WO2023134298A1 - Secondary heat exchanger for gas heating furnace - Google Patents

Secondary heat exchanger for gas heating furnace Download PDF

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Publication number
WO2023134298A1
WO2023134298A1 PCT/CN2022/132830 CN2022132830W WO2023134298A1 WO 2023134298 A1 WO2023134298 A1 WO 2023134298A1 CN 2022132830 W CN2022132830 W CN 2022132830W WO 2023134298 A1 WO2023134298 A1 WO 2023134298A1
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WO
WIPO (PCT)
Prior art keywords
flue gas
heat exchange
water
shell
exchange tube
Prior art date
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PCT/CN2022/132830
Other languages
French (fr)
Chinese (zh)
Inventor
赵帅
刘云
刘克
Original Assignee
青岛经济技术开发区海尔热水器有限公司
海尔智家股份有限公司
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Application filed by 青岛经济技术开发区海尔热水器有限公司, 海尔智家股份有限公司 filed Critical 青岛经济技术开发区海尔热水器有限公司
Publication of WO2023134298A1 publication Critical patent/WO2023134298A1/en

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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
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • 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
    • 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
    • F24H9/0005—Details for water heaters
    • 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
    • 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
    • F28D7/1615—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 the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
    • F28D7/1623—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 the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

Definitions

  • the invention belongs to the field of heat exchangers, in particular to a secondary heat exchanger for a gas heating furnace.
  • the secondary heat exchanger of the existing gas-fired heating furnace is affected by factors such as the internal structure and the speed and direction of flue gas flow.
  • the flow inside the secondary heat exchanger is not uniform, and it is easy to form a flow dead zone, resulting in secondary
  • the heat exchange of the secondary heat exchanger is uneven, the heat exchanger cannot be fully utilized, and the overall heat exchange efficiency is not high.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a secondary heat exchanger for a gas heating furnace, so that the flue gas flows through more heat exchange tubes in the cavity of the secondary heat exchanger.
  • the flow is more uniform, improving heat transfer efficiency.
  • a secondary heat exchanger for a gas heating furnace comprising a shell, an inner water box, a heat exchange tube, a water inlet port, a water outlet port, a flue gas rectifying plate, and a shell, which is provided with a flue gas inlet connected to the inner cavity of the shell and The flue gas outlet;
  • the flue gas rectifying plate which is provided with a plurality of through holes, and the flue gas rectifying plate divides the inner cavity of the shell into multiple chambers;
  • the heat exchange tube includes a plurality of heat exchange tubes, and the outer side of a part of the heat exchange tube The outer end of the heat exchange tube is connected with the water inlet port, the outer end of the other part of the heat exchange tube is connected with the water outlet port, and the inner end of all the heat exchange tubes is connected with the inner water box; the two parts of the heat exchange tube are respectively located in two different compartments .
  • the inlet and outlet water box includes a water inlet chamber and an outlet chamber that are independent of each other. Then communicate with the water inlet interface, the inner end communicates with the inner water box, the outer end of the other part of the heat exchange tube is connected with the water outlet cavity and then communicates with the water outlet interface, and the inner end communicates with the inner water box.
  • the water inlet and outlet water boxes By setting the water inlet and outlet water boxes, and the water inlet and outlet water boxes are divided into independent water inlet chambers and water outlet chambers, in this way, the water coming in from the water inlet interface first enters the water inlet chamber of the water inlet and outlet water box, and then enters into the water inlet chamber.
  • the water entering the heat exchange tubes can be uniform, and the problem of insufficient water flow in the heat exchange tubes will not occur.
  • the water coming out of the heat exchange tube first enters the water outlet chamber of the water inlet and outlet water box, and then flows from the water outlet chamber to the water outlet interface. The problem of poor water outlet from the heat exchange tube.
  • all the heat exchange tubes are arranged in parallel to form a heat exchange tube bundle, the heat exchange tube connected to the water inlet chamber is at the upper part of the shell inner cavity, and the heat exchange tube connected to the water outlet cavity is at the lower part of the shell inner cavity, and the two parts exchange heat
  • the tubes are separated by flue gas straightening plates.
  • a plurality of heat exchange tubes are arranged in parallel, so that the flue gas can pass through the gaps of the heat exchange tubes smoothly to heat the heat exchange tubes.
  • the multiple heat exchange tubes are divided into two parts, one part is the water inlet heat exchange tube connected to the water inlet cavity, the other part is the water outlet heat exchange tube connected to the water outlet cavity, and the heat exchange tube connected to the water inlet cavity is in the upper part of the inner cavity of the shell, and
  • the heat exchange tube connected to the water outlet chamber is in the lower part of the shell inner cavity, and the flue gas entering the shell inner cavity from the lower flue gas inlet can first heat the water outlet heat exchange tube at the lower part of the shell inner cavity, and the water in the water outlet heat exchange tube As the temperature increases, the temperature of the flue gas that loses part of the heat decreases, and the flue gas flows upwards further, and then heats the water in the water inlet heat exchange tube at the upper part of the inner cavity of the shell to increase the temperature of the water in the water inlet heat exchange tube.
  • the flue gas can first gather in the lower part of the shell cavity to fully heat the outlet water heat exchange tube to increase its temperature, then flow through the flue gas rectification plate and then flow upward into the shell The upper part of the chamber heats the water inlet heat exchange tube. Because of the existence of the flue gas rectifying plate, the flow of flue gas will be blocked and can be gathered in the lower part of the shell cavity first, and then flow upward through the holes of the flue gas rectifying plate, realizing the long-term contact exchange with the outlet water heat exchange tube hot.
  • an opening is provided on one side of the shell, and the inner water box and the heat exchange tube are pushed into the inner cavity of the shell through the opening on one side of the shell, and the water inlet and outlet boxes are detachably fixed on the shell, and the water inlet and outlet boxes close this part of the shell. Side opening.
  • the shell needs to be closed so that the flue gas enters the inner cavity of the shell from the flue gas inlet to heat the water in the heat exchange tube, and then the flue gas is discharged from the flue gas outlet, so the inner water box and heat exchange tube are installed in the shell
  • the inlet and outlet water box is detachably fixed on the shell and the water inlet and outlet box closes the side opening of the shell, so that the inner water box and the heat exchange tube can be sealed in the inner cavity of the shell.
  • a sealing ring is also provided, so that the sealing effect is better when the water inlet and outlet water box closes the opening on this side of the shell.
  • the smoke rectifying plate includes a lower vertical plate, a middle horizontal plate, an upper vertical plate and an upper inclined plate, one side of the middle horizontal plate is connected to the top of the lower vertical plate, and the other side of the middle horizontal plate is connected to the bottom of the upper vertical plate end.
  • One end of the upper inclined plate is connected to the top of the upper vertical plate, and the other end of the upper inclined plate extends to the side away from the smoke inlet.
  • the heat exchange tube is divided into upper and lower parts.
  • One end of the upper sloping plate is connected to the top of the upper vertical plate, and the other end of the upper sloping plate extends to the side away from the smoke inlet. This structure makes the smoke flow to the rear end of the shell cavity after entering from the smoke inlet.
  • the flue gas flows to the rear end of the water inlet heat exchange pipe and is discharged from the rear end to the flue gas outlet, so that the rear end of the water outlet heat exchange pipe and the water inlet heat exchanger
  • the rear end of the heat pipe can be heated by flue gas flow, and no local stagnant space will be formed to cause low heating efficiency, so that the flue gas can flow smoothly and the heat exchange efficiency can be improved.
  • the lower vertical plate, the middle horizontal plate and the upper vertical plate of the flue gas rectifying plate are all provided with a plurality of holes.
  • the shell chamber where the water outlet heat exchange tube is located part of the flue gas flows upward through the hole in the middle horizontal plate and enters the shell chamber where the water inlet heat exchange tube is located, and the other part of the smoke flows To the rear end of the water outlet heat exchange tube, it flows upwards to enter the space formed by the upper vertical plate and the upper inclined plate, and then enters the shell chamber where the water inlet heat exchange tube is located through the hole on the upper vertical plate, so that the flue gas flows to The rear end of the water inlet heat exchange tube is discharged from the rear end to the flue gas outlet, so that both the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube can have flue gas flow for heating, and no local stagnation will be formed.
  • the space reduces the heating efficiency, so that the flue gas can flow smoothly and the heat exchange efficiency can be improved.
  • Such a structural design makes it flow upwards to enter the space formed by the upper vertical plate and the upper inclined plate, and can flow smoothly along the oblique angle of the upper inclined plate through the hole of the upper vertical plate and then enter the shell cavity where the water inlet heat exchange tube is located. Indoors, the flow of flue gas is used without forming a local non-flow of flue gas.
  • the lower vertical plate of the flue gas rectifying plate is adjacent to and faces the flue gas inlet.
  • the lower vertical plate of the flue gas rectifying plate is close to and faces the flue gas inlet, but the area of the lower vertical plate is larger than the diameter of the flue gas inlet, so in order to make the flue gas flow into the outlet water more evenly after entering the shell chamber from the flue gas inlet
  • the shell chamber where the heat exchange tube is located there are multiple rows of holes on the lower vertical plate.
  • the holes in the middle of each row of holes have a small diameter, and the holes on both sides have large diameters. In this way, the flue gas can flow into the outlet water evenly for heat exchange.
  • the housing chamber where the tubes are located thus heating evenly.
  • the flue gas In order to allow the flue gas to better enter the shell chamber where the water outlet heat exchange tube is located, there is a certain distance between the lower vertical plate of the flue gas rectifying plate and the flue gas inlet. In this way, the flue gas first enters the space between the flue gas inlet and the lower vertical plate and fills this space. In this way, the area filled by the flue gas in this space is larger than the diameter of the flue gas inlet, and can better enter the place where the outlet water heat exchange tube is located.
  • the outer casing chamber forms a good flue gas flow and heat exchange effect.
  • the flue gas flow channel formed by the structural arrangement enables the flue gas flow to better cover the space where the water outlet heat exchange tube and the water inlet heat exchange tube are located, and heat the water in the heat exchange tube to achieve a better heat exchange effect.
  • the present invention has the following beneficial effects compared with the prior art.
  • a secondary heat exchanger for a gas heating furnace includes a shell, an inner water box, multiple heat exchange tubes, a water inlet port, a water outlet port, and a flue gas rectifying plate.
