CN106765009A - A kind of method of continous way heat-accumulation combustion gas heating pipe steam generator and fume afterheat synthetical recovery - Google Patents

A kind of method of continous way heat-accumulation combustion gas heating pipe steam generator and fume afterheat synthetical recovery Download PDF

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Publication number
CN106765009A
CN106765009A CN201710008223.6A CN201710008223A CN106765009A CN 106765009 A CN106765009 A CN 106765009A CN 201710008223 A CN201710008223 A CN 201710008223A CN 106765009 A CN106765009 A CN 106765009A
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China
Prior art keywords
heat
regenerator
steam generator
pipe
flue gas
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CN201710008223.6A
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Chinese (zh)
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CN106765009B (en
Inventor
张建军
朱德明
冯自平
韩颖
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Guangzhou Institute of Energy Conversion of CAS
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Guangzhou Institute of Energy Conversion of CAS
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00Combustion apparatus characterised by arrangements for air supply
    • F23C7/02Disposition of air supply not passing through burner
    • F23C7/06Disposition of air supply not passing through burner for heating the incoming air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/08Arrangements of devices for treating smoke or fumes of heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00Heating of air supplied for combustion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air Supply (AREA)

Abstract

The invention discloses a kind of continous way heat-accumulation combustion gas heating pipe steam generator and the method for fume afterheat synthetical recovery.The invention discloses a kind of continous way heat-accumulation combustion gas heating pipe steam generator, including steam generator and the heater for being arranged at steam generator bottom, heater includes air duct, gas pipeline, first four-way reversing valve, second four-way reversing valve, first regenerator, second regenerator and burner, first regenerator and the second regenerator are respectively arranged at the surrounding of steam generator bottom, first regenerator ecto-entad is disposed with the first heat-insulation layer and the first recuperation layer, second regenerator ecto-entad is disposed with the second heat-insulation layer and the second recuperation layer, burner includes the combustion chamber being connected with the first regenerator, combustion chamber connects with heat pipe heat exchanging area, heat pipe heat exchanging is provided with exhanst gas outlet outside area, smoke deflector and the heat pipe a small bundle of straw, etc. for silkworms to spin cocoons on being made up of some heat pipes are provided with heat pipe heat exchanging area.Steam generator proposed by the present invention its continous way Regenerative Combustion Technology, fuel gas buring fully, is discharged fume smooth, and the thermal efficiency is improved by the heat transfer technology of heat pipe.

Description

A kind of continous way heat-accumulation combustion gas heating pipe steam generator and fume afterheat are comprehensively returned The method of receipts
Technical field
The present invention relates to steam generator technical field, particularly a kind of continous way heat-accumulation combustion gas heating pipe steam generation The method of device and fume afterheat synthetical recovery, goes for various gas boiler.
Background technology
Industrial circle is very big to the demand of vapor, and on the current technology, steam is mainly produced by steam boiler, is passed System steam boiler rely primarily on fuel burn in burner hearth produce heat drum is directly heated to produce steam, although the method energy Steam is produced, but flue gas takes away amount of heat, exhaust gas temperature You Ji Baidu, thus the thermal efficiency is relatively low, even if using heat exchanger pair Flue gas carries out waste heat recovery, and final exhaust gas temperature still has major part heat not recycle also at 150 DEG C or so, and It is bulky and heat exchanger is perishable, complex structure, the shortcomings of service life is short.The serious of haze situation carries in many places Go out to forbid the coal-burning boiler of less than 10 tons of operation to come heating or production steam, so, have substantial amounts of gas fired-boiler and fill up this Market.Current gas-steam boiler efficiency most not higher than 90%, high fume temperature, more more than 150 DEG C, waste heat cannot Make full use of.
The content of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of continous way heat-accumulation combustion gas heating pipe steams The method of vapour generator and fume afterheat synthetical recovery, the waste heat of flue gas is initially used for heating combustion air, then to more than flue gas Heat is further reclaimed for heating feedwater, can accomplish that the limit of fume afterheat is reclaimed.Steam generator of the invention can be long-term Safe and reliable generation steam or production hot water or heat kerosene, and the heat of flue gas can fully be recycled, reduce smoke evacuation temperature Degree, reduces heat loss, improves the thermal efficiency.
