US3367570A - Blower for oil gasification burners - Google Patents

Blower for oil gasification burners Download PDF

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Publication number
US3367570A
US3367570A US520270A US52027066A US3367570A US 3367570 A US3367570 A US 3367570A US 520270 A US520270 A US 520270A US 52027066 A US52027066 A US 52027066A US 3367570 A US3367570 A US 3367570A
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US
United States
Prior art keywords
exhaust gas
blower
burner
outlet channel
fresh air
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.)
Expired - Lifetime
Application number
US520270A
Other languages
English (en)
Inventor
Reichmann Horst
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Application granted granted Critical
Publication of US3367570A publication Critical patent/US3367570A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • 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
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/02—Baffles or deflectors for air or combustion products; Flame shields in air inlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/102—Control of recirculation rate

Definitions

  • bimetallic spring which, at temperatures substantially below the burner operating temperature, protrudes into the discharge channel and throttles primarily the flow of discharge gas therethrough.
  • a second bimetallic spring also is positioned in the discharge channel in the side occupied by the exhaust gas flow. This spring performs no throttling action at burner operating temperatures but at temperatures above the burner operating temperatures the second spring moves into the path of flow of the exhaust gas to throttle the same.
  • the present invention relates to a blower for oil gasification burners. It has already been proposed not only to feed fresh air to the suction side of the blower, but also a portion of exhaust gas from the area of the burner. By returning the exhaust gas through the blower a hot fresh air-exhaust gas mixture is supplied to the mixing chamber in which a gasification of the injected oil mist takes place, so that oil gasification may take place in a hot cyclonic turbulence of this mixture.
  • a burner of the type indicated is starting, thus prior to ignition thereof, the mixture portion sucked off from the burner area is heated, in a manner as already proposed, artificially, such as by electric heating. It has shown, however, that by the electric heating of the mixture portion the operating temperature of the mixture required for an unobjectionable operation of the oil gasification burner is not yet attainable so that there will occur diificulties in the ignition.
  • this object is attained by providing that the outlet channel of the blower has arranged therein a heat-sensitive throttling member, which throttles the outlet channel as long as the operating temperature of the fed mixture is not yet attained and which automatically enlarges the cross-section of the outlet channel as the temperature of the mixture increases.
  • a heat-sensitive throttling member which throttles the outlet channel as long as the operating temperature of the fed mixture is not yet attained and which automatically enlarges the cross-section of the outlet channel as the temperature of the mixture increases.
  • the throttling member is suitably formed by a bimetallic spring secured to the wall of the outlet channel, bent in cold state and protruding itno the outlet channel, which straightens when being heated and engages the wall of the outlet channel.
  • this throttling member provided also by a bimetallic spring secured to the wall of the outlet channel and engaging, however, the wall at operating temperature, which spring has about half the width of the outlet channel and is unilaterally arranged on the side of the exhaust gas feed and bends into the outlet channel with an increase in temperature.
  • FIGS. 1 and 2 An embodiment of the present invention is schematically illustrated in FIGS. 1 and 2 and described as follows:
  • a double blower is driven by a motor 1.
  • Motor 1 is connected to a shaft 2 which carries two impellers 3, 3'.
  • Impeller 3 sucks in fresh air through a channel 4.
  • An adjustable throttle valve 4' is mounted in channel 4.
  • Through a channel 5 the impeller 3 sucks in an exhaust gas portion from the area of a burner not shown, which is heated electrically prior to ignition of the burner during the starting period in a manner not shown.
  • the fresh air and the exhaust gas portion are fed by the impellers 3, 3 as juxtaposed streams into a common outlet channel 6 and from there into a mixing chamber not shown.
  • To the wall of outlet channel 6 there is secured a bimetallic spring 7 which is bent in cold state and abuts a stop 8 with a certain bias.
  • Bimetallic spring 7 defines a throttle gap 9 in the outlet channel 6.
  • Spring 7 is narrower than the outlet channel 6 and arranged unilaterally such that the exhaust gas stream fed by impeller 3 is impeded fully and the fresh air stream fed by impeller 3 is impeded only partly through throttle gap 9. Therefore, by the throttling bimetallic spring 7 not only is the flow rate reduced in outlet channel 6, but also the ratio of exhaust gas and fresh air is changed in the sense of a relative increase in the fresh air portion. When being heated the bimetallie spring 7 straigntens and engages the wall of the outlet channel 6 so that when the operating temperature is reached after ignition of the burner, throttling as at 9 will be discontinued automatically.
  • the wall of outlet channel 6 has secured thereto a further bimetallic spring 10 which is biased against the channel wall in cold state.
  • This bimetallic spring 10 is dimensioned and biased such that it starts bending only when the operating temperature is being exceeded and withdraws from the channel wall until it abuts a stop 12 and then defines a throttle gap 11.
  • the bimetallic spring 10 is designed so narrow and arranged unilaterally in the outlet channel 6 that it only throttles the exhaust gas stream fed by impeller 3. If the oil gasific'ation burner is started with reduced performance, thus, the fuel supply is reduced and at the same time the fresh air throttle valve 4' is closed further, the operating temperature may be exceeded due to the now relatively great exhaust gas portion. In such case, the bimetallic spring 10 becomes operative and reduces the exhaust gas portion by throttling in gap 11.
  • a blower device for an oil gasification burner which blower device is of the type having intake means through which the blower sucks in exhaust gas from the area of the burner and sucks in ambient fresh air and having a blower discharge channel into which a stream of exhaust gas and a stream of fresh air are delivered side by side
  • the improvement comprising: heat sensitive throttling means connected to said device to reduce the cross sectional area in the discharge channel to reduce the fluid flow therethrough so long as the temperature of the fluid therein is below a desired operating temperature and to automatically increase the cross sectional area as the temperature of the fluid approaches said Operating temperature, said throttling means being constructed and arranged to throttle the exhaust gas flow to a greater extent than it throttles the fresh air flow.
  • said discharge channel includes a wall and said throttling means comprises a bimetallic spring secured to said w'all, said spring being bent in the cold state and protruding into said discharge channel and straightening in the hot state to move toward said wall of said outlet channel.
  • the blower device is a double blower and the intake means comprises a first intake for the exhaust gas and a second separate intake for the fresh air with the blower feeding the exhaust gas stream and the fresh air stream in juxtaposed relationship into the common discharge channel and wherein said bimetallic spring is positioned so that a major part thereof is in the side of the discharge channel occupied by said exhaust gas stream.
  • said second heat sensitive throttling means comprises a second bimetallic spring secured to the wall of the outlet channel and lying flat against said wall at operating temperature and bent in the hot state above said operating temperature to protrude into said outlet channel, said second spring having about half the width of said discharge channel and being positioned on the side thereof occupied by said exhaust gas stream.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Spray-Type Burners (AREA)
  • Regulation And Control Of Combustion (AREA)
US520270A 1965-02-06 1966-01-12 Blower for oil gasification burners Expired - Lifetime US3367570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV0027697 1965-02-06

