CN201540039U - Condenser enabling DC furnace start-up drainage and low-voltage bypass to share energy dissipating device - Google Patents
Condenser enabling DC furnace start-up drainage and low-voltage bypass to share energy dissipating device Download PDFInfo
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- CN201540039U CN201540039U CN2009200272246U CN200920027224U CN201540039U CN 201540039 U CN201540039 U CN 201540039U CN 2009200272246 U CN2009200272246 U CN 2009200272246U CN 200920027224 U CN200920027224 U CN 200920027224U CN 201540039 U CN201540039 U CN 201540039U
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Abstract
The utility model relates to a condenser enabling a DC furnace start-up drainage and a low-voltage bypass to share an energy dissipating device, which provides a mode which is safe and reliable and saves investment to realize a scheme of a DC furnace start-up drainage direct discharge condenser, wherein the scheme is generated in the starting process of a supercritical DC furnace. A single-hole or multihole DC furnace start-up drainage nozzle is additionally arranged at the position of the low-voltage bypass inlet of the condenser or at the position of a cylinder end cover. The nozzle is connected with a condenser shell or a low-voltage bypass inlet elbow by a sleeve and a connecting ring to reduce the heat stress to make the DC furnace start-up drainage and the low-voltage bypass share the same energy dissipating device. The utility model is suitable for all the DC furnace start-up systems with or without a start-up water circulating pump, all supercritical turbo generator units adopting the high and low voltage series bypass or the primary large bypass and all newly constructed units or the original in-service unit improvement adopting the atmospheric drain flash tank.
Description
(1) technical field: the utility model relates to a kind of direct current stove and starts the condenser that hydrophobic and low voltage bypass share energy dissipator.The direct current stove starts the startup that the supercritical DC furnace used in hydrophobic finger power station produces in start-up course hydrophobic; Low voltage bypass refers to before the reheat stop interceptor valve of the supercritical pressure turbine used from the power station bypass to condenser; Energy dissipator refers to be built in condenser throat the decompression temperature lowering effect, can avoid with pressing steam, band to press hydrophobic condenser pipe to condenser to produce harmful facility that impacts.The energy dissipator that energy dissipator that low voltage bypass is used and direct current stove start hydrophobic usefulness is provided by condenser supplier as portion's cover of condenser usually.
(2) background technology: the hydrophobic air suspended type flash vessel that is introduced into of the startup that the supercritical DC furnace that the prior art power station is used produces in start-up course, the steam that the dilatation flash distillation is come out enters atmosphere through the gland steam exhauster of air suspended type flash vessel, and saturation water is squeezed into condenser to reclaim working medium through drain tank, drainage pump.Start and hydrophobicly can be subjected to serious iron pollution during by the air suspended type flash vessel, hydrophobic iron-holder can become hundred times to exceed standard, if reclaim reluctantly, will cause the polishing unit short term failure of condensing, and ion exchange resin is scrapped in early days.Simultaneously, the steam that comes out because of the dilatation flash distillation enters atmosphere through the gland steam exhauster of air suspended type flash vessel, and it is hydrophobic approximately will to lose 30% startup.In the winter time, northern area enters the steam that carries water droplet of atmosphere through the gland steam exhauster of air suspended type flash vessel, can form sleet near the air suspended type flash vessel, makes terrace, platform, staircase icing, brings potential safety hazard.
Prior art also has the startup that supercritical DC furnace is produced in start-up course hydrophobic, reclaims working medium through an in line condenser of Backpack type pressure reducer and attemperator that is arranged in condenser throat.There have been some successful cases in this system, has avoided starting the hydrophobic serious iron pollution that can be subjected to during by the air suspended type flash vessel.But the decompression desuperheat ability of this Backpack type pressure reducer and attemperator (hydrophobic amount, hydrophobic inlet pressure, hydrophobic import enthalpy) need design according to maximum duty in the whole starting process, condenser supplier often feels design and is furnished with difficulty, puzzled, even refusal starts hydrophobic in line condenser scheme.
The weld seam that the Backpack type pressure reducer and attemperator combines with the condenser bigger thermal stress that is in operation can produce heat fatigue cracking after the operation for many years.
