CN101080606B - A rotary heat exchanger and a method of reducing leakage in a rotary heat exchanger - Google Patents
A rotary heat exchanger and a method of reducing leakage in a rotary heat exchanger Download PDFInfo
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- CN101080606B CN101080606B CN2006800004665A CN200680000466A CN101080606B CN 101080606 B CN101080606 B CN 101080606B CN 2006800004665 A CN2006800004665 A CN 2006800004665A CN 200680000466 A CN200680000466 A CN 200680000466A CN 101080606 B CN101080606 B CN 101080606B
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- fanning strip
- runner
- heat exchanger
- gas
- rotation heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
- F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
- F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
- F28D19/042—Rotors; Assemblies of heat absorbing masses
- F28D19/044—Rotors; Assemblies of heat absorbing masses shaped in sector form, e.g. with baskets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
- F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
- F28D19/047—Sealing means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
Direct gas leakage between the air outlet and gas inlet of heat exchangers is reduced by rotary providing a pressure device to draw air through ducts in a sector plate. The gas can be drawn through slots in the sector plate by a suction device arranged the opposite side of the sector plate from the rotor.
Description
Technical field
The present invention relates to a kind of rotation heat exchanger.
Background technology
Particularly, the present invention relates to the rotary regenerative heat exchanger (rotary regenerative heat exchanger) of rotary substrate formula (rotating matrix format), common as disclosed in patent US4124063, and the improvement of in patent US544113, describing in detail afterwards.These rotary substrate heat exchangers comprise: framework; This framework with housing; Can be in described housing around the runner of a rotation; Be installed in a plurality of heat exchange elements in the described runner; Be installed in first and second fanning strips of first and second axle heads of described runner; Respectively at described first and second axle heads and be arranged in gas access and delivery channel on the same radial side of described fanning strip; And respectively at described first and second axle heads and be arranged in air outlet slit and entry conductor on the described fanning strip radial side relative with delivery channel with described gas access.
Although with reference to air intake and delivery channel, the heat exchanger of the type also is used for two kinds of heat exchange between the gas with various, thereby has gas/gas heat exchanger rather than gas/air heat exchanger.These heat exchangers are generally used for for example reclaiming heat from discharging the gas configuration as the power station, and wherein air is another kind of medium, and this air is heated significantly, so the air of preheating can be used as the burner that combustion air is delivered to the power station.
But as shown, these heat exchangers also can be used for gas/gas mode, for example are used to discharge the purification of gas, to remove NOx and SOx gas.These rotation heat exchangers are the macrostructure of hundreds of ton of weighing traditionally.But mounting heat exchanger makes the axle horizontal of runner, but modal be that axle is vertically installed runner.So first and second fanning strips are upper and lower fanning strips.
For the heat exchanger of this universal class, a significant problem is arranged, be exactly the thermal migration of runner between the operating period.Conventional fanning strip has intrinsic rigidity, often this means that fanning strip all is provided with the hinge structure so that fanning strip can preset or adjust to certain location so that the shape of fanning strip adapts to the shape after runner heat moves up and down.The slit that is produced can be present between runner radial seal and the fanning strip, and this can cause undesirable leakage to increase.
US5443113 points out a kind of method that overcomes this thermal deformation problem, how described in detail from generally flat sheet material manufacturing and formed cold junction second fanning strip, comprise at least two longitudinal extension sector plate ribs, be protruding during second fanning strip surperficial cold wherein, and when runner is in operating temperature, mend mutually with the runner cold junction.Although the recessed characteristic that this patent emphasizes to realize end fanning strip is with when the work and the importance that shape better matches after the skew of heater rotor, it has also pointed out the simple static sealing plate structure in the runner hot junction.The character of this static sealing plate structure makes maintenance requirement low and be easy to further improvement, as described herein.
Fig. 6 of accompanying drawing shows a kind of existing rotor.Intake air pressure Pa i is greater than outlet air pressure Pa o, and Pao is greater than inlet gas pressure Pgi, and Pgi is greater than gas outlet pressure Pgo (Pai＞Pao＞Pgi＞Pgo).Therefore, between air outlet slit and gas access, there is directly leakage.It is lower that this causes rotating heat exchanger efficiency.
