CN107327827A - A kind of large-scale steam-water dual-purpose type boiler - Google Patents
A kind of large-scale steam-water dual-purpose type boiler Download PDFInfo
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- CN107327827A CN107327827A CN201710743499.9A CN201710743499A CN107327827A CN 107327827 A CN107327827 A CN 107327827A CN 201710743499 A CN201710743499 A CN 201710743499A CN 107327827 A CN107327827 A CN 107327827A
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- water
- superheater
- connecting tube
- stop valve
- steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/44—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
A kind of large-scale steam-water dual-purpose type boiler, belongs to boiler plant technical field.The present invention, which solves existing power plant and enterprise, to be needed heating to be respectively configured and the boiler that steams; or using carrying out the external heat supply of mode after steam-water heat exchanging after partial high pressure steam pressure-reducing again; to solve the heating problem in region, while the problem of equipment downtime length, the utilization rate that meet seasonal process steam and peak power generation requirements and exist are low, maintenance and the cost of overhaul are high, floor space is big.The bottom of afterbody economizer system is provided with feed-water inlet, the bottom of air preheater system is provided with air intlet and exhanst gas outlet, the top of air preheater system is provided with hot-blast outlet, the top of afterbody economizer system is connected by the second connecting tube with drum, saturated vapor export pipeline is also associated with drum, water return pipeline is connected with the import of superheater system, the exit of superheater system is connected with water supply header and collection vapour header.The present invention is used to heating, steam supply and power supply.
Description
Technical field
The present invention relates to a kind of large-scale steam-water dual-purpose type boiler, belong to boiler plant technical field.
Background technology
Recently as developing rapidly for national economy, country, which can consume, increasingly to be increased, and environmental problem becomes increasingly conspicuous.Country
Go into overdrive to readjust the energy structure, promote cleaning low-carbon energy, the renewable sources of energy, slow down coal electricity and build rhythm, the electric scale of coal of keeping under strict control.
Influenceed by local climate, typically there is the boiler of the heating period of 3~6 months, part power plant and enterprise configuration the northern area of China
Equipment should solve the heating problem in region, while the requirement that seasonal process steam and peak generate electricity also is met, therefore greatly
Some Enterprises are heating to be respectively configured and the boiler that steams, or are carried out again after steam-water heat exchanging using after partial high pressure steam pressure-reducing
The external heat supply of mode.This two ways has that equipment downtime is long, and utilization rate is low, the maintenance of equipment and the cost of overhaul
Height, floor space is big, the problems such as initial investment cost is high.
The content of the invention
The present invention is to need heating to be respectively configured and the boiler that steams to solve existing power plant and enterprise, or utilizes portion
The external heat supply of mode after steam-water heat exchanging is carried out again after dividing high steam decompression, to solve the heating problem in region, is met simultaneously
Seasonal process steam and peak power generation requirements and the equipment downtime length, the utilization rate that exist are low, safeguard and the cost of overhaul it is high,
The problem of floor space is big, and then there is provided a kind of large-scale steam-water dual-purpose type boiler.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem：
A kind of large-scale steam-water dual-purpose type boiler, it includes drum, burner hearth, furnace wall cooling, superheater system, afterbody and saves coal
Device system and air preheater system, wherein burner hearth, superheater system, afterbody economizer system and air preheater system
It is sequentially connected, the lower end of furnace wall cooling is connected by down-comer with drum, the upper end of furnace wall cooling passes through the first connecting tube
It is connected with drum, drum, down-comer, furnace wall cooling, the first connecting tube constitute natural convection loop, afterbody economizer system
Bottom is provided with feed-water inlet, and the bottom of air preheater system is provided with air intlet and exhanst gas outlet, air preheater system
The top of system is provided with hot-blast outlet, and the top of afterbody economizer system is connected by the second connecting tube with drum, on drum also
It is connected with saturated vapor export pipeline, the import of superheater system and is connected with water return pipeline, the exit of superheater system connects
It is connected to water supply header and collection vapour header.
Further, the superheater system is arranged according to boiler pressure, and wherein high voltage parameter boiler configures three groups
Intert arrangement two-stage desuperheating water system between superheater and two-stage desuperheating water system, three groups of superheaters and carry out desuperheat, to control master
Stripping temperature；Medium-pressure boiler, which is configured, uses one-level desuperheat water system between two-stage superheater and one-level Attemperation water system, two-stage superheater
System carries out desuperheat, to control Stream temperature degree；Low-pressure boiler configures primary superheater and one-level Attemperation water system.
