CN105571337A - Energy-saving industrial furnace adopting biomass gasification combustion power generation system - Google Patents
Energy-saving industrial furnace adopting biomass gasification combustion power generation system Download PDFInfo
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- CN105571337A CN105571337A CN201610058314.6A CN201610058314A CN105571337A CN 105571337 A CN105571337 A CN 105571337A CN 201610058314 A CN201610058314 A CN 201610058314A CN 105571337 A CN105571337 A CN 105571337A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The invention discloses an energy-saving industrial furnace adopting a biomass gasification combustion power generation system. The energy-saving industrial furnace comprises a furnace body, at least four tempering-preventing nozzles, a flue gas pipeline, a first heat exchanger, a second heat exchanger, a turbine power generation device and a biomass gasifier, wherein the first heat exchanger and the second heat exchanger are sequentially arranged in the flue gas flowing direction of the flue gas pipeline. The biomass gasifier is provided with a water vapor inlet, a hot air inlet and a biomass gas outlet. The first heat exchanger is provided with a first flue gas flow passage and a first fluid flow passage, and an outlet of the first fluid flow passage is connected with the turbine power generation device and the water vapor inlet of the biomass gasifier through a water vapor pipeline. The second heat exchanger is provided with a second flue gas flow passage and a second fluid flow passage, and an outlet of the second fluid flow passage is connected with the hot air inlet of the biomass gasifier through a hot air pipeline. The biomass gas outlet of the biomass gasifier is connected with the at least four tempering-preventing nozzles through a biomass gas pipeline so that biomass gas can be injected into the furnace body to be combusted to release heat.
Description
Technical field
The present invention relates to a kind of Industrial Stoves, particularly relate to a kind of Industrial Stoves of biomass burning gas.
Background technology
In the face of increasingly serious environmental problem and energy crisis, energy-saving and emission-reduction are all being advocated energetically in the whole world.Especially for power consumption with pollute for all more serious Industrial Stoves related industry, how carrying out energy-saving and emission-reduction transformation, having become the factor that those skilled in the art must consider when designing this kind equipment.
For Industrial Stoves, it not only needs a large amount of fuel combustion to provide heat energy in use, and these fuel can discharge a large amount of toxic and harmfuls when burning in air, cause Air seriously polluted; In addition, the flue-gas temperature in industrial furnace smoke exit can reach 900 degrees centigrade usually, if be directly discharged in environment by these high-temperature flue gas, energy waste not only can be caused also to cause destruction to a certain degree to environment.
As No. 201420329574.9, Chinese patent discloses a kind of biological fuel gas Industrial Stoves combustion system with flue gas waste heat-recovering, it comprises plate type heat exchanger, kiln and burner, plate type heat exchanger inside is provided with exhaust gases passes and combustion air passage, one end of exhaust gases passes is communicated with kiln inside, the other end of exhaust gases passes is in communication with the outside, one end of combustion air passage is communicated with the inside of burner, the other end of combustion air passage is in communication with the outside, and burner is also connected with biomass gasification burning passage.But biological fuel gas Industrial Stoves combustion system does not disclose or advises the source of biomass gasification burning disclosed in this patent, the waste heat of discharging flue gas is not also utilized completely.
And for example No. 201420819512.6, Chinese patent discloses a kind of biomass gasification fired heating system for Industrial Stoves, comprising: kiln, is provided with exhanst gas outlet and combustion inlet; Pyrolysis apparatus, is provided with heat tunnel, pyrolysis gas outlet and material outlet, and heat tunnel entrance connects the exhanst gas outlet of kiln; The gasification furnace in inclusive reaction district, pyrolysis gas outlet passes to reaction zone by pipeline, and the material inlet of gasification furnace connects the material outlet of pyrolysis apparatus by pipeline, the gas outlet of gasification furnace passes to the combustion inlet of kiln; And heat exchanger, heat exchanger comprises the high temperature inlet, the low-temperature outlet that are interconnected, and the low-temperature inlet be interconnected, hot outlet, and high temperature inlet connects the gas vent of kiln, and hot outlet is passed in reaction zone by pipeline.But the gasification furnace in biomass gasification fired heating system disclosed in this patent also needs to utilize pyrolysis apparatus to provide material to originate, and this biomass gasification fired heating system does not disclose yet or advises how utilizing the flue gas of kiln to generate electricity.
