KR101865678B1 - Apparatus for treating combustion gas using dual dry reactor - Google Patents

Apparatus for treating combustion gas using dual dry reactor Download PDF

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Publication number
KR101865678B1
KR101865678B1 KR1020170041581A KR20170041581A KR101865678B1 KR 101865678 B1 KR101865678 B1 KR 101865678B1 KR 1020170041581 A KR1020170041581 A KR 1020170041581A KR 20170041581 A KR20170041581 A KR 20170041581A KR 101865678 B1 KR101865678 B1 KR 101865678B1
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South Korea
Prior art keywords
dry
combustion gas
reactor
absorbent
supplied
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KR1020170041581A
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Korean (ko)
Inventor
김선민
김현덕
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에코매니지먼트코리아홀딩스 주식회사
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Priority to KR1020170041581A priority Critical patent/KR101865678B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention proposes a combustion gas processing apparatus. The apparatus for treating a combustion gas according to an embodiment of the present invention includes a semi-dry type reaction tower for supplying an alkaline liquid absorbent and a powdery absorbent to a combustion gas to remove acid gas from the combustion gas, Type absorber to remove the acid gas from the combustion gas, a combustion gas to which the powdery absorbent is supplied in the first dry-type reactor is supplied, and 2 And a bag filter for filtering the unreacted powdery absorbent supplied from the second dry reactor, wherein an upper part of the first dry reactor and a second dry reactor are connected to each other, The combustion gas vertically rising in the reaction tower is supplied to the second dry reactor and then processed to have a vertically descending flow.

Description

TECHNICAL FIELD [0001] The present invention relates to a combustion gas treating apparatus using a double dry reactor,

The present invention relates to a combustion gas treatment apparatus using a double dry reactor.

The thermal power plant or the waste incineration treatment facility includes facilities for removing the combustion gas of the fossil fuel or the acid gas contained in the combustion gas discharged from the waste incineration process.

For example, an alkaline absorbent is used to remove acidic gases such as sulfuric acid and hydrogen chloride. At this time, a wet removal method, a semi-dry removal method, and a dry removal method are used depending on the state of the absorbent.

In the case of the wet removal method, the absorbent solution is injected to induce the contact with the combustion gas, which results in a problem that the removal efficiency of the acid gas is high but a large amount of wastewater is generated. In the case of the dry removal method, there is a problem in that the alkaline substance is sprayed in the form of powder and does not generate wastewater, but the reaction rate is low and the acid gas removal efficiency is relatively low. In the semi-dry removal method, the wet removal method and the semi-dry removal method are fused together. As a method of spraying the alkaline solution and the powder type slurry together, the acid gas removal efficiency is relatively high, And there is an inconvenience that separate post-processing must be performed to remove it.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems, and it is an object of the present invention to solve the problem that the efficiency of removing acid gas is low.

Korean Patent No. 10-1404801 (entitled " Method for Removing Acidic Gas Using Turbo Reactor)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a combustion gas processing apparatus for removing acid gas from a combustion gas by utilizing a plurality of dry reaction columns connected in series to each other.

It is to be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

As a technical means for accomplishing the above technical object, the apparatus for treating a combustion gas according to an embodiment of the present invention includes a semitransparent reaction tower for supplying an alkaline liquid absorbent and a powdery absorbent to a combustion gas to remove acid gas from the combustion gas, A first dry-type reaction tower for supplying a powdery absorbent to the combustion gas supplied from the semi-dry-type reaction tower to remove the acid gas from the combustion gas, a combustion gas supplied with the powdery absorbent in the first dry- And a bag filter for filtering the unreacted powdery absorbent supplied from the second dry reactor. The second dry reactor includes a second dry reactor for maintaining the reaction between the absorbent and the combustion gas, and a bag filter for filtering the unreacted powdery absorbent supplied from the second dry reactor. At this time, the first dry reactor and the upper part of the second dry reactor are connected, and the combustion gas vertically rising in the first dry reactor is supplied to the second dry reactor and then processed to have a vertically descending flow.