The present invention is achieved through the following technical solutions:
A kind of continous way heat-accumulation combustion gas heating pipe steam generator, including steam generator is sent out with the steam is arranged at The heater of raw device bottom, the heater includes air duct, gas pipeline, the first four-way reversing valve, the second four-way Reversal valve, the first regenerator, the second regenerator and burner, first regenerator and the second regenerator are respectively arranged at institute The surrounding of steam generator bottom is stated, the first regenerator ecto-entad is disposed with the first heat-insulation layer and the first accumulation of heat Layer, the second regenerator ecto-entad is disposed with the second heat-insulation layer and the second recuperation layer, the burner include with The combustion chamber of the first regenerator connection, the combustion chamber connects with heat pipe heat exchanging area, is provided with outside the heat pipe heat exchanging area Exhanst gas outlet, is provided with smoke deflector and the heat pipe a small bundle of straw, etc. for silkworms to spin cocoons on being made up of some heat pipes in the heat pipe heat exchanging area;Described first Four-way reversing valve is connected with the first regenerator, the second regenerator, the first smoke discharging pipe and air duct respectively, second four-way Reversal valve is connected with the first regenerator, the second regenerator, the second smoke discharging pipe and comburent air duct respectively;Combustion air is successively By air duct and the first four-way reversing valve, through the first regenerator, combustion air passes through second after being heated by the first recuperation layer Four-way reversing valve enters combustion chamber, and combustion gas is mixed into combustion chamber by gas pipeline with combustion air burns in a combustion chamber, Flue gas after burning is flowed by the smoke deflector in heat pipe heat exchanging area between heat pipe, the cigarette after heat pipe heat exchanging area exchanges heat Gas enters the second regenerator by the second four-way reversing valve, heats the second recuperation layer, then by the first four-way reversing valve, through first Smoke discharging pipe is drawn, and first smoke discharging pipe is that hot water pipeline and flue are socketed, and the flue is arranged at described The inside of hot water pipeline.
In a combustion period, in upper half period, combustion air passes sequentially through the air duct and described first Four-way reversing valve, through heat-storing material in the first regenerator, air leads to after being heated by former heated heat-storing material wherein Cross the second four-way reversing valve and enter combustion chamber, about 300 DEG C or so of the heated temperature of air.Combustion gas is entered by gas pipeline fires Burning room mixes with air burns in a combustion chamber, below 1000 DEG C of heat smoke after burning, by smoke deflector between heat pipe Flowing, by baffling, can extend the time of contact of flue gas and heat pipe, have fin outside this part heat pipe, can expand heat-transfer surface Product, compared with the light pipe of conventional boiler, heat exchange area can increase by 8~10 times, therefore, the equipment of equal-wattage can be done more It is compact.In the present invention, the first four-way reversing valve is low temperature four-way valve, and the second four-way reversing valve is high-temperature four-way valve.
After heat pipe heat exchanging area exchanges heat, flue-gas temperature drops to 350 DEG C or so, then enters second by high-temperature four-way valve Regenerator, the heat-storing material inside heating, then by low temperature four-way valve, is drawn through smoke exhaust fan, and the first smoke discharging pipe is heat Waterpipe and flue are socketed, and flue is arranged at the inside of hot water pipeline, more than the further recovered flue gas of boiler feedwater Heat, flue-gas temperature can be reduced to 50 DEG C or so;Several heat pipes, heat pipe are provided with according to heating load difference in heat pipe heat exchanging area Top be arranged inside steam generator, bottom is arranged inside heat pipe heat exchanging area.
In the present invention, acted simultaneously by high-temperature four-way valve and low temperature four-way valve, it is ensured that burner combustion needs High temperature air lasting supply, it is also possible to ensure to be flowed in high-temperature flue it is constant, so, for except with natural gas It is outside fuel, kiln gas or the dirtier gas fired-boiler of biogas such as occur etc. clean combustion gas, can effectively in high temperature cigarette Waste heat recovery is carried out again after high-temperature dust removal is carried out in feed channel.
The outstanding feature of continous way heat-accumulation combustion gas heating pipe steam generator proposed by the present invention is:(1) exhaust gas temperature It is low, can fully in Mist heat recovering, including flue gas steam the latent heat of vaporization, such that it is able to improve the thermal efficiency to 95% with On;(2) heat pipe flue gas side increases fin, can increase by 8~10 times of heat exchange area, can reduce equipment volume;(3) heat pipe Heat exchange efficiency it is high, and the damage of single heat pipe does not result in the stopping of whole system in system, and service life of equipment is long;(4) Heat-storing material specific surface area used is big, and drag losses is small, can as the case may be form building enclosure, and equipment volume is small, changes Thermal effect is good;(5) at 1000 DEG C or so, the generation of thermal NO X is suppressed for flame temperature control.
Low temperature four-way valve, the setting of high-temperature four-way valve make flue gas and air that freedom is carried out in air duct and smoke discharging pipe There is heat exchange in switching, water and flue gas, flue-gas temperature is further reduced in sleeve pipe, and water absorbs heat and enters steam generator In;The setting of the two four-way valves simultaneously makes steam generator realize continous way heat-accumulation combustion, makes fuel gas buring fully, final , up to more than 95%, off-gas recovery rate is up to more than 99% for the thermal efficiency.
