CN109630998A - A kind of high parameter waste heat boiler suitable for refuse incineration grate furnace - Google Patents
A kind of high parameter waste heat boiler suitable for refuse incineration grate furnace Download PDFInfo
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- CN109630998A CN109630998A CN201811409184.1A CN201811409184A CN109630998A CN 109630998 A CN109630998 A CN 109630998A CN 201811409184 A CN201811409184 A CN 201811409184A CN 109630998 A CN109630998 A CN 109630998A
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- flue
- water
- waste heat
- heat boiler
- refuse incineration
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- 239000002918 waste heat Substances 0.000 title claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 52
- 206010022000 influenza Diseases 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- 239000000779 smoke Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 239000010813 municipal solid waste Substances 0.000 description 7
- 238000004056 waste incineration Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000580063 Ipomopsis rubra Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- -1 alkali metal salt Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/48—Preventing corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
Abstract
The invention discloses the high parameter waste heat boilers for being suitable for refuse incineration grate furnace, horizontal flue or connection flue including water-cooled flue and back-end ductwork and between water-cooled flue and back-end ductwork, high-temperature level superheater surface is arranged in water-cooled flue, so that the superheated steam outlet temperature of high parameter waste heat boiler reaches 450~540 DEG C and pressure reaches 6.4MPa or more.The present invention is by rationally designing the position of boiler high temperature grade superheater, reheater heating surface and using effective anti-corrosion measure on heating surface surface, it effectively prevent heating surface high temperature corrosion and improves Boiler Steam parameter, the steam parameter of waste heat boiler can be improved to high temperature and pressure, super-pressure parameter and even further be promoted to efficient super-pressure.Further, reheater system is arranged in boiler, will be again heated to 540 DEG C from the relatively low steam of steam turbine high-pressure cylinder outlet temperature, obtains higher generating efficiency.
Description
Technical field
The present invention relates to the technical field of environment protection equipment of waste incineration, more particularly, are related to one kind and burn suitable for rubbish
Burn the high parameter waste heat boiler of grate furnace.
Background technique
With the development of economic and social life, city numbers and city size are all being continuously increased, association and come be
Domestic waste yield increases sharply, and biggish variation, traditional compost and sanitary landfills also has occurred in the ingredient of rubbish
Mode due to taking up a large area, percolate processing the problems such as presence, do not adapt to current domestic garbage was harmlessly treated
Requirement, and waste incineration has the advantages that treatment effeciency is high, occupied area is small and minimizing degree is high, generates in addition burning
The advantages of heat energy utilization, lime-ash backend resourcesization utilize and land price skyrocket factor, so that waste incineration and generating electricity increasingly obtains respectively
The favor of grade local government.
The main type of furnace one of of the grate incinerator as waste incineration and generating electricity, at home and abroad the application in market is more general at present
Time, but Cl, S chemical combination gas and eutectic that the chlorine due to containing in rubbish (Cl), sulphur (S) and alkali metal component generate after combustion
The alkali metal salt of point is domestic at present to boiler heating surface, the especially acid corrosion of high-temperature level heating surface and alkali metal etching problem
The garbage incinerator fire grate boiler parameter of external fortune is generally lower, and general control vapor (steam) temperature is no more than 400 DEG C, to reduce high temperature corruption
The risk of erosion, but the low parameter of boiler export steam influences the economic benefit of power plant but also the efficiency of refuse-burning plant reduces.
Mainly had using the general layout of the garbage burning boiler waste heat boiler of fire grate combustion system both at home and abroad at present vertical
Arrangement and horizontal arrangement two ways, the main distinction of two kinds of arrangements are the position of convection heating surface not
It together, but on the whole, is all the water cooling cigarette that the high-temperature flue gas for generation of burning on fire grate is first flowed through to arrangement water cooling evaporating heating surface
Superheater surface is arranged after smoke temperature is down to 650 DEG C or less in road again.Superheater all uses heat convection mode, and boiler goes out
Mouth main steam temperature reduces the risk of superheater high temperature corrosion at 400 DEG C or so, and such arrangement can effectively improve boiler fortune
Capable stability and safety, but boiler export steam parameter, especially vapor (steam) temperature are relative to same pressure rating generator
Group is at least 50 DEG C low (domestic conventional power unit is 450~485 DEG C), so that efficiency of generating unit at least reduces by 1 percentage point.
