CN105605599A - Exhaust gas heater with mist and dust removing function - Google Patents

Exhaust gas heater with mist and dust removing function Download PDF

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Publication number
CN105605599A
CN105605599A CN201610111769.XA CN201610111769A CN105605599A CN 105605599 A CN105605599 A CN 105605599A CN 201610111769 A CN201610111769 A CN 201610111769A CN 105605599 A CN105605599 A CN 105605599A
Authority
CN
China
Prior art keywords
heater
heating
flue gas
dedusting function
chimney
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
CN201610111769.XA
Other languages
Chinese (zh)
Inventor
徐党旗
张知翔
刘永强
陆军
薛宁
周飞
邹小刚
李楠
车宏伟
姬海民
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.)
Xian Xire Boiler Environmental Protection Engineering Co Ltd
Original Assignee
Xian Xire Boiler Environmental Protection Engineering 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 Xian Xire Boiler Environmental Protection Engineering Co Ltd filed Critical Xian Xire Boiler Environmental Protection Engineering Co Ltd
Priority to CN201610111769.XA priority Critical patent/CN105605599A/en
Publication of CN105605599A publication Critical patent/CN105605599A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/08Arrangements of devices for treating smoke or fumes of heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00Intercepting solids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/15081Reheating of flue gases

Abstract

The invention discloses an exhaust gas heater with a mist and dust removing function. The exhaust gas heater comprises a desulfurizer, a heater body and a chimney, wherein the heater body comprises a plurality of heating elements, exhaust gas channels are formed between every two adjacent heating elements, an exhaust gas outlet of the desulfurizer is communicated with the chimney through the exhaust gas channels, and the heating elements are of a bent structure. By the adoption of the exhaust gas heater, mist and dust removal and heating can be conducted on exhaust gas.