  • the shell is provided with a flue gas inlet and a flue gas
  • the gas outlet, and the flue gas inlet and flue gas outlet are connected to the inner cavity of the shell, the outer end of a part of the heat exchange tube is connected to the water inlet port, and the inner end is connected to the inner water box; the outer end of the other part of the heat exchange tube is connected to the water outlet port.
  • the inner end communicates with the inner water box, and the flue gas rectifying plate with a plurality of through holes separates the inner cavity of the shell.
  • the flue gas is imported to the flow channel that passes through two separate chambers in sequence and then to the flue gas outlet.
  • the flue gas flows into the inner cavity of the shell from the flue gas inlet, and then flows into the shell chamber where the water outlet heat exchange pipe is located through the hole of the lower vertical plate; enters the water outlet heat exchange pipe
  • the space formed by the upper vertical plate and the upper inclined plate and then enter the shell chamber where the water inlet heat exchange tube is located through the hole on the upper vertical plate, so that the flue gas flows to the rear end of the water inlet heat exchange tube and from The rear end is discharged to the flue gas outlet, so that both the rear end of the water outlet heat
  • Fig. 1 is a schematic diagram of explosion of a secondary heat exchanger of a gas heating furnace of the present invention
  • Fig. 2 is an internal schematic diagram of a secondary heat exchanger of a gas heating furnace of the present invention
  • Fig. 3 is a schematic diagram of a secondary heat exchanger of a gas heating furnace of the present invention.
  • Fig. 4 is a schematic diagram of a flue gas rectifying plate of a secondary heat exchanger of a gas heating furnace according to the present invention
  • Fig. 5 is a schematic diagram of the water circuit structure of a secondary heat exchanger of a gas heating furnace according to the present invention.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.
  • a secondary heat exchanger of a gas heating furnace includes a casing 1, an inner water box 3, a plurality of heat exchange tubes 4, a water inlet port 6, a water outlet port 8 and flue gas rectification plate 5.
  • the shell 1 is provided with a smoke inlet 12 and a smoke outlet 11 , and both the smoke inlet 12 and the smoke outlet 11 communicate with the inner cavity of the shell 1 .
  • the outer end of a part of the heat exchange tubes 4 communicates with the water inlet port 6 , and the inner end communicates with the inner water box 3 ;
  • the flue gas rectifying plate 5 provided with a plurality of through holes separates the inner cavity of the housing.
  • the aforementioned two parts of heat exchange tubes are both located in the inner cavity of the shell, and located in two different compartments; forming a flow path from the flue gas inlet to the flue gas outlet through the two compartments in sequence.
  • a secondary heat exchanger for a gas heating furnace of the present invention further includes a water inlet and outlet water box 7, the water inlet and outlet water box 7 includes a water inlet chamber 9 and a water outlet chamber 10 that are independent of each other, the water inlet chamber 9 is connected to the water inlet interface 6, and the water outlet The chamber 10 is connected to the water outlet port 8, the outer end of a part of the heat exchange tube 4 is connected to the water inlet chamber 9 and then communicated with the water inlet port 6, the inner end is connected to the inner water box 3, and the outer end of the other part of the heat exchange tube 4 is connected to the water outlet chamber 10 Furthermore, it communicates with the water outlet port 8, and the inner end communicates with the inner water box 3.
  • the water coming in from the water inlet interface 6 first enters the water inlet chamber 9 of the water inlet and outlet water box 7, and then enters the In the heat exchange tube 4 connected to the water inlet chamber, the water entering the heat exchange tube can be uniform, and the problem of insufficient water flow in the heat exchange tube will not occur.
  • the water coming out of the heat exchange tube 4 first enters the water outlet cavity 10 of the water inlet and outlet water box 7, and then flows from the water outlet cavity 10 to the water outlet interface 8, so that the heat exchange tube and the water outlet interface 8 will not appear due to the smaller water outlet interface. The problem of poor and uneven water discharge from the heat exchange tube caused by the small connection surface.
  • heat exchange tubes 4 are arranged in parallel to form a heat exchange tube bundle.
  • the heat exchange tubes 4 connected to the water inlet chamber 9 are on the upper part of the inner cavity of the shell, and the heat exchange tubes connected to the water outlet chamber 10 are in the The lower part of the inner cavity of the shell, and the two parts of the heat exchange tube 4 are separated by the flue gas rectifying plate 5 .
  • a plurality of heat exchange tubes 4 are arranged in parallel, so that flue gas can pass smoothly through the gaps of the heat exchange tubes to heat the heat exchange tubes.
  • the multiple heat exchange tubes are divided into two parts, one part is the water inlet heat exchange tube connected to the water inlet cavity, the other part is the water outlet heat exchange tube connected to the water outlet cavity, and the heat exchange tube connected to the water inlet cavity is in the upper part of the inner cavity of the shell, and
  • the heat exchange tube connected to the water outlet chamber is in the lower part of the shell inner cavity, and the flue gas entering the shell inner cavity from the lower flue gas inlet can first heat the water outlet heat exchange tube at the lower part of the shell inner cavity, and the water in the water outlet heat exchange tube As the temperature increases, the temperature of the flue gas that loses part of the heat decreases, and the flue gas flows upwards further, and then heats the water in the water inlet heat exchange tube at the upper part of the inner cavity of the shell to increase the temperature of the water in the water inlet heat exchange tube.
  • the flue gas can first gather in the lower part of the shell cavity to fully heat the outlet water heat exchange tube to increase its temperature, then flow through the flue gas rectification plate and then flow upward into the shell The upper part of the chamber heats the water inlet heat exchange tube. Because of the existence of the flue gas rectifying plate, the flow of flue gas will be blocked and can be gathered in the lower part of the shell cavity first, and then flow upward through the holes of the flue gas rectifying plate, realizing the long-term contact exchange with the outlet water heat exchange tube hot.
  • the shell 1 needs to be closed so that the flue gas enters the inner cavity of the shell from the flue gas inlet 12 to heat the water in the heat exchange tube 4, and then the flue gas is discharged from the flue gas outlet 11, so the inner water box 3 and the heat exchange tube 4
  • the water inlet and outlet water box 7 is detachably fixed on the shell 1 and the water inlet and outlet water box closes the side opening of the shell, so that the inner water box and the heat exchange tube can be sealed in the shell cavity.
  • a sealing ring 2 is also provided, so that the sealing effect is better when the water inlet and outlet water box 7 closes the side opening of the shell.
  • the flue gas rectifying plate 5 includes a lower vertical plate 15, a middle horizontal plate 16, an upper vertical plate 17 and an upper inclined plate 18, one side of the middle horizontal plate 16 is connected to the top of the lower vertical plate 15, and the middle The other side of the horizontal plate 16 is connected to the bottom of the upper vertical plate 17 .
  • One end of the upper inclined plate 18 is connected to the top of the upper vertical plate 17 , and the other end of the upper inclined plate 18 extends to the side away from the smoke inlet 12 .
  • the middle horizontal plate 16 divides all the heat exchange tubes 4 into upper and lower parts.
  • One end of the upper inclined plate 18 is connected to the top of the upper vertical plate, and the other end of the upper inclined plate 18 extends to the side away from the smoke inlet 12.
  • the upper inclined plate 18 is a deflector.
  • Such a structure makes the smoke flow from When the flue gas enters the entrance and flows to the rear end of the shell cavity, it can enter the space formed by the upper vertical plate 17 and the upper inclined plate 18, so that the flue gas flows to the rear end of the water inlet heat exchange tube and is discharged from the rear end to the smoke.
  • the gas outlet makes the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube both have flue gas flow for heating, and will not form a local stagnant space to cause low heating efficiency, so that the flue gas can flow smoothly and The heat exchange efficiency is improved.
  • the lower vertical plate 15 , the middle horizontal plate 16 , and the upper vertical plate 17 of the flue gas rectifying plate 5 are all provided with a plurality of holes as rectifying holes 14 .
  • the lower vertical plate 15, the middle horizontal plate 16, and the upper vertical plate 17 of the flue gas rectifying plate are all provided with a plurality of holes, so that the smoke flows into the inner cavity of the shell from the smoke inlet 12, and then flows into through the holes of the lower vertical plate 15.
  • the flue gas flows to the rear end of the water inlet heat exchange tube and is discharged from the rear end to the flue gas outlet 11, so that both the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube can have flue gas flow. Heating will not form a local stagnant space and cause low heating efficiency, and the flue gas flow can be adjusted by adjusting the rectification hole 14, so that the flue gas flow can be smooth and the heat exchange efficiency can be improved.
  • Such a structural design makes it flow upwards to enter the space formed by the separation of the upper vertical plate 17 and the upper inclined plate 18, and can smoothly flow through the rectifying hole 14 of the upper vertical plate 17 along the oblique angle of the upper vertical plate 18 and then enter the water exchange system.
  • the flow of the flue gas is utilized without forming a local non-flow of the flue gas.
  • the lower vertical plate 15 of the flue gas rectifying plate is adjacent to and faces the flue gas inlet 12, and the lower vertical plate 15 is provided with a plurality of rows of holes as rectifying holes 14, and the diameter of the middle hole of each row of holes is small.
  • the aperture of the side hole is large.
  • the lower vertical plate 15 of the flue gas rectifying plate 5 is adjacent to and faces the flue gas inlet, but the area of the lower vertical plate is larger than the diameter of the flue gas inlet, therefore, in order to make the flue gas enter the shell chamber from the flue gas inlet, it can be more evenly Into the shell chamber where the water outlet heat exchange tube is located, the lower vertical plate 15 is provided with a plurality of rows of holes, the hole diameter of the middle hole of each row of holes is small, and the hole diameter of the holes on both sides is large, so that the flue gas can flow in more evenly The shell chamber where the water outlet heat exchange tube is located, thus heating evenly.
  • the flue gas In order to allow the flue gas to better enter the shell chamber where the water outlet heat exchange tube is located, there is a certain distance between the lower vertical plate 15 of the flue gas rectifying plate 5 and the flue gas inlet 12 . In this way, the flue gas first enters the space between the flue gas inlet and the lower vertical plate and fills this space. In this way, the area filled by the flue gas in this space is larger than the diameter of the flue gas inlet, and can better enter the place where the outlet water heat exchange tube is located.
  • the outer casing chamber forms a good flue gas flow and heat exchange effect.
  • the smoke rectifying plate 5 is installed on the inner side of the housing through a slot.
