CN111765635A - Energy-saving environment-friendly heat conduction oil boiler - Google Patents
Energy-saving environment-friendly heat conduction oil boiler Download PDFInfo
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- CN111765635A CN111765635A CN202010741412.6A CN202010741412A CN111765635A CN 111765635 A CN111765635 A CN 111765635A CN 202010741412 A CN202010741412 A CN 202010741412A CN 111765635 A CN111765635 A CN 111765635A
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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
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING 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
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
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Abstract
The invention discloses an energy-saving environment-friendly heat conduction oil boiler, which comprises a boiler main machine, a waste heat boiler and an air preheater; the waste heat boiler comprises a vertical body; a vertical snake-shaped heat exchange tube is arranged in the vertical body, and a straight tube section of the vertical snake-shaped heat exchange tube is inclined upwards; an upper outlet of the vertical serpentine heat exchange tube is communicated with a steam inlet of the steam drum; the bottom of the steam pocket is provided with a centralized downcomer, and the top of the steam pocket is provided with a steam outlet pipe seat; the air preheater comprises an external frame, and a plurality of vertical heat exchange tubes are arranged in the external frame; a flue gas outlet of the boiler main machine is connected with a flue gas inlet at the top of the waste heat boiler; and a flue gas outlet at the bottom of the waste heat boiler is communicated with a vertical heat exchange tube in the air preheater. The tail end of the main machine of the boiler is provided with the two-stage energy-saving device of the waste heat boiler and the air preheater, so that the final exhaust gas temperature of the boiler can be effectively reduced, the final exhaust gas temperature of the boiler is not higher than 100 ℃, and the thermal efficiency of the boiler is greatly improved.
Description
Technical Field
The invention belongs to the technical field of boilers, and particularly relates to an energy-saving and environment-friendly heat conduction oil boiler.
Background
The heat conducting oil boiler is a boiler using heat conducting oil as a heat carrying medium, generally coal, oil and gas are used as fuel, the heat conducting oil is used as the heat carrying medium, the liquid phase heat conducting oil boiler uses a hot oil circulating oil pump to force the medium to carry out liquid phase circulation, heat energy is transmitted to heat utilization equipment and then returned to a heating furnace for reheating, higher working temperature can be obtained under lower working pressure, and steel is saved. Because the temperature of the medium in the heat conduction oil boiler is high and is usually 260-320 ℃, the exhaust gas temperature of the boiler is also high and is usually more than 300 ℃, energy waste is caused, and the heat efficiency is low.
Therefore, it is highly desirable to design an energy-saving and environment-friendly heat conduction oil boiler capable of reducing the final exhaust gas temperature of the boiler to improve the thermal efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an energy-saving and environment-friendly heat conduction oil boiler.
In order to achieve the purpose, the invention adopts the following technical scheme:
an energy-saving environment-friendly heat conduction oil boiler comprises a boiler main machine, a waste heat boiler and an air preheater;
the waste heat boiler comprises a vertical body; a plurality of rows of vertical snake-shaped heat exchange tubes are arranged in the vertical body, and straight tube sections of the vertical snake-shaped heat exchange tubes are in an upward inclined state along the flowing direction of media in the vertical snake-shaped heat exchange tubes; an outlet at the upper part of the vertical type serpentine heat exchange tube is communicated with the steam pocket; the bottom of the steam drum is provided with a centralized downcomer which is communicated with the lower inlet of the vertical serpentine heat exchange tube through a lower water collection tank, the top of the steam drum is provided with a steam outlet tube seat, and the side wall of the steam drum is provided with a water inlet tube;
the air preheater comprises an external frame, and a plurality of vertical heat exchange tubes are arranged in the external frame;
a flue gas outlet of the boiler main machine is connected with a flue gas inlet at the top of the waste heat boiler through a flue gas pipeline; a flue gas outlet at the bottom of the waste heat boiler is communicated with a vertical heat exchange tube in the air preheater; a smoke outlet at the bottom of the air preheater is communicated with a smoke collection cavity, and a smoke outlet is arranged at one side of the smoke collection cavity;
a cold air inlet and a hot air outlet are respectively arranged at two sides of the air preheater; and the hot air outlet is communicated with an air inlet of a burner in the boiler main machine through an air pipeline.
