CN109186093A - Fire hot-water boiler in a kind of vertical condensation one room - Google Patents
Fire hot-water boiler in a kind of vertical condensation one room Download PDFInfo
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- CN109186093A CN109186093A CN201811184638.XA CN201811184638A CN109186093A CN 109186093 A CN109186093 A CN 109186093A CN 201811184638 A CN201811184638 A CN 201811184638A CN 109186093 A CN109186093 A CN 109186093A
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- boiler
- heating surface
- wall
- coiled pipe
- convection heating
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000009833 condensation Methods 0.000 title claims abstract description 11
- 230000005494 condensation Effects 0.000 title claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 53
- 238000010438 heat treatment Methods 0.000 claims abstract description 52
- 239000003054 catalyst Substances 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 4
- 239000003250 coal slurry Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 241000270295 Serpentes Species 0.000 claims 1
- 238000003466 welding Methods 0.000 description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 29
- 239000003546 flue gas Substances 0.000 description 29
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 16
- 238000000034 method Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 9
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- 238000001816 cooling Methods 0.000 description 6
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- 238000005516 engineering process Methods 0.000 description 4
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
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- 239000000295 fuel oil Substances 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910002554 Fe(NO3)3·9H2O Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
- F28D7/0075—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the same heat exchange medium flowing through sections having different heat exchange capacities or for heating or cooling the same heat exchange medium at different temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
The present invention provides a kind of vertical condensation one rooms to fire hot-water boiler, it include: low NO (1), the symmetrical burner hearth of flame kernel (3), coiled pipe convection heating surface (4), air preheater (5), energy-saving appliance (6), it is discharged header (2), with ontology exhaust pass (7), it is characterised in that the coiled pipe convection heating surface (4) is Flag pattern heat surface structure type, using side wall membrane wall as flagpole.The boiler has the high thermal efficiency.
Description
Technical field
The invention belongs to boiler technology fields, are related to a kind of vertical condensation one room combustion hot-water boiler, more specifically, relating to
And the hot-water boiler of a kind of vertical condensation one room fuel oil, gas, coal dust, water-coal-slurry.
Background technique
Film-type wall boiler fuel oil, combustion gas, fire coal etc. generate high-temperature flue gas by burning and discharge heat, and high-temperature flue gas is advanced
Enter burner hearth, enter back into the waste-heat recovery device of front smoke box, subsequently enter smoke-fire-tube, enters the waste heat recycling in rear smoke box flue afterwards
Device, high-temperature flue gas become low-temperature flue gas and are discharged into atmosphere through chimney.Since boiler greatly increases the heat of fuel combustion release
The utilization rate of amount, so this boiler is very energy saving.
Fin panel casing is the most thorough to the protective effect of furnace wall, therefore furnace wall need to only use thermal insulation material, and does not have to fire proofed wood
Material, greatly reduces furnace wall thickness, weight all, simplifies furnace wall structure, alleviate boiler total weight.Fin panel casing also has
Air-tightness is good, adapts to requirement of the pressure combustion to boiler, is not easy slagging, leak out few, reduction heat loss due to exhaust gas, raising boiler hot
Efficiency.But film-type wall boiler manufacturing process is more complex, the distribution of tube panel thermal stress is more complicated.
CN105588100B discloses a kind of full film type wall fire tube boiler comprising using a furnace of full film type wall structure
Thorax is fixedly connected on a burner of burner hearth one end, using a turning smoke-box of full film type wall structure, a heat exchanger and a vapour
Packet；Wherein, the side of burner hearth is provided with an outlet smokestack, one end connection outlet smokestack for smoke-box of turning, other end connection are changed
Hot device is respectively arranged with annular header in turning smoke-box and the junction for exporting smokestack and heat exchanger；The membrane wall of turning smoke-box
Water cooling tube is connected by the annular header at heat exchanger with the shell of heat exchanger；Drum passes through the annular header at outlet smokestack
It is connected with the membrane wall water cooling tube of turning smoke-box, meanwhile, drum is directly connected and is formed with the membrane wall water cooling tube of burner hearth
Cycle heat exchange channel.
