CN109506363B - Dual-heating natural gas boiler and working method thereof - Google Patents
Dual-heating natural gas boiler and working method thereof Download PDFInfo
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- CN109506363B CN109506363B CN201811413891.8A CN201811413891A CN109506363B CN 109506363 B CN109506363 B CN 109506363B CN 201811413891 A CN201811413891 A CN 201811413891A CN 109506363 B CN109506363 B CN 109506363B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 198
- 239000003345 natural gas Substances 0.000 title claims abstract description 99
- 238000010438 heat treatment Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 105
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000003546 flue gas Substances 0.000 claims abstract description 52
- 230000007704 transition Effects 0.000 claims abstract description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 229
- 239000007789 gas Substances 0.000 claims description 74
- 239000000779 smoke Substances 0.000 claims description 70
- 238000002309 gasification Methods 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 claims description 22
- 239000002737 fuel gas Substances 0.000 claims description 22
- 238000005192 partition Methods 0.000 claims description 20
- 238000005507 spraying Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
- F24H1/43—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/08—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and gaseous fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/02—Liquid fuel
- F23K5/14—Details thereof
- F23K5/22—Vaporising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2300/00—Pretreatment and supply of liquid fuel
- F23K2300/20—Supply line arrangements
- F23K2300/205—Vaporising
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a double-heating natural gas boiler which comprises a cylindrical furnace body in a transverse posture, wherein the cylindrical furnace body sequentially and coaxially comprises a left end wall, a first disc-shaped wall body, a second disc-shaped wall body, a third disc-shaped wall body, a fourth disc-shaped wall body and a right end wall body from left to right; a combustion-supporting air inlet annular cavity is formed between the left end wall and the first disc-shaped wall body, a furnace cavity is formed between the first disc-shaped wall body and the second disc-shaped wall body, a transition water cavity is formed between the second disc-shaped wall body and the third disc-shaped wall body, a flue gas heat exchange cavity is formed between the third disc-shaped wall body and the fourth disc-shaped wall body, and a water inlet cavity is formed between the fourth disc-shaped wall body and the right end wall body; the invention has simple structure and fully utilizes the waste heat of the flue gas.
Description
Technical Field
The invention belongs to the field of boilers, and particularly relates to a double-heating natural gas boiler and a working method thereof.
Background
In a natural gas boiler, the temperature of flue gas generated immediately after combustion is very high, a large amount of waste heat is contained, the flue gas can be reused as a heat source, and natural gas as a boiler fuel has the characteristics of high combustion efficiency, full combustion and the like; ethanol is liquid at normal temperature, and ethanol fuel cannot enter in a gas form like natural gas when being supplied into a hearth, so that the phenomenon of uneven combustion is easily generated in a boiler, and thus, a small number of boiler devices using ethanol as fuel are provided.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a double-heating natural gas boiler.
The technical scheme is as follows: in order to achieve the above object, a dual heating natural gas boiler of the present invention comprises a cylindrical furnace body in a horizontal posture, the cylindrical furnace body comprising, coaxially from left to right, a left end wall, a first disk-shaped wall body, a second disk-shaped wall body, a third disk-shaped wall body, a fourth disk-shaped wall body, and a right end wall body; the left end wall with form combustion-supporting air between the first disk-shaped wall body and advance the ring chamber, form the cylindricality furnace chamber between first disk-shaped wall body and the second disk-shaped wall body, form transition water cavity between second disk-shaped wall body and the third disk-shaped wall body, form flue gas heat transfer chamber between third disk-shaped wall body and the fourth disk-shaped wall body, the fourth disk-shaped wall body with form the intake antrum between the right-hand member wall body.
Furthermore, the smoke exhaust end of the cylindrical furnace chamber is coaxially connected with the left end of the smoke heat exchange chamber through a smoke exhaust channel; a flow guide column shell is coaxially arranged in the smoke heat exchange cavity, and the right end of the flow guide column shell is integrally and coaxially connected with the fourth disc-shaped wall body; one end of the diversion column shell, which is close to the third disc-shaped wall body, is a conical body, and the tip end of the conical body coaxially faces to the smoke outlet of the smoke exhaust channel; a cylindrical flue gas heat exchange channel is formed between the diversion column shell and the inner wall of the flue gas heat exchange cavity; a plurality of heat exchange straight water pipes are distributed in the flue gas heat exchange channel in a circumferential array manner, and two ends of each heat exchange straight water pipe are respectively communicated with the transition water cavity and the water inlet cavity; the water outlet end of the cold water leading-in pipe is communicated with the water inlet cavity; the inner cavity of the diversion column shell is a smoke outlet cavity; the side wall of the diversion column shell close to one end of the fourth disc-shaped wall body is uniformly and hollowly provided with a plurality of smoke guide holes in a circumferential array manner, and the smoke outlet cavity is communicated with the right end of the smoke heat exchange channel through the smoke guide holes; still include the tail gas eduction tube, the inlet end of tail gas eduction tube stretches into in the play cigarette chamber.
