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WO2000061266A1 - Procede de recyclage de composes absorbants pour le traitement de gaz d'echappement et procede d'utilisation d'un sous-produit - Google Patents

Procede de recyclage de composes absorbants pour le traitement de gaz d'echappement et procede d'utilisation d'un sous-produit Download PDF

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Publication number
WO2000061266A1
WO2000061266A1 PCT/JP1999/002051 JP9902051W WO0061266A1 WO 2000061266 A1 WO2000061266 A1 WO 2000061266A1 JP 9902051 W JP9902051 W JP 9902051W WO 0061266 A1 WO0061266 A1 WO 0061266A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent
solution
sodium
absorption
gas
Prior art date
Application number
PCT/JP1999/002051
Other languages
English (en)
Japanese (ja)
Inventor
Tatsuhiro Nishimura
Original Assignee
Korea Cottrell Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korea Cottrell Co., Ltd. filed Critical Korea Cottrell Co., Ltd.
Publication of WO2000061266A1 publication Critical patent/WO2000061266A1/fr

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Classifications

    • 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
    • B01D53/14—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 by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Definitions

  • This invention relates to equipment unit in the environmental field, to absorbent C 0 2 such as removal is an issue of prevention of harmful gases and global warming of the desulfurization in the exhaust gas (SO x) denitrification (NO x).
  • SO x exhaust gas
  • NO x denitrification
  • absorbent solution directly heated fraction construed S 0 2 gas is S 0 gas concentration
  • the chemical reaction formulas for sodium sulfate (Na 2 S 0,) and sodium nitrate (Na NO), the compounds that cause the deterioration of the absorbent, are low and the cost of sulfuric acid is relatively high.
  • the absorbent of the present invention As a method for solving the above problems of the conventional absorbent, the absorbent of the present invention
  • Harmful gases SO x (9 0%), NO x (1 5%) CO:., (2 0%) rates were simultaneously removed in the neutralization reaction, the resulting synthetic compounds, absorbent on the outside at all As an absorbent that cannot be discharged and recycled, it is used repeatedly as well as by-products at the same time as it is repeatedly recycled and reused, and does not emit wastewater or industrial waste.
  • the objective is to provide a non-polluting absorbent that does not cause water quality and soil pollution environmental problems, which can reduce the economic cost of the agent to 1Z20 to 1Z40 or less. Disclosure of the invention
  • the absorbent of the present invention is a solution of an ionic crystal compound or salt (NaCl) based on Na (metallic sodium), electrolysis of a solution, NO ?, SO, 2 , OH ⁇ 0 ⁇ and N a, H using ' ⁇ H 2 ⁇ replacement ionization reaction, acids, bases of the hydrogen ions H' and a base, the laws of decomposition of product compounds by chemical reaction and thermal decomposition of the hydroxide ion OH, harmful in the exhaust gas
  • the gas is absorbed into the absorbent by the neutralization reaction, the generated synthetic compound absorbent is regenerated, the by-products are effectively used, and the overall effect of the absorbent reaction is achieved.
  • the absorbent of the present invention is obtained by electrolyzing a compound of an ionic crystal and an inexpensive salt (NaCl) solution in (the first absorbent raw material), and obtained by electrolysis.
  • 2nd absorbent The stock solution of sodium hydroxide solution (NaOH) was adjusted to pH around 13 at the start-up of the initial operation, and used as the absorption solution.
  • Raw material solution for by-product absorption 3 pH adjusted to 13 and replenishment of regenerative circulating absorbent It is an effective use method that fulfills the overall role and effect of using the absorbent for recycling and the use of by-products, etc. by using the absorbent, and a method of using an absorbent that is not used with the conventional absorbent.
  • Toxic gas SO x. N 0 X and C 0 in exhaust gas are removed and neutralized, and the absorbed product, sodium hydrogen sulfite (Na HSO) + sodium hydrogen carbonate ( NaHCO) + sodium nitrate (NaNO) + sodium sulfate (NaSO).
  • the fourth method is characterized in that the fourth absorbent is deposited in the process of circulating water and separated from the absorbing solution.
  • the conventional method of using absorbents is to adjust the PH of the absorbed absorbing solution and then oxidize it with air and then drain or absorb it.
  • sodium sulphite (NaSO) is reused, sodium hydroxide (NaOH) is added to sodium sulphite (Na : SO).
  • the fourth absorbent the synthesized compound precipitated and produced at a temperature of 100 to 200 ° C or lower.
  • SO gas ⁇ byproduct material + C 0 2 gas ⁇ (absorbent material) and sulphite Na Application Benefits um (N a 2 S 0) 4 carbonate Na Application Benefits um (N a, C 0) + sodium nitrate (NaN03) + sodium sulfate (NaS0,), which is decomposed into a synthetic compound, and a base alkaline compound with a pH of around 8.7.
  • the conventional absorbent technology which is characterized in that the absorbent of the component (fifth absorbent) is obtained by thermal decomposition, uses sulfur dioxide (SO) by-products and sodium sulfite (Naz SO,). the performing thermal decomposition when recovering as a reproduced using ffl absorbent, absorbent of the present invention, the purpose of heating decomposition, SO?.
