KR101205146B1 - desulphurizing agent made from by-product of lime cacination and manufacturing method - Google Patents

desulphurizing agent made from by-product of lime cacination and manufacturing method Download PDF

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KR101205146B1
KR101205146B1 KR1020100094671A KR20100094671A KR101205146B1 KR 101205146 B1 KR101205146 B1 KR 101205146B1 KR 1020100094671 A KR1020100094671 A KR 1020100094671A KR 20100094671 A KR20100094671 A KR 20100094671A KR 101205146 B1 KR101205146 B1 KR 101205146B1
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lime
calcined
sludge
desulfurization
desulfurization agent
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KR1020100094671A
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Korean (ko)
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KR20120033073A (en
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손석규
이윤모
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현대제철 주식회사
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041Oxides or hydroxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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 by adsorption, e.g. preparative gas chromatography
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30Processes for preparing, regenerating, or reactivating
    • B01J20/3021Milling, crushing or grinding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30Processes for preparing, regenerating, or reactivating
    • B01J20/305Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds

Abstract

본 발명은 석회 소성 부산물을 이용한 탈황제의 제조방법에 관한 것이다.
석회소성 슬러지와 분석회석을 혼합 분쇄하고, 소석회를 혼합한 뒤, 물을 섞어 교반한다.
슬러리 형태의 탈황제가 제조되며, 상기 탈황제를 흡착탑(40) 내부로 상향 분사하여 낙하시 배가스와 접촉하여 탈황반응이 이루어지도록 되어 있다.
상기와 같이 폐기되던 석회소성 부산물을 이용하여 습식 탈황제로 사용할 수 있게 됨으로써 폐기물 배출이 감소되고, 상기 석회소성 부산물을 재사용하기 위해 건식분쇄할 필요가 없게 되므로 에너지 사용량이 절감된다.
The present invention relates to a method for preparing a desulfurization agent using lime calcined by-products.
The calcined sludge and the analyzed lime are mixed and ground, the calcined lime is mixed, and the water is mixed and stirred.
A slurry desulfurization agent is prepared, and the desulfurization agent is sprayed upward into the adsorption tower 40 to be in contact with the exhaust gas during the desulfurization reaction.
By using the waste calcined by-products, which can be used as a wet desulphurizer, waste emissions are reduced, and energy consumption is reduced because dry grinding is not necessary to reuse the calcined by-products.
Figure R1020100094671

