CN205447722U - High temperature gasification combined combustion system - Google Patents
High temperature gasification combined combustion system Download PDFInfo
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- CN205447722U CN205447722U CN201521134664.3U CN201521134664U CN205447722U CN 205447722 U CN205447722 U CN 205447722U CN 201521134664 U CN201521134664 U CN 201521134664U CN 205447722 U CN205447722 U CN 205447722U
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Abstract
The utility model discloses a high temperature gasification combined combustion system, include: steam boiler, flue gas pipeline, coal scuttle, first heat exchanger and at least one coal powder gasification flare assembly. In furnace was located to first heat exchanger, its cool air input linked to each other with first fan. Coal powder gasification flare assembly on locating boiler body's lateral wall combustion gun and locate boiler body's the gasification section of thick bamboo with one side with combustion gun with mating, a gasification section of thick bamboo is including hot coal powder entry, at least one gasifying agent inlet and coal gas export. Wherein, at least one gasifying agent inlet passes through the hot -air export intercommunication of hot air pipe line and first heat exchanger, and the coal gas export communicates with combustion gun. In addition, this system still includes conveyer belt, coal breakage pipe and coal breakage branch pipe, the one end and the coal breakage pipe intercommunication of coal breakage branch pipe, and the other end of coal breakage branch pipe and the coal cinder of cornmill entry intercommunication, the discharge of cornmill passes through the hot coal powder entry of buggy pipeline connection to a gasification section of thick bamboo.
Description
Technical field
This utility model relates to a kind of boiler plant, particularly to a kind of steam boiler.
Background technology
Steam boiler is the Industrial Boiler that water is heated into high-temperature steam.Steam boiler can be divided into electricity steam boiler, oil-fired steam boiler, gas-steam boiler, coal-fired steam boiler etc. several according to fuel；Vertical steam boiler and horizontal steam boiler can be divided into according to structure；Large, medium and small type steam boiler can be divided into according to scale.
Coal-fired steam boiler is using coal cinder as fuel, and operating cost is low, but the thermal efficiency is the highest.Gas-steam boiler generally uses natural gas, coal gas, liquefied petroleum gas as fuel, and the thermal efficiency is high, but operating cost is the highest.Prior art is also developed the various steam boiler carrying gas gasification stove, but builds and safeguard that gas gasification stove also will increase the cost of system.
A kind of high-efficiency pulverized coal gasification as disclosed in Chinese patent discloses No. 102818247A and composite combustion with powdered coal steam boiler, including aerator, Pulverized Coal Bin, power transportation pipe, combustor, vaporizer, burner hearth, horizontal flue, steam superheater, tail vertical well, boiler pillar, aerator connects Pulverized Coal Bin, and connecting vaporizer by power transportation pipe, burner connects vaporizer；Vaporizer, burner hearth, horizontal flue, tail vertical well are sequentially connected with, and are arranged on boiler pillar formation ∏ type；It is arranged above unburned band in burner hearth and vaporizer junction, burner hearth bottom is provided with jet wind entrance, secondary wind entrance, tertiary air entrance is set in unburned band exit；Steam superheater is arranged in horizontal flue；Economizer and air preheater it is provided with in tail vertical well.But, the raw material that the gasification of this high-efficiency pulverized coal and composite combustion with powdered coal steam boiler use is coal dust, and operating cost is the highest, and may not apply to traditional chain-grate type coal-fired steam boiler.
And for example Chinese patent discloses the steam boiler of No. 104864379A a kind of partial gasification burning realizing coal disclosed, including traveling-grate stoker and boiler body, boiler body is positioned at chain fire-gate surface, chain fire-gate lower section is provided with multiple air compartment, multiple air compartments are sequentially arranged along chain fire-gate direction of transfer, and multiple air compartment is positioned at the underface of burner hearth of boiler body, wherein it is provided with steam jet on the air compartment of head end, hogging it is additionally provided with in burner hearth, hogging will be divided into anterior burner hearth and rear portion burner hearth before and after burner hearth, anterior burner hearth is positioned at the surface of the air compartment of head end, rear portion burner hearth is positioned at the surface of remaining air compartment.But, the steam boiler of this partial gasification burning that can realize coal is to make high temperature coal cinder partial gasification generate water gas by supply water vapour at fire grate, the gasification efficiency of this method is the highest, and it needs to arrange multiple air compartment and controls the air intake of different stove section and make system reform cost raise.
Therefore it provides a kind of can reduce operating cost, improve the thermal efficiency coal-fired steam boiler become urgent problem in the industry.
