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1. 发明专利

CA1230269A FURNACE, BURNER AND METHOD FOR BURNING PULVERIZED COAL 未知
公开(公告)号：CA1230269A
公开(公告)日：1987-12-15
申请号：CA475270
申请日：1985-02-27
申请人： RILEY STOKER CORP
发明人： PENTERSON CRAIG A , LANGILLE DONALD S
IPC分类号： F23D1/00 , F23C5/08 , F23C7/02 , F23C99/00 , F23D1/02
摘要： FURNACE, BURNER AND METHOD FOR BURNING PULVERIZED COAL A furnace, a burner and a method for burning pulverized coal in a highly efficient and precisely controlled manner includes a tubular nozzle with a venturi flow control adjacent the outlet for directing a primary air and coal mixture into a primary combustion zone of the furnace for burning. A coal spreader is mounted in the divergent outlet section of the venturi and swirl vanes on the spreader divide and form the stream into plurality of fuel rich and fuel lean streams discharged into the combustion zone. A tubular conduit in coaxial alignment around the coal nozzle directs a swirling flow of secondary air into the combustion zone around the primary combustion zone and a plurality of tertiary air conduits spaced outwardly of the secondary air conduit are provide to introduce directionally controllable streams of tertiary air into the combustion zone. Each tertiary conduit includes an outlet port for discharging a stream of tertiary air and includes vane means move able to direct the stream of air into or away from the primary combustion zone for improved NOx control and combustion performance.

2. 发明专利

CA1186951A VENTURI BURNER NOZZLE FOR PULVERIZED COAL 未知
公开(公告)号：CA1186951A
公开(公告)日：1985-05-14
申请号：CA415934
申请日：1982-11-19
申请人： RILEY STOKER CORP
发明人： ITSE DANIEL C , PENTERSON CRAIG A
IPC分类号： F23D1/02 , F23C99/00 , F23D1/00
摘要： VENTURI BURNER NOZZLE FOR PULVERIZED COAL A new and improved nozzle for pulverized coal comprises a tubular nozzle having an inlet for receiving a primary, flowing stream of coal/air mixture and an outlet for discharging the stream into a furnace. A venturi-like, flow constrictor is coaxially disposed in the nozzle adjacent the outlet end with a divergent flow section terminating at a maximum diameter adjacent the outlet end of the nozzle in the furnace. A convergent venturi section is mounted upstream for concentrating the pulverized coal toward the central portion of the flowing stream and a flow spreader is mounted in coaxial alignment in the divergent flow section of the venturi and includes a maximum diameter, open end adjacent the outlet end of the nozzle . Wall surf aces of the spreader cooperate with those of the divergent flow section to form an annular pattern of discharge from the outlet end of the nozzle. A stream of secondary air is introduced to flow in a rapidly swirling annular pattern around the discharge from the nozzle, and by properly matching the secondary air velocity to that of the primary air/coal discharge velocity, the flame is increased in length and an outer, torroidal recirculation zone is formed around the outside of the coal/air discharge pattern. An inner, recirculation zone is created adjacent the large open end of the flow spreader inside the primary air/coal discharge pattern. A plurality of swirl vanes are provided between the outer surface of the spreader and the adjacent facing surface of the divergent flow section for imparting a swirling action for stabilizing the annular discharge pattern of the primary coal/air stream from the conduit into the furnace. This stabilized discharge pattern forms a wall or shield from the secondary air to provide a high temperature, reducing stagnant area adjacent the open end of the flow spreader. The inner and outer recirculation zones draw a portion of the hot combustion products back toward the open end of the flow spreader and volatiles in the coal are driven off rapidly in this high temperature, reducing atmosphere, minimizing the formation of NOX.