Summary of the invention
In order to solve the problems in the existing technology, the object of the present invention is to provide one kind can be by the steaming of waste heat boiler
Vapour parameter improves to high temperature and pressure (9.8MPa, 540 DEG C), super-pressure (13.7MPa/540 DEG C) parameter and is even further promoted and arrived
Efficient super-pressure (13.7MPa, 571 DEG C), may also set up outlet steam temperature in 400 DEG C or more of reheating steam system, obtains
Make the high parameter waste heat boiler suitable for refuse incineration grate furnace that unit efficiency increases substantially.
The present invention provides the high parameter waste heat boiler for being suitable for refuse incineration grate furnace, the high parameter waste heat boiler is
Horizontal arrangement or vertical, the level including water-cooled flue and back-end ductwork and between water-cooled flue and back-end ductwork
Flue or connection flue, high-temperature level superheater surface is arranged in the water-cooled flue, so that the high parameter waste heat boiler
Superheated steam outlet temperature reach 450~540 DEG C and pressure reaches 6.4MPa or more.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, the water
Cold smoke road is three flue structures, and a flue is connected with the exhanst gas outlet of refuse incineration grate furnace, three flues and the horizontal flue
Or connection flue is connected, for two flues between a flue and three flues, the high-temperature level superheater surface is arranged in two cigarettes
In road or two flues and three flues.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, high-temperature level
Reheater heating surface also is disposed in the water-cooled flue, so that reheated steam outlet temperature reaches 400 DEG C or more, wherein institute
Hot reheat device heating surface is stated to be arranged in two flues.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, high-temperature level
Superheater is divided into two-stage, and high-temperature level superheater surface and hot reheat device heating surface use pipe panelized construction, and tube panel is perpendicular
Straight arrangement is simultaneously parallel with the flow of flue gas direction in water-cooled flue, and steam upstream or downstream in tube panel flow.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, high-temperature level
The tube panel lower part of superheater surface and hot reheat device heating surface be pierced by from the bottom of water-cooled flue or middle part and top from
It is pierced by the top of water-cooled flue, part of the tube panel upper and lower part outside waste heat boiler is connected with header, connects with tube panel lower part
The header minimum point connect is provided with drain pipe.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, high-temperature level
The tube panel lower end of superheater surface and hot reheat device heating surface is fixed on water-cooled flue packet wall, and tube panel upper end is pierced by water
The part of cold smoke road packet wall is provided with expansion joint.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, the water
In cold smoke road arrange high-temperature level superheater surface and hot reheat device heating surface tube panel in working medium be parallel fluid flow or
Series flow.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, the water
Headroom between the tube panel of the high-temperature level superheater surface and hot reheat device heating surface arranged in cold smoke road is not less than
500mm, tube panel surface is laid with the nonmetallic materials of corrosion-and high-temp-resistant or heap is welded with the metal material of corrosion-and high-temp-resistant.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, the water
Low-temperature level superheater, cold reheater and water cooling evaporating heating surface, the back-end ductwork are disposed in flat flue or three flues
In be disposed with economizer.
One embodiment of the high parameter waste heat boiler suitable for refuse incineration grate furnace according to the present invention, the water
Horizontal flue or connection stack base between cold smoke road and back-end ductwork are funnel type structure and are provided with ash discharging hole.
Compared with prior art, the high parameter waste heat boiler that the present invention is suitable for refuse incineration grate furnace passes through rational design
The position of boiler high temperature grade heating surface simultaneously uses effective anti-corrosion measure on heating surface surface, is effectivelying prevent heating surface height
Boiler Steam parameter is improved in the case of warm etching problem and improves power plants generating electricity efficiency, according to related data, high temperature and pressure parameter
Efficiency of generating unit is higher than medium temperature and medium pressure unit by about 6%.
Detailed description of the invention
Fig. 1 shows the high parameter waste heat suitable for refuse incineration grate furnace according to an illustrative embodiment of the invention
The schematic view of the front view of boiler.
Fig. 2 shows the high parameter waste heats suitable for refuse incineration grate furnace according to an illustrative embodiment of the invention
The overlooking structure diagram of boiler.
Fig. 3 is shown more than the high parameter suitable for refuse incineration grate furnace of another exemplary embodiment according to the present invention
The schematic view of the front view of heat boiler.
Fig. 4 is shown more than the high parameter suitable for refuse incineration grate furnace of another exemplary embodiment according to the present invention
The overlooking structure diagram of heat boiler.
