WO2013123616A1 - Procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité - Google Patents

Procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité Download PDF

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Publication number
WO2013123616A1
WO2013123616A1 PCT/CN2012/000228 CN2012000228W WO2013123616A1 WO 2013123616 A1 WO2013123616 A1 WO 2013123616A1 CN 2012000228 W CN2012000228 W CN 2012000228W WO 2013123616 A1 WO2013123616 A1 WO 2013123616A1
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WO
WIPO (PCT)
Prior art keywords
fire
coal
furnace
coke
boiler
Prior art date
Application number
PCT/CN2012/000228
Other languages
English (en)
Chinese (zh)
Inventor
匡仲平
Original Assignee
Kuang Zhongping
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 Kuang Zhongping filed Critical Kuang Zhongping
Priority to PCT/CN2012/000228 priority Critical patent/WO2013123616A1/fr
Publication of WO2013123616A1 publication Critical patent/WO2013123616A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/02—Control systems for steam boilers for steam boilers with natural convection circulation

Definitions

  • the heat transfer mode in the furnace of a coal-fired power station boiler is: In the open flame fire gas heat transfer mode, the heat energy is converted into radiant energy by electromagnetic wave transfer, and then the radiant energy is converted into heat energy.
  • the upper outer water wall of a furnace wall ⁇ heat conduction
  • the inner water wall of a furnace wall convection heat transfer
  • the upper part of the steam water mixture or superheated steam in a pot of water The furnace heat release is 95X or more.
  • the coal burns fast and the amount of coal is large; the gas circulation speed is fast, the contact time with the heated surface is short, and a large amount of heat is not transferred to the water wall and is quickly discharged; the excessive loss of coal powder loss causes the coal to be burned, and the fire layer is easily disturbed.
  • the heating surface of open flame fire gas radiation heat exchange is only hot water and steam and water mixture in the high temperature zone above 90 ° C in the upper water wall of the furnace wall. and the superheated steam, the water wall and the side wall of the furnace Celsius down to temperatures below 40 Q C pot of cold water zone, but not heat, greatly limits the heat transfer coefficient, and the rising steam boiler heat efficiencies.
  • the semi-coke red coke fire gas heat conduction in the hearth is combined with the natural convection cycle heat exchange of the hot and cold air flow of the boiler water, instead of the open flame fire gas heat exchange, the standard coal consumption rate of the unit unit is reduced by 85% (54g/KWh).
  • the young coal in combustion is pyrolyzed to form a semi-coke red coke fire under relatively closed conditions, and directly contacts the lower pot plate of the furnace wall; the negative pressure ventilation and oxygen support combustion, the hydrocarbon ions are continuously released under the action of hot pressing
  • the high-temperature heat of 2000 Q C above Celsius can only be transferred from the fire side through the lower side of the furnace wall to the cold pot water with a heat absorption performance below 40 ° C in the low temperature zone;
  • Generate rated pressure, driven steam turbine driven generator rotor to generate electricity.
  • K semi-coke red coke has high calorific value, good combustion performance, low volatile content (5%-10%), smokeless, short flame, high temperature, good slag fluidity, good combustion effect, wide adaptability... ...
  • the temperature of the semi-coke red coke fire gas directly contacting the heated surface is higher than the temperature of the open flame of the open flame gas, which inevitably increases the thermal conductivity.
  • the burning time of the semi-coke red coke fire can be as long as ten hours, which is hundreds of times of the flame of the open flame (number of bills to several minutes).
  • the corresponding coal injection interval, coal injection, and coal consumption are naturally drastically reduced.
  • furnace wall pot plate 20 steel and cold pot water thermal conductivity far greater than the space radiation heat transfer coefficient, must increase the thermal conductivity.
  • the experiment proves: the cold air flow can not rise, the hot air flow can not be reduced, as long as the water surface temperature of the pot water reaches and maintains the boiling point above 100 ° C, the bottom pot water can only be in the cold water state below 40 ° C. It has a strong temperature difference with the semi-coke red coke fire gas, which inevitably increases the thermal conductivity.
  • the increase of steam temperature due to the negative pressure ventilation of the furnace is greater than the positive pressure air supply, and the medium and small opening negative pressure ventilation can ensure that the semi-coke red coke fire is fully oxygen-supported. And not to generate coke, it can also minimize the entry of cold air into the furnace and stimulate the wall of the furnace wall, resulting in lower boiler thermal efficiency and reduced evaporation.
  • the invention can reduce some water-cooled walls, burners, coal-saving devices and other supporting devices, greatly reducing boiler manufacturing costs and energy consumption.
  • [This] invention can greatly improve the efficiency of intermediate energy conversion (power generation, heat generation) of physical energy (coal), significantly reduce energy consumption per capita and unit GDP, and greatly reduce the pressure on resources and environment in some countries and regions. Due to the expansion of production capacity, the energy crisis, such as coal panic and panic, which seriously restricts economic development and development, is of great significance to the public interest and is urgently needed to be promoted and applied.
  • the granulated coal can be formed by ventilating and suppressing the flame of the open flame, covering the entire fire bed with a thickness of about 2 cm, and promoting the formation of the semi-coke red coke fire.
  • the hearth of the furnace is in the shape of a dome, which is high in the front, low in the middle, low in the middle and low in the middle, to facilitate the rise of the high temperature gas to guide the lower side of the furnace wall and the cold water in the pot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coke Industry (AREA)

