CN117028964A - Enhanced heat transfer condensing gas boiler with water-cooling premixing planar burner - Google Patents
Enhanced heat transfer condensing gas boiler with water-cooling premixing planar burner Download PDFInfo
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- CN117028964A CN117028964A CN202311216643.5A CN202311216643A CN117028964A CN 117028964 A CN117028964 A CN 117028964A CN 202311216643 A CN202311216643 A CN 202311216643A CN 117028964 A CN117028964 A CN 117028964A
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- heat transfer
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- tube
- boiler
- flue gas
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- 238000012546 transfer Methods 0.000 title claims abstract description 108
- 238000001816 cooling Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000003546 flue gas Substances 0.000 claims description 65
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 61
- 239000007789 gas Substances 0.000 claims description 36
- 239000012528 membrane Substances 0.000 claims description 13
- 238000007689 inspection Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- LVYZJEPLMYTTGH-UHFFFAOYSA-H dialuminum chloride pentahydroxide dihydrate Chemical compound [Cl-].[Al+3].[OH-].[OH-].[Al+3].[OH-].[OH-].[OH-].O.O LVYZJEPLMYTTGH-UHFFFAOYSA-H 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
- F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/06—Flue or fire tubes; Accessories therefor, e.g. fire-tube inserts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The application discloses an intensified heat transfer condensing gas boiler with a water-cooling premixing planar burner, which comprises a boiler body, wherein the boiler body comprises a cylinder body, the water-cooling premixing planar burner arranged at the front end of the cylinder body, an upper end socket arranged at the upper end of the cylinder body, a lower end socket arranged at the lower end of the cylinder body and a tail flue arranged at the rear end of the cylinder body, an upper tube plate and a lower tube plate are arranged in the cylinder body up and down, an upper cavity is formed between the upper tube plate and the upper end socket, a lower cavity is formed between the lower tube plate and the lower end socket, and a water tube group is arranged between the upper tube plate and the lower tube plate and is used for communicating the upper cavity with the lower cavity. Compared with the prior art, the application has the advantages that: the gas boiler has the advantages of high-efficiency heat energy utilization, compact structural design, natural circulation mode, high-efficiency heat exchange tube group and energy saver, realizes excellent heat efficiency and environmental protection performance, provides reliable energy supply for users, and reduces operation cost.
Description
Technical Field
The application relates to a gas boiler technology, in particular to an intensified heat transfer condensing gas boiler with a water-cooling premixing planar burner.
Background
Conventional gas boilers find widespread use in industrial and domestic heating, but have some important technical limitations and problems. Conventional burners typically produce relatively large flames, thus requiring large combustion chambers to accommodate these flames, which makes the boiler bulky and presents challenges for installation and maintenance. In addition, conventional boilers rely primarily on convective heat transfer means, which results in relatively low heat transfer efficiency, requiring large area heat exchangers to meet heating requirements. Therefore, the conventional boiler requires a large amount of metal materials to construct, which not only causes waste of resources, but also increases costs.
Disclosure of Invention
In order to overcome the technical defects, the application provides an enhanced heat transfer condensing gas boiler with a water-cooling premixing planar burner.
According to the application, the enhanced heat transfer condensing gas boiler with the water-cooling premixing planar burner comprises a boiler body, wherein the boiler body comprises a cylinder body, the water-cooling premixing planar burner arranged at the front end of the cylinder body, an upper end socket arranged at the upper end of the cylinder body, a lower end socket arranged at the lower end of the cylinder body and a tail flue arranged at the rear end of the cylinder body, an upper tube plate and a lower tube plate are arranged in the cylinder body up and down, an upper cavity is formed between the upper tube plate and the upper end socket, a lower cavity is formed between the lower tube plate and the lower end socket, a water tube group is arranged between the upper tube plate and the lower tube plate, and the water tube group is used for communicating the upper cavity with the lower cavity;
the water pipe group comprises a combustor water cooling surface, a membrane type wall surface, a down pipe, a heat transfer light pipe and a first narrow-gap enhanced heat transfer pipe group, wherein the combustor water cooling surface, the membrane type wall surface, an upper pipe plate and a lower pipe plate form a smoke circulation channel, the heat transfer light pipe and the first narrow-gap enhanced heat transfer pipe group are arranged in the smoke circulation channel and subjected to flame radiation and smoke convection heat transfer, and the down pipe is arranged outside the smoke circulation channel;
the flue gas circulation channel is internally provided with an energy saver, the tail flue is internally provided with a condenser, the water outlet header of the condenser is communicated with the water inlet header of the energy saver, and the water outlet header of the energy saver is communicated with a water supply pipe seat arranged on the upper end socket.