Therefore, a kind of fume afterheat that can make full use of is provided can to generate electricity and the energy-saving industrial kiln that gasifying agent can be provided to originate for biomass gasifying furnace becomes urgent problem in the industry.
Summary of the invention
The object of this invention is to provide a kind of energy-saving industrial kiln adopting biomass gasification fired electricity generation system, its waste heat fully can recycling Industrial Stoves high-temperature flue gas generates electricity, can give again as biomass gasifying furnace provides gasifying agent to originate, utilize biomass gasifying furnace to heat for Industrial Stoves, realize recycling of energy.
To achieve these goals, the invention provides a kind of energy-saving industrial kiln adopting biomass gasification fired electricity generation system, comprising: kiln body of heater, in kiln body of heater, be provided with burner hearth; At least four anti-backfire nozzles, at least four anti-backfire nozzle pitch are arranged on the furnace wall, bottom of kiln body of heater, for combustion gas and combustion-supporting gas are ejected into the heat release of burner hearth combustion; And flue, so that the flue gas produced in burner hearth is expelled to chimney on the furnace wall, side that flue is connected to kiln body of heater; Wherein, First Heat Exchanger and the second heat exchanger for the making the flue gas in flue and different fluids carry out heat exchange respectively that adopt the energy-saving industrial kiln of biomass gasification fired electricity generation system also to comprise biomass gasification fired electricity generation system and arrange successively along the flow of flue gas direction of flue; Its biomass gasification fired electricity generation system comprises turbine generator and biomass gasifying furnace, and biomass gasifying furnace has the outlet of steam entry, hot air inlet and biological fuel gas; First Heat Exchanger has the first flue gas flow path and first fluid stream, and the outlet of first fluid stream is connected with the steam entry of turbine generator and biomass gasifying furnace successively by water vapour pipeline; Second heat exchanger has the second flue gas flow path and second fluid stream, and the outlet of second fluid stream is connected with the hot air inlet of biomass gasifying furnace by hot-air pipeline; The biological fuel gas outlet of biomass gasifying furnace is connected biological fuel gas to be injected into the heat release of kiln body of heater combustion by biomass fuel gas pipeline with at least four anti-backfire nozzles.
Preferably, hot-air pipeline also branch has hot-air to divide pipeline, and hot-air divides pipeline to be connected with biomass fuel gas pipeline and is provided with the first blender in junction to be mixed to form premix gas by from the part hot-air of the second heat exchanger and biological fuel gas.
Selectively, hot-air divides pipeline to be delivered to the first blender by 20 ~ 40% of hot-air total amount to be mixed to form premix gas with biological fuel gas, is preferably delivered to the first blender by 30% of hot-air total amount.
Preferably, flue is connected with the first smoke backflow pipeline and the second smoke backflow pipeline in the downstream of the outlet of the second flue gas flow path of the second heat exchanger, wherein, the first smoke backflow pipeline is connected with at least four anti-backfire nozzles and is used for combustion-supporting partial fume to be back at least four anti-backfire nozzle places; Second smoke backflow pipeline be connected with the second blender that hot-air pipeline is arranged using partial fume is back in the second blender be used for mixing with the hot-air from the second heat exchanger after be delivered to biomass gasifying furnace as gasifying agent.
Selectively, the first smoke backflow pipeline is back at least four anti-backfire nozzles and is used for combustion-supporting by 10 ~ 20% of amount of flue gas emission, be preferably back at least four anti-backfire nozzles by 15% of amount of flue gas emission.