Steam generator energy long-term safety proposed by the present invention reliably produces steam, and the heat of flue gas fully can be returned Receive and utilize, reduce exhaust gas temperature, reduce heat loss, improve the thermal efficiency.
Preferably, the thickness of the first described heat-insulation layer and the second heat-insulation layer is respectively 150~200mm, described first The cross-sectional width of recuperation layer and the second recuperation layer is respectively 100~150mm.The heat-storing material of the first recuperation layer and the second recuperation layer Total height and structure type are calculated respectively according to the size of plant capacity.The specific surface area of the first recuperation layer and the second recuperation layer exists 1000m2/m3Left and right.
Preferably, the heat-storing material of the first described recuperation layer and the second described recuperation layer is selected from ceramic bead, honeycomb One kind in ceramics or metal beehive ceramics.The heat-storing material of the first recuperation layer and second recuperation layer can store for identical Hot material or different heat-storing materials, as long as it can reach identical accumulation of heat effect.Air and flue gas are in recuperation layer Steady flow, realizes heating of the recuperation layer to the heating and flue gas of air to recuperation layer.
Preferably, described smoke deflector is arranged alternately in the heat pipe heat exchanging area, and the movement locus for making flue gas is in S Type.Its extends time of contact of flue gas and heat pipe for the design of smoke deflector, makes the heat pipe more heats of absorption.
Preferably, described heat pipe lower end is provided with the fin of increase endotherm area, improves heat exchange efficiency.
Preferably, described steam generator top is provided with the jet chimney for discharging steam.Jet chimney is used for will The steam produced in steam generator is discharged in time.
Preferably, the TEMP for monitoring steam generator internal temperature is provided with outside described steam generator Device, the pressure sensor for monitoring pressure inside steam generator and the safety valve for ensuring steam generator safety.
Described inside heat pipe is different according to heating technique, keeps certain vacuum.Intraductal working medium is relatively low in temperature Evaporation can be just realized down, and working medium after treatment, can effectively suppress the precipitation of the on-condensible gas such as hydrogen under HTHP, and The hydrogen gasification that will can be separated out is water, it is ensured that internal vacuum, such that it is able to extend the service life of heat pipe.Intraductal working medium Can be selected regarding actual conditions, as long as the effect of needs can be reached.
Another object of the present invention is proposed more than a kind of continous way heat-accumulation combustion gas heating pipe steam generator flue gas The method of hot synthetical recovery, comprises the following steps:
(1) air is sent into the first four-way reversing valve by air blower, successively through the first pipeline, the first regenerator, the 4th pipe Road, the second four-way reversing valve and air duct arrive into burner, and in the process, air is by first in the first regenerator Recuperation layer by ambient temperature to 250 DEG C~350 DEG C, meanwhile, combustion gas by gas pipeline reach burner mix combustion with air Burn;Burn produce flue gas via absorbed by heat pipe behind heat pipe heat exchanging area and be transferred to steam generator inside heating aquatic products steam Vapour, is drawn after steam reaches sets requirement by jet chimney;Meanwhile, flue gas moves to flue gas under the guiding of smoke deflector Outlet enters the second smoke discharging pipe, then enters the concurrent heat of the second recuperation layer through the second four-way reversing valve and the 3rd pipeline successively Exchange, the temperature reduction of flue gas, flue gas sequentially passes through second pipe and the first four-way reversing valve, in the process, fume afterheat Stored in the second recuperation layer, flue gas is sent into the first smoke discharging pipe, the flue gas hot water in smoke discharging pipe by air-introduced machine Water in pipeline, the water in hot water pipeline enters steam generator through delivery pipeline, and the temperature of flue gas is further reduced, row In entering atmospheric environment;
(2) air is sent into the first four-way reversing valve by air blower, successively through second pipe, the second regenerator, the 3rd pipe Road, the second four-way reversing valve and air duct reach burner, and in the process, air is by the second accumulation of heat in the second regenerator Layer by ambient temperature to 250 DEG C~350 DEG C, meanwhile, combustion gas reaches burner and air mixed combustion by gas pipeline;Combustion The flue gas for producing is burnt via being absorbed by heat pipe behind heat pipe heat exchanging area and being transferred to steam generator inside heating aquatic products steam, works as steaming Vapour is drawn after reaching sets requirement by jet chimney;Meanwhile, flue gas moves to exhanst gas outlet and enters under the guiding of smoke deflector Enter the second smoke discharging pipe, then entering the concurrent heat of the first recuperation layer through the second four-way reversing valve and the 4th pipeline successively exchanges, The temperature reduction of flue gas, flue gas sequentially passes through the first pipeline and the first four-way reversing valve, and in the process, fume afterheat is stored In the first recuperation layer, flue gas is sent into the first smoke discharging pipe by air-introduced machine, in the flue gas hot water pipeline in smoke discharging pipe Water, the water in hot water pipeline enters steam generator through delivery pipeline, and the temperature of flue gas is further reduced, and enters air In environment.