Further, when boiler pressure parameter is middle pressure, the superheater system includes low temperature superheater, desuperheat
Water system and high temperature superheater, are connected between low temperature superheater and drum by parallel arrangement of 3rd connecting tube and the 4th connecting tube
Connect, first stop valve is respectively set in the 3rd connecting tube and the 4th connecting tube；Low temperature superheater and high temperature superheater it
Between connected by parallel arrangement of 5th connecting tube and the 6th connecting tube, wherein be provided with Attemperation water system in the 5th connecting tube,
The second stop valve, Attemperation water system and hyperthermia and superheating are provided with the 5th connecting tube between Attemperation water system and low temperature superheater
It is provided with the 5th connecting tube between device in the 3rd stop valve, the 6th connecting tube and is provided with the 4th stop valve；High temperature superheater
Outlet collection vapour header is connected with by the 7th connecting tube, the outlet of high temperature superheater is connected with water supply collection by the 8th connecting tube
It is provided with case, the 7th connecting tube in the 5th stop valve, the 8th connecting tube and is provided with the 6th stop valve；Water return pipeline
It is connected with low temperature superheater, the 7th stop valve is provided with the water return pipeline；The 8th is provided with saturated vapor export pipeline
Stop valve.
Further, the first electric control valve, the two ends point of first electric control valve are additionally provided with water return pipeline
The 9th stop valve has not been arranged in series, and the first electric control valve and two the 9th stop valves are arranged in parallel with the 7th stop valve.
Further, it is additionally provided with the first electric gate valve on saturated vapor export pipeline.
Further, Attemperation water system includes direct-contact desuperheater and the desuperheat water lines being arranged on direct-contact desuperheater, institute
State direct-contact desuperheater to be arranged in the 5th connecting tube, the second electric control valve is provided with the desuperheat water lines and positioned at second
Tenth stop valve at electric control valve two ends.
Further, air preheater system is pre- including upper strata air preheater, middle level air preheater and lower air
Hot device.
Further, afterbody economizer system includes lower floor's afterbody economizer and upper strata afterbody economizer.
The present invention has the following effects that compared with prior art：
1st, boiler can realize different pressures, and the medium of different temperatures is supplied simultaneously；
2nd, separate unit boiler can realize the function of two boilers, can switch between superheated steam, saturated vapor and hot water,
Switch to steam and heat supply in winter requirement needed for hot water side provides production；Superheated steam boiler is also can switch in addition, with full
The generating of sufficient peak period and process steam demand.On the one hand it can save that equipment front capital input, device systems are simple, it is empty to take up an area
Between it is small；On the other hand the utilization rate of equipment is improved, is realized and steamed and a variety of demands of steam supply by switching；
3rd, the operation maintenance of reduction, maintenance, running cost；
4th, boiler type and fuel tolerance are wide；
5th, by boiler overheating section caloric receptivity, (overheat heat absorption accounts for boiler effectively hot ratio：Low pressure cooker about 13.5%, medium-pressure boiler
About 18.4%, 27.4%) high-pressure boiler is about converted into the external heat supply of a heat hot water (220t high-temperature high-pressure boiler, after transformation
The external heat supply of superheating system is about 42MW, saves about 4,000,000 yuan of the investment of equipment), both meet heating and require, while saving equipment
Floor space..
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is working medium flow schematic diagram of the present invention.
Embodiment
Embodiment one：With reference to Fig. 1,2 explanation present embodiments, a kind of large-scale steam-water dual-purpose type boiler, it includes
Drum 1, burner hearth 2, furnace wall cooling 3, superheater system 4, afterbody economizer system 5 and air preheater system 6, wherein stove
Thorax 2, superheater system 4, afterbody economizer system 5 and air preheater system 6 are sequentially connected, the lower end of furnace wall cooling 3
It is connected by down-comer 7 with drum 1, the upper end of furnace wall cooling 3 is connected by the first connecting tube 8 with drum 1, drum 1, decline
Pipe 7, furnace wall cooling 3, the first connecting tube 8 constitute natural convection loop, the bottom of afterbody economizer system 5 be provided with feed water into
Mouth 10, the bottom of air preheater system 6 is provided with air intlet 11 and exhanst gas outlet, and the top of air preheater system 6 is set
Hot-blast outlet 13 is equipped with, the top of afterbody economizer system 5 is connected with drum 1 by the second connecting tube 9, is also connected with drum 1
Have and water return pipeline 15, the exit of superheater system 4 are connected with saturated vapor export pipeline 14, the import of superheater system 4
It is connected with water supply header 16 and collection vapour header 17.