Summary of the invention
The purpose of this utility model is to provide a kind of high-temperature gasification compound combustion system, and it can use coal cinder to reduce system operation cost as raw material, improves boiler thermal output in combination with high-temperature gasification burning.
According to scheme of the present utility model, a kind of high-temperature gasification compound combustion system is provided, including steam boiler, steam boiler includes boiler body, the burner hearth being located in boiler body, is located at the traveling-grate stoker of burner hearth bottom, is located at the first exhanst gas outlet of the end wall of boiler body and is located at the warm water entrance at top and the steam (vapor) outlet of boiler body；Flue, the first exhanst gas outlet of boiler body is communicated to chimney by flue；And coal bunker, another end wall of coal bunker adjacent pot furnace body is arranged.Wherein, high-temperature gasification compound combustion system farther includes: First Heat Exchanger, and First Heat Exchanger is located in burner hearth and includes that cool air inlet and hot air outlet, cool air inlet and the first blower fan are connected；At least one coal dust gasification fuel assembly, at least one coal dust gasification fuel assembly includes the combustion gun being located on the sidewall of boiler body and is matingly located at the gasification pot of the same side of boiler body with combustion gun, gasification pot includes hot coal powder entrance, at least one gasification agent inlet and gas exit, wherein, at least one gasification agent inlet is connected with the hot air outlet of First Heat Exchanger by hot-air pipeline, and gas exit connects with combustion gun；And, it is located at above coal bunker for carrying the conveyer belt of coal, the coal spout that the end of conveyer belt is connected to coal bunker and coal breakage arm in coal bunker, one end of coal breakage arm connects with coal spout, the other end of coal breakage arm connects with the coal cinder entrance of flour mill, and the discharge of flour mill is connected to the hot coal powder entrance of gasification pot by coal dust pipeline.
In addition, also provide for a kind of high-temperature gasification compound combustion system, including steam boiler, steam boiler includes boiler body, the burner hearth being located in boiler body, is located at the bottom of burner hearth for coal cinder being delivered to the traveling-grate stoker of stove chamber inner combustion, being located at the first exhanst gas outlet of the end wall of boiler body and be located at the warm water entrance at top and the steam (vapor) outlet of boiler body.Flue, the first exhanst gas outlet of boiler body is communicated to chimney by flue.First Heat Exchanger, First Heat Exchanger is located in burner hearth and includes that cool air inlet and hot air outlet, cool air inlet and the first blower fan are connected to be delivered to by cold air in First Heat Exchanger and the high-temperature flue gas heat exchange outside First Heat Exchanger.At least one coal dust gasification fuel assembly, at least one coal dust gasification fuel assembly includes the combustion gun being located on the sidewall of boiler body and is matingly located at the gasification pot of the same side of boiler body with combustion gun, and gasification pot includes hot coal powder entrance, at least one gasification agent inlet and gas exit.Wherein, at least one gasification agent inlet connects to become coal gas, gas exit to connect with combustion gun with the gas injection that will generate to stove chamber inner combustion heat release coal dust gasification in the hot-air after preheating is delivered to gasification pot with the hot air outlet of First Heat Exchanger by hot-air pipeline.
Selectively, hot coal powder entrance is located at the upper end wall of gasification pot, and at least one gasification agent inlet is located at the sidewall of gasification pot adjacent to upper end wall, and gas exit is located at the sidewall of gasification pot adjacent to lower end wall.
Selectively, at least one gasification agent inlet in tangential direction is located at the sidewall of gasification pot and hot-air is rotated fully with coal dust in gasification pot mix generation coal gas.
Selectively, at least one gasification agent inlet includes least one set gasification agent inlet, and often group gasification agent inlet includes at least two gasification agent inlets being positioned on the same cross section of gasification pot.
Selectively, at least one gasification agent inlet can include at least two group gasification agent inlets being positioned on varying cross-section.
Wherein, the first exhanst gas outlet of boiler body is expelled to the flue-gas temperature of chimney and is about 180～250 degrees Celsius.The air temperature being delivered in First Heat Exchanger via the first blower fan is about 20～25 degrees Celsius.The hot air temperature carried through the hot air outlet of First Heat Exchanger is about 550～650 degrees Celsius.
Preferably, combustion gun includes being located at the gas entry of one end, is located at the flame export of the other end, is located at the combustion air inlet of tube wall and is located at the combustion-supporting jet pipe within combustion gun.One end of combustion-supporting jet pipe connects with combustion air inlet, and the other end of combustion-supporting jet pipe extends and endcapped to the direction of flame export, and the tube wall of combustion-supporting jet pipe is provided with some air jet orifices.