3. 发明专利

FR2011345A1 未知
公开(公告)号：FR2011345A1
公开(公告)日：1970-02-27
申请号：FR6920806
申请日：1969-06-20
申请人： RILEY STOKER CORP
IPC分类号： F22B37/28 , F22B37/00
摘要： 1,231,565. Steam separator. RILEY STOKER CORP. 10 June, 1969 [20 June, 1968], No. 29375/69. Heading B1T. [Also in Division F4] A steam-and-water drum 11 has a steam separator comprising a housing 22 with an inner tube 23 and an arcuate wall 24 separating the steam into two paths 25, 26 whose downstream ends have slots 27, 28 for discharge of water. Wet steam enters the drum through tubes 12 and passes first through a primary separator 19 and then into the inlets 33 of the housing 22. The circular paths 25, 26 cause the water to be flung outwardly of peel off plates 36, 27 leading to catchers 38 adjacent discharge slots 27, 28. The water collects in tray 31 and passes through pipe 32 into water space 15 connected to the boiler through downcomer tubes 13 and boiler feed pipe 14. A blowdown pipe 16 for removing sludge, and chemical feed pipe 17 for supplying corrosive and scale inhibitors, are provided. Dry steam leaves through outlet 35.

4. 发明专利

FR2007007A1 未知
公开(公告)号：FR2007007A1
公开(公告)日：1970-01-02
申请号：FR6913091
申请日：1969-04-24
申请人： RILEY STOKER CORP
IPC分类号： F22B21/08 , F22B33/00
摘要： 1,225,901. Water-tube steam generators. RILEY STOKER CORP. 2 April, 1969 [26 April, 1969], No. 17220/69. Heading F4A. A steam generator comprises a furnace section in the form of an elongate box within which combustion takes place and having walls constituted by assemblages of tubes through which fluid to be heated flows, a convection section also of elongate form and connecting means adapted to connect the convection and furnace sections in parallel juxtaposed upstanding relationship, the arrangement being that each section can be manufactured in isolation to a sufficient structural rigidity to permit transport to a location of use for assembly into a working unit. The steam generator shown in Fig. 1 comprises a furnace section 11 having its walls, floor and roof formed of welded tubes, and a convection section 12 comprising downcomer tubes 39 extending between upper and lower drums 37, 38 and a superheater 42. The two sections are transported separately to the site and are then joined together by welding or brazing rearwardly-directed feeder tubes 13 and steam-release tubes 14 of the section 11 to the forwardly-directed tubes 13 and 14 of the section 12. As shown in Fig. 3, the floor and roof of the section 11 have flat central portions 19, 25 and inclined side portion 21, 22, 26, 27, the headers 23 and 28 correspondingly having horizontal central portions and inclined end portions. The section 11 is of octagonal cross-section, with burners 15, 16 located on the angularly disposed sides adjacent the rear wall 17 so that their trajectories meet approximately at the centre of the cross-section.

5. 发明专利

CA753068A STEAM GENERATING UNIT 未知
公开(公告)号：CA753068A
公开(公告)日：1967-02-21
申请号：CA753068D
申请人： RILEY STOKER CORP
发明人： MILLER EARLE C , BLODGETT NORMAN S , KUHNER MAX H

6. 发明专利

CA711934A STEAM GENERATING UNIT 未知
公开(公告)号：CA711934A
公开(公告)日：1965-06-22
申请号：CA711934D
申请人： RILEY STOKER CORP
发明人： MILLER EARLE C

