CN102423616A - Flue gas purification device for middle and small coal-fired boiler - Google Patents

Flue gas purification device for middle and small coal-fired boiler Download PDF

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Publication number
CN102423616A
CN102423616A CN2011102527398A CN201110252739A CN102423616A CN 102423616 A CN102423616 A CN 102423616A CN 2011102527398 A CN2011102527398 A CN 2011102527398A CN 201110252739 A CN201110252739 A CN 201110252739A CN 102423616 A CN102423616 A CN 102423616A
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CN
China
Prior art keywords
desulfurization
tower
flue gas
flue
denitrification
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN2011102527398A
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Chinese (zh)
Inventor
杨健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Lunan Desulfurization & Denitration Technology Co Ltd
Original Assignee
Hunan Lunan Desulfurization & Denitration Technology 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.)
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Publication date
Application filed by Hunan Lunan Desulfurization & Denitration Technology Co Ltd filed Critical Hunan Lunan Desulfurization & Denitration Technology Co Ltd
Priority to CN2011102527398A priority Critical patent/CN102423616A/en
Publication of CN102423616A publication Critical patent/CN102423616A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The present invention discloses a flue gas purification device for a middle and small coal-fired boiler. The device comprises a desulfurization and dust removal tower and a desulfurization and denitrification tower. The desulfurization and denitrification tower is positioned behind the desulfurization and dust removal tower. The desulfurization and dust removal tower and the desulfurization and denitrification tower are communicated by a lintel flue to form a desulfurization, dust removal and denitrification integrated device. The desulfurization and denitrification tower comprises an upper oxidation absorption agent spraying apparatus and a lower flue gas outlet flue. The upper oxidation absorption agent spraying apparatus comprises spraying pipes and nozzles installed on the spraying pipes. The nozzle sprays the oxidation absorption agent H2O2 downward to remove sulfides and nitrogen oxides in the flue gas. After passing through the desulfurization and dust removal tower to carry out desulfurization, dust removal and dewatering, the flue gas passes through the lintel flue, and then enters the desulfurization and denitrification tower to further carry out desulfurization and denitrification. The oxidation absorption agent spraying apparatus arranged on the upper part of the desulfurization and denitrification tower can be arranged into the multi-layer apparatus according to the parameters of the flue gas. The purified flue gas is dewatered by a secondary gas-liquid separator, and then discharged from the lower flue gas outlet flue of the desulfurization and denitrification tower. The purified flue gas is discharged to the air by a chimney.