Further, a spiral flue gas diversion belt is spirally and coaxially arranged in the heat exchange channel in a spiral manner, and the spiral flue gas diversion belt divides the annular cylindrical heat exchange channel into spiral heat exchange channels; the hot smoke discharged from the smoke outlet of the smoke exhaust channel enters the left end of the spiral heat exchange channel.
Further, the inner wall of the cylindrical furnace chamber is spirally provided with a spiral heat exchange tube with the same center; a cylindrical furnace core is coaxially arranged in the cylindrical furnace cavity; the furnace core is also provided with a plurality of fuel gas spraying holes in a circumferential array, and the fuel gas in the furnace core is sprayed out of the cylindrical furnace chamber in a divergent manner through the fuel gas spraying holes; the water inlet end of the spiral heat exchange tube is communicated with the transition water cavity through a transition tube, and the water outlet end of the spiral heat exchange tube is communicated with a hot water delivery tube.
A plurality of combustion-supporting air inlet holes are arranged in the first disc-shaped wall body in a circumferential array in a hollow manner, and the combustion-supporting air inlet holes are used for communicating the combustion-supporting air inlet annular cavity with the cylindrical furnace chamber; a combustion-supporting air booster fan is further arranged above the cylindrical furnace body, and an air outlet pipe of the booster fan extends into the combustion-supporting air inlet annular cavity;
a gas channel and the smoke exhaust channel are coaxially arranged in the furnace core, and the gas channel and the smoke exhaust channel are blocked by a disc-shaped partition plate; each fuel gas ejection hole is communicated with the fuel gas channel; the furnace core is far away from still the fretwork is provided with a plurality of exhaust holes on the lateral wall of the one end of combustion air ring chamber that admits air, a plurality of exhaust holes intercommunication smoke exhausting channel, smoke exhausting channel's right-hand member extends to the intercommunication heat transfer passageway left end.
Further, a piston is arranged in the fuel gas channel, the piston separates the fuel gas channel into an ethanol steam channel and a natural gas channel, wherein the natural gas channel is arranged on one side of the piston close to the disc-shaped partition plate, and the ethanol steam channel is arranged on one side of the piston far away from the disc-shaped partition plate;
the device also comprises a hard gas injection straight pipe which is coaxial with the ethanol steam channel, wherein the hard gas injection straight pipe rotatably penetrates through the through hole in the central part of the first disc-shaped wall body, one end, extending into the ethanol steam channel, of the hard gas injection straight pipe is integrally connected with the piston, a natural gas supply channel is coaxially arranged in the hard gas injection straight pipe, and one end, close to the piston, of the natural gas supply channel is communicated with the natural gas channel; the other end of the hard gas injection straight pipe is fixedly connected with a gas adapter; the tail end of a linear push rod of the linear push rod motor is synchronously connected with the gas adapter; the gas adapter is characterized by also comprising a flexible natural gas supply pipe, wherein the gas outlet end of the natural gas supply pipe is connected with the gas adapter; the natural gas supply pipe is communicated with the natural gas supply channel through a gas adapter;
an ethanol gasification pipe is spirally and spirally arranged between the furnace core and the spiral heat exchange pipe; the outer diameter of the ethanol gasification pipe is smaller than that of the spiral heat exchange pipe, and the spiral pitch of the ethanol gasification pipe is larger than that of the spiral heat exchange pipe; one end of the ethanol gasification pipe is communicated with the ethanol steam channel through a switching pipe, the other end of the ethanol gasification pipe is communicated with an external ethanol liquid supply pipe, and the ethanol liquid supply pipe is also provided with a one-way valve for preventing gas from flowing backwards; air pressure sensors are arranged in the ethanol steam channel and the natural gas channel; an electronic ignition device is arranged in the cylindrical furnace cavity.