CN107062178A discloses a kind of vertical refuse destruction membrane wall waste heat boiler, and structure is to be hung in bracket
With the membrane wall furnace body into and out of mouth, heat-exchanger rig is equipped in the furnace body.The upside of bracket is equipped with drum steam bubble, and downside is set
There is ash discharging gear.Heat-exchanger rig includes the heat exchanger of the evaporator and downside positioned at upside, and evaporator includes the evaporation of several U-shapeds
Pipe, these evaporation tubes in groups it is opposed together, and along the flow direction arranged for interval of flue gas, the both ends of evaporation tube reach membrane type
The outside of fireplace body；Heat exchanger includes heat exchanger tube, and heat exchanger tube is in curved arrangement；Drum steam bubble passes through inlet pipe and evaporation tube
Input end communicates, and feed liquor header is located in inlet pipe；The outlet end of heat exchanger tube is communicated with drum steam bubble by outlet tube road, out
Liquid header is located at outlet tube road；The outlet end of evaporation tube is communicated with the input end of heat exchanger tube.
CN207262473U discloses a kind of large capacity cornue full film type wall grate firing boiler combined type rear arch, belongs to thermal energy work
Journey applied technical field is related specifically to a kind of back arch structure of large capacity cornue full film type wall grate firing boiler.It include: Boiler Furnace
Row, preceding confession, rear arch, it is characterized in that: the rear arch includes rear arch front, rear arch membrane wall, external membrane wall and insulating layer.
CN106705112A discloses a kind of burner hearth membrane wall of boiler comprising housing is installed on the housing
Inspection door, the housing include shell, pour the first thermal insulation layer on the inside of the shell and pour heat-insulated in described first
First high-temperature-resistant layer of layer inside, the inspection door include the inspection door tube socket for being fixed on the housing opening, are installed on institute
State the inspection door body at inspection door tube socket.
CN100408935C discloses a kind of Composite Uniform Flow Design Method Of Angle Pipe Type Boiler Flag Type Convective Heating Surface, it is adopted
With flag formula convection heating surface bundle diameters at different levels are changed, optimizes heating surface heat transfer temperature and pressure and heat transfer area at different levels, directly reduce end
Grade flag formula restrains the composite design methods such as length and circulation area, realizes that the equal flue gas flow rates of flag formula convection heating surfaces at different levels optimize
Design, makes the average flue gas flow rate of heating surfaces at different levels reach 8m/s or more.
CN201900159U discloses a kind of processing tool of boiler film type wall tube screen for bending rows of products, and the processing tool is by side
Mould, intermediate active mould, movable mold backing plate and link block are constituted, and each side set a side form in intermediate active mould, centre is living
Dynamic model is stacked side by side in half slot by half root tube bending and is installed on link block, and link block is connected with movable mold backing plate, phase
Half root tube bending is also equipped with side by side on side form in half slot with answering.
CN105627279A discloses a kind of biomass fluid bed boiler, including by longitudinal upper drum, lower drum and on
The boiler body that the convection bank that connects between drum and lower drum is constituted, it is characterised in that: the upper drum and lower drum it
Between be also connected with positioned at the prepattern wall at drum both ends and rear membrane wall, positioned at convection bank two sides side membrane wall and be located at
C-shaped membrane wall on the outside of the membrane wall of side；The prepattern wall, rear membrane wall, side membrane wall and C-shaped membrane wall surround to form burning
Room, fluid-bed chamber is arranged in portion in the combustion chamber；The upper drum, lower drum, prepattern wall, rear membrane wall, left membrane wall and the right side
Membrane wall surrounds to form flue.
CN203323102U discloses a kind of coiled pipe membrane wall economizer comprising coiled pipe, support card, side plate,
It is characterized by: the coiled pipe is that seamless steel pipe bends molding, fin is used between two neighbouring pipelines of coiled pipe
Piece is welded to connect to form coiled pipe membrane wall, and coiled pipe membrane wall is respectively arranged on the left side and the right side support card, and coiled pipe
The inlet and outlet of membrane wall upper and lower ends are fixedly connected with support card, and the front and back positioned at the support card of the left and right sides connect respectively
Connect side plate.
