CN106287763A - A kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam - Google Patents
A kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam Download PDFInfo
- Publication number
- CN106287763A CN106287763A CN201610639635.5A CN201610639635A CN106287763A CN 106287763 A CN106287763 A CN 106287763A CN 201610639635 A CN201610639635 A CN 201610639635A CN 106287763 A CN106287763 A CN 106287763A
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- CN
- China
- Prior art keywords
- steam
- low
- vapour source
- soot blower
- temperature reheater
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
Abstract
It is an object of the invention to provide a kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam, ejector includes high pressure nozzle, low-pressure nozzle, hybrid chamber, hybrid chamber throat and diffuser pipe composition.The inlet steam of finishing superheater is made mainstream fluid, can according to circumstances select arbitrary stock of low-temperature reheater inlet steam, high temperature reheater inlet steam or high temperature reheater outlet vapor as driving fluid.Mainstream fluid introduces from high pressure nozzle, and driving fluid enters hybrid chamber from low-pressure nozzle injection, and after the mixing and pressurization of ejector, the mixed vapour finally sprayed from diffuser pipe is as steam sootblower vapour source.The present invention can be according to the parameter design optimization emitter construction size of finishing superheater and two strands of steam of reheater, the parameter making mixed vapour meets the parameter request in soot blowing vapour source under various loading condictions, avoid simultaneously and be used alone the problem that final stage superheated steam is wasted as the high-quality steam existed during soot blowing vapour source, improve the economy of unit.
Description
Technical field
The present invention relates to station boiler steam blowing technique field, be specifically related to one and utilize low discharge final stage superheated steam
Soot blower vapour source apparatus.
Background technology
In the running of station boiler, in order to effectively remove the dust stratification of boiler heating surface, it is ensured that heating surface cleans,
Make heating surface heat-transfer effect good, need the heating surface at boiler to arrange different types, different types of soot blower.Wherein steam
Soot blower is the one of boiler sootblower, is also most widely used a kind of soot blower pattern.Steam is blown by station boiler at present
The selection in ash device vapour source, uses finishing superheater inlet steam mostly.But, finishing superheater outlet vapor is that High Temperature High Pressure is steamed
Vapour, vapour source dates is higher, need by pressure and temperature reducing station could for steam sootblower, and pressure and temperature reducing standing-meeting to steam produce
Raw irreversible restriction loss, it means that high-quality steam is wasted, and causes economy of power plant to lose, and the most this system is also
There is the problems such as the pressure reduction before and after regulation valve is big, valve is fragile.
Ejector is a kind of device utilizing high-pressure fluid draws low pressure fluid, and working fluid and driving fluid enter mixing
In room, carry out the exchange of quality and momentum, the most also with the rising of pressure.Ejector can improve driving fluid pressure and not
Directly consuming mechanical energy, meanwhile, there is not restriction loss, this is the performance that ejector is the most basic, and it has simple in construction, without turning
Dynamic component, operate the advantages such as easy to maintenance, and to being sucked medium fluid without being strict with, be therefore widely used in the energy
The fields such as power, petrochemical industry, refrigeration and industry thermal technology.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of soot blower utilizing low discharge final stage superheated steam
Vapour source apparatus.
Design of the present invention is: a kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam,
Including finishing superheater inlet steam 1, finishing superheater 2, soot blower vapour source 4, soot blower 5, boiler 6, ejector 7, low temperature again
The outlet of hot device 8, high temperature reheater 9, low-temperature reheater inlet steam 10, high temperature reheater inlet steam 11, high temperature reheater is steamed
Vapour 12, it is characterised in that: described ejector 7 is by high pressure nozzle 13, low-pressure nozzle 14, hybrid chamber 15, hybrid chamber throat 16, diffusion
Section 17 composition, described finishing superheater inlet steam 1 introduces from high pressure nozzle 13 as working fluid, and described low-temperature reheater enters
Mouth steam 10, high temperature reheater inlet steam 11 or high temperature reheater outlet vapor 12 draw from low-pressure nozzle 14 as driving fluid
Inject hybrid chamber 15, after the mixing and pressurization of ejector 7, the finally mixed vapour conduct of ejection from diffuser pipe 17
Steam sootblower vapour source 4.