Publications (1)

Publication Number Publication Date
US3367570A true US3367570A (en) 1968-02-06

Family

ID=7583592

Family Applications (1)

Application Number Title Priority Date Filing Date
US520270A Expired - Lifetime US3367570A (en) 1965-02-06 1966-01-12 Blower for oil gasification burners

Country Status (9)

Country Link
US (1) US3367570A (fr)
AT (1) AT255626B (fr)
BE (1) BE675512A (fr)
CH (1) CH445702A (fr)
DE (1) DE1501944B2 (fr)
DK (1) DK105487C (fr)
FR (1) FR1464525A (fr)
GB (1) GB1126941A (fr)
NL (1) NL140961B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680006A (en) * 1985-05-16 1987-07-14 The Carlin Company Blower augmentor for power oil and power gas burners
US4740138A (en) * 1985-12-04 1988-04-26 MTU Motoren-und Turbinen-Munchen GmbH Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine engine
US4767317A (en) * 1985-01-26 1988-08-30 Carl Kramer Apparatus for mixing a gas main flow with at least one gas subflow
US4926765A (en) * 1986-12-11 1990-05-22 Walter Dreizler Furnace blower with external gas recycling for the reduction of NOx
US20030099539A1 (en) * 2001-11-08 2003-05-29 Markus Preinfalk Radial pump
US20150361990A1 (en) * 2013-02-08 2015-12-17 Sulzer Management Ag Flow machine, and flow guiding element for a flow machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184224A (en) * 1985-12-11 1987-06-17 Willey Robinson Ltd Gas-fired heating appliance