(3) summary of the invention:
The utility model direct current stove starts condenser that hydrophobic and low voltage bypass share energy dissipator at the low voltage bypass import position of condenser or cylindrical shell end cap position increases single hole or porous direct current stove starts hydrophobic nozzle, nozzle is connected to reduce thermal stress with condenser shell or low voltage bypass inlet bend with connecting ring through sleeve pipe, the direct current stove is started hydrophobicly share same energy dissipator with low voltage bypass.The utility model provides a kind of new technical scheme, with safe and reliable, the mode of reducing investment outlay realizes the scheme of the hydrophobic in line condenser of startup that supercritical DC furnace produces in start-up course, solve the difficulty of condenser supplier designs, manufacturing Backpack type pressure reducer and attemperator.
The direct current stove starts hydrophobic and low voltage bypass steam discharge homology, is derived from same pressure vessel---start separator.
The startup operating mode of each supercritical DC furnace all is subcritical behavior (about 8MPa), the water-cooling wall inlet is the water that temperature is lower than the saturation temperature under the starting pressure, the water-cooling wall outlet is vapour, the aqueous mixtures that reaches the saturation temperature under the starting pressure, this vapour, aqueous mixtures enter and start the separator separation, upwards the saturated vapor of discharging heats through superheater system, enter reheater system heat again behind the high pressure turbine by decompression desuperheat, and after low voltage bypass decompression desuperheat, the steam that exports to low voltage bypass is exactly our usually said low voltage bypass steam discharge.The saturation water that flows out is after starting the decompression of separator water level control valve downwards, and the saturation water that contains part vapour behind startup separator water level control valve is exactly that our usually said direct current stove starts hydrophobic.
The maximum of low voltage bypass displacement always starts the maximum of hydrophobic amount greater than the direct current stove.
The design capacity of low voltage bypass steam discharge is generally 30% to 35%BMCR (the highest continuous duty of boiler) or bigger flow, and the injection flow rate of adding high pressure turbine by and low voltage bypass is inevitable greater than 30%BMCR.The direct current stove starts hydrophobic maximum and is less than or equal to the capacity that starts electrically driven feed pump, is generally 25%BMCR to 30%BMCR.The through-current capability of energy dissipator that is arranged on the low voltage bypass of condenser throat is according to the maximum design of low voltage bypass displacement, this design load always starts the maximum of hydrophobic amount greater than the direct current stove, still neither one condenser supplier represents to design and arrange that the energy dissipator of the low voltage bypass of above-mentioned design capacity has hell and high water.
The common pressure of low voltage bypass steam discharge parameter is the saturated vapor of 0.7MPa.It is the saturation water that has part vapour of 0.7MPa that the direct current stove starts the hydrophobic common pressure of parameter.The enthalpy of low voltage bypass steam discharge always is significantly higher than the direct current stove and starts hydrophobic enthalpy, and the former enthalpy approximately is a times of the latter.
Low voltage bypass displacement and direct current stove start hydrophobic amount all can not reach maximum simultaneously under any operating mode, need not each self-configuring according to the energy dissipator of high parameter (flow pressure enthalpy) design separately, the most effective, most economical technical scheme is that the direct current stove starts hydrophobic and low voltage bypass share same energy dissipator.
The capacity that starts electrically driven feed pump is 30%BMCR, be greater than or equal to the minimum dc load (25%BMCR is to 30%BMCR) of supercritical DC furnace, as long as have the water of 30%BMCR or steam water interface to flow through water-cooling wall, just can guarantee the safety of water-cooling wall in the direct current stove start-up course.As previously mentioned, between the starting period that use to start water on the electrically driven feed pump, enter the vapour that starts separator, the total amount of aqueous mixtures is 30%BMCR, can be not many, the many water of vapour are just few, and the many vapour of water are just few, and both are complementary relationship.Change a kind of expression way, between the starting period that use to start water on the electrically driven feed pump, as steam turbine not red switch as yet, then low voltage bypass displacement and direct current stove start hydrophobic amount sum and are constantly equal to 30%BMCR; As steam turbine red switch admission, then in the steam turbine, the through-current capacity of low pressure (LP) cylinder adds the low voltage bypass displacement and add the direct current stove again and start hydrophobic amount sum and be constantly equal to 30%BMCR, at this moment, low voltage bypass displacement and direct current stove start hydrophobic amount sum must be less than 30%BMCR.When the capacity that starts electrically driven feed pump 30%BMCR can not satisfy direct current stove startup needs, need start-up flow and the higher steam feed pump of pressure head, start separator and be in dry state this moment, and it has been 0 that the direct current stove starts hydrophobic amount.