Description of symbols:
10- water-cooled flue, mono- flue of 11-, bis- flue of 12-, tri- flue of 13-, 20- horizontal flue, 30- connection flue, 40-
Back-end ductwork, 50- high-temperature level superheater surface are (if there is hot reheat device heating surface, for high-temperature level superheater surface
With hot reheat device heating surface), 51- expansion joint, 60- low-temperature level superheater, cold reheater and water cooling evaporation heating
Face, 61- ash discharging hole, 70- economizer.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Domestic and international existing refuse incineration grate furnace waste heat boiler at present, for the etching problem for mitigating high-temperature flue gas, boiler
Substantially all control is no more than 4MPa/400 DEG C to outlet vapor parameter.Pressure and temperature reduces, and the mechanical efficiency of steam turbine can be therewith
It reduces, the economic benefit of refuse-burning plant accordingly reduces.
In order to achieve the purpose that improve unit efficiency, the present invention proposes the high parameter waste heat for being suitable for refuse incineration grate furnace
Boiler, the waste heat boiler can be suitable for two kinds of engine general arrangement modes of vertical and horizontal arrangement simultaneously.
The present invention is described in detail for the high parameter waste heat boiler of refuse incineration grate furnace with reference to the accompanying drawing.
An exemplary embodiment of the present invention, the high parameter waste heat boiler suitable for refuse incineration grate furnace is sleeping
Formula arrangement or vertical, including water-cooled flue 10 and back-end ductwork 40 and between water-cooled flue 10 and back-end ductwork 40
Horizontal flue 20 or connection flue 30, high-temperature level superheater surface 50 is arranged in water-cooled flue 10, so that more than high parameter
The superheated steam outlet temperature of heat boiler reaches 450~540 DEG C and pressure reaches 6.4MPa or more.
Specifically, water-cooled flue 10 is three flue structures, and a flue 11 is connected with the exhanst gas outlet of refuse incineration grate furnace,
Three flues 13 and horizontal flue 20 connect flue 30 and are connected, and two flues 12 are between a flue 11 and three flues 13, specifically
High-temperature level superheater 50 can be arranged in the different location of water-cooled flue 10 according to the different arrangement forms of waste heat boiler.
Preferably, hot reheat device heating surface also is disposed in water-cooled flue 10, so that reheated steam outlet temperature reaches
To 400 DEG C or more, wherein hot reheat device heating surface is arranged in two flues 12.
The main steam condition of waste heat boiler of the present invention can achieve high temperature and pressure domestic mature at present (9.8MPa, 540
DEG C) or super-pressure (13.7MPa/540 DEG C) parameter, the high-temperature level superheater of boiler, (Temperature of Working is 400 for reheater heating surface
DEG C or more) be arranged in the water-cooled flue of waste heat boiler, using the relatively high flue gas of smoke temperature in water-cooled flue 10 make overheat, again
Hot steam heating, to obtain required Temperature of Working.According to smoke temperature feature, also further main steam condition further can be mentioned
It is raised to efficient super-pressure (13.7MPa, 571 DEG C), further increases unit efficiency.
Fig. 1 shows the high parameter waste heat suitable for refuse incineration grate furnace according to an illustrative embodiment of the invention
The schematic view of the front view of boiler, Fig. 2 shows according to an illustrative embodiment of the invention suitable for garbage incinerator fire grate
The overlooking structure diagram of the high parameter waste heat boiler of furnace.
As depicted in figs. 1 and 2, in the present example embodiment, waste heat boiler uses horizontal arragement construction, high-temperature level overheat
Device is divided into two-stage and two-stage high-temperature level superheater surface is arranged in two flues 12 and three flues 13, if being provided with high temperature
Grade reheater heating surface, then also be disposed in two flues 12.
High-temperature level superheater surface and hot reheat device heating surface use pipe panelized construction, and tube panel is arranged simultaneously vertically
It is parallel with the flow of flue gas direction in water-cooled flue 10, it is parallel with flue gas flow direction to be washed away to avoid the direct of flue gas.In order to keep away
Exempt from corrosive elements in flue gas and high temperature corrosion is generated to heating surface, tube panel surface is laid with the nonmetallic materials of corrosion-and high-temp-resistant
(such as refractory material) or heap are welded with the metal material (such as nickel based metal) of corrosion-and high-temp-resistant so that heating surface surface not with cigarette
Gas directly contacts, and effectively avoids flue gas corrosion.