(3) above-mentioned steps (1) and step (2) are repeated, circulation is carried out, and realizes fume afterheat synthetical recovery.
The beneficial effects of the invention are as follows:
(1) steam generator proposed by the present invention uses continous way Regenerative Combustion Technology, and fuel gas buring fully, is discharged fume suitable Freely;
(2) thermal efficiency is improved by the high efficient heat exchanging technology of heat pipe;
(3) the heat limit of flue gas is recycled by heat-storing material, reduces exhaust gas temperature, reduce heat loss, thus The thermal efficiency is very high, and up to more than 95%, exhaust gas temperature is higher than environment temperature to be not more than 30 DEG C to the final thermal efficiency of the system.
Brief description of the drawings
Fig. 1 is a kind of structural representation of continous way heat-accumulation combustion gas heating pipe steam generator of the invention;
Fig. 2 is a kind of structural representation of continous way heat-accumulation combustion gas heating pipe steam generator of the invention;
In figure:1st, air blower;2nd, air duct;3rd, low temperature four-way valve;4th, the first pipeline;5th, second pipe;6th, air-introduced machine; 7th, inlet channel;8th, hot water pipeline;9th, the first smoke discharging pipe;10th, delivery pipeline;11st, the second heat-insulation layer;12nd, second stores Thermosphere;13rd, the 3rd pipeline;14th, exhanst gas outlet;15th, the second smoke discharging pipe;16th, smoke deflector;17th, hot-air duct;18、 High-temperature four-way valve;19th, valve;20th, gas pipeline;21st, burner;22nd, the 4th pipeline;23rd, the first recuperation layer;24th, temperature is passed Sensor;25th, pressure sensor;26th, safety valve;27th, pressure vessel;28th, heat pipe;29th, heat pipe heat exchanging area;30th, jet chimney.
Specific embodiment
Present disclosure is described in further details with reference to the accompanying drawings and detailed description.
A kind of continous way heat-accumulation combustion gas heating pipe steam generator, including steam generator and it is arranged at steam generator The heater of bottom, heater includes air duct, gas pipeline, the first four-way reversing valve, the second four-way reversing valve, the One regenerator, the second regenerator and burner, the first regenerator and the second regenerator are respectively arranged at steam generator bottom Surrounding, the first regenerator ecto-entad is disposed with the first heat-insulation layer and the first recuperation layer, the second regenerator ecto-entad The second heat-insulation layer and the second recuperation layer are disposed with, burner includes the combustion chamber being connected with the first regenerator, combustion chamber Connected with heat pipe heat exchanging area, exhanst gas outlet be provided with outside heat pipe heat exchanging area, be provided with heat pipe heat exchanging area smoke deflector and by Some heat pipe a small bundle of straw, etc. for silkworms to spin cocoons ons of heat pipe composition;First four-way reversing valve respectively with the first regenerator, the second regenerator, the first smoke discharging pipe Connected with air duct, the second four-way reversing valve respectively with the first regenerator, the second regenerator, the second smoke discharging pipe and combustion-supporting sky Feed channel is connected;Combustion air passes sequentially through air duct and the first four-way reversing valve, and through the first regenerator, combustion air is by Combustion chamber is entered by the second four-way reversing valve after the heating of one recuperation layer, combustion gas enters combustion chamber and combustion-supporting sky by gas pipeline Gas mixing is burnt in a combustion chamber, and the flue gas after burning is flowed by the smoke deflector in heat pipe heat exchanging area between heat pipe, is passed through Flue gas after the heat exchange of superheater tube heat transfer zone enters the second regenerator by the second four-way reversing valve, heats the second recuperation layer, then lead to The first four-way reversing valve is crossed, is drawn through the first smoke discharging pipe, the first smoke discharging pipe is that hot water pipeline and flue are socketed, flue gas Pipeline is arranged at the inside of hot water pipeline.In the present invention, the first four-way reversing valve is low temperature four-way valve, the second four-way reversing valve It is high-temperature four-way valve.
Embodiment
Refering to Fig. 1~2, Fig. 1 and Fig. 2 is the structural representation of continous way heat-accumulation combustion gas heating pipe steam generator.
