CN110864320A - Forced self-smoke-exhausting compact preheater - Google Patents
Forced self-smoke-exhausting compact preheater Download PDFInfo
- Publication number
- CN110864320A CN110864320A CN201911158547.3A CN201911158547A CN110864320A CN 110864320 A CN110864320 A CN 110864320A CN 201911158547 A CN201911158547 A CN 201911158547A CN 110864320 A CN110864320 A CN 110864320A
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- Prior art keywords
- smoke
- air
- heat exchanger
- flue gas
- deflector
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- 239000000779 smoke Substances 0.000 claims abstract description 113
- 239000011449 brick Substances 0.000 claims abstract description 43
- 238000007599 discharging Methods 0.000 claims abstract description 27
- 239000011819 refractory material Substances 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 95
- 239000003546 flue gas Substances 0.000 claims description 95
- 239000010902 straw Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003517 fume Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract description 2
- 238000005242 forging Methods 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 229910002065 alloy metal Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Air Supply (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a forced self-smoke-discharging compact preheater, which belongs to the technical field of industrial kilns and is matched with an industrial burner for use. The method is applicable to industrial furnaces and kilns in the industries of steel, nonferrous metal, machinery, aviation, forging, ceramics and the like. The invention comprises a heat exchanger, a smoke deflector, an air deflector, a preheater air shell and a smoke deflector brick, wherein the preheater air shell is arranged on the smoke deflector brick, one end of the air deflector is arranged on the preheater air shell, the other end of the air deflector is positioned in the smoke deflector brick, the heat exchanger is sleeved outside the air deflector, and the smoke deflector is matched with the heat exchanger. The forced self-smoke-discharging compact preheater is more compact in structure, flexible to use, larger in heat exchanger area, lower in smoke and air resistance, the smoke diversion brick is made of refractory materials, the smoke inlet in the smoke diversion brick in front of the heat exchanger is provided with the refractory baffle, and the service life of the heat exchanger is longer.
Description
Technical Field
The invention relates to a forced self-smoke-discharging compact preheater, which belongs to the technical field of industrial kilns and is matched with an industrial burner for use. The method is applicable to industrial furnaces and kilns in the industries of steel, nonferrous metal, machinery, aviation, forging, ceramics and the like.
Background
At present, most burners are matched with a centralized preheater or burners are provided with heat exchangers (also called self-preheating burners), smoke in the burners are configured with the centralized heat exchangers and flows intensively, the uniform temperature of furnace gas is difficult to ensure, the area of the heat exchangers for self-preheating burners is small, the heat exchange efficiency is low, the applicability is greatly limited, the power of the self-preheating burners is low, strong stirring cannot be formed on airflow in a large industrial kiln, the uniformity of the temperature in the furnace cannot be ensured, and the smoke of the current air preheater or self-preheating burners is large in air resistance, unsatisfactory in heat exchange effect, poor in high temperature resistance, short in service life, inflexible in application and influences popularization and application of the burners on the high-performance industrial kiln.
In view of this, a compact air preheater for a stirling engine external combustion system is disclosed in patent application No. 201810025678.3. The comparison file has the defects of difficulty in ensuring uniform temperature of furnace gas, low heat exchange efficiency and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the forced self-smoke-discharging compact preheater which is reasonable in structural design, flexible in application and long in service life, and the heat exchange area is increased, and the heat exchange capacity is improved.
The technical scheme adopted by the invention for solving the problems is as follows: this force from exhaust fume compact preheater, its structural feature lies in: the air preheater comprises a heat exchanger, a smoke deflector, an air deflector, a preheater air shell and a smoke deflector brick, wherein the preheater air shell is installed on the smoke deflector brick, one end of the air deflector is installed on the preheater air shell, the other end of the air deflector is located in the smoke deflector brick, the heat exchanger is sleeved outside the air deflector, and the smoke deflector is matched with the heat exchanger.