Further, a use method of the double-heating natural gas boiler comprises the following steps:
water flow path inside boiler: cold water is led into the water inlet cavity through a cold water leading-in pipe, then water in the water inlet cavity is led into the transition water cavity through a plurality of heat exchange straight water pipes, further the water in the transition water cavity is led into the spiral heat exchange pipe through the transition water pipe, and finally the water in the spiral heat exchange pipe is led out through a hot water leading-out pipe;
a first reheating process: high-temperature flue gas generated by combustion in the cylindrical furnace cavity enters the left end of the heat exchange channel through hot flue gas exhausted from a flue gas outlet of the smoke exhaust channel, and the annular cylindrical heat exchange channel is divided into spiral heat exchange channels due to the spiral flue gas guide belt; the high-temperature flue gas passes through the spiral heat exchange channel under the drainage action of the spiral flow guide belt, flows through the spiral heat exchange channel, is guided into the smoke outlet cavity through a plurality of smoke guide holes and is finally guided out through the tail gas guide pipe; in the process that high-temperature flue gas flows through the spiral heat exchange channel, heat in the flue gas is conducted to water in the heat exchange straight water pipe through the spiral flow guide belt and the heat exchange straight water pipe, and then the water in the heat exchange straight water pipe is preliminarily preheated;
the second heating process: starting a combustion-supporting air booster fan, so that combustion-supporting air wind pressure is formed in a combustion-supporting air inlet annular cavity, and further, the combustion-supporting air in the combustion-supporting air inlet annular cavity is continuously and uniformly led into the ethanol steam channel through a plurality of combustion-supporting air inlet holes; meanwhile, a linear push rod motor is started to enable the linear push rod to do contraction movement, so that a piston is driven to do movement away from a disc-shaped partition plate gradually, until all gas ejection holes in a furnace core are communicated with a natural gas channel, at the moment, a natural gas supply pipe continuously supplies natural gas to a natural gas supply channel, so that natural gas pressure is formed in the natural gas channel, further, pressure-accumulating natural gas in the natural gas channel is ejected out of a cylindrical furnace chamber in a divergent mode through a plurality of gas ejection holes, meanwhile, an electronic ignition device in the cylindrical furnace chamber is started, further, a plurality of gas ejection holes eject natural gas combustion flames to the cylindrical furnace chamber in a divergent mode, further, the tail ends of the flames are uniformly sprayed to a spiral heat exchange pipe, further, the spiral heat exchange pipe is fully heated, and further, water flowing; meanwhile, the ethanol gasification pipe is completely immersed in the flame in the cylindrical furnace cavity, so that the ethanol gasification pipe is in a continuous high-temperature state; starting a linear push rod motor to enable the linear push rod to do extension movement, and further driving a piston to do movement gradually approaching to the disc-shaped partition plate until the axial lengths of the natural gas channel and the ethanol steam channel are the same; meanwhile, the ethanol liquid supply pipe continuously supplies liquid ethanol to the ethanol gasification pipe, the liquid ethanol flowing into the ethanol gasification pipe is quickly gasified, the gasified gas ethanol steam is quickly guided into the ethanol steam channel through the adapter pipe, and pressure-stored ethanol steam is formed in the ethanol steam channel; the natural gas flame and the ethanol steam flame in the cylindrical furnace chamber continuously heat the water flowing through the spiral heat exchange tube; meanwhile, the air pressure sensors in the ethanol steam channel and the natural gas channel monitor the air pressure of the natural gas channel in real time, if the air pressure in the ethanol steam channel is greater than the air pressure in the natural gas channel, the piston is driven to move away from the disc-shaped partition plate gradually, the number of fuel gas spraying holes communicated with the ethanol steam channel is reduced, the spraying amount of the ethanol steam channel in unit time is reduced, a throttling effect is achieved, the air pressure in the ethanol steam channel is reduced until the air pressure in the ethanol steam channel is the same as the air pressure in the natural gas channel, and the spraying uniformity of the whole flame is guaranteed; similarly, if the air pressure in the ethanol steam channel is smaller than the air pressure in the natural gas channel, the piston is driven to move gradually close to the disc-shaped partition plate.
Has the advantages that: the spiral flue gas diversion device is simple in structure, waste heat of flue gas can be fully utilized, and the spiral flue gas diversion belt divides the annular cylindrical heat exchange channel into spiral heat exchange channels; the high-temperature flue gas passes through the spiral heat exchange channel under the drainage action of the spiral flow guide belt, flows through the spiral heat exchange channel, is guided into the smoke outlet cavity through a plurality of smoke guide holes and is finally guided out through the tail gas guide pipe; in the process that high-temperature flue gas flows through the spiral heat exchange channel, heat in the flue gas is conducted to water in the heat exchange straight water pipe through the spiral flow guide belt and the heat exchange straight water pipe, and then the water in the heat exchange straight water pipe is preliminarily preheated.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the equipment;
FIG. 2 is a front cross-sectional view of the overall structure of the apparatus;
FIG. 3 is a first perspective, right-half sectional view of the apparatus;
FIG. 4 is a second perspective sectional view of the right half of the apparatus;
FIG. 5 is a first cross-sectional, perspective view of the left half of the apparatus;
FIG. 6 is a second perspective sectional view of the left half of the apparatus;
fig. 7 is a third cross-sectional view of the left half of the apparatus.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A dual-heating natural gas boiler as shown in fig. 1 to 7, comprising a cylindrical furnace body 6 in a lateral attitude, said cylindrical furnace body 6 comprising, coaxially from left to right, a left end wall 12, a first disk-shaped wall 17, a second disk-shaped wall 63, a third disk-shaped wall 62, a fourth disk-shaped wall 58 and a right end wall 81; a combustion air inlet ring cavity 15 is formed between the left end wall 12 and the first disk-shaped wall body 17, a cylindrical furnace chamber 18 is formed between the first disk-shaped wall body 17 and the second disk-shaped wall body 63, a transition water cavity 57 is formed between the second disk-shaped wall body 63 and the third disk-shaped wall body 62, a flue gas heat exchange cavity is formed between the third disk-shaped wall body 62 and the fourth disk-shaped wall body 58, and a water inlet cavity 52 is formed between the fourth disk-shaped wall body 58 and the right end wall body 81.