Preferably, the heat transfer part between the water inlet header and the water outlet header of the energy saver is a spiral fin tube or a second narrow-gap enhanced heat transfer tube group, and the heat transfer part between the water inlet header and the water outlet header of the condenser is a spiral fin tube or a third narrow-gap enhanced heat transfer tube group.
Preferably, the first narrow-gap enhanced heat transfer tube group, the second narrow-gap enhanced heat transfer tube group and the third narrow-gap enhanced heat transfer tube group each comprise a plurality of longitudinally arranged double-wing arc-shaped finned tubes and a plurality of longitudinally arranged double-wing flat finned tubes, each double-wing arc-shaped finned tube comprises a first light tube, longitudinal arc-shaped curved fins are arranged on two sides of each first light tube, each double-wing flat finned tube comprises a second light tube, longitudinal ribs are arranged at the front end and the rear end of each second light tube, each two adjacent double-wing arc-shaped finned tubes encircle the corresponding double-wing flat finned tube through the corresponding longitudinal arc-shaped curved fins, and a curved smoke flow gap is formed between each double-wing arc-shaped finned tube and each double-wing flat finned tube.
Preferably, the width of the curved flue gas flow gap is less than 5mm.
Preferably, the upper seal head is internally provided with an air equalizing plate and an underwater pore plate, the upper seal head is also provided with a deflation pipe seat, a safety valve pipe seat, a liquid level meter pipe seat, a main steam pipe seat and an upper inspection manhole, and the bottom of the lower seal head is provided with a sewage pipe seat and a lower inspection manhole.
Preferably, the lower ends of the lower tube plate and the tail flue are both provided with condensed water discharge pipes.
Preferably, the cylinder is rolled by a metal plate.
Preferably, an air preheater is arranged at the flue gas outlet of the tail flue.
Compared with the prior art, the enhanced heat transfer condensing gas boiler with the water-cooling premixing planar burner has the advantages that:
1. the boiler body comprises water-cooling premixing planar burner, energy-saving appliance, condenser, air preheater etc., through condenser, air preheater's setting, realized flue gas condensation exothermic heat and the heat balance problem of boiler endothermic heat, can effectively reduce the exhaust gas temperature, really realize absorbing and utilizing the latent heat of vaporization in the flue gas to realize the boiler thermal efficiency and reach 103% target.
2. The water-cooling premixing planar burner reduces the size of burning flame, ensures high-efficiency and low-nitrogen burning, reduces the burning volume of the flame, almost does not need a hearth, and greatly reduces the burning space;
3. the boiler body adopts a vertical straight water pipe group structure and a natural circulation mode, eliminates complex structures such as a traditional header, a connecting pipeline and the like, has simple and compact structure and small steel consumption;
4. the middle-low temperature flue gas section of the boiler adopts a first narrow-gap enhanced heat transfer tube group type, the heat transfer capacity of the boiler is 3-5 times of that of the traditional convection heat transfer capacity, and the heat transfer area of the boiler and the metal steel consumption are greatly reduced.
5. The boiler is characterized in that the energy-saving device is integrally arranged in the boiler body, normal maintenance of the energy-saving device is not influenced, a supporting steel frame and heat preservation of the traditional energy-saving device are omitted, the structure is compact, the steel consumption is small, and the boiler is simple and convenient.