SU987295 discloses a kind of runner, wherein when the part runner through fanning strip following time, when gas side moves to air side air be extracted by through the runner compartment under the runner with flush away flue gas between this part runner enters the air side and any other abrasive particle.Sent back in the gas access by flushing gained air.So any direct leakage (because P
Ao＞P
Gi) can be with the gas that is rinsed combine and be sent to the gas access, promptly this is the alternative route between air outlet slit and the gas access for direct leakage.In addition, also require to reduce gas flow, and this can increase the gas flow from gas vent from gas vent.
JP9229577 discloses the runner of a kind of relative SU987295 with the plain mode operation.But the air that is rinsed is not to be admitted to the gas access, but sends into gas vent, causes the network between air outlet slit and the gas vent to leak, and heat exchanger efficiency descends.In addition, provide blower fan, to drive the runner part of air, from the gas side to the air side by process under fanning strip.Cause thus significantly increasing from the gas of gas vent.
Summary of the invention
A target of the present invention is to reduce directly to leak.
According to the present invention, a kind of rotation heat exchanger is provided, comprising:
Along the runner that rotating shaft extends, described runner has first and second axial end that are approximately perpendicular to axle respectively at the relative axle head of described runner, and around this axle;
First fanning strip have and the adjacent sealing surface of described first axial end, thereby described sealing surface extends through described first axial end with described first axial end in two; Wherein
Described first fanning strip limits the suction conduit that extends through described first fanning strip from described sealing surface; And
Described rotation heat exchanger comprises further and being set to by the pressure apparatus of a plurality of suction conduits from extracting gases between described sealing surface and described first end face that described a plurality of suction conduits are radially arranged along described first fanning strip.
By making gas flow pass through conduit in the sealing surface of first fanning strip, the direct leakage between air outlet slit and the gas access reduces.Pressure apparatus is preferably and is arranged in fanning strip and the sucktion fan runner opposite side.The suction that is provided should be less than main boiler fans.Must be by minimizing like this by the air flow rate of air blast and the processing of exhausting blower fan, use this system or boiler load is increased, make and on air on the side of heater or gas path, hold higher pressure and fall, and do not need to upgrade or replace much bigger also more expensive blower fan.
The gained gas that is extracted by pressure apparatus preferably is fed in the air outlet slit.Like this, by pressure differential P
Ao＞P
GiAny air that extracts can be extracted by inhaling conduit by pressure apparatus, and is redirected to air outlet slit.Direct leakage between air side and the gas side reduces.
This fanning strip preferably is arranged as and extends through runner shaft and pass runner diameter, and first axial end is divided into equal two halves.This conduit in the fanning strip preferably has groove, but by the groove extracting gases.
Gas can be by being arranged in runner first gas access of first axle head be fed in the runner, then by the output of first gas vent on second axle head of runner.First gas inlet duct and the first gas vent conduit can be arranged in the same radial side of first fanning strip.Second gas inlet duct and the second gas vent conduit can be arranged in first and second axle heads of runner, and on the relative radial side of first gas access and supravasal first fanning strip of first gas vent.Gas vent described here can be used for any gas, comprises for example air.Can deliver to shared outlet easily from the effluent of described pressure apparatus with from the gas of described second delivery channel.
Second axle head that the adjacent runner of second fanning strip can be arranged, it passes second axial end and directly relative with first fanning strip.This fanning strip preferably includes at least two longitudinal extension sector plate ribs, and this longitudinal extension sector plate ribs is extended away from described runner from described first fanning strip, is welded to the supporting construction rib, and this supporting construction rib is welded to the framework of rotation heat exchanger.This fanning strip is preferably formed by generally flat sheet material.The layout of this fanning strip provides the surface of being convenient to gas extraction.