Selectively, this high-temperature gasification compound combustion system farther includes combustion air arm, one end of combustion air arm connects with the combustion air inlet of combustion gun, the other end of combustion air arm connects with hot-air pipeline to spray to inside combustion gun the part hot-air from First Heat Exchanger via the some air jet orifices on combustion-supporting jet pipe so that spray to stove chamber inner combustion heat release be vigorously mixed in three grades of gasification gases the coal dust of residual from coal gas and the hot-air of gasification pot after.
Preferably, First Heat Exchanger include heat exchanger shell, at least two intercommunicating pores being located in heat exchanger shell and by the dividing plate being divided into inlet plenum and Heat Room inside heat exchanger shell, be formed on dividing plate and respectively around each intercommunicating pore from dividing plate at least two air lances extended in Heat Room.Wherein, cool air inlet is located on the locular wall of inlet plenum, hot air outlet is located on the locular wall of Heat Room, some air jet orifices are set on the endcapped of each air lance and tube wall, the cold air from cool air inlet is made to respectively enter at least two air lances by least two intercommunicating pores in inlet plenum and spray to heat exchange in Heat Room via some air jet orifices, through being flowed out First Heat Exchanger by hot air outlet after air heat-exchange.
Selectively, this high-temperature gasification compound combustion system farther includes the coal bunker for supplying coal cinder on traveling-grate stoker that another end wall of at least one chain driving wheel, at least one chain driven pulley and adjacent pot furnace body is arranged.Traveling-grate stoker is arranged to ring-type around at least one chain driving wheel and at least one chain driven pulley so that traveling-grate stoker is rotated by delivering to stove chamber inner combustion heat release the coal cinder from coal bunker at least one chain driving wheel.
Selectively, this high-temperature gasification compound combustion system farther includes to be located at above coal bunker for carrying the conveyer belt of coal, the coal spout that the end of conveyer belt is connected to coal bunker and coal breakage arm in coal bunker.One end of coal breakage arm connects with coal spout, and the other end of coal breakage arm connects with the coal cinder entrance of flour mill, to make coal dust in coal cinder is delivered to flour mill.
Preferably, this high-temperature gasification compound combustion system farther includes blender, and blender includes cold coal powder entrance, smoke inlet and mixed powder outlet, and cold coal powder entrance is connected with the discharge of flour mill by coal dust pipeline.And it is further provided with the second exhanst gas outlet connected with burner hearth on boiler body, second exhanst gas outlet connects to mix with the coal dust from flour mill in the high-temperature flue gas in burner hearth is delivered to blender with the smoke inlet of blender by smoke backflow pipeline, and making coal dust carry out one-level gasification, the outlet of the mixed powder of blender is connected with the hot coal powder entrance of gasification pot by coal dust pipeline in being delivered to gasification pot with the mixture by flue gas Yu coal dust and carries out two grades of gasifications.
Preferably, this high-temperature gasification compound combustion system further includes at the lower powder machine being located between flour mill and blender in coal dust pipeline, and lower powder machine includes tubular shell, the charging aperture being located at the upper side wall of tubular shell, is located at the discharging opening of the lower wall of tubular shell and is located at the rotation allotter within tubular shell.Wherein, rotate allotter and include the central pivotal axis arranged along the longitudinal axis of tubular shell and at least three panel extended to the inwall of tubular shell along the radial direction of tubular shell from central authorities' pivotal axis, at least three panel is constructed inside at least three feed bin lattice that can turn to discharging opening successively from charging aperture at tubular shell, thus avoid the flue gas in blender and coal dust to flow backwards to the direction of flour mill, enable to coal dust simultaneously and enter the stability of flow of blender.
Wherein, the high-temperature flue-gas being delivered in blender by the second exhanst gas outlet of burner hearth be about 800～1000 degrees Celsius, oxygen content be about 3%～5%.
Selectively, this high-temperature gasification compound combustion system can be configured to be provided only with the wherein any one-level in one-level gasification, two grades of gasifications, three grades of gasifications or two-stage.
Selectively, at least one coal dust gasification fuel assembly includes two the coal dust gasification fuel assemblies being relatively arranged on the two side of boiler body.