The above is exactly that the direct current stove starts the physical basis that hydrophobic and low voltage bypass can share an energy dissipator, an energy dissipator of pressing the maximum displacement of low voltage bypass, maximum pressure, the design of the highest enthalpy, after the startup of introducing direct current stove is hydrophobic, for this energy dissipator is light duty, starts the big more just underloading of the hydrophobic share that accounts for.
The utility model direct current stove starts condenser that hydrophobic and low voltage bypass share energy dissipator and both had been suitable for and does not have the direct current stove start-up system that starts boiler water circulating pump, also is applicable to the direct current stove start-up system that starts boiler water circulating pump.
The direct current stove start-up system that starts boiler water circulating pump is arranged when the startup boiler water circulating pump is working properly, it is hydrophobic to there is no a large amount of startups, only arrival etc. is in particular cases on time starting boiler water circulating pump fault or newly-built unit starting boiler water circulating pump, start the direct current stove, it is hydrophobic that a large amount of startups just can take place.At this moment, there is the direct current stove start-up system that starts boiler water circulating pump in fact to degenerate into and do not have the direct current stove start-up system that starts boiler water circulating pump.Starting the boiler water circulating pump fault is a small probability event, for being equipped with a cover air suspended type flash vessel, drain tank, drainage pump, this small probability event receives back and forth that the startup of serious iron pollution is hydrophobic loses more than gain really, to the supercritical DC furnace of 1000MW level, gross weight of equipment amounts such as supporting air suspended type flash vessel, the gland steam exhauster of air suspended type flash vessel, drain tank, drainage pump often surpass 200t.
The supercritical steam turbine unit that has adopts the big bypass of one-level, promptly from before the high pressure cylinder to the bypass of condenser, the big by-pass steam dump parameter of one-level is suitable with low voltage bypass steam discharge parameter, the saturated vapor that is about 0.7MPa, start at aforementioned direct current stove and hydrophobicly can share in whole argumentations of an energy dissipator with low voltage bypass, change low voltage bypass into one-level big bypass after conclusion stand good.So the utility model is suitable for the supercritical steam turbine unit that adopts the big bypass of one-level equally, i.e. direct current stove startup is hydrophobic share energy dissipator with the big bypass of one-level.The direct current stove starts hydrophobic and the big bypass of one-level and share the condenser of energy dissipator and belong to the utility model protection domain together.
The utility model direct current stove starts the condenser that hydrophobic and low voltage bypass share energy dissipator and both had been applicable to that new unit adopted in the design phase, can reduce cost, and the simplification system improves security of system; Also be applicable to original employing air suspended type flash vessel, drain tank, drainage pump at the labour unit, can avoid starting the hydrophobic serious iron pollution that is subjected to during by the air suspended type flash vessel.
The utility model direct current stove starts the condenser that hydrophobic and low voltage bypass share energy dissipator provides a kind of new technical scheme, with the most safe and reliable, the mode of reducing investment outlay most realizes the scheme of the hydrophobic in line condenser of startup that supercritical DC furnace produces in start-up course.Adopt benefit of the present utility model to be:
Start hydrophobic in line condenser and avoided starting the hydrophobic serious iron pollution that is subjected to during by the air suspended type flash vessel, safe and reliable.
Low voltage bypass displacement and direct current stove start hydrophobic amount all can not reach maximum simultaneously under any operating mode.Need not each self-configuring according to the energy dissipator of high parameter (flow pressure enthalpy) design separately.