  • the smoke rectifying plate 5 can be fixed on the water inlet and outlet water box 7 and the inner water box 3 by welding.
  • the whole flue gas rectifying plate 5 can be integrated, and also can be separable between each part.
  • the flue gas rectifying plate 5 is designed with rectifying holes 14, and the flue gas flow can be adjusted by adjusting the position, quantity, and size of the orifices.
  • the middle horizontal plate 16 of the flue gas rectifying plate 5 divides the interior of the secondary heat exchanger into The lower convective heat exchange zone and the upper condensation zone, that is, the lower area of the shell inner cavity where the heat exchange tube connected to the water outlet chamber is located and the upper area of the shell inner cavity where the heat exchange tube 4 connected to the water inlet cavity is located.
  • the flue gas enters the condensation area after being rectified by the rectification hole 14 of the flue gas rectification plate 5, and the temperature of the flue gas decreases after passing through the convection heat exchange area.
  • the surface of the heat exchange tube 4 is lower, the water vapor in the flue gas is more likely to condense, so a condensed water outlet 13 is provided at the bottom of the shell.
  • the heat released by condensation is absorbed by water, which further improves the heat exchange efficiency.
  • a secondary heat exchanger of a gas heating furnace in the present invention has a shell chamber from the flue gas inlet 12 to the lower vertical plate 15 to the heat exchange tube connected to the water outlet cavity 10 to the middle horizontal plate 16, the upper vertical plate 17 and then The flue gas flow path from the shell chamber where the heat exchange tube connected to the water inlet chamber 9 is located to the flue gas outlet 11 .
  • the flue gas flow channel formed by the structural setting enables the flue gas flow to better cover the space where the water outlet heat exchange tube and the water inlet heat exchange tube are located, and heat the water in the heat exchange tube 4 to achieve a better heat exchange effect .
  • the invention relates to a secondary heat exchanger of a gas heating furnace, comprising a shell, an inner water box, a plurality of heat exchange tubes, a water inlet interface, a water outlet interface and a flue gas rectifying plate.
  • a flue gas inlet and a flue gas outlet are arranged on the casing, and both the flue gas inlet and the flue gas outlet communicate with the inner cavity of the casing.
  • the outer end of a part of the heat exchange tube is connected with the water inlet port, and the inner end is connected with the inner water box; the outer end of the other part of the heat exchange tube is connected with the water outlet port, and the inner end is connected with the inner water box.
  • the flue gas rectifying plate provided with a plurality of through holes separates the inner cavity of the housing.
  • the aforementioned two parts of the heat exchange tubes are both located in the inner cavity of the housing and located in two different compartments; forming a flow path from the flue gas inlet to the flue gas outlet through the two compartments in sequence.
  • the invention is a secondary heat exchanger for a gas heating furnace. The flue gas flows into the inner cavity of the shell from the flue gas inlet, and then flows into the shell cavity where the water outlet heat exchange tube is located through the hole of the lower vertical plate; enters the shell cavity where the water outlet heat exchange tube is located.
  • Part of the flue gas flows upward through the holes in the middle horizontal plate and enters the shell chamber where the water inlet heat exchange tube is located, and the other part of the flue gas flows to the rear end of the water outlet heat exchange tube and then flows upward to enter the upper part.
  • the space formed by the vertical plate and the upper inclined plate enters the shell chamber where the water inlet heat exchange tube is located through the hole on the upper vertical plate, so that the flue gas flows to the rear end of the water inlet heat exchange tube and is discharged from the rear end.

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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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Disclosed in the present invention is a secondary heat exchanger for a gas heating furnace, the secondary heat exchanger comprising a housing, an inner side water box, a plurality of heat exchange tubes, a water intake interface, a water output interface and a flue gas adjusting plate, wherein the housing is provided with a flue gas inlet and a flue gas outlet, which are both in communication with an inner cavity of the housing; outer side ends of some heat exchange tubes are in communication with the water intake interface, inner side ends thereof are in communication with the inner side water box, outer side ends of the other heat exchange tubes are in communication with the water output interface, and inner side ends thereof are in communication with the inner side water box; and the flue gas adjusting plate, which is provided with a plurality of through holes, separates the inner cavity of the housing, and the two parts of heat exchange tubes mentioned above are both positioned in the inner cavity of the housing and are in two different separation chambers, so as to form flow passages from the flue gas inlet to the flue gas outlet after sequentially passing through the two separation chambers. By means of the provision of the flue gas adjusting plate, the flue gas flows through more heat exchange tubes in a cavity of the secondary heat exchanger, such that the flow of flue gas in a heat exchange area is more uniform, thus the flue gas can flow smoothly and the heat exchange efficiency is improved.

Description

一种燃气采暖炉二次换热器A secondary heat exchanger for a gas heating furnace 技术领域technical field
本发明属于换热器领域，具体地说，涉及一种燃气采暖炉二次换热器。The invention belongs to the field of heat exchangers, in particular to a secondary heat exchanger for a gas heating furnace.
背景技术Background technique
现有的燃气采暖炉的二次换热器，受内部结构及烟气流动的速度、方向等因素的影响，在二次换热器内部的流动并不均匀，容易形成流动死区，导致二次换热器换热不均匀，换热器无法充分利用，整体换热效率不高。The secondary heat exchanger of the existing gas-fired heating furnace is affected by factors such as the internal structure and the speed and direction of flue gas flow. The flow inside the secondary heat exchanger is not uniform, and it is easy to form a flow dead zone, resulting in secondary The heat exchange of the secondary heat exchanger is uneven, the heat exchanger cannot be fully utilized, and the overall heat exchange efficiency is not high.
有鉴于此特提出本发明。In view of this, the present invention is proposed.
发明内容Contents of the invention
本发明要解决的技术问题在于克服现有技术的不足，提供一种燃气采暖炉二次换热器，使烟气在二次换热器腔内流经更多换热管，在换热区域的流动更加均匀，提供换热效率。The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a secondary heat exchanger for a gas heating furnace, so that the flue gas flows through more heat exchange tubes in the cavity of the secondary heat exchanger. The flow is more uniform, improving heat transfer efficiency.
为解决上述技术问题，本发明采用技术方案的基本构思是：In order to solve the problems of the technologies described above, the present invention adopts the basic idea of technical solution to be:
一种燃气采暖炉二次换热器，包括外壳、内侧水盒、换热管、进水接口、出水接口及烟气整流板，外壳，其上设置有与外壳内腔连通的烟气进口和烟气出口；烟气整流板，其上设置有多个通孔，烟气整流板将外壳内腔分隔成多个腔室；换热管，包括多根换热管，一部分换热管的外侧端与进水接口连通，另一部分换热管的外侧端与出水接口连通，所有换热管的内侧端均与内侧水盒连通；所述两部分换热管分别位于两个不同的分隔腔室内。A secondary heat exchanger for a gas heating furnace, comprising a shell, an inner water box, a heat exchange tube, a water inlet port, a water outlet port, a flue gas rectifying plate, and a shell, which is provided with a flue gas inlet connected to the inner cavity of the shell and The flue gas outlet; the flue gas rectifying plate, which is provided with a plurality of through holes, and the flue gas rectifying plate divides the inner cavity of the shell into multiple chambers; the heat exchange tube includes a plurality of heat exchange tubes, and the outer side of a part of the heat exchange tube The outer end of the heat exchange tube is connected with the water inlet port, the outer end of the other part of the heat exchange tube is connected with the water outlet port, and the inner end of all the heat exchange tubes is connected with the inner water box; the two parts of the heat exchange tube are respectively located in two different compartments .
进一步的，还包括进出水水盒，进出水水盒包括相互独立的进水腔和出水 腔，进水腔连接进水接口，出水腔连接出水接口，一部分换热管外侧端与进水腔连接进而与进水接口连通，内侧端与内侧水盒连通，另一部分换热管外侧端与出水腔连接进而与出水接口连通，内侧端与内侧水盒连通。Further, it also includes an inlet and outlet water box. The inlet and outlet water box includes a water inlet chamber and an outlet chamber that are independent of each other. Then communicate with the water inlet interface, the inner end communicates with the inner water box, the outer end of the other part of the heat exchange tube is connected with the water outlet cavity and then communicates with the water outlet interface, and the inner end communicates with the inner water box.
通过设置进出水水盒，并且进出水水盒分为相互独立的进水腔和出水腔，这样，从进水接口进来的水先进入进出水水盒的进水腔中，再进入与进水腔连接的换热管中，从而使得进入换热管中的水能够均匀，不会出现换热管中进水不畅水量不够的问题。同样，从换热管中出来的水先进入进出水水盒的出水腔中，再从出水腔中流至出水接口，这样不会出现出水接口较小而导致的换热管与其连接面较小而导致的换热管出水不畅不均匀的问题。By setting the water inlet and outlet water boxes, and the water inlet and outlet water boxes are divided into independent water inlet chambers and water outlet chambers, in this way, the water coming in from the water inlet interface first enters the water inlet chamber of the water inlet and outlet water box, and then enters into the water inlet chamber. In the connected heat exchange tubes, the water entering the heat exchange tubes can be uniform, and the problem of insufficient water flow in the heat exchange tubes will not occur. Similarly, the water coming out of the heat exchange tube first enters the water outlet chamber of the water inlet and outlet water box, and then flows from the water outlet chamber to the water outlet interface. The problem of poor water outlet from the heat exchange tube.
进一步的，所有换热管平行排列形成换热管束，与进水腔连接的换热管在外壳内腔的上部，与出水腔连接的换热管在外壳内腔的下部，且两部分换热管由烟气整流板隔离。Further, all the heat exchange tubes are arranged in parallel to form a heat exchange tube bundle, the heat exchange tube connected to the water inlet chamber is at the upper part of the shell inner cavity, and the heat exchange tube connected to the water outlet cavity is at the lower part of the shell inner cavity, and the two parts exchange heat The tubes are separated by flue gas straightening plates.