Preferably, the straight pipe sections of the vertical type snake-shaped heat exchange pipe are spirally wound with steel strips.
Preferably, the inclination angle of the straight pipe section of the vertical type snakelike heat exchange pipe is 3-5 degrees.
Preferably, the other end of the steam outlet pipe seat is connected with an inlet of an external steam-water separator; and a water outlet pipe at the bottom of the steam-water separator is communicated with the interior of the steam drum.
Preferably, the air preheater is positioned at the bottom of the waste heat boiler; the smoke collection cavity is positioned at the bottom of the air preheater.
Preferably, horizontal tube plates are fixedly arranged at the top and the bottom of the air preheater respectively; two ends of the vertical heat exchange tube penetrate through the corresponding horizontal tube plate and are fixedly connected with the horizontal tube plate; the horizontal tube plate at the lower part is connected with the outer frame, and the horizontal tube plate at the upper part is connected with the outer frame through an expansion joint.
Preferably, a turbulence strip in a spring wire shape is arranged in the vertical heat exchange tube; the flow disturbing strips extend from the upper end to the bottom end of the vertical heat exchange tube.
Preferably, the main boiler is arranged horizontally, a burner is arranged at the front part of the main boiler, and a flue gas outlet is arranged at the tail part of the main boiler;
a spiral inner coil and a spiral outer coil are arranged in the boiler main machine; the spiral inner coil pipe encloses a hearth, a first convection channel is enclosed between the spiral inner coil pipe and the spiral outer coil pipe, and a second convection channel is enclosed between the spiral outer coil pipe and a shell of the boiler main machine.
Preferably, the inner wall of the front part of the main boiler body is coated with refractory mortar, and the wall surface of the front part of the main boiler body is provided with a plurality of layers of heat-insulating layers.
Preferably, the tail part of the main machine of the boiler is provided with a smoke baffle wall; the smoke partition wall and the rear end cover of the boiler main machine form a rear smoke chamber, and the rear smoke chamber is communicated with the second convection channel and the smoke outlet.
The invention has the beneficial effects that:
(1) the tail end of the boiler main machine is provided with the two-stage energy-saving device of the waste heat boiler and the air preheater, so that waste heat in smoke at the smoke outlet of the boiler main machine is recycled, and the final smoke exhaust temperature of the boiler can be effectively reduced; meanwhile, the arrangement of the waste heat boiler of the primary energy-saving device can provide part of steam for production and life for users, so that the heat efficiency of the boiler is greatly improved; the secondary energy-saving device air preheater can further reduce the final exhaust gas temperature, improve the temperature of cold air entering the boiler, ensure that the final exhaust gas temperature of the boiler is not higher than 100 ℃, and further improve the thermal efficiency of the boiler.
(2) A plurality of rows of vertical snakelike heat exchange tubes are arranged in the waste heat boiler, the straight tube sections of the vertical snakelike heat exchange tubes are in an upward inclined state along the flowing direction of media in the vertical snakelike heat exchange tubes, and steel strips are spirally wound on the straight tube sections of the vertical snakelike heat exchange tubes; the inclined tube bundle is arranged, so that steam in a steam-water mixture generated in the vertical serpentine heat exchange tube can quickly enter a steam pocket at the upper part, and the phenomenon that a large amount of steam is accumulated in the vertical serpentine heat exchange tube to influence the safe operation of the boiler when the boiler is in operation is prevented; the arrangement of the steel belt can increase the heating surface and improve the heat transfer efficiency.