Large-scale steam-water dual-purpose type boiler in the present invention, its main heating surface has：The burner hearth 2, (economizer of superheater system 4
System), afterbody economizer system 5 and air preheater system 6.Wherein：
Flue gas flow：Fuel produces high-temperature flue gas after being burnt in burner hearth 2, successively washes away the superheater in the exit of burner hearth 2
(i.e. afterbody erects the economizer system in flue and air preheat for system 4, afterbody economizer system 5 and air preheater system 6
Device system 6), last tail flue gas is discharged into air from chimney after treatment.
Working medium flow：The boiler of the present invention, its working medium flow is divided into two ways, and mode one produces superheated steam, mode
Two produce saturated vapor and hot water simultaneously.
Mode one：
Superheated steam system：Boiler is fed water the → 9 → pot of connecting tube of afterbody economizer system 5 → the second by feed-water inlet 10
Cylinder 1 → superheater system 4 → generation superheated steam enters collection vapour header 17, to meet generating and the process steam need of peak period
Ask.Wherein, superheater system 4 is arranged according to boiler pressure and temperature, and it includes superheater and Attemperation water system, high pressure
Parameter boiler configures three groups of superheaters and two-stage desuperheating water system；Medium-pressure boiler configures two-stage superheater and one-level desuperheat water system
System；Low-pressure boiler configures primary superheater and one-level Attemperation water system；
Mode two：
1st, saturated vapor system：Boiler fed water by feed-water inlet 10 → and the connecting tube 9 of afterbody economizer system 5 → the second →
Drum 1 → generation saturated vapor is supplied to pipe network, to meet process steam demand；
2nd, heating system：Entered by 15 backwater of water return pipeline → superheater system 4 (no Attemperation water system) → offer hot water
Enter to supply water header 16, to meet heat demand.
Air flow：Cold wind → steam air heater is (not shown in figure, or using mixing bellows, extraction section air preheater
The hot blast of outlet is mixing bellows mixing with cold wind.) → air preheater system 6 → burner air distribution outlet.
Burner hearth 2 uses full film type wall structure, and the fuel of boiler requires according to user, can be the coal of solid, or liquid
Fuel oil, and gaseous fuel, burner configured according to the characteristic and emission request of fuel.
Pipeline afterbody economizer and air preheater system 6, are responsible for heating feedwater and preheating cold air, are inhaled while reducing
Fume afterheat is received, exhaust gas temperature is reduced.
The second electric gate valve 37 is additionally provided with the export pipeline of collection vapour header 17, for controlling superheated steam to enter pipe network
On and off.
Superheater matches steel pipe according to the parameter of superheater, and tube bank is used and is arranged vertically, and sets hydrophobic and compressed air
Interface is purged, needs to carry out purging and hydrophobic to tube bank and header before working medium switching is carried out；During superheater heat hot water, using strong
System circulation, intraductal working medium is calculated by permissible velocity and is determined, and supply and return water temperature is higher than return water temperature 60~80 DEG C, and supply water pressure
Power is 2.0MPa or so.Notice that timing carries out pickling and flushing to superheater simultaneously, it is ensured that dirt in superheater vapour, it is ensured that equipment
Service life.
The present invention can realize the switching of superheated steam, saturated vapor and hot water supply.Enterprise cuts in generating peak phase
Shift to superheated steam and carry out steam supply generating, during heating in the winter time, can switch to saturated vapor and hot water to meet heat demand.Separately
Current Some Domestic small cogeneration enterprise is to generate electricity summer, heat supply in winter, by national energy structural adjustment and " 13
Planning " influence, Some Enterprises face is few because of the unit generation amount of configuration, and the low problem of energy utilization rate faces rectification problem of stopping doing business.This
The boiler of type can be rectified and improved by using the form of the present invention, farthest using the heating surface of former boiler, only need to increase
Plus a heat network system, carrying out local rectification to superheater header and carbonated drink fairlead can complete.For another conditions permit or chance
Special circumstances, also can switch to superheated steam steam supply, are generated electricity.Compared with newly constructed boiler, the quantities of transformation is few, the cycle
Short, infusion of financial resources is few.Other steam boilers can refer to the present invention, and steam boiler is changed into heating boiler.