Description

The flue gas purifying equipment that is used for middle and small burn coal boiler
Technical field
The present invention relates to smoke eliminator, be specifically related to a kind of smoke eliminator that is used for middle and small burn coal boiler.
Background technology
Present known desulphurization and dust removal integrated device does not possess the denitration function; Another kind of desulfurization simultaneously, denitration, decarbonization device do not have dedusting function; And Process configuration is too complicated, takes up an area of many, invest greatly, operating cost is high, though this technology is possible in theory; But in engineering practice, do not have application example, nobody dares to use so far.And 500,000 middle and small burn coal boilers of China active service operation as important pollution sources be badly in need of a kind of multiple functional, take up an area of less, reduced investment, environment-friendly products that the smoke comprehensive governance efficiency is high.
Summary of the invention
The present invention is directed to the defective that prior art does not possess the denitration function or do not possess dedusting function, a kind of possess simultaneously desulfurization, dedusting and out of stock integration apparatus are provided.
The present invention includes desulfurization and dedusting tower and desulphurization denitration tower, the desulphurization denitration tower is positioned at the back of desulfurization and dedusting tower, and the lintel flue through the top communicates between the two; The desulphurization denitration tower comprises top oxidation sorbent injection device and bottom exhanst gas outlet flue, and top oxidation sorbent injection device comprises shower and be installed on the nozzle on the shower that nozzle sprays the oxidation absorbent downwards and removes the oxide in the flue gas.
Exhanst gas outlet flue the inside, said bottom is provided with the secondary gas-liquid separation device near the tower body place, is used for further removing the moisture in the flue gas, is beneficial to the emptying of flue gas.
The material of said desulfurization and dedusting tower, desulphurization denitration tower, beam flue and bottom exhanst gas outlet flue all adopts carbon steel liner granite correct grinding flag, and other parts material all adopts stainless steel.
The present invention compares with prior art, has increased the desulphurization denitration tower, is the integration apparatus that the desulfurization and dedusting denitration is carried out synchronously, has remedied prior art desulphurizing and dust-removing integral and the disposable SO that removes in the coal-fired flue-gas conscientiously 2, NO, CO deficiency and defective.Top oxidation sorbent injection device in the desulphurization denitration tower adopts nonpoisonous and tasteless hydrogen peroxide solution to make oxidant, to the SO in the flue gas 2, NO carries out oxidation repeatedly and absorbs its reaction equation: SO 2+ H 2O 2→ H 2SO 4NO+H 2O 2→ HNO 3NO 2+ H 2O 2→ 2HNO 3+ H 2O just can realize the comprehensive purification to harmful smoke.
Description of drawings
Fig. 1 looks cross-sectional schematic for master of the present invention.
Fig. 2 is a schematic top plan view of the present invention.
The specific embodiment
As depicted in figs. 1 and 2, the present invention includes desulfurization and dedusting tower A and desulphurization denitration tower B, desulphurization denitration tower B is positioned at the back of desulfurization and dedusting tower A, and the lintel flue 16 by the top communicates between the two.Desulfurization and dedusting tower A comprises elementary spray equipment 1, inlet flue duct 2, desulfurization feed liquid pipeline 3, desulfurization feed flow arm 4; Center spray equipment 5, pneumatic swirl-flow devices 6, one-level gas-liquid separation device 7, back purge system 8; Flushing pipe 9, blocking solution ring 10, former flue gas get into inlet flue duct 2 promptly by elementary spray equipment 1 spraying cooling dedusting, get in the tower after through pneumatic swirl-flow devices 6; The flue gas rotary rising of being raised speed, the top of pneumatic swirl-flow devices 6 is provided with center spray equipment 5, the absorption liquid that spray equipment 5 ejects from the center, the former flue gas rotary-cut of rising with rotation; Collision atomizes absorption liquid, and the drip gauge area is enlarged over thousands of times, with the SO in the flue gas 2Neutralization reaction takes place, simultaneously with grit capture, coalescence, removal in the flue gas.The top of pneumatic swirl-flow devices 6 is provided with one-level gas-liquid separation device 7, gas-liquid mixed stream by this device dehydration after, the liquid that is attached to the tower wall in the dry section area of desulfurization and dedusting tower A top flows at the bottom of the tower after by 10 interceptions of blocking solution ring.
Flue gas is through after desulfurization and dedusting tower A desulfurization, dedusting and dewatering, and it is out of stock that the lintel flue 16 through the top gets into the further desulfurization of desulphurization denitration tower B.Flue gas gets into desulphurization denitration tower B to begin to move downward, and flue gas at first passes through the top oxidation sorbent injection device 11 of desulphurization denitration tower B, and this device comprises shower 17 and is installed on the nozzle 18 on the shower, the SO in the flue gas at the volley 2, NO, NO 2Oxidant H with nozzle 18 downward ejections 2O 2Oxidation reaction takes place, and chemical equation is following: SO 2+ H 2O 2→ H 2SO 4, NO+H 2O 2→ H 2NO 3, NO 2+ H 2O 2→ 2H 2NO 3+ H 2O.Through behind what oxidation uptake zone, the sulfide in the flue gas, nitrogen oxide all are absorbed removal.Flue gas after being purified is accomplished dehydration after be located at desulphurization denitration tower B flue outlet 19 the insides near the secondary gas-liquid separation device 14 at tower body place, and then through the chimney emptying, the structure of secondary gas-liquid separation device 14 is identical with one-level gas-liquid separation device 7.
Center spray equipment 5 and pneumatic swirl-flow devices 6, oxidizer injection device 11 can be according to the SO in the flue gas 2, NO XContent what and desulfurization, the specific requirement of denitration rate divide multilayer multistage layout.
The present invention need establish corresponding auxiliary equipment; Comprise the required manhole door of maintenance debugging, inspection platform staircase etc.; And carry out anticorrosionly, and the required sewage draining exit of desulfurization and dedusting waste water need be established in the bottom of desulfurization and dedusting tower A, and the required sewage draining exit of denitration waste water need be established in the bottom of desulphurization denitration tower B.The tower body of desulfurization and dedusting tower A and desulphurization denitration tower B is a carbon steel structure, and interior wall liner granite correct grinding flag can be guaranteed the equipment anticorrosive anti-wear, reduces one-time investment and assurance equipment than long service life.