Drawings
Fig. 1 is a schematic view of a heat transfer enhanced condensing gas boiler with a water-cooled premixed planar burner according to embodiment 1 of the present application.
Fig. 2 is a schematic top view of the inside of a cylinder in an enhanced heat transfer condensing gas boiler with a water-cooled premix flat burner according to embodiment 1 of the present application.
FIG. 3 is a schematic view of a partially enlarged construction of a first narrow gap enhanced heat transfer tube bank in an enhanced heat transfer condensing gas boiler with a water cooled premix planar burner in accordance with the present application.
Fig. 4 is a schematic view of a heat transfer enhanced condensing gas boiler with a water-cooled premixed planar burner according to embodiment 2 of the present application.
Fig. 5 is a schematic view showing an internal top view structure of a cylinder in an enhanced heat transfer condensing gas boiler having a water-cooled premixed planar burner according to embodiment 2 of the present application.
Fig. 6 is a schematic view showing the structure of a spiral fin tube in an enhanced heat transfer condensing gas boiler having a water-cooled premixed planar burner according to embodiment 2 of the present application.
Reference numerals: 1. the device comprises a cylinder body, 2 water-cooling premixing planar combustors, 3, an upper head, 4, a lower head, 5, a tail flue, 6, an upper tube plate, 7, a lower tube plate, 8, a combustor water cooling surface, 9, a membrane wall surface, 10, a downcomer, 11, a heat transfer light tube, 12, a first narrow gap enhanced heat transfer tube group, 13, an economizer, 14, a condenser, 15, a water supply tube seat, 16, a spiral fin tube, 17, a second narrow gap enhanced heat transfer tube group, 18, a third narrow gap enhanced heat transfer tube group, 19, a double-wing arc-shaped fin tube, 191, a first light tube, 192, a longitudinal arc-shaped fin, 20, a double-wing flat fin tube, 201, a second light tube, 202, a longitudinal fin, 21, a curved flue gas flow gap, 22, a gas equalizing plate, 23, an underwater orifice plate, 24, a gas discharge tube seat, 25, a safety valve tube seat, 26, a liquid level meter tube seat, 27, a main tube seat, 28, an upper inspection manhole, 29, a blow-down tube seat, 30, a lower manhole, 31, a discharge tube, 32 and an air preheater.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
As shown in fig. 1-3, an enhanced heat transfer condensing gas boiler with a water-cooling premixing planar burner comprises a boiler body, wherein the boiler body comprises a cylinder 1, a water-cooling premixing planar burner 2 arranged at the front end of the cylinder 1, an upper sealing head 3 arranged at the upper end of the cylinder 1, a lower sealing head 4 arranged at the lower end of the cylinder 1 and a tail flue 5 arranged at the rear end of the cylinder 1, an upper tube plate 6 and a lower tube plate 7 are arranged in the cylinder 1 up and down, an upper cavity is formed between the upper tube plate 6 and the upper sealing head 3, a lower cavity is formed between the lower tube plate 7 and the lower sealing head 4, a water tube group is arranged between the upper tube plate 6 and the lower tube plate 7, and the upper cavity and the lower cavity are communicated, and the components cooperate to form a complete boiler system so as to ensure heat transfer and fluid circulation;
the water pipe group comprises a combustor water cooling surface 8, a membrane type wall surface 9, a downcomer 10, a heat transfer light pipe 11 and a first narrow-gap enhanced heat transfer pipe group 12, wherein the combustor water cooling surface 8, the membrane type wall surface 9, an upper pipe plate 6 and a lower pipe plate 7 form a flue gas circulation channel, the heat transfer light pipe 11 and the first narrow-gap enhanced heat transfer pipe group 12 are arranged in the flue gas circulation channel and are subjected to flame radiation and flue gas convection heat transfer, and the downcomer 10 is arranged outside the flue gas circulation channel and is not heated;
an economizer 13 is also arranged in the flue gas circulation channel, a condenser 14 is arranged in the tail flue 5, a water outlet header of the condenser 14 is communicated with a water inlet header of the economizer 13, and the water outlet header of the economizer 13 is communicated with a water supply tube seat 15 arranged on the upper seal head 3. The economizer 13 is arranged in the flue gas circulation channel, which is a key technical innovation and is helpful for optimizing the heat energy utilization of the flue gas. A condenser 14 is provided in the back flue 5 and serves to cool the flue gases, thereby causing water vapour in the flue gases to condense into a liquid. The water outlet header of the condenser 14 is connected with the water inlet header of the economizer 13, ensuring the effective realization of heat transfer and heat balance.
