KR101923502B1 - Method For Purifying Waste Gas Ann Purification System Using The Method - Google Patents

Abstract

The present invention relates to a waste gas purifying method and a waste gas purifying system which can remove all of dust, oil, foul odors, and white lead contained in waste gas. The method removes oil and foul odors by using a preinstalled purification facility including: a main treatment tank uprightly installed to treat waste gas supplied from below to discharge the waste gas upwards, and provided with a flue arranged on an upper portion thereof; a treatment water storage tank installed on a lower portion of the main treatment tank; spray devices which are installed on two or three places in the main treatment tank in a longitudinal direction thereof, and spray cleaning water downwards; a filter body of a packing form installed between the spray devices to adsorb dust contained in waste gas; and a cleaning water supply unit to supply cleaning water to the spray devices. The waste gas purifying method comprises: a step of cutting an upper end of the main treatment tank to open an upper portion; a step of connecting an additional treatment tank to the upper end of the main treatment tank; and a step of connecting a first flue to an upper end of the additional treatment tank. An additional filter body for removing oil and foul odors is installed in the additional treatment tank, and can remove oil and foul odors.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for purifying an exhaust gas,

The present invention relates to a harmful substance purification system, and more particularly, to a method for removing dust, oil, odor, and white smoke contained in an exhaust gas, and an exhaust gas purification system therefor.

Exhaust gases are inevitably discharged from various industrial facilities such as petrochemical companies, paint companies, and food processing companies. Exhaust gases often contain volatile organic compounds (VOCs) and various harmful substances.

As environmental regulations have become more severe and citizen consciousness has increased, the emission of environmentally harmful substances has greatly decreased in recent years. However, there is no harmful substance at all. In particular, white smoke is generally not a hazardous substance, but it is often misunderstood as an abominable substance for emotional reasons. So there has been an effort to remove the white smoke.

Methods for removing organic compounds (VOCs) include combustion oxidation techniques, adsorption techniques, and biochemical treatment techniques. Korean Patent Application No. 10-2008-0078753 is an example thereof.

Korean Patent Application No. 10-2009-0133377 proposes a flue gas reservoir capable of increasing the amount of condensed water that is phase-converted from water vapor and collected. The apparatus for removing white smoke includes a supply unit for supplying a fluid containing water vapor, a device body connected to the supply unit and through which a fluid containing steam is introduced, The apparatus main body preferably includes a liquid reservoir disposed at a rear end of the ejection unit on the flow path of the fluid for growing droplets generated from the water vapor contained in the fluid, Respectively.

Various devices for removing harmful substances are currently used according to the properties of the conventional exhaust gas. However, in order to use all of them, the factory site must be secured to a certain extent. For example, a large plant site is required because facilities for removing dust, facilities for removing odors, and facilities for filtering oil are separately operated in separate treatment tanks. That is, the area occupied by each of the detailed treatment facilities is arranged on a plane. In order to have all these kinds of equipments, it is natural that not only a lot of factory sites are required but also a lot of cost is required when the facilities are installed.

There are also existing industrial facilities with large and small exhaust gas treatment devices. However, these are generally dust and gaseous materials, which are not enough to treat oil or white smoke. This is because they were not installed for the first time. As environmental regulations become more stringent, existing regulations can not meet new regulations. Therefore, business owners have to dispose of existing facilities and introduce new ones, which is too costly to do so, and is facing great difficulty in difficult economic conditions.

Korean Patent Application No. 10-2008-0078753 Korean Patent Application No. 10-2009-0133377

It is an object of the present invention to overcome the above problems and to provide a purification system capable of removing dust, oil, odor, and white smoke by intensive use of detailed techniques for specific operations. More specifically, a purification system for eliminating dust, oil, odor gas, and white smoke contained in the exhaust gas, which can maximize the space utilization and reduce the construction cost of the system by collectively installing a plurality of purification facilities in a minimum space System.

