CN1975314A - Regenerative heat exchanger and method for controlling clearance between the surface of the rotor and seal - Google Patents
Regenerative heat exchanger and method for controlling clearance between the surface of the rotor and seal Download PDFInfo
- Publication number
- CN1975314A CN1975314A CNA200610142517XA CN200610142517A CN1975314A CN 1975314 A CN1975314 A CN 1975314A CN A200610142517X A CNA200610142517X A CN A200610142517XA CN 200610142517 A CN200610142517 A CN 200610142517A CN 1975314 A CN1975314 A CN 1975314A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- measurement device
- seal
- regenerative heat
- heating surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/006—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for regenerative heat-exchange apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a regenerative heat exchanger used in heat exchange of gaseous medium, which comprises a seal mean for sealing the heating surface carrier of the heat exchanger, and a measure device for controlling clearance between the seal mean and the heating surface carrier. In order to prolong the life of the measure device and control the seal clearance in a reliable, simple, low cost, high efficient way, the measure device is designed as a pneumatic measure device and a distance bridged by interval elements is arranged between the measure device and heat surface carrier, the length of the distance is at least sufficient for positioning the measure device out of a temperature range, wherein the temperature range is critical for the measure device in no additional cooling device. Further, the invention relates to a regulation device for the sealing member of the regenerative heat exchanger and a measure device for controlling clearance between the sealing member of the regenerative heat exchanger and the heating surface carrier.
Description
Technical field
The present invention relates to a kind of regenerative heat exchanger that is used for the gaseous medium heat exchange as claim 1 preamble, a kind of seal conditioning equipment that is used for regenerative heat exchanger, and a kind of measurement device that is used to monitor the seal clearance between the area of heating surface carrier of seal and regenerative heat exchanger as claim 11 preamble as claim 10 preamble.And, the invention still further relates to a kind of method as the seal clearance width between the area of heating surface carrier that is used for definite seal and regenerative heat exchanger of claim preamble 12, and a kind of method as the seal clearance wide variety between the area of heating surface carrier that is used for definite seal and regenerative heat exchanger of claim preamble 14.
Background technology
Known such regenerative heat exchanger both had been used for air preheat (Luvos) and also had been used for gas gas preheating (Gavos).Wherein the gaseous medium of heat release is by the area of heating surface carrier guiding of regenerative heat exchanger.Be provided with the area of heating surface or storage heater in described area of heating surface carrier, they are heated by the heat release gaseous medium of heat.These heated areas of heating surface are discharged into heat one or more heat absorption gaseous mediums that flow through described area of heating surface carrier equally again then.Described area of heating surface carrier can be designed as static (as stator) or also can be designed as around the longitudinal axis and rotates (as rotor).
If described area of heating surface carrier design is a rotor, air-flow then cold and heat is arranged on the epitrochanterian area of heating surface to carry out the heat exchange between air-flow through described in turn.If described area of heating surface carrier design is a stator, then described heat exchange connects by the rotation air flue is set in described stator front side---so-called rotary cover (rotating hoods) makes air-flow be undertaken by rotor in turn.
In the general regenerative heat exchanger one or more dissimilar seals (for example radial seal, axial seal, circumferential seal or the like) being set is used for mutual separate gas stream and prevents that gas from leaking from described area of heating surface carrier.These seals are made of metal usually, particularly cast iron.Yet, also some seal by other material for example pottery make.
Because the high temperature of heat release gaseous medium, area of heating surface carrier deforms at run duration, particularly the zone of heat release gaseous state MEDIA FLOW warp.Because the distortion of area of heating surface carrier, the seal clearance between seal and the area of heating surface carrier can increase, and leaks probability thereby increase greatly.In order to alleviate this problem, known can be adjustable with seal designs, thereby pushes it against the area of heating surface carrier of distortion.
Adjusting automation about the regenerative heat exchanger sealing system, also knownly regenerative heat exchanger can be designed to be with measurement device, it is determined the distance (seal clearance width) of the deformation extent of area of heating surface carrier or seal and area of heating surface carrier and these data is sent to control appliance, starts actuator and regulate seal according to the data of being transmitted.
DE 4,013 484 C2 have disclosed a kind of example of regenerative heat exchanger, wherein there is a noncontact inductor to be used to measure distance between the front surface of sealing strip and area of heating surface carrier, be arranged on the front surface relative, be used for regulating automatically the sealing strip system with the sealing strip system.This inductor can be a Magnetic Sensor for example, thereby the distance between sealing strip and the area of heating surface carrier is inferred in the variation of measuring magnetic resistance.The example of the mode of definite seal clearance width that other is known is mounted on the area of heating surface carrier and strides the sensing thick stick of sealing surfaces.
The common trait of the measurement device that all are known is that their sensor, inductor or sensor device is all because expose at high temperature near seal or area of heating surface carrier.This usually causes the damage of measurement device and makes shorten relatively service life.And measurement device can be by the contaminants of part existence in the gaseous medium.On the other hand, the more resistant to elevated temperatures measurement device of design also is very hard.For example for Magnetic Sensor, this realizes by adopting cooling system.But it is very expensive and hard that the therefore manufacturing of measurement device, installation and maintenance all become.For the purpose of safeguarding, measurement device also must be able to get at from the outside, therefore must design extra opening again on regenerative heat exchanger, so that the attendant is near described sensor, sensor device or inductor.
Summary of the invention
Therefore the objective of the invention is such equipment and method, can monitor seal clearance between seal and the area of heating surface carrier reliably by them, can be easily and make described equipment economically or carry out described method and described equipment and method in the measurement device that uses have long service life.
Above-mentioned purpose is to realize by the feature in the independent claims.The preferred embodiments of the present invention and further the improvement are put down in writing in the dependent claims.
Described purpose is to utilize a kind of like this regenerative heat exchanger that is used for the gaseous medium heat exchange to realize, described regenerative heat exchanger comprises the seal of the area of heating surface carrier that is used to seal heat exchanger, and comprising the measurement device that is used to monitor the seal clearance between seal and the area of heating surface carrier, described measurement device is designed to pneumatic gauging equipment.And between measurement device and area of heating surface carrier, be provided with distance by the spacer element bridge joint, the length of this distance makes measurement device be positioned at outside the temperature range at least, do not having extra being used to reduce under the situation of equipment of temperature, this temperature range is critical to the function of measurement device.Therefore described measurement device operates in the scope, can not cause tangible measure error because of near the temperature the area of heating surface carrier.Therefore, the existing sensor that need not prevent the high temperature measure especially just can be used for described pneumatic gauging equipment.