Continous way heat-accumulation combustion gas heating pipe steam generator proposed by the invention, including steam generator and be arranged at The heater of the steam generator bottom, heater includes air duct 2, gas pipeline 20, low temperature four-way valve 3, height Warm four-way valve 18, the first regenerator, the second regenerator and burner, the first regenerator and the second regenerator are respectively arranged at steaming The surrounding of vapour generator bottom, the first regenerator ecto-entad is disposed with the first heat-insulation layer and the first recuperation layer 23, second Regenerator ecto-entad is disposed with the second heat-insulation layer 11 and the second recuperation layer 12, and burner includes connecting with the first regenerator The combustion chamber for connecing, combustion chamber is connected with heat pipe heat exchanging area 29, and exhanst gas outlet 14, heat pipe heat exchanging area are provided with outside heat pipe heat exchanging area 29 Smoke deflector 16 and the heat pipe a small bundle of straw, etc. for silkworms to spin cocoons on being made up of some heat pipes 28 are provided with 29;Low temperature four-way valve 3 respectively with the first accumulation of heat Room, the second regenerator, the first smoke discharging pipe 9 are connected with air duct, and high-temperature four-way valve 18 stores with the first regenerator, second respectively Hot cell, the second smoke discharging pipe 15 are connected with comburent air duct;Combustion air passes sequentially through air duct 2 and low temperature four-way valve 3, Through the first regenerator, combustion air enters combustion chamber after being heated by the first recuperation layer 23 by high-temperature four-way valve 18, and combustion gas passes through Gas pipeline 20 mixes with combustion air into combustion chamber and burns in a combustion chamber, and the flue gas after burning passes through heat pipe heat exchanging area 29 Interior smoke deflector 16 flows between heat pipe 28, and the flue gas after heat pipe heat exchanging area 29 exchanges heat enters by high-temperature four-way valve 18 Enter the second regenerator, heat the second recuperation layer 12, then by low temperature four-way valve 3, drawn through the first smoke discharging pipe 9, the first smoke evacuation Pipeline 9 is that hot water pipeline 8 and flue are socketed, and flue is arranged at the inside of hot water pipeline 8, the water in hot water pipeline 8 There is provided by inlet channel 7.The top of heat pipe 28 is arranged inside steam generator, and bottom is arranged in heat pipe heat exchanging area 29 Portion.Hot water pipeline 8 and flue are socketed, and make water and flue gas that heat exchange to occur in sleeve pipe, and flue-gas temperature is further reduced, water Heat is absorbed to enter in steam generator.
In the present embodiment, heat pipe 28 is uniformly vertically arranged in heat pipe heat exchanging area 29, is extended by smoke deflector 16 The time of contact of flue gas and heat pipe.Heat pipe evaporation side completes heat by exothermic condensation section in smoke absorption heat in drum heat release The transmission of amount.
Steam generator can be pressure vessel, boiler or it is any it may occur to persons skilled in the art that storage steam Container can, can be used for producing steam, it is also possible to for producing hot water or heating heat kerosene etc., steam in the present embodiment Vapour generator is pressure vessel 27.The temperature sensor for monitoring pressure container internal temperature is provided with outside pressure vessel 27 24th, for monitoring pressure container internal pressure pressure sensor 25 and the safety valve 26 for ensuring pressure vessel safety.
Low temperature four-way valve 3, the setting of high-temperature four-way valve 18 make flue gas and air in the smoke discharging pipe 9 of air duct 2 and first In carry out free switching, there is heat exchange in water and flue gas, flue-gas temperature is further reduced in sleeve pipe, water absorb heat enter steam In vapour generator;The setting of the two four-way valves simultaneously makes steam generator realize continous way heat-accumulation combustion, fills fuel gas buring Point, up to more than 95%, off-gas recovery rate is up to more than 98% for the final thermal efficiency.Four-way valve can be two-position four-way valve or three Position four-way valve, it can meet flue gas and air in the first pipeline 4 and the pipeline 13 of second pipe 5 or the 3rd and the 4th pipeline Free switching is carried out in 22, preferred high-temperature four-way valve and low temperature four-way valve are two-position four-way valve in the present embodiment.