Rotor walls preferably from first axial end through to second axial end, limit a plurality of heat transfer spaces on the circumferential array.Preferably fully extension of sealing face then makes at any given time, the direct fully also part separately of described fully relatively sealing surface of at least one the complete heat transfer space on the either side of axle.This area of section that can equal two adjacent heat transfer spaces by the scope of described sealing surface at least realizes.Each heat transfer space preferably roughly extends along the entire radius of runner.
Be configured as the fan-shaped of angle x for described first fanning strip, the radially angle between the wall extension that limits described heat transfer space should be less than x/2.
According to a further aspect in the invention, a kind of method of leaking in the rotary heat exchanger that reduces is provided, this method comprises from the space between fanning strip and the runner by a plurality of suction conduit driving gases of the described fanning strip of extend through, preferably utilize suction, described a plurality of suction conduits are radially arranged along described fanning strip.
Description of drawings
For making the present invention be easier to understand, provide following description with reference to accompanying drawing by example, wherein:
Fig. 1 is the perspective schematic view of rotary regenerative heat exchanger;
Fig. 2 is the three-dimensional transparent space frame figure that the rotation regenerative heater in various sealings crack is shown, and in the conventional rotation heat exchanger, produces the direct leakage to gas (air to gas) of the air that causes because of the pressure differential between two plumes by described sealing crack;
Fig. 3 is the three-dimensional transparent space frame figure of rotation regenerative heater, illustrates in the conventional rotation heat exchanger, the additional leakage from the air side of air preheater to gas side that produces because of the air of carrying secretly in the runner chamber;
Fig. 4 is the top of routine of heat exchanger shown in Figure 1 or the perspective schematic view of end fanning strip;
Fig. 5 is similar to the view of Fig. 4 according to the described improved top and bottom fanning strip of US5443113;
Fig. 6 is a fixed sectors plate shown in Figure 5 and through the cutaway view of runner, radial plate and the radial seal plate in this fanning strip following time.This layout illustrates modal layout on single old air preheater that seals;
Fig. 7 is the plan view that the double containment quoted as prior art in US5915339 is arranged;
Fig. 8 is the cutaway view that is similar to sealing arrangement shown in Figure 6, but shows another view that double containment is arranged among Fig. 7.
Fig. 9 is the cutaway view of one of them form of the present invention, and the situation of inhaling seal fan that increases is shown.
Figure 10 is the typical sketch of fossil fuel fired boiler, and the seal fan that increase is shown is spread the wider scope (wider view) of how to put by this unit and complete air loop and interrelated.
Figure 11 is the typical sketch of fossil fuel fired boiler, if illustrate add supercharging fire windward blower fan (boosted over-fire air fan) as combustion modifications reducing NOx, the seal fan of increase is spread to put and can how be arranged with wideer whole workshop and interrelate.
Figure 12 is the sketch of another layout of containing of the present invention, low leakage fan sealing system is shown how uses, and the leakage that is generally used for heating again from the gas/gas heater cold, saturated flue gas that the wet flue gas desulfurizing system of routine withdraws from is minimized.
Figure 13 illustrates the plan view of runner according to an embodiment of the invention.
The specific embodiment
At first with reference to Fig. 1, the type heat exchanger of rotary substrate shown in it, comprise framework 10, shell 12 is installed on this framework 10, be can be in shell 12 around the wheel set assembly 16 of vertical axis 14 rotations, wheel set assembly 16 comprises the perisporium 18 that is connected to wheel hub 15 by the substantial radial sealing plate, and wheel hub 15 is around axle 14.In the space of sealing plate and space bar 22, be placed with a plurality of heat exchange elements 24.Runner can by 26 rotor drive that schematically shown relatively slowly, be generally per minute one and change ground around axle 14 rotations.
Rotor drive is installed on the roof construction 38 that extends on diameter ground, and fanning strip is installed on the lower surface of this roof construction 38 on first.Similarly, second fanning strip 28 is installed on the structure 35, but invisible in Fig. 1.