The statement of " seal clearance between monitoring seal and the area of heating surface carrier " means the distance between seal and the area of heating surface carrier within the scope of the invention, and promptly the seal clearance width is monitored with the interval of rule at the measured equipment of run duration.For this reason, at first can periodically determine the absolute value of seal clearance width, and change or be offset under the situation of predetermined value, can correspondingly regulate described seal in this value.Secondly, can also only determine the variation of seal clearance width and do not measure or the absolute value of definite seal clearance width.Therefore can make the seal clearance width keep constant as far as possible or continue to be in the predetermined seal clearance width range according to the described seal of the deformation adjustment of area of heating surface carrier.Distance between described seal and the area of heating surface carrier is the distance between the seal inboard and the area of heating surface outside, and the described outside is inboard relative with seal.
Therefore advantage of the present invention be measurement device be provided with to such an extent that also have sealing strip to keep a segment distance with area of heating surface carrier and be not exposed to high temperature or the gas of heat in.Significantly increase the service life of measurement device thus, and can not need be used to hard and expensive Special Equipment that measurement device can be used under the environment of heat such as cooling device etc.Measurement device is in outside the air-flow, so the pollutant in the air-flow also can't cause harmful effect to measurement device.And the present invention can utilize the equipment of simple economy to determine the variation of seal clearance width or seal clearance width reliably.And, because measurement device is provided with to such an extent that have a segment distance also to make the Operation and Maintenance personnel easier to be approaching with seal.Therefore,, just needn't go to guarantee mode specially, also make the simple in structure of whole regenerative heat exchanger near measurement device when design during regenerative heat exchanger.
Measurement device can be placed in outside the critical temperature range that is in its function Anywhere basically.Measure portion is preferably designed for measurement device and is in form outside the heat exchanger.This has guaranteed that measurement device only is exposed in the relatively low temperature.Simultaneously, this mode also makes the Operation and Maintenance personnel especially easily near measurement device.
Distance between the length of measure portion or measurement device and the area of heating surface carrier can pre-determine basically randomly.Measurement device preferably with area of heating surface carrier at a distance of 50 centimetres to 150 centimetres, especially preferably 80 centimetres to 100 centimetres.By on-the-spot test, the applicant finds that above-mentioned distance can obtain best effect in regenerative heat exchanger commonly used.
Measurement device preferably includes fluid supply appts and fluid pressure sensor and/or volume flow sensor.Therefore fluid such as air can supply in the seal clearance, and corresponding air pressure itself is adjusted as the function of existing seal clearance width.Air pressure is low under the situation of big gap width, and under the situation of little air gap width the air pressure height.Basically also can use volume flow sensor.Principle is under the situation of big air gap width, can transmit the large volume flow by the air gap, and vice versa.Further advantageously, air supplies in the seal clearance, so that prevent that dust deposit is on pressure sensor or volume sensor.Therefore, compare with the equipment that prior art is known, this can reduce service intervals significantly.
Distance between measurement device and the area of heating surface carrier is by fluid sealed spacer element bridge joint, and this fluid sealed spacer element is pipeline or pipe particularly, can use any linearity or crooked spacer element in principle.Thus, advantageously an end of spacer element is attached fixedly to seal, and the other end of spacer element is attached fixedly to measurement device.This guarantees that measured value can be owing to the air of revealing and not discovering is discharged and distortion.
Measurement device can design as follows: in order to monitor seal clearance, determine the absolute value of seal clearance width, wherein measurement device uses at least one measured value to carry out measured value and is stored in comparison between the value in the calibration chart.Can be by being arranged in the measurement device or its outside evaluation unit carries out the comparison of absolute measured value.
And measurement device can design as follows: in order to monitor seal clearance, determine the change of seal clearance width.In the case, with periodic interval record measured value and relatively mutual, wherein for example because the error in definite absolute measured value process that skew (offset) causes has lower influence.
According to the present invention, this purpose realizes by regenerative heat exchanger that further this regenerative heat exchanger comprises and is used to adjust the actuator of seal and comprises the control appliance that is used to control actuator, is connected with measurement device and is used for to control appliance transmission data.Control appliance utilizes actuator to adjust seal as the function of the data of being transmitted by measurement device.Here importantly predetermined seal clearance width range; If the measured value of being determined by measurement device exceeds this predetermined seal clearance width range, then adjust seal by actuator.
According to the present invention, this purpose further realizes by the used adjustment equipment of seal that is used for the regenerative heat exchanger of gaseous medium heat exchange as claimed in claim 10, this adjustment equipment comprises the actuator that is used to adjust seal, be used to control the control appliance of actuator, and be used for the seal of monitoring heat exchanger and the measurement device of the seal clearance between the area of heating surface carrier.Adjustment equipment can use according to measurement device of the present invention, and this measurement device is determined the absolute value and the relative value of seal clearance width, and relative value is represented the change of seal clearance width.
In addition, according to the present invention, this purpose is by realizing as claim 13 and 15 described methods.
And, according to the present invention, this purpose realizes by the regenerative heat exchanger that is used for the gaseous medium heat exchange, described regenerative heat exchanger comprises the seal of the area of heating surface carrier that is used to seal heat exchanger, and comprise the measurement device that is used to monitor the seal clearance between seal and the area of heating surface carrier, measurement device is designed for electronic range measurement and comprises emitting/receiving.And, between emitting/receiving and area of heating surface carrier, be provided with measure portion, this measure portion at least long enough so that measurement device is positioned at regard to its function is outside the critical temperature range.
