KR101129853B1 - Apparatus for treating hazardous gas - Google Patents

Abstract

PURPOSE: A harmful gas treatment apparatus is provided to improve the reaction efficiency of a semidrying-type reactor by properly controlling the temperature of harmful gas. CONSTITUTION: A harmful gas treatment apparatus(100) comprises a case(110), a rotary shaft(120), a drive unit(130), multiple supporters(140), and blades(150,151). A gas inlet(111) is formed in one side of the case, and a gas outlet(112) is formed in the other side. The rotary shaft is installed inside the case. The drive unit supplies power to the rotary shaft. The supporters are vertically installed in the rotary shaft. The blades are installed in the supporters and are connected to each other in a wave shape.

Description

Hazardous Gas Treatment System {APPARATUS FOR TREATING HAZARDOUS GAS}

The present invention relates to a noxious gas treatment device, and in particular, to maximize the reactivity of the harmful gases generated during the combustion of wastes, such as pollutants contained in these harmful gases to improve the treatment efficiency It relates to a gas treatment device.

Recently, various industrial wastes and urban wastes are increasing due to continuous industrial development and improvement of living environment. Accordingly, incineration facilities for combustion treatment of wastes are being installed everywhere.

An incineration facility is a facility for incineration of wastes by using high temperature heat, and usually emits harmful gases during combustion of wastes. In this case, the harmful gases include pollutants such as carbon monoxide (CO), sulfur oxides (SOx), nitrogen oxides (NOx), hydrogen chloride (HCl), and dust, which are exposed to the air and exposed to the human body. Inhalation or contact causes various diseases such as dyspnea, skin disease, and even fatality is well known in various media. Recognizing the dangers of these harmful gases, the government strictly restricts the emission of pollutants to the air, and related industries are researching and developing various facilities for removing pollutants in accordance with the government's policy. . Hereinafter, a general type of incinerator currently in operation will be described in detail with reference to the drawings.

1 is a view showing an incineration plant of a general type.

As shown in FIG. 1, most of the incineration facilities 10 currently installed and operated include an incinerator 20, a waste heat boiler 30, a cyclone 40, a semi-dry reactor 50, and a bag filter 60. , Including a blower 70 and the chimney 80, its function and action is as follows.

First, when the waste is input to the incinerator 20 using the crane 90, the waste is transported by the grate while being transported to the lower side, and the harmful gas generated at this time is discharged to the upper portion of the incinerator 20. The harmful gas discharged in this way flows into the waste heat boiler 30 to minimize heat loss. Thereafter, when the harmful gas passes through the waste heat boiler 30, the cyclone 40 is introduced into the semi-dry reactor 50 to be primarily processed. In this case, an injection nozzle 51 is installed at the upper part of the semi-dry reactor 50, and water, caustic soda, liquid lime, powdered lime, and the like are contacted with the harmful gas through the injection nozzle 51. That is, since most harmful gases are acidic, they are neutralized by injecting basic chemicals into contact with the harmful gases. The harmful gas treated as described above is transferred to the bag filter 60 and is treated as secondary. The bag filter 60 is treated with particulate matter such as residual pollutants and other fine dust that has not been treated in the semi-dry reactor 50. In this case, the blower 70 is installed at the rear end of the bag filter 60 to introduce the harmful gas passed through the semi-dry reactor 50 into the bag filter 60. Finally, the secondary purifying gas passing through the bag filter 60 is discharged into the atmosphere through the chimney 80.

The configuration and operation of a general incineration facility has been described with reference to the drawings. However, the incineration facility described above has the following problems.

First, in the semi-dry reactor 50, the actual reaction rate of the noxious gas and the drug is very low, so in order to completely remove the contaminant, there is no need to add an excessive amount of the drug, thereby increasing the maintenance cost according to the purchase of the drug.

In addition, since the amount of chemicals used increases the amount of clinker attached to the inner wall of the semi-dry reactor 50, it must be removed from time to time, and this operation is very cumbersome, and a person enters the semi-dry reactor 50 directly. Since the clinker must be removed, there is also a risk of death.