Selectively, the second smoke backflow pipeline is back to the second blender and is used for mixing with the hot-air from the second heat exchanger by 10 ~ 20% of amount of flue gas emission, be preferably back to the second blender by 15% of amount of flue gas emission.
Preferably, each anti-backfire nozzle at least four anti-backfire nozzles comprises nozzle body, be located at the jet of nozzle body one end, be located at the hybrid chamber of nozzle body inside and be located at the other end of nozzle body and the air channel distributor be communicated with hybrid chamber, wherein, air channel distributor comprise arrange with one heart from inside to outside air channel, center, gaseous mixture air channel and flue gas air channel, gaseous mixture air channel is connected with biomass fuel gas pipeline, and air channel, center and flue gas air channel are connected with the first smoke backflow pipeline respectively.
Selectively, at least four anti-backfire nozzles can be more than five or five.
Preferably, each anti-backfire nozzle comprises the second rotational flow fan that contiguous hybrid chamber is arranged at the first rotational flow fan in gaseous mixture air channel and is arranged in flue gas air channel further.
Preferably, first blender or the second blender comprise blender body, be located at the first kind gas access of blender body one end, be located at the Equations of The Second Kind gas access of blender body side, be located at the gas mixing chamber of blender body interior and be located at the mixed gas outlet of the other end of blender body, wherein, in gas mixing chamber, contiguous mixed gas outlet is provided with rotary blade.
Preferably, biomass gasification fired electricity generation system also comprises screw rod TRT, the part water vapour flowed out from turbine generator is delivered to after screw rod TRT changes cold water into for generating via pipeline, then is delivered to the entrance of first fluid stream of First Heat Exchanger through pipeline.
Selectively, flow out 20 ~ 40% of water vapour total amount from turbine generator and be delivered to screw rod TRT for generating via pipeline, preferably flow out 30% of water vapour total amount from turbine generator and be delivered to screw rod TRT via pipeline.
Wherein, turbine generator can be the generator of general Steam Turbine Driven, and superheated steam enters expansion work in steam turbine, makes blade rotation and drive electrical generators generates electricity.
Selectively, screw rod TRT adopts screw expander generation technology, and its operation principle is the volumetric expansion by hot fluid in negative and positive screw rod conduit, promotes negative and positive screw rod and rotates round about, realize acting process thermal power transfer being become mechanical energy.
Wherein, the temperature flowing out water vapour from turbine generator is 100 ~ 115 degrees Celsius, and the cold water temperature flowed out from screw rod TRT is 55 ~ 65 degrees Celsius.
Preferably, the porch of the first fluid stream of First Heat Exchanger is provided with the first water pump for introducing first fluid in first fluid stream, and the porch of the second fluid stream of the second heat exchanger is provided with the first blower fan for introducing second fluid in second fluid stream.
Selectively, the first fluid in the first fluid stream of First Heat Exchanger is water, and the second fluid in the second fluid stream of the second heat exchanger is air.
Selectively, the second water pump is provided with cold water to be introduced the entrance of first fluid stream from the pipeline of the cold water of screw rod TRT outflow.
Selectively, the first smoke backflow pipeline is provided with the second blower fan and is used for combustion-supporting partial fume to be back at least four anti-backfire nozzle places.
Preferably, some first heat pipes that First Heat Exchanger comprises the first shell, the first housing interior volume is divided into the septum primum plate of reverse the first parallel flue gas flow path and first fluid stream and is located in septum primum plate, wherein, the evaporation ends of the first heat pipe extends in the first flue gas flow path, the condensation end of the first heat pipe extends in first fluid stream, the outer wall of the evaporation ends of the first heat pipe is evenly equipped with several the first fins for increasing heat exchange area.
Preferably, some second heat pipes that second heat exchanger comprises second housing, second housing inner space is divided into the septum secundum plate of reverse the second parallel flue gas flow path and second fluid stream and is located in septum secundum plate, wherein, the evaporation ends of the second heat pipe extends in the second flue gas flow path, the condensation end of the second heat pipe extends in second fluid stream, the evaporation ends of the second heat pipe and the outer wall of condensation end is evenly equipped with respectively several the second fins for increasing heat exchange area.
