CN103939923B - Strong sensing supersonic speed steam flow Steam Soot-Blower System - Google Patents
Strong sensing supersonic speed steam flow Steam Soot-Blower System Download PDFInfo
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- CN103939923B CN103939923B CN201410210177.4A CN201410210177A CN103939923B CN 103939923 B CN103939923 B CN 103939923B CN 201410210177 A CN201410210177 A CN 201410210177A CN 103939923 B CN103939923 B CN 103939923B
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Abstract
The present invention points to by force supersonic speed steam flow Steam Soot-Blower System and relates to a kind of the high temperature convection heating surface and half radiation heating surface that use accurate east coal �� shape boiler for power station, and employing steam is the high-efficiency cleaning system of working medium. the present invention comprises low-temperature reheater outlet header steam guiding tube, blow the total stopping valve in ash side, vapour source point, blow ash side, vapour source point and join vapour header, pendant superheater blows ash and joins vapour header admission valve, high temperature superheater blows ash and joins vapour header admission valve, high temperature reheater blows ash and joins vapour header admission valve, pendant superheater blows ash and joins vapour header, high temperature superheater blows ash and joins vapour header, high temperature reheater blows ash and joins vapour header, sootblower group start and stop valve, sootblower group is for the little header of vapour, supersonic speed steam flow nozzle, supersonic speed steam flow nozzle locating sleeve plate, ceiling pipe, ceiling pipe fin sheet, dcs, connecting tube, the long narrow rectangle that supersonic speed steam flow jet exit is band fillet is easily arranged between ceiling superheater and side enclosure wall superheater pipe, press close to the heating surface needing clear ash, a large amount of supersonic speed steam flow nozzle can be arranged on demand, there is the deashing ability of the Long travel steam sootblower far exceeding prior art.
Description
(1) technical field:
The present invention points to by force supersonic speed steam flow Steam Soot-Blower System and relates to a kind of the high temperature convection heating surface and half radiation heating surface that use accurate east coal �� shape boiler for power station, and employing steam is the high-efficiency cleaning system of working medium.
(2) background technology:
Since there being station boiler just to have steam sootblower, its structure last 100 years does not have big change.
The Steam Soot-Blower System that prior art is used for high temperature convection heating surface and half radiation heating surface comprises: total shut-off valve, steam pressure reducing station, connecting tube, manual maintenance segregaion valve, drain valve, Long travel steam sootblower, PLC (programmable logic controller); Superheater panel superheater outlet (19.3MPa563 DEG C) is taken from the vapour source of typical Long travel steam sootblower, latter 3.0MPa493 DEG C of steam pressure reducing station decompression; The interior pipe of Long travel steam sootblower is fixing, the admission valve that steam after decompression carries through manual maintenance segregaion valve and Long travel steam sootblower enters interior pipe, the internal surface of soot lance pipe scalable, that rotate moves with the outside surface of interior pipe and coordinates, and the gland packing box of annular keeps the tightness between interior pipe and soot lance pipe; The end of soot lance pipe is provided with 1 or 2 radial nozzles; The design steam flow of Long travel steam sootblower is generally 60kg/min to 120kg/min; Soot lance pipe is driven by electronic sport car to be sent in stove, and admission valve is opened, and blows ash and starts, reversing motion after rotation limit, soot lance pipe limit advance arrival limit position; Under PLC control, Long travel steam sootblower can continue back and forth operation for a long time, it is also possible to the reciprocal number of times working and specifying; Long travel steam sootblower is usually placed between each group of heating surface, provides a kind of probability to blow the function of ash to being arranged in its forward and backward heating surface.
The station boiler of prior art, when mixing burning standard east coal more than 40%, occurs that the slagging scorification of hearth combustor region is serious; Pendant superheater, high temperature superheater, high temperature reheater cigarette side stain, amass ash, blocking seriously; Funnel temperature raises, the phenomenons such as band portative power decline. As expected, 100% uses accurate east coal, and the usual way of prior art is doubled by the Long travel steam sootblower of configuration and runs continuously, and accurate east coal is long-term, the record of safe operation yet not to have station boiler 100% to use.
(3) summary of the invention:
Technical problem to be solved:
The operating pressure of the Long travel steam sootblower of prior art can not be too low, and pressure is low not only blows ash ability decline but also the increase of soot lance pipe amount of deflection, it is possible to contracting is not returned, and burns out soot lance pipe; Operating pressure can not be too high, the too high tightness being difficult to ensure ring seal stuffing box; Soot lance pipe can subtract thin gradually in running, the too high soot lance pipe working life of operating pressure also shortens; The Long travel steam sootblower of prior art must configure steam pressure reducing station operating pressure is fluctuated among a small circle for this reason.