7. 发明专利

GB993146A Improvements relating to turbine power plants incorporating forced flow once throughsteam generating units 未知
公开(公告)号：GB993146A
公开(公告)日：1965-05-26
申请号：GB2306661
申请日：1961-06-26
申请人： RILEY STOKER CORP
IPC分类号： F01K7/22 , F22B29/06 , F22B35/10 , F22G7/14
摘要： 993,146. Forced flow steam boilers. RILEY STOKER CORPORATION. June 26, 1961 [June 27, 1960], No. 23066/61. Heading F4A. In a steam power plant having a forced-flow, once through boiler supplying steam to a high-pressure turbine and a low-pressure turbine of greater capacity than the H.P. turbine, separate feedwater lines connect to the inlets of the boiler economizer and evaporator and the outlet of the economizer has a normally closed valved connection to the inlet of the reheater, the valve being opened at peak load so that additional steam is generated for the low-pressure turbine. In the form shown the generator has a radiation chamber lined with evaporator tubes 28 and primary superheater tubes 29 and locates in its upper part pendant platens of secondary superheater tubes 30 and secondary reheater tubes 31. Gases from the chamber flow downwardly in a divided pass the sections of which respectively contain the low temperature section 19 of an economizer and a primary reheater 14. Two feedwater pumps 11 are connected through a valve 24 to a spray attemperator 23 between superheaters 14 and 30, and through a feed regulator 13 to the economizer inlet header 18 and to the evaporator inlet header 17, the latter connection being made through a pipe controlled by a throttling valve 16. The economizer which has a high-temperature section in the boiler furnace, discharges into a collecting header 21 whence a pipe 25 with a non-return valve 27 conveys the heated water to the evaporator inlet header 17 and through a branch pipe to an intermediate part of the evaporator 28. Steam from the evaporator discharges into a mixer 26 whence it flows through the superheaters 29, 30 and pipe 32 to the H.P. turbine 35. Partially expanded steam returns through the reheaters 14, 31 and flows to the L.P. turbine 36, the turbines driving an electric generator 37. The header 21 is connetted to a header in the pipe between the reheaters 14, 31 by a pipe controlled by a valve 22. In operation under normal load conditions the boiler performs as a conventional reheat unit, superheat temperature being controlled by spray attemperation at 23 according to indications of temperature in pipe 32 whilst reheat temperature is controlled by proportioning dampers controlling gas flow through the downpasses according to indications of temperature in the pipe 33. A controller 15 maintains the ratio of water supplied to the economizer and water supplied to the attemperator constant in the manner described in Specification 993,145 whilst steam output is controlled according to fuel input, the latter being controlled in response to signals received from a wattmeter 38. When a higher than normal load demand is encountered, the wattmeter 38 calls for an increased firing rate. The resulting increase in steam temperature causes an increase in feedwater flow and simultaneously the valve 16 is opened permitting a portion of the feedwater to flow directly to the evaporator. The economizer now acts as an evaporator and when steam generated therein reaches a predetermined temperature, the valve 22 opens admitting the steam to the reheater 31, the valve 22 acting as a reducing valve to give the appropriate pressure. When the valve 22 opens the pressure drop in the pipe 25 causes the non- return valve 27 to close. Thus at peak loads the reheater flow is increased by steam generated in the economizer.