Wherein, be cooled to about 500 degrees Celsius after the high-temperature flue gas of about 900 degrees Celsius that burner hearth is discharged flows through First Heat Exchanger, then flow through after the second heat exchanger is cooled to about 150 degrees Celsius, flue gas is back at least four anti-backfire nozzles and the second blender more respectively.
Selectively, the working medium in the first heat pipe of First Heat Exchanger is the working medium such as Liquid Sodium or potassium being applicable to 1000 degrees centigrade operating modes.
Selectively, the working medium in the second heat pipe of the second heat exchanger is the working medium such as the naphthalene being applicable to 500 degrees centigrade operating modes.
Selectively, the temperature of carrying out the water vapour in the exit of the first fluid stream after heat exchange through First Heat Exchanger is 250 ~ 350 degrees Celsius, and the temperature of carrying out the hot-air in the exit of the second fluid stream after heat exchange through the second heat exchanger is 250 ~ 350 degrees Celsius.
Wherein, the oxygen content in the flue gas after the second heat exchanger process is about 6%, and the oxygen content of the hot-air after the second heat exchanger process is about 21%, and the oxygen content of the gasifying agent after the second blender process is about 15%.
The invention has the beneficial effects as follows: (1), to arrange successively along the flow of flue gas direction of flue for making the flue gas of flue and different fluids carry out the First Heat Exchanger of heat exchange respectively and the second heat exchanger makes the fume afterheat classification of flue be reclaimed by First Heat Exchanger and the second heat exchanger, substantially increasing heat recovery efficiency and effectively reducing exhaust emission simultaneously; (2), adopt First Heat Exchanger to carry out secondary recovery to high-temperature flue gas to utilize generating, substantially increase flue gas waste heat recovery rate; (3), First Heat Exchanger and the second heat exchanger preheating cold water and cold air respectively, cool water heating is delivered to biomass gasifying furnace as a kind of gasifying agent after becoming water vapour, become hot-air after cold air preheating and be delivered to biomass gasifying furnace as another kind of gasifying agent, be delivered to kiln after the biological fuel gas produced mixes with another strand of hot-air again to burn, achieve recycling of burner hearth high-temperature flue gas waste heat, reach the object of energy-saving and emission-reduction; (4), that the high-temperature flue gas that accounts for total amount about 15% is delivered to anti-backfire nozzle by the first smoke backflow pipeline is combustion-supporting, improves efficiency of combustion; (5), anti-backfire nozzle structure become flue gas and biological fuel gas are fully mixed, and adopt rotational flow fan strengthen rotate, mixed effect, further increase efficiency of combustion; (6) greatly reduce the content of the carbon dioxide in the final flue gas of kiln discharge, nitrogen oxide, effectively protect environment.
Accompanying drawing explanation
Fig. 1 shows the organigram of the energy-saving industrial kiln of the biomass gasification fired electricity generation system of employing of the present invention.
Fig. 2 shows the organigram of First Heat Exchanger of the present invention.
Fig. 3 shows the organigram of the second heat exchanger of the present invention.
Fig. 4 shows the organigram of the first blender of the present invention or the second blender.
Fig. 5 shows the organigram of anti-backfire nozzle of the present invention.
Detailed description of the invention
Please refer to Fig. 1, according to a kind of non-limiting embodiment of the present invention, the energy-saving industrial kiln of biomass gasification fired electricity generation system is adopted to comprise: kiln body of heater 100, four anti-backfire nozzles 120, flue 130, First Heat Exchanger 200, second heat exchanger 300, turbogenerator 400 and biomass gasifying furnace 500.
