SE435545B - DEVICE FOR SPEED BED COMBUSTION OVEN - Google Patents

DEVICE FOR SPEED BED COMBUSTION OVEN

Info

Publication number
SE435545B
SE435545B SE7907227A SE7907227A SE435545B SE 435545 B SE435545 B SE 435545B SE 7907227 A SE7907227 A SE 7907227A SE 7907227 A SE7907227 A SE 7907227A SE 435545 B SE435545 B SE 435545B
Authority
SE
Sweden
Prior art keywords
fluidized bed
heat exchanger
medium
combustion chamber
pipes
Prior art date
Application number
SE7907227A
Other languages
Swedish (sv)
Other versions
SE7907227L (en
Inventor
O E Solheim N I Viken
Original Assignee
Hamjern As
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 Hamjern As filed Critical Hamjern As
Publication of SE7907227L publication Critical patent/SE7907227L/en
Publication of SE435545B publication Critical patent/SE435545B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1809—Controlling processes
    • 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/24—Devices for removal of material from the bed
    • F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/00044—Temperature measurement
    • B01J2208/00061—Temperature measurement of the reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/0015—Plates; Cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00256—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles in a heat exchanger for the heat exchange medium separate from the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00265—Part of all of the reactants being heated or cooled outside the reactor while recycling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00548—Flow

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Incineration Of Waste (AREA)
  • Treating Waste Gases (AREA)
  • Processing Of Solid Wastes (AREA)

Description

15 20 25 SD 35 7907227-7 2 Enligt föreliggande uppfinning, där värmt virvel- bäddsmedium kyles i en separat värmeväxlare och därefter transporteras tillbaka till bädden i brännkammaren, kan bäddtemperaturen hållas nere på en lämplig nivå. Avtapp- ningen kan lämpligen styras med hjälp av ett termostat, så att bädden kan hållas på en förbestämd, riktig temperatur. SD 20 7907227-7 2 According to the present invention, where heated fluidized bed medium is cooled in a separate heat exchanger and then transported back to the bed in the combustion chamber, the bed temperature can be kept at a suitable level. The drain can conveniently be controlled by means of a thermostat, so that the bed can be kept at a predetermined, correct temperature.

När virvelbäddmediet (vanligen sand) föres tillbaka till en övre del av brännkammaren, bidrar det till att sänka tempera- turen i zonen över virvelbäddskiktet. Sanden värmes och bädden tillföres värme från sanden, som faller ner genom de varma avgaserna från förbränningen. Införingspunkten för sand kan läggas där det är mest lämpligt med hänsyn till det använda bränslet. I V Uppfinningen beskrivs närmare i det följande i samband med ett utföringsexempel under hänvisning till ritningen, vilken visar ett schematiskt längdsnitt av en virvelbäddsugn. V Den visade virvelbäddsförbränningsugnen inne- fattar en reaktor eller en brännkammare 1, som delvis _ är fylld med ett kornformigt eller liknande medium 2, t.ex. sand. I 7 Bränslet tillföres ugnen genom en lämplig till- förselsanordning 6, t.ex. en skruvtransportör, som mynnar in i ugnens brännkammare 1. 7 Avgaserna från förbränningsugnen bortledes från brännkammaren genom ett utlopp 1%, som exempelvis kan leda till en (icke visad) ångpanna.When the fluidized bed medium (usually sand) is returned to an upper part of the combustion chamber, it helps to lower the temperature in the zone above the fluidized bed layer. The sand is heated and the bed is supplied with heat from the sand, which falls down through the hot exhaust gases from the combustion. The point of insertion for sand can be laid where it is most appropriate with regard to the fuel used. The invention is described in more detail in the following in connection with an exemplary embodiment with reference to the drawing, which shows a schematic longitudinal section of a fluidized-bed oven. The fluidized bed incinerator shown comprises a reactor or a combustion chamber 1, which is partially filled with a granular or similar medium 2, e.g. sand. I 7 The fuel is supplied to the furnace through a suitable supply device 6, e.g. a screw conveyor, which opens into the furnace's combustion chamber 1. 7 The exhaust gases from the incinerator are discharged from the combustion chamber through an outlet of 1%, which can, for example, lead to a steam boiler (not shown).