Selectively, this high-temperature gasification compound combustion system farther includes the waste heat boiler being located in flue, and waste heat boiler includes boiler furnace, the flue being formed in boiler furnace and the coil pipe evaporation being arranged in flue.The two ends of flue form smoke inlet and exhanst gas outlet respectively, the two ends of coil evaporator form water inlet and steam outlet respectively, and the smoke inlet of waste heat boiler connects with the first exhanst gas outlet of steam boiler, to be introduced in flue by middle temperature flue gas, the water flowed in coil evaporator is heated to be water vapour.
Selectively, this high-temperature gasification compound combustion system farther includes steam turbine generator, water vapour from the steam outlet of waste heat boiler enters steam turbine generator by pipeline and generates electricity, become, after water vapour generating acting, the water inlet that hot water is delivered to waste heat boiler from steam turbine generator and be again heated into water vapour, thus form power generation circuit.
Selectively, this high-temperature gasification compound combustion system arranges screw rod electromotor further in power generation circuit, and the hot water from steam turbine generator is first delivered to become warm water after screw rod electrical power generators does work, then the water inlet being delivered to waste heat boiler is heated into water vapour.
Selectively, this high-temperature gasification compound combustion system arranges the second heat exchanger further in power generation circuit, becomes cold water, then the water inlet being delivered to waste heat boiler is heated into water vapour after the warm water heat exchange in the second heat exchanger of screw rod electromotor.
Wherein, second heat exchanger includes first fluid stream and second fluid stream, warm water in power generation circuit flows through first fluid stream, flows through second fluid stream from the cold water of the first water pump and is delivered to the warm water entrance at top of boiler body by water pipe after the warm water heat exchange of first fluid stream.
Wherein, if the second heat exchanger includes shell, housing interior volume is divided into the most parallel first fluid stream and the median septum of second fluid stream and the dry heat pipe being located in median septum, wherein, the evaporation ends of heat pipe extends in first fluid stream, and the condensation end of heat pipe extends in second fluid stream.
Selectively, this high-temperature gasification compound combustion system farther includes the second water pump being located in power generation circuit.
Selectively, the second water pump can be located between heat exchanger and waste heat boiler.
Selectively, steam boiler farther include to be located at above burner hearth for the drum being filled with water and connect burner hearth and first exhanst gas outlet water in making flue gas and drum carries out the smoke-fire-tube of heat exchange.
Selectively, steam boiler can be the steam boiler of the disposable type can bought on market, preferably large-size horizontal steam boiler.
Selectively, the working medium in the heat pipe of the second heat exchanger can be the working medium such as the water or the ammonia that are applicable to 100 degrees centigrade operating modes.
Selectively, the second heat exchanger can also be surface-type heat exchanger, i.e. two kinds of fluids that temperature is different flow in by the separate space of wall, and heat conduction and fluid by wall carry out heat exchange between wall surface convection current, two kinds of fluids.
Wherein, the low-temperature flue gas temperature discharged from exhanst gas outlet after residual heat boiler for exchanging heat from the middle temperature flue gas of the first exhanst gas outlet of steam boiler is about 100～120 degrees Celsius.The steam temperature obtained after the water flowed in the coil evaporator of waste heat boiler and steam boiler middle temperature flue gas heat exchange is about 120～150 degrees Celsius, enters steam turbine generator through steam outlet by pipeline.Water vapour becomes temperature 95～the hot water of 100 degrees Celsius after entering steam turbine generator generating acting.The warm water temperature obtained through the acting of screw rod electrical power generators from the hot water of steam turbine generator generating is about 80～90 degrees Celsius.Hot water from screw rod electromotor through the first fluid stream of the second heat exchanger and becomes the cold water of temperature about 30～40 degrees Celsius and is delivered to be heated into water vapour in the water inlet of waste heat boiler enters waste heat boiler again after the cold water heat exchange of second fluid stream.The cold water temperature entering the second heat exchanger from the first water pump is about 20～25 degrees Celsius, flows through second fluid stream and becomes the warm water of 60～80 degrees Celsius after the warm water heat exchange of first fluid stream.
Alternately, coal dust can come from its exterior, i.e. native system can not use the relevant apparatus of powder process.
Alternately, this high-temperature gasification compound combustion system can not include power generation circuit.The most not including waste heat boiler, steam turbine generator, screw rod electromotor and the second heat exchanger, the first exhanst gas outlet of boiler body is directly connected to chimney by flue.