Wherein, burner hearth (not shown) is provided with in kiln body of heater 100, four anti-backfire nozzles 120 are disposed on the furnace wall, bottom of kiln body of heater 100, thus combustion gas and combustion-supporting gas can be ejected into the heat release of burner hearth combustion, so that the flue gas produced in burner hearth is expelled to chimney (not shown) on the furnace wall, side that flue 130 is connected to kiln body of heater 100.
Flow of flue gas direction along flue 130 is furnished with First Heat Exchanger 200 and the second heat exchanger 300 for making the flue gas in flue 130 and different fluids carry out heat exchange respectively successively.Be cooled to about 500 degrees Celsius after the high-temperature flue gas of about 900 degrees Celsius that discharge from burner hearth flows through First Heat Exchanger 200, then be cooled to about 150 degrees Celsius after flowing through the second heat exchanger 300.
As shown in Figure 2, the septum primum plate 240 that First Heat Exchanger 200 comprises the first shell 210, the first shell 210 inner space is divided into reverse parallel first fluid stream 220 and the first flue gas flow path 230 and some first heat pipes 250 be located in septum primum plate 240, wherein, the evaporation ends of the first heat pipe 250 extends in the first flue gas flow path 230, and the condensation end of the first heat pipe 250 extends in first fluid stream 220.Working medium in the heat pipe of First Heat Exchanger 200 is for being applicable to Liquid Sodium or the potassium of about 800 ~ 1200 degrees Celsius (such as 1000 degrees centigrade) operating modes, in order to improve heat exchange efficiency, the outer wall of the evaporation ends of the first heat pipe 250 is evenly equipped with several the first fins 251 for increasing heat exchange area.
As shown in Figure 3, second heat exchanger 300 comprises second housing 310, second housing 310 inner space is divided into the septum secundum plate 340 of reverse parallel second fluid stream 320 and the second flue gas flow path 330, and some second heat pipes 350 be located in septum secundum plate 340, wherein, the evaporation ends of the second heat pipe 350 extends in the second flue gas flow path 330, the condensation end of the second heat pipe 350 extends in second fluid stream 320, also for ease of raising heat exchange efficiency, the evaporation ends of the second heat pipe 350 and the outer wall of condensation end are evenly equipped with respectively several the second fins 351 for increasing heat exchange area.
In the non-limiting embodiment shown in Fig. 1, the entrance 221 of the first fluid stream 220 of First Heat Exchanger 200 is connected to by pipeline and is connected to the first blower fan F1 for carrying the air as second fluid in second fluid stream 320 for the entrance 321 supplemented in first fluid stream 200 as the second fluid stream 320 of the first water pump P 1, second heat exchanger 300 of the water of first fluid by pipeline.Thus, the first water pump P 1 and the first blower fan F1 is utilized to introduce cold water and cold air respectively in First Heat Exchanger 200 and the second heat exchanger 300.The outlet 222 of the first fluid stream 220 of First Heat Exchanger 200 is connected with the steam entry 510 of turbine generator 400 and biomass gasifying furnace 500 successively by water vapour pipeline 260, the outlet 322 of the second fluid stream 320 of the second heat exchanger 300 is connected with the hot air inlet 520 of biomass gasifying furnace 500 by hot-air pipeline 360, and the biological fuel gas outlet 530 of biomass gasifying furnace 500 is connected biological fuel gas to be injected into the heat release of kiln body of heater 100 combustion by biomass fuel gas pipeline 540 with four anti-backfire nozzles 120.Flow through entrance 331 and the outlet 332 of the entrance 231 of the first flue gas flow path 230 of First Heat Exchanger 200 and the second flue gas flow path 330 of outlet 232 and the second heat exchanger 300 from the high-temperature flue gas of kiln body of heater 100 via flue 130 successively, after abundant heat exchange, be expelled to chimney (not shown).