多根换热管平行排列，这样烟气能够从换热管缝隙中顺利通过，对换热管进行加热。多根换热管分成两部分，一部分为进水换热管与进水腔连接，一部分为出水换热管与出水腔连接，与进水腔连接的换热管在外壳内腔的上部，与出水腔连接的换热管在外壳内腔的下部，从下部的烟气进口进入外壳内腔的烟气能先对外壳内腔下部的出水换热管进行加热，将出水换热管中的水温度提高，散失部分热量的烟气温度下降，烟气进一步向上流动，再加热外壳内腔上部的进水换热管中的水进行加热，将进水换热管中水的温度提高。由于两部分换热管由烟气整流板隔离，因此，烟气可以先聚集在外壳内腔下部对出水换热管充分加热使其温度提高，再流经烟气整流板后向上流动进入外壳内腔上部对进水换热管进行加热。因为有烟气整流板的存在，因此，烟气流动会受到阻滞可以 在外壳内腔下部先聚集，再通过烟气整流板的孔向上流动，实现了与出水换热管的长时间接触换热。A plurality of heat exchange tubes are arranged in parallel, so that the flue gas can pass through the gaps of the heat exchange tubes smoothly to heat the heat exchange tubes. The multiple heat exchange tubes are divided into two parts, one part is the water inlet heat exchange tube connected to the water inlet cavity, the other part is the water outlet heat exchange tube connected to the water outlet cavity, and the heat exchange tube connected to the water inlet cavity is in the upper part of the inner cavity of the shell, and The heat exchange tube connected to the water outlet chamber is in the lower part of the shell inner cavity, and the flue gas entering the shell inner cavity from the lower flue gas inlet can first heat the water outlet heat exchange tube at the lower part of the shell inner cavity, and the water in the water outlet heat exchange tube As the temperature increases, the temperature of the flue gas that loses part of the heat decreases, and the flue gas flows upwards further, and then heats the water in the water inlet heat exchange tube at the upper part of the inner cavity of the shell to increase the temperature of the water in the water inlet heat exchange tube. Since the two parts of the heat exchange tube are separated by the flue gas rectification plate, the flue gas can first gather in the lower part of the shell cavity to fully heat the outlet water heat exchange tube to increase its temperature, then flow through the flue gas rectification plate and then flow upward into the shell The upper part of the chamber heats the water inlet heat exchange tube. Because of the existence of the flue gas rectifying plate, the flow of flue gas will be blocked and can be gathered in the lower part of the shell cavity first, and then flow upward through the holes of the flue gas rectifying plate, realizing the long-term contact exchange with the outlet water heat exchange tube hot.
进一步的，外壳一侧设有开口，内侧水盒及换热管从外壳一侧的开口推入外壳内腔中，进出水水盒可拆卸地固定在外壳上且进出水水盒封闭外壳的此侧开口。Further, an opening is provided on one side of the shell, and the inner water box and the heat exchange tube are pushed into the inner cavity of the shell through the opening on one side of the shell, and the water inlet and outlet boxes are detachably fixed on the shell, and the water inlet and outlet boxes close this part of the shell. Side opening.
由于外壳需要封闭，以便让烟气从烟气进口进入外壳内腔后对换热管中的水进行加热，然后烟气从烟气出口排出，故内侧水盒及换热管安装置入外壳内腔时需要有一个开口进入外壳内腔，置入后再封闭此开口。本发明中进出水水盒可拆卸地固定在外壳上且进出水水盒封闭外壳的此侧开口，这样就能将内侧水盒及换热管封闭在外壳内腔中。另外，在开口处为了更好地密封，还设有一个密封圈，从而在进出水水盒封闭外壳的此侧开口时的密封效果更好。Since the shell needs to be closed so that the flue gas enters the inner cavity of the shell from the flue gas inlet to heat the water in the heat exchange tube, and then the flue gas is discharged from the flue gas outlet, so the inner water box and heat exchange tube are installed in the shell There needs to be an opening to enter the inner cavity of the shell when the cavity is inserted, and the opening is closed after being inserted. In the present invention, the inlet and outlet water box is detachably fixed on the shell and the water inlet and outlet box closes the side opening of the shell, so that the inner water box and the heat exchange tube can be sealed in the inner cavity of the shell. In addition, in order to better seal the opening, a sealing ring is also provided, so that the sealing effect is better when the water inlet and outlet water box closes the opening on this side of the shell.
进一步的，烟气整流板包括下部竖板、中部横板、上部竖板及上部斜板，中部横板的一侧连接下部竖板的顶端，中部横板的另一侧连接上部竖板的底端。上部斜板的一端连接上部竖板的顶端，且上部斜板的另一端向背离烟气进口的一侧延伸。Further, the smoke rectifying plate includes a lower vertical plate, a middle horizontal plate, an upper vertical plate and an upper inclined plate, one side of the middle horizontal plate is connected to the top of the lower vertical plate, and the other side of the middle horizontal plate is connected to the bottom of the upper vertical plate end. One end of the upper inclined plate is connected to the top of the upper vertical plate, and the other end of the upper inclined plate extends to the side away from the smoke inlet.
通过设置烟气整流板且将其设置成由下部竖板、中部横板、上部竖板及上部斜板连接的结构，在中部横板上下分别设置上部竖板和下部竖板，中部横板将换热管分成上下两部分。而上部斜板的一端连接上部竖板的顶端，且上部斜板的另一端向背离烟气进口的一侧延伸，这样的结构使得烟气在从烟气进口进入后流向外壳内腔后端上升时，能进入上部竖板和上部斜板分隔形成的空间，这样烟气流至进水换热管的后端且从后端排向烟气出口，使得出水换热管后端及进水换热管后端均能有烟气流动来进行加热，不会形成局部的不流动空间造 成加热效率的低下，从而能够使得烟气流动顺畅且换热效率提高。By setting the flue gas rectifying plate and setting it into a structure connected by the lower vertical plate, the middle horizontal plate, the upper vertical plate and the upper inclined plate, the upper vertical plate and the lower vertical plate are respectively arranged on the middle horizontal plate, and the middle horizontal plate will The heat exchange tube is divided into upper and lower parts. One end of the upper sloping plate is connected to the top of the upper vertical plate, and the other end of the upper sloping plate extends to the side away from the smoke inlet. This structure makes the smoke flow to the rear end of the shell cavity after entering from the smoke inlet. , it can enter the space formed by the upper vertical plate and the upper inclined plate, so that the flue gas flows to the rear end of the water inlet heat exchange pipe and is discharged from the rear end to the flue gas outlet, so that the rear end of the water outlet heat exchange pipe and the water inlet heat exchanger The rear end of the heat pipe can be heated by flue gas flow, and no local stagnant space will be formed to cause low heating efficiency, so that the flue gas can flow smoothly and the heat exchange efficiency can be improved.
进一步的，烟气整流板的下部竖板、中部横板、上部竖板上均设置有多个孔。Further, the lower vertical plate, the middle horizontal plate and the upper vertical plate of the flue gas rectifying plate are all provided with a plurality of holes.
在烟气整流板的下部竖板、中部横板、上部竖板上均设置有多个孔，这样烟气从烟气进口流入外壳内腔，再经下部竖板的孔流入出水换热管所在的外壳腔室；进入出水换热管所在外壳腔室的烟气，其中一部分烟气再向上流经中部横板上的孔，进入进水换热管所在的外壳腔室内，另一部分烟气流动至出水换热管后端再向上流动至进入上部竖板和上部斜板分隔形成的空间，再经上部竖板上的孔进入进水换热管所在的外壳腔室内，这样烟气就流至进水换热管的后端且从后端排向烟气出口，使得出水换热管后端及进水换热管后端均能有烟气流动来进行加热，不会形成局部的不流动空间造成加热效率的低下，从而能够使得烟气流动顺畅且换热效率提高。There are multiple holes on the lower vertical plate, middle horizontal plate and upper vertical plate of the flue gas rectifying plate, so that the flue gas flows into the inner cavity of the shell from the flue gas inlet, and then flows into the outlet water through the holes of the lower vertical plate where the heat exchange tube is located. The shell chamber where the water outlet heat exchange tube is located; part of the flue gas flows upward through the hole in the middle horizontal plate and enters the shell chamber where the water inlet heat exchange tube is located, and the other part of the smoke flows To the rear end of the water outlet heat exchange tube, it flows upwards to enter the space formed by the upper vertical plate and the upper inclined plate, and then enters the shell chamber where the water inlet heat exchange tube is located through the hole on the upper vertical plate, so that the flue gas flows to The rear end of the water inlet heat exchange tube is discharged from the rear end to the flue gas outlet, so that both the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube can have flue gas flow for heating, and no local stagnation will be formed. The space reduces the heating efficiency, so that the flue gas can flow smoothly and the heat exchange efficiency can be improved.
进一步的，上部斜板背离烟气进口的一侧端向下延伸。Further, the side end of the upper inclined plate away from the flue gas inlet extends downward.
这样的结构设计，使得向上流动至进入上部竖板和上部斜板分隔形成的空间，能顺着上部斜板的斜角顺利流经上部竖板的孔后进入进水换热管所在的外壳腔室内，利用烟气的流动，而不会形成局部的烟气不流动。Such a structural design makes it flow upwards to enter the space formed by the upper vertical plate and the upper inclined plate, and can flow smoothly along the oblique angle of the upper inclined plate through the hole of the upper vertical plate and then enter the shell cavity where the water inlet heat exchange tube is located. Indoors, the flow of flue gas is used without forming a local non-flow of flue gas.
进一步的，烟气整流板的下部竖板邻近且面向烟气进口，下部竖板上设置有多行孔，每行孔中部孔的孔径小，两侧孔的孔径大。Further, the lower vertical plate of the flue gas rectifying plate is adjacent to and faces the flue gas inlet. There are multiple rows of holes on the lower vertical plate. The holes in the middle of each row of holes have a small diameter and the holes on both sides have large diameters.
由于烟气整流板的下部竖板邻近且面向烟气进口，但下部竖板面积比烟气进口直径大，因此，为了使得烟气从烟气进口进入外壳腔室后，能较为均匀地流入出水换热管所在的外壳腔室，下部竖板上设置有多行孔中，每行孔的中部孔的孔径小，两侧孔的孔径大，这样，能让烟气较为均匀地流入出水换热管所 在的外壳腔室，从而加热均匀。Since the lower vertical plate of the flue gas rectifying plate is close to and faces the flue gas inlet, but the area of the lower vertical plate is larger than the diameter of the flue gas inlet, so in order to make the flue gas flow into the outlet water more evenly after entering the shell chamber from the flue gas inlet In the shell chamber where the heat exchange tube is located, there are multiple rows of holes on the lower vertical plate. The holes in the middle of each row of holes have a small diameter, and the holes on both sides have large diameters. In this way, the flue gas can flow into the outlet water evenly for heat exchange. The housing chamber where the tubes are located, thus heating evenly.