Description

석회 소성 부산물을 이용한 탈황제 제조방법{desulphurizing agent made from by-product of lime cacination and manufacturing method}Desulphurizing agent made from by-product of lime cacination and manufacturing method
본 발명은 석회 소성 부산물을 이용한 탈황제 제조하는 방법에 관한 것이다.The present invention relates to a method for preparing a desulfurization agent using lime calcined by-products.
제철공장에서는 제선 및 제강공정에서 사용할 생석회를 얻기 위하여 석회소성공정을 실시한다.The steel mill performs a lime firing process to obtain quicklime for use in steelmaking and steelmaking.
석회소성공정에서는 석회석(탄산칼슘(CaCO3))을 공기가 차단된 상태에서 가열하여 이산화탄소(CO2)를 제거함으로써 생석회(산화칼슘(CaO))를 제조한다.In the calcining process, limestone (calcium carbonate (CaCO 3 )) is heated while the air is blocked to remove carbon dioxide (CO 2 ) to prepare quicklime (calcium oxide (CaO)).
본 발명은 폐기되던 석회 소성 부산물을 재활용할 수 있도록 상기 석회 소성 부산물을 이용한 탈황제를 제조하는 방법을 제공함에 목적이 있다.An object of the present invention is to provide a method for preparing a desulfurization agent using the lime calcined by-products to recycle the lime calcined byproducts.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 석회 소성 분산물을 이용한 탈황제 제조방법은, 석회소성 슬러지와 분석회석을 혼합하는 단계와, 상기 석회소성 슬러지와 분석회석의 혼합물을 분쇄하는 단계와, 상기 분쇄된 혼합물에 소석회를 혼합하는 단계와, 상기 석회소성 슬러지와 분석회석과 소석회의 혼합물에 물을 공급하는 물공급단계 및 상기 석회소성 슬러지와 분석회석과 소석회 및 물을 섞어주는 교반단계를 포함하는 것을 특징으로 한다.Desulfurization agent manufacturing method using a calcined calcined dispersion according to the present invention for achieving the above object, the step of mixing the calcined sludge and analyte, and pulverizing the mixture of the calcined sludge and analyte; Mixing the lime with the pulverized mixture, a water supply step of supplying water to the mixture of the calcined sludge and the analyte and the slaked lime, and a stirring step of mixing the calcined sludge with the analyte and the lime and the water. Characterized in that.
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또한, 상기 석회소성 슬러지와 분석회석 혼합 단계에서 상기 석회소성 슬러지중량대비 20~30%의 분석회석을 혼합하고, 상기 소석회 혼합 단계에서 상기 석회소성 슬러지 중량 대비 70~120%의 소석회를 혼합하는 것을 특징으로 한다.In addition, in the mixing of the calcined sludge with the analysis lime, 20 to 30% of the analyzed lime is mixed with respect to the weight of the calcined sludge, and the mixing of the calcined sludge with 70 to 120% of the calcined lime compared to the weight of the calcined sludge It features.
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또한, 상기 물공급단계에서 상기 석회소성 슬러지와 분석회석 및 소석회의 혼합물 중량 대비 75~85%의 물을 공급하는 것을 특징으로 한다.In addition, the water supply step is characterized in that for supplying water of 75 ~ 85% of the weight of the mixture of the calcined sludge and the analysis lime and slaked lime.
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이상 설명한 바와 같은 본 발명에 따르면,According to the present invention as described above,
석회 소성 공정에서 발생하는 부산물인 석회소성 슬러지와 분석회석 및 소석회를 이용하여 슬러리 형태의 습식 탈황제를 제조할 수 있게 된다.Slurry type wet desulphurizer can be prepared by using calcined sludge, analyte and analyte and slaked lime which are by-products of the lime calcining process.
또한, 상기 슬러리 형태의 습식 탈황제를 사용하여 흡수탑 내부에서 배가스와 접촉시킴으로써 배가스로부터 황성분을 제거할 수 있다.In addition, the sulfur component may be removed from the exhaust gas by contacting the exhaust gas in the absorption tower using the slurry type wet desulfurization agent.
상기와 같이 폐기처리되던 석회소성 슬러지를 재활용할 수 있게 되므로 석회 대체제로 활용하기 위해 건조분쇄할 필요가 없게 되며, 이에 에너지 소비가 절감되고, 폐기물 배출이 감소되는 효과가 있다.Since it is possible to recycle the waste calcined sludge as described above, there is no need to dry pulverize to use as a lime substitute, thereby reducing energy consumption and reducing waste emissions.
도 1은 본 발명에 따른 탈황제를 제조하기 위한 장치와, 그 탈황제를 사용하는 배가스 탈황장치의 개략 구성도,
도 2는 본 발명에 따른 탈황제 제조방법을 나타낸 블럭도,
도 3은 본 발명에 따른 배가스 탈황방법을 나타낸 블럭도이다.
1 is a schematic configuration diagram of an apparatus for producing a desulfurization agent and a flue gas desulfurization apparatus using the desulfurization agent according to the present invention;
2 is a block diagram showing a method for producing a desulfurizing agent according to the present invention;
3 is a block diagram showing a flue gas desulfurization method according to the present invention.
이하, 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
표 1은 본 발명에 따른 탈황제의 조성비와 입도 및 비표면적을 나타낸 것이다.Table 1 shows the composition ratio, particle size and specific surface area of the desulfurization agent according to the present invention.