En värmeväxlare 16 är anordnad i den undre delen av virvelbädden 2 i förbränningskammaren eller reaktorn 1, och en avtappningsanordning 17 med ventil 11 är anordnad unmàrvärmeväxlaren, så att virvelbäddmedium, som tappas av från reaktorn, passerar genom värmeväxlaren på sin väg mot avtappningsanordningen. Således avtappas virvelskiktmedium i avkyld form. Värmeväxlaren kan bestå av en lämplig rör- anordning, t.ex. av ett antal vertikalt anordnade skiv- I formiga kylelement 18, ett inlopp med en pump 1 för kyl- mediet och ett utlopp för kylmediet. 10 15 20 7907227-7 3 Fluidiseringsluften tillföres via ett eller flera tillförselrör 19, som är förbundnaäned uppåt perforerade, i virvelbädden 2 fördelade fluidseringsrör 20. Virvel- bädden innefattar således en övre, fluidiserad zon över fluidiseringsrören 20, i vilken zon också förbränningen av det tillförda bränslet sker, och en undre, icke-fluidi- serad zon under fluidiseringsröret i området för värme- växlaren 16.A heat exchanger 16 is arranged in the lower part of the fluidized bed 2 in the combustion chamber or reactor 1, and a draining device 17 with valve 11 is arranged without the heat exchanger, so that fluidized bed medium discharged from the reactor passes through the heat exchange counter. Thus, fluidized bed medium is drained in cooled form. The heat exchanger may consist of a suitable pipe device, e.g. of a number of vertically arranged disk-shaped cooling elements 18, an inlet with a pump 1 for the coolant and an outlet for the coolant. The fluidizing air is supplied via one or more supply pipes 19, which are connected to upwardly perforated fluidizing pipes 20 distributed in the fluidized bed 2. The fluidized bed thus comprises an upper, fluidized zone above the fluidizing tubes 20, in which zone also the combustion of the fluid. the supplied fuel takes place, and a lower, non-fluidized zone below the fluidizing tube in the area of the heat exchanger 16.

Vid avtappning av.virvelbäddmedium (sand) genom avtappningsanordningen 17 avlägsnas sand från området om- kring värmeväxlaren, och den uttagna sandmängden kompen- seras med varm sand, som faller ned mellan fluidiserings- rören 20. Den varma sanden stryker förbi längs värme- växlarelementens 18 ytor innan den kommer till avtappnings- anordningen 17, och är där förhållandevis kall. Sanden transporteras tillbaka till förbränningskammaren 1 via en överföringsledning 12 till en sandfördelare 13 i bränn- kammarens övre del, varvid sanden kyler de utströmmande gaserna och på nytt fluidiseras.When draining fluidized bed medium (sand) through the draining device 17, sand is removed from the area around the heat exchanger, and the amount of sand extracted is compensated with hot sand, which falls down between the fluidization pipes 20. The hot sand passes along the heat exchanger elements 18 surfaces before it reaches the draining device 17, and is there relatively cold. The sand is transported back to the combustion chamber 1 via a transfer line 12 to a sand distributor 13 in the upper part of the combustion chamber, whereby the sand cools the effluent gases and is fluidized again.

Den avkylda sanden kan alternativt eller partiellt föras direkt tillbaka till virvelbädden för att kyla denna.The cooled sand can alternatively or partially be taken directly back to the fluidized bed to cool it.

