KR20130033876A - An apparatus for neutralizing acid gas and a method for neutralizing acid gas - Google Patents

An apparatus for neutralizing acid gas and a method for neutralizing acid gas Download PDF

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Publication number
KR20130033876A
KR20130033876A KR1020110097828A KR20110097828A KR20130033876A KR 20130033876 A KR20130033876 A KR 20130033876A KR 1020110097828 A KR1020110097828 A KR 1020110097828A KR 20110097828 A KR20110097828 A KR 20110097828A KR 20130033876 A KR20130033876 A KR 20130033876A
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South Korea
Prior art keywords
acid gas
gas
exhaust gas
exhaust
water
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Application number
KR1020110097828A
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Korean (ko)
Inventor
이종민
이윤모
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현대제철 주식회사
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Priority to KR1020110097828A priority Critical patent/KR20130033876A/en
Publication of KR20130033876A publication Critical patent/KR20130033876A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/14—Packed scrubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

PURPOSE: An apparatus and a method for neutralizing acid gas are provided to remove acid gas from exhaust gas through neutralization using a slag. CONSTITUTION: An apparatus for neutralizing acid gas comprises: a main body(110) with an inner space, an inhalation duct(120), a reaction tank(130) which is connected with the inhalation duct, and a water supply nozzle(140). Exhaust gas contains acid gas and is generated in the main body. The inhalation duct is used for inhaling and transferring the exhaust gas. The reaction tank is filled with slag particles(10) containing calcium oxide. A water supply nozzle supplies water to the reaction tank. The apparatus further comprises: a discharge pipe(150) for discharging the acid gas-removed exhaust gas; and an exhaust gas fan(152) which is coupled at one side of the exhaust pipe.

Description

An apparatus for neutralizing acid gas and a method for neutralizing acid gas}

The present invention relates to an acidic gas neutralizing device and an acidic gas neutralizing method.

Acidic gases are very toxic when introduced into living organisms, and when they are exposed to the atmosphere, they cause acid rain, which causes various environmental problems. Therefore, when acidic gas is generated through chemical reaction, it should be discharged with neutralization and removal of toxicity.

Typically, strong base materials such as sodium hydroxide (NaOH) are used to neutralize acid gases. However, strong base materials such as sodium hydroxide (NaOH) are also very dangerous to organisms and are difficult to handle.

In this regard, there is a technology for solving the problem is published Patent No. 1993-0009655.

Embodiments of the present invention provide an acid gas neutralization apparatus and an acid gas neutralization method for removing acid gas from the exhaust gas containing acid gas through a neutralization reaction.

According to an aspect of the present invention, a space is formed therein, the main body is generated exhaust gas containing acid gas, intake duct for sucking and transporting the exhaust gas from the main body, connected to the intake duct, slag containing calcium oxide An acid gas neutralizing device is provided, comprising a reactor filled with particles and a neutralization reaction with an acid gas, and a water supply nozzle for supplying water to the reactor.

The acid gas neutralizing device may further include an exhaust pipe for exhausting the exhaust gas from which the acid gas has been removed.

The acid gas neutralizing apparatus may include an exhaust fan coupled to one side of the exhaust pipe.

The other side of the exhaust pipe may be coupled to a water removal filter (demister) for removing the water contained in the exhaust gas.

The feed nozzle may be connected to the feed tank and the pump.

The water supplied to the reactor may be neutralized and collected in a water supply tank.

The body may be a fume hood.

In the fume hood body, a door may be formed so that acidic gas is not discharged to the outside.

According to another aspect of the invention, the step of filling the reaction tank with slag containing calcium oxide, the exhaust gas containing acid gas generated in the main body is sucked into the intake duct, supplying water into the reaction tank, acid There is provided an acidic gas neutralization method comprising the step of neutralizing the gas and slag and exhausting the exhaust gas from which the acidic gas has been removed.

The exhausting of the exhaust gas may include exhausting the exhaust gas through the exhaust pipe to which the exhaust fan is coupled and removing moisture included in the exhaust gas.

The water supplied into the reactor is collected in the water supply tank after the neutralization reaction, and may be supplied again into the reactor by the pump.

According to embodiments of the present invention, an acid gas neutralization apparatus and an acid gas neutralization method capable of neutralizing exhaust gas containing acid gas using slag as a by-product of steel may be provided.

1 is a view showing an acidic gas neutralizing device according to an embodiment of the present invention.
Figure 2 is a flow chart showing the acidic gas neutralization method according to another embodiment of the present invention in order.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the acidic gas neutralizing device and the acidic gas neutralizing method according to the present invention will be described in detail with reference to the accompanying drawings. And duplicate description thereof will be omitted.

1 is a view showing an acidic gas neutralizing device according to an embodiment of the present invention.

In accordance with one embodiment of the present invention as shown in Figure 1, there is provided an acidic gas neutralizing device comprising a body 110, an intake duct 120, a reaction vessel 130, a water supply nozzle 140.

The main body 110 has a space formed therein, and exhaust gas containing acidic gas may be generated therein.