항목

Item

CaO

CaO

SiO2

SiO 2

Al2O3

Al 2 O 3

FeO

FeO

입도

Granularity

비표면적

Specific surface area

함량(건중량)

Content (dry weight)

58~65%

58-65%

1~3%

1-3%

1~2%

1 ~ 2%

1~2%

1 ~ 2%
0.15㎜
이하
75% 이상
0.15 mm
Below
More than 75%
0.075㎜
이하
40% 이상
0.075 mm
Below
More than 40%
10~20
m2/g
10-20
m 2 / g
상기 표 1에서 알 수 있듯이, 본 발명에 따른 탈황제는, 건중량비로 CaO(산화칼슘) 58~65%, SiO2 (이산화규소) 1~3%, Al2O3 (알루미나) 1~2%, FeO (산화철) 1~2%를 포함하고, 나머지는 물과 불순물로 이루어진다.As can be seen in Table 1, the desulfurization agent according to the present invention, CaO (calcium oxide) 58 ~ 65%, SiO 2 (silicon dioxide) 1 ~ 3%, Al 2 O 3 (alumina) 1 ~ 2% by dry weight ratio , FeO (iron oxide) contains 1 ~ 2%, the rest consists of water and impurities.
상기 불순물은 C(탄소)와 MgO(산화마그네슘) 등으로 이루어진다.The impurity consists of C (carbon), MgO (magnesium oxide) and the like.
여기서, 상기 CaO가 58% 보다 적으면 탈황 효율이 과도히 저하되고, 상기 65% 보다 많으면 탈황 효율은 소폭 증가되나 함량 증가에 비해 탈황 효율의 증가율이 미미하여 효율적이지 않다.If the CaO is less than 58%, the desulfurization efficiency is excessively lowered. If the CaO is more than 65%, the desulfurization efficiency is slightly increased, but the increase in desulfurization efficiency is insignificant compared to the increase in content.
또한, 상기 SiO2 , Al2O3 , FeO 의 경우에도, 1% 보다 적으면 함량이 과도하게 낮아 탈황 효과가 없고, 2%(SiO2 의 경우 3%) 보다 많으면 탈황 작용의 주요 성분인 Ca화합물의 함량이 상대적으로 감소함과 더불어 탈황제의 밀도가 증가하여 중량이 증가하므로 이후 설명할 탈황방법에서 상방으로 분사되었을때 과도히 빠른 속도로 낙하함으로써 배가스와의 접촉시간 및 접촉빈도가 감소하여 탈황 효율이 감소되는 원인이 되므로 바람직하지 않다.In addition, in the case of SiO 2 , Al 2 O 3 , FeO, if the content is less than 1% is excessively low, there is no desulfurization effect, if more than 2% (3% in the case of SiO 2 ) Ca is the main component of the desulfurization action As the content of the compound decreases and the density of the desulfurization agent increases, the weight increases, so that when it is injected upward in the desulfurization method described later, the drop rate is excessively high and the contact time and the frequency of contact with the exhaust gas are reduced. It is not preferable because it causes a decrease in efficiency.
한편, 본 발명에 따른 탈황제는 입도 0.015mm 이하의 입자를 75% 이상 포함한다.On the other hand, the desulfurization agent according to the present invention contains 75% or more of particles having a particle size of 0.015 mm or less.
상기와 같이 작은 입도의 입자가 다량 포함되어 있으므로 탈황제의 비표면적이 증가하여 탈황 효율이 향상된다.Since a large amount of particles having a small particle size is contained as described above, the specific surface area of the desulfurization agent is increased to improve the desulfurization efficiency.
특히, 상기 탈황제는 입도 0.075mm 이하의 입자를 40% 이상 포함한다.In particular, the desulfurization agent contains 40% or more of particles having a particle size of 0.075 mm or less.
상기와 같이 매우 미세한 입자를 40% 이상이나 포함하고 있기 때문에 비표면적 증가에 의한 탈황 효율은 더욱 배가된다.Since it contains 40% or more of very fine particles as described above, the desulfurization efficiency by increasing the specific surface area is further doubled.
반대로 상기 입도보다 커질 경우 탈황제의 비표면적이 감소하여 탈황 효율이 저하되므로 바람직하지 않다.On the contrary, when the particle size is larger than the particle size, the specific surface area of the desulfurization agent decreases, so the desulfurization efficiency is lowered.
또한, 본 발명에 따른 상기 탈황제는 비표면적이 10~20 m2/g 의 범위를 갖는데, 탈황제의 비표면적이 10 m2/g 보다 작을 경우 입도가 증가하여 탈황 효율이 떨어지고, 20 m2/g 보다 클 경우 이론적으로 탈황효율은 증가하나 석회소성 슬러지를주재료로 하는 본 발명에 따른 탈황제는 그 보다 큰 비표면적을 갖도록 제조하는 것이 곤란하다.
In addition, the desulfurization agent according to the present invention has a specific surface area in the range of 10 ~ 20 m 2 / g, when the specific surface area of the desulfurization agent is less than 10 m 2 / g increases the particle size, the desulfurization efficiency is lowered, 20 m 2 / When larger than g, theoretically, the desulfurization efficiency is increased, but it is difficult to prepare the desulfurization agent according to the present invention, which is mainly composed of calcined sludge, to have a larger specific surface area.