The smoke exhaust end of the cylindrical furnace chamber 18 is coaxially connected with the left end of the smoke heat exchange chamber through a smoke exhaust channel 23.1; a flow guide column shell 54 is coaxially arranged in the flue gas heat exchange cavity, and the right end of the flow guide column shell 54 is integrally and coaxially connected with the fourth disc-shaped wall body 58; one end of the deflector column shell 54 close to the third disc-shaped wall body 62 is a cone 56, and the tip of the cone 56 coaxially faces the smoke outlet 23.2 of the smoke evacuation channel 23.1; an annular column-shaped flue gas heat exchange channel 59 is formed between the diversion column shell 54 and the inner wall of the flue gas heat exchange cavity; a plurality of heat exchange straight water pipes 61 are distributed in the flue gas heat exchange channel 59 in a circumferential array manner, and two ends of each heat exchange straight water pipe 61 are respectively communicated with the transition water cavity 57 and the water inlet cavity 52; the water inlet cavity 52 is communicated with the water outlet end of the cold water inlet pipe 11; the inner cavity of the diversion column shell 54 is a smoke outlet cavity 55; a plurality of smoke guide holes 53 are uniformly distributed and hollowed in a circumferential array on the side wall of the diversion column shell 54 close to one end of the fourth disc-shaped wall body 58, and the smoke outlet cavity 55 is communicated with the right end of the smoke heat exchange channel 59 through the smoke guide holes 53; the smoke exhaust device further comprises a tail gas delivery pipe 51, and the air inlet end of the tail gas delivery pipe 51 extends into the smoke outlet cavity 55.
A spiral flue gas guide belt 60 is spirally and coaxially arranged in the heat exchange channel 59 in a spiral manner, and the spiral flue gas guide belt 60 divides the annular cylindrical heat exchange channel 59 into spiral heat exchange channels; the hot smoke discharged from the smoke outlet 23.2 of the smoke exhaust channel 23.1 enters the left end of the spiral heat exchange channel.
The inner wall of the cylindrical furnace chamber 18 is provided with a spiral heat exchange tube 19 in a spiral manner with the same axis; a cylindrical furnace core 21 is coaxially arranged in the cylindrical furnace chamber 18; the furnace core 21 is also provided with a plurality of gas jet holes 22 which are uniformly distributed in a circumferential array, and gas in the furnace core 21 is jetted out of the cylindrical furnace chamber 18 in a divergent manner through the plurality of gas jet holes 22; the water inlet end of the spiral heat exchange tube 19 is communicated with the transition water cavity 57 through a transition tube 64, and the water outlet end of the spiral heat exchange tube 19 is communicated with the hot water delivery tube 10.
A plurality of combustion-supporting air inlet holes 16 are arranged on the first disc-shaped wall body 17 in a circumferential array in a hollow manner, and the combustion-supporting air inlet holes 16 are used for communicating the combustion-supporting air inlet annular cavity 15 with the cylindrical furnace cavity 18; a combustion air booster fan 5 is further arranged above the cylindrical furnace body 6, and an air outlet pipe 13 of the booster fan 5 extends into the combustion air inlet annular cavity 15;
a gas channel and the smoke exhaust channel 23.1 are coaxially arranged in the furnace core 21, and the gas channel and the smoke exhaust channel 23.1 are blocked by a disc-shaped partition plate 29; each fuel gas ejection hole 22 is communicated with the fuel gas channel; the side wall of one end, far away from the combustion air inlet annular cavity 15, of the furnace core 21 is further provided with a plurality of smoke exhaust holes 23 in a hollow mode, the smoke exhaust holes 23 are communicated with the smoke exhaust channel 23.1, and the right end of the smoke exhaust channel 23.1 extends to the left end of the heat exchange channel 59.
