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EP0656509A1 - Dispositif de regulation d'une flamme - Google Patents

Dispositif de regulation d'une flamme Download PDF

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Publication number
EP0656509A1
EP0656509A1 EP93913672A EP93913672A EP0656509A1 EP 0656509 A1 EP0656509 A1 EP 0656509A1 EP 93913672 A EP93913672 A EP 93913672A EP 93913672 A EP93913672 A EP 93913672A EP 0656509 A1 EP0656509 A1 EP 0656509A1
Authority
EP
European Patent Office
Prior art keywords
pressure
flame
casing
source
generator
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.)
Withdrawn
Application number
EP93913672A
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German (de)
English (en)
Other versions
EP0656509A4 (fr
Inventor
Igor Ivanovich Vlasov
Rafik Gumarovich Khairullin
Vladimir Mikhailovich Shkedov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TATARSKOE PROIZVODSTVENNOE OBIEDINENIE ENERGETIKI I ELEKTRIFIKATSII " TATENERGO"
Original Assignee
TATARSKOE PROIZVODSTVENNOE OBIEDINENIE ENERGETIKI I ELEKTRIFIKATSII " TATENERGO"
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TATARSKOE PROIZVODSTVENNOE OBIEDINENIE ENERGETIKI I ELEKTRIFIKATSII " TATENERGO" filed Critical TATARSKOE PROIZVODSTVENNOE OBIEDINENIE ENERGETIKI I ELEKTRIFIKATSII " TATENERGO"
Publication of EP0656509A1 publication Critical patent/EP0656509A1/fr
Publication of EP0656509A4 publication Critical patent/EP0656509A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F23M11/045—Means for supervising combustion, e.g. windows by observing the flame