이제, 본 발명에 따른 상기 탈황제를 제조하는 탈황제 제조방법에 대해 설명한다.Now, a desulfurization agent production method for producing the desulfurization agent according to the present invention will be described.
도 2에 도시된 바와 같이, 본 발명에 따른 탈황제 제조방법은, 석회소성 슬러지와 분석회석을 혼합하는 단계(S11)와, 상기 석회소성 슬러지와 분석회석의 혼합물을 분쇄하는 단계(S12)와, 상기 분쇄된 혼합물에 소석회를 혼합하는 단계(S13)와, 상기 석회소성 슬러지와 분석회석과 소석회의 혼합물에 물을 공급하는 물공급단계(S14) 및, 상기 석회소성 슬러지와 분석회석과 소석회 및 물을 섞어주는 교반단계(S15)를 포함한다.As shown in Figure 2, the desulfurization agent manufacturing method according to the present invention, the step of mixing the calcined sludge and analyte (S11), the step of grinding the mixture of the calcined sludge and analyte (S12), Mixing the calcined lime with the pulverized mixture (S13), a water supply step of supplying water to the mixture of the calcined sludge and the analyte and the calcined lime (S14), and the calcined sludge with the analyte and the calcined lime and water It includes a stirring step (S15) to mix.
상기 석회소성 슬러지는 소성로내의 통기성을 확보하고 이송시 배관 막힘을 방지하기 위해 석회석(소성공정의 원료)을 미리 세척하여 미분을 제거하는 과정에서 발생하며, 부피를 줄이기 위해 필터프레스를 이용하여 탈수된 형태로 배출된다.The calcined sludge is generated in the process of removing the fine powder by washing the limestone (raw material of the firing process) in advance in order to secure air permeability in the kiln and prevent the blockage of the pipe during transportation, and dehydrated using a filter press to reduce the volume. Emitted in form.
상기 석회소성 슬러지는 성상이 석회석과 거의 동등하므로 석회석 대체제로서 소결공정 및 제강공정에서 재활용할 수 있겠으나, 슬러지 특성상 사용을 위해서는 별도의 건조 및 분쇄 과정을 거쳐야 하므로 비용이 많이 들며, 제강공정 투입시 열손실이 크게 발생하므로 현재 거의 폐기되고 있다.The lime-fired sludge can be recycled in the sintering and steelmaking process as a limestone substitute because the properties are almost the same as that of limestone, but due to the nature of the sludge, it requires a separate drying and grinding process, which is expensive. Due to the large heat loss, it is now almost discarded.
그러나, 본 발명은 상기 석회소성 슬러지를 이용하여 습식 조건에서 사용할 수 있는 탈황제를 제조함으로써 폐기물 활용 측면에서 매우 바람직하다.However, the present invention is very preferable in terms of waste utilization by preparing a desulfurization agent that can be used in wet conditions using the calcined sludge.
한편, 상기 분석회석과 소석회 역시 소성공정의 부산물이다.On the other hand, the analysis lime and slaked lime are also by-products of the firing process.
상기 석회소성 슬러지와 분석회석을 혼합하는 단계(S11)에서는 탈수기(상기 필터프레스)에서 탈수되어 슬러지 케이크(cake) 상태로 배출된 석회소성 슬러지에 석회소성 슬러지와의 중량대비 20~30%의 분석회석을 추가 공급하여 혼합한다.In step (S11) of mixing the calcined sludge and the analysis lime, dehydrated in the dehydrator (the filter press) and 20 to 30% of the weight of the calcined sludge discharged in the form of sludge cake. Add limestone to mix.
상기 탈수기에 서 배출된 석회소성 슬러지는 12~16%의 함수율을 가진다.The calcined sludge discharged from the dehydrator has a water content of 12-16%.
이어, 상기 석회소성 슬러지와 분석회석의 혼합물을 분쇄하는 단계(S12)에서는 상기 석회소성 슬러지와 분석회석의 혼합물을 분쇄기(10; 도 1참조)에 넣고 수분을 공급하면서 습식 분쇄한다.Subsequently, in the step (S12) of crushing the mixture of the calcined sludge and the analyzed lime, the mixture of the calcined sludge and the analyzed lime is put into the grinder 10 (see FIG. 1) and wet-pulverized while supplying moisture.
상기 분쇄기로는 볼밀이 이용될 수 있다.A ball mill may be used as the grinder.
이어, 상기 분쇄된 혼합물에 소석회를 혼합하는 단계(S13)에서는 상기 분쇄된 혼합물을 혼합탱크(30)에 넣고 상기 석회소성 슬러지 중량 대비 70~120%의 소석회를 추가한다.Subsequently, in step S13 of mixing the calcined mixture with the pulverized mixture, the pulverized mixture is added to the mixing tank 30 and 70 to 120% of the calcined lime is added to the calcined sludge.
이어, 상기 석회소성 슬러지와 분석회석과 소석회의 혼합물에 물을 공급하는 물공급단계(S14)에서는 상기 혼합탱크(20)에 담겨진 혼합물의 중량 대비 75~85%의 물을 공급한다.Subsequently, in the water supply step (S14) of supplying water to the mixture of calcined sludge and analysis lime and slaked lime, water of 75 to 85% of the weight of the mixture contained in the mixing tank 20 is supplied.