The startup that any condenser that can accept the low voltage bypass steam discharge of 30%BMCR or more multithread amount must be accepted an any direct current stove supporting with it is hydrophobic.
The most effective, most economical technical scheme is that the direct current stove starts hydrophobic and low voltage bypass share same energy dissipator, realizes the scheme of the hydrophobic in line condenser of startup that supercritical DC furnace produces in start-up course.
The direct current stove starts hydrophobic and low voltage bypass and share energy dissipator and can advance hydrophobicly from homonymy, also can advance hydrophobic from offside.
Compare with the Backpack type pressure reducer and attemperator, design and layout are easier, and safety allowance is bigger, and investment more economizes.
Both being suitable for does not have the direct current stove start-up system that starts boiler water circulating pump, is applicable to the direct current stove start-up system that starts boiler water circulating pump yet.
Both be suitable for the supercritical steam turbine unit that adopts the bypass of high and low pressure tandem, be suitable for the supercritical steam turbine unit that adopts the big bypass of one-level too.
Both be applicable to that new unit adopted in the design phase, and can have reduced cost, the simplification system improves security of system; Also be applicable to original employing air suspended type flash vessel, drain tank, drainage pump at the labour unit, can avoid starting the hydrophobic serious iron pollution that is subjected to during by the air suspended type flash vessel.
(4) description of drawings:
The energy dissipator of Fig. 1 low voltage bypass
Fig. 1 is the energy dissipator of the low voltage bypass of certain 660MW four cylinders four exhaust turbine.This machine is furnished with 2 condensers, and every condenser is provided with the energy dissipator of a horizontal class long column shape two-stage volume-expanding pressure-reducing, design discharge 17.5%BMCR, pressure 0.7MPa, saturated vapor in its throat.
The low voltage bypass steam discharge is by the one-sided condenser that enters of throat.Cylindrical shell (4) is through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, to reduce thermal stress.Cylinder stent (8) is convenient to the hot axial expansion of cylindrical shell (4) than higher.
It is the φ 18mm weep hole of opening in cylindrical shell (4) bottom that bottom weep hole and angle steel block (7), and cylindrical shell is welded with 2 segment angle steel outward and blocks and make hydrophobic turning to, and is used to prevent the interior ponding of cylindrical shell (4).Bottom weep hole and angle steel block (7) has 2 places on each cylindrical shell (4).
Fig. 1 condenser throat part relevant of only drawing with the energy dissipator of low voltage bypass, the main body condenser pipe and the complete housing of condenser do not draw, signal condenser throat housing has only a side end panel (1) and a side end panel (2), the abbreviation that " side end panel " is actual to be " energy dissipator admission one side end panel of low voltage bypass ", " to side end panel " then are the abbreviations of " opposite side end plate relatively ".
The partial enlarged drawing of Fig. 2 Fig. 1
The low voltage bypass steam discharge is by the one-sided condenser that enters of throat.Cylindrical shell (4) is through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, to reduce thermal stress.In Fig. 1 to Fig. 6 all position Welding Structures that is marked with sleeve pipe (9) and connecting ring (10) roughly the same, purpose is and reduces thermal stress.
Fig. 3 embodiment one share import with low voltage bypass
Fig. 3 low voltage bypass steam discharge enters condenser through low side sway head (13) by a side end panel (2), low side sway head (13) horizontal, over against cylindrical shell (4) center line position, start hydrophobic nozzle (14) in low side sway head (13) outside through sleeve pipe (9) and connecting ring (10) and low side sway head (13) welding.Start hydrophobic nozzle (14) outlet flow area for starting 40% of drain pipe flow area, adjusting the hydrophobic nozzle of startup (14) outlet flow area can be that through-current capability reaches 30%BMCR under the 0.7MPa condition at the hydrophobic pressure of direct current stove startup, keep the hydrophobic nearly design load of pressure of startup, can force down the noise that causes because of the steam flash distillation.It is the φ 18mm weep hole of opening in cylindrical shell (4) bottom that bottom weep hole and angle steel block (7), and cylindrical shell is welded with 2 segment angle steel outward and blocks and make hydrophobic turning to, and is used to prevent the interior ponding of cylindrical shell (4).Bottom weep hole and angle steel block (7) has 2 places on each cylindrical shell (4).