The heat-storing material of the first recuperation layer 23 and the second recuperation layer 12 is selected from ceramic bead, ceramic honey comb or metal beehive pottery One kind in porcelain.The heat-storing material of the first recuperation layer 23 and the second recuperation layer 12 can be identical heat-storing material or different Heat-storing material, it can be played expects identical effect.In the present apparatus, the first recuperation layer and the first heat-insulation layer are together as stove Wall, or the second recuperation layer and the second heat-insulation layer, because heat-storing material has larger heat exchange area, compare table together as furnace wall Area up to 1000 cubes every square, therefore, ensure heat transfer effect on the premise of, can effectively reduce equipment volume.Tradition Boiler compare, finned tube instead of light pipe, and heat exchange area improves 8~10 times, ensure heat transfer effect while, Ke Yijin One step reduces the device space.The steady flow in recuperation layer of air and flue gas, realizes heating and flue gas of the recuperation layer to air Heating to accumulation of heat row.First heat-insulation layer and the second heat-insulation layer 11 are ceramic fiber blanket, the first heat-insulation layer and the second heat-insulation layer 11 Thickness be respectively 150~200mm, the cross-sectional width of the first recuperation layer and the second recuperation layer is respectively 100~150mm, accumulation of heat Material total height and structure type are calculated respectively according to the size of plant capacity.First heat-insulation layer makes what the first accumulation of heat mechanism stored Heat is not easy to distribute, and the second heat-insulation layer makes the heat that the second accumulation of heat mechanism stores be not easy to distribute.
Steam generator top is provided with the jet chimney 30 for discharging steam.Jet chimney 30 is used for steam generator The steam of middle generation is discharged in time.
Several smoke deflectors 16 are provided with heat pipe heat exchanging area 29, smoke deflector 16 is in the flue of heat pipe heat exchanging area 29 Inside it is arranged alternately, the movement locus for making flue gas is in " S " type.Smoke deflector 16 design its extend contact of the flue gas with heat pipe Time, heat pipe is set to absorb more heats.The quantity of smoke deflector 16 can be set according to actual needs, in the present embodiment flue gas The quantity of deflector is 3, its effect that can just reach off-gas recovery.
The method of the fume afterheat synthetical recovery of continous way regenerative combustion type gas heating pipe steam generator of the invention, bag Include following steps:
(1) air sends into air duct 2 and first passes around low temperature four-way valve 3 by air blower 1, then successively through the first pipeline 4, First recuperation layer 23, the 4th pipeline 22, high-temperature four-way valve 18 and hot-air duct 17, reach burner 21 and enter combustion chamber, During this, air is by the first recuperation layer 23 by ambient temperature to 250 DEG C~350 DEG C;Meanwhile, combustion gas is by gas pipeline 20, through valve 19, up to burner 21 and air mixed combustion;The high-temperature flue gas for producing that burn are absorbed by heat pipe 28 and are transferred to pressure Force container 27 heats aquatic products steam, is drawn by jet chimney 30 after steam reaches sets requirement, meanwhile, flue gas is in flue gas water conservancy diversion Exhanst gas outlet 14 is moved to by " S " track under the guiding of plate 16, the time of contact with heat pipe 28 is increased, heat pipe 28 is absorbed more Many heats;Flue gas enters the second smoke discharging pipe 15 by exhanst gas outlet 14, successively through high-temperature four-way valve 18, the 3rd pipeline 13, the The concurrent heat of two recuperation layers 12 is exchanged, and the second recuperation layer 12 absorbs the heat of flue gas, and temperature is raised, flue-gas temperature reduction, through the Two pipeline 5 enters low temperature four-way valve 3, and in the process, fume afterheat is stored in the second recuperation layer 12, and flue gas is cooled, Temperature is reduced to 100 DEG C or so by 320 DEG C, and this temperature is mainly and ensures that water vapour is non-condensing in flue gas, then is sent by air-introduced machine 6 Enter the first smoke discharging pipe 9, the water that the flue gas in the first smoke discharging pipe 9 are entered in hot water pipeline 8 by inlet channel 7, flue gas By after air-introduced machine 6, water and flue gas occur heat exchange in hot water pipeline 8 in the process, the temperature rising of water is defeated through hot water Pipeline 10 is sent to enter pressure vessel 27, the temperature of flue gas is further decreased to 50 DEG C~60 DEG C, enters in atmospheric environment;In upper half Cycle, the first recuperation layer 23 is cooled, and the second recuperation layer 12 is heated;