이어, 상기 석회소성 슬러지와 분석회석과 소석회 및 물을 섞어주는 교반단계(S15)에서는 상기 혼합탱크(20)내에 담겨진 석회소성 슬러지와 분석회석과 소석회 및 물을 교반하여 슬러리 상태로 만든다.Subsequently, in the stirring step (S15) of mixing the calcined sludge with the analyzed lime and the calcined lime and the water, the calcined sludge, the analyzed lime, the calcined lime and the water contained in the mixing tank 20 are stirred to form a slurry.
상기 교반을 위해 상기 혼합탱크(20)에는 교반기(30)가 구비된다.The mixing tank 20 is provided with a stirrer 30 for the stirring.
이상 설명한 바와 같은 제조방법에 의해 수분함량 75~85%인 슬러리 상태의 탈황제가 제조된다.By the production method as described above, a slurry desulfurization agent having a water content of 75 to 85% is produced.
상기 슬러리 상태의 탈황제는 이후 설명하는 배가스 탈황방법에서 별도의 건조과정없이 이용된다.
The slurry desulfurization agent is used in the flue gas desulfurization method described later without a separate drying process.
이제, 본 발명에 따른 배가스 탈황방법을 설명한다.Now, a flue gas desulfurization method according to the present invention will be described.
도 3에 도시된 바와 같이(도 1 동시 참조), 본 발명에 따른 배가스 탈황방법은, As shown in FIG. 3 (see FIG. 1 simultaneously), the exhaust gas desulfurization method according to the present invention,
탈황제 공급단계(S21)와, 배가스 도입단계(S22)와, 탈황반응단계(S23)와, 슬러리 배출단계(S24)를 포함한다.Desulfurizer supply step (S21), exhaust gas introduction step (S22), desulfurization reaction step (S23), and slurry discharge step (S24).
상기 탈황제 공급단계(S21)에서는 상기 혼합탱크(20)에서 교반된 슬러리 상태의 탈황제를 탈황제공급관(50)을 통해 흡수탑(40)에 투입하여 상방으로 분사한다.In the desulfurization agent supplying step (S21), the desulfurization agent in the slurry state stirred in the mixing tank 20 is injected into the absorption tower 40 through the desulfurization agent supply pipe 50 and sprayed upward.
상기 흡수탑(40)의 내벽 상부에는 상기 탈황제공급관(50)에 연결된 다수의 분사노즐(41)이 설치되어 있으며, 상기 분사노즐(41)은 분사공이 상방으로 형성되어 있어서, 상기 슬러리 상태의 탈황제가 펌프(35)에 의해 가압 공급되면 상기 분사노즐(41)의 분사공으로부터 흡수탑(40)의 내부공간으로 상향 분사된다.A plurality of injection nozzles 41 connected to the desulfurization agent supply pipe 50 are installed on the inner wall of the absorption tower 40, and the injection nozzles 41 are formed with injection holes upward, so that the desulfurization agent in the slurry state is provided. When the pressure is supplied by the pump 35 is injected upward from the injection hole of the injection nozzle 41 into the interior space of the absorption tower 40.
분사된 슬러리는 미세한 물방울 내부에 탈황제 입자들이 포함되어 있는 상태로서 분사력에 의해 상승하였다가 자중에 의해 흡수탑(40) 하부로 낙하된다.The injected slurry rises by the spraying force as the desulfurizing agent particles are contained in the fine water droplets and then falls to the lower portion of the absorption tower 40 by its own weight.
한편, 상기 배가스 도입단계(S22)에서는 공장에서 발생된 배가스가 배가스관(53)을 타고 흡수탑(40)의 하부로 도입된다.On the other hand, in the exhaust gas introduction step (S22), the exhaust gas generated in the factory is introduced into the lower portion of the absorption tower 40 by riding the exhaust gas pipe (53).
상기 흡수탑(40) 내부의 배가스관(53) 단부에는 산기관(42)이 연결되어 있어, 배가스는 상기 산기관(42)을 통해 기포 형태로 배출된다. 이를 위해 상기 흡수탑(40)의 하부에는 탈황제 분사를 충분한 시간 동안 선 수행하여 낙하한 탈황제가 상기 산기관(42)을 덮을 정도로 고여 있도록 한다. 상기 산기관(42)은 흡수탑(40)이 바닥에 근접하여 설치된다.An diffuser 42 is connected to an end of the exhaust gas pipe 53 inside the absorption tower 40, and the exhaust gas is discharged in a bubble form through the diffuser 42. To this end, the desulfurization agent is preliminarily applied to the lower portion of the absorption tower 40 for a sufficient time so that the desulfurization agent that falls falls to the cover of the diffuser 42. The diffuser 42 is installed in the absorption tower 40 near the bottom.