According to the above-mentioned problem solving means of the present invention, since the reaction time of the combustion gas and the powdery absorbent is maximized by connecting a plurality of dry reaction columns in series, the removal efficiency of the acid gas is improved.

1 is a side view of a combustion gas processing apparatus according to an embodiment of the present invention.
2 is a front view of a combustion gas processing apparatus according to an embodiment of the present invention.
3 is a top view of the apparatus for treating a combustion gas according to an embodiment of the present invention.
FIG. 4 is a flowchart showing a method of treating a combustion gas in a combustion gas processing apparatus according to an 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. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is "directly connected" but also includes the case where it is "electrically connected" do.

Throughout this specification, when a member is " on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. The terms "about "," substantially ", etc. used to the extent that they are used throughout the specification are intended to be taken to mean the approximation of the manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) "or" step "used to the extent that it is used throughout the specification does not mean" step for.

The present invention relates to a combustion gas treating apparatus.

FIG. 1 is a side view of a combustion gas processing apparatus according to an embodiment of the present invention. FIG. 2 is a front view of a combustion gas processing apparatus according to an embodiment of the present invention. Is a view showing a top view of a combustion gas processing apparatus according to an embodiment of the present invention.

The illustrated combustion gas processing apparatus 10 includes a semi-dry type reaction tower 100, a first dry type reaction bed 200, a second dry type reaction bed 300, a bag filter 400, and a powdery absorbent supply tower 500 .

The semitransparent reaction column 100 removes the acid gas from the combustion gas according to the semi-dry removal method. That is, the alkaline liquid absorbent and the powdery absorbent are supplied to the combustion gas to remove the acid gas from the combustion gas. The semitransparent reaction column 100 includes a columnar upper reactor 110, a conical lower reactor 120 coupled to the lower portion of the upper reactor 110, An upper portion of the upper reactor 110 is provided with an absorbent supply unit 130 for supplying an alkaline liquid absorbent into the upper reactor 110. The lower reactor 120 is formed in a conical shape so that the acidic gas combined with the absorbent is collected by gravity downward.

Meanwhile, the acid gas may not be completely treated in the semi-dry type reaction tower 100, and the combustion gas containing the acid gas may be removed by passing the acid gas through the first dry type reactor 200 and the second dry type reaction bed 300 Processing is further performed. An inlet 140 connecting the lower reactor 120 of the semi-dry reactor 100 and the lower reactor 220 of the first dry reactor 200 is further disposed, The gas is supplied to the first dry reactor (200) through the inlet (140). The inlet 140 may be formed in a tubular shape connecting the lower reactor 120 of the semi-dry reactor 100 and the lower reactor 220 of the first dry reactor 200, The width of the outlet of the inlet connected to the first dry reactor 200 is wider than the inlet of the inlet 140 connected to the first dry reactor 100 so that the flow rate of the flue gas can be reduced. As the flow rate of the combustion gas is reduced in this manner, the particles having a high specific gravity can be settled downward.

The first dry reactor 200 supplies the powdery absorbent to the combustion gas supplied from the semi-dry reaction tower 100 according to the dry removal method to remove the acid gas from the combustion gas. To this end, the first dry reactor 200 includes a lower reactor 220 through which the combustion gas supplied from the semi-dry reactor 100 flows and discharges the processed materials, and a lower reactor 220 disposed above the lower reactor 220 And a top reactor 210 disposed on top of the venturi section 230. The upper reactor 210 includes a venturi part 230 for supplying a powdery absorbent.

The upper surface of the lower reactor 220 of the first dry reactor 200 is formed in a conical shape and includes an inclined surface extending to a point where it is coupled with the venturi portion 230. The combustion gas is induced to collide with the inclined surface, So that heavy particles are discharged downward. Such an inclined surface is referred to as an inclined surface 240 for accelerating settlement.