Further, the forced self-smoke-discharging compact preheater further comprises an air connecting tee joint and a smoke drainage cylinder, the air connecting tee joint is installed on an air shell of the preheater and sleeved outside the smoke drainage cylinder, and one end of the smoke drainage cylinder is matched with the smoke deflector.
Furthermore, the forced self-smoke-discharging compact preheater further comprises a smoke ejector and a smoke discharging cylinder, the smoke discharging cylinder is connected with the other end of the smoke guiding cylinder, and the smoke ejector is installed on the smoke guiding cylinder.
Further, the flue gas divertor is sleeved outside the heat exchanger.
Furthermore, the heat exchanger is provided with outer fins and inner fins, and the air flow guider is of a cylindrical structure.
Furthermore, the heat exchanger is provided with outer fins, the air deflector is of a cylindrical structure, the air deflector is provided with straw hat-shaped fins, the straw hat-shaped fins and the air deflector are coaxially arranged, and the parallel parts of the straw hat-shaped fins and the air deflector are arranged in a sieve mesh-shaped structure; the number of the straw hat-shaped fins is x, and x is more than or equal to 1.
Furthermore, the heat exchanger is provided with outer fins, the air deflector is of a double-layer cylindrical structure, and spiral fins are arranged on the air deflector; the number of the spiral fin rings is m, and the m is more than or equal to 1.
Furthermore, a cylindrical cavity is arranged on the flue gas diversion brick, a baffle is arranged at the outlet end of the cylindrical cavity, fan-shaped notches are arranged around the baffle and are arranged in a circumferential array, and a flue gas inlet channel is formed by the fan-shaped notches and the inner wall of the cylindrical cavity; the number of the fan-shaped notches is n, and n is more than or equal to 3.
Further, the shape of the flue gas diversion brick is round or rectangular.
Further, the flue gas diversion brick is made of refractory materials.
Further, a fan-shaped ring gap is formed between two adjacent baffles to be used as a flue gas inlet channel.
Compared with the prior art, the invention has the following advantages: the forced self-smoke-discharging compact preheater is more compact in structure, more flexible to use, larger in heat exchanger area, lower in smoke and air resistance, the smoke diversion brick is made of refractory materials, the smoke inlet in the smoke diversion brick in front of the heat exchanger is provided with the refractory baffle, high-temperature radiation is reduced, and the service life of the heat exchanger is longer. Meanwhile, the heat exchange area is increased, the heat exchange capability is enhanced, the power of a matched burner can be greatly improved, the burner and the exhaust gas are separated, the thermal short circuit is reduced, the airflow circulation in the furnace is promoted, the further energy conservation of the industrial furnace is promoted, and the temperature uniformity of the industrial furnace is improved, so that the development trend in the future is realized.
Drawings
Fig. 1 is a schematic sectional view of a forced self-exhaust compact preheater according to embodiment 1 of the present invention.
Fig. 2 is a schematic sectional view of a forced self-exhausting compact preheater according to embodiment 2 of the present invention.
Fig. 3 is a schematic sectional view of a forced self-exhaust smoke compact preheater according to embodiment 3 of the present invention.
Fig. 4 is a schematic structural view of a circular flue gas deflector brick according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a flue gas flow guiding brick of an embodiment of the invention in a rectangular shape.
In the figure: the device comprises a heat exchanger 1, a smoke deflector 2, an air deflector 3, a preheater air shell 4, an air connecting tee joint 5, a smoke guide cylinder 6, a smoke ejector 7, a smoke exhaust cylinder 8, smoke guide bricks 9, outer fins 10, inner fins 11, a cylindrical structure 12, a double-layer cylindrical structure 120, straw cap-shaped fins 121, spiral fins 122, a baffle 13, a fan-shaped notch 131, a first smoke channel 14, a second smoke channel 15, a third smoke channel 16, a fourth smoke channel 17, a fifth smoke channel 18, a first air channel 19, a second air channel 20, a third air channel 21 and a smoke inlet channel 22.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1 to 5, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical essence, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the present invention without affecting the functions and the achievable objectives of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
Example 1 (see fig. 1, 4, 5).