상기 산기관(42)에서 배출된 배가스는 흡수탑(40)의 상부로 이동하여 배출되는데, 이 과정에서 낙하하는 탈황제 입자와 접촉하여 탈황 반응에 의해 황 성분이 제거된다.The exhaust gas discharged from the diffuser 42 moves to the upper portion of the absorption tower 40 and is discharged. In this process, the sulfur component is removed by contact with the desulfurizing agent particles falling.
상기 탈황제는 석회성분이 주성분이고, 석회소성 슬러지의 수처리 과정에서 Ca(OH)2(수산화칼슘)이 다량 생성되므로 다음과 같은 반응을 통해 탈황이 이루어지게 된다.Since the desulfurization agent is mainly composed of lime, and a large amount of Ca (OH) 2 (calcium hydroxide) is produced in the water treatment process of the calcined sludge, desulfurization is performed through the following reaction.
Ca(OH)Ca (OH) 2 2 + CO+ CO 2 2 → CaCO→ CaCO 3 3 + H+ H 22 OO
CaCOCaCO 3 3 + 2SO2 + H2O → Ca(HSO+ 2SO2 + H2O → Ca (HSO 33 )) 2 2 + CO+ CO 22
Ca(HSOCa (HSO 33 )2 + O2 + O 2 2 + CaCO+ CaCO 3 3 + 3H+ 3H 22 O → 2[CaSOO → 2 [CaSO 4 ·4 · 2H2H 22 O] + COO] + CO 22
한편, 흡수탑(40) 하부에 집수된 슬러리는 상기 슬러리 배출단계(S24)에서 밸브(45)를 열어 배출관(51)을 통해 흡수탑(40) 외부로 배출한다.On the other hand, the slurry collected in the lower absorption tower 40 is discharged to the outside of the absorption tower 40 through the discharge pipe 51 by opening the valve 45 in the slurry discharge step (S24).
상기와 같이 본 발명에 따르면, 기존에 폐기되던 석회소성 슬러지와 또 다른 소성공정의 부산물인 분석회석과 소석회를 혼합하여 제조된 슬러리 형태의 습식 탈황제를 이용하여 제철공장 및 소각로 등에서 발생하는 배가스의 황성분을 제거할 수 있게 된다.As described above, according to the present invention, sulfur components of flue-gases generated in steel mills and incinerators using slurry type wet desulphurizers prepared by mixing previously disposed lime-fired sludge and analytical lime and slaked lime which are by-products of another firing process. Can be removed.
한편, 본 발명은 상기 슬러리 배출단계(S26) 이후에 슬러지 침전단계(S25)와, 슬러지 탈수단계(S26) 및 탈수슬러지 배출단계(S27)를 더 포함할 수 있다.On the other hand, the present invention may further include a sludge settling step (S25), a sludge dewatering step (S26) and a dewatered sludge discharge step (S27) after the slurry discharge step (S26).
상기 슬러지 침전단계(S25)는 상기 슬러리 배출단계(S26)에서 배출관(51)을 통해 배출되는 슬러리를 침전조(60)로 배출하여 슬러리중에서 고형 성분인 슬러지를 침전조(60)의 하부에 침전시킨다.The sludge precipitation step (S25) discharges the slurry discharged through the discharge pipe 51 in the slurry discharge step (S26) to the precipitation tank 60 to precipitate the sludge as a solid component in the slurry in the precipitation tank (60).
이어, 상기 슬러지 탈수단계(S26)에서는 상기 침전조(60)에 침전된 슬러지를 탈수기(90)에 공급하여 탈수한다.Subsequently, in the sludge dehydration step (S26), the sludge precipitated in the settling tank 60 is supplied to the dehydrator 90 to dehydrate the sludge.
이어, 상기 탈수슬러지 배출단계(S27)에서 탈수된 슬러지를 탈수기(90)로부터 배출한다.Subsequently, the dewatered sludge is discharged from the dehydrator 90 in the dewatered sludge discharge step (S27).
상기 배출된 슬러지는 석고 대체제로서 재활용할 수 있다.The discharged sludge can be recycled as a gypsum substitute.
한편, 본 발명은 상기 슬러지 침전단계(S25) 이후에 상등수 재이용단계(S28)을 수행할 수 있다.On the other hand, the present invention may perform a supernatant reuse step (S28) after the sludge precipitation step (S25).
상기 상등수 이용단계(S28)에서는 상기 침전조(60)에서 슬러지와 분리된 상등수를 용수보충관(52)을 통해 상기 혼합탱크(20)로 재공급하여 상기 혼합탱크(20)에서 교반 전 물공급단계(S14)를 수행할 때 사용할 수 있도록 한다.In the supernatant using step (S28), the supernatant separated from the sludge in the sedimentation tank 60 is supplied back to the mixing tank 20 through a water supplement pipe 52 to supply water before stirring in the mixing tank 20. It can be used when performing (S14).
상기 상등수에는 석회 성분이 녹아 있으므로 탈황제 교반이 보다 원활하고 용이하게 이루어진다.Since the lime component is dissolved in the supernatant, the desulfurization agent is more smoothly and easily made.
10 : 분쇄기 20 : 혼합탱크
30 : 교반기 35 : 펌프
40 : 흡착탑 41 : 분사노즐
42 : 산기관 45 : 밸브
50 : 탈황제공급관 51 : 배출관
52 : 용수보충관 53 : 배가스관
60 : 침전조 70 : 탈수기
10: grinder 20: mixing tank
30: stirrer 35: pump
40: adsorption tower 41: injection nozzle
42: diffuser 45: valve
50: desulfurization supply pipe 51: discharge pipe
52: water supplement pipe 53: exhaust gas pipe
60: sedimentation tank 70: dehydrator