(2) air sends into air duct 2 and first passes around low temperature four-way valve 3 by air blower 1, and now low temperature four-way valve 3 has been changed To, air successively through second pipe 5, the second recuperation layer 12, the 3rd pipeline 13 and high-temperature four-way valve 18, now high-temperature four-way valve 18 It has been commutated that, air enters hot-air duct 17, reached burner 21, in the process, air is by the second regenerator heat-storing material Layer 12 by ambient temperature to 250 DEG C~350 DEG C, meanwhile, combustion gas by gas pipeline 20, through valve 19, up to burner 21 with Air is blended in burning Indoor Combustion;The high-temperature flue gas for producing that burn are absorbed by heat pipe 28 and are transferred to pressure vessel 27 and heat water Producing steam, is drawn after steam reaches sets requirement by jet chimney 30, meanwhile, flue gas is pressed under the guiding of smoke deflector 16 " S " track moves to exhanst gas outlet 14, increased the time of contact with heat pipe 28, heat pipe 28 is absorbed more heats;Flue gas By exhanst gas outlet 14 successively through the second smoke discharging pipe 15, the pipeline 22 of high-temperature four-way valve 18 and the 4th after, through the first recuperation layer 23 simultaneously Generation heat exchange, the first recuperation layer 23 absorbs the heat of flue gas, and temperature is raised, and flue-gas temperature reduction enters low through the first pipeline 4 Warm four-way valve 3, in the process, fume afterheat is stored in the first recuperation layer 23, and flue gas is cooled, and temperature is by 320 DEG C of drops It is low to 100 DEG C or so, this temperature is mainly in guarantee flue gas that water vapour is non-condensing, then sends into the first smoke exhaust pipe by air-introduced machine 6 Road 9, by after air-introduced machine, water and flue gas occur heat exchange in hot water pipeline 8 in the process, the temperature of water raises warp to flue gas Delivery pipeline 10 enters pressure vessel 27, and the temperature of flue gas is further decreased to 50 DEG C~60 DEG C, enters in atmospheric environment, In the lower half cycle, the second recuperation layer 12 is cooled, and the first recuperation layer 23 is heated;
(2) two processes of above step (1) and step form a cycle and then circulate and carry out, and the heat of flue gas is able to pole Limit is recycled, thus the thermal efficiency is very high, and the heat recovery rate of flue gas can reach more than 98%.By high-temperature four-way valve and low Warm four-way valve is acted simultaneously, it is ensured that the lasting supply of the high temperature air that burner combustion needs, it is also possible to ensure height Flowed in warm flue it is constant, so, for except being in addition to fuel, kiln gas or biomass such as occur with the clean combustion gas such as natural gas The dirtier gas fired-boiler such as gas, waste heat recovery is carried out after effectively can carrying out high-temperature dust removal in high-temperature flue gas pipeline again.
The waste heat of its flue gas of steam generator proposed by the present invention is initially used for heating combustion air, then to fume afterheat Further reclaim for heating feedwater, can accomplish that the limit of fume afterheat is reclaimed;It can fully reclaim profit to the heat of flue gas With, exhaust gas temperature is reduced, heat loss is reduced, improve the thermal efficiency;Continous way Regenerative Combustion Technology, fuel gas buring fully, is discharged fume suitable Freely, the thermal efficiency is improved by the high efficient heat exchanging technology of heat pipe.
Above-listed detailed description is directed to illustrating for possible embodiments of the present invention, and the embodiment simultaneously is not used to limit this hair Bright the scope of the claims, all equivalence enforcements or change without departing from carried out by the present invention are intended to be limited solely by the scope of the claims of this case.

Claims (8)

1. a kind of continous way heat-accumulation combustion gas heating pipe steam generator, it is characterised in that:Including steam generator and being arranged at The heater of the steam generator bottom, the heater includes air duct, gas pipeline, the commutation of the first four-way Valve, the second four-way reversing valve, the first regenerator, the second regenerator and burner, first regenerator and the second regenerator The surrounding of the steam generator bottom is respectively arranged at, the first regenerator ecto-entad is disposed with the first heat-insulation layer With the first recuperation layer, the second regenerator ecto-entad is disposed with the second heat-insulation layer and the second recuperation layer, the burning Device includes the combustion chamber being connected with first regenerator, and the combustion chamber connects with heat pipe heat exchanging area, the heat pipe heat exchanging Exhanst gas outlet is provided with outside area, smoke deflector and the heat pipe being made up of some heat pipes are provided with the heat pipe heat exchanging area A small bundle of straw, etc. for silkworms to spin cocoons on;First four-way reversing valve is connected with the first regenerator, the second regenerator, the first smoke discharging pipe and air duct respectively, Second four-way reversing valve is connected with the first regenerator, the second regenerator, the second smoke discharging pipe and comburent air duct respectively; Combustion air passes sequentially through air duct and the first four-way reversing valve, and through the first regenerator, combustion air is added by the first recuperation layer Combustion chamber is entered by the second four-way reversing valve after heat, combustion gas is blended in combustion by gas pipeline into combustion chamber and combustion air Burning in room is burnt, the flue gas after burning is flowed by the smoke deflector in heat pipe heat exchanging area between heat pipe, by heat pipe heat exchanging Flue gas after area's heat exchange enters the second regenerator by the second four-way reversing valve, heats the second recuperation layer, then by the first four-way Reversal valve, draws through the first smoke discharging pipe, and first smoke discharging pipe is that hot water pipeline and flue are socketed, the fume pipe Road is arranged at the inside of the hot water pipeline.