It is another object of the present invention to provide a method for enhancing and reinforcing a function of a facility by expanding or reinforcing a facility that has been used in a workplace.

The above-

This is to remove dust and gas contained in the exhaust gas discharged from an industrial site.

A main processing tank installed upright so as to process the exhaust gas supplied from the lower part and to discharge the exhaust gas in an upward direction, A treated water storage tank installed below the main treatment tank; A spray device installed at two to three places along the height direction in the main treatment tank and spraying washing water in a downward direction; A packing type filter disposed between the spray devices for adsorbing dust contained in the exhaust gas; And a cleaning water supply unit for supplying cleaning water to the spray device, the method comprising the steps of:

Cutting the upper end of the main processing tank to open the upper portion;

Connecting an additional treatment tank to an upper end of the main treatment tank;

And connecting the first flue to the top of the additional treatment tank;

Wherein the additional treatment tank is provided with an oil and odor removing additional filter body for removing oil and odor, and an exhaust gas purifying method for removing oil and white smoke.

According to another aspect of the present invention, there is provided a method for manufacturing a semiconductor device,

And supplying the exhaust gas discharged from the first flue to the white smoke processing apparatus to remove white smoke.

Another object of the present invention is to provide:

A main processing tank for removing dust and gas contained in the exhaust gas discharged from an industrial site, the main processing tank being installed upright so as to process the exhaust gas supplied from below and to discharge the exhaust gas upward; A treated water storage tank installed below the main treatment tank; A spray device installed at two to three places along the height direction in the main treatment tank and spraying washing water in a downward direction; A packing type filter disposed between the spray devices for adsorbing dust contained in the exhaust gas; A main purifier including a rinse water supply unit for supplying rinse water to the spray device;

A main processing tank provided at an upper portion of the main processing tank to remove oil and odor contained in the exhaust gas,

An additional treatment tank extended from an upper end of the main treatment tank;

An additional filter element for removing the oil odor installed in the additional treatment tank;

And a first flue installed at the top of the additional treatment tank;

And the additional filter body is a GAC filter. Further, a further differential pressure gauge is further provided in the additional treatment tank so that a signal is generated when the pressure load is over the set value by the additional filter body, so that the GAC filter can be informed to be replaced.

According to another aspect of the present invention, a white smoke processing apparatus may further be connected to the first flue.

Wherein the white smoke treatment apparatus comprises a heat exchanger having a second flue installed at an upper portion thereof and a blower for introducing external air into the heat exchanger, And a duct for supplying gas to the second flue of the heat exchanger.

According to the present invention, there is provided a method for improving a purifying function by using a wet purifying device installed in an industrial site so that the exhaust gas can be purified and discharged, and a purifying system by the method are provided. According to this method and the purification system, the exhaust gas can be purified to a regulated range without using a large cost, and various costs due to the disposal of existing facilities can be saved, thereby providing a more economical technology.

According to the present invention, there is provided a system capable of treating dust, gas, oil, odor, and white smoke.

1 is a configuration diagram of an exhaust gas purifying apparatus according to the prior art.
2 is a configuration diagram of a main purifier of an exhaust gas purifying system according to an embodiment of the present invention.
3 is an overall configuration diagram of an exhaust gas purifying system according to an embodiment of the present invention.
4 is a sectional view of an additional treatment tank of the exhaust gas purifying system according to the embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying FIGS. 1 to 4 at the same time.

In describing the present invention, an exhaust gas purifying apparatus according to the prior art is an essential component, so that the conventional exhaust purifying apparatus will be described first. 1 is a configuration diagram of an exhaust gas purifying apparatus according to the prior art.

The main purifying section (1) removes dust and gaseous substances contained in the exhaust gas supplied from the exhaust gas supply pipe (2). Of course, even in the main purification section 1, the oil and odor can be removed, but some of them are struck. Therefore, new regulations require additional functions to remove oil and odors.