8. 发明专利

GB975388A Steam generating unit 未知
公开(公告)号：GB975388A
公开(公告)日：1964-11-18
申请号：GB155363
申请日：1963-01-14
申请人： RILEY STOKER CORP
IPC分类号： F22B21/34 , F22G5/02
摘要： 975,388. Water tube steam boilers; regulating steam temperature. RILEY STOKER CORPORATION. Jan. 14, 1963 [Jan. 16, 1962], No. 1553/63. Heading F4A. In a steam generator having an upright furnace fired by burners disposed below abutments projecting from opposed furnace walls, one of the walls having a nose on its upper portion below a lateral gas offtake whilst the other wall supports a radiant superheater, the superheat temperature is controlled by adjusting the burners or the air supply thereto in response to final steam temperature to position the flame within the furnace near to or remote from the radiant superheater, the effect being accentuated by blowing secondary air through openings formed above the abutments, the amounts of air entering from each side being varied so as to assist in directing the flame either towards or away from the radiant superheater. In the form shown, the generator has a vertical tube-lined furnace 19 divided by opposed abutments 21, 22 into a radiation chamber 24 and a lower high temperature cell 23 into which burners 25, 26 fire. Above the abutments are air openings 78, 81. A nose 27 is formed on the rear furnace wall 15 below a lateral offtake 28 which leads to two parallel downpasses 33, 34, the flows of gas through which are controlled by proportioning dampers 91, 95. Gases leave the boiler through an air heater 35 and stack 36. On the front wall 14 of the furnace is mounted a radiant superheater 47 which receives steam from a primary superheater disposed in the pass 34, the steam then flowing through a pendent superheater 49 and outlet header 51 to a turbine. Steam to be reheated flows through a primary reheater disposed in the pass 33 and a pendent reheater 53 to return to the turbine through an outlet header 54. The headers 51, 54 contain respective temperature pick-offs 72, 71, which transmit signals representative of superheat and reheat temperature to a controller 68. At high loads when the superheat temperature would otherwise tend to rise above the desired value, the controller increases the air flow to the burner 25 and that from the openings 78 whilst decreasing the flow from the openings 81. The unbalanced air injection to the burners serves to deflect the stream of hot gases away from the superheater 47, the effect being accentuated by the additional air injected at 78. This lowers the gas temperature as it enters the lateral pass by causing the stream to take a long path through the chamber 19. At low loads; the burner 26 and the openings 81 receive the major portion of air, thus deflecting the gases towards the superheater 47 and shortening their flow path in the chamber thus maintaining the correct superheat temperature. Instead of varying the proportions of the air passing to the burners to control flame placement in the furnace 24 the burners may have intertube vanes which are adjusted relative to one another to produce the same effect. Temperature correcting adjustments are simultaneously made to the dampers 91, 95 and to the rate of water injection to a interstage desuperheater 105. Depending on the load on the boiler the controller 68 also varies the proportion of air passing to the burners to that passing to the openings 78, 81 so that at low load the burner air proportion is increased whilst at high load the air flow to the openings is increased. The formation of nitrous oxide at high loads is thereby minimized whilst the air injection completely oxidizes any nitrous oxide formed.

9. 发明专利

GB967816A Burner 未知
公开(公告)号：GB967816A
公开(公告)日：1964-08-26
申请号：GB3192263
申请日：1963-08-13
申请人： RILEY STOKER CORP
IPC分类号： F23C1/02 , F23D17/00
摘要： 967,816. Burners. RILEY STOKER CORPORATION. Aug. 13, 1963 [Aug. 16, 1962], No. 31922/63. Heading F4T. A burner for the furnace of a steam generator comprises a main opening 22 through which fuel and air are admitted to the furnace, auxiliary openings 23, 24 through which air is admitted to the furnace and control means for pivoting dampers 31, 32 in the auxiliary openings to maintain the velocity of air through the main opening 22 below a predetermined value. The dampers 31, 32 are connected by a linkage 33 to an hydraulic cylinder 34 supplied with pressure oil in either direction through conduits 47, 48 from a main control 46 actuated by the drop in air pressure through the burner as determined by a conduit 44 extending into the furnace and a conduit 45 extending into a duct 43 supplying air from a fan and heater to a plenum chamber 17. An adjustable damper 40 disposed downstream of the conduit 45 controls the flow of air to the burner in accordance with the amount of fuel supplied. Further dampers 27, 28, 29 are mounted in the main and auxiliary openings 22, 23, 24 and are angularly adjusted by hand wheels 35, 38. A mixture of air and oil, pulverized coal or gas is provided by a gun 25 resting in a perforated plate in the main opening 22. The gun shown in Fig. 5 is for gas and comprises an apertured nose having an outer conical surface and an inner cup-shaped concave surface. Three burners as described are mounted in three side-by-side openings formed in the furnace by bent water-wall tubes 12. An ignition gun 39 extends into the main opening 22 of the middle burner. Specifications 765,298, 778,320 and U.S.A. Specification 2,947,289 are referred to.

10. 发明专利

CA679929A STEAM GENERATING UNIT 未知
公开(公告)号：CA679929A
公开(公告)日：1964-02-11
申请号：CA679929D
申请人： RILEY STOKER CORP
发明人： OPLADEN HEINZ B

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