2. continous way heat-accumulation combustion gas heating pipe steam generator according to claim 1, it is characterised in that:Described The thickness of one heat-insulation layer and second heat-insulation layer is respectively 150~200mm, described the first recuperation layer and the second described storage The cross-sectional width of thermosphere is respectively 100~150mm.
3. continous way heat-accumulation combustion gas heating pipe steam generator according to claim 1 and 2, it is characterised in that:It is described The first recuperation layer and the second described recuperation layer heat-storing material be selected from ceramic bead, ceramic honey comb or metal beehive ceramics in One kind.
4. continous way heat-accumulation combustion gas heating pipe steam generator according to claim 1 and 2, it is characterised in that:It is described Smoke deflector be arranged alternately in the heat pipe heat exchanging area, make the movement locus of flue gas S-type.
5. continous way heat-accumulation combustion gas heating pipe steam generator according to claim 1 and 2, it is characterised in that:It is described Heat pipe lower end be provided with increase endotherm area fin.
6. continous way heat-accumulation combustion gas heating pipe steam generator according to claim 1 and 2, it is characterised in that:It is described Steam generator top be provided with by steam discharge jet chimney.
7. continous way heat-accumulation combustion gas heating pipe steam generator according to claim 1 and 2, it is characterised in that:It is described Steam generator outside be provided with for monitor steam generator internal temperature temperature sensor, for monitoring steam generation The pressure sensor of device internal pressure and the safety valve for ensuring steam generator safety.
8. the side of continous way heat-accumulation combustion gas heating pipe steam generator fume afterheat synthetical recovery described in a kind of claim 1 Method, it is characterised in that comprise the following steps:
(1) air is sent into the first four-way reversing valve by air blower, successively through the first pipeline, the first regenerator, the 4th pipeline, the Two four-way reversing valves and air duct arrive into burner, and in the process, air is by the first accumulation of heat in the first regenerator Layer by ambient temperature to 250 DEG C~350 DEG C, meanwhile, combustion gas reaches burner and air mixed combustion by gas pipeline;Combustion The flue gas for producing is burnt via being absorbed by heat pipe behind heat pipe heat exchanging area and being transferred to steam generator inside heating aquatic products steam, works as steaming Vapour is drawn after reaching sets requirement by jet chimney;Meanwhile, flue gas moves to exhanst gas outlet and enters under the guiding of smoke deflector Enter the second smoke discharging pipe, then entering the concurrent heat of the second recuperation layer through the second four-way reversing valve and the 3rd pipeline successively exchanges, The temperature reduction of flue gas, flue gas sequentially passes through second pipe and the first four-way reversing valve, and in the process, fume afterheat is stored In the second recuperation layer, flue gas is sent into the first smoke discharging pipe, the flue gas hot-water line in the first smoke discharging pipe by air-introduced machine Water in road, the water in hot water pipeline enters steam generator through delivery pipeline, and the temperature of flue gas is further reduced, entered In atmospheric environment;
(2) air is sent into the first four-way reversing valve by air blower, successively through second pipe, the second regenerator, the 3rd pipeline, the Two four-way reversing valves and air duct reach burner, in the process, air by the second recuperation layer in the second regenerator by Ambient temperature to 250 DEG C~350 DEG C, meanwhile, combustion gas reaches burner and air mixed combustion by gas pipeline;Burning is produced Raw flue gas via absorbed by heat pipe behind heat pipe heat exchanging area and be transferred to steam generator inside heating aquatic products steam, when steam is arrived Drawn by jet chimney after up to sets requirement;Meanwhile, flue gas moves to exhanst gas outlet under the guiding of smoke deflector and enters Two smoke discharging pipes, then enter the concurrent heat of the first recuperation layer and exchange through the second four-way reversing valve and the 4th pipeline successively, flue gas Temperature reduction, flue gas sequentially passes through the first pipeline and the first four-way reversing valve, and in the process, fume afterheat is stored the In one recuperation layer, by air-introduced machine by flue gas send into the first smoke discharging pipe, the water in flue gas hot water pipeline in smoke discharging pipe, Water in hot water pipeline enters steam generator through delivery pipeline, and the temperature of flue gas is further reduced, and enters atmospheric environment In;
(3) above-mentioned steps (1) and step (2) are repeated, circulation is carried out, and realizes fume afterheat synthetical recovery.
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