Following fanning strip or be called second fanning strip 28 and be positioned at runner below, the lower shaft end of next-door neighbour's runner.The sealing plate of the outer surface of installation and runner 18 engagement in the newel post 30.Bottom structure 24 installs framework, fanning strip 28 under installing on the described bottom structure 24.Reference numeral 36 refers to and is used in the support that whole assembly is installed on any correct position.Catheter segment illustrates 40,42, and described conduit is used separately as the distally that makes hot gas be fed to fanning strip as shown in Figure 1 and passes through runner, and as being regained by the gas that heat exchanger cools off.Other conduit 44,46 illustrates on the sealing plate right side, as air being imported and derives heat exchanger.
This structure is standard very, its design be for example from the hot combustion gas of power station stove by contact heat-exchanging element 24 via the 40 downward feedings of hot gas entry conductor, heat exchange element 24 is heated thus.Leng Que combustion product withdraws from via delivery channel 42 a little.Simultaneously, the cold air that is used as the combustion air (combustion air) of stove is sent into by conduit 44 and is withdrawed from via conduit 46.Its heat exchanger plates top through being rotated by runner 19, these heat exchanger plates are given leaked-in air with their heat, thereby the temperature of these air rises.Hot-air is as the combustion air of stove then, and this significantly improves the thermodynamic property of whole device.Therefore, the upper end at the first fanning strip (not shown) place can be the hot junction of runner, and the lower end at second fanning strip, 28 places can be a cold junction.
In order to understand detailed nature of the present invention better, promptly be designed to reduce the leakiness of the air relevant to gas with heater, the most important thing is to understand the heterogeneity and the source of the heterogeneity of the leakage relevant with heater.Two kinds of dissimilar leakages are shown respectively in Fig. 2 and Fig. 3.
At first with reference to Fig. 2, wide bright hatched arrows illustrates the various path domains of air to the direct leakage of gas, and described direct leakage is through the various inevitable residual slit between various sealings and the corresponding sealing surface.Notice that the major leak path surrounds heater rotor fully, and comprise radial seal leakage (at heater hot and cold two ends) and the axial seal leakage and the hub area leakage that occur in vertical sealing place of passing the diameter two ends.Although description of the invention concentrates on the leakage that reduces in the radial seal, because this represents the highest leakage composition usually, principle described here is applied to axially and wheel hub sealing leak path equally.
Last shown in figure 2 more crooked slightly direct leakage paths is an air bypass, and before passing through axial seal forward, air bypass appears on the circumferential seal of runner cold junction on the air side.
Forward Fig. 3 to, when having kept Fig. 2 the arrow of direct leakage paths is shown, big rotational arrow represents to transmit component, and promptly at leisure when the air side of runner forwards gas side to, the air that produces because of the air of carrying secretly in the runner section is to the leakage of gas.But, notice that this only occurs in a wherein side of runner boss, at the opposite side of wheel hub, gas is sandwiched in the air side.Leak the outer time high leakage component of ordinary representation radial seal leakage owing to carry secretly, several examples of prior art are devoted to reduce or eliminate this carrying secretly.The various forms of this prior art is described in US3315729, US3338300, US3587723 and US4427054, all is water conservancy diversion with the air carried secretly from the runner flushing before runner forwards opposite side to from a side or the distinct methods of gas.But these methods all do not reduce direct leakage component especially, and the present invention then is devoted to this.
Referring now to Fig. 4, conventional following fanning strip 28 is shown.This time fanning strip 28 comprises fanning strip parts 41, and a plurality of stiffeners 43 are welded to fanning strip parts 41 on this.This is installed by independent, the adjustable vertical post 33 through the hole 35 in the bottom structure 24, the end of this post welding stiffener 43, and on adjustable mechanism separately, stop.So, the fanning strip structure can be adjusted at any time.For the air that prevents gas is overflowed, through bottom structure place sealing is set with the metal bellows 37 that is used to provide freedom of motion at bar.Because the unique device that supports fanning strip is in the arbitrfary point, on the fan-shaped case shape structure that must lean against it so that necessary rigidity to be provided.Sheets thus obtained thus 41 upper surface is not really flat usually, and must be processed into flat.On the fanning strip of top, repeat same layout.