The main purifying section 1 uses a wet purifying method and includes a main processing tank 3, spray devices 9, 11 and 13, and filter elements 15, 17 and 19. The main treatment tank 3 is for removing dust and gas contained in the exhaust gas discharged from an industrial site and is installed upright so that the exhaust gas supplied from the bottom can be treated and discharged in the upward direction.

The treated water storage tank 7 is installed at the lower part of the main treatment tank 3 so as to receive and store the water falling from the main treatment tank 3.

(9, 11, 13) for spraying the washing water in the downward direction are installed in two to three places in the main treatment tank (3) along the height direction thereof. According to the drawings, the spray devices 9, 11, and 13 are installed in three places, and thus the first, second and third spray devices 9, 11, and 13 are formed from the bottom. Each of the spray devices 9, 11, and 13 includes a spray tube provided so as to cross the main treatment tank 3 in a transverse direction, a nozzle provided in a downward direction along the extending direction of the spray tube, And a cleaning water supply unit for supplying the cleaning water. The rinse water supply section includes a rinse water supply pipe (57) and branch pipes (21, 23, 25).

The rinse water supply section may include a circulation system capable of purifying and then reusing the water contained in the process water storage tank (7). The circulation pump (61) and the circulation pipe (59) are included in the system for circulating the washing water. The oil that floats above the process water storage tank (7) can be removed by the oil collection means. The water used as washing water is recovered and used repeatedly, but the deficiency can be supplied from the water source. A drain pipe (31) is installed in the process water storage tank (7) so that the wastewater can be drained.

The main filter body 15, 17, 19 for adsorbing the particulate matter in the exhaust gas passing through the spray devices 9, 11, 13 and the upper part of the main treatment tank 3 can be provided. Packing of a configuration for extending the contact area with the exhaust gas can be used by enlarging the surface area of all or a part of the main filter body. There are various types of packing that are offered on the market. Although three filter bodies may all use the same packing, different types of packing may be used. The packing must adsorb dust and clean or replace after a certain period of time. The packing is usually formed by stacking a plurality of unit packings in several layers and is also called a pall ring in the environmental field.

The configuration described above is similar or similar to a wet-type exhaust gas purifier widely installed in existing industrial sites. In the present invention, this facility is used almost as it is, and an additional treatment unit 35 is further provided at the upper end of the main treatment tank 3. The additional treatment unit 35 is installed through an additional treatment tank 37 and the additional treatment tank 37 is cylindrical in shape with the same diameter as the main treatment tank 3. [ An additional filter body 43 for removing oil and odors is installed inside the additional treatment tank 37. At the upper end of the additional treatment tank 37, a first flue 41 for discharging the purified exhaust gas is provided.

According to an embodiment of the present invention, the additional filter element 43 may include an additional filter (for example, a GAC filter). Hereinafter, the configuration of the additional treatment tank 37 will be described mainly with reference to FIG.

The additional filter element 43 has a structure in which the unit filters 43 'are laminated in two layers. The lower layer is a glass fiber filter 432 made of a glass fiber material and the upper layer is a carbon filter (431). They are effective in removing water containing oil in the exhaust gas passing through because they have a good water absorption rate.

"의 형태로 설치된다. 즉 사각판체 형태로 된 단위필터(431,432)를 "

" 형태로 연결함으로써 배기가스와의 접촉면적을 늘리고, 흡착된 유,수분이 경사면을 타고 흘러내릴 수 있도록 하는 구성을 가진다. 경사면을 타고 흘러내린 유,수분은 드레인관(46)을 통해 외부로 배출되며, 유분은 별도로 수분과 분리되어 수거된다. According to the embodiment of the present invention, as shown in Fig. 4, the additional filter element 43 is a "

The unit filters 431 and 432 in the form of a rectangular plate are referred to as "

", So that the contact area with the exhaust gas is increased and the adsorbed oil and water can flow down along the inclined surface. The oil and water flowing down the slope surface are discharged to the outside through the drain pipe 46 And the oil is separated separately from moisture.