(3) According to the air preheater, the arrangement of the turbulence strips in the vertical heat exchange tube can change the flowing state of the flue gas in the tube, so that the heat exchange process is enhanced, and the heat exchange is more sufficient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural diagram of an energy-saving and environment-friendly heat transfer oil boiler according to the present invention;
FIG. 2 is a schematic structural view of a main unit of the boiler according to the present invention;
FIG. 3 is a schematic diagram of an air preheater according to the present invention;
wherein the content of the first and second substances,
1-a boiler main machine, 11-a flue gas outlet, 12-a combustor, 13-a spiral inner coil, 14-a spiral outer coil, 15-a hearth, 16-a first convection channel, 17-a second convection channel, 18-a distance tube, 19-refractory mortar, 110-a smoke barrier, 111-a rear smoke chamber and 112-an explosion door;
2-a waste heat boiler, 21-a vertical body, 22-a vertical serpentine heat exchange tube, 221-a steel strip, 23-a steam drum, 231-a centralized downcomer, 232-a steam outlet tube seat and 24-a steam-water separator;
3-an air preheater, 31-an external frame, 32-a vertical heat exchange tube, 33-a cold air inlet, 34-a hot air outlet, 35-an air pipeline, 36-a horizontal tube plate, 37-a turbulence strip and 38-an expansion joint;
4-a flue gas duct;
5-smoke collecting cavity, 51-smoke outlet;
→ direction of smoke passage.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "bottom", "top", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only terms of relationships determined for convenience in describing structural relationships of the components or elements of the present invention, and do not particularly indicate any components or elements of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "connected" and "connecting" should be interpreted broadly, and mean either a fixed connection or an integral connection or a detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
The invention is further illustrated with reference to the following figures and examples.
Example 1:
as shown in fig. 1, an energy-saving and environment-friendly heat transfer oil boiler comprises a boiler main machine 1, a waste heat boiler 2 and an air preheater 3;
the waste heat boiler 2 comprises a vertical body 21; a plurality of rows of vertical serpentine heat exchange tubes 22 are arranged in the vertical body 21, straight tube sections of the vertical serpentine heat exchange tubes 22 are in an upward inclined state along the flowing direction of media in the vertical serpentine heat exchange tubes 22, and the inclined tube bundles are arranged, so that steam in a steam-water mixture generated in the vertical serpentine heat exchange tubes 22 can quickly enter the steam pocket 23 at the upper part, and the situation that a large amount of steam is accumulated in the vertical serpentine heat exchange tubes 22 when the boiler is in operation to influence the safe operation of the boiler is prevented; an outlet at the upper part of the vertical type serpentine heat exchange tube 22 is communicated with a steam drum 23, wherein the steam drum 23 is connected with the side wall of the vertical type body 21 through a support; a concentrated downcomer 231 is arranged at the bottom of the steam drum 23, the concentrated downcomer 231 is communicated with the lower inlet of the vertical serpentine heat exchange tube 22 through a lower water header, a steam outlet tube seat 232 is arranged at the top of the steam drum 23, and the steam outlet tube seat 232 is connected with the steam-water separator 24, so that high-quality dry saturated steam is finally provided for a user; a water inlet pipe is arranged on the side wall of the steam pocket 23, and medium water is provided for the vertical type serpentine heat exchange pipe 22 through the water inlet pipe;
the waste heat boiler 2 is a primary energy-saving device, smoke flows out of the vertical serpentine heat exchange tube 22, and medium water flows in the vertical serpentine heat exchange tube 22; the water circulation in the vertical serpentine heat exchange tube 22 is a natural circulation mode, the flue gas brushes the heating surface from top to bottom outside the vertical serpentine heat exchange tube 22, after the steam-water mixture in the vertical serpentine heat exchange tube 22 is heated, the density is reduced, the steam flows upwards and enters the steam drum 23, the steam in the steam is discharged along the steam outlet tube 232, the water in the steam flows downwards along the concentrated descending tube 231 and enters the bottom inlet of the vertical serpentine heat exchanger 22 again, and the water in the vertical serpentine heat exchange tube 22 is naturally circulated by utilizing the pressure difference generated by the density difference of cold water and hot water.