For structure shown in Figure 5, according to US5443113, top board 41 welding at least two longitudinal extension sector plate ribs 45 are to its lower surface.Bottom structure 34 has similar upwardly extending bottom structure ribs 47.Rib 45 can be welded to fanning strip 41 and not significantly distortion satisfactorily.With the unit of such assembling, rib 45 is pressed on the rib 47, and is welded on it.In this installation process of plate 41 relative bottom structures 34, can before being welded together, rib 45,47 accurately determine the physical location of plate 41.Thereafter this structure does not need to adjust and process the end face of plate 41 substantially.Similarly building method is applied to heat, the cold two ends of heater top, the fanning strip at the end.About the present invention, the simple box structure that forms between various plates also forms desirable airtight conduit, by this conduit transport gas.
Above-mentioned all structures all be described as be in the top have runner first, the hot junction, have in the bottom second, cold junction.Be appreciated that first, the hot junction equally can be in the bottom.Similarly, runner can be installed with the axle beyond vertical, for example, can be level, and fanning strip lays respectively at a side and opposite side.
Consider ensuing Fig. 6, the prior art of fanning strip design as shown in Figure 5 and the most common use combination at any one time of single group radial seal of process fanning strip below are shown.Be schematic purpose, the pressure P of the intake air of air preheater is shown in the drawings together
Ai, from the pressure P of the outlet air of air preheater
Ao, and the pressure P of corresponding gas access of difference and outlet
GiAnd P
GoNote, owing to P in all air preheater applications
Ai＞P
Ao＞P
Gi＞P
Go, obviously directly the air leakage can be forced through residual sealing seam from the air side of runner to gas side, shown in the direction of arrow.
Fig. 7 illustrates and reduces one of this scheme of directly leaking, and guarantees that by the quantity of radial plate in the multiplication runner two radial plate and sealing are always arranged simultaneously under fan-shaped sealing plate.
The mechanism of this method operation illustrates in Fig. 8 better, wherein can find out, the synthetic mesophase gas pressure Pi between the sealing is between the air pressure on each end of runner usually.By this way, double containment plays the effect of labyrinth seal, and the pressure that has both reduced in single sealing falls, and also correspondingly reduces the amount of directly leaking.Although can further reduce this leakage by under fanning strip, guaranteeing more sealings at any time,, depend on how these extra modifications are implemented, this may cause heater pressure drops higher and ID or the increase of FD power of fan.
Fig. 9 illustrates an enforcement of the present invention, has wherein increased from the suction seal fan of the intermediate space extracting gases between the double containment shown in Figure 8.This inhales sealant flow by the groove extraction of a series of vary in diameter that distribute by the radical length along last fanning strip, as shown in Figure 9.After this, previously mentioned rectangular flow passage produces a desirable stream chamber, guides the suction sealant flow at the outer surface of inhaling sealant flow process runner roof construction and before advancing to the induced-draught fan inlet by this stream chamber.Afterwards, in of the present invention should the layout, come the outlet stream of self-priming seal fan to be led in the main pipe of getting back to the outlet air stream that has from the air preheater to the boiler.
Be appreciated that by increasing the amount that increases by the suction sealant flow of groove that extracts, do not inhale the original value under the situation about sealing relatively, can increase near the leakage air flow rate in the radial seal of air side.But equivalently, the intermediate pressure P that reduces between the sealing falls in the pressure of this increase
i, make this intermediate pressure slowly near gas side inlet pressure P
GiTherefore, when inhaling the sealant flow increase, fall, can find out it is P near the residual pressure in the radial seal of heater gas side
i-P
Gi, descend lentamente.Certainly, when applying enough suction sealant flows, intermediate pressure is become less than gas access pressure (that is P,
i＜P
Gi).In this case, can find out that in fact the direct leakage that radial seal is sewed on can reverse, make and to eliminate all radial seal leakage fully in theory.