Definitions

  • the present invention relates to automatic devices to check furnace devices of various designs, mainly power boiler furnaces, and more specifically, devices for checking flame for presence.
  • ionization devices are equipped with electroinsulated electrodes, inserted into flame.
  • the opticoelectronic indicators feature a low reliability because of a short service life of emitters and radiation receivers, sensitivity to contamination and low selectivity in flame checking.
  • the main idea of the present invention is realization of a flame presence ckecking procedure, based on utilization of gas-dynamic effects, taking place during interaction of streams, flowing into the furnace volume, with the burning zone; as this takes place the stream flow can be either specially formed, or a stream flow of a burner device, like of an ignition nozzle, used.
  • At the base of the invention is, in particular, a static pressure variation effect in the close-to-the-axis part of the twisted stream when it flows into the burning zone, and, namely, disappearance of rarefaction in the close-to-the axis part of the twisted stream during burning.
  • a device for flame checking a stream flame detector, at the base of which is the dependence of the pneumatic throttle resistance on the temperature of the working mass with the consumption of said working mass being metered, for instance, by another throttle (SU- A- 1152324).
  • Said device features a number of advantages over the ionization and opticoelectronic devices, and among other things, a high selectivity in flame checking and a zero sensitivity to radiant thermal flows.
  • the indicated device for flame checking comprises a heat exchanger with an intershroud cavity and a heat-exchanging pipe, two throttles, one of which is connected to the internal cavity of the combustion chamber (furnace) outside of the burning zone, two auxiliary throttles, a differential converter, a variable volume chamber and an exhaust.
  • the device described above is provided with a through pneumatic bridge whose shoulders are two throttle reducers, the so-called “hot” and “cold” reducers.
  • One diagonal of the bridge is fed with rarefaction, built up at the exhaust, made up as an ejector, while in the other diagonal an outlet signal is generated in the form of a pressure differential, which is fed to a differential pneumatic relay, closing and opening electric contacts.
  • Said device operates as follows: In the mode without burning, pressure in the interthrottle volume of the "cold" reducer is lower than that in the "hot” reducer, the sign of pressure differential between them is such, that the relay membrane is caved in and does not close the contacts. In the course of burning to the inlet of the "hot" reducer high-temperature end products of combustion are supplied, which transfer heat to the walls of the cooling shroud within the interthrottle volume of the reducer.
  • Said device displays a fair reliability when operating with clean working masses, for instance, with the end products of aviation kerosine combustion, natural gas, propane-butane mixture, combines a relatively simple construction with a sufficiently fast action, possesses a flame checking selectivity.
  • the device indicated above has been successfully used in cases which could have provided a source of rarefaction and conditions for operation in relatively clean end products of combustion, since the device sucks in a sample of the working mass from the combustion zone and the end products of thermal distruction can lodge in the through part of the device, while sulphur oxides and ash remnants, developing during burning, may cause corrosion and errosive wear of the input throttle of the "hot" reducer as well as when the requirements to the level of the output signal (a pressure differential does not exceed 40% of the rarefaction value) are not strictly observed.
  • a device to check flame for presence comprising a through casing, which is connected to a fluid medium source under pressure, located closely to one of its ends and at the opposite end having a fluid medium stream shaping source, a differential pneumatic relay and two pressure bleeding pipes, connected by means of the first ends, each with a respective cavity of the pneumatic relay, and by means of the second ends, one of which having a probable flame zone and the other pipe, with an area outside of said zone (SU- A- 1273693).
  • the pressure bleeding pipes are provided with four throttles, mounted in pairs and in succession and forming two through pressure reducers with interthrottle cavities between the input and output throttles, the so-called “cold” and “hot” reducers, connected to a differential pneumatic relay, while in the interthrottle cavity of one of the reducers there is mounted a small-sized combustion chamber, an output throttle of said reducer having a form of a nozzle with the fluid medium source (compressible working mass) under an excessive pressure being connected to the input throttles of both reducers.
  • An advantage of said device over the above-described one consists in the fact that said device does not need any source of rarefaction and it does not suck in a sample of the end products of combustion, but vice versa said products come out of the device.
  • the aforementioned device operates as follows.
  • Said device has a limited service life, because of corrosion and erosion of the nozzle, a low level of the output signal, since a pressure jump, which depends on the relations of hydraulic resistances of the input throttle of the "hot" reducer and of the nozzle as well as on the relation between the temperature of combustion and the temperature of air, has a value less than 30% of the excessive air pressure in front of the device, a possibility to use for burning indication in small-sized combustion chambers, ignition devices, for instance. All these results in a low design reliability and a low operational reliability.
  • the base of the present invention is a task of creating a device to ckeck flame for presence, the design of which makes it possible to reduce the thermal and chemical effects on the components of the device construction, which determine the quality of its operation, increase the adjustment stability, reduce the probability of firing in the through part of the device, increase the level of the output signals up to the values commensurable with the excessive supply pressure or surpassing it, which in the long run can improve the design reliability of the device and its reliability in operation.
  • the aim is achieved by equipping the design of the flame checking device with a through casing, connected with a fluid medium source under excessive pressure, close to one of the casing ends, and by providing the opposite output end with a fluid medium stream shaping means, a differential pneumatic relay and two pressure bleeding pipes, the first ends of which are connected with an appropriate cavity each of the pneumatic relay, while the second ends of the pipes are connected as follows: one pipe with a zone of probable flame and the other pipe with an area outside the said zone, according to the invention, the fluid medium stream shaping means is made up in a form of two coaxially disposed generators of twisted streams, external and internal ones, mounted coaxially to the casing at its output end, with the end of the first pressure bleeding pipe, located in the casing coaxially to the internal generator of the twisted stream and linked via the internal volume of said generator with the zone of probable flame.