The forced self-smoke-discharging compact preheater in the embodiment comprises a heat exchanger 1, a smoke deflector 2, an air deflector 3, a preheater air shell 4, an air connecting tee joint 5, a smoke guide cylinder 6, a smoke ejector 7, a smoke discharging cylinder 8 and smoke guide bricks 9.
In the embodiment, the air casing 4 of the preheater is arranged on the smoke diversion brick 9, one end of the air deflector 3 is arranged on the air casing 4 of the preheater, the other end of the air deflector 3 is positioned in the smoke diversion brick 9, the heat exchanger 1 is sleeved outside the air deflector 3, the smoke deflector 2 is matched with the heat exchanger 1, and the smoke deflector 2 is sleeved outside the heat exchanger 1.
The air connecting tee joint 5 in the embodiment is arranged on an air shell 4 of the preheater, the air connecting tee joint 5 is sleeved outside the smoke guide cylinder 6, and one end of the smoke guide cylinder 6 is matched with the smoke deflector 2; the other end of the smoke exhaust cylinder 8 and the smoke guide cylinder 6 are connected, and the smoke ejector 7 is installed on the smoke guide cylinder 6. The heat exchanger 1 is provided with an outer fin 10 and an inner fin 11, and the air deflector 3 is of a cylindrical structure 12.
When the heat exchanger 1 adopts an inner fin structure and an outer fin structure, the air deflector 3 adopts a smooth cylindrical structure.
A cylindrical cavity is arranged on the flue gas diversion brick 9 in the embodiment, a baffle 13 is arranged at the outlet end of the cylindrical cavity, fan-shaped notches 131 are arranged around the baffle 13, the fan-shaped notches 131 are arranged in a circumferential array, and the fan-shaped notches 131 and the inner wall of the cylindrical cavity form a flue gas inlet channel 22; the number of the fan-shaped gaps 131 is n, n is more than or equal to 3, and the flue gas diversion bricks 9 are round or rectangular; the flue gas guide brick 9 is made of refractory material.
Specifically, the method comprises the following steps: the air shell 4 of the preheater and the flue gas guider 2 are installed and fixed on the flue gas guider 9 and are coaxial with each other, a first flue gas channel 14 is formed between the flue gas guider 9 and the heat exchanger 1, a second flue gas channel 15 is formed between the flue gas guider 2 and the heat exchanger 1, the flue gas is collected in a third flue gas channel 16 through an annular outer cylinder of the flue gas guider 2, an outlet of the annular outer cylinder of the flue gas guider 2 is butted with the flue gas guiding cylinder 6, the flue gas is injected into a fourth flue gas channel 17 through high-speed air at an outlet of the flue gas injector 7 and is mixed with the high-speed air injected from the flue gas injector 7 in a fifth flue gas channel 18 and then is discharged out of the smoke exhaust cylinder 8.
The air connecting tee joint 5 is sleeved outside the smoke guide cylinder 6 and connected with the air shell 4 of the preheater, air enters tangentially from the inlet of the air connecting tee joint 5, passes through a first air channel 19 formed between the air connecting tee joint 5 and the smoke guide cylinder 6, then flows through a second air channel 20 formed between the air shell 4 of the preheater and the smoke guide device 2, enters a third air channel 21 formed between the air guide device 3 and the heat exchanger 1, finally enters the inner cavity of the air guide device 3 and is discharged from the outlet of the air guide device 3.
The heat exchanger 1 is a tubular structure with fins, one end of the heat exchanger 1 is provided with a flange, the other end of the heat exchanger 1 is sealed by an end cover with a radian, the heat exchanger 1 is coaxial with the flue gas flow guider 2, the flue gas flow guider 2 is sleeved on the heat exchanger 1, the heat exchanger 1 is fixed at one end of the flue gas flow guider 2 through the flange, and the heat exchanger 1 is made of heat-resistant alloy metal materials or heat-resistant silicon carbide ceramic materials.