Figure 13 illustrates the plane according to runner of the present invention, as shown in the figure, inhales conduit 20 and periodically is positioned at whole range along fanning strip, promptly is positioned at two of fanning strip in the radial direction.This plays the effect of the direct leakage on the whole length that reduces fanning strip.
Consider now Figure 10, this illustrates extra seal fan and spreads to put and how to interrelate by this unit wider scope with all air and gas return path.Attention, the application main benefit of this suction sealing as mentioned above are to reduce to reach the direct leakage of the air of thorough elimination on the fanning strip of the hot cold two ends of heater to gas.Therefore, along with this leakage is significantly reduced, for the identical overall flow rate of the flow direction with the air of the boiler that flows out the heater hot junction, must be by the also corresponding minimizing of flow rate of air blast and the distribution of air draught blower fan.Under many circumstances, the maximum generation capacity of this unit can be restricted or reduces because of the maximum air of one of all these blower fans or these blower fans or gas treatment capacity.If increase at the air of runner or any one pressure drop or the traffic requirement of gas side; this can become more and to worsen, and this increase renewal that is may be by heater not normal or that increase other device project such as improved gas burning system or be used to reduce the selective catalytic reactor (SCR) of NOx causes.
Thereby, adopt the extra suction seal fan described in the present invention can recover available blower fan work blank, thereby the needs that reduce load are minimized, prevent from simultaneously to change even to replace fully much bigger also more expensive air blast or air draught blower fan greatly.
Next with reference to Figure 11, in several possible mounting means of inhaling seal fan one is shown, and wherein this unit installation or renewal have the fiery windward combustion system (over-fire air firing system) of the device that produces as minimizing oxynitrides (NOx).In other is used, inhale seal fan and can be chosen as equally its output is directed to the primary air inlet of coal grinder (coal pulversing mill) of other place-for example.
At last, consider Figure 12, this patent is shown substitutes the representative sketch of arranging, be applied to be generally used for the conventional wet flue gas desulfurizing system gas/gas heater of reheating flue gas afterwards.Note, in this case, arranged low leakage fan, to flow and to forwarding to chimney after, extract its inlet gas and flow from the gas gas heater from the flue gas flow rate of reheating at it.Thereby in this case, this low leakage fan flow rate is that the groove of producing by boasting rather than pass through in the fanning strip shown in Figure 9 extracts, thus the direction of the leakage flow shown in this figure of reversing.
By increasing low leakage fan flow rate, the pressure of the gas between the double containment is compared its natural value of not hanging down leakage fan will slowly be increased.Therefore, along with low leakage fan flow rate increases, sealing load (P in this
i) near untreated gas access pressure (P
UgiThereby) slowly reduce being untreated and handling the direct leakage rate of gas (untreated to treated gas) in sealing.Adopt above-mentioned suction sealing, when low leakage fan flow rate increased enough, interior sealing load can be brought up to more than the pressure of gas access, thereby in fact eliminates all direct leakages on the runner.
At last, consider Figure 12, notice that this is the schematic diagram that GGH arranges, illustrates the typical stream arrangement among the conventional GGH simply.But, arrange that according to conduit the hot junction of gas gas heater both can be as shown in the figure in heater base, if more expensive pipeline is installed, also can be at the top of heater.Equivalently, although preferred viewpoint is shown usually, the present invention does not get rid of low leakage fan can flow through groove in the cold junction fanning strip.
Claims (19)
1. rotation heat exchanger comprises:
Along the runner that rotating shaft extends, described runner has first and second axial end that are approximately perpendicular to this rotating shaft respectively at the relative axle head of described runner, and around this rotating shaft;
First fanning strip have and the adjacent sealing surface of described first axial end, thereby described sealing surface extends through described first axial end with described first axial end in two; Wherein
Described first fanning strip limits a plurality of suction conduits that extend through described first fanning strip from described sealing surface, and described a plurality of suction conduits are radially arranged along described first fanning strip; And
Described rotation heat exchanger further comprises and being set to by inhaling the pressure apparatus of conduit from extracting gases between described sealing surface and described first axial end.