Therefore the invention reside in by electronic range measurement and monitor gap between seal and the area of heating surface carrier.Term " electronic range measurement " has implied the meaning of utilizing the signal transmission to determine distance.Being used for a kind of possibility of electronic range measurement for example is the traveling time of measuring-signal.The measurement device of measuring traveling time comprises transmitter, receiver (if necessary, having amplifier) and timer (interval counter) at least.Transmitter and receiver are typically designed to an integral body.Traveling time is the path between signal current process transmitter and the target object and turns back to required such time cycle of emitting/receiving again.Utilize measured traveling time, gait of march that can binding signal is calculated the path of being passed through, and is halved to determine the distance between emitting/receiving and the target object in this path then.Being used for the another kind of possibility of electronic range measurement is interferometry or phase measurement.Here, the phase place between signal that relatively sends and the signal that returns, and determine length or linear the change thus.In principle, such as triangulation be used for utilize signal to carry out the every other known method of electronic range measurement all applicable to the present invention.
In principle, the ripple signal that can use any kind is as signal, for example light wave, sound wave, matter wave or even such as the ripple of advancing in fluid of ripples.But, in fact, use electromagnetic wave or sound wave to carry out electronic range measurement usually.
Emitting/receiving preferably designs as a whole, and it can send the signal that signal and reception are returned.But, in principle, also can be design with two absolute construction unit.Emitting/receiving is arranged on an end of measure portion, and area of heating surface carrier is arranged on the other end.The signal that is sent by emitting/receiving is along the current area of heating surface carrier that arrives of measure portion, by latter's reflection and current and turn back to emitting/receiving along measure portion.Basically, can pre-determine any length as measure portion, but must guarantee this length at least long enough so that emitting/receiving and therefore measurement device be positioned at such zone, be not critical-temperature for the function of measurement device in the temperature in this zone.Employed corresponding measurement device is depended in critical-temperature, thereby must determine measure portion at should be used under the various situations.Best, pre-determine measure portion as follows: the environment temperature of emitting/receiving is roughly corresponding to room temperature.Usually, be in the function that 50 ° to the 70 ° environment temperatures in the scope are enough to guarantee be used for the common survey equipment of electronic range measurement.But, also can use than the equipment of working uninterruptedly under the high ambient temperature.Basically, measure portion can have any step (progression).But measure portion is substantial linear preferably.If this is impossible, for example owing to constructional reason, can differently designs measure portion at an easy rate so, and under help, the ripple signal be turned to, thereby the ripple signal is advanced along the step of measure portion such as the suitable equipment of reflecting surface.
The ripple signal that is sent by emitting/receiving is electromagnetic wave preferably, particularly is in the electromagnetic wave of 105Hz in the 1014Hz frequency range.Can particularly preferably use laser beam, infrared beam or beam of white light as the ripple signal.And the test that the applicant carried out proves that these light beams are particularly suitable for the electronic range measurement in the regenerative heat exchanger.And the emitting/receiving unit that produces or receive these light beams provides as standard block on market and therefore comparatively cost is effective.
Avoid ectocine in order to protect the ripple signal---this ectocine can make the measurement result distortion, and advantageously measure portion places in the pipeline.Thus, must broadly understand term " pipeline ", and it also comprises any channel-style structure and analog, utilize this structure can encapsulate measure portion.Pipeline advantageously encapsulates measure portion at least in the zone from the emitting/receiving to the seal.
In a preferred embodiment of the invention, the mode with the change of determining the distance between seal and the area of heating surface carrier designs measurement device.For example, this can realize by the distance of measuring at regular intervals between emitting/receiving and the area of heating surface carrier.By comparing each determined result, then can determine the change in time of seal clearance width.Comparing and measuring the required evaluation unit of value can be designed as and be integrated in the measurement device or as the absolute construction unit, it receives the measurement data by the measurement device transmission.Alternatively, can be according to determining that the mode of seal to the absolute value of the distance of area of heating surface carrier designs measurement device.For example this can by the distance between the emitting/receiving of measuring area of heating surface carrier and measurement device and by will this distance and emitting/receiving and seal (seal inboard) between constant distance compare and realize.Can correspondingly adjust seal then as the function of determined seal clearance width.
In a further advantageous embodiment, measurement device is designed to interferometer.Alternatively, measurement device is designed for definite traveling time.Its advantage be can be especially easily and cost produce measurement device effectively be standard block and so comparatively cost is effective because measure the required construction unit (single transmitter, receiver and timer) of traveling time.
If in order to monitor seal clearance, measurement device is designed to determine the absolute value of seal clearance width, and emitting/receiving is advantageously provided in the constant distance of distance seal.May be embodied as during the whole operation thereby when regulating seal apart from keeping constant.For example, this can be adjustable by emitting/receiving is designed to, and according to the adjusting of seal and similarly regulate the latter during operation and realize.Another possibility be by a support member or supporting member with the emitting/receiving seal that is permanently connected, thereby when regulating seal, also regulate emitting/receiving, thereby distance keeps constant.Must guarantee between seal and emitting/receiving, to keep consistently enough distances in doing so.Distance from emitting/receiving to the seal inboard advantageously for constant distance to determine.Particularly preferably, use a pipeline for this purpose, measure portion is extended the attached regularly seal of an end of this pipeline, the attached regularly emitting/receiving of the other end in the inboard of this pipeline.This pipe can embed in the seal or settle thereon.An opening is advantageously provided on the seal in this zone, thus in this zone pipeline against seal from emitting/receiving to the not sealed obstruction of the measure portion of area of heating surface carrier.In addition, an evaluation unit can be set in this embodiment, this evaluation unit is compared the measuring distance between emitting/receiving and the area of heating surface carrier with the constant distance between emitting/receiving and the seal, and thereby definite seal clearance width.Evaluation unit can be designed to the measurement mechanism one or as a separated structural units.
In another preferred embodiment of the present invention, regenerative heat exchanger is provided with the control appliance that is used to regulate the actuator of seal and is used to control actuator.Measurement device is designed for to control appliance transmission data.In addition, regulate seal by actuator according to the data of transmitting by measurement device.By designing in measurement device, carrying out the data evaluation of measuring by measurement device in the control appliance or as the evaluation unit of the unit of an independent structure.In addition, the seal clearance width range is limited in advance and is stored in the control appliance.If the seal clearance width of determining is positioned at outside this seal clearance width range, the seal clearance width is taken within the predetermined seal clearance width range once more thereby control appliance is designed to control actuator.The seal clearance width range can be scheduled to randomly.It preferably is in 0.5mm in the scope of 2mm, particularly preferably arrives 1mm for 0.5mm.This actuator can comprise electric drive, pneumatic actuation or hydraulic-driven.