A piston 25 is arranged in the fuel gas channel, the piston 25 separates the fuel gas channel into an ethanol steam channel 27 and a natural gas channel 28, wherein the natural gas channel 28 is arranged on one side of the piston 25 close to the disc-shaped partition plate 29, and the ethanol steam channel 27 is arranged on one side of the piston 25 far away from the disc-shaped partition plate 29;
the device also comprises a hard gas injection straight pipe 4 which is coaxial with the ethanol steam channel 27, wherein the hard gas injection straight pipe 4 rotatably penetrates through a through hole 24 in the center of the first disc-shaped wall body 17, one end, extending into the ethanol steam channel 27, of the hard gas injection straight pipe 4 is integrally connected with the piston 25, a natural gas supply channel 26 is coaxially arranged in the hard gas injection straight pipe 4, and one end, close to the piston 25, of the natural gas supply channel 26 is communicated with the natural gas channel 28; the other end of the hard gas injection straight pipe 4 is fixedly connected with a gas adapter 3; the tail end of a linear push rod 2 of the linear push rod motor 1 is synchronously connected with the gas adapter 3; the gas adapter further comprises a flexible natural gas supply pipe 9, and the gas outlet end of the natural gas supply pipe 9 is connected with the gas adapter 3; the natural gas supply pipe 9 is communicated with the natural gas supply channel 26 through a gas adapter 3;
an ethanol gasification pipe 20 is spirally and spirally arranged between the furnace core 21 and the spiral heat exchange pipe 19; the outer diameter of the ethanol gasification pipe 20 is smaller than that of the spiral heat exchange pipe 19, and the spiral pitch of the ethanol gasification pipe 20 is larger than that of the spiral heat exchange pipe 19; one end of the ethanol gasification pipe 20 is communicated with the ethanol steam channel 27 through a switching pipe 31, the other end of the ethanol gasification pipe 20 is communicated with an external ethanol liquid supply pipe 7, and the ethanol liquid supply pipe 7 is also provided with a one-way valve for preventing gas from flowing backwards; air pressure sensors are arranged in the ethanol steam channel 27 and the natural gas channel 28; an electronic ignition device is arranged in the cylindrical furnace chamber 18.
The method and the process and the technical progress are organized as follows:
water flow path inside boiler: cold water is led into the water inlet cavity 52 through the cold water leading-in pipe 11, then the water in the water inlet cavity 52 is led into the transition water cavity 57 through the plurality of heat exchange straight water pipes 61, further the water in the transition water cavity 57 is led into the spiral heat exchange pipe 19 through the transition water pipe 64, and finally the water in the spiral heat exchange pipe 19 is led out through the hot water leading-out pipe 10;
a first reheating process: high-temperature flue gas generated by combustion in the cylindrical furnace chamber 18 enters the left end of the heat exchange channel 59 through hot flue gas exhausted from the flue gas outlet 23.2 of the smoke exhaust channel 23.1, and the flue gas spiral diversion belt 60 divides the cylindrical heat exchange channel 59 into spiral heat exchange channels; then the high-temperature flue gas passes through the spiral heat exchange channel under the drainage action of the spiral flow guide belt 60, flows through the spiral heat exchange channel, is guided into the flue gas outlet cavity 55 through the plurality of flue gas guide holes 53, and is finally guided out through the tail gas guide pipe 51; in the process that high-temperature flue gas flows through the spiral heat exchange channel, heat in the flue gas is conducted to water in the heat exchange straight water pipe 61 through the spiral flow guide belt 60 and the heat exchange straight water pipe 61, and then the water in the heat exchange straight water pipe 61 is preliminarily preheated;
the second heating process: starting the combustion-supporting air booster fan 5, so that the combustion-supporting air pressure is formed in the combustion-supporting air inlet annular cavity 15, and further the combustion-supporting air in the combustion-supporting air inlet annular cavity 15 is continuously and uniformly led into the ethanol steam channel 27 through the plurality of combustion-supporting air inlet holes 16; meanwhile, the linear push rod motor 1 is started to enable the linear push rod 2 to do contraction movement, and further drive the piston 25 to do movement away from the disc-shaped partition plate 29 gradually, until all the gas ejection holes 22 on the furnace core 21 are communicated with the natural gas channel 28, at the moment, the natural gas supply pipe 9 continuously supplies natural gas to the natural gas supply channel 26, thereby forming natural gas pressure in the natural gas channel 28, further the pressure-accumulating natural gas in the natural gas channel 28 is sprayed out of the cylindrical furnace chamber 18 in a divergent shape through the plurality of gas spraying holes 22, meanwhile, the electronic ignition device in the cylindrical furnace chamber 18 is started, thereby making the plurality of gas jet holes 22 jet the natural gas combustion flame to the cylindrical furnace chamber 18 in a divergent shape, the tail end of the flame is uniformly sprayed