Abstract

L'invention concerne un procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité se rapportant à l'amélioration du procédé de transfert de chaleur dans une chaudière à charbon de centrale électrique et une chaudière à charbon industrielle, par exemple une chaudière d'eau chaude à charbon. L'amélioration réside principalement dans l'utilisation de la conduction thermique d'un gaz de combustion de charbon semi-coké d'une sole de four combinée à un échange de chaleur par circulation par la convection naturelle du haut vers le bas de flux d'air froids/chauds de l'eau de chaudière, qui remplace l'échange de chaleur par rayonnement d'un gaz de four à réverbère en vue d'obtenir une conservation de l'énergie et une réduction de la consommation et des émissions dans une chaudière à charbon de centrale électrique et une chaudière à charbon industrielle, par exemple une chaudière d'eau chaude à charbon.
PCT/CN2012/000228 2012-02-22 2012-02-22 Procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité WO2013123616A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/000228 WO2013123616A1 (fr) 2012-02-22 2012-02-22 Procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/000228 WO2013123616A1 (fr) 2012-02-22 2012-02-22 Procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité

Publications (1)

Publication Number Publication Date
WO2013123616A1 true WO2013123616A1 (fr) 2013-08-29

Family

ID=49004901

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/000228 WO2013123616A1 (fr) 2012-02-22 2012-02-22 Procédé de réduction de la consommation de charbon standard d'une unité de génération d'électricité

Country Status (1)

Country Link
WO (1) WO2013123616A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816116A (ja) * 1981-07-22 1983-01-29 Yoshimine Kikan Kogyo Kk 不定形固型燃料用炉
FR2580382A1 (fr) * 1985-04-11 1986-10-17 Seccacier Chaudiere, notamment pour combustibles gras, comportant un organe d'etranglement de la masse de charbon en ignition sur la grille
DE3708020A1 (de) * 1987-03-12 1988-09-22 Michael Linder Rost fuer oefen, kessel und dergleichen
CN2118235U (zh) * 1991-12-27 1992-10-07 河南省周口市实用机械研究所 水、火管混合式家用蒸汽锅炉
CN2251099Y (zh) * 1995-11-02 1997-04-02 宁夏三新技术有限公司 小型锅炉的正、反烧燃烧装置
CN2294385Y (zh) * 1996-06-28 1998-10-14 吉林市锅炉厂 燃煤锅炉
JPH1163667A (ja) * 1997-08-08 1999-03-05 Mitsubishi Electric Corp 温水ボイラ
CN2534468Y (zh) * 2002-04-26 2003-02-05 卢长柱 旋流炉拱移动气化分级燃烧层燃炉

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816116A (ja) * 1981-07-22 1983-01-29 Yoshimine Kikan Kogyo Kk 不定形固型燃料用炉
FR2580382A1 (fr) * 1985-04-11 1986-10-17 Seccacier Chaudiere, notamment pour combustibles gras, comportant un organe d'etranglement de la masse de charbon en ignition sur la grille
DE3708020A1 (de) * 1987-03-12 1988-09-22 Michael Linder Rost fuer oefen, kessel und dergleichen
CN2118235U (zh) * 1991-12-27 1992-10-07 河南省周口市实用机械研究所 水、火管混合式家用蒸汽锅炉
CN2251099Y (zh) * 1995-11-02 1997-04-02 宁夏三新技术有限公司 小型锅炉的正、反烧燃烧装置
CN2294385Y (zh) * 1996-06-28 1998-10-14 吉林市锅炉厂 燃煤锅炉
JPH1163667A (ja) * 1997-08-08 1999-03-05 Mitsubishi Electric Corp 温水ボイラ
CN2534468Y (zh) * 2002-04-26 2003-02-05 卢长柱 旋流炉拱移动气化分级燃烧层燃炉

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