In this non-limiting embodiment, hot-air pipeline 360 also branch has hot-air to divide pipeline 370, hot-air divides pipeline 370 to be connected with biomass fuel gas pipeline 540 and is provided with the first blender 600 in junction, thus will be that the hot-air of 300 degrees centigrade and biological fuel gas are mixed to form premix gas at the first blender 600 from the hot-air total amount about 30% (volume content) of the second heat exchanger 300, oxygen content about 21%, temperature, then be delivered to anti-backfire nozzle 120 place.
As a kind of alternative embodiments, flue 130 is connected with the first smoke backflow pipeline 140 and the second smoke backflow pipeline 150 in the downstream of the outlet 332 of the second flue gas flow path 330 of the second heat exchanger 300.Wherein, be provided with the second blower fan F2 in first smoke backflow pipeline 140 and be connected with four anti-backfire nozzles 120, thus being that smoke backflow to four anti-backfire nozzle 120 places of 150 degrees centigrade uses as combustion-supporting gas using amount of flue gas emission about 15% (volume fraction), oxygen content about 6% (volume content), temperature.Second smoke backflow pipeline 150 is connected with the second blender 700 that hot-air pipeline 360 is arranged, thus amount of flue gas emission 15% (volume fraction) will be accounted for, oxygen content about 6% (volume content), temperature be in smoke backflow to the second blender 700 of 150 degrees centigrade, be mixed to form oxygen content about 15% with the hot-air from the oxygen content about 21% of the second heat exchanger 300, temperature being 300 degrees centigrade, temperature is, after the hot-air of 200 degrees centigrade, be delivered to biomass gasifying furnace 500 place as gasifying agent.
In this non-limiting embodiment, as shown in Figure 4, first blender 600 is identical with the structure of the second blender 700, it comprises blender body MB respectively, be located at the first kind gas access GI1 of blender body MB one end, be located at the Equations of The Second Kind gas access GI2 of blender body side, be located at the gas mixing chamber MC of blender body interior and be located at the mixed gas outlet GO of the other end of blender body, and in gas mixing chamber MC, contiguous mixed gas outlet GO is provided with rotary blade RI.
In this non-limiting embodiment, as shown in Figure 5, each anti-backfire nozzle 120 comprises nozzle body 121, be located at the jet 122 of nozzle body 121 one end, be located at the hybrid chamber 123 of nozzle body 121 inside, and be located at the other end of nozzle body 121 and the air channel distributor 124 be communicated with hybrid chamber 123, wherein, air channel distributor 124 comprises the air channel, center 1241 arranged with one heart from inside to outside, gaseous mixture air channel 1242 and flue gas air channel 1243, gaseous mixture air channel 1242 is connected with biomass fuel gas pipeline 540, air channel, center 1241 and flue gas air channel 1243 are connected with the first smoke backflow pipeline 140 respectively.In order to make biological fuel gas mix preferably with flue gas, being in gaseous mixture air channel 1242 at contiguous hybrid chamber 123 and being provided with the first rotational flow fan CF1, in flue gas air channel 1243, being provided with the second rotational flow fan CF2.
As another alternative embodiments, the water vapour of about 300 degrees Celsius that flow out after First Heat Exchanger 200 carries out heat exchange is after flowing through turbine generator and becoming the water vapour of 100 degrees centigrade, the water vapour accounting for water vapour total amount about 30% (volume fraction) is delivered in screw rod TRT 800 via pipeline and generates electricity, thus again utilize the waste heat of Industrial Stoves, the cold water of 60 degrees Celsius flowed out from screw rod TRT can utilize the second water pump P 2 to be delivered to the entrance of the first fluid stream 220 of First Heat Exchanger 200 through pipeline again, achieve recycling of energy.