The beneficial effects of the utility model are: (1), due to prepared coal gas is mixed with from second exhanst gas outlet backflow flue gas, therefore the content of the carbon dioxide from the flue gas that steam boiler is discharged and oxynitride is the most relatively low, meets energy-saving and emission-reduction standard；(2), three grades of gasifying process of coal dust are used, specifically include: one-level (in advance) gasification carried out in blender, two grades (leading) gasification carried out in gasification pot and three grades (supplementing) gasification carried out in combustion gun, making coal dust gasification complete, the thermal efficiency is high；(3), it is easy on the basis of traditional chain-grate type steam boiler transform, and gasification, and combustion can carry out combined type burning together with coal cinder burning, reduces operating cost；(4), use power generation circuit, make full use of fume afterheat, energy-saving and emission-reduction；(5), for the gasifying agent of coal dust gasification from the self-produced high-temperature flue gas of system and high temperature air, not only low cost, and system stable operation is not affected.
Accompanying drawing explanation
Fig. 1 shows the organigram of this utility model high-temperature gasification compound combustion system.
Fig. 2 shows the connection diagram between steam boiler, combustion gun and the gasification pot that this utility model uses.
Fig. 3 shows the organigram of gasification pot and combustion gun.
Fig. 4 shows the internal structure schematic diagram of First Heat Exchanger of the present utility model.
Fig. 5 shows lower powder machine of the present utility model and the organigram of blender.
Detailed description of the invention
Refer to Fig. 1 and Fig. 2, according to a kind of embodiment of the present utility model, high-temperature gasification compound combustion system includes: steam boiler 100, First Heat Exchanger 200, combustion gun 310, gasification pot 320, flour mill 500, blender 600 and lower powder machine 700.
Wherein, steam boiler 100 include boiler body 110, the burner hearth (not shown) be located in boiler body 110, be located at burner hearth bottom for coal cinder 131 being delivered to the traveling-grate stoker 130 of stove chamber inner combustion, being located at the first exhanst gas outlet 140 of the end wall of boiler body 110 and be located at the warm water entrance 150 at top and the steam (vapor) outlet 160 of boiler body 110.First exhanst gas outlet 140 of boiler body 110 is communicated to chimney (not shown) by flue 400.
This high-temperature gasification compound combustion system also includes a spaced apart chain driving wheel (not shown) and two chain driven pulley (not shown).And the coal bunker 170 for supplying coal cinder on traveling-grate stoker 130 that another end wall farther including adjacent pot furnace body 110 is arranged.Traveling-grate stoker 130 is arranged to ring-type around chain driving wheel and two chain driven pulleys so that traveling-grate stoker 130 chain driving wheel be rotated by with by from coal bunker 170 coal cinder deliver to stove chamber inner combustion heat release.
First Heat Exchanger 200 is located in burner hearth and includes cool air inlet 210 and hot air outlet 220, and cool air inlet 210 is connected with the first blower fan 211 with the high-temperature flue gas heat exchange in cold air is delivered to First Heat Exchanger 200 and outside First Heat Exchanger 200.
As shown in Figure 4, First Heat Exchanger 200 include heat exchanger shell 230, be located at heat exchanger shell 230 in and be divided into inlet plenum 240 and Heat Room 250 by internal for heat exchanger shell 230 dividing plate 260, three intercommunicating pores 261 being formed on dividing plate 260 and respectively around each intercommunicating pore 261 from dividing plate 260 to three air lances 270 extended in Heat Room 250.Wherein, cool air inlet 210 is located on the locular wall of inlet plenum 240, hot air outlet 220 is located on the locular wall of Heat Room 250, some air jet orifices 271 are set on the endcapped of each air lance 270 and tube wall, the cold air from cool air inlet 210 is made to respectively enter three air lances 270 by three intercommunicating pores 261 and spray heat exchange to Heat Room 250 via some air jet orifices 271 in inlet plenum 240, through being flowed out First Heat Exchanger 200 by hot air outlet 220 after air heat-exchange.
As shown in Figures 2 and 3, the combustion gun 310 and the gasification pot 320 that are positioned at boiler body 110 the same side constitute a coal dust gasification fuel assembly.In this non-limiting embodiment, the both sides of boiler body 110 are respectively provided with a coal dust gasification fuel assembly.Wherein, gasification pot 320 includes hot coal powder entrance 321, gasification agent inlet 322 and gas exit 323.Wherein, gasification agent inlet 322 connects with the hot air outlet 220 of First Heat Exchanger 100 to become coal gas, gas exit 323 to connect with combustion gun 310 with the gas injection that will generate to stove chamber inner combustion heat release coal dust gasification in the hot-air after preheating is delivered to gasification pot 320 by hot-air pipeline 380.