In the present embodiment, the heat transfer portion between the inlet header and the outlet header of the economizer 13 is a second narrow gap enhanced heat transfer tube group 17, the heat transfer portion between the inlet header and the outlet header of the condenser 14 is a third narrow gap enhanced heat transfer tube group 18, the first narrow gap enhanced heat transfer tube group 12, the second narrow gap enhanced heat transfer tube group 17 and the third narrow gap enhanced heat transfer tube group 18 each include a plurality of longitudinally disposed double-winged arc-shaped finned tubes 19 and a plurality of longitudinally disposed double-winged straight finned tubes 20, the double-winged arc-shaped finned tubes 19 include a first light pipe 191, both sides of the first light pipe 191 are provided with longitudinal arc-shaped curved fins 192, the double-winged straight finned tubes 20 include a second light pipe 201, both front and rear ends of the second light pipe 201 are provided with longitudinal ribs 202, the two adjacent double-wing arc-shaped finned tubes 19 encircle the double-wing straight finned tubes 20 through the longitudinal arc-shaped curved fins 192, curved smoke flow gaps 21 are formed between the double-wing arc-shaped finned tubes 19 and the double-wing straight finned tubes 20, six-prismatic-shaped spaces are formed between the two adjacent double-wing arc-shaped finned tubes 19 and the double-wing straight finned tubes 20, and smoke is diffused on other wall surfaces of the six-prismatic-shaped spaces through turbulent reinforced heat exchange in the process of sequentially passing through the six-prismatic-shaped spaces through the curved smoke flow gaps 21, so that the heat exchange process is reinforced, the smoke can be reduced to below 300 ℃ from 700 ℃ through three rows of first narrow-gap reinforced heat transfer tube groups 12, and the heat exchange capacity of the smoke is 3-5 times that of the traditional convection heat exchange capacity.
In this embodiment, the width of the curved flue gas flow gap 21 is less than 5mm.
In this embodiment, a gas equalizing plate 22 and an underwater orifice plate 23 are disposed in the upper end enclosure 3, a gas discharging tube seat 24, a safety valve tube seat 25, a liquid level meter tube seat 26, a main steam tube seat 27 and an upper inspection manhole 28 are further disposed on the upper end enclosure 3, and a blow-down tube seat 29 and a lower inspection manhole 30 are disposed at the bottom of the lower end enclosure 4. An air equalizing plate 22 and an underwater orifice plate 23 are arranged in the upper seal head 3. The purpose of the air equalizing plate 22 is to ensure that the steam is more uniform in the rising process, and in addition, a series of accessories including a deflation valve seat 24, a safety valve seat 25, a liquid level meter seat 26, a main steam pipe seat 27 and an upper inspection manhole 28 are further arranged on the upper sealing head 3. These accessories are an important component of the boiler system and function as follows:
the bleed pipe seat 24 is used to exhaust gas or exhaust gas from the system to maintain pressure balance when the boiler is being fed with water.
The relief valve seat 25 is a position for installing the relief valve to ensure that the boiler can safely release excessive pressure when the allowable maximum pressure is exceeded.
The level gauge stem 26 is a means for monitoring and measuring the boiler water level to ensure that the water level is within a safe range.
The main steam pipe seat 27 is used for connecting a main steam pipe to convey generated steam to a required position.
The upper manholes 28 are passages for maintenance and overhaul, allowing personnel to enter the boiler interior for inspection and maintenance work.