The conditioning equipment of the seal by being used for regenerative heat exchanger is realized further according to purpose of the present invention, comprises actuator, control appliance and measurement device according to the described conditioning equipment of claim 29.Conditioning equipment can together use with the measurement device that is used as the absolute value of determining the seal clearance width and as the measurement device of determining the seal clearance wide variety.Measurement device arrives control appliance with interval predetermined, rule with transfer of data.
In addition, be used to monitor seal clearance between the area of heating surface carrier of seal and regenerative heat exchanger by measurement, realize according to purpose of the present invention according to claim 30.
In addition, realize according to purpose of the present invention by method according to claim 31 and claim 33.
Description of drawings
Explain the present invention referring to accompanying drawing, accompanying drawing diagrammatically illustrates:
Fig. 1 is the phantom that is provided with the regenerative heat exchanger of the conditioning equipment that comprises first measurement device;
Fig. 2 is a chart of explaining the relevance between seal clearance width, fluid pressure and volume flow;
Fig. 3 is the phantom that is provided with the regenerative heat exchanger of the conditioning equipment that comprises second measurement device;
Fig. 4 is the flow chart that the method for the seal of regulating regenerative heat exchanger is described; With
Fig. 5 is the flow chart that another method of the seal of regulating regenerative heat exchanger is described.
The specific embodiment
Fig. 1 illustrates the cutaway view of a part of regenerative heat exchanger.Regenerative heat exchanger comprises area of heating surface carrier 11, and it is designed to a rotor in this example.A seal 10 is set on the outside of heated sealant carrier 11, and seal 10 is parallel to this outside haply and extends.Between seal 10 and area of heating surface carrier 11, seal clearance 13 is set.Seal clearance 13 is (not shown at this) constant on whole length and height.Seal 10 is made up of two metal levels that are mutually permanently connected.
A local opening 21 is arranged in the seal 10, and this opening roughly is orthogonal to sealing plane and passes the sealing part and extend.Spacer element 17, pipeline for example, its front side is positioned in the zone of the opening 21 of the sidepiece of seal 10 and flushes with seal 10, and the sidepiece of described seal 10 is away from (turn away) area of heating surface carrier 11.Described spacer element is fixedlyed connected with sealing part 10 by welding.Pipeline 17 is provided with in the mode that flushes with opening 21.Pipeline 17 is designed to linearly, generally perpendicularly be positioned on the seal 10.In its further situation, pipeline passes the opening 22 of another design on the wall of regenerative heat exchanger 15.The distance that this span seal 10 is certain, and setting roughly in parallel.The diameter of opening 22 is than the slightly larger in diameter of pipeline 17, thereby causes in the zone of opening 22 annular gap around pipeline 17.As a result, pipeline 17 passes shell 15 and moves along its longitudinal direction.Seal 23 is against the shell 15 of opening 22 away from a side of seal 10.Seal 23 is similarly against pipeline 17, thereby the annular gap around pipeline 17 in the zone of opening 22 seals toward the outer side.Seal is by the supporting members support that is attached on the housing 15 (not shown at this).
Measurement device 27 is arranged on the place, another end of pipeline, apart from area of heating surface carrier 11 certain distances 14 places, this end is away from seal 10.Measurement device 27 comprises pressure sensor 25 and fluid supplying apparatus 26, for example air blast.Fluid supplying apparatus 26 is used for to pipeline 17 accommodating fluids, for example air or other gas.Institute's air supplied is advanced into seal clearance 13 along pipeline 17 then, and institute's air supplied depends on that the size of seal clearance 13 can leak corresponding amount.If seal clearance 13 is less relatively, only have a spot of air from the gap 13 and pipeline 17 leak.In the case, under static state, the air pressure in the pipeline 17 is constant, by the baroceptor 25 detection air pressure at enough distances 14 places between measurement device 27 and area of heating surface carrier 11.If seal clearance is relatively large, thereby the volume flow that discharging is bigger from seal clearance 13 only is less relatively air pressure in pipe 17.
The advantage of this pneumatic gauging equipment is: because it measures in esse gap 13 in all cases, and be not subjected to for example influence of the wearing and tearing of seal 10 of reference substance.In addition, because the distortion that the consumption of temperature fluctuation, material breaks or the parts that move relative to each other produces causes the change of seal clearance 13, thereby detect this change reliably.In addition, if use fluid supplying apparatus 26, the dust deposit on pressure sensor 25 keeps lower by the fluid supply of high reliability.Naturally, also may use the fluid suction device to replace fluid supplying apparatus 26.Air is not extruded outside the seal clearance 13 then, but, similarly between the fluid pressure of seal clearance 13 and pipeline 17, have correlation in the air suction seal gap 13.
Fig. 2 has diagrammatically illustrated correlation between seal clearance width 13, fluid pressure and the fluid volume stream based on measured value, and fluid supplying apparatus 26 is used for determining measured value.At seal clearance width s is under the situation of for example little seal clearance 13 of s=0.5mm, has the higher relatively about p=87 millibar of fluid pressure (mbar), thereby the about V=0.5m of relative smaller volume stream is only arranged
3/ h transmits outwardly by pipeline 17 and seal clearance 13, sees an A.At big seal clearance width s is under the situation of for example big seal clearance 13 of s=3.8mm, only reaches the less relatively about p=5mbar of air pressure, volume flow V=5m
3/ h is transported to outside the seal clearance 13.The mode of numerical value by example is given, and depends on the size of workpiece, and they can depart from above-mentioned value several times for the heat exchanger of different size.
If measured value is determined that by pressure sensor 25 (see above) allows to draw the direct conclusion about the seal clearance width that exists, this measured value can be used to change the seal clearance width then.For this purpose, measured value is offered control appliance 9, wherein itself and the value that still is among the predetermined seal clearance width range or be in outside the predetermined seal clearance width range are compared.Be in outside the seal clearance width range if this measured value is categorized as, then signal sent to actuator 20, actuator 20 is regulated the position of seal 10 by actuator arm 201.If measure the seal clearance width once more during this adjustment movement, thereby seal clearance 13 is set to a value that is within the seal clearance width range.Therefore can calibrate the width of seal clearance.