Hot coal powder entrance 321 is located at the upper end wall of gasification pot 320, and gasification agent inlet 322 is located at the sidewall of gasification pot 320 adjacent to upper end wall, and gas exit 323 is located at the sidewall of gasification pot 320 adjacent to lower end wall.Gasification agent inlet 322 in tangential direction is located at the sidewall of gasification pot 320 and hot-air is rotated fully with coal dust in gasification pot 320 mix generation coal gas.
As shown in Figure 3, combustion gun 310 includes being located at the gas entry 311 of one end, is located at the flame export 312 of the other end, is located at the combustion air inlet 313 of tube wall and is located at the combustion-supporting jet pipe 314 within combustion gun 310, one end of combustion-supporting jet pipe 314 connects with combustion air inlet 313, the other end of combustion-supporting jet pipe 314 extends and endcapped to the direction of flame export 312, and the tube wall of combustion-supporting jet pipe 314 is provided with some air jet orifices 3145.
Each coal dust gasification fuel assembly also includes combustion air arm 390, one end of combustion air arm 390 connects with the combustion air inlet 313 of combustion gun 310, the other end of combustion air arm 390 connects with hot-air pipeline 380 to spray to combustion gun 310 internal by the part hot-air from First Heat Exchanger 200 via the some air jet orifices 3145 on combustion-supporting jet pipe 314 so that spray to stove chamber inner combustion heat release be vigorously mixed in gasification gas the coal dust of residual from coal gas and the hot-air of gasification pot 320 after.
Additionally, this high-temperature gasification compound combustion system also includes being located at above coal bunker 170 for carrying the conveyer belt 171 of coal, the coal spout 191 that the end of conveyer belt 171 is connected to coal bunker 170 and coal breakage arm 192 in coal bunker 170.One end of coal breakage arm 192 connects with coal spout 191, and the other end of coal breakage arm 192 connects with the coal cinder entrance 510 of flour mill 500, to make coal dust in coal is delivered to flour mill 500.
Blender 600 includes cold coal powder entrance 610, smoke inlet 620 and mixed powder outlet 630.Cold coal powder entrance 610 is connected with the discharge 520 of flour mill 500 by coal dust pipeline (non-label), and boiler body 110 is provided with the second exhanst gas outlet 180 connected with burner hearth, second exhanst gas outlet 180 connects with the smoke inlet 620 of blender 600 to mix with the coal dust from flour mill 500 in the high-temperature flue gas in burner hearth is delivered to blender 600 by smoke backflow pipeline (non-label), and coal dust is gasified in advance, blender 600 mixed powder outlet 630 by coal dust pipeline (non-label) connect with the hot coal powder entrance 321 of gasification pot 320 be delivered to gasification pot 320 with the mixture by flue gas with coal dust in gasify.
Lower powder machine 700 is located in the coal dust pipeline between flour mill 500 and blender 600, as it is shown in figure 5, lower powder machine 700 includes tubular shell 710, the charging aperture 711 being located at the upper side wall of tubular shell 710, is located at the discharging opening 712 of the lower wall of tubular shell 710 and is located at the rotation allotter within tubular shell 710.Rotate the central pivotal axis 721 that allotter includes arranging and four panels 722 extended along the radial direction of tubular shell 710 to the inwall of tubular shell 710 from central authorities' pivotal axis 721 along tubular shell 710 axis, four panels 722 are at four feed bin lattice 730 of tubular shell 710 Inner Constitution, each feed bin lattice 730 can turn to discharging opening 712 from charging aperture 711 successively, thus avoid the flue gas in blender 600 and coal dust to flow backwards to the direction of flour mill 500, enable to coal dust simultaneously and enter the stability of flow of blender 600.
Although figure 1 illustrates waste heat boiler 800, steam turbine generator 900, screw rod electromotor 1000 and the second heat exchanger 1100, but according to a kind of non-limiting embodiments of the present utility model, can not include that these construct.Specifically, the flue gas from the first exhanst gas outlet 140 of steam boiler 100 is directly expelled to chimney by flue 400.
According to a kind of alternative embodiments of the present utility model, as it is shown in figure 1, farther include waste heat boiler 800, steam turbine generator 900, screw rod electromotor 1000 and the second heat exchanger 1100.
Waste heat boiler 800 includes boiler furnace, the flue being formed in boiler furnace and the coil evaporator being arranged in flue.The two ends of flue form smoke inlet 810 and exhanst gas outlet 820 respectively, and the two ends of coil evaporator form water inlet 830 and steam outlet 840 respectively.The smoke inlet 810 of waste heat boiler connects with the first exhanst gas outlet 140 of steam boiler 100, to be introduced in flue by middle temperature flue gas, the water flowed in coil evaporator is heated to be water vapour.