CN2404060Y discloses a kind of new film type wall hot pipe boiler, and its underpart is by membrane wall wall, water pipe stove
Row, the upper combustion chamber that membrane wall partition forms and the lower combustion chamber being made of water pipe furnace grate, membrane wall partition wall, casting furnace grate, in
By upper and lower membrane wall partition, the high temperature flue formed with membrane wall partition wall, top is by upper membrane wall partition, low temperature in portion
The centre of partition and upper water layer composition is covered with the low-temperature flue gas channel of gravity assisted heat pipe.
CN106238866B discloses a kind of Ni-based membrane panel welding method, comprising the following steps: by Ni-based pipe and
Ni-based band steel forms tube panel, and an anti-deformation tool is respectively set at tube panel both ends；When welding using specific welding sequence,
Welding manner and weld heat input；The cooling water for having flowing in tube panel always is remained in the welding process.
" boiler diaphragm type wall Panel Bending process modification ", Du Zongwei etc., " scientific and technological visual field ", 21 phases in 2014, by boiler
Force analysis when Superheated Steam Boiler is discussed from manufacturing cost, process-cycle, presentation quality, economic benefit etc.
The design feature and hints on operation of the necessity and corresponding tooling that prevent the exceeded measure of steel pipe ovality are taken when Panel Bending.
" view that Industrial Boiler uses fin panel casing ", Shen Yuan, " Chinese special safety equipment ", 2013 (4): 10-
11, effect and the structural shape of water-cooling wall are described, and in terms of the development history of boiler, drum below for subcritical pressure boiler
The water-cooling wall of boiler is to reduce its temperature to protect furnace wall, improves the operational reliability of boiler, and today has become pot
The main evaporating heating surface of furnace.
" application of the shallow view hot spray-welding in Technique in Boiler Membrane Water Cooled Wall ", Liu Lisheng, " Industrial Boiler ", 2000 (3): 21-
23, the popularization and application with circulating fluidized bed boiler are described, fin panel casing tube panel wear problem becomes increasingly conspicuous, using thermal jet
Welding technology carries out local surfacing nickel-base alloy to membrane panel, the wearability of fin panel casing tube panel can be improved, and specific
Describe the spray welding technology of fin panel casing.
However, in the above prior art, used tradition flag formula pipe is using rear wall membrane wall as flagpole, flag formula pipe
Spacing is limited (generally 80mm-100mm) by membrane wall flagpole structure, and sweep of gases speed is lower, and heating surface utilization rate is low, and
And Flag pattern heat surface is used as heating surface flag using multiple groups single tube parallel, flag formula pipe is single tube, manufactures low efficiency.
Therefore, this field needs the boiler that a kind of heat utilization efficiency is high and manufacture efficiency is high.
Summary of the invention
In order to solve the above-mentioned technical problem, the present inventor is on the basis of previous research, by further furtheing investigate and
It is a large amount of to explore, by co-design, provide following technical scheme.
In one aspect of the invention, a kind of vertical condensation one room combustion hot-water boiler is provided, comprising: low NO,
The symmetrical burner hearth of flame kernel, coiled pipe convection heating surface, air preheater, energy-saving appliance are discharged header and ontology exhaust pass,
It is characterized in that the coiled pipe convection heating surface is Flag pattern heat surface structure type, using side wall membrane wall as flagpole.
Preferably, which is full fin panel casing vertical structure.
Preferably, use side wall membrane wall as flagpole in the coiled pipe convection heating surface, two sides membrane wall is in difference row
It arranges (being staggered).It is highly preferred that flag formula heating surface of tubes (i.e. Flag pattern heat surface) uses single group or two groups of coiled pipe conducts
Heating surface flag.
Tradition flag formula tube spacing in the prior art is limited by membrane wall flagpole structure, generally 80mm-100mm, flue gas
Eroding velocity is lower, and heating surface utilization rate is low.In the present invention, it is preferred to use poor cribbing away from for 50mm, this can be highly effective
Ground increases sweep of gases speed, improves heating surface utilization rate.