  • both fluid medium pressure sources use a compressible working medium and both sources are joined into one combined source with one of the coaxially disposed volumes of the casing, coupled with the aggregate source of an excessive pressure through a reducing means.
  • An embodiment of the device is possible in which one source of pressure uses a compressible propulsion mass as a fluid medium, while the second source for a fluid medium uses an incomressible propulsive mass.
  • a twisted stream generator in a form of consecutively connected cylindrical twisting chamber with tangentially disposed nozzles, coupled with the internal volume of the casing, a cylindrical channel and a diffusor, whereas the first pressure bleeding pipe is linked with the internal generator via the central opening, manufactured in the side end wall of the cylindrical twisting chamber and in line with it.
  • the cavity of the casing internal volume is linked with an incompressible propulsive working mass pressure source
  • the cavity of the casing external volume is linked with an excessive pressure source of the compressible working mass
  • Such a device can also be provided with an ejector, disposed outside the casing with the ejector nozzle input being connected to the excessive pressure source output of the compressible propulsive mass to connect the mixing chamber input with the input end of the second pressure bleeding pipe, whereas to dispose the diffusor output end in the space, adjacent to the zone of probable flame existance.
  • Such an embodiment of the applied flame presence checking device features reliable functioning and a high design reliability, which permits the employment of it in furnace process control systems, to reduce damage, caused by bursts in furnace chambers and distruction of equipment.
  • the flame presence checking device comprises a main casing 1 (Fig.1), into the cavity of which a compressible working mass is fed from a source 2 of an excessive pressure relative to the pressure in a furnace, for instance, of an air of a forced-draft fan or a compressor.
  • a source 2 of an excessive pressure relative to the pressure in a furnace for instance, of an air of a forced-draft fan or a compressor.
  • the casing 1 there are disposed two pressure bleeding pipes 5 and 6, mechanically linked with the casing 1.
  • the first pipe 6 To the working side end of the casing 1, looking at the flame (furnace) being checked, run is the first pipe 6, connected with the zone of probable flame via the internal volume of the generator 4 to bleed pressure in the furnace, whereas the second pipe 5 is disposed coaxially with the pipe 6 and connected with the area outside of a zone, probably containing flame.
  • the pipes 5 and 6 are connected to a differential pneumatic relay 7.
  • the applied device is designed for checking flame for presence, preferably of burners, operating on gaseous fuel and it is perceived that to ensure a reliable contact of the twisted streams with flame, the casing 1 is dipped into the flame to a small depth.
  • the main generator according to the diagram is an internal one 4 through which the smallest part of the compressible working mass, taken from the source 2, usually runs.
  • Applied device is reliably cooled by air, flowing over the casing 1 and flowing through the twisted stream generators 3 and 4, which ensures a great service life and excludes the effect of aggressive mediums (furnace gases) on the construction components.
  • the device according to the invention reliably checks flame, since rarefaction inside the main twisted stream, coming out of the generator 4, depends on the presence or absence of the flame, a change in rarefaction is transferred to the relay 7 via the generator 4 and the pipe 6. Thanks to this fact, the device looks as if it "knows" where the twisted streams goes: to a place with burning or not.
  • the device according to the invention as illustrated in Fig.2, is made up similarly to the one, displayed in Fig.1.
  • a difference consists in the provision of the device, according to Fig.2 , with an auxiliary partition 8, manufactured in the form of a tube, mounted in the casing between the twisted stream generators 3 and 4 and in line with the latter so that two isolated volumes are formed: an external volume I and an internal volume II with the volume II communicating with an excessive pressure source 2 of compressible working mass directly, whereas the volume I, via a reducing means.
  • a device according to the invention illustrated in Figs. 3 and 4, is made up similarly to the device, displayed in Fig.2.
  • the device according to the invention is actually a burner or an injector, which is able to check its own flame.
  • the fuel pressure source 9 is a source of gaseous fuel pressure
  • the device, according to the invention, as illustrated in Fig.3, is a gaseous, burner (an ingnition device burner, a pilot burner, a main burner). Due to burning that takes place close to the outlet of the twisted stream out of the generator 4, where it has an influence on the rarefaction value inside the twisted stream, said device possesses an extremely high selectivity of the flame checking, which means that the effect of burning of other burners on the rarefaction value is practically absent.
  • the device according to the invention is actually an injector with steam-and-mechanical or air atomization of the fuel, in this case the external generator 3 besides stream twisting, required for operation, simultaneously acts as a means of atomization.
  • the source 2 operates as a steam pressure or compressed air source.
  • the device in the second case with the fuel pressure source 9 (Fig. 4), connected to the external volume I , the device, according to the invention, constitutes actually an injector with mechanical fuel atomization, having an in-built burning indicator, the function of which is performed preferably by the internal twisted stream generator 4, fed from the source 2, in this case from a compressed air pressure source.
  • the device according to the invention possesses in addition to the above-mentioned advantages, a high selectivity in flame checking thanks also only to the effect of burning of rarefaction inside the twisted stream and connected with this event heat radiation inside its own flare under check.
  • the external twisted stream generator 3 (Fig.5) is made up in the shape of a spiral swirler 10, in one of whose channels there is a radial hole 11 made by means of which the pipe 5 communicates with the area adjoining the zone of a probable flame to be checked.
  • the spiral swirler 10 is one of the most popular embodiments of the twisted stream generators. In this case the embodiment is convenient, since the swirler 10 channel constitutes a separate nozzle, in which the flow velocity amounts to a small value.
  • the device when fed with fresh air, is designed to check the flame of the principle furnace burners with various functions, but when it is fed with a gas-and-air mixture, its function is to check the flame of the ignition devices and pilot burners of their own.
  • the device according to Fig. 6 is manufactured similarly to the device, illustrated in Fig.2.