Thus, the high-temperature flue gas of about 900 degrees Celsius that discharge in the burner hearth of kiln body of heater 100 flows through along flue 130 First Heat Exchanger 200 utilizing cold water to carry out heat exchange successively and is cooled to about 500 degrees Celsius, then flows through the second heat exchanger 300 utilizing cold air to carry out heat exchange and be cooled to about 150 degrees centigrade and be expelled to chimney.It is that the water at low temperature steam of 100 degrees centigrade flows out that the water vapour carrying out 300 degrees centigrade of heat exchange generation from First Heat Exchanger 200 enters that turbogenerator 400 carries out generating electricity and lower the temperature, about 70% (volume) of water at low temperature steam flows into a kind of gasifying agent of biomass gasifying furnace 500 as biomass gasifying furnace 500, about 30% water at low temperature steam then flows in screw rod TRT 800 and again generates electricity, the cold water of about 60 degrees Celsius flowed out from screw rod TRT 800 is then under the effect of the second water pump P 2, be delivered to the entrance of the first fluid stream 220 of First Heat Exchanger 200, carry out cycling hot exchange.Simultaneously, the hot-air carrying out 300 degrees centigrade of heat exchange generation in the second heat exchanger 300 then about half (volume) enter in the second blender 700, about 15% (volume) of the flue gas that the second heat exchanger 300 is discharged then also enters in the second blender 700 along the second smoke backflow pipeline 150, the another kind of gasifying agent of biomass gasifying furnace 500 as biomass gasifying furnace 500 is flowed into after flue gas and hot-air mix in the second blender 700, the hot-air that biomass gasifying furnace 500 is provided by the water vapour that utilizes First Heat Exchanger 200 and provide and the second heat exchanger 300 produces biological fuel gas.Second half hot-air carrying out heat exchange generation in the second heat exchanger 300 then enters in the first blender 600, the biological fuel gas produced with biomass gasifying furnace 500 is mixed into premix gas, be delivered to by biomass fuel gas pipeline 540 in the gaseous mixture air channel 1242 of anti-backfire nozzle 120 as combustion gas, meanwhile, about 15% (volume) of flue gas that the second heat exchanger 300 is discharged then enters in the air channel, center 1241 of anti-backfire nozzle 120 and flue gas air channel 1243 as combustion-supporting gas along the first smoke backflow pipeline 140.
Although describe the preferred embodiment of the present invention in detail at this, but should be understood that the present invention is not limited to the concrete structure described in detail and illustrate here, other modification and variant can be realized when not departing from the spirit and scope of the invention by those skilled in the art.Such as, the bootstrap system being different from First Heat Exchanger and the second heat exchanger can be set.In addition, the parameter such as temperature, oxygen content of system suitably can be chosen in scope disclosed in this invention according to concrete application conditions.
Claims (10)
1. adopt an energy-saving industrial kiln for biomass gasification fired electricity generation system, comprising:
Kiln body of heater, is provided with burner hearth in described kiln body of heater;
At least four anti-backfire nozzles, described at least four anti-backfire nozzle pitch are arranged on the furnace wall, bottom of described kiln body of heater, for combustion gas and combustion-supporting gas are ejected into the heat release of described burner hearth combustion; And
Flue, so that the flue gas produced in described burner hearth is expelled to chimney on the furnace wall, side that described flue is connected to described kiln body of heater;
It is characterized in that:
First Heat Exchanger and the second heat exchanger for making the flue gas in described flue and different fluids carry out heat exchange respectively that the energy-saving industrial kiln of the biomass gasification fired electricity generation system of described employing also comprises biomass gasification fired electricity generation system and arranges successively along the flow of flue gas direction of described flue;
Wherein, described biomass gasification fired electricity generation system comprises turbine generator and biomass gasifying furnace, and described biomass gasifying furnace has the outlet of steam entry, hot air inlet and biological fuel gas;
Described First Heat Exchanger has the first flue gas flow path and first fluid stream, and the outlet of described first fluid stream is connected with the steam entry of described turbine generator and described biomass gasifying furnace successively by water vapour pipeline;
Described second heat exchanger has the second flue gas flow path and second fluid stream, and the outlet of described second fluid stream is connected by the hot air inlet of hot-air pipeline with described biomass gasifying furnace;
The biological fuel gas outlet of described biomass gasifying furnace is connected biological fuel gas to be injected into the heat release of described kiln body of heater combustion by biomass fuel gas pipeline with described at least four anti-backfire nozzles.
2. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 1, it is characterized in that, described hot-air pipeline also branch has hot-air to divide pipeline, and described hot-air divides pipeline to be connected with described biomass fuel gas pipeline and is provided with the first blender in junction to be mixed to form premix gas by from the part hot-air of described second heat exchanger and described biological fuel gas.
3. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 2, it is characterized in that, described flue is connected with the first smoke backflow pipeline and the second smoke backflow pipeline in the downstream of the outlet of the second flue gas flow path of described second heat exchanger, wherein, described first smoke backflow pipeline is connected with described at least four anti-backfire nozzles and is used for combustion-supporting with at least four anti-backfire nozzle places described in being back to by partial fume; Described second smoke backflow pipeline be connected with the second blender that described hot-air pipeline is arranged using partial fume is back in described second blender be used for mixing with the hot-air from described second heat exchanger after be delivered to described biomass gasifying furnace as gasifying agent.
4. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 3, it is characterized in that, each anti-backfire nozzle in described at least four anti-backfire nozzles comprises nozzle body, be located at the jet of described nozzle body one end, be located at the hybrid chamber of described nozzle body inside, and be located at the other end of described nozzle body and the air channel distributor be communicated with described hybrid chamber, wherein, described air channel distributor comprises the air channel, center arranged with one heart from inside to outside, gaseous mixture air channel and flue gas air channel, described gaseous mixture air channel is connected with described biomass fuel gas pipeline, air channel, described center and described flue gas air channel are connected with described first smoke backflow pipeline respectively.
5. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 4, it is characterized in that, each described anti-backfire nozzle comprises the second rotational flow fan that contiguous described hybrid chamber is arranged at the first rotational flow fan in described gaseous mixture air channel and is arranged in described flue gas air channel further.
6. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 5, it is characterized in that, described first blender or the second blender comprise blender body, be located at the first kind gas access of described blender body one end, be located at the Equations of The Second Kind gas access of described blender body side, be located at the gas mixing chamber of described blender body interior and be located at the mixed gas outlet of the other end of described blender body, wherein, in described gas mixing chamber, contiguous described mixed gas outlet is provided with rotary blade.
7. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 6, it is characterized in that, described biomass gasification fired electricity generation system also comprises screw rod TRT, the part water vapour flowed out from described turbine generator is delivered to after described screw rod TRT changes cold water into for generating via pipeline, then is delivered to the entrance of first fluid stream of described First Heat Exchanger through pipeline.
8. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 7, it is characterized in that, the entrance of the first fluid stream of described First Heat Exchanger to be connected with to moisturizing in described first fluid stream by pipeline with the first water pump, the entrance of the second fluid stream of described second heat exchanger is connected to carry air by pipeline in described second fluid stream with the first blower fan.
9. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 8, it is characterized in that, described First Heat Exchanger comprises the first shell, described first housing interior volume is divided into the septum primum plate of reverse parallel described first flue gas flow path and described first fluid stream, and some first heat pipes be located in described septum primum plate, wherein, the evaporation ends of described first heat pipe extends in described first flue gas flow path, the condensation end of described first heat pipe extends in described first fluid stream, the outer wall of the evaporation ends of described first heat pipe is evenly equipped with several the first fins for increasing heat exchange area.
10. the energy-saving industrial kiln adopting biomass gasification fired electricity generation system as claimed in claim 9, it is characterized in that, described second heat exchanger comprises second housing, described second housing inner space is divided into the septum secundum plate of reverse parallel described second flue gas flow path and described second fluid stream, and some second heat pipes be located in described septum secundum plate, wherein, the evaporation ends of described second heat pipe extends in described second flue gas flow path, the condensation end of described second heat pipe extends in described second fluid stream, the evaporation ends of described second heat pipe and the outer wall of condensation end are evenly equipped with respectively several the second fins for increasing heat exchange area.
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