进一步的，烟气整流板的下部竖板与烟气进口之间有一定距离。Further, there is a certain distance between the lower vertical plate of the flue gas rectifying plate and the flue gas inlet.
为了能使烟气更好地进入出水换热管所在的外壳腔室，烟气整流板的下部竖板与烟气进口之间有一定距离。这样，烟气先进入烟气进口与下部竖板之间并充斥这个空间，这样烟气在此空间内所充斥的面积较烟气进口的直径要大，能更好地进入出水换热管所在的外壳腔室，形成良好的烟气流动和换热效果。In order to allow the flue gas to better enter the shell chamber where the water outlet heat exchange tube is located, there is a certain distance between the lower vertical plate of the flue gas rectifying plate and the flue gas inlet. In this way, the flue gas first enters the space between the flue gas inlet and the lower vertical plate and fills this space. In this way, the area filled by the flue gas in this space is larger than the diameter of the flue gas inlet, and can better enter the place where the outlet water heat exchange tube is located. The outer casing chamber forms a good flue gas flow and heat exchange effect.
进一步的，具有从烟气进口至下部竖板至与出水腔连接的换热管所在的外壳腔室至中部横板、上部竖板再至与进水腔连接的换热管所在的外壳腔室至烟气出口的烟气流道。Further, it has from the flue gas inlet to the lower vertical plate to the shell chamber where the heat exchange tube connected to the water outlet chamber is located to the middle horizontal plate, the upper vertical plate to the shell chamber where the heat exchange tube connected to the water inlet chamber is located The flue gas flow path to the flue gas outlet.
通过结构设置形成的烟气流道使得烟气流动能更好地覆盖出水换热管及进水换热管所在的空间，对换热管内的水进行加热，实现较好的换热效果。The flue gas flow channel formed by the structural arrangement enables the flue gas flow to better cover the space where the water outlet heat exchange tube and the water inlet heat exchange tube are located, and heat the water in the heat exchange tube to achieve a better heat exchange effect.
采用上述技术方案后，本发明与现有技术相比具有以下有益效果。After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.
本发明所述的一种燃气采暖炉二次换热器，包括外壳、内侧水盒、多根换热管、进水接口、出水接口及烟气整流板，外壳上设置有烟气进口和烟气出口，且烟气进口和烟气出口均与外壳内腔连通，一部分换热管外侧端与进水接口连通，内侧端与内侧水盒连通；另一部分换热管外侧端与出水接口连通，内侧端与内侧水盒连通，设置有多个通孔的烟气整流板将外壳内腔分隔，前述两部分换热管均位于外壳内腔中，且位于两个不同的分隔腔室内，形成从烟气进口至依次经两个分隔腔室后再至烟气出口的流道。本发明所述的一种燃气采暖炉二次换热器，烟气从烟气进口流入外壳内腔，再经下部竖板的孔流入出水换热管所在的外壳腔室；进入出水换热管所在外壳腔室的烟气，其中一部分烟气再向上流经中部横板上的孔，进入进水换热管所在的外壳腔室内，另一部分烟气流 动至出水换热管后端再向上流动至进入上部竖板和上部斜板分隔形成的空间，再经上部竖板上的孔进入进水换热管所在的外壳腔室内，这样烟气就流至进水换热管的后端且从后端排向烟气出口，使得出水换热管后端及进水换热管后端均能有烟气流动来进行加热，使烟气在二次换热器腔内流经更多换热管，在换热区域的流动更加均匀，从而能够使得烟气流动顺畅且换热效率提高。A secondary heat exchanger for a gas heating furnace according to the present invention includes a shell, an inner water box, multiple heat exchange tubes, a water inlet port, a water outlet port, and a flue gas rectifying plate. The shell is provided with a flue gas inlet and a flue gas The gas outlet, and the flue gas inlet and flue gas outlet are connected to the inner cavity of the shell, the outer end of a part of the heat exchange tube is connected to the water inlet port, and the inner end is connected to the inner water box; the outer end of the other part of the heat exchange tube is connected to the water outlet port. The inner end communicates with the inner water box, and the flue gas rectifying plate with a plurality of through holes separates the inner cavity of the shell. The flue gas is imported to the flow channel that passes through two separate chambers in sequence and then to the flue gas outlet. In the secondary heat exchanger of the gas heating furnace according to the present invention, the flue gas flows into the inner cavity of the shell from the flue gas inlet, and then flows into the shell chamber where the water outlet heat exchange pipe is located through the hole of the lower vertical plate; enters the water outlet heat exchange pipe The flue gas in the shell chamber where it is located, part of the flue gas flows upward through the hole in the middle horizontal plate, enters the shell chamber where the water inlet heat exchange tube is located, and the other part of the flue gas flows to the rear end of the water outlet heat exchange tube and then flows upward To enter the space formed by the upper vertical plate and the upper inclined plate, and then enter the shell chamber where the water inlet heat exchange tube is located through the hole on the upper vertical plate, so that the flue gas flows to the rear end of the water inlet heat exchange tube and from The rear end is discharged to the flue gas outlet, so that both the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube can have flue gas flow for heating, so that the flue gas flows through more heat exchange in the secondary heat exchanger cavity The flow in the heat exchange area is more uniform, so that the flue gas can flow smoothly and the heat exchange efficiency can be improved.
下面结合附图对本发明的具体实施方式作进一步详细的描述。The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
附图说明Description of drawings
附图作为本发明的一部分，用来提供对本发明的进一步的理解，本发明的示意性实施例及其说明用于解释本发明，但不构成对本发明的不当限定。显然，下面描述中的附图仅仅是一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图。在附图中：The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute improper limitations to the present invention. Apparently, the drawings in the following description are only some embodiments, and those skilled in the art can obtain other drawings according to these drawings without creative efforts. In the attached picture:
图1是本发明一种燃气采暖炉二次换热器的***示意图；Fig. 1 is a schematic diagram of explosion of a secondary heat exchanger of a gas heating furnace of the present invention;
图2是本发明一种燃气采暖炉二次换热器的内部示意图；Fig. 2 is an internal schematic diagram of a secondary heat exchanger of a gas heating furnace of the present invention;
图3是本发明一种燃气采暖炉二次换热器的示意图；Fig. 3 is a schematic diagram of a secondary heat exchanger of a gas heating furnace of the present invention;
图4是本发明一种燃气采暖炉二次换热器的烟气整流板示意图；Fig. 4 is a schematic diagram of a flue gas rectifying plate of a secondary heat exchanger of a gas heating furnace according to the present invention;
图5是本发明一种燃气采暖炉二次换热器的水路结构示意图。Fig. 5 is a schematic diagram of the water circuit structure of a secondary heat exchanger of a gas heating furnace according to the present invention.
图中：1、外壳 2、密封圈 3、内侧水盒 4、换热管 5、烟气整流板 6、进水接口 7、进出水水盒 8、出水接口 9、进水腔 10、出水腔 11、烟气出口 12、烟气进口 13、冷凝水出口 14、整流孔 15、下部竖板 16、中部横板 17、上部竖板 18、上部斜板。In the figure: 1. Shell 2. Sealing ring 3. Inner water box 4. Heat exchange tube 5. Flue gas rectifying plate 6. Water inlet interface 7. Water inlet and outlet box 8. Water outlet interface 9. Water inlet chamber 10. Water outlet chamber 11. Flue gas outlet 12. Flue gas inlet 13. Condensed water outlet 14. Rectification hole 15. Lower vertical plate 16. Middle horizontal plate 17. Upper vertical plate 18. Upper inclined plate.
需要说明的是，这些附图和文字描述并不旨在以任何方式限制本发明的构 思范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对实施例中的技术方案进行清楚、完整地描述，以下实施例用于说明本发明，但不用来限制本发明的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.
在本发明的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.
结合图1至图5所示，本发明一种燃气采暖炉二次换热器，包括外壳1、内侧水盒3、多根换热管4、进水接口6、出水接口8及烟气整流板5。外壳1上设置有烟气进口12和烟气出口11，且烟气进口12和烟气出口11均与外壳1内腔连通。一部分换热管4外侧端与进水接口6连通，内侧端与内侧水盒3连通；另一部分换热管4外侧端与出水接口8连通，内侧端与内侧水盒3连通。设置有多个通孔的烟气整流板5将外壳内腔分隔。前述两部分换热管均位于外壳内腔中，且位于两个不同的分隔腔室内；形成从烟气进口至依次经两个分隔腔室 后再至烟气出口的流道。As shown in Fig. 1 to Fig. 5, a secondary heat exchanger of a gas heating furnace according to the present invention includes a casing 1, an inner water box 3, a plurality of heat exchange tubes 4, a water inlet port 6, a water outlet port 8 and flue gas rectification plate 5. The shell 1 is provided with a smoke inlet 12 and a smoke outlet 11 , and both the smoke inlet 12 and the smoke outlet 11 communicate with the inner cavity of the shell 1 . The outer end of a part of the heat exchange tubes 4 communicates with the water inlet port 6 , and the inner end communicates with the inner water box 3 ; The flue gas rectifying plate 5 provided with a plurality of through holes separates the inner cavity of the housing. The aforementioned two parts of heat exchange tubes are both located in the inner cavity of the shell, and located in two different compartments; forming a flow path from the flue gas inlet to the flue gas outlet through the two compartments in sequence.
本发明一种燃气采暖炉二次换热器，还包括进出水水盒7，进出水水盒7包括相互独立的进水腔9和出水腔10，进水腔9连接进水接口6，出水腔10连接出水接口8，一部分换热管4外侧端与进水腔9连接进而与进水接口6连通，内侧端与内侧水盒3连通，另一部分换热管4外侧端与出水腔10连接进而与出水接口8连通，内侧端与内侧水盒3连通。A secondary heat exchanger for a gas heating furnace of the present invention further includes a water inlet and outlet water box 7, the water inlet and outlet water box 7 includes a water inlet chamber 9 and a water outlet chamber 10 that are independent of each other, the water inlet chamber 9 is connected to the water inlet interface 6, and the water outlet The chamber 10 is connected to the water outlet port 8, the outer end of a part of the heat exchange tube 4 is connected to the water inlet chamber 9 and then communicated with the water inlet port 6, the inner end is connected to the inner water box 3, and the outer end of the other part of the heat exchange tube 4 is connected to the water outlet chamber 10 Furthermore, it communicates with the water outlet port 8, and the inner end communicates with the inner water box 3.
