CN114251677A - Flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature - Google Patents

Flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature Download PDF

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Publication number
CN114251677A
CN114251677A CN202111517946.1A CN202111517946A CN114251677A CN 114251677 A CN114251677 A CN 114251677A CN 202111517946 A CN202111517946 A CN 202111517946A CN 114251677 A CN114251677 A CN 114251677A
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China
Prior art keywords
partition plate
pipe
gas chamber
gas
plate
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CN202111517946.1A
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Chinese (zh)
Inventor
孟心宇
姚水良
李晶
史宇亮
刘丹丹
王茜
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Changzhou University
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Changzhou University
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Priority to CN202111517946.1A priority Critical patent/CN114251677A/en
Publication of CN114251677A publication Critical patent/CN114251677A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/06—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate without any visible flame
    • F24C3/067—Ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/18—Radiant burners using catalysis for flameless combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Burners (AREA)

Abstract

The invention discloses a flameless catalytic combustion cooking bench, which comprises a cooking range table top, a gas flow distributor arranged on the lower surface of the cooking range table top, a first gas chamber arranged at the bottom of the gas flow distributor and communicated with the gas flow distributor, a second gas chamber arranged in the first gas chamber, a first air pipe communicated with the first gas chamber, a gas pipe and a second air pipe, wherein the gas pipe and the second air pipe are respectively extended into the first gas chamber and communicated with the second gas chamber; the gas flow distributor comprises a vertical pipe, a bottom plate, a partition plate and a connecting plate, and is connected to form a gas countercurrent channel, and a gas outlet pipe is arranged on the pipe wall; a heating catalytic igniter is arranged in the second gas chamber, and the heating catalytic igniter comprises a catalyst layer positioned on the upper side and a heating part positioned on the lower side; the tops of the first gas chamber and the second gas chamber are communicated with the first through hole. The invention has the advantage of uniform temperature distribution on the table surface of the stove.