The venturi unit 230 connects the lower reactor 220 and the upper reactor 210 to facilitate the mixing of the absorbent and the combustion gas and smooth the supply of the absorbent. The venturi unit 230 increases the instantaneous flow rate of the combustion gas by the venturi effect and promotes the diffusion of the combustion gas in the upper reactor 210 as the flow rate of the combustion gas increases. The venturi portion 230 is installed to prevent dust from adhering to the inside of the venturi portion 230, and the pressure loss can be minimized. In addition, since the venturi portion 230 is installed in the dry reaction tower 200, it is possible to maximize the heat insulating effect and prevent dust from adhering to the wall surface due to moisture generated by condensation. Meanwhile, the powdery absorbent is supplied through the venturi portion 230. For example, an injection nozzle or the like for supplying the powdery absorbent supplied from the powdery absorbent supply tower 500 to be described later to the venturi unit 230 may be combined.

The upper reactor 210 is formed in a cylindrical shape, and the combustion gas and the powdery absorbent react with each other to thereby remove the acid gas. The combustion gas and the powdery absorbent that have passed through the venturi portion 230 can react more actively due to the increase of the flow velocity. A guide vane 250 is connected to the upper part of the upper reactor 210 to connect the first dry reactor 200 and the second dry reactor 300 to each other so that the combustion gas passes through the guide vane 250. The guide vane 250 allows the flow of the combustion gas in the upper part of the first dry reactor 200 to be maintained in the second dry reactor 300, So that the reaction tower 300 has a series structure. Through this structure, the reaction state of the combustion gas and the powdery absorbent can be continuously maintained.

On the other hand, the powdery absorbent supply tower 500 may be disposed adjacent to the first dry reactor 200. Although not shown in FIG. 1, the powdery absorbent supply tower 500 is disposed on the rear surface of the first dry reactor 200. However, as shown in FIG. 3, the rear surface of the first dry reactor 200 Respectively. At this time, the height of the absorbent supply part 510 of the powdery absorbent supply tower 500 is made equal to the height of the venturi part so that energy consumption for supplying the absorbent is minimized.

The second dry reactor 300 is supplied with the combustion gas supplied with the powdery absorbent in the first dry reactor 200, and maintains the reaction between the powdery absorbent and the combustion gas. As described above, the second dry reactor 300 receives the combustion gas from the first dry reactor 200 through the guide vane 250.

At least one venturi-type inlet pipe 310 is disposed on the upper part of the second dry reactor 300 so that the combustion gas supplied to the second dry reactor 300 and the powder- do. In the drawing, three venturi type inflow pipes 310 are disposed at the same interval, which corresponds to one embodiment, and can be changed according to the designer's choice. Thus, sufficient contact time is ensured so that the unburned combustion gas and the powdery absorbent in the primary dry reactor 300 can more closely contact each other.

An air purge device for scattering the powdery absorbent collected in the conical collection duct and collecting the non-reacted powdery absorbent may be disposed in the lower part of the second dry reactor 300 . The powdery absorbent scattered through the air purge device can be filtered after being filtered through the bag filter 400 and then discharged. The powdery absorbent is introduced to be attached to the surface of the bag filter 400 and then discharged to the outside.

FIG. 4 is a flowchart showing a method of treating a combustion gas in a combustion gas processing apparatus according to an embodiment of the present invention.

First, an alkaline liquid absorbent and a powdery absorbent are supplied to the combustion gas supplied to the semi-dry type reaction tower to remove the acid gas (S410).

Next, in the first dry reactor, the powdery absorbent is supplied to the combustion gas supplied from the semi-dry type reactor to remove the acid gas (S420). In this case, the speed of the combustion gas supplied from the semi-automatic reaction tower is reduced to precipitate particles having a specific gravity or the combustion gas and the powdery absorbent are mixed through the venturi unit 230 as described above.

Next, in the second dry reactor, acid gas is removed by maintaining the reaction between the powdery absorbent and the combustion gas (S430). That is, the contact state of the powdery adsorbent supplied from the first dry reactor and the combustion gas is maintained as much as possible to promote the removal of the acid gas.