The air deflector 3 is arranged on an end cover at one end of the air shell 4 of the preheater through a flange, and the air deflector 3 is inserted into the inner cavity of the heat exchanger 1 and is coaxial with the heat exchanger 1.
The flue gas water conservancy diversion brick 9 is that the metal casing inside lining is refractory material, and refractory material is inside to have a cylindrical cavity, and the cylindrical cavity is arranged in to heat exchanger 1's one end to coaxial with the cylindrical cavity, and interior and heat exchanger 1 formation first flue gas passageway 14. The end part of the cylindrical cavity is provided with a baffle 13 made of refractory material, and a plurality of (n is more than or equal to 3) fan-shaped ring gaps 131 are uniformly arranged around the baffle 13. The fan ring gap 131 and the inner wall of the cylindrical cavity form a flue gas inlet channel 22.
Example 2 (see fig. 2, 4, 5).
The forced self-smoke-discharging compact preheater in the embodiment comprises a heat exchanger 1, a smoke deflector 2, an air deflector 3, a preheater air shell 4, an air connecting tee joint 5, a smoke guide cylinder 6, a smoke ejector 7, a smoke discharging cylinder 8 and smoke guide bricks 9.
In the embodiment, the air casing 4 of the preheater is arranged on the smoke diversion brick 9, one end of the air deflector 3 is arranged on the air casing 4 of the preheater, the other end of the air deflector 3 is positioned in the smoke diversion brick 9, the heat exchanger 1 is sleeved outside the air deflector 3, the smoke deflector 2 is matched with the heat exchanger 1, and the smoke deflector 2 is sleeved outside the heat exchanger 1.
The air connecting tee joint 5 in the embodiment is arranged on an air shell 4 of the preheater, the air connecting tee joint 5 is sleeved outside the smoke guide cylinder 6, and one end of the smoke guide cylinder 6 is matched with the smoke deflector 2; the other end of the smoke exhaust cylinder 8 and the smoke guide cylinder 6 are connected, and the smoke ejector 7 is installed on the smoke guide cylinder 6. The heat exchanger 1 is provided with an outer fin 10, the air deflector 3 is provided with a plurality of (x is more than or equal to 2) straw hat-shaped fins 121, and the straw hat-shaped fins 121 are coaxial with the air deflector 3. A third air channel 21 arranged in a labyrinth shape is formed between two adjacent straw hat-shaped fins 121. The air passes through the third air channel 21 in the shape of a labyrinth and then passes through the sieve holes of the straw hat-shaped fins for spraying and circulating.
When the heat exchanger 1 only adopts the structure of the inner fins 11, the air deflector 3 adopts an intermittent double-layer cylindrical structure, namely a structure of a plurality of straw hat-shaped fins 121; according to the structure, after air flow is collected through the interlayer between the straw hat-shaped fin 121 and the air guider 3, the air flow is vertically sprayed to the inner wall of the heat exchanger 1 along the straw hat-shaped fin screen holes, the air turbulence flow strength is maximum, air can effectively and fully perform forced heat exchange with the wall of the heat exchanger 1, the heat exchange efficiency is high, the heat exchange effect is best, but the structure has the defect of maximum air resistance.
A cylindrical cavity is arranged on the flue gas diversion brick 9 in the embodiment, a baffle 13 is arranged at the outlet end of the cylindrical cavity, fan-shaped notches 131 are arranged around the baffle 13, the fan-shaped notches 131 are arranged in a circumferential array, and the fan-shaped notches 131 and the inner wall of the cylindrical cavity form a flue gas inlet channel 22; the number of the fan-shaped gaps 131 is n, n is more than or equal to 3, and the flue gas diversion bricks 9 are round or rectangular; the flue gas guide brick 9 is made of refractory material.