The decompression process of steam in pressure reducing station, in terms of thermodynamics angle is one and waits enthalpy entropy to increase process, the ability making steam can be converted to speed energy by pressure in nozzle declines greatly, blow ash usefulness and also significantly decline.
The Long travel steam sootblower complex structure of prior art, maintenance workload is big, maintenance cost height, cost height; Roomy installation, operation, maintenance platform is needed to coordinate outside stove; 1 of the end of soot lance pipe or 2 radial nozzles are due to structural restriction, and nozzle efficiency is low; Due to structural limitation, the Long travel steam sootblower of prior art is difficult to manufacture the product being greater than 120kg/min.
For above-mentioned reasons, expect that energy 100% uses the boiler of accurate east coal, the Long travel steam sootblower of configuration doubles, arranging that the side wall of Long travel steam sootblower has been piled, sootblower runs the clean conditions that the long period that is also not sure keeps pendant superheater, high temperature superheater, high temperature reheater continuously.
Solve the technical scheme that its technical problem adopts:
The object that the present invention points to by force supersonic speed steam flow Steam Soot-Blower System is to provide a kind of the high temperature convection heating surface and half radiation heating surface that use accurate east coal �� shape boiler for power station, and employing steam is the high-efficiency cleaning system of working medium. Taking technological line unlike the prior art, solve the Long travel steam sootblower energy consumption height of prior art, clear ash usefulness is low, particularly uses 100% and can not keep convection heating surface and the problem of half radiation heating surface cleaning for a long time on the coal utility boiler of accurate east.
The present invention points to by force supersonic speed steam flow Steam Soot-Blower System and comprises low-temperature reheater outlet header steam guiding tube (1), blow the ash total stopping valve in side, vapour source point (2), blow ash side, vapour source point and join vapour header (3), pendant superheater blows ash and joins vapour header admission valve (4), high temperature superheater blows ash and joins vapour header admission valve (5), high temperature reheater blows ash and joins vapour header admission valve (6), pendant superheater blows ash and joins vapour header (7), high temperature superheater blows ash and joins vapour header (8), high temperature reheater blows ash and joins vapour header (9), sootblower group start and stop valve (10), sootblower group is for the little header of vapour (11), supersonic speed steam flow nozzle (12), supersonic speed steam flow nozzle locating sleeve plate (13), ceiling pipe (14), ceiling pipe fin sheet (15), dcs, connecting tube, supersonic speed steam flow nozzle (12) puts shape nozzle for the contracting that aerodynamic properties is good, import circle has set in nozzle cushion cap, throat is converted into the long narrow rectangle of band fillet, local velocity of sound is reached at throat's steam flow, continue raising speed at divergent segment steam flow and reach hypersonic speed, Outlet Section is the long narrow rectangle of band fillet, is easy to be arranged between the enclosure wall superheater pipe of between ceiling superheater tube or side, 2 to 6 supersonic speed steam flow nozzle (12) parallel connections are supersonic speed steam flow set of nozzles, by sootblower group for the little header of vapour (11) for vapour, each sootblower group start and stop valve (10) is by the control of dcs, control lasting blowing time and the interval time of each group of supersonic speed steam flow nozzle, the thermal deviation of heating surface can be compensated to a certain extent, it is to increase the operating safety of station boiler, the once lasting blowing time of each group supersonic speed steam flow nozzle is 30s to 120s, and 2 times blowing time is spaced apart 1h to 24h, blowing ash vapour source and take from low-temperature reheater outlet header steam guiding tube (1), this place's steam enthalpy is higher, and moderate pressure has higher isentropic enthalpy drop, and vapour is got at this place, and the impact of mass rate in the heating surface tube of low-temperature reheater is more even.