Traditional Flag pattern heat surface is used as heating surface flag using multiple groups single tube parallel.In the present invention, flag formula heating surface of tubes is used
Single group or two groups of coiled pipes are as heating surface flag, the row's arrangement of two sides membrane wall difference.Traditional flag formula pipe is single tube, manufactures effect
Rate is low, and improvement structure of the invention uses coiled pipe structure, and manufacturing process all uses flow line production, can be improved life
Produce efficiency.
The material of the coiled pipe is preferably 12Cr1MoV or 12Cr2MoWVTiB.
Preferably, the coiled pipe convection heating surface, which is taken, becomes caliber etc. section design.
In the design of this field conventional boiler structure, temperature can be reduced when flue gas passes through convection heating surface, and volume reduces, cigarette
Gas is more much larger than the flue gas volume by second level convection heating surface by the volume of first order convection heating surface.And tradition
Every grade of convection heating surface of flag formula pipe between use identical caliber and pitch, flue gas circulation area is identical, every grade of sweep of gases by
The speed in hot face is gradually reduced, and the sweep of gases speed of final stage convection heating surface is too low, and heat transfer coefficient is caused to reduce, heating surface benefit
It is low with rate.
In boiler structure of the invention, coiled pipe convection heating surface, which is taken, becomes caliber etc. section design, in convection pass
The two-stage coiled pipe convection heating surface caliber different using identical pitch.That is, first order coiled pipe and second level coiled pipe
Flue gas circulation area is different.It is different with the flue gas circulation area of second level coiled pipe by first order coiled pipe, it can be effectively controlled
The sweep of gases speed of every grade of convection heating surface is identical, improves the sweep of gases speed of final stage convection heating surface, increases heat transfer
The utilization rate of efficiency and heating surface.
Preferably, first order coiled pipe uses the pipe of Φ 38mm diameter, and the second level uses the pipe of Φ 32mm diameter.Experiment hair
Existing, such caliber gradation design can obtain the utilization rate of optimal heat transfer efficiency and heating surface.If the two caliber differs
It is excessive or too small, it is all difficult to obtain the highest thermal efficiency.
This design of the invention is to requirement with higher in implementation process.Since structure and space limit, it is installed
Afterwards welding rejected region is difficult to repair, such as since gap is partially narrow, when welding any road weld bond, other pipes of surrounding
Obstacle can be caused to welding, once being formed stomata and slag inclusion etc., and be difficult to carry out reconditioning, therefore need to guarantee in the fabrication process
Welding quality reaches 100% qualification rate.Therefore, before the mounting, welding quality can be examined with the mode of the water pressure test, welded
Off quality is repaired in a pre-installation, but the water pressure test can not simulate or substitute in full real usage scenario.In order to
Cope with this high welding quality requirement, the welding side that coiled pipe of the invention takes argon tungsten-arc welding and welding electrode arc welding to combine
Formula is made.This welding manner is the particularly effective mode that solves the above problems.
Specifically, the welding manner that argon tungsten-arc welding and welding electrode arc welding combine is as follows: argon tungsten-arc welding bottoming is used,
The weld bond of bottoming qualification carries out capping with welding electrode arc welding (i.e. filling covers).More specifically, the gage of wire of argon tungsten-arc welding
It is the 1/2-1/5 of welding electrode arc welding gage of wire.
The study found that argon tungsten-arc welding has big fusion penetration degree, can solve welding electrode arc welding is not easy the problem of penetrating,
And slag inclusion will not be generated and arc is shunk.When argon tungsten-arc welding use is compared with thin welding wire, backing run control can be made relatively thin
In range, without reconditioning slope slot and it is capable of forming intact connector.After checking that argon tungsten-arc welding bottoming weld bond is qualified
(such as x-ray inspection inspection) carries out capping with welding electrode arc welding, so that it is guaranteed that weld strength.
When taking the Combination Welding mode, the advantages of two kinds of welding manners, can be advantageously combined, Ke Yi great
It is big to improve welding finished product yield.
Preferably, the welding wire of argon tungsten-arc welding are as follows: H10Cr2MnMoWVTiB.And at the same time preferably, welding electrode arc welding
Welding wire are as follows: H10MnSiMoTiA.The present inventor filters out described two welding wires and is used for the Combination Welding by a large amount of screenings,
When using this welding wire, have with coiled pipe (when especially coiled pipe material is 12Cr1MoV or 12Cr2MoWVTiB) material
Optimal compatibility both can ensure that good bottoming performance, and improve yield, and also ensured good weld strength.