In addition, in the hazardous gas treatment process using liquid lime, the reaction rate in the semi-dry reactor 50 increases as the temperature is lower, but the above-described configuration reduces the reaction rate because the temperature of the harmful gas is high, thereby reducing the treatment efficiency. In particular, even after passing through the semi-dry reactor 50, the temperature of the noxious gas is about 180 ° C. or more, and thus a high possibility of a fire occurs in the bag filter 60. However, if the temperature of the harmful gas is too low, low temperature corrosion may occur or moisture may condense in the bag filter 60 to block the micropores, thereby preventing the harmful gas from flowing to perform its function. There is this. Therefore, in order to increase the treatment efficiency of the harmful gas, it is necessary to properly control the temperature of the harmful gas flowing into the semi-dry reactor 50, but incineration facilities currently in operation do not have any means for performing this function. There is a problem that the treatment efficiency appears very low in the actual field application.

The present invention has been made to solve the above-mentioned problems, an object of the present invention is to provide a harmful gas treatment device that can improve the treatment efficiency by sufficiently reacting the harmful gas discharged from the incinerator and chemicals into a semi-dry reactor.

In addition, another object of the present invention to provide a harmful gas treatment apparatus that can minimize the amount of clinker attached to the inner wall of the semi-dry reactor.

As a means for solving the above technical problem,

The present invention is a noxious gas treatment apparatus applied to a semi-dry reactor for treating noxious gas generated during combustion of waste, a case in which a gas inlet is formed at one side and a gas outlet is formed at the other side, and inside the case. A rotating shaft installed, a driving means coupled to the rotating shaft to transmit power, a plurality of supports vertically installed on the rotating shaft, and wings respectively installed on the plurality of supports, wherein the wings are adjacent to each other; It provides a harmful gas treatment device, characterized in that the grounding.

In this case, the wings are preferably arranged in a streamlined shape.

In this case, the case is preferably partitioned into two or more spaces in zigzag communication.

In this case, it is preferable that the shape of the said several support stand is plate-shaped.

In this case, the harmful gas treatment device is preferably installed at the front end of the semi-dry reactor.

According to the present invention, by using the wings that are grounded to each other actively reacting harmful gases and chemicals, and transfer them in a zigzag form to ensure a long residence time can maximize the treatment efficiency in a semi-dry reactor.

In addition, as described above, by minimizing the amount of chemicals used in the semi-dry reactor by pretreatment of harmful gases and chemicals, it is possible to suppress the occurrence of clinker, thereby greatly reducing the cost of repair and of course, which may occur when removing the clinker. Safety accidents can also be prevented.

In addition, by appropriately controlling the temperature of the noxious gas by pretreatment of the noxious gas, the reaction efficiency in the semi-dry reactor can be improved, and the occurrence of fire in the bag filter can be prevented.

1 is a view showing an incineration plant of a general type,
2 is a front sectional view of a harmful gas treating apparatus according to a preferred embodiment of the present invention;
3 is a right side cross-sectional view of a harmful gas treating apparatus according to a preferred embodiment of the present invention;
Figure 4 is a front sectional view showing the main part of the harmful gas treatment apparatus according to a preferred embodiment of the present invention,
5 is a perspective view showing a wing coupling structure of the harmful gas treatment apparatus according to an embodiment of the present invention,
6 is a view showing an incineration facility to which a noxious gas treatment device is applied according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

2 is a front sectional view of a noxious gas treatment apparatus according to a preferred embodiment of the present invention, FIG. 3 is a right sectional view of a noxious gas treatment apparatus according to a preferred embodiment of the present invention, and FIG. 5 is a perspective view showing a wing coupling structure of the noxious gas treatment device according to the preferred embodiment of the present invention.

As shown in Figures 2 to 5, the harmful gas treatment apparatus 100 according to a preferred embodiment of the present invention, the case 110, the rotating shaft 120, the drive means 130, the support 140 And wings 150.

First, the case 110 may be fixed on the pedestal 160 for the convenience of installation and transportation as a configuration for installation of the remaining configuration. In this case, the gas inlet 111 is formed in the lower or front of the case 110, the gas outlet 112 is formed in the upper portion so that harmful gas discharged from the incinerator (not shown) flows.

It is preferable that the gas inlet 111 and the gas outlet 112 are formed as far as possible. This is because the longer the distance between the gas inlet 111 and the gas outlet 112 is, the longer the residence time of the noxious gas in the case 110 may increase the reactivity with the drug. Here, the drug may be used to select caustic soda, hydrated lime and the like, and is injected into the case 110 by using a high-pressure nozzle (not shown) installed adjacent to the gas inlet 111.

On the other hand, in the present invention, the shape of the case 110 is not particularly limited, but as described above, in order to actively contact and mix harmful gases and chemicals, an internal empty space should be minimized, so that the rotation radius of the blade 150 is considered. It is preferable that it is configured in a cylindrical shape.