Description

A kind of flue gas heater with demist dedusting function
Technical field
The invention belongs to flue gas heat exchange and demist dedusting technology field, relate to a kind of with demist dedustingThe flue gas heater of function.
Background technology
At present, China's bulk zone haze weather occurs frequently, and Environmental Protection Situation is very severe. National developmentReforming committee, Environmental Protection Department, National Energy Board combines sending out of issuing and changes the energy and close for [2014] No. 2093In the notice of printing and distributing " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) "Clearly claiming, " eastern region newly-built coal fired power generation unit Air Pollutant Emission concentration reaches substantiallyTo gas turbine group emission limit (under benchmark oxygen content 6% condition, flue dust, sulfur dioxide,Discharged nitrous oxides concentration is not respectively higher than 10,35,50 milligrams/cubic metre), middle part is newBuild unit and approach in principle or reach gas turbine group emission limit, encourage west area new-built unitApproach or reach gas turbine group emission limit ".
National environmental protection portion, National Development and Reform Commission, National Energy Board combine the environment-development issuing" implement in full coal-burning power plant's minimum discharge and reducing energy consumption work side about printing and distributing [2015] No. 164Case " notice clearly claim: to the year two thousand twenty, all fire coal electricity that possess transformation condition in the whole nationFactory strive realizing minimum discharge (under benchmark oxygen content 6% condition, flue dust, sulfur dioxide, nitrogenEmissions of oxides concentration is not respectively higher than 10,35,50 milligrams/cubic metre), eastern region transformationTask is advanced to 2017 and totally completes, and middle part strives substantially completing in 2018, western partArea all completes at the year two thousand twenty.
The general air leak rate of air curtain that has 1% left and right of swinging GGH, the sulfur dioxide of former fume side can bleedClean fume side, makes unit cannot meet the discharge standard of 35 milligrams/cubic metre, therefore ultralowUnder the background of discharge, the dismounting of GGH becomes inevitable. Remove after GGH, chimney receives that desulfurizing tower goes outThe serious corrosion of mouthful saturated wet flue gas threatens, chimney breast emit white cigarette and chimney rain phenomenon following.At present the most frequently used solution, for to install hydrophily formula smoke re-heater additional at chimney entrance, is utilized waterAs heat carrier, the flue gas of heating chimney entrance, the burn into of alleviating chimney emits white cigarette and chimneyRain phenomenon.
In the indices of minimum discharge requires, dust concentration index is more difficult realization, at presentThe technology path adopting has low low temperature electrostatic dedusting+desulfurizing tower to work in coordination with dedusting, if still cannot be up to standard, alsoWet scrubber need be set. The route that employing wet desulphurization is efficiently worked in coordination with dedusting is substantially by allThe accreditation of electricity group, the efficient demister in wet desulphurization only has full import demister to meet at presentPerformance requirement, and full import demister price is up to up to ten million, is the decades of times of domestic demister,Full import demister mostly is plastic products, easily damaged, and along with lengthening and the coal of service timeChangeable, the soot emissions of desulfurizing tower outlet are difficult to guarantee at every moment can meet the demands, and also canTo adopt wet scrubber to guarantee that discharge does not exceed standard, and the price of wet scrubber is also up to thousands ofTen thousand, and long-term operation stability wait checking, therefore solve clean flue gas and soot emissions and reachTarget is in the research and development of flue gas heater and demister at all, but in prior art, do not have can be rightFlue gas carries out the device of dedusting, demist and heating simultaneously.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of with demistThe flue gas heater of dedusting function, this heater can carry out demist, dedusting and heating to flue gas.
For achieving the above object, the flue gas heater bag with demist dedusting function of the present inventionDraw together desulfurizing tower, heater and chimney, heater comprises some heating element heaters, adjacent two heating unitsBetween part, form smoke gas flow circulation passage, the exhanst gas outlet of desulfurizing tower is through smoke gas flow circulation passage and chimney phaseBe communicated with, described heating element heater is warp architecture.
Described heater also comprises hot water inlet header and cooling water outlet header, and each heating element heater isHollow structure, the two ends of heating element heater respectively with entrance and the hot water inlet collection of cooling water outlet headerThe outlet of case is connected.
Also comprise the water rinse-system for rinsing heating element heater surface.
Described heating element heater is prepared from taking titanium alloy or two phase stainless steel as raw material.
Described heating element heater is wavy shaped configuration.
Each heating element heater equidistantly distributes.
The present invention has following beneficial effect:
Flue gas heater with demist dedusting function of the present invention is in the time of work, and flue gas passes throughWhen smoke gas flow circulation passage, by heating element heater, flue gas is heated, simultaneously because described heating is firstPart is warp architecture, has demist dedusting function, when the clean flue gas that contains droplet and dust granules fromWhen desulfurizing tower is out flowed through between adjacent heating element heater afterwards, the droplet in flue gas and dust granules can quiltsThe outer surface of heating element heater traps, and while flue gas can be heated element and heat, thereby reachesThe effect of demist, dedusting and heating, simple in structure, easy to operate, can significantly reduce chimney and go outThe dust emission concentration at mouth place.
Further, utilize water rinse-system to rinse the surface of heating element heater, prevent that secondary from takingBand reduces the resistance of heater simultaneously, improve the exchange capability of heat of heater, reaches energy-saving and emission-reductionObject.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of heater 2 in the present invention;
Fig. 3 is the distribution map of heating element heater 6 in the present invention.
Wherein, 1 for desulfurizing tower, 2 for heater, 3 for water rinse-system, 4 for chimney, 5 isHot water inlet header, 6 is that heating element heater, 7 is that cooling water outlet header, 8 is smoke gas flow circulation passage.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
With reference to figure 1, Fig. 2 and Fig. 3, the flue gas with demist dedusting function of the present inventionDevice comprises desulfurizing tower 1, heater 2 and chimney 4, and heater 2 comprises some heating element heaters 6, phaseBetween adjacent two heating element heaters 6, form smoke gas flow circulation passage 8, the exhanst gas outlet of desulfurizing tower 1 is through cigaretteAir-flow circulation passage 8 is connected with chimney 4, and described heating element heater 6 is warp architecture.
It should be noted that, described heater 2 also comprises hot water inlet header 5 and cooling water outlet collectionCase 7, each heating element heater 6 is hollow structure, and the two ends of heating element heater 6 go out with cold water respectivelyThe mouth entrance of header 7 and the outlet of hot water inlet header 5 are connected. The present invention also comprises for punchingThe water rinse-system 3 of washing heating element heater 6 surfaces, heating element heater 6 is with titanium alloy or two phase stainless steelFor raw material is prepared from, heating element heater 6 is wavy shaped configuration, and each heating element heater 6 equidistantly distributes.
Specific works process of the present invention is:
Former flue gas becomes containing the saturated of micro-dust and droplet and wets from desulfurizing tower 1 after desulphurization reactionFlue gas, containing saturated wet flue gas heated element in smoke gas flow circulation passage 8 of micro-dust and dropletAfter 6 heating, discharged by chimney 4, the flue gas corrosion after heating reduces, and chimney rain and Mao Baiyan are existingResemble and weaken. Hot water in hot water inlet header 5 enters in heating element heater 6, and by the side of heat exchangeFormula heats flue gas, and the cold water forming after heat exchange enters into cooling water outlet header 7; SimultaneouslyBecause heating element heater 6 is warp architecture, there is demist dedusting function, when containing micro-dust and dropletSaturated wet flue gas enter into smoke gas flow circulation passage 8, the dust in flue gas and droplet can be heatedThe surface trapping of element 6, heated element 6 heats again simultaneously, thereby reach demist, dedusting andThe object of heating, the flue gas after demist, dedusting and heating is discharged by chimney 4. Certain when usingAfter time, utilize water rinse-system 3 to rinse the surface of heating element heater 6, prevent that secondary from takingBe with, reduce the resistance of heater 2 simultaneously, improve the exchange capability of heat of heater 2. Described heating is firstThe material of part 6 is titanium alloy or two phase stainless steel, and service life is longer.