Claims (5)

i 7907227-7 10 15 20 '25 30 PATENTKRAVi 7907227-7 10 15 20 '25 30 PATENTKRAV 1. ' 1.- Anordning vid virvelbäddsförbränningsugn innefattande en brännkammare (1), som innehåller ett virvelbäddsmedium, som åvärmes under förbränning av bränsle i virvelbädden, en värme- växlare och en anordning som åstadkommer att en del av virvel- bäddsmedietunder drift passerar värmeväxlaren och efter kylning i denna leds tillbaka till brännkammarens virvelbädd, k ä n n e- t e c kgn a d av att värmeväxlaren (16) är anordnad i en undre del av brännkammarens (1) virvelbädd (2) och att en anordning (17) för avtappning av virvelbäddsmedium.i ofluidiserat till- stånd från brännkammaren (1) under tyngdkraftens inverkan är an- ordnad under värmeväxlaren (16), så att det avtappade mediet passerar värmeväxlaren och att en anordning (12) för åter- föring av avtappat medium till brännkammaren är för handen.An apparatus for a fluidized bed incinerator comprising a combustion chamber (1) containing a fluidized bed medium which is heated during combustion of fuel in the fluidized bed, a heat exchanger and a device which causes a portion of the fluidized bed medium to pass through the heat exchanger and after cooling in it is led back to the fluidized bed of the combustion chamber, it is felt that the heat exchanger (16) is arranged in a lower part of the fluidized bed (2) of the combustion chamber (1) and that a device (17) for draining fluidized bed medium .in a fluidized state from the combustion chamber (1) under the influence of gravity is arranged below the heat exchanger (16), so that the drained medium passes the heat exchanger and that a device (12) for returning drained medium to the combustion chamber is at hand . 2. I Anordning enligt patentkravet 1, R ä n n e t e c k- nza d av att den omfattar ett antal i virvelbädden över värme- växlaren (16) fördelade rör (20) för utströmning av till rören fifiü.fluidiseringsluft, vilka rör (20) är försedda med perfore- ringar för tillförsel av fluidiseringsluften enbart till virvel- bäddsmediet, som är beläget över rören.Device according to claim 1, characterized in that it comprises a number of pipes (20) distributed in the fluidized bed over the heat exchanger (16) for outflow to the pipes fifi ü.fluidizing air, which pipes (20) are provided with perforations for supplying the fluidizing air only to the fluidized bed medium, which is located above the pipes. 3. Anordning enligt patentkravet 1 eller 2, k ä n n e- t e c k n a d av att värmeväxlaren (16) omfattar ett antal i huvudsak vertikalt orienterade, plattformade kylarelement (18), som är inbördes åtskilda för passage av virvelbäddsmedium som avtappas. 7Device according to claim 1 or 2, characterized in that the heat exchanger (16) comprises a number of substantially vertically oriented, flat-shaped cooling elements (18), which are mutually separated for passage of fluidized bed medium which is drained. 7 4. Anordning enligt någotavfpatentkraven 1 - 3, k ä n n e- t e c k n a d av att anordningen (12) för återföring av av- tappat medium mynnar ut i ett övre parti av brännkammaren (1). 'Device according to one of Claims 1 to 3, characterized in that the device (12) for returning drained medium opens into an upper part of the combustion chamber (1). ' 5. Anordning enligt något av patentkraven 1 - 4, k ä n n e- t e c k n a d av att avtappningsanordningen (17) innefattar en ventil (11) som är inrättad att styras av en termostat som av- känner den i virvelbädden (2) rådande temperaturen.Device according to one of Claims 1 to 4, characterized in that the draining device (17) comprises a valve (11) which is arranged to be controlled by a thermostat which senses the temperature prevailing in the fluidized bed (2).
SE7907227A 1978-09-04 1979-08-30 DEVICE FOR SPEED BED COMBUSTION OVEN SE435545B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO783018A NO783018L (en) 1978-09-04 1978-09-04 Fluidised bed incinerator.