As shown in fig. 3, the air preheater 3 includes an external frame 31, and a plurality of vertical heat exchange tubes 32 are disposed inside the external frame 31;
a flue gas outlet 11 of the boiler main body 1 is connected with a flue gas inlet at the top of the waste heat boiler 2 through a flue gas pipeline 4; a flue gas outlet at the bottom of the waste heat boiler 2 is communicated with a vertical heat exchange tube 32 in the air preheater 3; a smoke outlet at the bottom of the air preheater 3 is communicated with a smoke collection cavity 5, and one side of the smoke collection cavity 5 is provided with a smoke outlet 51;
a cold air inlet 33 and a hot air outlet 34 are respectively arranged at two sides of the air preheater 3; the hot air outlet 34 is communicated with an air inlet of a burner in the boiler main machine 1 through an air pipeline 35; specifically, cold air enters the cold air inlet 33 through a blower;
in the application, the air preheater 3 is a secondary energy-saving device, smoke in the air preheater 3 is longitudinally flushed in the vertical heat exchange tube 32, air is transversely flushed outside the vertical heat exchange tube 32 to complete heat exchange, and the air heated by the smoke is supplied to the burner, so that fuel is saved; simultaneously in this application flue gas reentrant air heater 3 after 2 for air heating in, exhaust-heat boiler 2 makes its follow-up flue gas temperature that gets into air heater 3 not be higher than 180 ℃ to the consumption of exhaust-heat boiler 2 to flue gas temperature makes the air temperature that enters into in the boiler host 1 combustor not higher than 100 ℃, thereby prevents the production of nitrogen oxide when the combustor moves, realizes the low-nitrogen combustion, reduces nitrogen oxide's emission, reaches the environmental protection requirement.
Therefore, this application sets up exhaust-heat boiler 2, air heater 3's two-stage economizer through the tail end at boiler host 1, carries out recycle to the waste heat in the boiler host computer exhanst gas outlet flue gas, can effectual reduction boiler's final exhaust gas temperature, makes the final exhaust gas temperature of boiler (the exhaust gas temperature of exhaust fume outlet 51 on smoke collecting cavity 5) not higher than 100 ℃, and one-level economizer exhaust-heat boiler 2's setting can provide the used partial steam of production and life for the user simultaneously, has improved the thermal efficiency of boiler greatly.
Preferably, the straight tube sections of the vertical serpentine heat exchange tube 22 are spirally wound with steel strips 221, so as to increase the heating surface and improve the heat transfer efficiency.
Preferably, the inclination angle of the straight pipe section of the vertical type snakelike heat exchange pipe 22 is 3-5 degrees, and steam and water in the pipe are prevented from being layered to influence the safe operation of the boiler.
Preferably, the other end of the steam outlet pipe base 232 is connected with the inlet of the external steam-water separator 24; an external steam-water separation device 24 is arranged outside the steam drum 23, so that liquid drops in the steam are effectively separated, and the quality of the steam is improved.
Preferably, a water outlet pipe at the bottom of the steam-water separator 24 is communicated with the interior of the steam drum 23; the hot water separated by the steam-water separator 24 is recovered.
Preferably, the air preheater 3 is positioned at the bottom of the waste heat boiler 2; the smoke collection cavity 5 is positioned at the bottom of the air preheater 3; namely, the waste heat boiler 2, the air preheater 3 and the smoke collecting cavity 5 are of vertical structures from top to bottom, so that the occupied area is small, and the space is saved.
Example 2:
on the basis of the embodiment 1, as shown in fig. 3, the top and the bottom of the air preheater 3 are respectively and fixedly provided with a horizontal tube plate 36; the two ends of the vertical heat exchange tubes 32 penetrate through the corresponding horizontal tube plates 36 and are fixedly connected with the horizontal tube plates 36; the lower horizontal tube sheet 36 is connected to the outer frame 31, and the upper horizontal tube sheet 36 is connected to the outer frame 31 via an expansion joint 38.
Wherein, the top of the vertical heat exchange tube 32 is communicated with the flue gas outlet of the waste heat boiler 2, and the bottom of the vertical heat exchange tube 32 is communicated with the smoke collecting cavity 5; the horizontal tube sheet 36 is provided for mounting the vertical heat exchange tubes 32 on the one hand and also for separating the flow-through chamber for air from the flue gas flow-through chamber inside the vertical heat exchange tubes 32 on the other hand.
Preferably, a spoiler strip 37 in a spring wire shape is arranged in the vertical heat exchange tube 32; the turbulator strips 37 extend from the upper end to the bottom end of the vertical heat exchange tube 32.
In the application, the spoiler strips 37 are convenient to install, and workers can directly insert the molded spoiler strips 37 into the vertical heat exchange tube 32, so that the spoiler strips 37 are clamped in the vertical heat exchange tube 32; the arrangement of the turbulence strips 37 in the vertical heat exchange tube 32 changes the flowing state of the flue gas in the tube, strengthens the heat exchange process and ensures that the heat exchange is more sufficient.