  • the jet screen makes it possible to lower the temperature of the casing 1, which has a beneficial effect on the service life of the device.
  • the device is designed to check flame of the principle burners, operating on a gaseous fuel.
  • the internal twisted stream generator 4 (Fig.7) is made in the form of successively connected a cylindrical chamber 13 of twisting with tangential nozzles 14, communicating with the internal volume II of the casing 1, a cylindrical channel 15 and a diffusor 16, while the pressure bleeding pipe 6 being connected with the internal generator 4 via the central hole 17, made up in the wall of the cylindrical chamber 13 of twisting in line with the chamber 13.
  • the internal generator 4 made up as it is described in the device according to Fig.7, is optimal as a sensitive element of the applied device to check flame for presence and give a chance to build up a pressure jump in the course of inflammation (an original output signal), exceeding the supply pressure 1.2-1.8 times.
  • a high level of the output signal assists in reliability of the device functioning and permits the device supply from a low-pressure forced-draft fan, which extends the application of the device.
  • the internal generator 4 should be made up as it is described above in the device, intended to check flame for presence in the principle burners (source 2- a low-pressure air source), to check flame for presence in the ignition and pilot burners proper (source 2 - a low-pressure gas-and-air mixture source) as well as in injectors with mechanical atomization of fuel, as an in-built device to check flame of the burning flares of just these injectors (source 2 - a source of low-pressure air).
  • the internal twisted stream generator 4 (Fig.8) is made up as described in the device as illustrated in Figs 1,2, 6, whereas the twistted stream generator 3 is manufactured as a centrifugal injector 18 and constitutes in fact an injector with an inbuilt device to check flame of the burning flare of its nozzle.
  • the twisting of the streams in the internal and external twisted stream generators 3 and 4 should be concurrent (the directions of twisting should coincide).
  • the device according to Fig.8 features an especially high design reliability, connected with an effective fluid cooling of the casing 1.
  • the internal twisted stream generator 4 (Fig.9) is made up in the form of an centrifugal injector 19, whereas the external twisted stream generator is made up in the form of a disposed coaxially with the casing 1 and in succession along the run of the working mass after the injector 19 and interconnected: a cylindrical chamber 13' of twisting, the diameter of which exceeds the diameter of the injector 19 twisting chamber and equipped with tangential chambers 14, by means of which the chamber 13' is linked with the external circular volume I, the cylindrical channel 15 and the diffusor 16, in the process the pressure bleeding pipe 6 communicates with the cylindrical channel 13', which runs via the twisting chamber of the centrifugal injector 19 and in line with it.
  • the applied device constitutes actually an injector with a steam or air atomization, in which a high-rate twisting of the stream, necessary to organize the working process, creates an external generator 3 - a steam or air atomizer.
  • the introduction of the branch pipe 20 has been caused by the fact that in spite of a gas eddy flow that takes place inside the injector 19 close to the axis of the latter running in the operating mode, and said flow can be used in principle to transfer a pressure impulse, in the transitional modes (when the fluid fuel supply is cut in and out) the fluid fuel can get into the pipe 6 and a violation of the applied device operation may occur.
  • the branch pipe 20 is introduced into the root part of the external generator 3 stream, with a high angular velocity of eddy movements, due to which fuel particles are thrown to the periphery and clogging of the branch pipe 20 becomes impossible.
  • the device according to Fig. 10 is made up like the device, illustrated in Fig.1.
  • a difference consists in the provision of the device according to Fig. 10 with an ejector 21, disposed outside the casing 1, through which the pipe 5 communicates with the volume, adjoining the zone 1, inside of which there is flame to be checked, and an active nozzle 22, which is connected with the compressible working mass excessive pressure source 2.
  • the pipe 5 is disposed outside the casing 1.
  • Said device is designed for checking the injector flare of its own, having a stream-mechanical, air, as well as mechanical atomization of the fluid fuel.
  • the principle of operation of the applied device involves the following.
  • the excessive pressure source 2 is certain to be a source of the compressible working mass excessive pressure, because only in this case heat supply, linked with the suction up of hot end products of combustion, can cause a rise in pressure.
  • the applied device is to have a contact with flame under check or at least it should be disposed in close vicinity to it so as to effect said suction up of hot end products of combustion by the stream.
  • the applied device is provided with a protection facility against heating by radiation and convective thermal flows. Since the flow rate of the compressible working mass, required for the internal generator 4 operation is small and, as a rule, insufficient for cooling the casing 1, the flow rate in the casing 1 is increased by disposing the greatest part of the working mass into the volume, where flame is being checked. This greatest part of the working mass flow is also subject to twisting, and it should be twisted with the same sense as the stream at the output of the generator 4, so as to avoid disturbing the flow pattern close to the device output. These functions are accomplished by the external twisted stream generator 3, from which the twisted stream "e" is flowing out.
  • the device when a source of compressed air is employed, can be used to ckeck flame of the principle burners of power boiler furnaces, whereas when a source of a gas-and-air mixture is employed, to check its own flame of the ignition and pilot burners.In the latter case the both streams constitute stream of a combustible mixture, the burning of which aids in the increase of a pressure jump during inflammation.
  • a typical characteristic of the applied device the dependence of rarefaction on the supply pressure (P2 is a pressure in the source, the abscissa axis, P6 is a pressure in the pipe 6, the axis of ordinates) and a pressure jump "h" (rarefaction) during firing are shown in Fig.12, where a line “n” denotes the mode without burning, and a line “g", the mode with burning.
  • auxiliary partition 8 due to which the working mass flows, delivered to the twisted stream generators 3 and 4, are separated, which also aids in preserving a sufficiently high total pressure upstream of the generator 4 and in the long run results in an increase of the output signal level, since a sufficiently high level of rarefaction is preserved in the mode without burning, when there is no flame, and at the same time a great value of the pressure jump, developing if rarefaction disappears in the mode with burning, when flame is present.