It is highly preferred that carrying out heat preservation slow cooling in postwelding to prevent delayed crack after welding.Thermal insulation material can choose silicon
Sour lead glass cotton.
Preferably, which realizes selve support by the frame structure that header is constituted.That is, being not necessarily to other support construction.
This new support construction has the integrated of height, can be with effectively save cost.
Preferably, the energy-saving appliance, air preheater are postposition mode, i.e., the described energy-saving appliance and/or air preheater are set
Set the tract in exhaust pass.
Preferably, the energy-saving appliance is connected to air preheater, can with energy-saving appliance to the air in air preheater into
Row preheating.Certainly, the partial heat being swapped out in energy-saving appliance, can loop back in boiler, improve water inlet/return water of boiler
Temperature.
Preferably, the energy-saving appliance can use water-fire pipe shell structure or fin tube structure.
Preferably, which designs for multiple hearth.It is highly preferred that the boiler is twin furnace or three chamber designs.
It is particularly preferred that when boiler power is 91MW or more, using multiple hearth (twin furnace or three burner hearths) structure, and furnace
Thorax leans on fin panel casing subregion.
Preferably, denitrification apparatus is integrated in the energy-saving appliance.It is highly preferred that being urged in the nitrogen rejection facility filled with denitration
Agent.
Under environmentally friendly implementation dynamics very strict at present, extra high requirement is proposed to the environmental requirement of boiler, very
To the outlet for determining boiler enterprise to a certain extent.Current boiler design has in view of environmental requirement, and novel
Environmental protection technology combine, this is the future developing trend of boiler.
In the existing boiler with denitration function, external flue gas purifying equipment is usually taken.What this mode had
Important drawback is denitration effect difference and capacity usage ratio is low.Because, it is however generally that, denitrating catalyst has certain operating temperature
It is required that and leaving the temperature of the flue gas of energy-saving appliance and/or air preheater is not often the ideal operation temperature for being suitble to catalyst
Degree, it is therefore desirable to reheat, which results in the raising of energy consumption and the raisings of the device is complicated degree.In addition, this mode is integrated
It spends lower, occupies biggish area or volume, do not meet current miniaturization, integrated trend.
For the present invention, by cooperative development, a kind of new high-efficiency denitration catalyst for denitrification apparatus is provided,
The catalyst filled in the denitrification apparatus is particularly preferably the molecular sieve carried catalytic active component FeVO of SSZ-134And CeO2?
The catalyst arrived, can mark and be: FeVO4-CeO2/ SSZ-13.The catalyst of the cooperative development will be carried out separately specially
Benefit application.
The catalyst can be made by method comprising the following steps: (1) with including Fe (NO3)3·9H2O and NH4VO3
Aqueous solution (Fe (NO3)3·9H2The concentration of O is preferably 0.2-0.5M, NH4VO3Concentration be preferably 0.2-0.8M) dipping SSZ-
13 molecular sieves, it is then 1-5 hours dry at 100-120 DEG C, then at temperature lower calcination 1-3 hours of 650-700 DEG C, be made
FeVO4/ SSZ-13 intermediate；(2) then with including Ce (NO3)3Ammonia spirit (Ce (NO3)3Concentration be preferably 0.1-
0.5M, the pH of ammonia spirit are preferably 11-14) the dipping FeVO4/ SSZ-13 intermediate, it is then dry at 100-120 DEG C
1-2 hours, then at temperature lower calcination 1-3 hours of 500-600 DEG C, catalyst Fe VO is made4-CeO2/ SSZ-13。
Preferably, with the total weight of the catalyst, FeVO4Content be 5-10 wt%, CeO2Content be 1-3wt%.
The catalyst can be applied on the hole wall of the honeycomb ceramics of denitrification apparatus by the cladding process of this field routine, or
It is made particles filled in the catalyst bed of denitrification apparatus.
