust gases and the likes. More specifically, a pre-treatment filter means (10), an electric dust collecting means (20), an axial flow fan means (30), and a cleaning water supply and wastewater purification means (50) for purifying cleaning water for cleaning the pre-treatment filter means and the electric dust collecting means are installed in a bypass or ventilation passage (5) formed in an underground roadway or a tunnel (2). The axial flow fan means (30) includes right and left fans (31, 31') installed in parallel to be driven and control air volume independently. Radial nozzles (15) installed at the front and rear of the pre-treatment filter means (10) spray water. Wind velocity of inhaled air is reduced through on-off control and air volume control of the right and left fans, and fine particulates like exhaust gas in the inhaled air, and harmful acid gases, such as NO_X, CO, and SO_X are collected to be water-soluble through water spray. Accordingly, the present invention secures visibility in the tunnel and improves environment inside and outside the tunnel more effectively.

Description

Air purifier for tunnels and underground roadways

The present invention relates to an air purification system for collecting soot other than soot for road underpasses and tunnels, and more particularly, while passing soot inside a tunnel through a bypass or ventilation passageway, ultrafine particles such as soot, as well as NO _X , CO, It relates to an air purification system other than soot collecting for road underpasses and tunnels that collects noxious gases such as _SOx , secures visibility of tunnels, and improves the environment inside and outside the tunnel.

In general, road underpasses and tunnels refer to tunnels formed by drilling holes in the basement of mountains or downtown areas for the purpose of vehicle passage.

In particular, the air in these road underpasses and tunnels is highly polluted not only by fine dust but also by soot (SPM) and various harmful substances contained in vehicle exhaust gas. The degree of pollution of the air inside and at the tunnel exit by soot or harmful gas generated from diesel vehicles was even more serious.

Such contamination of the air inside the tunnel has a problem in that the visibility distance in the tunnel is lowered, which interferes with the safe driving of vehicle drivers, as well as worsens and aggravates the environment around the tunnel and outside the tunnel, thereby causing various civil complaints.

In order to solve the problem of air pollution in the double tunnel, a jet fan was installed inside the tunnel to ventilate the air inside the tunnel. That is, a plurality of jet fans having the same blowing direction as the vehicle passage direction are installed on the ceiling of the upper and lower tunnels, and polluted air inside the tunnel is discharged to the outside of the tunnel by the blowing action of the jet fans. It had been ventilated inside.

However, in the conventional ventilation method, since the polluted air inside the tunnel is discharged to the outside of the tunnel in an untreated state, the environment inside the tunnel is improved, but there is a problem in that environmental pollution around the tunnel is aggravated and environmental complaints are generated.

In order to solve the problems of the conventional tunnel ventilation system as described above, a 'tunnel pollutant complex purification system' of Patent Application No. 10-2005-0074863 has been disclosed. In order to directly purify the air inside the tunnel, a bypass tunnel was formed in the tunnel so that polluted air inside the tunnel was introduced and purified and then discharged.

That is, the polluted air introduced into the bypass tunnel by the suction fan is purified by a dust collector and an air purifier, and the air purifier is formed along the longitudinal direction of the bypass tunnel so that the air that has passed through the dust collector is introduced. lower passageway; a plurality of cell beds in which activated carbon for purifying the air that has passed through the dust collector is disposed; a filter bed formed on an upper portion of the lower passage and in which the plurality of cell beds are disposed; an upper passage formed above the filter bed through which air passing through the filter is discharged; a front blocking wall formed at one end of the dust collecting device side of the upper passage to prevent air passing through the dust collecting device from flowing into the upper passage; and a rear blocking wall formed at one end of the air suction fan side of the lower passage to prevent the air introduced into the lower passage from being discharged. Thus, the air that has passed through the dust collector is introduced into the lower passage of the air purifier, passes through the activated carbon, and is discharged to the air intake fan through the upper passage of the air purifier for purification.

However, in the above-mentioned conventional purification system, the structure of the air purification device installed inside the bypass tunnel is complicated, the installation space is large, the operating cost is very high in the air purification process, and the purification efficiency sharply drops as foreign substances are accumulated. There was a problem that a lot of manpower and cost were required to do this.