In the present invention, two dry reaction columns are connected in series, but an apparatus for treating combustion gas by connecting three or more dry reaction columns in series can be constituted.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

10: Flue gas treating device
100: Semi-closed reaction tower
110: Upper reactor 120: Lower reactor
130:
200: Primary Dry Reaction Tower
210: Upper reactor 220: Lower reactor
230: Venturi part 240: Slope for accelerating settling
250: Guide Van
300: Secondary dry reaction tower 310: Venturi type inlet pipe
400: Bag filter
500: Powder type absorbent supply tower

Claims (7)

In the combustion gas processing apparatus,
A semitransparent reaction tower for supplying an alkaline liquid absorbent and a powdery absorbent to the combustion gas to remove the acid gas from the combustion gas,
A primary dry reactor for removing the acid gas from the combustion gas by supplying a powdery absorbent to the combustion gas supplied from the semi-dry reaction tower,
A second dry-type reaction tower which is supplied with the combustion gas supplied with the powdery absorbent in the first dry-type reaction tower and which keeps the reaction between the powdery absorbent and the combustion gas,
And a bag filter for filtering the unreacted powdery absorbent supplied from the second dry reactor,
And an air purging device located at a lower portion of the second dry reaction column for preventing accumulation of powdered absorbent collected in the conical collecting duct and collecting the powdery absorbent not reacted,
Wherein the first dry reactor and the second dry reactor are connected to each other so that the combustion gas vertically rising in the first dry reactor is supplied to the second dry reactor and then is subjected to a vertical descending flow, Gas processing device. The method according to claim 1,
Further comprising an inlet connecting the lower reactor of the semitransparent reaction column and the lower reactor of the first dry reaction column,
Wherein the outlet of the inlet connected to the primary dry reactor is wider than the inlet of the inlet connected to the semitransparent reactor to reduce the flow rate of the combustion gas. The method according to claim 1,
The first dry-type reaction tower
A lower reactor for introducing the combustion gas supplied from the semi-dry reactor and discharging the processed material,
A venturi part disposed on the upper part of the lower reactor and supplying a powdery absorbent;
And an upper reactor disposed on the upper portion of the venturi portion. The method of claim 3,
The upper surface of the lower reactor of the first dry reactor is formed to be inclined to a point where it is coupled with the venturi portion and is arranged to guide the combustion gas to collide with the inclined surface, Device. The method of claim 3,
And a powder type absorbent supply tower disposed adjacent to the first dry type reaction column, wherein the height of the absorbent supply portion of the powdery absorbent supply tower is equal to the height of the venturi portion. The method according to claim 1,
And a guide vane connected to an upper portion of the first dry reactor and the second dry reactor so that the combustion gas passes through the guide vane. The method according to claim 1,
Further comprising at least one venturi-type inlet pipe disposed above the secondary dry reactor.
KR1020170041581A 2017-03-31 2017-03-31 Apparatus for treating combustion gas using dual dry reactor KR101865678B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101426333B1 (en) * 2013-12-03 2014-08-05 한국에너지기술연구원 Spouted bed type reactor for dry flue gas desulfurization and multi- stage desulfurization method using thereof
KR101542845B1 (en) * 2014-08-27 2015-08-07 이보엠텍 주식회사 Bubbling fluidized bed combustor system
KR101710975B1 (en) * 2015-11-20 2017-03-03 주식회사 코레코 Gas distributor of semi-dry reactor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101426333B1 (en) * 2013-12-03 2014-08-05 한국에너지기술연구원 Spouted bed type reactor for dry flue gas desulfurization and multi- stage desulfurization method using thereof
KR101542845B1 (en) * 2014-08-27 2015-08-07 이보엠텍 주식회사 Bubbling fluidized bed combustor system
KR101710975B1 (en) * 2015-11-20 2017-03-03 주식회사 코레코 Gas distributor of semi-dry reactor

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