The denitrification apparatus can use the denitrification apparatus design method of this field routine, such as packed bed mode or honeycomb
Body design.
The catalyst, that is, selective catalysis catalyst (SCR catalyst) has high catalytic activity, with NH3Restore NOx
While be able to suppress N2The formation of O mentions high catalytic reduction towards N2Selectivity.The SSZ-13 carrier is conducive to NH3Absorption
In catalyst surface；FeVO4With extra high catalytic activity, catalytic activity is higher than Fe2O3And VOxMixture；CeO2Tool
There are high catalytic activity and selectivity, and is able to suppress FeVO4Resolve into Fe2O3And VOx, improve the thermostabilization of catalyst
Property.
Preferably, in the present invention there is the energy-saving appliance high-temperature flue gas entry and low-temperature flue gas to export.Preferably, described
Heat-dissipating pipe is installed in energy-saving appliance or cooling fin carries out the heat recovery of high-temperature flue gas.
It is particularly preferred that the denitrification apparatus be arranged in energy-saving appliance slave the road that high-temperature flue gas entry to low-temperature flue gas exports
Between 50% before the preceding 30%- of diameter in the position of range.The study found that if denitrification apparatus is arranged excessively forward, it is excessively high
Flue-gas temperature will cause thermal damage to catalyst of the invention, wherein will lead to the sintering of active component, and if position is arranged
It obtains excessively rearward, then flue-gas temperature is difficult to reach the denitration operating temperature of catalyst, to be difficult to carry out catalytic denitration.
In denitrification apparatus work, the NH as reducing agent3It can be added in flue gas in high-temperature flue gas entry.
Since boiler of the invention is equipped with denitrating catalyst, there is especially extensive suitability of fuel.With regard to the present invention
Boiler for, the applicable fuel of the boiler is selected from one of oil, gas, coal dust, water-coal-slurry or a variety of.
Studies have shown that the efficient denitrifying device uses the 0.1-2% that the content of NOx can be made to be reduced to original content.
The content of NOx is the 0.1-2% of the content of NOx in inlet flue gas i.e. in exiting flue gas.Research also found, when use coal dust, water coal
When slurry is as fuel, which also has catalytic degradation effect to the benzene-like compounds in flue gas.
To sum up, in the present invention, using side wall membrane wall as flagpole, (poor cribbing is away from excellent for two sides membrane wall difference row arrangement
It is selected as 50mm), increase sweep of gases speed, improves heating surface utilization rate.Improvement structure of the invention uses coiled pipe structure, raw
It produces manufacturing process and all uses flow line production, improve production efficiency, the two-stage coiled pipe convection heating surface in convection pass
Using the different caliber of identical pitch, coiled pipe is different with the flue gas circulation area of second level coiled pipe, every to control with this
The sweep of gases speed of grade convection heating surface is identical, improves the sweep of gases speed of final stage convection heating surface, increases heat transfer effect
The utilization rate of rate and heating surface.
Additionally or optionally, when using denitrification apparatus of the invention, the discharge amount of NOx can be effectively reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of vertical condensation one according to the present invention room combustion hot-water boiler.
Fig. 2 is the vertical profile for showing the coiled pipe convection heating surface of vertical condensation one according to the present invention room combustion hot-water boiler
View.
In the figure, the coiled pipe convection heating surface is Flag pattern heat surface structure type, using side wall membrane wall conduct
Flagpole, two sides membrane wall is in difference row's arrangement, wherein right side membrane wall is shown in light grey dotted portion.
Fig. 3 is to show that the cross-sectional of the coiled pipe convection heating surface of hot-water boiler is fired in vertical condensation one according to the present invention room
View.
Fig. 4 is the longitudinal section view for showing hot-water boiler coiled pipe convection heating surface according to prior art.
In above-mentioned figure, appended drawing reference is as follows: 1 is low NO, and 2 be water outlet header, and 3 be the symmetrical furnace of flame kernel
Thorax, 4 be coiled pipe convection heating surface, and 5 be air preheater, and 6 be energy-saving appliance, and 7 be ontology exhaust pass, and 8,9 be side wall membrane type
Wall flagpole, 10 be coiled pipe, and 11 be rear wall membrane wall flagpole, and 12 be flag formula furnace.