Above all, in terms of long-term operation, it is possible to purify foreign substances in the form of ultra-fine particles to some extent, but the purification treatment of harmful gases such as NO _X , CO and SO _X contained in polluted air is difficult due to installation space and economic cost. There was a problem of basic performance that not only was limited, but also did not maximize the effect of improving environmental pollution for a long time.

On the other hand, in addition to the above-described bypass tunnel method, in Patent Application No. 10-2014-0129582, 'Tunnel exit installation type tunnel air purification system for vehicles' installs an air purification facility outside the tunnel and provides an intake means at the tunnel exit, so that the polluted air inside the tunnel is was sucked in at the exit of the tunnel, purified, and then released into the atmosphere. There were non-economic problems such as becoming

Registered Patent No. 10-1965067 (March 27, 2019) Registered Patent No. 10-0686643 (February 16, 2007) Registered Patent No. 10-0634048 (October 09, 2006)

The present invention was invented to solve the problems of overall performance and uneconomical characteristics of the prior art, and while passing the soot inside the tunnel through the bypass or ventilation passage, fine particles (PM10 or less) and ultrafine particles such as soot Separately collects particles (SPM) as well as noxious gases such as NO _X , CO and SO _X , but minimizes initial investment and operating costs only with the existing particulate matter installation area to secure the visible distance of the tunnel, and to improve the environment inside and outside the tunnel The purpose is to make it better and better.

In particular, it effectively collects harmful gases through a simple structure and operation without a separate dedicated facility for the treatment of harmful gases in the bypass or ventilation passages, while providing economic feasibility for initial investment and maintenance and efficiency that enables long-term performance maintenance. Its purpose is to provide excellent quality.

The present invention provides a pre-treatment filter means for filtering some large particles of foreign substances contained in intake air in a bypass or ventilation passage formed in an underpass or tunnel of a road, but washing and using the washing water at regular intervals, and the pre-treatment filter means Electrostatic precipitation means for filtering ultra-fine particles contained in the air that has passed through, but washing with washing water, and an axial flow for sucking and discharging the air inside the road underpass and tunnel through bypass and ventilation passages a blower means, and a cleaning supply and cleaning sewage purification means for cleaning and purifying the pre-treatment filter means and the electric dust collecting means; The axial flow blower means is configured to drive and control the air volume by installing the left and right blowers in parallel at the outlet of the bypass and ventilation passage, respectively, and installing a radial nozzle in at least one place in front and behind the pre-treatment filter means It is characterized in that it is configured to spray water mist, and to absorb and collect harmful gaseous gaseous substances in the intake air by water mist with water solubility while lowering the wind speed of the intake air by controlling the on and off beats of the left and right blowers and the air volume.

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According to the present invention, the radial nozzle is characterized in that it is installed in the center of the front and rear of the pre-treatment filter means to radially spray the water mist evenly at a constant pressure.

According to the present invention, as some water particles are scattered during the water mist of the pre-treatment filter, in the case of the electric dust collecting means, the dust collecting block and the dust collecting unit are made of stainless material, and in the case of the axial flow blower means for controlling the air volume, the number control or the variable pitch method It is characterized in that it is configured to control the wind speed of the incoming air by applying the

According to the present invention, the washing water supply and washing effluent purification means; A washing water storage tank for supplying washing water and water mist of the pre-treatment filter means and washing water of the electric dust collecting means, a first sewage pit for collecting the waste water used as the washing water and water mist of the pre-treatment filter means, and the electrostatic precipitation A second sewage pit for collecting the sewage used as the washing water of the means, and a sewage tank for storing the sewage from the first and second sewage pits are configured to supply the filter aid stored in the filter aid tank to the sewage tank, and the It is characterized in that it is composed of a pressure filter that separates and discharges treated water and dewatering cake that can be discharged by transferring the sewage from the sewage tank and pressurizing it with a pressure filter.

According to the present invention, the water mist operation time of the pre-treatment filter unit for the collection of harmful gases in the air is characterized in that the operation time can be gradually increased according to the washing water tank capacity of the cleaning and purification means of the electric dust collection facility. .