Can also realize the measurement of seal clearance apart from certain safe distance with another measurement device.Fig. 3 has illustrated one roughly corresponding to the structure of structure shown in Figure 1.But difference is that the measurement device 12 that is used for electronic range measurement is set to replace pneumatic gauging equipment 27.Measurement device 12 comprises the emitting/receiving 121 that can launch or receive electromagnetic wave 16 (being infrared beam in this example).Infrared beam in pipeline 17 roughly the longitudinal direction at pipe advance, finally pass opening 21 and contact area of heating surface carrier 11 up to it.Infrared beam 16 is reflected then.Folded light beam turns back to emitting/receiving 121 with roughly the same path 11.The path that is covered by the infrared beam between emitting/receiving 121 and the area of heating surface carrier 11 16 is distance or measure portion 14.Though measure portion 14 can be is naturally extended in pipeline 17, for reason clearly in this example measure portion 14 be shown outside pipeline 17.In the embodiment of this explanation, because putting all can not reach at any time, the environment temperature of measurement device 12 for the function of measurement device 12, is critical level, thereby measurement device 12 is arranged on apart from the certain distance of seal clearance 13, even outside the shell 15.
The value of determined seal clearance width is sent to control appliance 19 by measurement device 12.The actual value that stores predetermined seal clearance width range in the control appliance 19 and monitor determined seal clearance width at once is positioned within this predetermined gap width scope still outside it.In case actual value is positioned at outside the preset range, control appliance is by control impuls actuated actuators 20, and thus, this actuator begins action and regulates seal 10.The conditioning equipment of actuator 20 illustrates with double-head arrow in the accompanying drawings.Thus, can with seal 10 towards or regulate away from area of heating surface carrier 11.Attaching is in housing 15 and comprise movable actuator arm 201 regularly for actuator 20, and this movable actuator arm 201 can move along regulating direction.The adjustable range of seal 10 preestablishes by control appliance 19.Control appliance 19 calculates the adjusting path as the function of the deviation of determined seal clearance width and predetermined seal clearance width range.
Fig. 4 illustrates flow chart, and the step of the method for the seal of regulating regenerative heat exchanger wherein has been described.In first step, measurement device sends infrared signal.Timer starts at synchronization.Infrared signal is advanced and is turned back to measurement device by the reflection of the area of heating surface carrier of regenerative heat exchanger and be received at this place along measure portion.In case the infrared signal that is reflected is received, timer stops.Based on the measured time, can determine the distance that infrared signal covers by the traveling time of determining signal now.At this,, need guarantee the whole path that covers is divided into half owing to only must determine signal path.In next step, the absolute value of the width of the seal clearance between seal and the area of heating surface carrier calculates by the predetermined constant distance value that deducts from determined distance from the medial surface of seal to the distance of measurement device.In following step, whether evaluation unit is monitored determined seal clearance width value and is in the predetermined scope.If be in the predetermined scope, the adjusting of seal does not take place and begin the sequence of operation of performed step at this.That is, send new infrared signal.On the other hand, determined seal clearance width value is in outside the preset range, then determines the definite deviation of relative preset range in next step.Same establish determined value and be on the preset range or under it, because this will influence the adjusting direction of seal.If this value is on the preset range, then seal is regulated towards area of heating surface carrier, that is, and towards the guiding of area of heating surface carrier, and if this value is under the preset range, then with the seal guiding away from area of heating surface carrier.After determining this deviation, seal is regulated this departure.Also seal can be regulated one be slightly larger than the amount of definite deviation.For example, this adjusting is carried out as follows,, seal is regulated such amount that is, and this amount adds half corresponding amount with the end points difference of preset range for deviation.This has guaranteed that the value of seal clearance width after adjusting is positioned at the center of preset range substantially.After adjusting, begin described sequence of steps at this, and then send infrared signal once more.Shown in the method, described sequence is a sequence of steps, it repeats in the operating process of regenerative heat exchanger continuously.When turning on and off regenerative heat exchanger, begin and finish this sequence of steps respectively.
Fig. 5 illustrates flow chart, and it has illustrated the other method of regulating the seal of regenerative heat exchanger.In the method, same, in initial first step, send infrared signal and receive the infrared signal that is reflected, determine to be the time that this spent by timer.In following step, the method shown in Fig. 4 that is similar to is determined the signal that sends or the distance D that signal covered of reflection
iIn following step, store determined distance D
iValue.After this, whether exist in the monitoring memory and early to be worth D
I-1This is worth D
I-1Be based on and formerly measure determined distance value.If in memory, do not have measured value early to obtain, then begin this program once more and send new infrared signal.Otherwise, in next step, fiducial value D
iAnd D
I-1These two values are not identical thus if there is deviation between two values, then begin the sequence of operation of step equally once more.At this, also can stipulate, to begin once more under the situation that is not more than scheduled volume in deviation to monitoring programme.If exist deviation or deviation greater than scheduled volume, then in next step, seal regulated departure.Subsequently, the value D that is stored in the memory
1In next step by overwrite or deletion and begin this program once more from memory.
Claims (34)
1. the regenerative heat exchanger that is used for the heat exchange of gaseous medium, described regenerative heat exchanger comprises the seal (10) of the area of heating surface carrier (11) that is used to seal heat exchanger, and comprise the measurement device (27) that is used to monitor the seal clearance (13) between seal (10) and the area of heating surface carrier (11)
Described regenerative heat exchanger is characterised in that,
Described measurement device (27) is designed to pneumatic gauging equipment, between measurement device (27) and area of heating surface carrier (11), be provided with distance (14) by spacer element (17) bridge joint, the length of this distance makes measurement device (27) be positioned at outside the temperature range at least, do not having extra being used to reduce under the situation of equipment of temperature, this temperature range is critical to the function of measurement device (27).
2. regenerative heat exchanger as claimed in claim 1 comprises heat exchanger shell (15), it is characterized in that,
Described measurement device (27) is arranged in the outside of described heat exchanger shell (15).