The beneficial effect of the invention:
The station boiler that �� solves prior art uses accurate east coal high temperature convection heating surface and half radiation heating surface stains, long-pending ash, block serious problem, it is provided that a kind of take steam as the high-efficiency cleaning system of working medium;
�� supersonic speed steam flow nozzle has high nozzle velocity coefficient, more effectively the pressure of steam can be converted to speed energy;
�� increases process without steam pressure reducing station without entropy, supersonic speed steam flow nozzle can obtain higher usable enthalpy drop, supersonic speed steam flow jet exit flow velocity can more than 1200m/s, the kinetic energy that same quality steam a has order of magnitude higher than the Long travel steam sootblower of prior art;
The long narrow rectangle that �� supersonic speed steam flow jet exit is band fillet is easily arranged between ceiling superheater and side enclosure wall superheater pipe, press close to the heating surface needing clear ash, a large amount of supersonic speed steam flow nozzle can be arranged on demand, there is the deashing ability of the Long travel steam sootblower far exceeding prior art;
�� supersonic speed steam flow nozzle has highly directive, and the supersonic speed steam flow set of nozzles being arranged on boiler penthouse is particularly suitable for getting through the long-pending ash of bridging type between heating surface;
�� can design large discharge supersonic speed steam flow nozzle on demand, it does not have the difficulty in technology;
�� supersonic speed steam flow nozzle movement-less part, manufacturing cost, running cost, maintenance cost are lower than the Long travel steam sootblower of prior art;
�� supersonic speed steam flow nozzle can be divided into 8 to 24 groups on demand along stove is wide, drop into during each component, control by DCS (dcs), control lasting blowing time and the interval time of each group of supersonic speed steam flow nozzle, the thermal deviation of heating surface can be compensated to a certain extent, it is to increase the operating safety of station boiler;
It is 30s to 120s that �� respectively organizes the once lasting blowing time of supersonic speed steam flow nozzle, and 2 times blowing time is spaced apart 1h to 24h, and its energy consumption is less than the Long travel steam sootblower of the prior art of operation continuously;
�� steam conveying pipe is shorter, and absolute altitude change is little, has from hydrophobic ability, and each group supersonic speed steam flow nozzle starts front without the need to hydrophobic program;
�� unit load is more high, and the deashing ability of strong sensing supersonic speed steam flow Steam Soot-Blower System is more strong, is conducive to machine set of long-period high loading to run;
�� points to by force the station boiler that supersonic speed steam flow Steam Soot-Blower System can also be used for using common bituminous coal, meager coal, brown coal, hard coal, not only there is manufacturing cost, running cost, advantage that maintenance cost is low compared with the Long travel steam sootblower of prior art, and the thermal deviation of heating surface can be compensated to a certain extent, it is to increase the operating safety of station boiler.
(4) accompanying drawing illustrates:
Fig. 1 is strong sensing supersonic speed steam flow Steam Soot-Blower System steam-supplying system figure.
Fig. 2 is the location and installation figure of supersonic speed steam flow nozzle on ceiling pipe.
In fig. 1 and 2:
1 low-temperature reheater outlet header steam guiding tube, 2 blow ash side, vapour source point total stopping valve,
3 blow ash side, vapour source point join vapour header, 4 pendant superheaters blow ash join vapour header admission valve,
5 high temperature superheaters blow that ash joins vapour header admission valve, 6 high temperature reheaters blow ash join vapour header admission valve,
7 pendant superheaters blow that ash joins vapour header, 8 high temperature superheaters blow ash join vapour header,
9 high temperature reheaters blow ash join vapour header, 10 sootblower group start and stop valves,
The 11 sootblower groups confession little headers of vapour, 12 supersonic speed steam flow nozzles,
13 supersonic speed steam flow nozzle locating sleeve plates, 14 ceiling pipes,
15 ceiling pipe fin sheets.
(5) embodiment:
Existing composition graphs 1 is with a 600MW grade, and the reheating �� type ultra supercritical station boiler using accurate east coal Stream temperature degree/reheat steam temperature degree 605 DEG C/623 DEG C is that example illustrates the optimal way realizing the present invention.