通过设置进出水水盒7，并且进出水水盒分为相互独立的进水腔和出水腔，这样，从进水接口6进来的水先进入进出水水盒7的进水腔9中，再进入与进水腔连接的换热管4中，从而使得进入换热管中的水能够均匀，不会出现换热管中进水不畅水量不够的问题。同样，从换热管4中出来的水先进入进出水水盒7的出水腔10中，再从出水腔10中流至出水接口8，这样不会出现出水接口8较小而导致的换热管与其连接面较小而导致的换热管出水不畅不均匀的问题。By setting the water inlet and outlet water box 7, and the water inlet and outlet water box is divided into a water inlet chamber and a water outlet chamber independent of each other, like this, the water coming in from the water inlet interface 6 first enters the water inlet chamber 9 of the water inlet and outlet water box 7, and then enters the In the heat exchange tube 4 connected to the water inlet chamber, the water entering the heat exchange tube can be uniform, and the problem of insufficient water flow in the heat exchange tube will not occur. Similarly, the water coming out of the heat exchange tube 4 first enters the water outlet cavity 10 of the water inlet and outlet water box 7, and then flows from the water outlet cavity 10 to the water outlet interface 8, so that the heat exchange tube and the water outlet interface 8 will not appear due to the smaller water outlet interface. The problem of poor and uneven water discharge from the heat exchange tube caused by the small connection surface.
结合图1、2、5所示，所有换热管4平行排列形成换热管束，与进水腔9连接的换热管4在外壳内腔的上部，与出水腔10连接的换热管在外壳内腔的下部，且两部分换热管4由烟气整流板5隔离。As shown in Figures 1, 2, and 5, all heat exchange tubes 4 are arranged in parallel to form a heat exchange tube bundle. The heat exchange tubes 4 connected to the water inlet chamber 9 are on the upper part of the inner cavity of the shell, and the heat exchange tubes connected to the water outlet chamber 10 are in the The lower part of the inner cavity of the shell, and the two parts of the heat exchange tube 4 are separated by the flue gas rectifying plate 5 .
多根换热管4平行排列，这样烟气能够从换热管缝隙中顺利通过，对换热管进行加热。多根换热管分成两部分，一部分为进水换热管与进水腔连接，一部分为出水换热管与出水腔连接，与进水腔连接的换热管在外壳内腔的上部，与出水腔连接的换热管在外壳内腔的下部，从下部的烟气进口进入外壳内腔的烟气能先对外壳内腔下部的出水换热管进行加热，将出水换热管中的水温度提高，散失部分热量的烟气温度下降，烟气进一步向上流动，再加热外壳内腔上部的进水换热管中的水进行加热，将进水换热管中水的温度提高。由于两部分 换热管由烟气整流板隔离，因此，烟气可以先聚集在外壳内腔下部对出水换热管充分加热使其温度提高，再流经烟气整流板后向上流动进入外壳内腔上部对进水换热管进行加热。因为有烟气整流板的存在，因此，烟气流动会受到阻滞可以在外壳内腔下部先聚集，再通过烟气整流板的孔向上流动，实现了与出水换热管的长时间接触换热。A plurality of heat exchange tubes 4 are arranged in parallel, so that flue gas can pass smoothly through the gaps of the heat exchange tubes to heat the heat exchange tubes. The multiple heat exchange tubes are divided into two parts, one part is the water inlet heat exchange tube connected to the water inlet cavity, the other part is the water outlet heat exchange tube connected to the water outlet cavity, and the heat exchange tube connected to the water inlet cavity is in the upper part of the inner cavity of the shell, and The heat exchange tube connected to the water outlet chamber is in the lower part of the shell inner cavity, and the flue gas entering the shell inner cavity from the lower flue gas inlet can first heat the water outlet heat exchange tube at the lower part of the shell inner cavity, and the water in the water outlet heat exchange tube As the temperature increases, the temperature of the flue gas that loses part of the heat decreases, and the flue gas flows upwards further, and then heats the water in the water inlet heat exchange tube at the upper part of the inner cavity of the shell to increase the temperature of the water in the water inlet heat exchange tube. Since the two parts of the heat exchange tube are separated by the flue gas rectification plate, the flue gas can first gather in the lower part of the shell cavity to fully heat the outlet water heat exchange tube to increase its temperature, then flow through the flue gas rectification plate and then flow upward into the shell The upper part of the chamber heats the water inlet heat exchange tube. Because of the existence of the flue gas rectifying plate, the flow of flue gas will be blocked and can be gathered in the lower part of the shell cavity first, and then flow upward through the holes of the flue gas rectifying plate, realizing the long-term contact exchange with the outlet water heat exchange tube hot.
结合图1、2所示，外壳1一侧设有开口，内侧水盒3及换热管4从外壳一侧的开口推入外壳内腔中，进出水水盒7可拆卸地固定在外壳1上且进出水水盒7封闭外壳1的此侧开口。换热管临近此侧开口的一端为外侧端，临近内侧水盒的一端为内侧端。As shown in Figures 1 and 2, there is an opening on one side of the shell 1, the inner water box 3 and the heat exchange tube 4 are pushed into the inner cavity of the shell from the opening on one side of the shell, and the water inlet and outlet box 7 is detachably fixed on the shell 1 The upper and lower water box 7 closes the side opening of the shell 1 . The end of the heat exchange tube adjacent to the side opening is the outer end, and the end adjacent to the inner water box is the inner end.
由于外壳1需要封闭，以便让烟气从烟气进口12进入外壳内腔后对换热管4中的水进行加热，然后烟气从烟气出口11排出，故内侧水盒3及换热管4安装置入外壳内腔时需要有一个开口进入外壳内腔，置入后再封闭此开口。本发明中进出水水盒7可拆卸地固定在外壳1上且进出水水盒封闭外壳的此侧开口，这样就能将内侧水盒及换热管封闭在外壳内腔中。另外，在开口处为了更好地密封，还设有一个密封圈2，从而在进出水水盒7封闭外壳的此侧开口时的密封效果更好。Since the shell 1 needs to be closed so that the flue gas enters the inner cavity of the shell from the flue gas inlet 12 to heat the water in the heat exchange tube 4, and then the flue gas is discharged from the flue gas outlet 11, so the inner water box 3 and the heat exchange tube 4 When the installation is inserted into the inner cavity of the shell, an opening is required to enter the inner cavity of the shell, and the opening is closed after being inserted. In the present invention, the water inlet and outlet water box 7 is detachably fixed on the shell 1 and the water inlet and outlet water box closes the side opening of the shell, so that the inner water box and the heat exchange tube can be sealed in the shell cavity. In addition, in order to better seal the opening, a sealing ring 2 is also provided, so that the sealing effect is better when the water inlet and outlet water box 7 closes the side opening of the shell.
结合图2、4所示，烟气整流板5包括下部竖板15、中部横板16、上部竖板17及上部斜板18，中部横板16的一侧连接下部竖板15的顶端，中部横板16的另一侧连接上部竖板17的底端。上部斜板18的一端连接上部竖板17的顶端，且上部斜板18的另一端向背离烟气进口12的一侧延伸。As shown in Figures 2 and 4, the flue gas rectifying plate 5 includes a lower vertical plate 15, a middle horizontal plate 16, an upper vertical plate 17 and an upper inclined plate 18, one side of the middle horizontal plate 16 is connected to the top of the lower vertical plate 15, and the middle The other side of the horizontal plate 16 is connected to the bottom of the upper vertical plate 17 . One end of the upper inclined plate 18 is connected to the top of the upper vertical plate 17 , and the other end of the upper inclined plate 18 extends to the side away from the smoke inlet 12 .
通过设置烟气整流板5且将其设置成由下部竖板15、中部横板16、上部竖板17及上部斜板18连接的结构，在中部横板上下分别设置上部竖板和下部竖 板，中部横板将全部换热管4分成上下两部分。而上部斜板18的一端连接上部竖板的顶端，且上部斜板18的另一端向背离烟气进口12的一侧延伸，上部斜板18为导流板，这样的结构使得烟气在从烟气进口进入后流向外壳内腔后端上升时，能进入上部竖板17和上部斜板18分隔形成的空间，这样烟气流至进水换热管的后端且从后端排向烟气出口，使得出水换热管后端及进水换热管后端均能有烟气流动来进行加热，不会形成局部的不流动空间造成加热效率的低下，从而能够使得烟气流动顺畅且换热效率提高。By setting the flue gas straightening plate 5 and setting it into a structure connected by the lower vertical plate 15, the middle horizontal plate 16, the upper vertical plate 17 and the upper inclined plate 18, the upper vertical plate and the lower vertical plate are respectively arranged on the middle horizontal plate. , the middle horizontal plate divides all the heat exchange tubes 4 into upper and lower parts. One end of the upper inclined plate 18 is connected to the top of the upper vertical plate, and the other end of the upper inclined plate 18 extends to the side away from the smoke inlet 12. The upper inclined plate 18 is a deflector. Such a structure makes the smoke flow from When the flue gas enters the entrance and flows to the rear end of the shell cavity, it can enter the space formed by the upper vertical plate 17 and the upper inclined plate 18, so that the flue gas flows to the rear end of the water inlet heat exchange tube and is discharged from the rear end to the smoke. The gas outlet makes the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube both have flue gas flow for heating, and will not form a local stagnant space to cause low heating efficiency, so that the flue gas can flow smoothly and The heat exchange efficiency is improved.
如图4所示，烟气整流板5的下部竖板15、中部横板16、上部竖板17上均设置有多个孔作为整流孔14。As shown in FIG. 4 , the lower vertical plate 15 , the middle horizontal plate 16 , and the upper vertical plate 17 of the flue gas rectifying plate 5 are all provided with a plurality of holes as rectifying holes 14 .