In the present embodiment, in order to effectively treat the condensed water, a condensed water drain pipe 31 is designed, and the condensed water drain pipe 31 is located at the lower end of the lower tube plate 7 and the back flue 5. The condensate is formed by the condenser 14, which is guided to this pipe when the water vapour in the flue gas condenses into a liquid, which design ensures an efficient discharge of condensate while maintaining a stable operation of the boiler system.
In this embodiment, the cylinder 1 is rolled from a metal plate.
In this embodiment, an air preheater 32 is provided at the flue gas outlet of the back pass 5. The air preheater 32 utilizes the waste heat in the flue gas to preheat the air entering the burner, thereby reducing fuel consumption. The device is favorable for further improving the heat efficiency of the gas boiler, reducing the energy consumption and lowering the operation cost. The air preheater 32 may be configured as a tube box or as a heat pipe.
Working principle: first, the water-cooled premix planar burner 2 is started and the fuel burns to provide heat energy, comprising flames and high temperature flue gases flowing in a flue gas flow path consisting of the burner water-cooled face 8, the membrane wall 9, the upper tube sheet 6 and the lower tube sheet 7. In this flue gas flow channel, heat is transferred by flame radiation and flue gas convection, heat energy is transferred to water and other heat transfer media in the boiler, an economizer 13 is arranged in the flue gas flow channel, a condenser 14 is arranged in the tail flue 5, an air preheater 32 is arranged at the flue gas outlet of the tail flue 5, the economizer 13 is used for optimizing heat energy utilization of flue gas, the condenser 14 and the air preheater 32 are used for further absorbing heat of flue gas, reducing the temperature of discharged flue gas and cooling the flue gas, so that water vapor in the flue gas is condensed into liquid, latent heat of vaporization is released, and the condenser 14 and the air preheater 32 ensure effective realization of heat transfer and heat balance. The water outlet header of the condenser 14 is connected with the water inlet header of the economizer 13, cold water is led into the water inlet header of the condenser 14, the cold water transfers heat through the heat transfer parts of the condenser 14 and the economizer 13, then enters the upper cavity of the upper seal head 3, low temperature water enters the lower cavity of the lower seal head through the upper seal head 3 and the downcomer 10 in the water pipe group, and then flows into the upper cavity of the upper seal head 3 after being heated through the burner water cooling surface 8, the membrane wall surface 9, the heat transfer light pipe 11 and the first narrow-gap reinforced heat transfer pipe group 12 in the water pipe group. The low-temperature water absorbs heat released by the combustion of the fuel in the flowing process, continuously heats up and finally becomes high-temperature water or steam, and the high-temperature water or steam can be used by users. And involves the first narrow gap enhanced heat transfer tube group 12, the second narrow gap enhanced heat transfer tube group 17, and the third narrow gap enhanced heat transfer tube group 18 in the flue gas heat transfer process. These heat transfer tube groups include longitudinally disposed double-winged arc-shaped fin tubes 19 and double-winged straight fin tubes 20. A curved flue gas flow gap 21 is formed between adjacent ones of the tube sets, wherein the width is less than 5mm. The design can increase the heat transfer surface area, so that the heat energy in the flue gas can be more effectively transferred to water or other heat transfer media, and the heat transfer efficiency is improved.