Specifically, the method comprises the following steps: the air shell 4 of the preheater and the flue gas guider 2 are installed and fixed on the flue gas guider 9 and are coaxial with each other, a first flue gas channel 14 is formed between the flue gas guider 9 and the heat exchanger 1, a second flue gas channel 15 is formed between the flue gas guider 2 and the heat exchanger 1, the flue gas is collected in a third flue gas channel 16 through an annular outer cylinder of the flue gas guider 2, an outlet of the annular outer cylinder of the flue gas guider 2 is butted with the flue gas guiding cylinder 6, the flue gas is injected into a fourth flue gas channel 17 through high-speed air at an outlet of the flue gas injector 7 and is mixed with the high-speed air injected from the flue gas injector 7 in a fifth flue gas channel 18 and then is discharged out of the smoke exhaust cylinder 8.
The air connecting tee joint 5 is sleeved outside the smoke guide cylinder 6 and connected with the air shell 4 of the preheater, air enters tangentially from the inlet of the air connecting tee joint 5, passes through a first air channel 19 formed between the air connecting tee joint 5 and the smoke guide cylinder 6, then flows through a second air channel 20 formed between the air shell 4 of the preheater and the smoke guide device 2, enters a third air channel 21 formed between the air guide device 3 and the heat exchanger 1, finally enters the inner cavity of the air guide device 3 and is discharged from the outlet of the air guide device 3.
The heat exchanger 1 is a tubular structure with fins, one end of the heat exchanger 1 is provided with a flange, the other end of the heat exchanger 1 is sealed by an end cover with a radian, the heat exchanger 1 is coaxial with the flue gas flow guider 2, the flue gas flow guider 2 is sleeved on the heat exchanger 1, the heat exchanger 1 is fixed at one end of the flue gas flow guider 2 through the flange, and the heat exchanger 1 is made of heat-resistant alloy metal materials or heat-resistant silicon carbide ceramic materials.
The air deflector 3 is arranged on an end cover at one end of the air shell 4 of the preheater through a flange, and the air deflector 3 is inserted into the inner cavity of the heat exchanger 1 and is coaxial with the heat exchanger 1.
The flue gas water conservancy diversion brick 9 is that the metal casing inside lining is refractory material, and refractory material is inside to have a cylindrical cavity, and the cylindrical cavity is arranged in to heat exchanger 1's one end to coaxial with the cylindrical cavity, and interior and heat exchanger 1 formation first flue gas passageway 14. The end part of the cylindrical cavity is provided with a baffle 13, and the baffle 13 is uniformly provided with a plurality of (n is more than or equal to 3) fan-shaped ring gaps 131 as a flue gas inlet channel 22 along the periphery.
Example 3 (see fig. 3, 4, 5).
The forced self-smoke-discharging compact preheater in the embodiment comprises a heat exchanger 1, a smoke deflector 2, an air deflector 3, a preheater air shell 4, an air connecting tee joint 5, a smoke guide cylinder 6, a smoke ejector 7, a smoke discharging cylinder 8 and smoke guide bricks 9.
In the embodiment, the air casing 4 of the preheater is arranged on the smoke diversion brick 9, one end of the air deflector 3 is arranged on the air casing 4 of the preheater, the other end of the air deflector 3 is positioned in the smoke diversion brick 9, the heat exchanger 1 is sleeved outside the air deflector 3, the smoke deflector 2 is matched with the heat exchanger 1, and the smoke deflector 2 is sleeved outside the heat exchanger 1.
The air connecting tee joint 5 in the embodiment is arranged on an air shell 4 of the preheater, the air connecting tee joint 5 is sleeved outside the smoke guide cylinder 6, and one end of the smoke guide cylinder 6 is matched with the smoke deflector 2; the other end of the smoke exhaust cylinder 8 and the smoke guide cylinder 6 are connected, and the smoke ejector 7 is installed on the smoke guide cylinder 6. The heat exchanger 1 is provided with an outer fin 10, and the air deflector 3 is provided with a spiral fin 122. A third air channel 21 is formed between two adjacent outer fins 10.