The present invention points to by force supersonic speed steam flow Steam Soot-Blower System and comprises low-temperature reheater outlet header steam guiding tube (1), blow the ash total stopping valve in side, vapour source point (2), blow ash side, vapour source point and join vapour header (3), pendant superheater blows ash and joins vapour header admission valve (4), high temperature superheater blows ash and joins vapour header admission valve (5), high temperature reheater blows ash and joins vapour header admission valve (6), pendant superheater blows ash and joins vapour header (7), high temperature superheater blows ash and joins vapour header (8), high temperature reheater blows ash and joins vapour header (9), sootblower group start and stop valve (10), sootblower group is for the little header of vapour (11), supersonic speed steam flow nozzle (12), supersonic speed steam flow nozzle locating sleeve plate (13), ceiling pipe (14), ceiling pipe fin sheet (15), dcs, connecting tube, supersonic speed steam flow nozzle (12) puts shape nozzle for the contracting that aerodynamic properties is good, import circle has set in nozzle cushion cap, throat is converted into the long narrow rectangle of band fillet, local velocity of sound is reached at throat's steam flow, continue raising speed at divergent segment steam flow and reach hypersonic speed, Outlet Section is the long narrow rectangle of band fillet, is easy to be arranged between the enclosure wall superheater pipe of between ceiling superheater tube or side, 2 to 6 supersonic speed steam flow nozzle (12) parallel connections are supersonic speed steam flow set of nozzles, by sootblower group for the little header of vapour (11) for vapour, each sootblower group start and stop valve (10) is by the control of dcs, control lasting blowing time and the interval time of each group of supersonic speed steam flow nozzle,, it is possible to compensate the thermal deviation of heating surface to a certain extent, it is to increase the operating safety of station boiler, the once lasting blowing time of each group supersonic speed steam flow nozzle is 30s to 120s, and 2 times blowing time is spaced apart 1h to 24h, blowing ash vapour source and take from low-temperature reheater outlet header steam guiding tube (1), this place's steam enthalpy is higher, and moderate pressure has higher isentropic enthalpy drop, and vapour is got at this place, and the impact of mass rate in the heating surface tube of low-temperature reheater is more even.
Low-temperature reheater outlet header steam guiding tube (1) get steam ports upwards, pipe connecting upwards pass the big bag of furnace roof after arrange blow ash the total stopping valve in side, vapour source point (2); Low-temperature reheater outlet header steam guiding tube (1) is divided into A, B both sides, and Fig. 1 only draws side wherein.
Pendant superheater blows that ash joins vapour header (7), high temperature superheater blows that ash joins vapour header (8), high temperature reheater blows the half that the length that ash joins vapour header (9) is respectively furnace width, each header is divided into A, B both sides, and Fig. 1 only draws side wherein.
Sootblower group start and stop valve (10) is quick electric metal seal ball valve, maximum operating temperature 580 DEG C, it is arranged on the big bag of furnace roof along stove width, every platform stove arranges sootblower group start and stop valve (10) totally 45, it is divided into 3 row, wherein pendant superheater row arrange 15, and high temperature superheater row arrange 17, and high temperature reheater row arrange 13.
Supersonic speed steam flow nozzle (12) is precision casting product, material is Martensite Stainless Steel 1Cr13, design flow 120kg/min (only single), every platform stove arranges supersonic speed steam flow nozzle (12) totally 180, all it is arranged in ceiling, wherein pendant superheater position arranges 60, and high temperature superheater position arranges 68, and high temperature reheater position arranges 52.
Supersonic speed steam flow nozzle locating sleeve plate (13), for fixing supersonic speed steam flow nozzle (12), is enough to the thrust of dynamic counter-force when bearing supersonic speed steam flow nozzle (12) work and connecting tube thermal expansion, and material is 12Cr1MoV.
Connecting tube material is 12Cr1MoV, total system is to blow the ash total stopping valve in side, vapour source point (2) as vertex, connecting tube after and before the valve has at least the downward hydraulic gradient of 5%, the flexibility that connecting tube is necessary, the connecting tube thermal distortion produced when being enough to absorb sootblower group start and stop valve (10) start and stop.
Claims (6)
1. one kind is pointed to by force supersonic speed steam flow Steam Soot-Blower System, it is characterized in that: comprise low-temperature reheater outlet header steam guiding tube (1), blow the ash total stopping valve in side, vapour source point (2), blow ash side, vapour source point and join vapour header (3), pendant superheater blows ash and joins vapour header admission valve (4), high temperature superheater blows ash and joins vapour header admission valve (5), high temperature reheater blows ash and joins vapour header admission valve (6), pendant superheater blows ash and joins vapour header (7), high temperature superheater blows ash and joins vapour header (8), high temperature reheater blows ash and joins vapour header (9), sootblower group start and stop valve (10), sootblower group is for the little header of vapour (11), supersonic speed steam flow nozzle (12), supersonic speed steam flow nozzle locating sleeve plate (13), ceiling pipe (14), ceiling pipe fin sheet (15), dcs, connecting tube, supersonic speed steam flow nozzle (12) puts shape nozzle for the contracting that aerodynamic properties is good, import circle has set in nozzle cushion cap, throat is converted into the long narrow rectangle of band fillet, local velocity of sound is reached at throat's steam flow, continue raising speed at divergent segment steam flow and reach hypersonic speed, Outlet Section is the long narrow rectangle of band fillet, is easy to be arranged between the enclosure wall superheater pipe of between ceiling superheater tube or side, 2 to 6 supersonic speed steam flow nozzle (12) parallel connections are supersonic speed steam flow set of nozzles, by sootblower group for the little header of vapour (11) for vapour, each sootblower group start and stop valve (10) is by the control of dcs, control lasting blowing time and the interval time of each group of supersonic speed steam flow nozzle, the thermal deviation of heating surface can be compensated to a certain extent, it is to increase the operating safety of station boiler, the once lasting blowing time of each group supersonic speed steam flow nozzle is 30s to 120s, and 2 times blowing time is spaced apart 1h to 24h, blowing ash vapour source and take from low-temperature reheater outlet header steam guiding tube (1), this place's steam enthalpy is higher, and moderate pressure has higher isentropic enthalpy drop, and vapour is got at this place, and the impact of mass rate in the heating surface tube of low-temperature reheater is more even.