2. rotation heat exchanger according to claim 1, wherein said first fanning strip extends in the radial direction through described rotating shaft and at two, and described suction conduit is formed on described first fanning strip in two parts of extending in the radial direction.
3. rotation heat exchanger according to claim 1, further comprise first gas inlet duct and the first gas vent conduit and will be directed to conduit in described first gas vent by the gas that described suction conduit extracts, described first gas inlet duct and the first gas vent conduit be respectively at described first and second axle heads of described runner, and be arranged on the radial side of described first fanning strip.
4. rotation heat exchanger according to claim 3, when wherein working, the temperature of the gas on a described radial side of described first fanning strip is lower than the temperature of the gas on the relative radial side of described first fanning strip.
5. according to any described rotation heat exchanger in the aforementioned claim, wherein said pressure apparatus is an aspirator.
6. according to any described rotation heat exchanger among the claim 1-4, further comprise second fanning strip adjacent with second axle head of described runner, described second fanning strip extends through second axial end and directly relative with described first fanning strip.
7. according to claim 3 or 4 described rotation heat exchangers, further comprise:
At second gas inlet duct and the second gas vent conduit of described first and second axle heads of described runner, it is arranged on the radial side relative with delivery channel with described first gas access of described first fanning strip respectively.
8. rotation heat exchanger according to claim 7 wherein is sent to shared outlet from the effluent of described pressure apparatus with from the gas of the described second gas vent conduit.
9. according to any described rotation heat exchanger among the claim 1-4, further comprise framework, at least two longitudinal extension sector plate ribs of extending away from described runner from described first fanning strip and supporting construction rib, described first fanning strip is formed by generally flat sheet material, described at least two longitudinal extension sector plate ribs are connected to described first fanning strip, described supporting construction rib is directly connected to described framework, and described supporting construction rib is connected to described longitudinal extension sector plate ribs.
10. rotation heat exchanger according to claim 9, wherein said first fanning strip is welded to described at least two longitudinal extension sector plate ribs, described supporting construction rib and described longitudinal extension sector plate ribs are welded to each other, and described supporting construction rib is welded to described framework.
11. rotation heat exchanger according to claim 6, further comprise framework, at least two longitudinal extension sector plate ribs of extending away from described runner from described second fanning strip and supporting construction rib, described second fanning strip is formed by generally flat sheet material, described at least two longitudinal extension sector plate ribs are connected to described second fanning strip, described supporting construction rib is directly connected to described framework, and described supporting construction rib is connected to described longitudinal extension sector plate ribs.
12. rotation heat exchanger according to claim 11, wherein said first fanning strip is welded to described at least two longitudinal extension sector plate ribs, described supporting construction rib and described longitudinal extension sector plate ribs are welded to each other, and described supporting construction rib is welded to described framework.
13. according to any described rotation heat exchanger among the claim 1-4, wherein said runner is included in the wall of first axial end, described wall limits a plurality of adjacent heat transfer space that is connected with the corresponding heat exchanger channels that leads to second axial end, and, described wall is arranged in the mode of circumferential array, make that heat transfer space separately moves through described sealing surface one by one along with the relative rotation of runner with described first fanning strip; The scope of wherein said sealing surface makes that at any time at least one the complete heat transfer space on the either side of rotating shaft is all directly also fully relative with the part separately of described sealing surface.
14. rotation heat exchanger according to claim 13, wherein on the either side of described rotating shaft, the scope of described sealing surface equals the area of section of two adjacent heat transfer spaces at least.
15. rotation heat exchanger according to claim 13, wherein each heat transfer space roughly extends along the entire radius of described runner.
16. according to any described rotation heat exchanger among the claim 1-4, wherein said first fanning strip is configured as the fan-shaped of angle x, described runner comprises radially wall extension, and the angle between the described wall extension is less than x/2.
17. one kind is reduced the method for leaking in the rotation heat exchanger, comprise a plurality of suction conduit driving gases that pass through described first fanning strip of extend through from the space between first fanning strip and the runner, described a plurality of suction conduits are radially arranged along described first fanning strip.