Claims (3)

1. flue gas purifying equipment that is used for middle and small burn coal boiler; It comprises desulfurization and dedusting tower (A); It is characterized in that: also comprise desulphurization denitration tower (B), desulphurization denitration tower (B) is positioned at the back of desulfurization and dedusting tower (A), and the lintel flue (16) through the top communicates between the two; Desulphurization denitration tower (B) comprises top oxidation sorbent injection device (11) and bottom exhanst gas outlet flue (19), and top oxidation sorbent injection device (11) comprises shower (17) and is installed on the nozzle (18) on the shower (17).
2. the flue gas purifying equipment that is used for middle and small burn coal boiler as claimed in claim 1 is characterized in that: said bottom exhanst gas outlet flue (19) the inside is provided with secondary gas-liquid separation device (14) near the tower body place.
3. the flue gas purifying equipment that is used for middle and small burn coal boiler as claimed in claim 1; It is characterized in that: the composition of tower shell material of said desulfurization and dedusting tower (A), desulphurization denitration tower (B), lintel flue (16) and bottom exhanst gas outlet flue (19) all adopts carbon steel liner granite correct grinding flag, and other parts material all adopts stainless steel.
CN2011102527398A 2011-08-30 2011-08-30 Flue gas purification device for middle and small coal-fired boiler Pending CN102423616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102527398A CN102423616A (en) 2011-08-30 2011-08-30 Flue gas purification device for middle and small coal-fired boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102527398A CN102423616A (en) 2011-08-30 2011-08-30 Flue gas purification device for middle and small coal-fired boiler

Publications (1)

Publication Number Publication Date
CN102423616A true CN102423616A (en) 2012-04-25

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CN (1) CN102423616A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103977662A (en) * 2014-05-07 2014-08-13 岳建华 Ultra-clean dedusting system
CN104971607A (en) * 2015-07-01 2015-10-14 汤荣康 Synergy-method U-shaped integrated desulfurization denitration dedusting complete equipment
CN105013312A (en) * 2015-07-27 2015-11-04 航天环境工程有限公司 Desulfurization and denitration integration absorbing device and application
WO2016023423A1 (en) * 2014-08-15 2016-02-18 大丰市佳诣电力燃料有限公司 Integrated tower for dust removal, desulphurization and denitrification and integrated system for dust removal, desulphurization and denitrification
CN112387046A (en) * 2020-02-25 2021-02-23 史超宁 Flue gas denitration device suitable for coal fired power plant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101053747A (en) * 2007-04-30 2007-10-17 武汉凯迪电力环保有限公司 Simultaneously desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof
CN101530731A (en) * 2009-03-13 2009-09-16 李成岳 Integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition
CN201728057U (en) * 2010-06-22 2011-02-02 青岛宏泰翔环保工程有限公司 Novel device for high-efficiency desulfuration and denitration
CN202199262U (en) * 2011-08-30 2012-04-25 湖南麓南脱硫脱硝科技有限公司 Flue gas purification equipment for small and medium sized coal burning boilers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101053747A (en) * 2007-04-30 2007-10-17 武汉凯迪电力环保有限公司 Simultaneously desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof
CN101530731A (en) * 2009-03-13 2009-09-16 李成岳 Integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition
CN201728057U (en) * 2010-06-22 2011-02-02 青岛宏泰翔环保工程有限公司 Novel device for high-efficiency desulfuration and denitration
CN202199262U (en) * 2011-08-30 2012-04-25 湖南麓南脱硫脱硝科技有限公司 Flue gas purification equipment for small and medium sized coal burning boilers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103977662A (en) * 2014-05-07 2014-08-13 岳建华 Ultra-clean dedusting system
WO2016023423A1 (en) * 2014-08-15 2016-02-18 大丰市佳诣电力燃料有限公司 Integrated tower for dust removal, desulphurization and denitrification and integrated system for dust removal, desulphurization and denitrification
CN104971607A (en) * 2015-07-01 2015-10-14 汤荣康 Synergy-method U-shaped integrated desulfurization denitration dedusting complete equipment
CN105013312A (en) * 2015-07-27 2015-11-04 航天环境工程有限公司 Desulfurization and denitration integration absorbing device and application
CN112387046A (en) * 2020-02-25 2021-02-23 史超宁 Flue gas denitration device suitable for coal fired power plant

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Application publication date: 20120425

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