Claims (10)

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  5. 석회소성 슬러지와 분석회석을 혼합하는 단계(S11)와,
    상기 석회소성 슬러지와 분석회석의 혼합물을 분쇄하는 단계(S12)와,
    상기 분쇄된 혼합물에 소석회를 혼합하는 단계(S13)와,
    상기 석회소성 슬러지와 분석회석과 소석회의 혼합물에 물을 공급하는 물공급단계(S14) 및,
    상기 석회소성 슬러지와 분석회석과 소석회 및 물을 섞어주는 교반단계(S15)를 포함하는 석회 소성 부산물을 이용한 탈황제 제조방법.
    Mixing the calcined sludge with analyte (S11),
    Pulverizing the mixture of the calcined sludge and analyte (S12),
    Mixing the lime with the ground mixture (S13);
    Water supply step (S14) for supplying water to the mixture of the calcined sludge and analysis lime and slaked lime,
    Method for producing a desulfurization agent using a calcined calcined by-product comprising the stirring step (S15) of mixing the calcined sludge with analytical lime, slaked lime and water.
  6. 청구항 5에 있어서,
    상기 석회소성 슬러지와 분석회석 혼합 단계(S11)에서 상기 석회소성 슬러지중량대비 20~30%의 분석회석을 혼합하고,
    상기 소석회 혼합 단계(S13)에서 상기 석회소성 슬러지 중량 대비 70~120%의 소석회를 혼합하는 것을 특징으로 하는 석회 소성 부산물을 이용한 탈황제 제조방법.
    The method according to claim 5,
    In the step of mixing calcined sludge and analyte lime (S11), 20 to 30% of analyte lime is mixed with respect to the weight of calcined sludge,
    Method for producing a desulfurization agent using lime calcined by-products, characterized in that the calcined lime mixing step (S13) to mix the calcined lime of 70 to 120% by weight of the calcined sludge.
  7. 청구항 5에 있어서,
    상기 물공급단계(S14)에서 상기 석회소성 슬러지와 분석회석 및 소석회의 혼합물 중량 대비 75~85%의 물을 공급하는 것을 특징으로 하는 석회 소성 부산물을 이용한 탈황제 제조방법.
    The method according to claim 5,
    Method for producing a desulfurization agent using lime calcined by-products, characterized in that for supplying water 75 to 85% of the weight of the mixture of the calcined sludge and the analysis lime and slaked lime in the water supply step (S14).
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KR1020100094671A 2010-09-29 2010-09-29 desulphurizing agent made from by-product of lime cacination and manufacturing method KR101205146B1 (en)