Reheated steam can increase through described low-temperature reheater 8, the heating of high temperature reheater 9, vapor (steam) temperature, but by
In being affected by on-way resistance and local resistance, steam pressure can be gradually reduced, and therefore, steams compared to low-temperature reheater entrance
Vapour 10, the pressure of high temperature reheater inlet steam 11 is low, temperature is high, and the pressure of high temperature reheater outlet vapor 12 is lower, temperature
Higher, but when underrun, the pressure of above-mentioned three strands of steam is below soot blower required pressure parameter.Therefore, logical
During crossing the high steam injection low-pressure steam of finishing superheater 2, according to the temperature parameter requirement of soot blower 5, select to close
Suitable driving fluid, when soot blower 5 temperature required relatively low time select low-temperature reheater inlet steam 10 as driving fluid, when blowing
Ash device 5 temperature required higher time choose high temperature reheater inlet steam 11 or outlet vapor 12 as driving fluid.
Described ejector 7 can be by high-pressure fluid injection low-pressure fluid and do not consumes the device of mechanical energy.High-pressure spray
Body and low-pressure fluid can obtain pressure, euthermic steam upon mixing, can be by little by the structure optimizing ejector
The low-pressure steam of the big flow of high steam injection of flow, thus greatly reduce the steam consumption that final stage is overheated, improve unit
Economy.
Compared to the prior art, the invention have the advantages that
1, a kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam that the present invention provides, according to soot blower vapour
The parameter request in source 4, by the ejector action of ejector 7 by finishing superheater inlet steam 1 and low-temperature reheater inlet steam
10, one steam of high temperature reheater inlet steam 11 or high temperature reheater outlet vapor 12 uniformly mixes, according to ruuning situation
Select low-temperature reheater entrance, high temperature reheater inlet steam or one reheated steam any of high temperature reheater outlet flexibly,
Ensureing that mixed steam parameter meets on the premise of the vapour source dates of steam sootblower requires, using relatively low grade as far as possible
Steam.
2, as blowing after the high-quality steam of finishing superheater entrance is passed through the water saving measures such as pressure and temperature reducing by prior art
The vapour source of ash device, the pressure and temperature of high-quality steam is the highest, and the steam parameter that soot blower requires is relatively low, the pressure before and after throttling
Difference is relatively big, therefore can produce the biggest irreversible restriction loss.The one that the present invention provides utilizes low discharge final stage superheated steam
Soot blower vapour source apparatus, obtain suitable boiler sootblowing steam parameter by the mixing of high-low pressure steam, it is to avoid in prior art
The restriction loss that high-quality steam produces because of pressure and temperature reducing, is effectively increased the economy of unit.
3, in prior art due to before and after pressure and temperature reducing station 3 pressure reduction relatively big, pressure reduction amplitude before and after regulation valve reach 14～
15MPa, causes serious cavitation to regulation valve valve cage, spool, washes away, stop soot blower 5 owing to needing in soot blowing process constantly to throw, right
The regulation valve at pressure and temperature reducing station 3 causes severe attrition, a kind of soot blowing utilizing low discharge final stage superheated steam that the present invention provides
Device vapour source apparatus, by ejector by high-low pressure steam, and ejector is a kind of energy conversion device, will not be because of throttling
Effect produces erosion effect to equipment, thus significantly reduces the maintenance cost of equipment.
4, the finishing superheater inlet steam that the injector device employing of present invention offer is a small amount of is as working fluid, in a large number
The low-grade steam such as reheater steam as driving fluid, it is possible to realize the cascade utilization of energy, there is the most energy-conservation subtracting
Row's effect, and the equipment investment that prior art uses pressure and temperature reducing station is relatively big, the simple in construction of ejector of the present invention, low cost,
Easily install and safeguard.