Claims (6)

1. with a flue gas heater for demist dedusting function, it is characterized in that, comprise desulfurizing tower(1), heater (2) and chimney (4), heater (2) comprises some heating element heaters (6), phaseBetween adjacent two heating element heaters (6), form smoke gas flow circulation passage (8), the flue gas of desulfurizing tower (1) goes outMouth is connected with chimney (4) through smoke gas flow circulation passage (8), and described heating element heater (6) is bendingStructure.
2. the flue gas heater with demist dedusting function according to claim 1, its featureBe, described heater (2) also comprises hot water inlet header (5) and cooling water outlet header (7),Each heating element heater (6) is hollow structure, the two ends of heating element heater (6) respectively with cooling water outletThe outlet of the entrance of header (7) and hot water inlet header (5) is connected.
3. the flue gas heater with demist dedusting function according to claim 1, its featureBe, also comprise the water rinse-system (3) for rinsing heating element heater (6) surface.
4. the flue gas heater with demist dedusting function according to claim 1, its featureBe, described heating element heater (6) is prepared from taking titanium alloy or two phase stainless steel as raw material.
5. the flue gas heater with demist dedusting function according to claim 1, its featureBe, described heating element heater (6) is wavy shaped configuration.
6. the flue gas heater with demist dedusting function according to claim 1, its featureBe, each heating element heater (6) equidistantly distributes.
CN201610111769.XA 2016-02-29 2016-02-29 Exhaust gas heater with mist and dust removing function Pending CN105605599A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610111769.XA CN105605599A (en) 2016-02-29 2016-02-29 Exhaust gas heater with mist and dust removing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610111769.XA CN105605599A (en) 2016-02-29 2016-02-29 Exhaust gas heater with mist and dust removing function

Publications (1)

Publication Number Publication Date
CN105605599A true CN105605599A (en) 2016-05-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610111769.XA Pending CN105605599A (en) 2016-02-29 2016-02-29 Exhaust gas heater with mist and dust removing function

Country Status (1)

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CN (1) CN105605599A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104928A (en) * 1993-09-28 1995-07-12 巴布考克及威尔考克斯公司 Water/steam-cooled U-beam impact type particle separator
CN100429460C (en) * 2002-11-05 2008-10-29 巴布考克日立株式会社 Exhaust gas treating apparatus
EP2127728A1 (en) * 2006-12-27 2009-12-02 Babcock-Hitachi Kabushiki Kaisha Method and apparatus for treating discharge gas
CN203810434U (en) * 2014-04-22 2014-09-03 西安交通大学 Novel flue gas heater with demisting function
CN104100994A (en) * 2014-07-04 2014-10-15 西安西热锅炉环保工程有限公司 Boiler energy saving and emission reduction system based on flue gas waste heat recovery and reheating technology
CN205447790U (en) * 2016-02-29 2016-08-10 西安西热锅炉环保工程有限公司 Flue gas heater with defogging dust removal function

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104928A (en) * 1993-09-28 1995-07-12 巴布考克及威尔考克斯公司 Water/steam-cooled U-beam impact type particle separator
CN100429460C (en) * 2002-11-05 2008-10-29 巴布考克日立株式会社 Exhaust gas treating apparatus
EP2127728A1 (en) * 2006-12-27 2009-12-02 Babcock-Hitachi Kabushiki Kaisha Method and apparatus for treating discharge gas
CN203810434U (en) * 2014-04-22 2014-09-03 西安交通大学 Novel flue gas heater with demisting function
CN104100994A (en) * 2014-07-04 2014-10-15 西安西热锅炉环保工程有限公司 Boiler energy saving and emission reduction system based on flue gas waste heat recovery and reheating technology
CN205447790U (en) * 2016-02-29 2016-08-10 西安西热锅炉环保工程有限公司 Flue gas heater with defogging dust removal function

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Application publication date: 20160525

RJ01 Rejection of invention patent application after publication