  • the introduction of the fuel pressure source 9 (Fig. 3, 4) provides for extension of the application sphere.
  • the device In case the fluid fuel pressure source 9 (Fig.3) is connected with the internal volume II of the casing 1, whereas the source 2 - a steam pressure or compressed air source is connected with the external volume I of the casing 1, the device operates as an injector with steam-mechanical or air atomization, which checks burning of its own flare.
  • the external generator 3 in this embodiment of the device functions as a main source of the flow twisting and simultaneously as an atomizer, since the rate of a steam or air stream is essentially higher than the rate of fluid stream outflow.
  • the device in this embodiment, can be used as an injector with a mechanical fuel atomization and as a flame checking device with a low-pressure supply of the internal generator 4.
  • the cooling of the casing 1 with a liquid fuel is effective and the service life of the device is increased.
  • the source 2 in said embodiment of the device can be of a low-pressure type, since the internal generator 4, which does not perform an additional function of an atomizer, can have an optimal through part from the point of view of building up a deep rarefaction and a pressure jump after the emergence of flame, which will be displayed later.
  • the manufacture of the external generator 3 in the form of a spiral swirler 10, provided with a radial hole 11 in one of the channels of the swirler 10, used to connect the pipe 5 with a volume, where flame is being checked, makes it possible to achieve a change in the pressure differential sign at the membrane of the pneumatic relay 7 thanks to a rarefaction, acting in the channel of the swirler 10 which assists in additionally increasing the functional reliability of the applied device operation in general.
  • a change of sign of the pressure differential P5,P6 (P is the axis of ordinates), supplied to the pneumatic relay 7 by means of the pipes 5 and 6 in this embodiment of the device, takes place when flame appears or disappears irrespective of the supply pressure P2 (the abscissa axis), as shown in Fig. 14a.
  • Fig.7 display an embodiment of the device whose internal generator 4 of the twisted stream is made up in the from of successively connected: a cylindrical chamber 13 of twisting with tangential nozzles 14, a cylindrical channel 15 and a diffusor 16, whereas the connection of the pipe 6 to the internal generator 4 is carried out via a hole 17 in the wall of a twisting cylindrical chamber 13.
  • the output signal - rarefaction is considerably increased in the cylindrical chamber 13 (Fig.7) and a pressure jump (rarefaction) during flame emergence.
  • a pressure jump rarefaction
  • the value of the pressure jump essentially exceeds the supply pressure value.
  • the essence of the problem is as follows: a twisted stream in the cylindrical chamber 13 and especially in the cylindrical channel 15, possesses much higher angular rates of rotation than the twisted flow in the cone-shaped stream outside the device.
  • the operation of the device in said embodiment differs from the preceding embodiments only by the fact that the end products of combustion are sucked up out of the volume where flame is being checked, not only into the twisted stream, but inside the conical 16 and cylindrical 16 diffusors, simultaneously heating a cold flow close to the walls in the indicated diffusors and increasing (in the mode of burning with flame present) the hydraulic resistance of the diffusors 15, 16, preferably of the diffusor 15, which results in a sharp rise of pressure in the chamber.
  • the conical diffusor 15, mounted after the cylindrical diffusor 15, serves preferably to give a direction to the twisted stream, adhering to the walls of the diffusor 16.
  • the twisted stream generator displays a clearly defined instability in the motion of dust particles, unburnt fuel, as due to high angular rates of the flow rotation in the diffusor 15, the particles are efficiently thrown by the centrifugal forces towards the walls of the diffusor 15 and without reaching the walls, they are blown by a high-velocity cold flow close to the walls back out of the device.
  • the applied device is not contaminated by particles and features a high reliability in functioning in dusty and contaminated medium.
  • the trajectories of particles "f" and the border of particle penetration into the device according to Figs 1,2, 6 are shown in Fig.15.
  • Fig.8 displays an embodiment of the device according to Fig.4, in which the internal generator 4 comprises a cylindrical chamber 13, and cylindrical 15 and conical 16 diffusors to form a signal of a higher level, while the external generator 3 is an injector with mechanical atomization of the fluid fuel.
  • a merit of said embodiment of the device is a reliability in functioning as a burning indicator with a low-pressure source 2 of the compressible working mass excessive pressure and a selectivity in flame checking.
  • Fig.9 shows an embodiment of the device according to Fig.3, in which the internal generator 4 is a centrifugal injector 19.
  • the device is provided with a branch pipe 20, mounted coaxially with the internal generator 4.
  • the branch pipe 20 runs through a gas eddy flow of the injector 19, with no effect on the operational characteristics of said injector, and serves to prevent the fluid fuel from getting into the pipe 6 (Fig.3) during cutting in and cutting out of the source 9.
  • Said embodiment is designed to check flame for presence in the injector flare with steam-and-mechanical or air atomization.
  • a merit of the indicated embodiment of the device is a simplicity of its design.
  • Fig.10 shows an embodiment of the device to check flame for presence, which is provided with an ejector 21, an active nozzle 22 of which is connected with the source 2 and the pipe 5, whereas the output is directed towards the volume, where flame is being checked.
  • the ejector 21 is a gas-dynamic appliance, similar to the twisted stream generator 4, and when fed from the excessive pressure source 2, it builds up a rarefaction proportional to the rarefaction in the twisted stream generator 4.
  • a rarefaction in the ejector 21 is selected a bit smaller than that in the generator 4 in the mode without burning, when there is no flame.
  • a pressure differential at the membrane of the pneumatic relay 7 changes its sign.
  • the application of the ejector 21 is equal to the introduction of the radial channel II in the spiral swirler 10, as illustrated in Fig.5.
  • the applied flame checking device possesses a high constructional reliability and it is marked by a reliability in functioning.
  • the flame checking device can be employed to generate signals, indicating the presence (absence) of flare burning of principle burners, operating on a gaseous or fluid fuels (water-coal suspensions included), as well as flares of ignition devices in the control systems of furnace processes, the presence (absence) of flame in burner means with various functions in energetics, petrochemistry and metallurgical engineering.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP19930913672 1993-05-21 1993-05-21 Dispositif de regulation d'une flamme. Withdrawn EP0656509A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU1993/000116 WO1994028356A1 (fr) 1993-05-21 1993-05-21 Dispositif de regulation d'une flamme