  • SO sulfur dioxide
  • Naz SO sodium sulfite
  • the thermal decomposition was obtained by performing (Fifth absorber) performs electrolytic solution, PH 8. 7 sulphite Na Application Benefits um (N a 2 S 0.) bases alkali component around + carbonate Na Application Benefits
  • the sodium (Na 2 CO) + sodium nitrate (Na NO) + sodium sulfate (Na 2 S 0) absorption solution is replaced by hydroxide OH in the electrolysis. It is characterized in that it can be obtained by electrolysis of an alkaline component raw material that performs a neutralization reaction of about 13.5 on average, and an absorption solution of a strong base alkaline component (sixth absorbent). This technology is not available in the conventional method of using absorbents.
  • the absorbent of the present invention the average of the recycled circulating absorbent, and the neutralization reaction before and after the PHI of 3.5
  • the alkaline component material is adjusted to around pH 3. This is the principle of a recycled circulating absorbent, which allows the economic cost of the use of ffl to reduce the economic cost up to the usage limit of the absorbent to less than 20 to 1/40.
  • This section is divided into the sections 1 and 2, and 2, the electrolyzed (sixth absorbent) is adjusted to pH 13 around the biocirculating absorption solution, and the acid in the flue gas is removed. ?
  • N () X ( ⁇ 5?), C 0, (20%) are removed at the same time, and the absorption is repeated in the absorbing solution at the bubbling it;
  • the pH is adjusted to a value that is not easily affected by C 0 of the conventional absorption method, and the absorbent is used.
  • Sodium carbonate (Na 2 C 0,) in the absorber will be effectively used for the harmful gas absorption effect as the alkaline component of the neutralization reaction.
  • Products 1) (first absorption ⁇ fee) salt (N a C l) products generated solution during electrolysis raw material, chlorine gas (C 1 2), and compound heat the hydrogen gas (H 2), burning hydrogen chloride gas after synthesis of hydrogen (HC 1), by-products, hydrochloric acid, an introduction (secondary absorber) byproduct solution raw material chlorine gas hydroxide Na Application Benefits ⁇ beam solution (C 1 2), and a saturated solution, Salt (NaCl) fE digestion raw material and A technology that does not exist in the conventional method of using absorbents, characterized by the effective use of by-products (industrial chemicals) such as tritium (NaC1O) solutions for industrial recycling. A method for effectively using a by-product of the absorbent of the present invention.
  • By-products 2 Synthetic compound, sodium hydrogen sulfite (NaHS (),) sodium hydrogencarbonate (NaHC0, ) + Sodium nitrate (NaN03)-The precipitate of the synthesized compound of sodium tosulfate (Na, sO,) is thermally decomposed to obtain high-concentration SO, ( The raw material (by-product) is converted to sulfuric acid (H 2 S 0) by-product through a vanadium pentoxide (V 20 ,) catalyst, and the sodium hydroxide (second absorbent) for the initial salt solution electrolysis is converted to sodium hydroxide.
  • FIG. 1 is an explanatory diagram of a preferred absorbent according to the present invention, the use of a recirculating absorbent, and a by-product recovery configuration.
  • the absorbing solution at the start-up of the initial operation is supplied to 9 from 9.
  • 9. (Third absorbent) adjusts the absorbing solution to pH 13 and adjusts the S 0 X, (90%) N 0 X. (15%) CO 2 (20%) rate is gas-liquid contacted and neutralized.Simultaneously removed after the reaction. 3. 1 4. 1 5. 1 6. 1 7. 1 8. 1 9. The loop is regenerated and regenerated, and returns to 9. as the first recycle circulating absorption solution (from 5. to 9.
  • the supplied absorbing solution at the start-up of the initial operation is stopped to supply, and the recirculating absorbent solution is replaced and recycled for recycling.
  • the replaced, first-circulation regenerated absorbent solution is absorbed into SOx, N0X, CO in the flue gas by gas-liquid contact and neutralization reaction in 9.10.
  • 9.Recycled recycled absorbent solution returns to 9.Repeatedly and continuously use recirculated recycling.
  • C 0 2 (absorbent material) is 1 7. to regeneration recycle absorption solution (fifth absorber), as the chemical reaction of thermally decomposing below SL, sulfate Na Application Benefits um, nitrate Na Application Benefits um ⁇ 0 0 ⁇ 200 ° C range It is stable without decomposition by thermal decomposition of Iffl.
  • ⁇ 9. ( ⁇ 7 absorption) is the solution of 18.6 absorption).
  • N 0 X (15%) C (),. (20%) rate can be removed when l'i] pH Return to 9. (Third absorbent) through absorption line.
  • 1 9. (seventh absorbent) is supplied from the absorption solution for the absorption reaction, heat decomposition, and electrolysis.
  • the absorber according to the present invention can be used for environmental air pollution prevention equipment such as a combustion boiler, a steel furnace, a power boiler, a heat treatment furnace, a chemical plant, a ceramic furnace, an incinerator, etc.
  • environmental air pollution prevention equipment such as a combustion boiler, a steel furnace, a power boiler, a heat treatment furnace, a chemical plant, a ceramic furnace, an incinerator, etc.
  • an absorber we will also recycle products for industrial use (ie, Kanegawa Chemical) and use them for industry without destructing nature by air pollution ( ⁇ It is targeted. According to MITI industrial statistics table