onto the spiral heat exchange tube 19, so that the spiral heat exchange tube 19 is fully heated, and the water flowing through the spiral heat exchange tube 19 is continuously heated for the second time; meanwhile, the ethanol gasification pipe 20 is completely immersed in the flame in the cylindrical furnace chamber 18, so that the ethanol gasification pipe 20 is in a continuous high-temperature state; at the moment, the linear push rod motor 1 is started to enable the linear push rod 2 to do extension movement, and further the piston 25 is driven to do movement gradually close to the disc-shaped partition plate 29 until the axial lengths of the natural gas channel 28 and the ethanol steam channel 27 are the same; at the same time, the ethanol liquid supply pipe 7 continuously supplies the liquid ethanol to the ethanol evaporation pipe 20, the liquid ethanol flowing into the ethanol evaporation pipe 20 is quickly evaporated, and the gasified gas ethanol steam is rapidly guided into the ethanol steam channel 27 through the adapter tube 31, further, the ethanol steam is formed in the ethanol steam channel 27, at this time, the plurality of fuel gas spraying holes 22 communicated with the ethanol steam channel 27 spray the ethanol steam to the cylindrical furnace chamber 18 in a divergent shape, at the same time, the gas spraying holes 22 communicated with the natural gas channel 28 spray natural gas to the cylindrical furnace chamber 18 in a divergent shape, further, the plurality of fuel gas spraying holes 22 communicated with the ethanol steam channel 27 spray ethanol steam combustion flame to the cylindrical furnace chamber 18 in a divergent shape, the gas spraying holes 22 communicated with the natural gas channel 28 spray natural gas combustion flame to the cylindrical furnace chamber 18 in a divergent shape; the natural gas flame and the ethanol steam flame in the cylindrical furnace chamber 18 jointly heat the water flowing through the spiral heat exchange tube 19 continuously; meanwhile, the air pressure sensors in the ethanol steam channel 27 and the natural gas channel 28 monitor the air pressure of the ethanol steam channel 27 and the natural gas channel 28 in real time, if the air pressure in the ethanol steam channel 27 is greater than the air pressure in the natural gas channel 28, the piston 25 is driven to move away from the disc-shaped partition 29 gradually, the number of the fuel gas spraying holes 22 communicated with the ethanol steam channel 27 is reduced, the spraying amount of the ethanol steam channel 27 in unit time is reduced, a throttling effect is achieved, the air pressure in the ethanol steam channel 27 is reduced until the air pressure in the ethanol steam channel 27 is the same as the air pressure in the natural gas channel 28, and the spraying uniformity of the whole flame is ensured; similarly, if the pressure in the ethanol vapor passage 27 is lower than the pressure in the natural gas passage 28, the piston 25 is driven to move closer to the disk 29.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. A dual-heating natural gas boiler is characterized in that: the furnace comprises a cylindrical furnace body (6) with a transverse posture, wherein the cylindrical furnace body (6) sequentially and coaxially comprises a left end wall (12), a first disc-shaped wall body (17), a second disc-shaped wall body (63), a third disc-shaped wall body (62), a fourth disc-shaped wall body (58) and a right end wall body (81) from left to right; a combustion air inlet annular cavity (15) is formed between the left end wall (12) and the first disc-shaped wall body (17), a cylindrical furnace chamber (18) is formed between the first disc-shaped wall body (17) and the second disc-shaped wall body (63), a transition water cavity (57) is formed between the second disc-shaped wall body (63) and the third disc-shaped wall body (62), a flue gas heat exchange cavity is formed between the third disc-shaped wall body (62) and the fourth disc-shaped wall body (58), and a water inlet cavity (52) is formed between the fourth disc-shaped wall body (58) and the right end wall body (81);
the smoke exhaust end of the cylindrical furnace chamber (18) is coaxially connected with the left end of the smoke heat exchange chamber through a smoke exhaust channel (23.1); a flow guide column shell (54) is coaxially arranged in the smoke heat exchange cavity, and the right end of the flow guide column shell (54) is integrally connected with the fourth disc-shaped wall body (58) coaxially; one end of the deflector column shell (54) close to the third disc-shaped wall body (62) is a conical body (56), and the tip of the conical body (56) coaxially faces to the smoke outlet (23.2) of the smoke exhaust channel (23.1); an annular cylindrical flue gas heat exchange channel (59) is formed between the flow guide column shell (54) and the inner wall of the flue gas heat exchange cavity; a plurality of heat exchange straight water pipes (61) are distributed in the flue gas heat exchange channel (59) in a circumferential array manner, and two ends of each heat exchange straight water pipe (61) are respectively communicated with the transition water cavity (57) and the water inlet cavity (52); the water inlet cavity (52) is communicated with the water outlet end of the cold water inlet pipe (11); the inner cavity of the flow guide column shell (54) is a smoke outlet cavity (55); a plurality of smoke guide holes (53) are uniformly and hollowly distributed in a circumferential array on the side wall of one end, close to the fourth disc-shaped wall body (58), of the flow guide column shell (54), and the smoke outlet cavity (55) is communicated with the right end of the smoke heat exchange channel (59) through the smoke guide holes (53); the smoke exhaust device also comprises a tail gas delivery pipe (51), wherein the air inlet end of the tail gas delivery pipe (51) extends into the smoke outlet cavity (55);