Next, the rotating shaft 120 is installed horizontally in the width direction inside the case 110 in a configuration for the rotation of the blade 150. Specifically, the rotation shaft 120 is installed in such a way that the bearing coupling to the brackets (161, 162) installed on both sides of the upper portion of the pedestal 160 in the state penetrated by the case 110 is made to rotate.

Next, the driving means 130 is coupled to the rotating shaft 120 and the fan shaft 170 or a gear (not shown) in a configuration for rotating by transmitting power to the rotating shaft 120. In the present invention, the driving means 130 may be a motor, the capacity can be appropriately selected according to the required power, of course.

Subsequently, the support 140 is vertically coupled to the rotary shaft 120 in a configuration for installing the wing 150 spaced apart from the rotary shaft 120 by a predetermined interval. In this case, the support 140 is installed a plurality of maintaining a predetermined interval in the horizontal direction in consideration of the width of the wing 150.

In this case, although the support 140 is illustrated as 180 degrees azimuth, that is, installed in a straight shape, but the shape of the support 140 is not limited to this, by adjusting the azimuth angle to 120 degrees, 90 degrees, etc. as necessary It should be understood that it can be implemented in various forms.

On the other hand, the support 140 may also be formed in a rod-like general shape, but is preferably formed in a plate rather than a rod. As such, when the support 140 is formed in a plate shape, the blocking property against the flow of harmful gas and chemicals introduced into the case 110 may be increased, and thus the residence time may be increased. It is more sufficient to maximize the reaction efficiency.

Finally, the support 150 is a configuration for transferring the harmful gas introduced through the gas inlet 111 and the chemical injected by the high pressure nozzle to the gas outlet 112, the support 140 Are installed on each.

In the present invention, there is no gap between the wing 150 and the other wing 151 adjacent to the wing 150. That is, when there is a gap between the wings 150, 151, because the harmful gas and chemicals immediately exits through this space, the mixing cannot be made sufficiently. Therefore, in the present invention, the wings 150 and 151 are grounded to each other, thereby minimizing empty space, thereby inducing active contact between harmful gases and chemicals, thereby improving reaction efficiency.

On the other hand, the shape of the wing 150 is preferably formed in a plate shape for smooth mixing of the harmful gas and chemical particles, the size is advantageous to be as wide as possible to maximize the impact area, but this is the harmful gas treatment device ( May be suitably limited in consideration of the processing capacity of 100).

In addition, the wing 150 is preferably arranged in a streamlined shape. Specifically, when the wings 150 and 151 are connected in a wave form in which the bone and the acid are repeated as a whole, vortices are generated according to the rotation of the wings 150 to more actively mix harmful gases and chemicals. Can be. However, here, for convenience of description, only the structure in which the bone and the mountain are constantly repeated, but the arrangement of the wings 150 in the present invention is not limited thereto, the height of the bone and the mountain is not constant spiral, wave or It should be understood that other irregular shapes may be deformed.

In this case, in order to arrange the wing 150 as described above, the length of the support 140 must be adjusted, and in this case, an empty space is not formed between the wings 150 and 151. It is preferable to ground each other so as not to. For example, as shown in FIG. 5, when the peak height of the wing 150 is greater than the peak height of the adjacent wing 151, the upper edge of the wing 151 is located at the lower edge of the wing 150. When grounded, the path of harmful gases can be minimized to improve reactivity with chemicals.

The basic configuration of the harmful gas treatment device 100 has been described in detail with reference to the accompanying drawings.

On the other hand, the harmful gas treatment apparatus 100 described above can increase the reaction efficiency of the harmful gas and chemicals when installed in multiple stages, it will be described in more detail below.

First, the case 110 may be configured in parallel with two or more stages. That is, when the case 110 is cylindrical, it is formed to be round in a U shape, and in the case of a hexahedron, a partition is installed on one side to form two or more spaces in the case 110. In this case, the plurality of spaces formed in the case 110 is preferably communicated in a zigzag form so that harmful gases and chemicals can stay for a long time. The rotating shafts 120 are installed in the plurality of spaces, respectively, and are connected to each other by the fan belt 180, and the support 140 and the wings 150 are connected to the rotating shaft 120 in the same manner as described above. Is installed.

When configured as described above, the harmful gas introduced through the gas inlet 111 and the chemical injected by the high-pressure nozzle is mixed in accordance with the rotation of the blade 150 and transferred in a zigzag form, accordingly the case The longer the residence time in the (110), the higher the reaction efficiency of the noxious gas and chemicals.