Example 2
Referring to fig. 4-6, an enhanced heat transfer condensing gas boiler with a water-cooled premixed planar burner comprises a boiler body, wherein the boiler body comprises a cylinder 1, a water-cooled premixed planar burner 2 arranged at the front end of the cylinder 1, an upper seal head 3 arranged at the upper end of the cylinder 1, a lower seal head 4 arranged at the lower end of the cylinder 1 and a tail flue 5 arranged at the rear end of the cylinder 1, an upper tube plate 6 and a lower tube plate 7 are arranged in the cylinder 1 up and down, an upper cavity is formed between the upper tube plate 6 and the upper seal head 3, a lower cavity is formed between the lower tube plate 7 and the lower seal head 4, a water tube group is arranged between the upper tube plate 6 and the lower tube plate 7, and the water tube group is used for communicating the upper cavity with the lower cavity;
the water pipe group comprises a combustor water cooling surface 8, a membrane type wall surface 9, a downcomer 10, a heat transfer light pipe 11 and a first narrow-gap enhanced heat transfer pipe group 12, wherein the combustor water cooling surface 8, the membrane type wall surface 9, an upper pipe plate 6 and a lower pipe plate 7 form a flue gas circulation channel, the heat transfer light pipe 11 and the first narrow-gap enhanced heat transfer pipe group 12 are arranged in the flue gas circulation channel and are subjected to flame radiation and flue gas convection heat transfer, and the downcomer 10 is arranged outside the flue gas circulation channel;
an economizer 13 is also arranged in the flue gas circulation channel, a condenser 14 is arranged in the tail flue 5, a water outlet header of the condenser 14 is communicated with a water inlet header of the economizer 13, and the water outlet header of the economizer 13 is communicated with a water supply tube seat 15 arranged on the upper seal head 3.
In this embodiment, the heat transfer portion between the inlet header and the outlet header of the economizer 13 is a spiral fin tube, the heat transfer portion between the inlet header and the outlet header of the condenser 14 is a spiral fin tube 16, and the spiral fin tube 16 is a highly efficient heat transfer element designed to increase the heat transfer surface area, thereby improving the heat transfer efficiency, and the spiral fin tube provides more contact surface than the conventional heat transfer element, so that the heat energy in the flue gas can be transferred to water or other heat transfer medium more effectively. This may result in higher thermal efficiency, reducing waste of energy. Since the heat transfer portion between the inlet header and the outlet header of the condenser 14 is a spiral fin tube 16, the entire height thereof is small, so that it can be embedded in the back pass 5 located below the air preheater 32.
In this embodiment, the first narrow-gap enhanced heat transfer tube group 12 includes a plurality of longitudinally disposed double-wing arc-shaped finned tubes 19 and a plurality of longitudinally disposed double-wing straight finned tubes 20, the double-wing arc-shaped finned tubes 19 include a first light pipe 191, both sides of the first light pipe 191 are provided with longitudinal arc-shaped curved fins 192, the double-wing straight finned tubes 20 include a second light pipe 201, both front and rear ends of the second light pipe 201 are provided with longitudinal ribs 202, two adjacent double-wing arc-shaped finned tubes 19 encircle the double-wing straight finned tubes 20 through the longitudinal arc-shaped curved fins 192, a curved flue gas flow gap 21 is formed between the double-wing arc-shaped finned tubes 19 and the double-wing straight finned tubes 20, wherein six prism-shaped spaces are formed between the adjacent two rows of double-wing arc-shaped finned tubes 19 and the double-wing straight finned tubes 20, and flue gas passes through the curved flue gas flow gap 21 in turn through the six prism-shaped spaces, and heat exchange enhancement is performed on other wall surfaces of the six prism-shaped spaces by turbulence, so that in the heat exchange process, only three rows of first narrow-gap enhanced heat transfer tubes are needed, and the heat exchange capacity of heat exchange can be reduced from below 3 ℃ to 300 times of conventional heat exchange tube groups.
In this embodiment, the width of the curved flue gas flow gap 21 is less than 5mm.
In this embodiment, a gas equalizing plate 22 and an underwater orifice plate 23 are disposed in the upper end enclosure 3, a gas discharging tube seat 24, a safety valve tube seat 25, a liquid level meter tube seat 26, a main steam tube seat 27 and an upper inspection manhole 28 are further disposed on the upper end enclosure 3, and a blow-down tube seat 29 and a lower inspection manhole 30 are disposed at the bottom of the lower end enclosure 4.
In this embodiment, the lower tube plate 7 and the lower end of the back flue 5 are both provided with condensate drain pipes 31.
In this embodiment, the cylinder 1 is rolled from sheet metal, which is generally selected for its excellent high temperature resistance, corrosion resistance and strength. The metal plate rolled cylinder has sufficient structural strength to withstand the pressure and thermal stresses of the boiler during operation while maintaining its structural stability.