When the heat exchanger 1 only adopts the structure of the outer fin 10, the air deflector 3 adopts the spiral fin 122. According to the structure, air flows along a spiral channel formed between the spiral fins 122 on the outer wall of the air deflector 3 and the surface of the air deflector 3 and the inner wall of the heat exchanger 1, the air circulation path is greatly increased, and air turbulence is enhanced, so that the heat exchange efficiency of the air and the heat exchanger is high, and finally, a section of fin deflector is arranged at the end part of the air deflector 3 and is uniformly distributed along the periphery of the air deflector cylinder to guide air flow to be changed into a direct-flow channel from spiral circulation so as to avoid the air from forming bias flow at the end part of the deflector cylinder.
A cylindrical cavity is arranged on the flue gas diversion brick 9 in the embodiment, a baffle 13 is arranged at the outlet end of the cylindrical cavity, fan-shaped notches 131 are arranged around the baffle 13, the fan-shaped notches 131 are arranged in a circumferential array, and the fan-shaped notches 131 and the inner wall of the cylindrical cavity form a flue gas inlet channel 22; the number of the fan-shaped gaps 131 is n, n is more than or equal to 3, and the flue gas diversion bricks 9 are round or rectangular; the flue gas guide brick 9 is made of refractory material.
Specifically, the method comprises the following steps: the air shell 4 of the preheater and the flue gas guider 2 are installed and fixed on the flue gas guider 9 and are coaxial with each other, a first flue gas channel 14 is formed between the flue gas guider 9 and the heat exchanger 1, a second flue gas channel 15 is formed between the flue gas guider 2 and the heat exchanger 1, the flue gas is collected in a third flue gas channel 16 through an annular outer cylinder of the flue gas guider 2, an outlet of the annular outer cylinder of the flue gas guider 2 is butted with the flue gas guiding cylinder 6, the flue gas is injected into a fourth flue gas channel 17 through high-speed air at an outlet of the flue gas injector 7 and is mixed with the high-speed air injected from the flue gas injector 7 in a fifth flue gas channel 18 and then is discharged out of the smoke exhaust cylinder 8.
The air connecting tee joint 5 is sleeved outside the smoke guide cylinder 6 and connected with the air shell 4 of the preheater, air enters tangentially from the inlet of the air connecting tee joint 5, passes through a first air channel 19 formed between the air connecting tee joint 5 and the smoke guide cylinder 6, then flows through a second air channel 20 formed between the air shell 4 of the preheater and the smoke guide device 2, enters a third air channel 21 formed between the air guide device 3 and the heat exchanger 1, finally enters the inner cavity of the air guide device 3 and is discharged from the outlet of the air guide device 3.
The heat exchanger 1 is a tubular structure with fins, one end of the heat exchanger 1 is provided with a flange, the other end of the heat exchanger 1 is sealed by an end cover with a radian, the heat exchanger 1 is coaxial with the flue gas flow guider 2, the flue gas flow guider 2 is sleeved on the heat exchanger 1, the heat exchanger 1 is fixed at one end of the flue gas flow guider 2 through the flange, and the heat exchanger 1 is made of heat-resistant alloy metal materials or heat-resistant silicon carbide ceramic materials.
The air deflector 3 is arranged on an end cover at one end of the air shell 4 of the preheater through a flange, and the air deflector 3 is inserted into the inner cavity of the heat exchanger 1 and is coaxial with the heat exchanger 1.
The flue gas water conservancy diversion brick 9 is that the metal casing inside lining is refractory material, and refractory material is inside to have a cylindrical cavity, and the cylindrical cavity is arranged in to heat exchanger 1's one end to coaxial with the cylindrical cavity, and interior and heat exchanger 1 formation first flue gas passageway 14. The end part of the cylindrical cavity is provided with a baffle 13 made of refractory material, and a plurality of (n is more than or equal to 3) sector ring gaps 131 are uniformly arranged around the baffle 13 and are used as flue gas inlet channels 22.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The utility model provides a force from exhaust fume compact preheater which characterized in that: including heat exchanger (1), flue gas divertor (2), air divertor (3), pre-heater air casing (4) and flue gas water conservancy diversion brick (9), install on flue gas water conservancy diversion brick (9) pre-heater air casing (4), the one end of air divertor (3) is installed on pre-heater air casing (4), the other end of air divertor (3) is located flue gas water conservancy diversion brick (9), heat exchanger (1) suit is outside air divertor (3), flue gas divertor (2) and heat exchanger (1) cooperation.
2. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the forced self-smoke-discharging compact preheater further comprises an air connecting tee joint (5) and a smoke guide cylinder (6), wherein the air connecting tee joint (5) is installed on the air shell (4) of the preheater and the air connecting tee joint (5) is sleeved outside the smoke guide cylinder (6), and one end of the smoke guide cylinder (6) is matched with the smoke guider (2).
3. A forced self-exhausting compact preheater according to claim 2, wherein: the forced self-smoke-discharging compact preheater further comprises a smoke ejector (7) and a smoke discharging cylinder (8), the smoke discharging cylinder (8) is connected with the other end of the smoke guiding cylinder (6), and the smoke ejector (7) is installed on the smoke guiding cylinder (6).
4. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the flue gas fluid director (2) is sleeved outside the heat exchanger (1).
5. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the heat exchanger (1) is provided with outer fins (10) and inner fins (11), and the air flow guider (3) is of a cylindrical structure (12).
6. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the heat exchanger (1) is provided with outer fins (10), the air deflector (3) is of a cylindrical structure (12), the air deflector (3) is provided with straw hat-shaped fins (121), the straw hat-shaped fins (121) and the air deflector (3) are coaxially arranged, and the parallel parts of the straw hat-shaped fins (121) and the air deflector (3) are arranged in a sieve mesh-shaped structure; the number of the straw hat-shaped fins (121) is x, and x is more than or equal to 1.
7. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the heat exchanger (1) is provided with outer fins (10), the air flow guider (3) is of a double-layer cylindrical structure (120), and the air flow guider (3) is provided with spiral fins (122); the number of the spiral fin rings is m, and the m is more than or equal to 1.
8. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: a cylindrical cavity is arranged on the flue gas diversion brick (9), a baffle (13) is arranged at the outlet end of the cylindrical cavity, fan-shaped notches (131) are arranged around the baffle (13), the fan-shaped notches (131) are arranged in a circumferential array, and the fan-shaped notches (131) and the inner wall of the cylindrical cavity form a flue gas inlet channel (22); the number of the fan-shaped notches (131) is n, and n is more than or equal to 3.
9. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the shape of the smoke diversion brick (9) is round or rectangular.
10. A forced self-smoke-discharging compact preheater according to claim 1, characterized in that: the flue gas diversion brick (9) is made of refractory materials.
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| CN2019218632165 | 2019-10-31 | ||
| CN201921863216 | 2019-10-31 |
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| CN201911158547.3A Active CN110864320B (en) | 2019-10-31 | 2019-11-22 | Forced self-smoke-discharging compact preheater |
| CN201922046636.0U Active CN211424447U (en) | 2019-10-31 | 2019-11-22 | Forced self-smoke-discharging compact preheater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115234933A (en) * | 2022-06-06 | 2022-10-25 | 江苏瑞鼎环境工程有限公司 | Smoke exhaust waste heat recycling device for gas steam boiler and utilization method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110864320B (en) * | 2019-10-31 | 2024-09-17 | 杭州中景科技有限公司 | Forced self-smoke-discharging compact preheater |
| CN113531528B (en) * | 2021-07-23 | 2024-04-12 | 杭州中景科技有限公司 | Low-NOx self-preheating radiant tube burner with smoke backflow diffusion and method |
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Also Published As
| Publication number | Publication date |
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| CN211424447U (en) | 2020-09-04 |
| CN110864320B (en) | 2024-09-17 |
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