Water vapour from the steam outlet 840 of waste heat boiler 800 passes through to become hot water after pipeline enters steam turbine generator 900 generating acting, hot water becomes warm water after steam turbine generator 900 is delivered to screw rod electromotor 1000 generating acting, warm water from screw rod electromotor 1000 becomes cold water in the second heat exchanger 1100 after heat exchange, then the water inlet 830 being delivered to waste heat boiler 800 is heated into water vapour.
Wherein, second heat exchanger 1100 includes first fluid stream and second fluid stream, warm water in power generation circuit flows through first fluid stream, flows through second fluid stream from the cold water of the first water pump 1101 and is delivered to the warm water entrance 150 at top of boiler body 100 by water pipe after the warm water heat exchange of first fluid stream.
As another kind of alternative embodiments, this high-temperature gasification compound combustion system can not include lower powder machine 700, and the discharge 520 of flour mill 500 is directly connected with the cold coal powder entrance 610 of blender 600 by coal dust pipeline.
As another alternative embodiments, in this high-temperature gasification compound combustion system, coal dust can come from its exterior, i.e. native system can not use the relevant apparatus of powder process, not including flour mill 500, lower powder machine 700, the second exhanst gas outlet 180 is connected with the smoke inlet 620 of blender 600 by smoke backflow pipeline and the high-temperature flue gas in burner hearth is delivered to blender 600 is interior to be mixed with the coal dust from its exterior.
As another alternative embodiments, combustion gun 310 does not includes the combustion air inlet 313 being located at tube wall and is located at the combustion-supporting jet pipe 314 within combustion gun 310, combustion gun 310 tube wall is provided with cool air inlet, and the coal gas from gasification pot 320 sprays to stove chamber inner combustion heat release after the coal dust of residual with cold air mixing gasifying coal gas.
In operation, the hot-air that the cold air of about 20 degrees Celsius is preheated to about 600 degrees Celsius through First Heat Exchanger 200 is delivered to gasification pot 320 and combustion gun 310 respectively as gasifying agent and combustion air.The coal dust that flour mill 500 prepares enters blender 600 after lower powder machine 700, coal dust is sufficiently mixed with the high-temperature flue gas from about 900 degrees Celsius of the second exhanst gas outlet 180 in blender 600, flue gas and coal dust intermixture are delivered to gasification pot 320 and gasify, and the coal gas that gasification generates sprays to stove chamber inner combustion heat release through combustion gun 310.
From the middle temperature flue gas about 200～300 degrees Celsius after heat exchange abundant in steam boiler 100 of the first exhanst gas outlet 140 after the further heat exchange of waste heat boiler 800, become about 100 degrees Celsius of low-temperature flue gas and be expelled to chimney through flue 400.
In power generation circuit, the cold water of about 30 degrees Celsius is heated into about 140 DEG C water steam at waste heat boiler 800 and enters turbogenerator 900 generating acting, water vapour becomes the hot water entrance screw rod electromotor 1000 of about 100 degrees Celsius and generates electricity further after generating electricity, the warm water becoming about 80 degrees Celsius after hot water generating enters the second heat exchanger 1100, and the cold water of warm water heat exchange one-tenth about 30 degrees Celsius reenters waste heat boiler 100 and heats.
Simultaneously, entering the second heat exchanger 1100 heat exchange from the cold water of about 20 degrees Celsius of the first water pump 1101 becomes the warm water of about 70 degrees Celsius to be entered the warm water entrance 150 of steam boiler 100 by water pipe, through being supplied to user by steam pipe line by steam (vapor) outlet 160 after being heated into water vapour in steam boiler 100.
Although described preferred implementation of the present utility model in detail at this, it is to be understood that this utility model is not limited to the concrete structure describing in detail here and illustrating, in the case of without departing from spirit and scope of the present utility model, may be effected by one skilled in the art other modification and variant.Additionally, the temperature of system or pressure and other parameters suitably can be chosen in scope disclosed in the utility model according to concrete application conditions.