In this embodiment, the flue gas outlet of the tail flue 5 is provided with an air preheater 32, and the air preheater 32 uses the waste heat in the flue gas to preheat the air entering the burner, thereby reducing the fuel consumption. The device is favorable for further improving the heat efficiency of the gas boiler, reducing the energy consumption and lowering the operation cost.
Working principle: first, the water-cooled premix planar burner 2 is started and the fuel burns to provide heat energy, comprising flames and high temperature flue gases flowing in a flue gas flow path consisting of the burner water-cooled face 8, the membrane wall 9, the upper tube sheet 6 and the lower tube sheet 7. In this flue gas flow channel, heat is transferred by flame radiation and flue gas convection, heat energy is transferred to water and other heat transfer media in the boiler, an economizer 13 is arranged in the flue gas flow channel, a condenser 14 is arranged in the tail flue 5, an air preheater 32 is arranged at the flue gas outlet of the tail flue 5, the economizer 13 is used for optimizing heat energy utilization of flue gas, the condenser 14 and the air preheater 32 are used for further absorbing heat of flue gas, reducing the temperature of discharged flue gas and cooling the flue gas, so that water vapor in the flue gas is condensed into liquid, latent heat of vaporization is released, and the condenser 14 and the air preheater 32 ensure effective realization of heat transfer and heat balance. The water outlet header of the condenser 14 is connected with the water inlet header of the economizer 13, cold water is led into the water inlet header of the condenser 14, the cold water transfers heat through the heat transfer parts of the condenser 14 and the economizer 13, then enters the upper cavity of the upper seal head 3, low temperature water enters the lower cavity of the lower seal head through the upper seal head 3 and the downcomer 10 in the water pipe group, and then flows into the upper cavity of the upper seal head 3 after being heated through the burner water cooling surface 8, the membrane wall surface 9, the heat transfer light pipe 11 and the first narrow-gap reinforced heat transfer pipe group 12 in the water pipe group. The low-temperature water absorbs heat released by the combustion of the fuel in the flowing process, continuously heats up and finally becomes high-temperature water or steam, and the high-temperature water or steam can be used by users.
The above embodiments are only for illustrating the technical solution of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions, which are defined by the appended claims.
Claims (8)
1. The utility model provides an intensive heat transfer condensing gas boiler with water-cooling mixes planar burner, includes the boiler body, its characterized in that, the boiler body includes barrel (1), water-cooling mixes planar burner (2) in barrel (1) front end in advance, sets up upper cover (3) in barrel (1) upper end, sets up low head (4) in barrel (1) lower extreme and sets up afterbody flue (5) in barrel (1) rear end in advance, be provided with upper tube sheet (6) and low tube sheet (7) from top to bottom in barrel (1), form upper portion cavity and lower part cavity between low tube sheet (7) and the low head (4) between upper tube sheet (6) and upper cover (3), be equipped with water pipe group and water pipe group between upper tube sheet (6) and low tube sheet (7) with upper portion cavity and lower part cavity intercommunication;
the water pipe group comprises a combustor water cooling surface (8), a membrane type wall surface (9), a descending pipe (10), a heat transfer light pipe (11) and a first narrow-gap reinforced heat transfer pipe group (12), wherein the combustor water cooling surface (8), the membrane type wall surface (9), an upper pipe plate (6) and a lower pipe plate (7) form a flue gas circulation channel, the heat transfer light pipe (11) and the first narrow-gap reinforced heat transfer pipe group (12) are arranged in the flue gas circulation channel and subjected to flame radiation and flue gas convection heat transfer, and the descending pipe (10) is arranged outside the flue gas circulation channel;
the flue gas circulation channel is internally provided with an energy saver (13), the tail flue (5) is internally provided with a condenser (14), the water outlet header of the condenser (14) is communicated with the water inlet header of the energy saver (13), and the water outlet header of the energy saver (13) is communicated with a water supply tube seat (15) arranged on the upper seal head (3).