Embodiment two：With reference to Fig. 1,2 explanation present embodiments, the superheater system 4 is according to Boiler Steam pressure
Power arranges that wherein high voltage parameter boiler, which is configured, interts arrangement between three groups of superheaters and two-stage desuperheating water system, three groups of superheaters
Two-stage desuperheating water system carries out desuperheat, to control Stream temperature degree；Medium-pressure boiler configures two-stage superheater and one-level Attemperation water system,
Desuperheat is carried out using one-level Attemperation water system between two-stage superheater, to control Stream temperature degree；Low-pressure boiler configuration one-level overheat
Device and one-level Attemperation water system.Other compositions are identical with embodiment one with annexation.
Embodiment three：With reference to Fig. 1,2 explanation present embodiments, when boiler pressure parameter is middle pressure, institute
Stating superheater system 4 includes low temperature superheater 4-1, Attemperation water system 4-2 and high temperature superheater 4-3, low temperature superheater 4-1 and pot
Connected between cylinder 1 by parallel arrangement of 3rd connecting tube 18 and the 4th connecting tube 19, the 3rd connecting tube 18 and the 4th connects
One the first stop valve 24 is respectively set in adapter 19；By parallel arrangement of between low temperature superheater 4-1 and high temperature superheater 4-3
5th connecting tube 20 and the 6th connecting tube 21 are connected, wherein Attemperation water system 4-2 is provided with the 5th connecting tube 20, desuperheat water system
The second stop valve 25, Attemperation water system 4-2 and height are provided with the 5th connecting tube 20 between system 4-2 and low temperature superheater 4-1
It is provided with the 5th connecting tube 20 between warm superheater 4-3 in the 3rd stop valve 26, the 6th connecting tube 21 and is provided with the 4th section
Only valve 27；High temperature superheater 4-3 outlet is connected with collection vapour header 17 by the 7th connecting tube 22, and high temperature superheater 4-3's goes out
Mouth is connected with water supply header 16, the 7th connecting tube 22 by the 8th connecting tube 23 is provided with the 5th stop valve 28, described
The 6th stop valve 29 is provided with 8th connecting tube 23；Water return pipeline 15 is connected with low temperature superheater 4-1, the water return pipeline 15
On be provided with the 7th stop valve 30；The 8th stop valve 31 is provided with saturated vapor export pipeline 14.It is so designed that, the 8th cut-off
Valve 31 is opened as the switch of control boiler saturated vapor under boiler steam-water dual-purpose type operating mode.Two the first stop valves 24 exist
Need to open in the case of producing superheated steam.7th stop valve 30 is opened under steam-water dual-purpose type operating mode.
By controlling the stop valve on each pipeline, to realize the different operating modes of boiler.When boiler steam-water dual-purpose type operating mode,
8th stop valve 31, the 7th stop valve 30, the 4th stop valve 27, the 6th stop valve 29 are opened, the cut-off of the first stop valve 24, second
Valve 25, the 3rd stop valve 26, the 5th stop valve 28 are closed；In the case that boiler needs to produce superheated steam, the first stop valve
24th, the second stop valve 25, the 3rd stop valve 26, the 5th stop valve 28 are opened, the 8th stop valve 31, the 7th stop valve the 30, the 4th
Stop valve 27, the 6th stop valve 29 are closed.Other compositions are identical with embodiment two with annexation.
Embodiment four：With reference to Fig. 1,2 explanation present embodiments, the first electric adjustable is additionally provided with water return pipeline 15
Valve 34 is saved, the two ends of first electric control valve 34 have been arranged in series the 9th stop valve 32, the first electric control valve 34 respectively
It is arranged in parallel with two the 9th stop valves 32 with the 7th stop valve 30.It is so designed that, the first electric control valve 34 is used to adjust
The flow of hot water under different load.Other compositions are identical with embodiment three with annexation.