18. method according to claim 17, described rotation heat exchanger has runner, described first fanning strip passes first axle head in the radial direction through the rotating shaft of described runner and at two, thereby with described first axle head in two, wherein said gas by from the space between described first fanning strip and the described runner roughly along the whole length drives of described first fanning strip.
19. according to claim 17 or the described method of claim 18, described rotation heat exchanger has runner, described first fanning strip passes first axle head in the radial direction through the rotating shaft of described runner and at two, thereby with described first axle head in two, wherein said gas is driven by the space between described first fanning strip and described runner and passes through described first fanning strip at two suction conduits that form in the radial direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0505869A GB2424471A (en) | 2005-03-22 | 2005-03-22 | Rotary heat exchanger with a sector plate featuring suction ducts |
| GB0505869.8 | 2005-03-22 | ||
| PCT/GB2006/001046 WO2006120371A1 (en) | 2005-03-22 | 2006-03-22 | A rotary heat exchanger and a method of reducing leakage in a rotary heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101080606A CN101080606A (en) | 2007-11-28 |
| CN101080606B true CN101080606B (en) | 2010-08-11 |
Family
ID=34531671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800004665A Active CN101080606B (en) | 2005-03-22 | 2006-03-22 | A rotary heat exchanger and a method of reducing leakage in a rotary heat exchanger |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101080606B (en) |
| GB (1) | GB2424471A (en) |
| WO (1) | WO2006120371A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2716636C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Method of compensation of deformation of high-temperature rotary disc heat exchanger |
| RU2716638C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Method of preventing deformation of high-temperature rotary disc heat exchanger |
| RU2716639C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | High-temperature rotary disc heat exchanger |
| RU2716640C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Silicone seals of high-temperature rotary disc heat exchanger |
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| CA2637489C (en) * | 2007-07-10 | 2015-06-16 | Babcock & Wilcox Power Generation Group, Inc. | Tri-sector regenerative oxidant preheater for oxy-fired pulverized coal combustion |
| CN102200402B (en) * | 2011-07-09 | 2013-09-11 | 程爱平 | Low-leakage rotary gas-gas heater |
| CN102200408B (en) * | 2011-07-09 | 2012-11-07 | 程爱平 | Isolating air curtain structure of leak-free sealing system of rotary gas-gas heater |
| EP2589914A1 (en) * | 2011-11-02 | 2013-05-08 | Alstom Technology Ltd | Rotary regenerative heat exchanger |
| US20140128484A1 (en) * | 2012-11-06 | 2014-05-08 | H R D Corporation | Converting natural gas to organic compounds |
| EP2743624A1 (en) * | 2012-12-14 | 2014-06-18 | Alstom Technology Ltd | Leakage reduction system in power plant operations |
| US9841242B2 (en) | 2013-06-21 | 2017-12-12 | General Electric Technology Gmbh | Method of air preheating for combustion power plant and systems comprising the same |
| CN104279577B (en) * | 2014-10-28 | 2016-08-24 | 中国电力工程顾问集团中南电力设计院有限公司 | Modified trisector air heater |
| CN104595545B (en) * | 2015-01-07 | 2017-12-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of single-shaft-rotation heat exchange valve arrangement that can control flow |
| US11014040B2 (en) | 2016-03-31 | 2021-05-25 | Svante Inc. | Adsorptive gas separator |
| ES2839409T3 (en) | 2017-03-10 | 2021-07-05 | Alfa Laval Corp Ab | Plate, plate and heat exchanger device package |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2716636C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Method of compensation of deformation of high-temperature rotary disc heat exchanger |
| RU2716638C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Method of preventing deformation of high-temperature rotary disc heat exchanger |
| RU2716639C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | High-temperature rotary disc heat exchanger |
| RU2716640C1 (en) * | 2019-07-05 | 2020-03-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Silicone seals of high-temperature rotary disc heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101080606A (en) | 2007-11-28 |
| GB2424471A (en) | 2006-09-27 |
| WO2006120371A1 (en) | 2006-11-16 |
| GB0505869D0 (en) | 2005-04-27 |
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