在烟气整流板的下部竖板15、中部横板16、上部竖板17上均设置有多个孔，这样烟气从烟气进口12流入外壳内腔，再经下部竖板15的孔流入出水换热管所在的外壳腔室；进入出水换热管所在外壳腔室的烟气，其中一部分烟气再向上流经中部横板16上的孔，进入进水换热管所在的外壳腔室内，另一部分烟气流动至出水换热管后端再向上流动至进入上部竖板17和上部斜板18分隔形成的空间，再经上部竖板17上的孔进入进水换热管所在的外壳腔室内，这样烟气就流至进水换热管的后端且从后端排向烟气出口11，使得出水换热管后端及进水换热管后端均能有烟气流动来进行加热，不会形成局部的不流动空间造成加热效率的低下，可以通过调整整流孔14对烟气流动进行调整，从而能够使得烟气流动顺畅且换热效率提高。The lower vertical plate 15, the middle horizontal plate 16, and the upper vertical plate 17 of the flue gas rectifying plate are all provided with a plurality of holes, so that the smoke flows into the inner cavity of the shell from the smoke inlet 12, and then flows into through the holes of the lower vertical plate 15. The shell chamber where the water outlet heat exchange tube is located; the flue gas entering the shell chamber where the water outlet heat exchange tube is located, part of the flue gas flows upward through the holes on the middle horizontal plate 16, and enters the shell chamber where the water inlet heat exchange tube is located , the other part of the flue gas flows to the rear end of the water outlet heat exchange tube and then flows upward to enter the space formed by the upper vertical plate 17 and the upper inclined plate 18, and then enters the shell where the water inlet heat exchange tube is located through the hole on the upper vertical plate 17 In this way, the flue gas flows to the rear end of the water inlet heat exchange tube and is discharged from the rear end to the flue gas outlet 11, so that both the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube can have flue gas flow. Heating will not form a local stagnant space and cause low heating efficiency, and the flue gas flow can be adjusted by adjusting the rectification hole 14, so that the flue gas flow can be smooth and the heat exchange efficiency can be improved.
结合图2、4所示，上部斜板18背离烟气进口12的一侧端向下延伸。As shown in FIGS. 2 and 4 , the side end of the upper inclined plate 18 away from the smoke inlet 12 extends downward.
这样的结构设计，使得向上流动至进入上部竖板17和上部斜板18分隔形成的空间，能顺着上部斜板18的斜角顺利流经上部竖板17的整流孔14后进入 进水换热管所在的外壳腔室内，利用烟气的流动，而不会形成局部的烟气不流动。Such a structural design makes it flow upwards to enter the space formed by the separation of the upper vertical plate 17 and the upper inclined plate 18, and can smoothly flow through the rectifying hole 14 of the upper vertical plate 17 along the oblique angle of the upper vertical plate 18 and then enter the water exchange system. In the chamber of the housing where the heat pipe is located, the flow of the flue gas is utilized without forming a local non-flow of the flue gas.
结合图3、4所示，烟气整流板的下部竖板15邻近且面向烟气进口12，下部竖板15上设置有多行孔作为整流孔14，每行孔中部孔的孔径小，两侧孔的孔径大。As shown in Figures 3 and 4, the lower vertical plate 15 of the flue gas rectifying plate is adjacent to and faces the flue gas inlet 12, and the lower vertical plate 15 is provided with a plurality of rows of holes as rectifying holes 14, and the diameter of the middle hole of each row of holes is small. The aperture of the side hole is large.
由于烟气整流板5的下部竖板15邻近且面向烟气进口，但下部竖板面积比烟气进口直径大，因此，为了使得烟气从烟气进口进入外壳腔室后，能较为均匀地流入出水换热管所在的外壳腔室，下部竖板15上设置有多行孔中，每行孔的中部孔的孔径小，两侧孔的孔径大，这样，能让烟气较为均匀地流入出水换热管所在的外壳腔室，从而加热均匀。Since the lower vertical plate 15 of the flue gas rectifying plate 5 is adjacent to and faces the flue gas inlet, but the area of the lower vertical plate is larger than the diameter of the flue gas inlet, therefore, in order to make the flue gas enter the shell chamber from the flue gas inlet, it can be more evenly Into the shell chamber where the water outlet heat exchange tube is located, the lower vertical plate 15 is provided with a plurality of rows of holes, the hole diameter of the middle hole of each row of holes is small, and the hole diameter of the holes on both sides is large, so that the flue gas can flow in more evenly The shell chamber where the water outlet heat exchange tube is located, thus heating evenly.
结合图2、4所示，烟气整流板5的下部竖板15与烟气进口12之间有一定距离。As shown in FIGS. 2 and 4 , there is a certain distance between the lower vertical plate 15 of the flue gas rectifying plate 5 and the flue gas inlet 12 .
为了能使烟气更好地进入出水换热管所在的外壳腔室，烟气整流板5的下部竖板15与烟气进口12之间有一定距离。这样，烟气先进入烟气进口与下部竖板之间并充斥这个空间，这样烟气在此空间内所充斥的面积较烟气进口的直径要大，能更好地进入出水换热管所在的外壳腔室，形成良好的烟气流动和换热效果。In order to allow the flue gas to better enter the shell chamber where the water outlet heat exchange tube is located, there is a certain distance between the lower vertical plate 15 of the flue gas rectifying plate 5 and the flue gas inlet 12 . In this way, the flue gas first enters the space between the flue gas inlet and the lower vertical plate and fills this space. In this way, the area filled by the flue gas in this space is larger than the diameter of the flue gas inlet, and can better enter the place where the outlet water heat exchange tube is located. The outer casing chamber forms a good flue gas flow and heat exchange effect.
在本实施例中，烟气整流板5通过卡槽安装在外壳内侧，在其他实施例中，烟气整流板5可以通过焊接的方式固定在进出水水盒7和内侧水盒3上。烟气整流板5整体可以是一体的，也可以是各部分之间可分开的。In this embodiment, the smoke rectifying plate 5 is installed on the inner side of the housing through a slot. In other embodiments, the smoke rectifying plate 5 can be fixed on the water inlet and outlet water box 7 and the inner water box 3 by welding. The whole flue gas rectifying plate 5 can be integrated, and also can be separable between each part.
烟气整流板5上设计有整流孔14，可以通过调整流孔的位置、数量、尺寸等对烟气流动进行调整，烟气整流板5的中部横板16将二次换热器内部分为下 部对流换热区和上部冷凝区，也即与出水腔连接的换热管所在的外壳内腔的下部区域和与进水腔连接的换热管4所在的外壳内腔的上部区域。烟气进入二次换热器后经烟气整流板5整流后经过对流换热区，对流换热区内的换热管管路内水的温度相对冷凝区换热管管路内水的温度较高，主要通过对流换热的方式吸收烟气的热量，烟气经过烟气整流板5的整流孔14整流后进入冷凝区，烟气经过对流换热区后温度降低，流经冷凝区水温较低的换热管4表面时，烟气中的水蒸气更容易发生冷凝，故在外壳底部设置有冷凝水出口13。冷凝释放的热量被水吸收，进一步提高了换热效率。The flue gas rectifying plate 5 is designed with rectifying holes 14, and the flue gas flow can be adjusted by adjusting the position, quantity, and size of the orifices. The middle horizontal plate 16 of the flue gas rectifying plate 5 divides the interior of the secondary heat exchanger into The lower convective heat exchange zone and the upper condensation zone, that is, the lower area of the shell inner cavity where the heat exchange tube connected to the water outlet chamber is located and the upper area of the shell inner cavity where the heat exchange tube 4 connected to the water inlet cavity is located. After the flue gas enters the secondary heat exchanger, it is rectified by the flue gas rectifying plate 5 and then passes through the convective heat exchange zone. Higher, the heat of the flue gas is absorbed mainly through convective heat exchange. The flue gas enters the condensation area after being rectified by the rectification hole 14 of the flue gas rectification plate 5, and the temperature of the flue gas decreases after passing through the convection heat exchange area. When the surface of the heat exchange tube 4 is lower, the water vapor in the flue gas is more likely to condense, so a condensed water outlet 13 is provided at the bottom of the shell. The heat released by condensation is absorbed by water, which further improves the heat exchange efficiency.
本发明一种燃气采暖炉二次换热器，具有从烟气进口12至下部竖板15至与出水腔10连接的换热管所在的外壳腔室至中部横板16、上部竖板17再至与进水腔9连接的换热管所在的外壳腔室至烟气出口11的烟气流道。通过结构设置形成的烟气流道使得烟气流动能更好地覆盖出水换热管及进水换热管所在的空间，对换热管4内的水进行加热，实现较好的换热效果。A secondary heat exchanger of a gas heating furnace in the present invention has a shell chamber from the flue gas inlet 12 to the lower vertical plate 15 to the heat exchange tube connected to the water outlet cavity 10 to the middle horizontal plate 16, the upper vertical plate 17 and then The flue gas flow path from the shell chamber where the heat exchange tube connected to the water inlet chamber 9 is located to the flue gas outlet 11 . The flue gas flow channel formed by the structural setting enables the flue gas flow to better cover the space where the water outlet heat exchange tube and the water inlet heat exchange tube are located, and heat the water in the heat exchange tube 4 to achieve a better heat exchange effect .