The unit filters 431 and 432 may be connected to each other by a filler 433 such as silicon or urethane to maintain a fixed shape, or they may be fixed by making and fitting a frame.

The lower portion of the additional filter body 45 may be provided with a water separating device 45 for allowing the gas coming from the lower portion to pass upward and allowing water and moisture falling from the upper portion to flow to one side. The nautical water separating device 45 is installed at an upper portion of the through hole of the perforated plate 452 and has a plurality of through holes 452 formed in a sloped manner so as to allow exhaust gas to pass therethrough, Loop < / RTI >

Meanwhile, the purifying system of the present invention may further include denitrification depending on the embodiment. The oil and the washing water discharged through the drain are separated from each other so that the oil is supplied to the waste oil storage tank through the oil recovery pipe and the washing water can be supplied to the washing water tank. Further, an oil separator may be further used in the main treatment tank 3 to the additional treatment tank 37.

 The method of oil separation can be varied and one of them can be selected. According to an embodiment of the present invention, a demister and / or a mist eliminator may be used as the oil separator.

According to the embodiment of the present invention, the additional treatment tank 37 is further provided with a differential pressure gauge 47 for generating a signal when the pressure load exceeds the set value. The differential pressure gauge 47 can measure the pressure difference between the front and rear ends of the additional filter member 43 and inform the user to replace the additional filter member 43 when the pressure difference becomes large, that is, when the load becomes large.

The additional treatment tank 37 may be provided with a see-through window for seeing the inside thereof, and a door 371 which can be opened or closed to replace the additional filter body 43 by a cartridge type may be provided.

The exhaust gas thus treated through various processes is discharged in a state in which the temperature is lowered to a considerable degree (for example, 50 to 60 ° C) and in a state in which water is excessively accumulated, thereby producing white smoke. The white plume phenomenon is a phenomenon in which when the exhaust gas containing moisture is mixed with the atmosphere and diffused, the temperature is lowered, the water vapor in the exhaust gas becomes a dew point or less, .

According to another embodiment of the present invention, a white smoke processing apparatus 33 is further included as shown in Fig. The white smoke processing apparatus 33 is connected to the first flue 41 of the additional processing section 35 and is a facility for removing white smoke from the exhaust gas discharged therefrom.

There are water cooling method, reheating method, air cooling method, demister, etc. as means for eliminating the white smoke phenomenon, but the present invention uses water cooling method.

The white smoke processing apparatus includes a blowing device 55, a heat exchanger 51 and a second flue 53 installed above the heat exchanger 51. The exhaust gas discharged from the first flue 41 is supplied to the second flue 53.

Hereinafter, the process of eliminating the white smoke phenomenon will be described.

The washing water used in the main purification section 1 is in a state where the temperature is raised. Because it has undergone heat exchange with high temperature exhaust gas. The used rinse water will be stored in the rinse water storage tank and is still at high temperature. The circulating pump (61 or the supply pump) supplies the high-temperature rinse water to the heat exchanger (51) and exchanges heat with the outside air supplied by the blower (55). The cleansing water that has undergone the heat exchange is circulated after the heat exchange and is returned to the main purification unit 1 through the cleansing water supply pipe 57.

The air blowing device 55 supplies external air (which will normally be atmospheric) to the heat exchanger 51 to heat-exchange the hot air with the high-temperature washing water and then heat the second flue 53 of the heat exchanger 51, . On the other hand, the exhaust gas discharged from the first flue 41 of the additional treatment tank is supplied to the second flue 53 of the heat exchanger through the duct 49. Then, the exhaust gas is mixed with the heated outside air and discharged to the atmosphere.

The exhaust gas discharged from the additional processing section 35 is supersaturated. When the crossing point of the absolute humidity and the temperature is mixed with the heated atmosphere supplied from the air blowing device 55 and is within the white smoke generation threshold line, The white pheasant will not be seen. The temperature and pressure at each part of the system are measured by each gauge and used as data for system operation.