3. regenerative heat exchanger as claimed in claim 1 or 2 is characterized in that,
Described measurement device (27) is arranged in the distance of (11) 50 centimetres to 150 centimetres in the described area of heating surface carrier of distance, is arranged in 80 centimetres to 100 centimetres distance especially.
4. as each described regenerative heat exchanger in the above-mentioned claim, it is characterized in that,
Described measurement device comprises fluid supplying apparatus (26) and fluid pressure sensor (25) and/or volume flow sensor.
5. as each described regenerative heat exchanger in the above-mentioned claim, it is characterized in that,
Described distance (14) by the spacer element (17) of liquid sealing, specifically be pipeline or pipe bridge joint.
6. regenerative heat exchanger as claimed in claim 5 is characterized in that,
One end of described spacer element (17) is attached to described seal (10) regularly, and the other end of described spacer element (17) is attached to described measurement device (27) regularly.
7. as each described regenerative heat exchanger in the above-mentioned claim, it is characterized in that,
In order to monitor described seal clearance (13), described measurement device (27) is designed to determine the variation of described seal clearance width.
8. as each described regenerative heat exchanger in the claim 1 to 6, it is characterized in that,
In order to monitor described seal clearance (13), described measurement device (27) is designed to by using at least one measured value to carry out measured value and being stored in the absolute value that described seal clearance width is determined in comparison between the value in the calibration chart.
9. regenerative heat exchanger as claimed in claim 8, comprise the actuator (20) that is used to regulate described seal (10) and comprise the control appliance (19) that is used to control described actuator (20), described measurement device (27) is coupled to described control appliance (19) and is used for the data transmission, and described control appliance (19) is regulated described seal (10) by actuator (20) according to the data that measurement device (27) is transmitted
Described regenerative heat exchanger is characterised in that,
The seal clearance width range preestablishes, and control appliance (19) is designed to regulate seal (10) by actuator (20) under the determined seal clearance width of described measurement device (27) is positioned at situation outside the described predetermined seal clearance width range.
10. the conditioning equipment of the seal (10) of the regenerative heat exchanger that is used to the heat exchange of gaseous medium and designs, described conditioning equipment comprises the actuator (20) that is used to regulate seal (10), be used to control the control appliance (19) of actuator (20) and be used to monitor the seal (10) of heat exchanger and the measurement device of the seal clearance (13) between the area of heating surface carrier (11), described measurement device (27) is designed for data is sent to control appliance (19), described control appliance (19) is regulated seal (10) by actuator (20) according to the data that measurement device (12) is transmitted
Described conditioning equipment is characterised in that,
Described measurement device (27) is designed to pneumatic gauging equipment, between measurement device (27) and area of heating surface carrier (11), be provided with distance (14) by spacer element (17) bridge joint, this distance to the youthful and the elderly for making measurement device (27) be positioned at outside the temperature range, do not having extra being used to reduce under the situation of equipment of temperature, this temperature range is critical to the function of measurement device (27).
11. be used to monitor the seal (10) of the regenerative heat exchanger that the heat exchange for gaseous medium designs and the measurement device of the seal clearance (13) between the area of heating surface carrier (11),
Described measurement device is characterised in that,
Described measurement device (27) is designed to pneumatic gauging equipment, between measurement device (27) and area of heating surface carrier (11), be provided with distance (14) by spacer element (17) bridge joint, this distance to the youthful and the elderly for making measurement device (27) be positioned at outside the temperature range, do not having extra being used to reduce under the situation of equipment of temperature, this temperature range is critical to the function of measurement device (27).
12. be used for determining the area of heating surface carrier (11) of regenerative heat exchanger and the method for the seal clearance width between the seal (10), this regenerative heat exchanger is used for the heat exchange of gaseous medium, described method is characterised in that and comprises the steps:
By means of spacer element (17) distance (14) is set between measurement device (27) and area of heating surface carrier (11);
In described spacer element, supply with the fluid volume flow by means of air blast (26) especially;
Measure and the relevant fluid pressure measured value of this fluid volume stream by means of pressure sensor (25), or by means of volume flow sensor measurement volumes flow measurements; By being compared with the value in being stored in calibration chart, measured value calculates the sealing gap.
13. by means of the method that conditioning equipment is regulated the seal (10) of regenerative heat exchanger, this regenerative heat exchanger is used for the heat exchange of gaseous medium, this conditioning equipment comprises:
Actuator (20);
Control appliance (10);
Measurement device (27);
Described method is characterised in that and comprises the steps:
Determine the width of seal clearance according to the method for claim 12;
Whether this determined value is positioned at outside this predetermined seal clearance width range, as necessary in monitoring
By measurement device (27) signal (16) is sent to control appliance (19); And
Start actuator (20) and regulate sealing part (10).
14. be used for determining the method for the change of the seal (10) of regenerative heat exchanger and the seal clearance width between the area of heating surface carrier (11), this regenerative heat exchanger is used for the heat exchange of gaseous medium, described method is characterised in that and comprises the steps:
By means of spacer element (17) distance (14) is set between measurement device (27) and area of heating surface carrier (11);
In described spacer element, supply with the fluid volume flow by means of air blast (26) especially;
Measure and the relevant fluid pressure measured value of this fluid volume stream by means of pressure sensor (25), or by means of volume flow sensor measurement volumes flow measurements;
Repeat this measurement at interval with preset time;
By with this measured value with each last time measured value compare and calculate the change of sealing gap width.
15. by means of the method that conditioning equipment is regulated the seal (10) of regenerative heat exchanger, described conditioning equipment comprises:
Actuator (20);
Control appliance (10); And
Measurement device (27);
Described method is characterised in that and comprises the steps:
Determine the change of seal clearance width according to the method for claim 14;
Should the change value be sent to control appliance (19); And
Start this actuator (20) and regulate sealing part (10) by this change value.
16. be used for the regenerative heat exchanger of gaseous medium heat exchange, described regenerative heat exchanger comprises the seal (10) of the area of heating surface carrier (11) that is used to seal this heat exchanger, and comprise the measurement device that is used to monitor the seal clearance (13) between sealing part (10) and this area of heating surface carrier (11)
Described regenerative heat exchanger is characterised in that, this measurement device (12) is designed for electronic range measurement and comprises emitting/receiving (121), is arranged on the measurement section (14) between this emitting/receiving (121) and this area of heating surface carrier (11), the length of this measurement section is at least and makes this measurement device (12) be positioned at outside the temperature range, and this temperature range is critical to its function.