Landscapes

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

Abstract

L'invention se rapporte à un procédé consistant à faire précipiter un composé absorbant utilisé pour l'extraction des polluants atmosphériques, un composé absorbant utilisé pour l'extraction de SOX, NOX et CO2 qui sont des gaz nuisibles contenus dans un gaz d'échappement, et un composé synthétique formé par neutralisation d'un gaz nuisible, et à soumettre le précipité obtenu à une décomposition par la chaleur et/ou par électrolyse de manière à régénérer un composé absorbant. Ce procédé permet de réutiliser un composé absorbant recyclé de manière continue, c'est à dire d'utiliser ledit composé absorbant recyclé de manière répétée jusqu'à la limite d'utilisation, et il permet de recycler un sous-produit formé lors de la décomposition par la chaleur et le CO2, qui est une cible de l'action menée pour enrayer le réchauffement de la planète, de manière à obtenir une matière utilisable pour la production d'un sous-produit utile (produits chimiques industriels).
PCT/JP1999/002051 1999-04-12 1999-04-19 Procede de recyclage de composes absorbants pour le traitement de gaz d'echappement et procede d'utilisation d'un sous-produit WO2000061266A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/139014 1999-04-12
JP11139014A JP2000296311A (ja) 1999-04-12 1999-04-12 排ガス中のＳＯｘ，ＮＯｘ，ＣＯ２除去吸収剤と、吸収剤の再生循環（リサイクル）使用及び、排ガス組成との反応生成物による副産物（化学工業薬品）の有効利用法。

Publications (1)

Publication Number Publication Date
WO2000061266A1 true WO2000061266A1 (fr) 2000-10-19

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WO (1) WO2000061266A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7708804B2 (en) * 2007-07-11 2010-05-04 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for the separation of a gaseous mixture
KR101155929B1 (ko) * 2009-12-30 2012-06-20 재단법인 포항산업과학연구원 코크스 오븐 가스 중의 황화수소 제거 흡수액 및 그 제거 방법
CN104043327B (zh) * 2014-06-21 2016-08-24 曹学良 一种船舶尾气电催化处理系统
KR101937423B1 (ko) 2017-12-11 2019-01-11 한국생산기술연구원 가압 순산소 연소기 내의 온도 조절 및 부식 방지가 가능한 가압 순산소 연소 시스템
JP7587912B2 (ja) 2019-01-28 2024-11-21 ロバト， ジョージ リチャドサン， ＣＯ２、ＮＯｘ、ＳＯ２の化学的な分離

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS481593B1 (fr) * 1968-12-18 1973-01-18
JPS4926175A (fr) * 1972-07-06 1974-03-08
JPS50139072A (fr) * 1974-04-26 1975-11-06
JPS58114719A (ja) * 1981-12-28 1983-07-08 Ishikawajima Harima Heavy Ind Co Ltd 排煙脱硫硫黄回収方法
JPH08108042A (ja) * 1994-10-14 1996-04-30 Tatsuyasu Nishimura 排煙の脱硫、脱硫・脱硝、脱硫・脱硝・二酸化炭素除去方法及び装置、並びにこれに用いる触媒、吸収剤

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS481593B1 (fr) * 1968-12-18 1973-01-18
JPS4926175A (fr) * 1972-07-06 1974-03-08
JPS50139072A (fr) * 1974-04-26 1975-11-06
JPS58114719A (ja) * 1981-12-28 1983-07-08 Ishikawajima Harima Heavy Ind Co Ltd 排煙脱硫硫黄回収方法
JPH08108042A (ja) * 1994-10-14 1996-04-30 Tatsuyasu Nishimura 排煙の脱硫、脱硫・脱硝、脱硫・脱硝・二酸化炭素除去方法及び装置、並びにこれに用いる触媒、吸収剤

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