Embodiment five：With reference to Fig. 1,2 explanation present embodiments, the is additionally provided with saturated vapor export pipeline 14
One electric gate valve 36.It is so designed that, is all the switch as control saturated vapor export pipeline 14 as the 8th stop valve 31,
Difference to adapt to pipeline is required.Other compositions are identical with annexation with embodiment three or four.
Embodiment six：With reference to Fig. 1,2 explanation present embodiments, Attemperation water system 4-2 includes direct-contact desuperheater 4-
21 are arranged on the 5th connecting tube with desuperheat the water lines 4-22, the direct-contact desuperheater 4-21 being arranged on direct-contact desuperheater 4-21
On 20, be provided with the desuperheat water lines 4-22 the second electric control valve 35 and positioned at the two ends of the second electric control valve 35
Ten stop valves 33.It is so designed that, the second electric control valve 35 and the tenth stop valve 33 are used to desuperheat water loop, adjust superheater
Vapor (steam) temperature, is only just opened in the case of boiler production superheated steam.Other compositions and annexation and embodiment five
It is identical.
Embodiment seven：With reference to Fig. 1,2 explanation present embodiments, it is pre- that air preheater system 6 includes upper layer of air
Hot device 6-1, middle level air preheater 6-2 and lower air preheater 6-3.It is so designed that, cold air sequentially passes through lower air
Preheater 6-3, middle level air preheater 6-2, upper strata air preheater 6-1, form hot blast and enter buner system.Other compositions
It is identical with embodiment one, two, three, four or six with annexation.
Embodiment eight：With reference to Fig. 1,2 explanation present embodiments, afterbody economizer system 5 includes lower floor's afterbody and saved
Coal device 5-1 and upper strata afterbody economizer 5-2.It is so designed that, boiler feedwater flows through lower floor's afterbody by feed-water inlet 10 and saved successively
Coal device 5-1, upper strata afterbody economizer 5-2 enter drum 1.Other compositions are identical with embodiment seven with annexation.
Claims (8)
1. a kind of large-scale steam-water dual-purpose type boiler, it is characterised in that：It include drum (1), burner hearth (2), furnace wall cooling (3),
Superheater system (4), afterbody economizer system (5) and air preheater system (6), wherein burner hearth (2), superheater system
(4), afterbody economizer system (5) and air preheater system (6) are sequentially connected, and the lower end of furnace wall cooling (3) is under
Drop pipe (7) is connected with drum (1), and the upper end of furnace wall cooling (3) is connected by the first connecting tube (8) with drum (1), drum
(1), down-comer (7), furnace wall cooling (3), the first connecting tube (8) constitute natural convection loop, afterbody economizer system (5)
Bottom is provided with feed-water inlet (10), and the bottom of air preheater system (6) is provided with air intlet (11) and exhanst gas outlet, empty
The top of air preheater system (6) is provided with hot-blast outlet (13), and the top of afterbody economizer system (5) passes through the second connecting tube
(9) it is connected, is also associated with drum (1) at saturated vapor export pipeline (14), the import of superheater system (4) with drum (1)
Water return pipeline (15) is connected with, the exit of superheater system (4) is connected with water supply header (16) and collection vapour header (17).
2. a kind of large-scale steam-water dual-purpose type boiler according to claim 1, it is characterised in that：The superheater system (4)
Arranged according to boiler pressure, wherein high voltage parameter boiler configures three groups of superheaters and two-stage desuperheating water system, three groups of overheats
Intert arrangement two-stage desuperheating water system between device and carry out desuperheat, to control Stream temperature degree；Medium-pressure boiler configure two-stage superheater and
Desuperheat is carried out using one-level Attemperation water system between one-level Attemperation water system, two-stage superheater, to control Stream temperature degree；Low pressure cooker
Stove configures primary superheater and one-level Attemperation water system.