17. regenerative heat exchanger as claimed in claim 16, it comprises heat exchanger shell (15), it is characterized in that, this measurement device (12) is arranged on the outside of this heat exchanger shell (15).
18., it is characterized in that this measurement device is arranged on apart from (11) 50 centimetres in this area of heating surface carrier to 150 centimeters as claim 16 or 17 described regenerative heat exchangers, particularly 80 centimetres to 100 centimeters.
19., it is characterized in that this emitting/receiving (121) sends ripple signal, particularly electromagnetic wave (16) as each described regenerative heat exchanger in the claim 16 to 18.
20. regenerative heat exchanger as claimed in claim 19 is characterized in that, this ripple signal (16) is laser beam, infrared beam or beam of white light.
21., it is characterized in that this measurement section (14) is extended as each described regenerative heat exchanger in the claim 16 to 20 in pipeline (17).
22., it is characterized in that in order to monitor sealing gap (13), this measurement device (12) is designed to determine the change of sealing gap width as each described regenerative heat exchanger in the claim 16 to 21.
23., it is characterized in that in order to monitor sealing gap (13), this measurement device (12) is designed to determine the absolute value of sealing gap width as each described regenerative heat exchanger in the claim 16 to 20.
24., it is characterized in that this measurement device (12) is designed to an interferometer as each described regenerative heat exchanger in the claim 16 to 23.
25., it is characterized in that this measurement device (12) is designed to monitor sealing gap (13) by the traveling time of determining this ripple signal (16) as each described regenerative heat exchanger in the claim 16 to 23.
26. regenerative heat exchanger as claimed in claim 25 is characterized in that, in order to monitor sealing gap (13), this measurement device (12) is designed to determine the absolute value of sealing gap width; This emitting/receiving is arranged on apart from the constant distance (18) of sealing part (10) and locates; And this measurement device (12) is designed to determine the sealing gap by the constant distance (18) between this emitting/receiving (121) and the sealing part (10) is compared with the measuring distance between this this emitting/receiving (121) and the sealing part (10).
27. regenerative heat exchanger as claimed in claim 26 is characterized in that, this measurement section (14) is in the inner extension of pipe (17); And an end of this pipe (17) is fixedly connected to sealing part (10), and the other end of this pipe (17) is fixedly attached to this emitting/receiving (121).
28. as each described regenerative heat exchanger in the claim 23 to 27, it comprises the actuator (20) that is used to regulate sealing part (10), and comprise the control appliance (19) that is used to control this actuator (20), this measurement device (12) is couple to control appliance (19) and is used for transfer of data, and this control appliance (19) is by means of actuator (20), regulate sealing part (10) according to the data that this measurement device (12) transmits
Described regenerative heat exchanger is characterised in that:
Preestablished a seal clearance width range, control appliance (19) is designed to: if the sealing gap width of being determined by this measurement device (12) is positioned at outside this predetermined seal clearance width range, it regulates sealing part (10) by means of this actuator (20).
29. be used for the conditioning equipment of the seal (10) of regenerative heat exchanger, this regenerative heat exchanger is used for the heat exchange of gaseous medium, described conditioning equipment comprises the actuator (20) that is used to regulate sealing part (10), be used to control the control appliance (19) of actuator (20) and be used to monitor the seal (10) of this heat exchanger and the seal clearance (13) between the area of heating surface carrier (11), this measurement device (12) is designed to data are sent to this control appliance (19), and this control appliance is regulated sealing part (10) according to the data that this measurement device (12) transmits by means of this actuator (20);
Described conditioning equipment is characterised in that,
This measurement device (12) is designed to electronic range measurement, and comprise emitting/receiving (121), between this emitting/receiving (121) and this area of heating surface carrier (11), be provided with measurement section (14), the length of this measurement section is at least and makes this measurement device (12) be positioned at outside the temperature range, and this temperature range is critical for its function.
30. be used to monitor the seal (10) of regenerative heat exchanger and the measurement device of the seal clearance (13) between the area of heating surface carrier (11), this regenerative heat exchanger is used for the heat exchange of gaseous medium,
Described measurement device is characterised in that,
This measurement device (12) is designed to electronic range measurement and comprises: emitting/receiving (11); Be arranged on the measurement section (14) between this emitting/receiving (121) and this area of heating surface carrier (11), the length of this measurement section is at least and makes this measurement device (12) be positioned at outside the temperature range, and this temperature range is critical for its function.
31. be used for determining the seal (10) of regenerative heat exchanger and the method for the seal clearance between the area of heating surface carrier (11), this regenerative heat exchanger is used for the heat exchange of gaseous medium,
Described method is characterised in that the following step:
Between emitting/receiving (121) and area of heating surface carrier (11), a measurement section (14) is set;
Produce and emission electromagnetic wave (16) by means of this emitting/receiving (121);
Keep the preset distance between this emitting/receiving (121) and the sealing part (10) constant;
Measure the length of this measurement section (14) by the traveling time of determining this ripple (16); And
By the predetermined constant distance (18) between this measured value and this emitting/receiving (121) and the sealing part (10) is compared, and calculate the width in sealing gap.
32. be used for regulating by means of conditioning equipment the method for the seal (10) of regenerative heat exchanger, this regenerative heat exchanger is used for the heat exchange of gaseous medium,
Actuator (20);
Control appliance (19);
Measurement device (12),
Described method is characterised in that and comprises the steps:
Determine the width in sealing gap according to the method for claim 31;
Whether this determined value is positioned at outside the predetermined seal clearance width range in monitoring; If necessary,
By this measurement device (12) signal (12) is delivered to control appliance (19); And
Start this actuator (20) and regulate sealing part (10).