2. one according to claim 1 points to by force supersonic speed steam flow Steam Soot-Blower System, what it is characterized in that described low-temperature reheater outlet header steam guiding tube (1) gets steam ports upwards, and pipe connecting arranges after upwards passing the big bag of furnace roof and blows the ash total stopping valve in side, vapour source point (2); Low-temperature reheater outlet header steam guiding tube (1) is divided into A, B both sides.
3. one according to claim 1 points to by force supersonic speed steam flow Steam Soot-Blower System, it is characterized in that described pendant superheater blows that ash joins vapour header (7), high temperature superheater blows that ash joins vapour header (8), high temperature reheater blows the half that the length that ash joins vapour header (9) is respectively furnace width, and each header is divided into A, B both sides.
4. one according to claim 1 points to by force supersonic speed steam flow Steam Soot-Blower System, it is characterized in that described sootblower group start and stop valve (10) is quick electric metal seal ball valve, maximum operating temperature 580 DEG C, is arranged on the big bag of furnace roof along stove width.
5. one according to claim 1 points to by force supersonic speed steam flow Steam Soot-Blower System, it is characterized in that described supersonic speed steam flow nozzle (12) is precision casting product, and material is Martensite Stainless Steel 1Cr13.
6. one according to claim 1 points to by force supersonic speed steam flow Steam Soot-Blower System, it is characterized in that described connecting tube material is 12Cr1MoV, total system is to blow the ash total stopping valve in side, vapour source point (2) as vertex, connecting tube after and before the valve has at least the downward hydraulic gradient of 5%, the flexibility that connecting tube is necessary, the connecting tube thermal distortion produced when being enough to absorb sootblower group start and stop valve (10) start and stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410210177.4A CN103939923B (en) | 2014-05-19 | 2014-05-19 | Strong sensing supersonic speed steam flow Steam Soot-Blower System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410210177.4A CN103939923B (en) | 2014-05-19 | 2014-05-19 | Strong sensing supersonic speed steam flow Steam Soot-Blower System |
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| CN103939923A CN103939923A (en) | 2014-07-23 |
| CN103939923B true CN103939923B (en) | 2016-06-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673399B (en) * | 2015-02-04 | 2016-10-19 | 中国华能集团清洁能源技术研究院有限公司 | A kind of soot blower in airflow bed gasification furnace and ash-blowing method |
| CN112393263B (en) * | 2020-09-03 | 2022-05-31 | 上海克莱德贝尔格曼机械有限公司 | Improve soot blowing system that air heater blockked up |
| WO2022141015A1 (en) * | 2020-12-29 | 2022-07-07 | 苏州西热节能环保技术有限公司 | Steam soot blowing apparatus, rotary air preheater, and steam jet parameter design method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9218922U1 (en) * | 1992-03-05 | 1996-02-29 | Schoppe Fritz | Flame tube boiler |
| CN201621714U (en) * | 2010-04-27 | 2010-11-03 | 李京斌 | Medium rotary acoustic soot blower |
| CN202012930U (en) * | 2011-03-31 | 2011-10-19 | 华电电力科学研究院 | Local soot blowing device of W-shaped flame boiler |
| CN202938321U (en) * | 2012-12-03 | 2013-05-15 | 唐山市金沙工贸有限公司 | Soot blower system of pulverized coal fired boiler |
| CN103047666B (en) * | 2012-12-20 | 2016-06-01 | 浙江省电力公司电力科学研究院 | A kind of boiler convection heating surface blows method and the device of ash |
| CN103234210B (en) * | 2013-03-22 | 2015-04-08 | 周庆芬 | Soot cleaning device |
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