Since the living body is harmful when inhaling the acid gas, in the case of a reaction in which the acid gas can be generated, the reaction is inserted into the body 110 in the state of the reactant so that the reaction proceeds inside the body 110.

In this case, according to the present embodiment, the main body 110 may be a fume hood.

The body 110 may be provided with a door 112 to prevent the exhaust gas containing harmful acidic gas to flow to the outside.

The intake duct 120 sucks the exhaust gas generated inside the main body 110 and transfers it to the outside.

Exhaust gas may contain an acid gas harmful to living organisms by a reaction proceeding inside the body 110. If the exhaust gas containing acidic gas is discharged to the outside as it is harmful to living things and the environment, it should be neutralized and discharged.

Therefore, the exhaust gas may be directly connected to the outside to immediately discharge the exhaust gas, but in order to neutralize and discharge the exhaust gas containing the acid gas harmful to living organisms and the environment, the intake duct 120 may react with the reaction tank 130 in which the neutralization reaction is to proceed. ).

The reactor 130 is a place where the neutralization reaction of the acidic gas contained in the exhaust gas occurs.

Inside the reactor 130 is filled with slag particles 10 containing calcium oxide (CaO). The slag particles 10 may be ground to a size suitable for reaction and filling.

According to the present embodiment, the slag particles 10 are pulverized to have a diameter of 5 to 20 mm, to form voids so that the exhaust gas containing the acidic gas and the water supplied into the reaction tank 130 can pass smoothly. Can be.

The water supply nozzle 140 is formed in the reactor 130. The water supply nozzle 140 is for supplying water to the reaction tank 130 and causes a reaction such that calcium oxide (CaO) included in the slag is basic. The water supply nozzle 140 may be a spray nozzle so that water may be evenly distributed.

When calcium oxide (CaO) meets with water, hydroxide ions (OH − ) are generated through the following Schemes 1 and 2, and thus have basicity.

CaO + H 2 O → Ca (OH) 2 (slag elution reaction)

(Formula -2) Ca (OH) 2 → Ca 2+ + 2OH - ( dissociation)

Hydroxide ions generated due to the slag leaching reaction and dissociation (OH -) is the pH of the solution to have a more than 10 made of a strong basic solution.

The intake as duct acid gas sucked through 120 are supplied to the reaction tank 130, dissolved in the water supplied to the reaction bath 130 and generate hydrogen ions (H +), hydrogen ions (H +) generated is The neutralization reaction is completed by reacting with hydroxide ions (OH − ) generated by the slag elution reaction and dissociation reaction.

Since the acidic gas contained in the exhaust gas may be removed by the above-described neutralization reaction, the exhaust gas containing no harmful acidic gas may be discharged, and the effect of recycling slag which is a by-product of steel may be exerted.

In addition, it may be difficult to treat the slag that has a strong base by reacting with water, but the slag also loses basicity and is neutralized through neutralization with acidic gas, so it is effective in slag treatment.

According to this embodiment, the reaction vessel 130 may further include an exhaust pipe 150.

The exhaust pipe 150 is a pipe for discharging the exhaust gas from which the acidic gas has been removed.

An exhaust fan 152 is formed at one side of the exhaust pipe 150 to allow the exhaust gas to be discharged more smoothly.

At this time, the other side of the exhaust pipe 150 may be further coupled to a water removal filter (demister, 154) for removing the water contained in the exhaust gas.

Meanwhile, the water supplied to the reactor 130 using the water supply nozzle 140 reacts with the slag particles 10 and undergoes the remaining water and the neutralization reaction, and the remaining water passes through the pores between the slag particles 10 and the reaction tank 130. It may be collected in the water supply tank 142 disposed below.

Water collected in the water supply tank 142 may be resupplied into the reaction tank 130 by the pump 144 to circulate the reaction tank 130. As a result, it is possible to effectively use the water produced through the saving and neutralization reaction of the water supplied to the reactor 130.

The acid gas neutralizing device according to an embodiment of the present invention has been described above. Hereinafter, an acid gas neutralization method according to another embodiment of the present invention will be described with reference to FIGS. 1 and 2.

2 is a flowchart illustrating an acidic gas neutralization method according to another embodiment of the present invention in order.

As shown in FIG. 2, the step (s110) of filling the slag containing calcium oxide (CaO) into the reaction tank 130 according to another embodiment of the present invention, the exhaust gas containing the acid gas reaction tank 130 There is provided an acidic gas neutralization method comprising the step (s120) of supplying water, the step of supplying water to the reaction tank (s130), the step of neutralizing reaction (s140) and the step of discharging the exhaust gas (s150). .

Filling the slag into the reaction tank 130 (s110), the slag containing calcium oxide (CaO) that reacts with water to form a basic solution is pulverized to a size to form a suitable void to fill the reactor 130 Step.

The slag may be crushed to a size having a diameter of 5 to 20 mm in order to form a suitable void so that the solution containing the exhaust gas and the supplied water can pass smoothly.

Supplying the exhaust gas containing the acidic gas to the reaction tank 130 is performed by the intake duct 120 connecting the body 110 and the reaction tank 130 (s120).