The partial top view of Fig. 4 Fig. 3
The low voltage bypass steam discharge enters condenser through low side sway head (13) by a side end panel (2), low side sway head (13) horizontal, over against cylindrical shell (4) center line position, start hydrophobic nozzle (14) in low side sway head (13) outside through sleeve pipe (9) and connecting ring (10) and low side sway head (13) welding.
Fig. 5 embodiment two homonymies advance the hydrophobic independent interface that has
Fig. 5 low voltage bypass steam discharge enters condenser by a side end panel (2), cylindrical shell (4) corresponding site is opened slotted hole and the band hydrophobic nozzle of elbow (12) welding, the band hydrophobic nozzle of elbow (12) is provided with the hydrophobic interface of independent startup above the low voltage bypass interface, through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, the band hydrophobic nozzle of elbow (12) outlet flow area is for starting 40% of drain pipe flow area, the band hydrophobic nozzle of elbow (12) is made up of 60 ° of elbows and nozzle, nozzle is flattened by the elbow outlet and forms, and is called for short the band hydrophobic nozzle of elbow (12).
The band hydrophobic nozzle of elbow (12) is through sleeve pipe (9) and connecting ring (10) and end plate (2) welding, to reduce thermal stress.
It is the φ 18mm weep hole of opening in cylindrical shell (4) bottom that bottom weep hole and angle steel block (7), and cylindrical shell is welded with 2 segment angle steel outward and blocks and make hydrophobic turning to, and is used to prevent the interior ponding of cylindrical shell (4).Bottom weep hole and angle steel block (7) has 2 places on each cylindrical shell (4).
Fig. 6 embodiment three offsides advance hydrophobic
Fig. 6 is slidingly matched in (5) perforate of cylindrical shell end cap and porous hydrophobic nozzle (15), at circumferential uniform 3 sliding support plates (11) of porous hydrophobic nozzle (15) close end, porous hydrophobic nozzle (15) through sleeve pipe (9) and connecting ring (10) with to side end panel (1) welding, to reduce thermal stress.At the offside at low voltage bypass import position, made a new direct current stove and started hydrophobic import side end panel (1) and cylindrical shell end cap (5) being gone up perforate in the present embodiment.
Porous hydrophobic nozzle (15) is gone up circumferentially uniform 8 row φ 10mm weep holes, and the total flow area of this nozzle weep hole is for starting 40% of drain pipe flow area.It is the φ 18mm weep hole of opening in cylindrical shell (4) bottom that bottom weep hole and angle steel block (7), and cylindrical shell is welded with 2 segment angle steel outward and blocks and make hydrophobic turning to, and is used to prevent the interior ponding of cylindrical shell (4).Bottom weep hole and angle steel block (7) has 2 places on each cylindrical shell (4).
Leave necessary axial thermal expansion gap between baffle ring (16) and the cylindrical shell end cap (5), baffle ring (16) is used for stopping and the steam of overflowing from cylindrical shell end cap (5) perforate slit or hydrophobic of turning back.
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6:
1 pair of side end panel 2 one side end panel 3 curved roof
4 cylindrical shells, 5 cylindrical shell end caps, 6 arc support plates
7 bottom weep holes and angle steel block 8 cylinder stents
9 sleeve pipes, 10 connecting rings, 11 sliding support plates
The hydrophobic nozzle 13 low side sways hydrophobic nozzle of 14 startups of 12 band elbows
15 porous hydrophobic nozzles, 16 baffle rings
(5) specific embodiment:
The energy dissipator of low voltage bypass is arranged on condenser throat usually, is horizontal class long column shape two-stage or more multistage dilatation step-down energy dissipator, and its axis is parallel with the condenser pipe of condenser, single-ended admission.
The energy dissipator of Fig. 1 low voltage bypass is the energy dissipator of the low voltage bypass of certain 660MW four cylinders four exhaust turbine.This machine is furnished with 2 condensers, and every condenser is provided with the energy dissipator of a horizontal class long column shape two-stage volume-expanding pressure-reducing, design discharge 17.5%BMCR, pressure 0.7MPa, saturated vapor in its throat.