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462488C (de) * 1928-07-12 Heenan & Froude Ltd Schleudergeblaese mit zweiseitig ansaugendem Laufrad und axial verstellbaren Diffusorwaenden
US1929776A (en) * 1931-10-24 1933-10-10 Churchill Cabinet Company Telephone booth
US2292082A (en) * 1940-09-18 1942-08-04 Motor Wheel Corp Temperature control
US2788171A (en) * 1953-07-30 1957-04-09 Surface Combustion Corp Fan apparatus
US2789808A (en) * 1954-11-05 1957-04-23 Lee Wilson Method of and apparatus for controlling circulation of furnace atmosphere
USRE24421E (en) * 1958-01-28 patrick
US3038698A (en) * 1956-08-30 1962-06-12 Schwitzer Corp Mechanism for controlling gaseous flow in turbo-machinery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462488C (de) * 1928-07-12 Heenan & Froude Ltd Schleudergeblaese mit zweiseitig ansaugendem Laufrad und axial verstellbaren Diffusorwaenden
USRE24421E (en) * 1958-01-28 patrick
US1929776A (en) * 1931-10-24 1933-10-10 Churchill Cabinet Company Telephone booth
US2292082A (en) * 1940-09-18 1942-08-04 Motor Wheel Corp Temperature control
US2788171A (en) * 1953-07-30 1957-04-09 Surface Combustion Corp Fan apparatus
US2789808A (en) * 1954-11-05 1957-04-23 Lee Wilson Method of and apparatus for controlling circulation of furnace atmosphere
US3038698A (en) * 1956-08-30 1962-06-12 Schwitzer Corp Mechanism for controlling gaseous flow in turbo-machinery

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767317A (en) * 1985-01-26 1988-08-30 Carl Kramer Apparatus for mixing a gas main flow with at least one gas subflow
US4680006A (en) * 1985-05-16 1987-07-14 The Carlin Company Blower augmentor for power oil and power gas burners
US4740138A (en) * 1985-12-04 1988-04-26 MTU Motoren-und Turbinen-Munchen GmbH Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine engine
US4752182A (en) * 1985-12-04 1988-06-21 Mtu Motoren-Und Turbinen-Munench Gmbh Device for the open- or closed-loop control of gas turbine engines or turbojet engines
US4926765A (en) * 1986-12-11 1990-05-22 Walter Dreizler Furnace blower with external gas recycling for the reduction of NOx
US20030099539A1 (en) * 2001-11-08 2003-05-29 Markus Preinfalk Radial pump
US6755609B2 (en) * 2001-11-08 2004-06-29 Tcg Unitech Aktiengesellschaft Radial pump
US20150361990A1 (en) * 2013-02-08 2015-12-17 Sulzer Management Ag Flow machine, and flow guiding element for a flow machine
US10634164B2 (en) * 2013-02-08 2020-04-28 Sulzer Management Ag Flow machine, and flow guiding element for a flow machine

Also Published As

Publication number Publication date
DE1501944A1 (de) 1969-06-26
NL140961B (nl) 1974-01-15
NL6517109A (fr) 1966-08-08
GB1126941A (en) 1968-09-11
DE1501944B2 (de) 1972-01-13
CH445702A (de) 1967-10-31
AT255626B (de) 1967-07-10
FR1464525A (fr) 1966-12-30
BE675512A (fr) 1966-05-31
DK105487C (da) 1966-10-03

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