本发明一种燃气采暖炉二次换热器，包括外壳、内侧水盒、多根换热管、进水接口、出水接口及烟气整流板。外壳上设置有烟气进口和烟气出口，且烟气进口和烟气出口均与外壳内腔连通。一部分换热管外侧端与进水接口连通，内侧端与内侧水盒连通；另一部分换热管外侧端与出水接口连通，内侧端与内侧水盒连通。设置有多个通孔的烟气整流板将外壳内腔分隔。前述两部分换热管均位于外壳内腔中，且位于两个不同的分隔腔室内；形成从烟气进口至依次经两个分隔腔室后再至烟气出口的流道。本发明一种燃气采暖炉二次换热器，烟气从烟气进口流入外壳内腔，再经下部竖板的孔流入出水换热管所在的外壳腔室；进入出水换热管所在外壳腔室的烟气，其中一部分烟气再向上流经中部 横板上的孔，进入进水换热管所在的外壳腔室内，另一部分烟气流动至出水换热管后端再向上流动至进入上部竖板和上部斜板分隔形成的空间，再经上部竖板上的孔进入进水换热管所在的外壳腔室内，这样烟气就流至进水换热管的后端且从后端排向烟气出口，使得出水换热管后端及进水换热管后端均能有烟气流动来进行加热，使烟气在二次换热器腔内流经更多换热管，在换热区域的流动更加均匀，从而能够使得烟气流动顺畅且换热效率提高。The invention relates to a secondary heat exchanger of a gas heating furnace, comprising a shell, an inner water box, a plurality of heat exchange tubes, a water inlet interface, a water outlet interface and a flue gas rectifying plate. A flue gas inlet and a flue gas outlet are arranged on the casing, and both the flue gas inlet and the flue gas outlet communicate with the inner cavity of the casing. The outer end of a part of the heat exchange tube is connected with the water inlet port, and the inner end is connected with the inner water box; the outer end of the other part of the heat exchange tube is connected with the water outlet port, and the inner end is connected with the inner water box. The flue gas rectifying plate provided with a plurality of through holes separates the inner cavity of the housing. The aforementioned two parts of the heat exchange tubes are both located in the inner cavity of the housing and located in two different compartments; forming a flow path from the flue gas inlet to the flue gas outlet through the two compartments in sequence. The invention is a secondary heat exchanger for a gas heating furnace. The flue gas flows into the inner cavity of the shell from the flue gas inlet, and then flows into the shell cavity where the water outlet heat exchange tube is located through the hole of the lower vertical plate; enters the shell cavity where the water outlet heat exchange tube is located. Part of the flue gas flows upward through the holes in the middle horizontal plate and enters the shell chamber where the water inlet heat exchange tube is located, and the other part of the flue gas flows to the rear end of the water outlet heat exchange tube and then flows upward to enter the upper part. The space formed by the vertical plate and the upper inclined plate enters the shell chamber where the water inlet heat exchange tube is located through the hole on the upper vertical plate, so that the flue gas flows to the rear end of the water inlet heat exchange tube and is discharged from the rear end. To the flue gas outlet, so that the rear end of the water outlet heat exchange tube and the rear end of the water inlet heat exchange tube can have flue gas flow for heating, so that the flue gas flows through more heat exchange tubes in the secondary heat exchanger cavity, The flow in the heat exchange area is more uniform, so that the flue gas can flow smoothly and the heat exchange efficiency can be improved.
以上所述仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专利的技术人员在不脱离本发明技术方案范围内，当可利用上述提示的技术内容作出些许更动或修饰为等同变化的等效实施例，上述实施例中的实施方案也可以进一步组合或者替换，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明方案的范围内。The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, when the technical content of the above hints can be used to make some changes or modifications to equivalent embodiments with equivalent changes, the implementations in the above examples can also be further combined or replaced. Without departing from the content of the technical solution of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims (10)

  1. 一种燃气采暖炉二次换热器，其特征在于：A secondary heat exchanger for a gas heating furnace, characterized in that:
    包括外壳、内侧水盒、换热管、进水接口、出水接口及烟气整流板，Including shell, inner water box, heat exchange tube, water inlet interface, water outlet interface and flue gas rectification plate,
    外壳，其上设置有与外壳内腔连通的烟气进口和烟气出口；The casing is provided with a flue gas inlet and a flue gas outlet communicating with the inner cavity of the casing;
    烟气整流板，其上设置有多个通孔，烟气整流板将外壳内腔分隔成多个腔室；A flue gas rectifying plate is provided with a plurality of through holes, and the flue gas rectifying plate divides the inner cavity of the shell into multiple chambers;
    换热管，包括多根换热管，一部分换热管的外侧端与进水接口连通，另一部分换热管的外侧端与出水接口连通，所有换热管的内侧端均与内侧水盒连通；Heat exchange tubes, including multiple heat exchange tubes, one part of the outer end of the heat exchange tube is connected to the water inlet port, the other part of the heat exchange tube is connected to the outer end of the water outlet port, and the inner end of all the heat exchange tubes is connected to the inner water box ;
    所述两部分换热管分别位于两个不同的分隔腔室内。The two parts of heat exchange tubes are respectively located in two different compartments.
  2. 根据权利要求1所述的一种燃气采暖炉二次换热器，其特征在于：A secondary heat exchanger for gas heating furnace according to claim 1, characterized in that:
    还包括进出水水盒，进出水水盒包括相互独立的进水腔和出水腔，进水腔连接进水接口，出水腔连接出水接口，It also includes a water inlet and outlet box, the water inlet and outlet box includes a water inlet chamber and an outlet chamber that are independent of each other, the water inlet chamber is connected to the water inlet interface, and the water outlet chamber is connected to the water outlet interface.
    一部分换热管外侧端与进水腔连接进而与进水接口连通，内侧端与内侧水盒连通，The outer end of a part of the heat exchange tube is connected to the water inlet chamber and then communicated with the water inlet interface, and the inner end is connected to the inner water box.
    另一部分换热管外侧端与出水腔连接进而与出水接口连通，内侧端与内侧水盒连通。The outer end of the other part of the heat exchange tube is connected to the water outlet chamber and then communicated with the water outlet interface, and the inner end is communicated with the inner water box.
  3. 根据权利要求2所述的一种燃气采暖炉二次换热器，其特征在于：所有换热管平行排列形成换热管束，A secondary heat exchanger for gas heating furnace according to claim 2, characterized in that: all heat exchange tubes are arranged in parallel to form a heat exchange tube bundle,
    与进水腔连接的换热管在外壳内腔的上部，与出水腔连接的换热管在外壳内腔的下部，且两部分换热管由烟气整流板隔离。The heat exchange tube connected to the water inlet chamber is at the upper part of the shell inner cavity, and the heat exchange tube connected to the water outlet cavity is at the lower part of the shell inner cavity, and the two heat exchange tubes are separated by the flue gas rectifying plate.
  4. 根据权利要求2所述的一种燃气采暖炉二次换热器，其特征在于：外壳一侧设有开口，内侧水盒及换热管从外壳一侧的开口推入外壳内腔中，进出水 水盒可拆卸地固定在外壳上且进出水水盒封闭外壳的此侧开口。A secondary heat exchanger for a gas heating furnace according to claim 2, wherein an opening is provided on one side of the shell, and the inner water box and the heat exchange tube are pushed into the inner cavity of the shell through the opening on one side of the shell, and enter and exit The water box is detachably fixed on the shell and enters and exits the side opening of the closed shell of the water box.
  5. 根据权利要求1所述的一种燃气采暖炉二次换热器，其特征在于：烟气整流板包括下部竖板、中部横板、上部竖板及上部斜板，A secondary heat exchanger for a gas heating furnace according to claim 1, wherein the flue gas rectifying plate includes a lower vertical plate, a middle horizontal plate, an upper vertical plate and an upper inclined plate,
    中部横板的一侧连接下部竖板的顶端，中部横板的另一侧连接上部竖板的底端，One side of the middle horizontal plate is connected to the top of the lower vertical plate, and the other side of the middle horizontal plate is connected to the bottom of the upper vertical plate.
    上部斜板的一端连接上部竖板的顶端，且上部斜板的另一端向背离烟气进口的一侧延伸。One end of the upper inclined plate is connected to the top of the upper vertical plate, and the other end of the upper inclined plate extends to the side away from the smoke inlet.
  6. 根据权利要求2所述的一种燃气采暖炉二次换热器，其特征在于：烟气整流板的下部竖板、中部横板、上部竖板上均设置有多个孔。A secondary heat exchanger for a gas heating furnace according to claim 2, characterized in that: the lower vertical plate, the middle horizontal plate, and the upper vertical plate of the flue gas rectifying plate are all provided with a plurality of holes.
  7. 根据权利要求6所述的一种燃气采暖炉二次换热器，其特征在于：上部斜板背离烟气进口的一侧端向下延伸。A secondary heat exchanger for a gas heating furnace according to claim 6, characterized in that: the side end of the upper sloping plate away from the flue gas inlet extends downward.
  8. 根据权利要求6所述的一种燃气采暖炉二次换热器，其特征在于：烟气整流板的下部竖板邻近且面向烟气进口，下部竖板上设置有多行孔，每行孔中部孔的孔径小，两侧孔的孔径大。A secondary heat exchanger for a gas heating furnace according to claim 6, characterized in that: the lower vertical plate of the flue gas rectifying plate is adjacent to and faces the flue gas inlet, and the lower vertical plate is provided with multiple rows of holes, each row of holes The diameter of the central hole is small, and the diameter of the holes on both sides is large.
  9. 根据权利要求6所述的一种燃气采暖炉二次换热器，其特征在于：烟气整流板的下部竖板与烟气进口之间有一定距离。The secondary heat exchanger of a gas heating furnace according to claim 6, wherein there is a certain distance between the lower vertical plate of the flue gas rectifying plate and the flue gas inlet.
  10. 根据权利要求6所述的一种燃气采暖炉二次换热器，其特征在于：具有从烟气进口至下部竖板至与出水腔连接的换热管所在的外壳腔室至中部横板、上部竖板再至与进水腔连接的换热管所在的外壳腔室至烟气出口的烟气流道。A secondary heat exchanger for a gas heating furnace according to claim 6, characterized in that it has a shell chamber from the flue gas inlet to the lower vertical plate to the shell chamber where the heat exchange tube connected to the water outlet chamber is located to the middle horizontal plate, From the upper vertical plate to the flue gas flow channel from the shell chamber where the heat exchange tube connected to the water inlet chamber is located to the flue gas outlet.
PCT/CN2022/132830 2022-01-13 2022-11-18 Secondary heat exchanger for gas heating furnace WO2023134298A1 (en)

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CN114608201A (en) * 2022-01-13 2022-06-10 青岛经济技术开发区海尔热水器有限公司 Secondary heat exchanger of gas heating stove

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CN214468731U (en) * 2021-02-06 2021-10-22 北京建筑大学 Flue gas cooling and condensing integrated heat exchanger
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CN202853118U (en) * 2012-09-21 2013-04-03 广东万家乐燃气具有限公司 Secondary heat exchanger used for gas heating stove
CN203687368U (en) * 2013-07-15 2014-07-02 盛水祥 Secondary heat exchanger of fuel gas heating water heater
CN204100585U (en) * 2014-08-13 2015-01-14 广东万和新电气股份有限公司 Condensing heat exchanger and there is its forced exhaust gas water heater
CN105486122A (en) * 2016-02-03 2016-04-13 浙江广涛卫厨有限公司 Condensation secondary heat exchanger
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CN212205073U (en) * 2020-01-08 2020-12-22 宁波方太厨具有限公司 Heat exchange device for gas water heater and gas water heater
CN214468731U (en) * 2021-02-06 2021-10-22 北京建筑大学 Flue gas cooling and condensing integrated heat exchanger
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CN114608201A (en) * 2022-01-13 2022-06-10 青岛经济技术开发区海尔热水器有限公司 Secondary heat exchanger of gas heating stove

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