Accompanying drawing explanation
Fig. 1 is the system schematic in prior art soot blower vapour source；
Fig. 2 is the system schematic of a kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam of the present invention；
Fig. 3 is the structure chart of ejector of the present invention.
In figure, 1-finishing superheater inlet steam；2-finishing superheater；3-pressure and temperature reducing station；4-soot blower vapour source；5-blows
Ash device；6-boiler；7-ejector；8-low-temperature reheater；9-high temperature reheater；10-low-temperature reheater inlet steam；11-high temperature
Reheater inlet steam；12-high temperature reheater outlet vapor；13-high pressure nozzle；14-low-pressure nozzle；15-hybrid chamber；16-mixes
He Qiang throat；17-hybrid chamber diffuser.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, as a example by certain subcritical 600MW unit, prior art uses the high-quality of finishing superheater 2 entrance
Steam 1 is as soot blower vapour source 4, but the pressure of finishing superheater inlet steam 1, temperature parameter (17.5MPa, 392 DEG C) are all
The highest, and the steam parameter (3MPa, 380 DEG C) that soot blower requires is relatively low, therefore, is dropped by the throttling action at pressure and temperature reducing station 3
Low steam parameter, thus reach the requirement in soot blower vapour source 4, the steam after pressure and temperature reducing is passed through soot blower 5, by soot blower 5
Remove the dust stratification on boiler heating surface, and the pressure reduction before and after pressure and temperature reducing is up to 16MPa, it is evident that what prior art used blows
There is the biggest restriction loss in ash device vapour source.
As shown in Figures 2 and 3, a kind of soot blower vapour source utilizing low discharge final stage superheated steam that the present invention provides fills
Put, including finishing superheater inlet steam 1, finishing superheater 2, soot blower vapour source 4, soot blower 5, boiler 6, ejector 7, low temperature
Reheater 8, high temperature reheater 9, low-temperature reheater inlet steam 10, high temperature reheater inlet steam 11, high temperature reheater export
Steam 12, it is characterised in that: described ejector 7 is by high pressure nozzle 13, low-pressure nozzle 14, hybrid chamber 15, hybrid chamber throat 16, expansion
Pressure section 17 forms, and described finishing superheater inlet steam 1 introduces from high pressure nozzle 13 as working fluid, described low-temperature reheater
Inlet steam 10, high temperature reheater inlet steam 11 or high temperature reheater outlet vapor 12 as driving fluid from low-pressure nozzle 14
Injection enters hybrid chamber 15, and after the mixing and pressurization of ejector 7, finally from diffuser pipe 17, the mixed vapour of ejection is made
For steam sootblower vapour source 4.
As it is shown on figure 3, the emitter construction figure that the present invention provides, the operation principle of ejector 7 is:
1, finishing superheater inlet steam 1 flows into high pressure nozzle 13 and carries out adiabatic expansion, heat energy and the potential energy of steam is turned
Turning to kinetic energy, along with the flow velocity that constantly reduces of steam pressure increases the most therewith, the pressure in the exit of high pressure nozzle 13 reaches
Minimum, now, the pressure of working fluid is less than the pressure of driving fluid, and therefore, low-temperature reheater inlet steam 10, high temperature are again
Hot device inlet steam 11 or high temperature reheater outlet vapor 12 can be inhaled into hybrid chamber 15 by low-pressure nozzle 14.
2, working fluid 1 and driving fluid are vigorously mixed in hybrid chamber 15, it is achieved momentum and energy exchange, fluid-mixing
Pressure and temperature reach uniform state in the exit of hybrid chamber throat 16.
3, the uniform fluid-mixing of pressure and temperature continues adiabatic compression in diffuser 17, and the kinetic energy of fluid is converted into gesture
Energy and heat energy, therefore the pressure and temperature of fluid-mixing finally gives to meet after the boosting, temperature-rise period of diffuser 17 and blows
The mixed vapour of ash device vapour source 4 parameter request.