The low voltage bypass steam discharge enters condenser by a side end panel (2).Cylindrical shell (4) is through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, to reduce thermal stress.Cylinder stent (8) is convenient to the hot axial expansion of cylindrical shell (4) than higher.
The energy dissipator characteristic size:
Cylinder internal diameter 800mm, cylindrical shell length overall 8325mm, cylindrical shell perforate segment length 4968mm,
Number of aperture 714, aperture 18mm, perforate gross area 1816cm
2, the 60 ° of scopes in opening area cylindrical shell top,
The 2nd grade of nozzle flow area 17785cm that curved roof and cylindrical shell form
2
It is the φ 18mm weep hole of opening in cylindrical shell (4) bottom that bottom weep hole and angle steel block (7), and cylindrical shell is welded with 2 segment angle steel outward and blocks and make hydrophobic turning to, and is used to prevent the interior ponding of cylindrical shell (4).Bottom weep hole and angle steel block (7) has 2 places on each cylindrical shell (4).
The energy dissipator of Fig. 1 low voltage bypass is an example that structure is more brief, and there is rather different designs in different condenser suppliers, nearly 5 grades of the volume-expanding pressure-reducings that has, have in the perforate of cylindrical shell bottom, what have adds the spray desuperheating water, but also interosculates:
The energy dissipator of low voltage bypass is arranged on condenser throat usually, is horizontal class long column shape, two-stage or more multistage dilatation step-down energy dissipator, and its axis is parallel with the condenser pipe of condenser, single-ended admission.The common pressure of low voltage bypass steam discharge parameter is the saturated vapor of 0.7MPa.
The utility model direct current stove starts the condenser that condenser that hydrophobic and low voltage bypass share energy dissipator is applicable to different supplier's production, and the startup that any condenser that can accept the low voltage bypass steam discharge of 30%BMCR or more multithread amount must be accepted an any direct current stove supporting with it simultaneously is hydrophobic.
The direct current stove starts hydrophobic and low voltage bypass and share energy dissipator and can advance hydrophobicly from the same side, also can advance hydrophobic from offside.
Because the direct current stove starts the volume flow (be approximately 1: 3) of hydrophobic volume flow when reaching maximum when the low voltage bypass steam discharge reaches maximum, when the direct current stove starts the energy dissipator of hydrophobic introducing low voltage bypass, should pass through the nozzle of a single hole or porous, the perforate gross area of adjusting this nozzle can be that through-current capability reaches 30%BMCR under the 0.7MPa condition at the hydrophobic pressure of direct current stove startup.
Embodiment one share import with low voltage bypass and sees accompanying drawing Fig. 3
The low voltage bypass steam discharge is through 90 ° of elbows, be called for short low side sway head (13) and enter condenser by a side end panel (2), low side sway head (13) horizontal, over against cylindrical shell (4) center line position, start hydrophobic nozzle (14) in this low side sway head (13) outside through sleeve pipe (9) and connecting ring (10) and low side sway head (13) welding.Start hydrophobic nozzle (14) outlet flow area for starting 40% of drain pipe flow area, adjust and start hydrophobic nozzle (14) outlet flow area, can start hydrophobic pressure at the direct current stove is that through-current capability reaches 30%BMCR under the 0.7MPa condition, keep the hydrophobic nearly design load of pressure of startup, can force down the noise that causes because of the steam flash distillation.
The essence that embodiment one and low voltage bypass share the importing technology scheme is that to introduce the startup of direct current stove in a kind of mode of special-shaped t-bend condenser shell outside hydrophobic, and condenser and low voltage bypass energy dissipator thereof are not all done any adaptability revision.