Specific embodiment
It is to illustrate specific embodiments of the present invention, but the present invention is not limited thereto below.
Embodiment 1
With reference to Fig. 1-3, it is shown that fire hot-water boiler in vertical condensation one room, comprising: low NO (1), flame kernel is symmetrical
Burner hearth (3), coiled pipe convection heating surface (4), air preheater (5), energy-saving appliance (6), is discharged header (2) and ontology exports cigarette
Road (7), the coiled pipe convection heating surface (4) is Flag pattern heat surface structure type, using side wall membrane wall as flagpole, the pot
Furnace is full fin panel casing vertical structure, uses side wall membrane wall as flagpole, two sides in the coiled pipe convection heating surface (4)
Membrane wall uses natural gas as fuel in difference row's arrangement, poor cribbing away from for 50mm.
Comparative example 1
The boiler of the comparative example and the difference of embodiment 1 are only that using traditional film type wall shown in Fig. 4, wherein using flag formula pipe
And flag formula pipe is using rear wall membrane wall as flagpole.
After tested, the boiler of embodiment 1 is compared with the boiler of comparative example 1, and boiler thermal efficiency improves 6-8%, thus effectively
Fuel cost is saved, for the boiler of powerful continuous burning, this is with significant economic benefit.
This written description discloses the present invention, including optimal mode using example, and also enables those skilled in the art
The manufacture and use present invention.It is of the invention can patentable scope be defined by the claims, and may include this field skill
Other examples that art personnel expect.If this other examples have not different from the structural elements of the literal language of claims
Element, or if this other examples include the equivalent structure element with the literal language of claims without substantial differences,
Then this other examples are intended within the scope of claims.In the case where not will cause inconsistent degree, by reference to
It will be incorporated herein in place of all references referred to herein.
Claims (10)
1. hot-water boiler is fired in a kind of vertical condensation one room, comprising: low NO (1), the symmetrical burner hearth of flame kernel (3), snake
Shape pipe convection heating surface (4), air preheater (5), energy-saving appliance (6) are discharged header (2) and ontology exhaust pass (7), special
Sign is that the coiled pipe convection heating surface (4) is Flag pattern heat surface structure type, using side wall membrane wall as flagpole.
2. boiler according to claim 1, which is characterized in that use side wall film in the coiled pipe convection heating surface (4)
Formula wall is as flagpole, and two sides membrane wall is in difference row's arrangement.
3. boiler according to claim 1 or 2, which is characterized in that flag formula heating surface of tubes uses single group or two groups of coiled pipes
As heating surface flag.
4. boiler according to any one of the preceding claims, which is characterized in that the coiled pipe convection heating surface (4) is adopted
It takes and becomes caliber etc. section design.
5. boiler according to any one of the preceding claims, which is characterized in that the boiler is that full fin panel casing is vertical
Structure.
6. boiler according to any one of the preceding claims, which is characterized in that the boiler designs for multiple hearth.
7. boiler according to claim 6, which is characterized in that the boiler is twin furnace or three chamber designs.
8. boiler according to any one of the preceding claims, which is characterized in that be integrated with denitration dress in the energy-saving appliance
It sets.
9. boiler according to claim 8, which is characterized in that be filled with denitrating catalyst in the nitrogen rejection facility.
10. according to boiler described in any one of preceding claims, which is characterized in that the applicable fuel of the boiler be selected from oil, gas,
One of coal dust, water-coal-slurry are a variety of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811184638.XA CN109186093A (en) | 2018-10-11 | 2018-10-11 | Fire hot-water boiler in a kind of vertical condensation one room |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184638.XA CN109186093A (en) | 2018-10-11 | 2018-10-11 | Fire hot-water boiler in a kind of vertical condensation one room |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110779206A (en) * | 2019-11-08 | 2020-02-11 | 哈尔滨锅炉厂有限责任公司 | Subcritical direct-current hot water boiler |
| CN115451396A (en) * | 2022-08-29 | 2022-12-09 | 中国船舶重工集团公司第七0三研究所 | Novel flag type economizer system in water pipe boiler tail flue |
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