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KR101408024B1 (en) 2012-11-30 2014-06-18 한국기계연구원 Gas Dehydration Apparatus using Micro and/or nano Bubble
KR101664273B1 (en) 2015-04-27 2016-10-11 (주)제이엔티아이엔씨 cement mortar compositon and cement mortar comprising the same, method thereof
KR20160127593A (en) 2015-04-27 2016-11-04 (주)제이엔티아이엔씨 eco-friendly snow-removing agent composition and snow-removing agent comprising the same
KR20160134230A (en) 2015-05-15 2016-11-23 (주)제이엔티아이엔씨 manufacturing method of eco-friendly snow-removing agent

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KR101595989B1 (en) * 2014-07-21 2016-02-19 (주)쌍용영월산기 Limestone sludgy supply system for flue gas desulfurization equipment
CN105439417A (en) * 2015-11-18 2016-03-30 陕西科技大学 Red mud sulfur-fixing method
FR3050122B1 (en) * 2016-04-14 2019-11-08 Deltalys NEW PROCESS FOR DEPOLLUTION OR DEODORIZATION OF GAS

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KR100360084B1 (en) 1995-12-28 2003-01-24 주식회사 포스코 Wet desulfurization method using dolomite sludge
KR100720764B1 (en) 2006-07-21 2007-05-23 김재근 Manufacturing method for lime fertilizer

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KR100290638B1 (en) 1996-12-09 2001-06-01 이구택 Method for recycling calcium oxide sludge in converter refining process
KR100720764B1 (en) 2006-07-21 2007-05-23 김재근 Manufacturing method for lime fertilizer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101408024B1 (en) 2012-11-30 2014-06-18 한국기계연구원 Gas Dehydration Apparatus using Micro and/or nano Bubble
KR101664273B1 (en) 2015-04-27 2016-10-11 (주)제이엔티아이엔씨 cement mortar compositon and cement mortar comprising the same, method thereof
KR20160127593A (en) 2015-04-27 2016-11-04 (주)제이엔티아이엔씨 eco-friendly snow-removing agent composition and snow-removing agent comprising the same
KR20160134230A (en) 2015-05-15 2016-11-23 (주)제이엔티아이엔씨 manufacturing method of eco-friendly snow-removing agent

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