Claims (8)
1. a high-temperature gasification compound combustion system, including:
Steam boiler, described steam boiler includes boiler body, the burner hearth being located in described boiler body, is located at the traveling-grate stoker of described burner hearth bottom, is located at the first exhanst gas outlet of the end wall of described boiler body and is located at the warm water entrance at top and the steam (vapor) outlet of described boiler body；
Flue, described first exhanst gas outlet of described boiler body is communicated to chimney by described flue；And
Coal bunker, described coal bunker is arranged adjacent to another end wall of described boiler body；
It is characterized in that, described high-temperature gasification compound combustion system farther includes:
First Heat Exchanger, described First Heat Exchanger is located in described burner hearth and includes that cool air inlet and hot air outlet, described cool air inlet and the first blower fan are connected；
At least one coal dust gasification fuel assembly, at least one coal dust gasification fuel assembly described includes the combustion gun being located on the sidewall of described boiler body and is matingly located at the gasification pot of the same side of described boiler body with described combustion gun, described gasification pot includes hot coal powder entrance, at least one gasification agent inlet and gas exit, wherein, at least one gasification agent inlet described is connected with the described hot air outlet of described First Heat Exchanger by hot-air pipeline, and described gas exit connects with described combustion gun；And
It is located at above described coal bunker for carrying the conveyer belt of coal, the coal spout that the end of described conveyer belt is connected to described coal bunker and coal breakage arm in described coal bunker, one end of described coal breakage arm connects with described coal spout, the other end of described coal breakage arm connects with the coal cinder entrance of flour mill, and the discharge of described flour mill is connected to the described hot coal powder entrance of described gasification pot by coal dust pipeline.
2. high-temperature gasification compound combustion system as claimed in claim 1, it is characterized in that, described hot coal powder entrance is located at the upper end wall of described gasification pot, at least one gasification agent inlet described is located at the sidewall of described gasification pot adjacent to upper end wall, and described gas exit is located at the sidewall of described gasification pot adjacent to lower end wall.
3. high-temperature gasification compound combustion system as claimed in claim 2, it is characterised in that at least one gasification agent inlet in tangential direction described is located at the sidewall of described gasification pot.
4. high-temperature gasification compound combustion system as claimed in claim 1, it is characterized in that, described combustion gun includes being located at the gas entry of one end, is located at the flame export of the other end, is located at the combustion air inlet of tube wall and is located at the combustion-supporting jet pipe within described combustion gun, one end of described combustion-supporting jet pipe connects with described combustion air inlet, the other end of described combustion-supporting jet pipe extends and endcapped to the direction of described flame export, and the tube wall of described combustion-supporting jet pipe is provided with some air jet orifices.
5. high-temperature gasification compound combustion system as claimed in claim 4, it is characterized in that, farther including combustion air arm, one end of described combustion air arm connects with the described combustion air inlet of described combustion gun, and the other end of described combustion air arm connects with described hot-air pipeline.
6. high-temperature gasification compound combustion system as claimed in claim 1, it is characterized in that, described First Heat Exchanger includes heat exchanger shell, it is located in described heat exchanger shell and the dividing plate of inlet plenum and Heat Room will be divided into inside described heat exchanger shell, at least two intercommunicating pores being formed on described dividing plate, and respectively around each intercommunicating pore from described dividing plate at least two air lances extended in described Heat Room, wherein, described cool air inlet is located on the locular wall of described inlet plenum, described hot air outlet is located on the locular wall of described Heat Room, some air jet orifices are set on the endcapped of each air lance and tube wall.
7. the high-temperature gasification compound combustion system as according to any one of claim 1～6, it is characterized in that, farther including at least one chain driving wheel and at least one chain driven pulley, described traveling-grate stoker is arranged to ring-type around at least one chain driving wheel described and at least one chain driven pulley described.
8. high-temperature gasification compound combustion system as claimed in claim 7, it is characterized in that, farther include blender, described blender includes cold coal powder entrance, smoke inlet and mixed powder outlet, described cold coal powder entrance is connected with the discharge of described flour mill by coal dust pipeline, and it is further provided with the second exhanst gas outlet connected with described burner hearth on described boiler body, described second exhanst gas outlet is connected with the described smoke inlet of described blender by smoke backflow pipeline, the described mixed powder outlet of described blender is connected with the described hot coal powder entrance of described gasification pot by coal dust pipeline.
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| CN201521134664.3U CN205447722U (en) | 2015-12-29 | 2015-12-29 | High temperature gasification combined combustion system |
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| CN201521134664.3U CN205447722U (en) | 2015-12-29 | 2015-12-29 | High temperature gasification combined combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485666A (en) * | 2015-12-29 | 2016-04-13 | 冯伟铭 | High-temperature gasification compound combustion system for coal-fired steam boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105485666A (en) * | 2015-12-29 | 2016-04-13 | 冯伟铭 | High-temperature gasification compound combustion system for coal-fired steam boiler |
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