Publications (2)

Publication Number Publication Date
SE7907227L SE7907227L (en) 1980-03-05
SE435545B true SE435545B (en) 1984-10-01

Family

ID=19884405

Family Applications (2)

Application Number Title Priority Date Filing Date
SE7907226A SE7907226L (en) 1978-09-04 1979-08-30 PROCEDURE FOR OPERATING A SPIRIT BED STOVE AND DEVICE FOR EXECUTIVE PROCEDURE
SE7907227A SE435545B (en) 1978-09-04 1979-08-30 DEVICE FOR SPEED BED COMBUSTION OVEN

Family Applications Before (1)

Application Number Title Priority Date Filing Date
SE7907226A SE7907226L (en) 1978-09-04 1979-08-30 PROCEDURE FOR OPERATING A SPIRIT BED STOVE AND DEVICE FOR EXECUTIVE PROCEDURE

Country Status (5)

Country Link
DE (2) DE2935542A1 (en)
FR (1) FR2434999A1 (en)
GB (1) GB2030275B (en)
NO (1) NO783018L (en)
SE (2) SE7907226L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796568A (en) * 1987-03-25 1989-01-10 Abb Stal Ab Power plant burning fuel in a fluidized bed
US4872423A (en) * 1987-03-25 1989-10-10 Abb Stal Ab Method for improving utilization of sulphur-absorbent when burning fuel in a fluidized bed and a power plant in which fuel is burned in a fluidized bed

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359968A (en) * 1979-01-10 1982-11-23 Foster Wheeler Energy Corporation Fluidized bed heat exchanger utilizing a baffle system
DE3115236A1 (en) * 1981-04-15 1982-11-04 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Fluid bed firing
GB2151503B (en) * 1981-12-15 1986-08-20 William Benedict Johnson Fluidized bed combustion apparatus and method of carrying out fluidized bed combustion
IT1155658B (en) * 1982-03-23 1987-01-28 Fata Ind Spa SYSTEM AND METHOD FOR THE RECOVERY OF SANDS CONTAINED IN FOUNDRY SHAPES AND SOULS BY CALCINATION IN A FLUIDIZED BED OVEN
FR2526182B1 (en) * 1982-04-28 1985-11-29 Creusot Loire METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE OF A FLUIDIZED BED
DE3320049C2 (en) * 1983-06-03 1987-01-08 Inter Power Technologie GmbH, 6600 Saarbrücken Fluidized bed combustion plant
DE3347023A1 (en) * 1983-12-24 1985-07-25 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Fluidised bed technology for small heating outputs
SE450164B (en) * 1985-10-22 1987-06-09 Asea Stal Ab SETTING TO ADJUST THE BED HEIGHT IN A POWER PLANT WITH A FLUIDIZED BED AND POWER PLANT WITH A CONTROL FOR THE BED HEIGHT
NO159879C (en) * 1986-05-02 1989-02-15 Santo As PROCEDURES FOR OPERATION OF A COMBUSTION PLANT, SEAT FOR IMPLEMENTATION.
FR2693729B1 (en) * 1992-07-16 1994-10-07 Bp Chemicals Snc Fluidized bed polymerization reactor and polymerization process.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2624302C2 (en) * 1976-05-31 1987-04-23 Metallgesellschaft Ag, 6000 Frankfurt Methods for carrying out exothermic processes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796568A (en) * 1987-03-25 1989-01-10 Abb Stal Ab Power plant burning fuel in a fluidized bed
US4872423A (en) * 1987-03-25 1989-10-10 Abb Stal Ab Method for improving utilization of sulphur-absorbent when burning fuel in a fluidized bed and a power plant in which fuel is burned in a fluidized bed

Also Published As

Publication number Publication date
NO783018L (en) 1980-03-05
DE2935542A1 (en) 1980-03-27
FR2434999A1 (en) 1980-03-28
SE7907226L (en) 1980-03-05
DE2935520A1 (en) 1980-03-13
SE7907227L (en) 1980-03-05
GB2030275B (en) 1983-05-25
FR2434999B1 (en) 1984-12-14
GB2030275A (en) 1980-04-02

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