Wherein, the tube panel lower part of high-temperature level superheater surface from the bottoms of two flues of water-cooled flue 10 and three flues or
Middle part is pierced by and top is pierced by the top of two flues and three flues of water-cooled flue 10, the lower part of hot reheat device heating surface
It is pierced by from the bottom of two flues of water-cooled flue 10 or middle part and top is pierced by the top of two flues of water-cooled flue 10, tube panel
Part of the upper and lower part outside waste heat boiler is connected with header.The header minimum point connecting with tube panel lower part is provided with hydrophobic
The condensed water generated in boiler startup and furnace shutting down process is discharged pipe, guarantees the condensed water and water in boiler start/ stop stage in tube panel
Pressure test water can be emptied completely.The tube panel lower end of high-temperature level superheater surface and hot reheat device heating surface is fixed on
On 10 packet wall of water-cooled flue, the part that tube panel upper end is pierced by 10 packet wall of water-cooled flue is provided with expansion joint, with absorb tube panel with
Differential expansion between water-cooled flue packet wall, avoids the dust-laden in flue gas from entering inside expansion joint.
Working medium in the tube panel of the high-temperature level superheater surface and hot reheat device heating surface arranged in water-cooled flue 10
It can be parallel fluid flow, or series flow, i.e. steam can also be one from a screen or a few screens with once-through tube panel
Group, successively upstream or downstream flow steam between each group tube panel.
In addition, the pipe for the high-temperature level superheater surface and hot reheat device heating surface arranged in control water-cooled flue 10
Headroom between screen is not less than 500mm, in order to service personnel's entrance.Horizontal cigarette between water-cooled flue 10 and back-end ductwork 40
20 bottom of road is funnel type structure and is provided with ash discharging hole 61, to collect and be discharged the fallout in flue, reduces to enter saving coal
The flying dust amount of device and deduster.
Also, be located at three flues, 13 downstream horizontal flue 20 in be disposed with low-temperature level superheater, cold reheater and
Water cooling evaporating heating surface 60 can further decrease horizontal flue outlet smoke temperature, the boiling degree of economizer exit working medium is controlled
In the range of safety；Economizer 70 is disposed in back-end ductwork 40, to make full use of waste heat.
Fig. 3 is shown more than the high parameter suitable for refuse incineration grate furnace of another exemplary embodiment according to the present invention
The schematic view of the front view of heat boiler, what Fig. 4 showed another exemplary embodiment according to the present invention is suitable for waste incineration
The overlooking structure diagram of the high parameter waste heat boiler of grate furnace.
As shown in Figure 3 and Figure 4, in the present example embodiment, waste heat boiler uses vertical structure, high-temperature level overheat
Device and hot reheat device are all arranged vertically in two flues 12, high-temperature level superheater surface and hot reheat device heating surface
Using pipe panelized construction, tube panel is arranged and parallel with the flow of flue gas direction in water-cooled flue 10 vertically, flat with flue gas flow direction
Row can directly washing away to avoid flue gas.In order to avoid corrosive elements generate high temperature corrosion, tube panel table to heating surface in flue gas
Face is laid with the nonmetallic materials (such as refractory material) of corrosion-and high-temp-resistant or heap is welded with the metal material of corrosion-and high-temp-resistant
(such as nickel based metal) effectively avoids flue gas corrosion so that heating surface surface does not contact directly with flue gas.
Wherein, the tube panel lower part of high-temperature level superheater surface and hot reheat device heating surface is from the two of water-cooled flue 10
The bottom or middle part of flue are pierced by and top is pierced by the top of two flues of water-cooled flue 10, and tube panel upper and lower part is in waste heat
Part outside boiler is connected with header, and the header minimum point connecting with tube panel lower part is provided with drain pipe, by boiler startup and
The condensed water discharge generated in furnace shutting down process guarantees that the condensed water in boiler start/ stop stage and the water pressure test have been reached with water energy in tube panel
Full emptying.The tube panel lower end of high-temperature level superheater surface and hot reheat device heating surface is fixed on 10 packet wall of water-cooled flue
On, the part that tube panel upper end is pierced by 10 packet wall of water-cooled flue is provided with expansion joint 51, to absorb tube panel and water-cooled flue packet wall
Between differential expansion, avoid the dust-laden in flue gas from entering inside expansion joint.
Similarly, the high-temperature level superheater surface and hot reheat device heating surface of arrangement in control water-cooled flue 10
Headroom between tube panel is not less than 500mm, in order to service personnel's entrance.Connection between water-cooled flue 10 and back-end ductwork 40
30 bottom of flue is funnel type structure and is provided with ash discharging hole 61, to collect and be discharged the fallout in flue, reduces to enter saving
The flying dust amount of coal device and deduster.