Example 3:
on the basis of the embodiment 1 or the embodiment 2, as shown in fig. 2, the main boiler 1 is arranged horizontally, a burner 12 is arranged at the front part of the main boiler 1, and a flue gas outlet 11 is arranged at the tail part of the main boiler 1;
a spiral inner coil 13 and a spiral outer coil 14 are arranged in the boiler main machine 1; the spiral inner coil 13 encloses a hearth 15, a first convection channel 16 is enclosed between the spiral inner coil 13 and the spiral outer coil 14, and a second convection channel 17 is enclosed between the spiral outer coil 14 and the shell of the boiler main unit 1; specifically, inlets of the spiral inner coil 13 and the spiral outer coil 14 are respectively communicated with an external oil inlet pipe, and outlets of the spiral inner coil 13 and the spiral outer coil 14 are respectively communicated with an external oil outlet pipe; the fixing of the spiral inner coil 13 and the spiral outer coil 14 inside the boiler main body 1 can be realized by the prior art, and are usually fixed on the casing of the boiler main body 1 through the distance tube 18.
In the application, the boiler main unit 1 adopts the spiral coil as a main heating surface to form a three-pass structure, fuel is combusted in a hearth 15 enclosed by the spiral inner coil 13, and high-temperature flue gas at an outlet of the hearth 15 firstly flows through a first convection channel 16 formed by the spiral inner coil 13 and the spiral outer coil 14, then flows through a second convection channel 17 formed by the spiral outer coil 14 and a shell of the boiler main unit 1, and enters the waste heat boiler 2 through the flue gas outlet 11.
Preferably, the inner wall of the front part of the boiler main unit 1 is coated with refractory mortar 19, and the wall surface of the front part of the boiler main unit 1 is provided with a plurality of heat-insulating layers, so that heat loss is reduced.
Preferably, the tail part of the boiler main body 1 is provided with a smoke barrier 110; the smoke barrier 110 and the rear end cover of the boiler main body 1 form a rear smoke chamber 111, and the rear smoke chamber 111 is communicated with the second convection channel 17 and the smoke outlet 11.
On one hand, the arrangement of the smoke partition wall 110 promotes the smoke to circulate along the circulation sequence of the hearth 15, the first convection channel 16 and the second convection channel 17, so that the sufficient heat exchange with the heat conducting oil in the coil pipe is realized; on the other hand, the surface temperature of the rear smoke box is reduced, and the heat dissipation loss of the boiler is reduced.
Preferably, an explosion vent 112 is arranged on a rear end cover of the boiler main body 1, so that safe operation of the boiler is ensured.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the present invention, and it should be understood by those skilled in the art that various modifications and changes may be made without inventive efforts based on the technical solutions of the present invention.
Claims (10)
1. An energy-saving environment-friendly heat conduction oil boiler is characterized by comprising a boiler main machine, a waste heat boiler and an air preheater;
the waste heat boiler comprises a vertical body; a plurality of rows of vertical snake-shaped heat exchange tubes are arranged in the vertical body, and straight tube sections of the vertical snake-shaped heat exchange tubes are in an upward inclined state along the flowing direction of media in the vertical snake-shaped heat exchange tubes; an outlet at the upper part of the vertical type serpentine heat exchange tube is communicated with the steam pocket; the bottom of the steam drum is provided with a centralized downcomer which is communicated with the lower inlet of the vertical serpentine heat exchange tube through a lower water collection tank, the top of the steam drum is provided with a steam outlet tube seat, and the side wall of the steam drum is provided with a water inlet tube;
the air preheater comprises an external frame, and a plurality of vertical heat exchange tubes are arranged in the external frame;
a flue gas outlet of the boiler main machine is connected with a flue gas inlet at the top of the waste heat boiler through a flue gas pipeline; a flue gas outlet at the bottom of the waste heat boiler is communicated with a vertical heat exchange tube in the air preheater; a smoke outlet at the bottom of the air preheater is communicated with a smoke collection cavity, and a smoke outlet is arranged at one side of the smoke collection cavity;
a cold air inlet and a hot air outlet are respectively arranged at two sides of the air preheater; and the hot air outlet is communicated with an air inlet of a burner in the boiler main machine through an air pipeline.