3. a kind of large-scale steam-water dual-purpose type boiler according to claim 2, it is characterised in that：When boiler pressure parameter
During for middle pressure, the superheater system (4) includes low temperature superheater (4-1), Attemperation water system (4-2) and high temperature superheater (4-
3), connected between low temperature superheater (4-1) and drum (1) by parallel arrangement of 3rd connecting tube (18) and the 4th connecting tube (19)
Connect, one the first stop valve (24) of each setting on the 3rd connecting tube (18) and the 4th connecting tube (19)；Low temperature superheater (4-
1) it is connected between high temperature superheater (4-3) by parallel arrangement of 5th connecting tube (20) and the 6th connecting tube (21), wherein
Attemperation water system (4-2) is provided with 5th connecting tube (20), between Attemperation water system (4-2) and low temperature superheater (4-1)
The second stop valve (25) is provided with 5th connecting tube (20), between Attemperation water system (4-2) and high temperature superheater (4-3)
It is provided with five connecting tubes (20) in the 3rd stop valve (26), the 6th connecting tube (21) and is provided with the 4th stop valve (27)；High temperature
The outlet of superheater (4-3) is connected with collection vapour header (17) by the 7th connecting tube (22), and the outlet of high temperature superheater (4-3) leads to
Cross the 8th connecting tube (23) and be connected with water supply header (16), the 7th connecting tube (22) and be provided with the 5th stop valve (28),
The 6th stop valve (29) is provided with 8th connecting tube (23)；Water return pipeline (15) is connected with low temperature superheater (4-1), institute
State and the 7th stop valve (30) is provided with water return pipeline (15)；Saturated vapor export pipeline is provided with the 8th stop valve on (14)
(31)。
4. a kind of large-scale steam-water dual-purpose type boiler according to claim 3, it is characterised in that：Water return pipeline is also set on (15)
The first electric control valve (34) is equipped with, the two ends of first electric control valve (34) have been arranged in series the 9th stop valve respectively
(32), the first electric control valve (34) and two the 9th stop valves (32) are arranged in parallel with the 7th stop valve (30).
5. a kind of large-scale steam-water dual-purpose type boiler according to claim 3 or 4, it is characterised in that：Saturated vapor outlet
The first electric gate valve (36) is additionally provided with road (14).
6. a kind of large-scale steam-water dual-purpose type boiler according to claim 5, it is characterised in that：Attemperation water system (4-2) is wrapped
The desuperheat water lines (4-22) for including direct-contact desuperheater (4-21) and being arranged on direct-contact desuperheater (4-21), the direct-contact desuperheater
(4-21) is arranged in the 5th connecting tube (20), be provided with the desuperheat water lines (4-22) the second electric control valve (35) and
The tenth stop valve (33) positioned at the second electric control valve (35) two ends.
7. a kind of large-scale steam-water dual-purpose type boiler according to claim 1,2,3,4 or 6, it is characterised in that：Air preheat
Device system (6) includes upper strata air preheater (6-1), middle level air preheater (6-2) and lower air preheater (6-3).
8. a kind of large-scale steam-water dual-purpose type boiler according to claim 7, it is characterised in that：Afterbody economizer system (5)
Including lower floor's afterbody economizer (5-1) and upper strata afterbody economizer (5-2).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336493A (en) * | 2020-02-27 | 2020-06-26 | 西安交通大学 | Device and process method for producing low-temperature and low-pressure steam in power station boiler |
| CN112082147A (en) * | 2020-09-17 | 2020-12-15 | 东方菱日锅炉有限公司 | Low-pressure superheater system of waste heat boiler |
| CN117759918A (en) * | 2023-12-28 | 2024-03-26 | 克雷登工业有限公司 | Dual-purpose steam generator of overheat saturation |
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| CN106545833A (en) * | 2016-10-28 | 2017-03-29 | 杭州红山热电有限公司 | Boiler steam and water circuit |
| CN106871651A (en) * | 2017-02-08 | 2017-06-20 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel waste heat Optimum utilization system |
| CN207080980U (en) * | 2017-08-25 | 2018-03-09 | 哈尔滨哈锅锅炉容器工程有限责任公司 | A kind of large-scale steam-water dual-purpose type boiler |
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| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111336493A (en) * | 2020-02-27 | 2020-06-26 | 西安交通大学 | Device and process method for producing low-temperature and low-pressure steam in power station boiler |
| CN111336493B (en) * | 2020-02-27 | 2021-01-19 | 西安交通大学 | Device and process method for producing low-temperature and low-pressure steam in power station boiler |
| CN112082147A (en) * | 2020-09-17 | 2020-12-15 | 东方菱日锅炉有限公司 | Low-pressure superheater system of waste heat boiler |
| CN117759918A (en) * | 2023-12-28 | 2024-03-26 | 克雷登工业有限公司 | Dual-purpose steam generator of overheat saturation |
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Application publication date: 20171107 |