Publications (2)

Publication Number Publication Date
EP0656509A1 true EP0656509A1 (fr) 1995-06-07
EP0656509A4 EP0656509A4 (fr) 1996-11-04

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EP19930913672 Withdrawn EP0656509A4 (fr) 1993-05-21 1993-05-21 Dispositif de regulation d'une flamme.

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EP (1) EP0656509A4 (fr)
WO (1) WO1994028356A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090208889A1 (en) * 2005-06-27 2009-08-20 Jean-Claude Pillard Burner
CN115076691A (zh) * 2022-06-15 2022-09-20 北京航化节能环保技术有限公司 一种线性火焰的造型方法

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Publication number Priority date Publication date Assignee Title
CN114459053B (zh) * 2022-02-08 2023-10-17 深圳市振邦智能科技股份有限公司 一种电子打火与火焰检测电路

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US20090208889A1 (en) * 2005-06-27 2009-08-20 Jean-Claude Pillard Burner
US9011141B2 (en) * 2005-06-27 2015-04-21 Egci Pillard Burner
CN115076691A (zh) * 2022-06-15 2022-09-20 北京航化节能环保技术有限公司 一种线性火焰的造型方法

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WO1994028356A1 (fr) 1994-12-08
EP0656509A4 (fr) 1996-11-04

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