2. The energy-saving environment-friendly conduction oil boiler as claimed in claim 1, wherein the straight tube sections of the vertical serpentine heat exchange tube are spirally wound with steel strips.
3. The energy-saving environment-friendly heat transfer oil boiler as claimed in claim 1, wherein the inclination angle of the straight tube section of the vertical serpentine heat exchange tube is 3-5 °.
4. The energy-saving environment-friendly conduction oil boiler as claimed in claim 1, wherein the other end of the steam outlet pipe seat is connected with an inlet of an external steam-water separator; and a water outlet pipe at the bottom of the steam-water separator is communicated with the interior of the steam drum.
5. The energy-saving environment-friendly conduction oil boiler according to claim 1, wherein the air preheater is located at the bottom of the waste heat boiler; the smoke collection cavity is positioned at the bottom of the air preheater.
6. The energy-saving environment-friendly conduction oil boiler according to claim 1, wherein horizontal tube plates are fixedly arranged at the top and the bottom of the air preheater respectively; two ends of the vertical heat exchange tube penetrate through the corresponding horizontal tube plate and are fixedly connected with the horizontal tube plate; the horizontal tube plate at the lower part is connected with the outer frame, and the horizontal tube plate at the upper part is connected with the outer frame through an expansion joint.
7. The energy-saving environment-friendly conduction oil boiler as claimed in claim 1, wherein a spoiler strip in a spring wire shape is arranged in the vertical heat exchange tube; the flow disturbing strips extend from the upper end to the bottom end of the vertical heat exchange tube.
8. The energy-saving environment-friendly heat transfer oil boiler as claimed in claim 1, wherein the boiler main machine is arranged horizontally, a burner is arranged at the front part of the boiler main machine, and a flue gas outlet is arranged at the tail part of the boiler main machine;
a spiral inner coil and a spiral outer coil are arranged in the boiler main machine; the spiral inner coil pipe encloses a hearth, a first convection channel is enclosed between the spiral inner coil pipe and the spiral outer coil pipe, and a second convection channel is enclosed between the spiral outer coil pipe and a shell of the boiler main machine.
9. The energy-saving environment-friendly conduction oil boiler as claimed in claim 8, wherein the inner wall of the front part of the main boiler body is coated with refractory mortar, and the wall surface of the front part of the main boiler body is provided with a plurality of layers of heat preservation layers.
10. The energy-saving environment-friendly heat transfer oil boiler as claimed in claim 8, wherein a smoke barrier is arranged at the tail of the boiler main body; the smoke partition wall and the rear end cover of the boiler main machine form a rear smoke chamber, and the rear smoke chamber is communicated with the second convection channel and the smoke outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741412.6A CN111765635A (en) | 2020-07-29 | 2020-07-29 | Energy-saving environment-friendly heat conduction oil boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741412.6A CN111765635A (en) | 2020-07-29 | 2020-07-29 | Energy-saving environment-friendly heat conduction oil boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111765635A true CN111765635A (en) | 2020-10-13 |
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| CN202010741412.6A Pending CN111765635A (en) | 2020-07-29 | 2020-07-29 | Energy-saving environment-friendly heat conduction oil boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325661A (en) * | 2020-11-02 | 2021-02-05 | 南京玻璃纤维研究设计院有限公司 | Kiln waste heat utilization device |
| CN113432299A (en) * | 2021-07-14 | 2021-09-24 | 台州市旭源石油化工有限公司 | Efficient energy-saving boiler and control method thereof |
| CN114562717A (en) * | 2022-03-28 | 2022-05-31 | 江苏海德利热能设备制造有限公司 | Straight-flow coil pipe boiler structure |
-
2020
- 2020-07-29 CN CN202010741412.6A patent/CN111765635A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325661A (en) * | 2020-11-02 | 2021-02-05 | 南京玻璃纤维研究设计院有限公司 | Kiln waste heat utilization device |
| CN113432299A (en) * | 2021-07-14 | 2021-09-24 | 台州市旭源石油化工有限公司 | Efficient energy-saving boiler and control method thereof |
| CN114562717A (en) * | 2022-03-28 | 2022-05-31 | 江苏海德利热能设备制造有限公司 | Straight-flow coil pipe boiler structure |
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