The present invention may be interpreted in terms of a method. Hereinafter, this method aspect will be considered.

First, the upper end of the main treatment tank 3 is opened so that the upper portion is opened. At this stage, the year (5, Fig. 1) in the original main treatment tank is removed. This year (5) can be utilized as the first year (41) depending on circumstances.

Then, a cylindrical additional treatment tank 37 having the same diameter is connected to the upper end of the main treatment tank 3. Flanges may be used in this process. The first flue 41 is connected to the upper end of the additional treatment tank 37.

In the interior of the additional treatment tank 37, an oil and odor removing additional filter member 43 for removing oil and odor are provided. The configuration of the additional filter element 43 is as described above.

According to the present invention, the white smoke treatment device 33 is provided beside the main treatment tank 3, and the exhaust gas discharged from the first flue 41 is supplied to the white smoke treatment device 33 to remove white smoke Step < / RTI > The white smoke treatment method of the white smoke treatment apparatus 33 is as described above.

By using the above method, it is possible to obtain the best purification effect that can meet the regulatory conditions while using the existing facilities as much as possible. Thus, it is possible to obtain the effect of environmental improvement without imposing a large burden on the industry.

The configuration shown and described above is merely a preferred embodiment based on the technical idea of the present invention. It will be understood by those skilled in the art that various changes may be made without departing from the scope of the present invention. Each embodiment may be used in any combination, and combinations not described above are also within the scope of the present invention.

1: Main purification unit 2: Exhaust gas supply pipe
3: main processing tank 7: treated water storage tank
9, 11, 13: First, second and third spray devices
15, 17, 19: main filter body 21, 23, 25:
31: drain pipe 33: white smoke processing device
35: additional processing unit 37: additional processing tank
41: first flue 43: additional filter element
45: Nautical water separator 46: Drain pipe
47: differential pressure gauge 51: heat exchanger
53: second year 55: blower
61: circulation pump

Claims (6)

A main treatment tank 3 for removing dust and gas contained in the exhaust gas discharged from an industrial site, the main treatment tank 3 being installed upright so as to treat the exhaust gas supplied from the lower part and to discharge the exhaust gas upward; A process water storage tank 7 installed below the main treatment tank 3; Spraying devices (9, 11, 13) installed at two to three places along the height direction inside the main treatment tank (3) and spraying washing water in a downward direction; A filter body (15, 17) provided between the spray devices (9, 11, 13) and adapted to adsorb dust contained in the exhaust gas; A main purifier (1) including a rinse water supply part for supplying rinse water to the spray devices (9, 11, 13);
The main treatment tank 3 is provided at an upper portion thereof to remove oil and odor contained in the exhaust gas,
An additional treatment tank 37 extending from the upper end of the main treatment tank 3;
An additional filter element 43 for removing oil odors installed in the additional treatment tank 37;
And a first flue (41) installed at an upper end of the additional treatment tank (37)
A differential pressure gauge 47 is further provided in the additional treatment tank 37 so as to generate a signal when the pressure load is exceeded by the additional filter member 43 to inform the user to replace the additional filter member 43 And,
A heat exchanger 51 having a second flue 53 installed at an upper portion thereof to receive the washing water heated by the main purifier 1 and a blower 55 for blowing outside air into the heat exchanger 51, And a duct 49 for supplying the exhaust gas discharged from the first flue 41 of the additional treatment tank 37 to the second flue 53 of the heat exchanger 51, ) Are further connected,
The additional filter element 43 is composed of a two-layer structure in which the lower layer is a glass fiber filter 432 made of a glass fiber material and the upper layer is a carbon filter 431 coated with active carbon ,
The additional filter member 43 is formed by a unit filter 43 'in the form of a rectangular plate in which the glass fiber filter 432 and the carbon filter 431 are laminated,

Quot; shape so that the contact area with the exhaust gas is increased, and the adsorbed oil and moisture can flow down on the inclined surface.
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