GB988327A - Improvements in pulverized-fuel firing arrangements for furnaces - Google Patents

Improvements in pulverized-fuel firing arrangements for furnaces

Info

Publication number
GB988327A
GB988327A GB34816/61A GB3481661A GB988327A GB 988327 A GB988327 A GB 988327A GB 34816/61 A GB34816/61 A GB 34816/61A GB 3481661 A GB3481661 A GB 3481661A GB 988327 A GB988327 A GB 988327A
Authority
GB
United Kingdom
Prior art keywords
air
duct
primary air
fuel
heater
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
Application number
GB34816/61A
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.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox 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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Publication of GB988327A publication Critical patent/GB988327A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • 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
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/04—Arrangements of recuperators
    • 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
    • F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
    • 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 
    • F23C2700/00—Special arrangements for combustion apparatus using fluent fuel
    • F23C2700/06—Combustion apparatus using pulverized fuel
    • F23C2700/063—Arrangements for igniting, flame-guiding, air supply in
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

988,327. Pulverulent-fuel firing systems. BABCOCK & WILCOX CO. Sept. 28, 1961 [Sept. 30, 1960], No. 34816/61. Heading F4B. In a pulverized fuel firing arrangement for a furnace in which pre-heated primary air is passed through pulverizing means to entrain fuel the primary and secondary air are heated in parallel combustion gas paths and means are provided for controlling the temperature of the primary air by mixing therewith relatively low temperature primary air prior to the entrainment of fuel. Means are also provided for controlling the flow of combustion gas through said air heating means to regulate the temperature of said gas downstream of the heating means. As shown in Fig. 4 four fans 40 supply primary air through pipes 46 to a common duct 41 whence fans 15 supply it to a primary air heater 16 which has a by-pass duet 54. The outlets from the heater 16 and duct 54 lead to a hot air duct 14 and cold air duct 17 respectively which supply a plurality of pulverizers 13 with selected proportions of hot and cold primary air. Secondary air is also supplied by the fans 40 through rotary regenerative heaters 18 having by-pass ducts 42. The primary air/fuel mixture is supplied from the pulverizers 13 to burners 12 at opposite walls of the furnace 10 of a vapour generating, superheating and reheating unit (Fig. 1) and secondary air to a duct 70 enclosing the burners. The primary air heater 16 comprises vertical tubes 31 which receive combustion gases from a plenum chamber 21 through a duct 27. Further ducts 20 (Fig. 3) lead from the chamber 21 in parallel with duct 27 to the rotary regenerative heaters 18, the ducts 20 containing economizer tubing 30. Combustion gases flow downwardly through one half of the tubes 31 in the air heater 16, through a chamber 34 beneath the heater, 'upwardly through the remaining tubes 31 and are discharged through a duct 37. The flow of combustion gas is regulated by means of a damper 36 in the chamber 34 in accordance with the mean of the gas outlet and air inlet temperatures as sensed by thermostats 63 and 61 respectively (Fig. 1). The signals from the thermostats are passed to a relay 62 and a device 64 controlling the damper 34. The proportions of hot and cold primary air supplied to each of the pulverizers 13 from the ducts 14 and 17 respectively are regulated by means of a control device 60 which senses the temperature at the outlet of the pulverizer and positions dampers 56 and 57 accordingly. A total primary air flow control 58 is regulated in accordance with the fuel supply to each pulverizer.
GB34816/61A 1960-09-30 1961-09-28 Improvements in pulverized-fuel firing arrangements for furnaces Expired GB988327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60267A US3117538A (en) 1960-09-30 1960-09-30 Method of and apparatus for air temperature regulation

Publications (1)

Publication Number Publication Date
GB988327A true GB988327A (en) 1965-04-07

Family

ID=22028428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34816/61A Expired GB988327A (en) 1960-09-30 1961-09-28 Improvements in pulverized-fuel firing arrangements for furnaces

Country Status (2)

Country Link
US (1) US3117538A (en)
GB (1) GB988327A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273520A (en) * 1964-12-29 1966-09-20 Combustion Eng Method and apparatus for air temperature regulation
US3274961A (en) * 1964-12-29 1966-09-27 Combustion Eng System for heating air and drying fuel
US4223640A (en) * 1978-12-21 1980-09-23 The Babcock & Wilcox Company Fuel firing
DE102008030650B4 (en) * 2008-06-27 2011-06-16 PROMECON Prozeß- und Meßtechnik Conrads GmbH Apparatus and method for controlling the fuel-to-air ratio of pulverized coal in a coal fired power plant
KR101967830B1 (en) * 2011-07-13 2019-04-10 프로메콘 프로쩨쓰-운트 메쓰테크닉 콘라즈 게엠베하 Device and method for controlling the fuel-air ratio in the combustion of ground coal in a firing system of a coal-fired power station
WO2022141015A1 (en) * 2020-12-29 2022-07-07 苏州西热节能环保技术有限公司 Steam soot blowing apparatus, rotary air preheater, and steam jet parameter design method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1941365A (en) * 1931-09-22 1933-12-26 Int Comb Eng Corp Art of heat transfer
US2230799A (en) * 1936-05-14 1941-02-04 James C Hobbs Combustion system
US2321129A (en) * 1941-05-27 1943-06-08 Air Preheater Air preheater control
US2655138A (en) * 1948-11-29 1953-10-13 Kennedy Van Saun Mfg & Eng Air heater mounted in the convection section of furnaces

Also Published As

Publication number Publication date
US3117538A (en) 1964-01-14

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