The present invention purifies the pretreatment filter means, the electric dust collecting means, the axial flow blower means, and the washing water for washing the pretreatment filter means and the electric dust collecting means in the bypass or ventilation passages formed in the road underpasses and tunnels. Installed as a means for supplying washing water and purifying washing sewage for The axial flow blower means installs the left and right blowers in parallel to control the driving, respectively, and sprays water mist from the radial nozzles installed in front and behind the pre-treatment filter means to control the wind speed of the intake air by on/off or individual air volume control of the left and right blowers. By water spraying while keeping it low, it captures not only ultrafine particles such as soot in the inhaled air but also acidic harmful gases such as NO _X , CO and SO _X in aqueous solution to secure the visibility of the tunnel and to improve the environment inside and outside the tunnel It has an improving effect.

In particular, it has excellent economic efficiency and efficiency because harmful gases are captured by a simple structure without increasing the motor power of the axial flow blower without a dedicated facility for the treatment of harmful gases.

1 is a perspective view showing a road underpass and a tunnel of the present invention.
Figure 2 is a plan view of the system of the present invention installed in the bypass or ventilation passageway.
3 is a block diagram showing the pre-treatment filter means, the electric dust collection means, the cleaning supply and the cleaning sewage purification means of the present invention.
4 to 6 are conceptual views showing the configuration of a facility to which the present invention is applied.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The air purification system for collecting soot other than soot for road underpasses and tunnels of the present invention forms a bypass or ventilation passageway 5 on the exit side of the road underpass and tunnel 2 as shown in FIGS. 1 to 6, , By installing the soot collection system 100 of the present invention on the bypass or ventilation passage 5, ultrafine particles such as soot contained in the air discharged from the tunnel, as well as NO _X , CO, SO _X It is made to collect and remove harmful gases such as, etc., and then discharge to the outside.

That is, the soot collection system 100 of the present invention is a pretreatment filter means 10, an electric dust collecting means 20, an axial flow blower means 30, and the pretreatment filter means and the electric dust collecting means to clean and purify the washing water. It consists of a cleaning supply and cleaning waste water purification means 50 for

The pre-filter means 10 is configured to filter large particles of foreign substances contained in the intake air by installing a pre-filter.

And the pre-treatment filter means 10 is configured to maintain filtration efficiency by regularly washing the filter by washing and drying the filter by spraying washing water. In this case, the cleaning time of the filter is performed every 240 hours, and it is preferable to configure the inspection and maintenance for removing foreign substances to be performed at least once a month.

The electric dust collecting means 20 is configured to collect ultrafine particles such as soot included in the air that has passed through the pre-filtering means. The electric dust collecting means is composed of a general-purpose electric dust collecting equipment.

In addition, the electric dust collecting means 20 is also configured to maintain dust collection efficiency by periodically washing and drying by spraying washing water once every 12 hours based on the dust collecting operation standard.

The axial blower means 30 bypasses the blower that sucks and discharges the air inside the tunnel through the bypass and ventilation passage 5 while rotationally driven by the driving means and the outlet of the ventilation passage 5 ( 5a), but instead of installing a single blower with a large structure as in the prior art, a plurality of blowers with a small structure, preferably installing the left and right blowers 31 and 31' as shown in the drawing, operate the left and right blowers simultaneously It is configured to control the driving and air volume, respectively, such as operating only one of the left and right blowers.

The axial blower means 30 controls the wind speed and volume of the air sucked and discharged into the bypass and ventilation passage 5 by driving and controlling the left and right blowers 31 and 31 ′, respectively, but the left and right blowers When (31) and (31') are simultaneously operated, the wind speed passing through the pre-filter means (10) is about 2.5 m/s or less, and by turning off one of the left and right blowers (31, 31'), harmful gas In the case of collecting , the wind speed passing through the pre-filter means 10 is halved to about 1.25 m/s or less.

In addition, by installing a radial nozzle 15 in the center at least one place in front and behind the pre-treatment filter means 10, the nozzle 15 radially sprays ^the water mist, It is configured to spray with a certain amount of pressure.

That is, in order to collect and reduce the concentration of harmful gases in the tunnel rather than general soot collection, the left and right blowers 31 and 31' of the axial flow blower means 30 are turned on and off while passing through the pretreatment filter means 10. It reduces the wind speed and sprays the water mist radially from the front or rear of the pre-treatment filter 10, so particulate matter in the air sucked into the bypass and ventilation passage 5 by the low wind speed and water mist as well as NO _X , Since gaseous substances of harmful gases such as CO and SO _X are effectively collided and absorbed in the water mist and collected, it is configured to excellently purify the inlet air.