a spiral flue gas diversion belt (60) is spirally and spirally arranged in the heat exchange channel (59) coaxially, and the spiral flue gas diversion belt (60) divides the annular cylindrical heat exchange channel (59) into spiral heat exchange channels; hot smoke discharged from a smoke outlet (23.2) of the smoke exhaust channel (23.1) enters the left end of the spiral heat exchange channel;
the inner wall of the cylindrical furnace chamber (18) is provided with a spiral heat exchange tube (19) in a spiral manner with the same axis; a cylindrical furnace core (21) is coaxially arranged in the cylindrical furnace chamber (18); the furnace core (21) is also provided with a plurality of gas ejection holes (22) which are uniformly distributed in a circumferential array, and gas in the furnace core (21) is ejected out of the cylindrical furnace chamber (18) in a divergent manner through the plurality of gas ejection holes (22); the water inlet end of the spiral heat exchange tube (19) is communicated with the transition water cavity (57) through a transition tube (64), and the water outlet end of the spiral heat exchange tube (19) is communicated with a hot water delivery tube (10);
a plurality of combustion-supporting air inlet holes (16) are arranged in a circumferential array in a hollow manner on the first disc-shaped wall body (17), and the combustion-supporting air inlet holes (16) are used for communicating the combustion-supporting air inlet annular cavity (15) with the cylindrical furnace cavity (18); a combustion air booster fan (5) is further arranged above the cylindrical furnace body (6), and an air outlet pipe (13) of the booster fan (5) extends into the combustion air inlet annular cavity (15);
a gas channel and the smoke exhaust channel (23.1) are coaxially arranged in the furnace core (21), and the gas channel and the smoke exhaust channel (23.1) are blocked by a disc-shaped partition plate (29); each fuel gas ejection hole (22) is communicated with the fuel gas channel; the side wall of one end, far away from the combustion air inlet annular cavity (15), of the furnace core (21) is further provided with a plurality of smoke exhaust holes (23) in a hollowed mode, the smoke exhaust holes (23) are communicated with the smoke exhaust channel (23.1), and the right end of the smoke exhaust channel (23.1) extends to the left end communicated with the heat exchange channel (59);
a piston (25) is arranged in the gas channel, the piston (25) separates the gas channel into an ethanol steam channel (27) and a natural gas channel (28), wherein the natural gas channel (28) is arranged on one side, close to the disc-shaped partition plate (29), of the piston (25), and the ethanol steam channel (27) is arranged on one side, away from the disc-shaped partition plate (29), of the piston (25);
the device is characterized by further comprising a hard gas injection straight pipe (4) which is coaxial with the ethanol steam channel (27), wherein the hard gas injection straight pipe (4) penetrates through a through hole (24) in the center of the first disc-shaped wall body (17) in a rotating mode, one end, extending into the ethanol steam channel (27), of the hard gas injection straight pipe (4) is integrally connected with the piston (25), a natural gas supply channel (26) is coaxially arranged in the hard gas injection straight pipe (4), and one end, close to the piston (25), of the natural gas supply channel (26) is communicated with the natural gas channel (28); the other end of the hard gas injection straight pipe (4) is fixedly connected with a gas adapter (3); the gas adapter is characterized by further comprising a linear push rod motor (1), wherein the tail end of a linear push rod (2) of the linear push rod motor (1) is synchronously connected with the gas adapter (3); the device also comprises a flexible natural gas supply pipe (9), wherein the gas outlet end of the natural gas supply pipe (9) is connected with the gas adapter (3); the natural gas supply pipe (9) is communicated with the natural gas supply channel (26) through a gas adapter (3);
an ethanol gasification pipe (20) is spirally and spirally arranged between the furnace core (21) and the spiral heat exchange pipe (19); the outer diameter of the ethanol gasification pipe (20) is smaller than that of the spiral heat exchange pipe (19), and the spiral pitch of the ethanol gasification pipe (20) is larger than that of the spiral heat exchange pipe (19); one end of the ethanol gasification pipe (20) is communicated with the ethanol steam channel (27) through a switching pipe (31), the other end of the ethanol gasification pipe (20) is communicated with an external ethanol liquid supply pipe (7), and the ethanol liquid supply pipe (7) is also provided with a one-way valve for preventing gas from flowing backwards; air pressure sensors are arranged in the ethanol steam channel (27) and the natural gas channel (28); an electronic ignition device is arranged in the cylindrical furnace chamber (18).