2. The intensified heat transfer condensing gas boiler with water-cooled premixed planar burner according to claim 1, wherein the heat transfer portion between the water inlet header and the water outlet header of the economizer (13) is a spiral fin tube (16) or a second narrow gap intensified heat transfer tube group (17), and the heat transfer portion between the water inlet header and the water outlet header of the condenser (14) is a spiral fin tube (16) or a third narrow gap intensified heat transfer tube group (18).
3. The enhanced heat transfer condensing gas boiler with a water-cooled premixed planar burner according to claim 2, wherein the first narrow-gap enhanced heat transfer tube group (12), the second narrow-gap enhanced heat transfer tube group (17) and the third narrow-gap enhanced heat transfer tube group (18) each comprise a plurality of longitudinally arranged double-wing arc-shaped finned tubes (19) and a plurality of longitudinally arranged double-wing flat finned tubes (20), the double-wing arc-shaped finned tubes (19) comprise a first light tube (191), longitudinal arc-shaped curved fins (192) are arranged on two sides of the first light tube (191), the double-wing flat finned tubes (20) comprise a second light tube (201), longitudinal ribs (202) are arranged on the front end and the rear end of the second light tube (201), the adjacent two double-wing arc-shaped finned tubes (19) encircle the double-wing flat finned tubes (20) through the longitudinal arc-shaped curved fins (192), and a curved flue gas flowing gap (21) is formed between the double-wing arc-shaped finned tubes (19) and the double-wing flat finned tubes (20).
4. A heat transfer enhanced condensing gas boiler with water-cooled premixed planar burner according to claim 3 characterized by said curved flue gas flow gap (21) width is less than 5mm.
5. The enhanced heat transfer condensing gas boiler with the water-cooled premixed planar burner according to claim 1, wherein a gas equalizing plate (22) and an underwater orifice plate (23) are arranged in the upper end enclosure (3), a gas discharging tube seat (24), a safety valve tube seat (25), a liquid level meter tube seat (26), a main steam tube seat (27) and an upper inspection manhole (28) are further arranged on the upper end enclosure (3), and a blow-down tube seat (29) and a lower inspection manhole (30) are arranged at the bottom of the lower end enclosure (4).
6. The enhanced heat transfer condensing gas boiler with water-cooled premixed planar burner according to claim 1, characterized in that the lower ends of the lower tube plate (7) and the tail flue (5) are both provided with condensed water drain pipes (31).
7. The enhanced heat transfer condensing gas boiler with water-cooled premixed planar burner according to claim 1, characterized in that said cylinder (1) is rolled with sheet metal.
8. The enhanced heat transfer condensing gas boiler with water cooled premixed planar burner of claim 1 wherein an air preheater (32) is provided at the flue gas outlet of said back pass (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311216643.5A CN117028964A (en) | 2023-09-20 | 2023-09-20 | Enhanced heat transfer condensing gas boiler with water-cooling premixing planar burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311216643.5A CN117028964A (en) | 2023-09-20 | 2023-09-20 | Enhanced heat transfer condensing gas boiler with water-cooling premixing planar burner |
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| Publication Number | Publication Date |
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| CN117028964A true CN117028964A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311216643.5A Pending CN117028964A (en) | 2023-09-20 | 2023-09-20 | Enhanced heat transfer condensing gas boiler with water-cooling premixing planar burner |
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| CN (1) | CN117028964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387050A (en) * | 2023-12-08 | 2024-01-12 | 江苏四方清洁能源装备制造有限公司 | Vertical water pipe boiler suitable for water-cooling premixing planar burner |
-
2023
- 2023-09-20 CN CN202311216643.5A patent/CN117028964A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387050A (en) * | 2023-12-08 | 2024-01-12 | 江苏四方清洁能源装备制造有限公司 | Vertical water pipe boiler suitable for water-cooling premixing planar burner |
| CN117387050B (en) * | 2023-12-08 | 2024-02-27 | 江苏四方清洁能源装备制造有限公司 | Vertical water pipe boiler suitable for water-cooling premixing planar burner |
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