The washing supply and washing waste water purification means 50 includes a washing water storage tank 51 for supplying washing water and water mist of the pre-treatment filter unit 10, and washing water of the electric dust collecting unit 20, and the pre-treatment filter unit A first sewage pit 52 for collecting the washing water and the sewage used for water mist, a second sewage pit 53 for collecting the sewage used as the washing water of the electric dust collecting means, and the first and second sewage water A sewage tank 54 for storing the sewage in the pit is configured, the filter aid stored in the filter aid tank 56 is supplied to the sewage tank, mixed and mixed, and the sewage from the sewage tank is transported to the pressurized filter 55. It is configured so that the treated water and the dehydrated cake are separated and discharged by pressurizing in.

And a drying screw compressor 60 for supplying dry air for drying treatment after washing the pre-treatment filter means 10 and the electric dust collecting means 20 and an air storage tank for temporarily storing the air of the drying screw compressor (65) is further provided and constituted.

In addition, the system of the present invention provides ventilation while turning on and off the electric dust collecting means 20, the left and right blowers 31 and 31 ', the cleaning supply and cleaning waste water purification means 50, the drying means, etc. according to a set time, It will be operated while automatically controlling the filtration, dust collection, washing and water treatment operations.

Next, we will look at the operation and operation of the present invention configured as described above.

First, in the process of discharging the air inside the road underpass and the tunnel 2 to the exit side, it is sucked into the bypass or ventilation passage 5 inside the tunnel and discharged to the outside through the collection process by the soot collection system 100 will do it..

That is, when both the left and right blowers 31 and 31 ′ installed in the outlet 5a of the bypass or ventilation passage 5 are operated, the wind speed is 2.5 m through the bypass or ventilation passage 5 . The underpass and tunnel air is introduced into the pre-treatment filter 10 at about /s or less.

In this way, the air introduced into the bypass or ventilation passage 5 is filtered by the pre-filter of the pre-filter means 10 to filter out foreign substances of large particles contained in the intake air, and is pre-treated by the electric dust collecting means 20 . Ultrafine particles such as soot contained in the intake air that has passed through the filter means are collected and discharged at a passing wind speed of 9 m/s or more, and then discharged to the outside of the tunnel.

As described above, as the filtration process of the pretreatment filter means 10 and the dust collection process of the electric dust collecting means 20 continue, the filtration efficiency and the dust collection efficiency decrease. As such, the pretreatment filter means 10 and the electric dust collecting means ( 20), the performance of the pre-treatment filter means 10 and the electric dust collection means 20 through the cleaning process of the pre-treatment filter means 10 and the electric dust collection means 20 every time the operation time of 240 hours and 12 hours have elapsed, respectively. will keep

This is by supplying the washing water from the washing water storage tank 51 to the pre-treatment filter means 10 and the electric dust collecting means 20 by operating the pump to wash the filter and the electric dust collecting means of the pre-treatment filter means, and the air storage tank 65 ) is supplied as compressed air dried by a drying screw compressor to dry the electric dust collecting means 20 and used.

On the other hand, when the wind speed passing through the pretreatment filter means 10 of the bypass or ventilation passage 5 by operating both the left and right blowers 31 and 31 ′ as described above is about 2.5 m/s or less, particles in the air Although the material can be filtered, it is difficult to effectively capture gaseous substances of harmful gases such as NO _X , CO and SO _X , so the measured value of the concentration of harmful gases such as NO _X , CO and SO _X is high It is to lower the wind speed passing through the pretreatment filter means 10 of the ground, the bypass or the ventilation passage 5 and collect the gaseous substances of harmful gases such as NO _X , CO and SO _X by water mist in a water-soluble solution. .

To explain this in more detail, since any one of the left and right blowers 31 and 31' is turned off to operate only one blower, it passes through the pre-treatment filter means 10 of the bypass or ventilation passage 5 . The wind speed is allowed to flow in about 1.25 m/s or less, and at this time, the electric dust collecting means 20 stops the operation.

In addition, since the sluice gate is radially sprayed from the radial nozzle 15 centrally installed in the front and rear of the pre-treatment filter means 10, particulate matter in the inlet air passing at low wind speed as well as NO _X , CO, SO _X The gaseous substances of harmful gases such as water mist collide with the pre-treatment filter media at low wind speed by water mist and are absorbed by water, so that the inlet air is excellently purified and discharged.