33. be used for determining the method for change of the seal clearance width of the seal (10) of regenerative heat exchanger and the seal (10) between the area of heating surface carrier (11), this regenerative heat exchanger is used for the heat exchange of gaseous medium, and described method is characterised in that and comprises the steps:
Between static state emission/reception (121) and this area of heating surface carrier (11), provide measurement section (14);
Produce concurrent radio magnetic wave (16) by means of this emitting/receiving (121);
Measure the length of this measurement section (14) by the traveling time of determining this ripple (16);
Repeat this measurement at interval with preset time; And
By this measured value and measured value that each was last time measured are compared the change of calculating the seal clearance width.
34. by the method that conditioning equipment is regulated the seal (10) of regenerative heat exchanger, this regenerative heat exchanger is used for the heat exchange of gaseous medium, this conditioning equipment comprises:
Actuator (20);
Control appliance (19); With
Measurement device (12),
Described method is characterised in that the following step:
Determine the change in sealing gap according to claim 33;
Should the change value be sent to this control appliance (19); And
Start this actuator (20) and regulate sealing part (10) by this change value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05022817.0 | 2005-10-19 | ||
| EP05022817A EP1777478A1 (en) | 2005-10-19 | 2005-10-19 | Regenerative heat exchanger and method for controlling clearance between the surface of the rotor and seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1975314A true CN1975314A (en) | 2007-06-06 |
Family
ID=36000881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610142517XA Pending CN1975314A (en) | 2005-10-19 | 2006-10-19 | Regenerative heat exchanger and method for controlling clearance between the surface of the rotor and seal |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1777478A1 (en) |
| CN (1) | CN1975314A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2128534T3 (en) * | 2008-05-30 | 2012-02-13 | Amrona Ag | Device for minimizing an undesired fluid flow from a first sector to a second sector as well as a heat transfer system with such a device |
| SI2136148T1 (en) * | 2008-06-18 | 2010-11-30 | Amrona Ag | Device and method for setting the leak rate through the sealing gaps of a rotary heat exchanger |
| PL2258999T3 (en) * | 2009-05-28 | 2017-03-31 | Balcke-Dürr GmbH | Method for temperature-dependant adjustment of a seal gap on a regenerative heat exchanger and related adjustment device |
| US8505923B2 (en) | 2009-08-31 | 2013-08-13 | Sealeze, A Unit of Jason, Inc. | Brush seal with stress and deflection accommodating membrane |
| EP2458315B1 (en) * | 2010-11-25 | 2017-01-04 | Balcke-Dürr GmbH | Regenerative heat exchanger with forced rotor seal |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3232335A (en) * | 1962-03-21 | 1966-02-01 | Svenska Rotor Maskiner Ab | Rotary regenerative preheater |
| US4206803A (en) * | 1978-12-26 | 1980-06-10 | The Air Preheater Company, Inc. | Rotor turndown sensor and control |
| US4306612A (en) * | 1979-11-09 | 1981-12-22 | The Air Preheater Company, Inc. | Fiber optic sensing device |
| JPH0618185A (en) * | 1992-07-01 | 1994-01-25 | Mitsubishi Heavy Ind Ltd | Sector plate push controller for rotary air preheater |
| JPH0942873A (en) * | 1995-08-01 | 1997-02-14 | Abb Kk | Rotary regenerative type heat exchanger |
| SE517212C2 (en) * | 1996-08-15 | 2002-05-07 | Air Preheater Abb | Methods and apparatus for sensing a game |
| SE517213C2 (en) * | 1996-08-15 | 2002-05-07 | Air Preheater Abb | Device for a regenerative, rotary heat exchanger |
| US6227150B1 (en) * | 2000-04-03 | 2001-05-08 | Abb Air Preheater, Inc. | Load based control system for active leakage control in air preheater |
-
2005
- 2005-10-19 EP EP05022817A patent/EP1777478A1/en not_active Withdrawn
-
2006
- 2006-10-19 CN CNA200610142517XA patent/CN1975314A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP1777478A8 (en) | 2007-08-15 |
| EP1777478A1 (en) | 2007-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1975314A (en) | Regenerative heat exchanger and method for controlling clearance between the surface of the rotor and seal | |
| TWI737678B (en) | Rotary union, rotary device, and method for operating a rotary device | |
| JP7368236B2 (en) | Vacuum valve with position sensor | |
| KR102613385B1 (en) | Mechanical seals for sealing fluid conduction channels and/or spaces and methods for monitoring wear of mechanical seals | |
| US20120318197A1 (en) | Spiral coating apparatus and spiral coating method | |
| KR20110068919A (en) | An active viewport detection assembly for substrate detection in a vapor deposition system | |
| WO2012046611A1 (en) | Device for monitoring thickness reduction of inner surface in heat transfer pipe or inner surface in evaporation pipe | |
| JP2008286302A (en) | Rotary joint and abnormality detection mechanism of rotary valve element | |
| CN1423746A (en) | Telescopic sensor assembly | |
| CN115507243B (en) | Online displacement corrugated pipe compensator applied to high-temperature occasion | |
| US11965607B2 (en) | Butterfly valve | |
| JP4188919B2 (en) | Diagnostic equipment for coke oven carbonization chamber | |
| JP2009085177A (en) | Method of detecting blow-by gas in four-stroke multi-cylinder engine | |
| KR20180126799A (en) | Thermal insulation pipe system | |
| US20240159337A1 (en) | Rotary Joint with a Mechanical Seal | |
| JP4220800B2 (en) | Method for identifying the trajectory of internal observation means for inspecting a coke oven carbonization chamber using an inspection apparatus for the coke oven carbonization chamber and an inspection method for the coke oven carbonization chamber | |
| JP2008276910A (en) | Device and method for preventing condensation of lubricant vapor on surface of flow path for lubricant vapor flowing on magnetic disk to form lubricant coating on disk | |
| KR100709928B1 (en) | Diagnostic apparatus and diagnostic method for carbonization chamber of coke oven | |
| US8381604B2 (en) | Intelligent sootblower | |
| JP2006284432A (en) | Maintenance management system | |
| KR20210029994A (en) | Apparatus for detecting error of pipe and Method of detecting thereof | |
| EP1780607A3 (en) | Image forming apparatus, fixation device and heat control method for a fixation device | |
| WO2012166146A2 (en) | Intelligent sootblower | |
| MXPA99001539A (en) | Device of a rotary regenerative heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |