EP1130320B1 - Système de commande pour chaudières - Google Patents

Système de commande pour chaudières Download PDF

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Publication number
EP1130320B1
EP1130320B1 EP00200749A EP00200749A EP1130320B1 EP 1130320 B1 EP1130320 B1 EP 1130320B1 EP 00200749 A EP00200749 A EP 00200749A EP 00200749 A EP00200749 A EP 00200749A EP 1130320 B1 EP1130320 B1 EP 1130320B1
Authority
EP
European Patent Office
Prior art keywords
fan
burner
gas
thermostat
signal
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
EP00200749A
Other languages
German (de)
English (en)
Other versions
EP1130320A1 (fr
Inventor
Giorgio Ing. Pastorino
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.)
Riello SpA
Original Assignee
Riello SpA
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 Riello SpA filed Critical Riello SpA
Priority to EP00200749A priority Critical patent/EP1130320B1/fr
Priority to DE60032725T priority patent/DE60032725T2/de
Priority to AT00200749T priority patent/ATE350625T1/de
Priority to ES00200749T priority patent/ES2277584T3/es
Priority to CNB011109785A priority patent/CN1185442C/zh
Publication of EP1130320A1 publication Critical patent/EP1130320A1/fr
Priority to HK03104773.2A priority patent/HK1053350B/zh
Application granted granted Critical
Publication of EP1130320B1 publication Critical patent/EP1130320B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/26—Details
    • F23N5/265—Details using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/10—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F23N2227/16—Checking components, e.g. electronic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements

Definitions

  • a combined gas-air control system according to the preamble of claim 1 is known from document EP-A-0 909 922.
  • the required temperature is selected by means of a potentiometer P1 and is compared in the circuit PID A with the temperature detected by sensor S1.
  • the fan speed is calculated in order to achieve the required capacity.
  • the fan speed is controlled by means of an adjustment system PID B to assure the steadiness of the required speed using as feedback signal the vacuum existing in the combustion chamber sensed by the analogue pressure switch P.A.D..
  • control originates the current value to be sent to the modulator so that a constant and optimum air-gas ratio is achieved. This assures the combustion with emission values within the required limits while maintaining an optimum efficiency at any thermal load.
  • thermostat on the burner assures that the boiler is always operating within the required emission limits and in full safety.
  • the burner as a function of its temperature, can stop the flame in case of an abnormal temperature rise due to a failure on the air or gas control system.
  • Such thermostat is placed electrically in series to the already existing limit thermostat. An intervention of this thermostat then places the boiler in a status of involatile shutdown.
  • Fig. 2 also shows the block A.C.F. that checks the presence of the flame and assures the safety functions by acting on the gas valve operating devices.
  • Fig. 3 shows the functional diagram of such system.
  • T represents the value for sanitary (or ambient heating) temperature required and determined by potentiometer P1.
  • T (SS) represents the value of the water temperature detected by sensor S1.
  • error e(T) is applied to a control system PID represented by blocks Kp e(T), Ki Int[e(T)], Kd d[e(T)]e A2 in order to obtain the value V(H) representing the value of the required vacuum in the combustion chamber of the thermal load.
  • This value is compared in the sum block A4 with the feedback value Vc(H) originated by P.A.D. corresponding to the value of vacuum actually created by the fan.
  • the feedback value Vc(H) originated by P.A.D. is also used as input of the block T generating I(mod), the modulator current value, according to a predetermined curve correlating Vc(mod) to I(mod) in order to maintain the ratio air (produced by the fan at a speed VF) and gas (produced by the modulator with a current I(mod) and to grant an optimum combustion while maintaining a steady thermal efficiency by varying loading conditions.
  • the current of value I(mod) applied to the modulator of the gas valve produces the actual pressure P (gas) in the combustion chamber.
  • the burner thermostat (THERM BURN) turns on and provides to switch-off the burner thus bringing the boiler to safety shutdown
  • the required temperature is selected by means of a potentiometer P1 and is compared in the circuit PID A with the temperature detected by sensor S1.
  • the fan speed is calculated in order to obtain a steady air-gas ratio and to assure the combustion with emission values within the required limits, while maintaining an optimum efficiency at any thermal load
  • the fan Upon demand of heat, the fan is started at the maximum speed in order to assure the connection of the differential pressure switch and, therefore, to check the correct operation of the fan/flue-gas-exhausting system.
  • the underpression in the combustion chamber is constantly monitored. If the vacuum value decreases under a pre-determined limit, the pressure switch P.D. gives no longer its consent and, therefore, the boiler is turned off.
  • thermostat on the burner assures that the boiler is always operating within the required emission limits and in full safety.
  • the burner as a function of its temperature, can stop the flame in case of an abnormal temperature rise due to a failure on the air or gas control system
  • Such thermostat is placed electrically in series to the already existing limit thermostat. An intervention of this thermostat, therefore, places the boiler in a status of involatile shutdown.
  • Fig. 5 also shows the block A.C.F. that check the presence of the flame and assures the safety functions by acting on the gas valve operating devices.
  • Fig. 6 shows the functional diagram of such system.
  • T(PTS) represents the value of sanitary (or ambient heating) temperature required and determined by potentiometer P1.
  • T(SS) represents the water temperature value detected by sensor S1.
  • the Value V(Fan) is also used as input of the block T that produces I(Mod), the modulator current value, according to a pre-determined curve correlating V(Fan) to I(mod) in order to maintain the air-gas ratio produced by the modulator with current I(mod) and to grant an optimum combustion while maintaining a steady thermal efficiency by varying loading conditions.
  • the current value I(mod) applied to the gas valve modulator produces the actual pressure P(gas) in the combustion chamber.

Claims (1)

  1. Système de réglage air / gaz de chaudières, comprenant : une chambre de combustion, possédant un brûleur (BURNER) ;
    un capteur (40, S1) pour capter la température de l'eau ;
    un potentiomètre (P1) pour fixer une température requise ;
    un ventilateur (36, FAN), dont la vitesse est commandée par une carte de commande à base de microprocesseur ;
    un pressostat analogique différentiel (PAD), fournissant un signal corrélé à la dépression dans ladite chambre de combustion ;
    un modulateur de gaz (41, MOD), commandé par ladite carte de commande à base de microprocesseur ;
    des premiers moyens de commande (PIDA, PIDB ; PID A), pour commander ladite vitesse dudit ventilateur (36, FAN) sur la base dudit signal de dépression, dans lequel lesdits premiers moyens de commande (PIDA, PIDB ; PID A) comprennent :
    un premier contrôleur PID (PIDA) pour calculer une vitesse de ventilateur requise en fonction d'une différence entre ladite température requise sélectionnée par ledit potentiomètre (P1) et ladite température de l'eau captée par ledit capteur (S1) ;
    et un second contrôleur PID (PIDB) pour contrôler ladite vitesse du ventilateur en fonction de ladite vitesse du ventilateur requise et de ledit signal de dépression ;
    des seconds moyens de commande (AIR / GAS RATIO) pour générer un courant en fonction dudit signal pour commander un dit modulateur de gaz de façon à obtenir un rapport air - gaz optimum ;
    caractérisé en ce qu'il comprend :
    des premiers moyens d'activation, configurés pour activer de manière sélective le démarrage dudit ventilateur (36, FAN) à condition que ledit signal de dépression soit plus petit qu'une valeur fixe avant le démarrage dudit ventilateur, pour activer de manière sélective ledit brûleur (BURNER), à condition que ledit signal soit plus grand que ladite valeur fixée plus une constante prédéterminée après le démarrage dudit ventilateur (36, FAN), et pour désactiver ledit brûleur (BURNER) si, en fonctionnement, le niveau de dépression diminue sous une limite prédéterminée ;
    un thermostat (BURN THERM), disposé sur ledit brûleur, et des seconds moyens d'activation (BURN THERM SAFETY CONTROL ; SAFETY CONTROL), reliés audit thermostat (BURN THERM) et audit brûleur (BURNER), pour activer de manière sélective ledit brûleur (BURNER), sur la base de la mesure de la température dudit thermostat (BURN THERM) ;
    et un autre thermostat de limite, disposé en série avec ledit thermostat (BURN THERM) dudit dispositif de sécurité.
EP00200749A 2000-03-03 2000-03-03 Système de commande pour chaudières Expired - Lifetime EP1130320B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP00200749A EP1130320B1 (fr) 2000-03-03 2000-03-03 Système de commande pour chaudières
DE60032725T DE60032725T2 (de) 2000-03-03 2000-03-03 Regelanlage für Kessel
AT00200749T ATE350625T1 (de) 2000-03-03 2000-03-03 Regelanlage für kessel
ES00200749T ES2277584T3 (es) 2000-03-03 2000-03-03 Sistema de regulacion para calderas.
CNB011109785A CN1185442C (zh) 2000-03-03 2001-03-05 锅炉的空气－气体调节系统
HK03104773.2A HK1053350B (zh) 2000-03-03 2003-07-04 鍋爐的空氣-氣體調節系統

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00200749A EP1130320B1 (fr) 2000-03-03 2000-03-03 Système de commande pour chaudières

Publications (2)

Publication Number Publication Date
EP1130320A1 EP1130320A1 (fr) 2001-09-05
EP1130320B1 true EP1130320B1 (fr) 2007-01-03

Family

ID=8171139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00200749A Expired - Lifetime EP1130320B1 (fr) 2000-03-03 2000-03-03 Système de commande pour chaudières

Country Status (6)

Country Link
EP (1) EP1130320B1 (fr)
CN (1) CN1185442C (fr)
AT (1) ATE350625T1 (fr)
DE (1) DE60032725T2 (fr)
ES (1) ES2277584T3 (fr)
HK (1) HK1053350B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1351019B1 (fr) * 2002-04-02 2013-07-17 Siemens Schweiz AG Procédé pour le contrôle du fonctionnement d'un système de régulation de brûleur pour appareil de chauffage
CN1332152C (zh) * 2003-04-11 2007-08-15 株式会社庆东纳碧安 使用空气压力传感器的空气比例式锅炉

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0359315A (ja) * 1989-07-28 1991-03-14 Yamatake Honeywell Co Ltd 燃焼装置の安全制御装置
NL9200825A (nl) * 1992-05-08 1993-12-01 Fasto Nefit Bv Ventilatorbesturing.
CN1159852A (zh) * 1994-08-31 1997-09-17 株式会社佳士达 有探测失常和失效功能的燃烧装置
ES2170360T3 (es) * 1997-10-17 2002-08-01 Riello Spa Sistema de regulacion combinada de gas y de aire para regular la combustion en calderas caldeadas por gas.

Also Published As

Publication number Publication date
CN1389680A (zh) 2003-01-08
HK1053350B (zh) 2005-07-08
EP1130320A1 (fr) 2001-09-05
CN1185442C (zh) 2005-01-19
HK1053350A1 (en) 2003-10-17
ES2277584T3 (es) 2007-07-16
DE60032725T2 (de) 2007-10-04
DE60032725D1 (de) 2007-02-15
ATE350625T1 (de) 2007-01-15

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