2. Use of a dual heated natural gas boiler according to claim 1, characterized in that:
water flow path inside boiler: cold water is led into the water inlet cavity (52) through the cold water leading-in pipe (11), then water in the water inlet cavity (52) is led into the transition water cavity (57) through the plurality of heat exchange straight water pipes (61), further the water in the transition water cavity (57) is led into the spiral heat exchange pipe (19) through the transition water pipe (64), and finally the water in the spiral heat exchange pipe (19) is led out through the hot water leading-out pipe (10);
a first reheating process: high-temperature flue gas generated by combustion in the cylindrical furnace chamber (18) enters the left end of the heat exchange channel (59) through hot flue gas exhausted from a flue gas outlet (23.2) of the smoke exhaust channel (23.1), and the cylindrical heat exchange channel (59) is divided into spiral heat exchange channels due to the flue gas spiral diversion belt (60); then the high-temperature flue gas passes through the spiral heat exchange channel under the drainage action of the spiral flow guide belt (60), flows through the spiral heat exchange channel, is guided into the smoke outlet cavity (55) through a plurality of smoke guide holes (53), and is finally guided out through the tail gas guide pipe (51); in the process that high-temperature flue gas flows through the spiral heat exchange channel, heat in the flue gas is conducted to water in the heat exchange straight water pipe (61) through the spiral flow guide belt (60) and the heat exchange straight water pipe (61), and then the water in the heat exchange straight water pipe (61) is preliminarily preheated;
the second heating process: starting a combustion-supporting air booster fan (5), so that combustion-supporting air wind pressure is formed in a combustion-supporting air inlet annular cavity (15), and further combustion-supporting air in the combustion-supporting air inlet annular cavity (15) is continuously and uniformly led into an ethanol steam channel (27) through a plurality of combustion-supporting air inlet holes (16); meanwhile, the linear push rod motor (1) is started to enable the linear push rod (2) to do contraction motion, so as to drive the piston (25) to do motion away from the disc-shaped partition plate (29) gradually, until all the gas ejection holes (22) on the furnace core (21) are communicated with the natural gas channel (28), at the moment, the natural gas supply pipe (9) continuously supplies natural gas to the natural gas supply channel (26), so that natural gas pressure is formed in the natural gas channel (28), further, pressure-accumulating natural gas in the natural gas channel (28) is ejected out of the cylindrical furnace chamber (18) in a divergent mode through the plurality of gas ejection holes (22), meanwhile, the electronic ignition device in the cylindrical furnace chamber (18) is started, further, the plurality of gas ejection holes (22) are ejected out of natural gas combustion flame towards the cylindrical furnace chamber (18) in a divergent mode, further, the tail end of the flame is uniformly ejected towards the spiral heat exchange pipe (19), further carrying out second continuous heating on the water flowing through the spiral heat exchange tube (19); meanwhile, the ethanol gasification pipe (20) is completely immersed in the flame in the cylindrical furnace chamber (18), so that the ethanol gasification pipe (20) is in a continuous high-temperature state; starting the linear push rod motor (1) to enable the linear push rod (2) to do extension movement, and further driving the piston (25) to do movement gradually approaching to the disc-shaped partition plate (29) until the axial lengths of the natural gas channel (28) and the ethanol steam channel (27) are the same; meanwhile, the ethanol liquid supply pipe (7) continuously supplies liquid ethanol to the ethanol gasification pipe (20), the liquid ethanol flowing into the ethanol gasification pipe (20) is quickly gasified, the gasified gaseous ethanol steam is quickly led into the ethanol steam channel (27) through the adapter pipe (31), and further pressure-accumulated ethanol steam is formed in the ethanol steam channel (27), at the moment, a plurality of fuel gas spraying holes (22) communicated with the ethanol steam channel (27) spray ethanol steam to the cylindrical furnace chamber (18) in a divergent manner, meanwhile, a plurality of fuel gas spraying holes (22) communicated with the natural gas channel (28) spray natural gas to the cylindrical furnace chamber (18) in a divergent manner, and a plurality of fuel gas spraying holes (22) communicated with the ethanol steam channel (27) spray ethanol steam combustion flame to the cylindrical furnace chamber (18) in a divergent manner, and a plurality of fuel gas spraying holes (22) communicated with the natural gas channel (28) spray natural gas to the cylindrical furnace chamber (18) in a divergent manner Discharging natural gas to burn flame; further, the natural gas flame and the ethanol steam flame in the cylindrical furnace chamber (18) jointly heat the water flowing through the spiral heat exchange tube (19) continuously; meanwhile, the air pressure sensors in the ethanol steam channel (27) and the natural gas channel (28) monitor the air pressure of the ethanol steam channel (27) in real time, if the air pressure in the ethanol steam channel (27) is greater than the air pressure in the natural gas channel (28), the piston (25) is driven to move away from the disc-shaped partition plate (29) gradually, the number of fuel gas spraying holes (22) communicated with the ethanol steam channel (27) is reduced, the unit time spraying amount of the ethanol steam channel (27) is reduced, a throttling effect is achieved, the air pressure in the ethanol steam channel (27) is reduced until the air pressure in the ethanol steam channel (27) is the same as the air pressure in the natural gas channel (28), and the spraying uniformity of the whole flame is guaranteed; similarly, if the air pressure in the ethanol steam passage (27) is lower than the air pressure in the natural gas passage (28), the piston (25) is driven to move to gradually approach the disc-shaped partition plate (29).
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Denomination of invention: A dual heating natural gas boiler and its working method Effective date of registration: 20230324 Granted publication date: 20210430 Pledgee: Bank of Qingdao Co. Yantai branch Pledgor: Yantai Huagang Energy Technology Co.,Ltd. Registration number: Y2023980036019 |
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