Embodiment two homonymies advance hydrophobicly to have independent interface to see accompanying drawing Fig. 5
The low voltage bypass steam discharge enters condenser by a side end panel (2), cylindrical shell (4) corresponding site is opened slotted hole and the band hydrophobic nozzle of elbow (12) welding, the band hydrophobic nozzle of elbow (12) is provided with the hydrophobic interface of independent startup above the low voltage bypass interface, through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, the band hydrophobic nozzle of elbow (12) outlet flow area is for starting 40% of drain pipe flow area, the band hydrophobic nozzle of elbow (12) is made up of 60 ° of elbows and nozzle, nozzle is flattened by the elbow outlet and forms, and is called for short the band hydrophobic nozzle of elbow (12).
The band hydrophobic nozzle of elbow (12) is through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, to reduce thermal stress.
The band hydrophobic nozzle of elbow (12) outlet flow area is for starting 40% of drain pipe flow area, adjusting the hydrophobic jet expansion flow area of startup can be that through-current capability reaches 30%BMCR under the 0.7MPa condition at the hydrophobic pressure of direct current stove startup, keep the hydrophobic nearly design load of pressure of startup, can force down the noise that causes because of the steam flash distillation.
Present embodiment is provided with on condenser shell and starts hydrophobic independent interface, may more easily accept for conventional design person.The essence of present embodiment is to introduce the direct current stove in the mode of the threeway of cutting sth. askew to start hydrophobic in condenser shell.
Cylindrical shell (4) bottom section of 60 ° of elbows outside and corresponding nozzle can be subjected to stronger cavitation in the present embodiment, and suitable local pre-reinforcement is taken precautions against, as thickening in the easy pre-patch installing in cavitation position.
Embodiment three offsides advance the hydrophobic accompanying drawing Fig. 6 that sees
The condenser offside is nearer apart from boiler usually, and advancing by the condenser offside that the direct current stove starts hydrophobic and share energy dissipator with low voltage bypass also is good selection.Be slidingly matched in last perforate of cylindrical shell end cap (5) and porous hydrophobic nozzle (15), circumferential uniform 3 sliding support plates (11) at porous hydrophobic nozzle (15) close end place, porous hydrophobic nozzle (15) through sleeve pipe (9) and connecting ring (10) with to side end panel (1) welding, to reduce thermal stress.
Porous hydrophobic nozzle (15) is gone up circumferentially uniform 8 row φ 10mm weep holes, the total flow area of nozzle weep hole is for starting 40% of drain pipe flow area, adjusting weep hole general export flow area can be that through-current capability reaches 30%BMCR under the 0.7MPa condition at the hydrophobic pressure of direct current stove startup, and the fringe benefit that increases porous hydrophobic nozzle (15) is can alleviate to contain vapour hydrophobic cavitation effect and operation noise to cylindrical shell.Porous hydrophobic nozzle (15) enters cylindrical shell (4) from cylindrical shell end cap (5) side can not produce obviously influence to the maximum current capacity of low voltage bypass energy dissipator, because should significantly reduce by the axial steam flow in interval.
Leave necessary axial thermal expansion gap between baffle ring (16) and the cylindrical shell end cap (5), baffle ring (16) is used for stopping and the steam of overflowing from cylindrical shell end cap perforate slit or hydrophobic of turning back.Baffle ring (16) and porous hydrophobic nozzle (15) welding.
At the offside at low voltage bypass import position, made a new direct current stove and started hydrophobic import side end panel (1) and cylindrical shell end cap (5) being gone up perforate in the present embodiment.
The common technique feature that the foregoing description one, embodiment two, embodiment three have is that the direct current stove starts hydrophobic and low voltage bypass share energy dissipator.
Claims (3)
1. a direct current stove starts the condenser that hydrophobic and low voltage bypass share energy dissipator, it is characterized in that: be slidingly matched in last perforate of the cylindrical shell end cap (5) of cylindrical shell (4) and porous hydrophobic nozzle (15), circumferential uniform 3 sliding support plates (11) at porous hydrophobic nozzle (15) close end place, porous hydrophobic nozzle (15) through sleeve pipe (9) and connecting ring (10) with side end panel (1) is welded, porous hydrophobic nozzle (15) is gone up circumferentially uniform 8 row φ 10mm weep holes, the total flow area of nozzle weep hole is for starting 40% of drain pipe flow area, baffle ring (16) and porous hydrophobic nozzle (15) welding, cylindrical shell (4) bottom has φ 18mm weep hole, cylindrical shell is welded with the segment angle steel outward and blocks and make hydrophobic turning to, and the direct current stove is started hydrophobicly share same energy dissipator with low voltage bypass.