Exhaust gas may contain an acid gas harmful to living organisms by a reaction proceeding inside the body 110. If the exhaust gas containing acidic gas is discharged to the outside as it is harmful to living things and the environment, it should be neutralized and discharged.

Therefore, the intake duct 120 connected to the reaction tank 130 sucks the exhaust gas and supplies the reaction gas to the reaction tank 130 so as to neutralize the reaction.

The step (s130) of supplying water to the reaction tank 130 is a step for allowing the reaction tank 130 to have basicity by reacting calcium oxide (CaO) included in the slag with water. Equation 2

When water is supplied to the reaction tank 130 to have basicity, the exhaust gas containing the acidic gas is supplied to neutralize the reaction (s140). The details are as described above.

After that, the step (s150) of discharging the exhaust gas is performed. The exhaust gas is a stage in which the exhaust gas remaining after the acidic gas is removed by the neutralization reaction is discharged to the outside.

The discharge step may be performed by the exhaust pipe 150 to which the exhaust fan 152 is coupled, and may further include removing moisture contained in the exhaust gas before discharge.

The water supplied to the reaction tank 130 may be collected in the water supply tank 142 as described above, supplied back into the reaction tank 130 by the pump 144, and circulated through the reaction tank 130.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: slag particles
110:
112: door
120: intake duct
130: reactor
140: water supply nozzle
142: water supply tank
144: pump
150: exhaust pipe
152: exhaust fan
154: filter for removing moisture

Claims (11)

A body having a space formed therein and generating exhaust gas containing an acid gas;
An intake duct for sucking and transporting the exhaust gas from the main body;
A reaction tank connected to the intake duct and filled with slag particles containing calcium oxide to cause a neutralization reaction with the acidic gas;
And a water supply nozzle for supplying water to the reactor.
The method of claim 1,
And an exhaust pipe for exhausting the exhaust gas from which the acid gas has been removed.
The method of claim 2,
Acid gas neutralization device, characterized in that it comprises an exhaust fan coupled to one side of the exhaust pipe.
The method of claim 2,
The other side of the exhaust pipe is acidic gas neutralizing device, characterized in that the water removal filter (demister) for removing the water contained in the exhaust gas is coupled.
The method of claim 1,
The water supply nozzle,
Acid gas neutralization device, characterized in that connected to the water supply tank and pump.
The method of claim 5,
The water supplied to the reaction tank is acid gas neutralization device, characterized in that collected through the neutralization reaction to the water supply tank.
The method of claim 1,
The body is an acid gas neutralizing device, characterized in that the fume hood (fume hood).
The method of claim 7, wherein
The fume hood body,
The acid gas neutralizing device, characterized in that the door is formed so that the acid gas is not discharged to the outside.
Filling slag containing calcium oxide into the reactor;
Injecting the exhaust gas containing the acid gas generated inside the main body into the intake duct;
Supplying water into the reactor;
A neutralization reaction occurs with the acid gas and the slag; And
And exhausting the exhaust gas from which the acid gas has been removed.
10. The method of claim 9,
Discharging the exhaust gas,
And exhausting the exhaust gas through an exhaust pipe to which an exhaust fan is coupled, and removing moisture contained in the exhaust gas.
10. The method of claim 9,
The water supplied to the inside of the reactor,
After the neutralization reaction is collected in the water supply tank, the acid gas neutralization method, characterized in that supplied to the inside of the reactor by a pump again.
KR1020110097828A 2011-09-27 2011-09-27 An apparatus for neutralizing acid gas and a method for neutralizing acid gas KR20130033876A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101630296B1 (en) * 2016-03-30 2016-06-14 (주)유나 Acidic gas treatment apparatus
KR101630294B1 (en) 2016-03-30 2016-06-14 (주)유나 Management is easy harmful gas purifying device
KR101636372B1 (en) * 2016-04-04 2016-07-05 (주)유나 The Noxious gas cleaning system
KR101636373B1 (en) * 2016-03-30 2016-07-05 (주)유나 Scrubber for removing acidic gases
KR102044778B1 (en) 2019-02-18 2019-12-02 (주)유나 A fume hood including a neutralizing device and a neutralizing device
TWI708635B (en) * 2018-11-02 2020-11-01 德商達斯環境專家有限責任公司 Apparatus and method for wet cleaning a gas stream

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101630296B1 (en) * 2016-03-30 2016-06-14 (주)유나 Acidic gas treatment apparatus
KR101630294B1 (en) 2016-03-30 2016-06-14 (주)유나 Management is easy harmful gas purifying device
KR101636373B1 (en) * 2016-03-30 2016-07-05 (주)유나 Scrubber for removing acidic gases
KR101636372B1 (en) * 2016-04-04 2016-07-05 (주)유나 The Noxious gas cleaning system
TWI708635B (en) * 2018-11-02 2020-11-01 德商達斯環境專家有限責任公司 Apparatus and method for wet cleaning a gas stream
US11504670B2 (en) 2018-11-02 2022-11-22 Das Environmental Expert Gmbh Apparatus and method for wet cleaning a gas stream
KR102044778B1 (en) 2019-02-18 2019-12-02 (주)유나 A fume hood including a neutralizing device and a neutralizing device

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