Also, low-temperature level superheater, cold reheater and water cooling evaporating heating surface 60 are disposed in three flues 13, it can be with
Flue outlet smoke temperature is further decreased, the boiling degree of economizer exit working medium is controlled in the range of safety；Back-end ductwork 40
In be disposed with economizer 70, to make full use of waste heat.
In conclusion waste heat boiler arragement construction proposed by the present invention, by rationally designing boiler high temperature grade heating surface
Position simultaneously uses effective anti-corrosion measure on heating surface surface, when effectivelying prevent heating surface High Temperature Corrosion,
Boiler Steam parameter is improved, power plants generating electricity efficiency is improved.According to related data, high temperature and pressure parameter efficiency of generating unit compares medium temperature
Middle press group is high by about 6%.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of high parameter waste heat boiler suitable for refuse incineration grate furnace, the high parameter waste heat boiler be horizontal arrangement or
Vertical, horizontal flue or connection including water-cooled flue and back-end ductwork and between water-cooled flue and back-end ductwork
Flue, which is characterized in that high-temperature level superheater surface is arranged in the water-cooled flue, so that the high parameter waste heat boiler
Superheated steam outlet temperature reach 450~540 DEG C and pressure reaches 6.4MPa or more.
2. the high parameter waste heat boiler for being suitable for refuse incineration grate furnace according to claim 1, which is characterized in that institute
Stating water-cooled flue is three flue structures, and a flue is connected with the exhanst gas outlet of refuse incineration grate furnace, three flues and the level
Flue or connection flue are connected, and between a flue and three flues, the high-temperature level superheater surface is arranged in two flues
In two flues or two flues and three flues.
3. the high parameter waste heat boiler for being suitable for refuse incineration grate furnace according to claim 2, which is characterized in that high
Warm grade reheater heating surface also is disposed in the water-cooled flue, so that reheated steam outlet temperature reaches 400 DEG C or more,
In, the hot reheat device heating surface is arranged in two flues.
4. the high parameter waste heat boiler for being suitable for refuse incineration grate furnace according to claim 3, which is characterized in that high
Warm grade superheater is divided into two-stage, and high-temperature level superheater surface and hot reheat device heating surface use pipe panelized construction, pipe
The vertical arrangement of screen is simultaneously parallel with the flow of flue gas direction in water-cooled flue, and steam upstream or downstream in tube panel flow.
5. being suitable for the high parameter waste heat boiler of refuse incineration grate furnace according to claim 3, which is characterized in that high-temperature level
The tube panel lower part of superheater surface and hot reheat device heating surface be pierced by from the bottom of water-cooled flue or middle part and top from
It is pierced by the top of water-cooled flue, part of the tube panel upper and lower part outside waste heat boiler is connected with header, connects with tube panel lower part
The header minimum point connect is provided with drain pipe.
6. being suitable for the high parameter waste heat boiler of refuse incineration grate furnace according to claim 5, which is characterized in that high-temperature level
The tube panel lower end of superheater surface and hot reheat device heating surface is fixed on water-cooled flue packet wall, and tube panel upper end is pierced by water
The part of cold smoke road packet wall is provided with expansion joint.
7. being suitable for the high parameter waste heat boiler of refuse incineration grate furnace according to claim 3, which is characterized in that the water
In cold smoke road arrange high-temperature level superheater surface and hot reheat device heating surface tube panel in working medium be parallel fluid flow or
Series flow.
8. being suitable for the high parameter waste heat boiler of refuse incineration grate furnace according to claim 3, which is characterized in that the water
Headroom between the tube panel of the high-temperature level superheater surface and hot reheat device heating surface arranged in cold smoke road is not less than
500mm, tube panel surface is laid with the nonmetallic materials of corrosion-and high-temp-resistant or heap is welded with the metal material of corrosion-and high-temp-resistant.
9. being suitable for the high parameter waste heat boiler of refuse incineration grate furnace according to claim 2, which is characterized in that the water
Low-temperature level superheater, cold reheater and water cooling evaporating heating surface, the back-end ductwork are disposed in flat flue or three flues
In be disposed with economizer.
10. the high parameter waste heat boiler according to claim 1 or claim 2 suitable for refuse incineration grate furnace, which is characterized in that institute
It states the horizontal flue between water-cooled flue and back-end ductwork or connection stack base is funnel type structure and is provided with ash discharging hole.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043888A (en) * | 2019-05-07 | 2019-07-23 | 哈尔滨锅炉厂有限责任公司 | Rubbish reheat boiler and the method for carrying out reheating |
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Application publication date: 20190416 |