2. a direct current stove starts the condenser that hydrophobic and low voltage bypass share energy dissipator, it is characterized in that: in low side sway head (13) outside over against cylindrical shell (4) center line position, start hydrophobic nozzle (14) through sleeve pipe (9) and connecting ring (10) and low side sway head (13) welding, start hydrophobic nozzle (14) outlet flow area for starting 40% of drain pipe flow area, cylindrical shell (4) bottom has φ 18mm weep hole, cylindrical shell is welded with the segment angle steel outward and blocks and make hydrophobic turning to, and the direct current stove is started hydrophobicly share same energy dissipator with low voltage bypass.
3. a direct current stove starts the condenser that hydrophobic and low voltage bypass share energy dissipator, it is characterized in that: cylindrical shell (4) corresponding site is opened slotted hole and the band hydrophobic nozzle of elbow (12) welding, the band hydrophobic nozzle of elbow (12) is provided with the hydrophobic interface of independent startup above the low voltage bypass interface, through sleeve pipe (9) and connecting ring (10) and a side end panel (2) welding, the band hydrophobic nozzle of elbow (12) outlet flow area is for starting 40% of drain pipe flow area, cylindrical shell (4) bottom has φ 18mm weep hole, cylindrical shell is welded with the segment angle steel outward and blocks and make hydrophobic turning to, and the direct current stove is started hydrophobicly share same energy dissipator with low voltage bypass.
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| CN2009200272246U CN201540039U (en) | 2009-06-10 | 2009-06-10 | Condenser enabling DC furnace start-up drainage and low-voltage bypass to share energy dissipating device |
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| CN2009200272246U CN201540039U (en) | 2009-06-10 | 2009-06-10 | Condenser enabling DC furnace start-up drainage and low-voltage bypass to share energy dissipating device |
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| CN102175021A (en) * | 2011-01-27 | 2011-09-07 | 章礼道 | Pump-free direct current furnace starting system capable of recycling working medium and heat comprehensively |
| CN103775819A (en) * | 2014-02-26 | 2014-05-07 | 章礼道 | System for once-through boiler start-up drainage water and low voltage bypass shared energy dissipater |
| CN104727869A (en) * | 2013-12-23 | 2015-06-24 | 亿利资源集团有限公司 | Cogeneration unit and boiler starting and exhausted steam utilizing method thereof |
| CN110043335A (en) * | 2019-04-30 | 2019-07-23 | 北京龙威发电技术有限公司 | A kind of matched annular multistage reducing-and-cooling plant of turbine bypass system |
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2009
- 2009-06-10 CN CN2009200272246U patent/CN201540039U/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN102175021A (en) * | 2011-01-27 | 2011-09-07 | 章礼道 | Pump-free direct current furnace starting system capable of recycling working medium and heat comprehensively |
| CN102175021B (en) * | 2011-01-27 | 2013-04-03 | 章礼道 | Pump-free direct current furnace starting system capable of recycling working medium and heat comprehensively |
| CN104727869A (en) * | 2013-12-23 | 2015-06-24 | 亿利资源集团有限公司 | Cogeneration unit and boiler starting and exhausted steam utilizing method thereof |
| CN103775819A (en) * | 2014-02-26 | 2014-05-07 | 章礼道 | System for once-through boiler start-up drainage water and low voltage bypass shared energy dissipater |
| CN103775819B (en) * | 2014-02-26 | 2016-06-01 | 章礼道 | DC furnace start-up drainage and low voltage bypass share the system of energy dissipating device |
| CN110043335A (en) * | 2019-04-30 | 2019-07-23 | 北京龙威发电技术有限公司 | A kind of matched annular multistage reducing-and-cooling plant of turbine bypass system |
| CN110043335B (en) * | 2019-04-30 | 2023-09-01 | 北京国能龙威发电技术有限公司 | Annular multistage temperature and pressure reducing device matched with turbine bypass system |
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