In addition, when it is detected that the air inside the tunnel contains a large amount of harmful gases such as NO _X , CO, SO _X , etc., only one of the left and right blowers 31 and 31 ′ is operated, but in order to collect harmful gases with higher efficiency When the air volume is lowered by adjusting the inverter, blade rotor angle or damper, etc., the wind speed passing through the pre-treatment filter means 10 is _lowered . Since gaseous substances of acidic harmful gases such as , CO, and SO _X are captured with higher efficiency, the inlet air is more excellently purified and discharged.

As such, the sewage in a state in which the sluice part sprayed from the radial nozzle 15 collects harmful gaseous substances in the inlet air and the sewage used for cleaning the pre-treatment filter means 10 and the electric dust collecting means 20 are the first and second After being collected in the sewage pits 52 and 53 and collected in the sewage tank 54, the filter aid stored in the filter aid tank 56 is supplied, mixed and mixed, and this is pressurized in the pressure filter 55 This is to separate and discharge the treated water and the dehydrated cake.

Therefore, the present invention sucks the tunnel air by the left and right blowers 31 and 31' of the bypass or ventilation passage 5 formed on the entrance side of the road underpass and the tunnel 2, and the pre-treatment filter means 10 ), but discharged to the outside through the dust collection process by the electric dust collecting means 20, the acidic harmful gases such as NO _X , CO, SO _X contained in the intake air are routed to the bypass or ventilation passage 5 It reduces the wind speed of the incoming air and collects and treats it in a water-soluble manner by contact with the sluice part sprayed from the radial nozzles 15 installed before and after the pre-treatment filter means, so that the visibility of the tunnel is secured, inside and outside the tunnel. It will greatly improve the environment of

2: Road Underpass and Tunnel 5: Bypass or Ventilation Passage
10: pretreatment filter means 15: radial nozzle
20: electric dust collection means 30: axial flow blower means
31,31': left and right blowers 50: cleaning supply and cleaning sewage purification means
51: washing water storage tank 52: first sewage pit
53: second sewage pit 54: sewage tank
55: pressure filter

Claims (4)

Pre-treatment filter means (10) that filters some large particles of foreign substances contained in the intake air in the bypass or ventilation passage (5) formed in road underpasses and tunnels, but is washed with washing water at regular intervals;
An electric dust collecting means 20 that filters ultra-fine particles contained in the air that has passed through the pre-treatment filter means, but washes and dries them with washing water and uses them;
Axial flow blower means (30) for sucking and discharging the air inside the road underpass and tunnel through the bypass and ventilation passage (5);
In the air purification system for collecting soot for road underpasses and tunnels constituting the cleaning supply and cleaning sewage purification means 50 for processing the cleaning and purification of the pre-treatment filter means and the electric dust collection means,
The axial blower means 30 installs the left and right blowers 31 and 31' in parallel at the outlet 5a of the bypass and ventilation passage 5 to control the wind speed of the inlet air by on/off driving and air volume control, respectively. configured to adjust
The pre-treatment filter means 10 installs a radial nozzle 15 at a central position in at least one of the front and rear parts to absorb and collect the gaseous substances of the harmful gas in the intake air with water solubility while spraying the water mist radially from the center. An air purification system that collects soot for road underpasses and tunnels, characterized in that it is composed of
delete delete The method of claim 1,
The cleaning supply and cleaning waste water purification means 50 is;
A washing water storage tank 51 for supplying washing water and water mist of the pre-treatment filter means 10, and washing water of the electric dust collecting means 20;
a first sewage pit 52 for collecting the washing water of the pre-treatment filter means and the sewage used as water mist;
A second wastewater pit 53 for collecting wastewater used as washing water of the electric dust collecting means and a wastewater tank 54 for storing wastewater from the first and second wastewater pits are configured, and the filtration aid tank is placed in the wastewater tank A road underpass and tunnel characterized in that it is configured to separate and discharge treated water and dewatering cake by supplying the filter aid stored in (56), transferring the sewage from the sewage tank and pressurizing it with a pressure filter (55) An air purification system that collects soot and other solvents.

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