Table 1 lists the parameter of each steam in the case of certain subcritical 600MW power plant underrun, uses finishing superheater
It is the working fluid of ejector 7 that inlet steam makees 1, and driving fluid can select corresponding reheater to steam according to the requirement of vapour source dates
Vapour, if the parameter request in vapour source is relatively low, then selection low-temperature reheater inlet steam 10 is as driving fluid, if the parameter in vapour source is wanted
Ask higher, select high temperature reheater inlet steam 11 or outlet vapor 12 the most successively.
The vapour source dates of this Steam Soot-Blower System requires it is that pressure is more than 3MPa, temperature 380 DEG C-400 DEG C, as shown in table 1,
During performing low-load running of machine set, the pressure parameter of three kinds of reheaters is below the parameter request in described soot blower vapour source 4.Therefore, utilize
Ejector of the present invention uses a small amount of substantial amounts of reheated steam of finishing superheater steam ejection, obtains pressure and temp more after mixing
Suitably steam parameter, it is to avoid independent employing finishing superheater inlet steam 1 is as the restriction loss produced during vapour source, simultaneously
Take full advantage of the low-grade steam that reheater is imported and exported, there is significant effects of energy saving and emission reduction.
The present invention chooses finishing superheater inlet steam 1 and flows into from high pressure nozzle 13 as working fluid, chooses reheater
Steam enters hybrid chamber 15 as driving fluid by low-pressure nozzle 14 injection, by optimizing the structural parameters of design ejector 7, makes
Mixed steam pressure and temperature all reach the parameter request in soot blower vapour source 4.Ejector of the present invention is in actual operation
In journey respond well, reached intended purpose.
Claims (2)
1. a kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam that the present invention provides, enters including finishing superheater
Mouth steam (1), finishing superheater (2), soot blower vapour source (4), soot blower (5), boiler (6), ejector (7), low-temperature reheater
(8), high temperature reheater (9), low-temperature reheater inlet steam (10), high temperature reheater inlet steam (11), high temperature reheater go out
Mouth steam (12).
A kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam the most according to claim 1, its feature exists
In: described ejector (7) is by high pressure nozzle (13), low-pressure nozzle (14), hybrid chamber (15), hybrid chamber throat (16) and diffuser pipe
(17) composition, described finishing superheater inlet steam (1) flows into from high pressure nozzle (13) as working fluid, and described reheater enters
Outlet vapor is entered hybrid chamber (15) from low-pressure nozzle (14) by injection as driving fluid, a series of through ejector (7)
Mixing and pressurization, the mixed vapour finally sprayed from diffuser (17) is as steam sootblower vapour source (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610639635.5A CN106287763A (en) | 2016-08-06 | 2016-08-06 | A kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610639635.5A CN106287763A (en) | 2016-08-06 | 2016-08-06 | A kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106287763A true CN106287763A (en) | 2017-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610639635.5A Pending CN106287763A (en) | 2016-08-06 | 2016-08-06 | A kind of soot blower vapour source apparatus utilizing low discharge final stage superheated steam |
Country Status (1)
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| CN (1) | CN106287763A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300185A (en) * | 2017-05-27 | 2017-10-27 | 中国神华能源股份有限公司 | Shower nozzle and soot blower |
| CN111457450A (en) * | 2020-05-06 | 2020-07-28 | 大唐环境产业集团股份有限公司 | Thermoelectric decoupling system and working method |
-
2016
- 2016-08-06 CN CN201610639635.5A patent/CN106287763A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300185A (en) * | 2017-05-27 | 2017-10-27 | 中国神华能源股份有限公司 | Shower nozzle and soot blower |
| CN111457450A (en) * | 2020-05-06 | 2020-07-28 | 大唐环境产业集团股份有限公司 | Thermoelectric decoupling system and working method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
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| WD01 | Invention patent application deemed withdrawn after publication |