The configuration of the apparatus for treating hazardous gas according to the preferred embodiment of the present invention has been described in detail with reference to the accompanying drawings. Hereinafter, with reference to the drawings will be described in detail the manner in which the present invention in the incineration facility works.

6 is a view showing an incineration facility to which a noxious gas treatment device is applied according to a preferred embodiment of the present invention.

First, as shown in FIG. 6, the harmful gas treatment device 100 may be installed at the front end of the semi-dry reactor 50. That is, the reaction gas in the semi-dry reactor 50 is maximized by sufficiently mixing the noxious gas and the chemical in the pretreatment process by interposing the noxious gas treatment device 100 in front of the semi-dry reactor 50 in which the main treatment is performed. . Hereinafter, the operation of the present invention on the premise of such an installation state. In this case, here, in order to clearly explain the operation of the present invention as a whole, the waste heat boiler 30, the cyclone 40, the bag filter 60, etc. are described as an incineration facility including all, but the present invention is configured as such It does not apply only to incineration plants that include all of them, and that some or all of these configurations may be absent or may be applied to other types of incineration plants as well.

Initially, waste is introduced into the incinerator 20 by a crane 90. Thereafter, the waste is burned while being transported downward by the grate, and harmful gas is generated in the process. The generated noxious gas is discharged through the upper outlet of the incinerator 20, passes through the waste heat boiler 30, and then flows into the noxious gas treatment device 100 by the cyclone 40. In this case, although not clearly shown in the drawings, the respective components are connected to each other by ducts. In the noxious gas treatment device 110, noxious gas is introduced into the case 110 through the gas inlet 111, and at the same time, basic chemicals such as slaked lime are injected from the high pressure nozzle and mixed. Thereafter, as the wing 150 rotates, the pollutants and the chemicals in the noxious gas are reacted more actively and are transferred in a zigzag form along the case 110. In this process, the harmful gas and the drug have a residence time longer due to the blocking function of the supporter 140, the airtightness and mixing function of the wing 150, and the structural functionality of the case 110, as described above. Recovery is increased and mixed to a significant extent. Subsequently, the noxious gas primary treated in the manner described above is discharged through the gas outlet 112 and introduced into the semi-dry reactor 50 for secondary treatment. In the semi-dry reactor 50, since the harmful gas treatment apparatus 110 processes the harmful gas sufficiently mixed with the chemicals, the amount of the chemicals can be minimized, and thus a cost reduction effect can be obtained. The secondary gas thus treated is introduced into the bag filter 60 to remove residual pollutants and dust in a third manner. Finally, the purified gas passing through the bag filter 60 is discharged to the atmosphere through the chimney (80).

In order to prove the effect of the present invention, the inventors of the present invention actually manufactured the hazardous gas treating apparatus 100 and installed it in an incineration facility. As a result, it was possible to remove up to 90% of the harmful gas in the noxious gas treatment device 100, the remaining 5% in the semi-dry reactor 50, 5% in the bag filter 60 is removed residual contamination It was confirmed that almost no material was generated.

Preferred embodiments of the present invention have been described in detail above with reference to the drawings. The description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the scope of the present invention is represented by the following claims rather than the detailed description, and all changes or modifications derived from the meaning, scope, and equivalent concepts of the claims are included in the scope of the present invention. Should be interpreted as

10: incineration facility 20: incinerator
30: waste heat boiler 40: cyclone
50: semi-dry reactor 51: injection nozzle
60: bag filter 70: blower
80: chimney 100: hazardous gas treatment device
110 case 111 gas inlet
112 gas outlet 120 rotating shaft
130: driving means 140: support
150, 151: wing 160: base
161, 162: bracket 170, 180: fan belt

Claims (5)

delete As a noxious gas treatment device (100) applied to a semi-dry reactor (50) for treating noxious gas generated during combustion of waste,
Gas inlet 111 is formed on one side, the gas outlet 112 is formed on the other side, the rotating shaft 120 is installed inside the case 110, and coupled to the rotating shaft 120 Drive means 130 for transmitting power, and a plurality of supports 140 installed vertically on the rotation shaft 120 and wings 150 respectively installed on the plurality of supports 140,
The case 110 has a U-shaped structure, the wing 150 is connected to the adjacent wing 151 and the corner is connected to each other harmful gas treatment device, characterized in that arranged in the form of a wave repeating the mountain and the valley as a whole ( 100). delete delete The method of claim 2,
The noxious gas treatment device (100) is a noxious gas treatment device (100), characterized in that installed in the front end of the semi-dry reactor (50).

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