Description

Flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature
Technical Field
The invention relates to a flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature.
Background
From the viewpoint of energy utilization and environmental protection, the catalytic combustion technology is an effective measure for realizing combustion of combustible gases such as natural gas. The catalysts for catalytic combustion of natural gas generally comprise two types, namely noble metals (Pd, Pt and the like) and non-noble metals (perovskite, composite or doped oxides and the like). The noble metal has strong activation capability on C-H bonds, and simultaneously effectively activates natural gas methane to convert the methane, thereby showing the characteristic of high catalytic efficiency, but the noble metal is not seen to be used for a cooking bench.
Combustion cooktop devices using natural gas are also becoming widespread, but still have some problems: for example, in a flameless gas range (CN 110118365A), an ignition device is used to generate a pre-flame, and since the flame temperature is high, usually 1200 ℃ or higher, nitrogen oxide (NOx) is generated at the high temperature, the gas flow resistance is increased by using straight tube catalysis, and the temperature of the heat transfer surface is very uneven by using unidirectional gas flow.
Disclosure of Invention
In order to solve the problems that the ignition temperature is high because the catalytic combustion technology is not used for a cooking bench, pollutants of nitrogen oxide are generated during combustion of the conventional flameless gas stove, and the temperature distribution of the cooking bench is extremely uneven, the inventor provides a flameless catalytic combustion cooking bench which has unidirectional heat transfer and is even in temperature through long-term research.
The invention relates to a flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature, which comprises a cooking range top, a gas flow distributor connected to the lower surface of the cooking range top, a first gas chamber arranged at the bottom of the gas flow distributor and communicated with the gas flow distributor, a second gas chamber arranged in the first gas chamber, a first air pipe communicated with the first gas chamber, a gas pipe and a second air pipe, wherein the gas pipe and the second air pipe are respectively extended into the first gas chamber and communicated with the second gas chamber;
the gas flow distributor comprises: the kitchen range comprises a vertical pipe, a bottom plate fixed at the lower end of the vertical pipe, a partition plate and a connecting plate, wherein the partition plate and the connecting plate are arranged in the vertical pipe and are vertically connected with the bottom plate; the partition plate comprises a first partition plate, a second C-shaped partition plate and a third C-shaped partition plate, the first partition plate is rectangular, one side edge of the first partition plate is connected with the wall of the vertical pipe, and the other side edge of the first partition plate is positioned at the edge of the first through hole; the second C-shaped partition plate and the third C-shaped partition plate are coaxially arranged by taking the axis of the first through hole as an axis, the third C-shaped partition plate is positioned between the second C-shaped partition plate and the pipe wall of the vertical pipe, and the first partition plate extends into the openings of the two C-shaped partition plates; the connecting plates comprise a first connecting plate, a second connecting plate and arc-shaped connecting plates, the first connecting plate is connected between one opening edge of the second C-shaped partition plate and the wall of the vertical pipe, the second connecting plate is connected between one opening edge of the third C-shaped partition plate and the edge of the first through hole, the first connecting plate and the second connecting plate are positioned on two sides of the first partition plate, the arc-shaped connecting plates are connected between the first partition plate and the second connecting plate and are U-shaped, the first through hole is positioned in the U shape and is positioned at the bottom of a channel formed by connecting the first partition plate, the second connecting plate and the arc-shaped connecting plates, the wall of the vertical pipe, the three partition plates and the three connecting plates form a gas countercurrent channel, and an air outlet pipe is arranged at the upper end part of the wall of the vertical pipe positioned between the first connecting plate and the first partition plate and serves as an outlet of the gas countercurrent channel;
the second gas chamber top plate is provided with a hollowed-out hole channel which is communicated with the first through hole, the upper part in the second gas chamber is provided with a heating and catalyzing burner, the heating and catalyzing burner comprises a catalyst layer positioned on the upper side and a heating part positioned on the lower side, the catalyst layer is fully distributed with holes penetrating through the catalyst layer, and the pipe orifices of the fuel gas pipe and the second air pipe are positioned below the heating and catalyzing burner.
The gas flow cross section area of the catalyst layer is as large as possible, and the thickness in the flow direction is as small as possible, so that the gas flow resistance is reduced; the heating part can be a resistance heater, and the heating temperature is 100-500 ℃; under the catalytic action of the catalyst layer, the mixed gas can be ignited at the temperature of 100-500 ℃, which is far lower than the temperature for generating oxynitride, so oxynitride can not be generated at the temperature.
A flameless catalytic combustion cooking bench with single-direction heat transfer and uniform temperature comprises a cooking range top, a gas flow distributor connected to the lower surface of the cooking range top, a first gas chamber installed at the bottom of the gas flow distributor and communicated with the gas flow distributor, a second gas chamber arranged in the first gas chamber, a first air pipe communicated with the first gas chamber, a gas pipe and a second air pipe which respectively extend into the first gas chamber and are communicated with the second gas chamber, and a space is arranged between the outer wall of the second gas chamber and the inner wall of the first gas chamber for air from the first air pipe to enter the gas flow distributor;
the gas flow distributor comprises: the kitchen range comprises a vertical pipe, a bottom plate fixed at the lower end of the vertical pipe, a partition plate and a connecting plate, wherein the partition plate and the connecting plate are arranged in the vertical pipe and are vertically connected with the bottom plate; the partition plate comprises a first partition plate, a second C-shaped partition plate and a third C-shaped partition plate, the first partition plate is rectangular, one side edge of the first partition plate is connected with the wall of the vertical pipe, and the other side edge of the first partition plate is positioned at the edge of the first through hole; the second C-shaped partition plate and the third C-shaped partition plate are coaxially arranged by taking the axis of the first through hole as an axis, the third C-shaped partition plate is positioned between the second C-shaped partition plate and the pipe wall of the vertical pipe, and the first partition plate extends into the openings of the two C-shaped partition plates; the connecting plates comprise a third connecting plate and a fourth connecting plate, the third connecting plate is connected between one opening edge of the second C-shaped partition plate and the first partition plate, the fourth connecting plate is connected between one opening edge of the third C-shaped partition plate and the first partition plate, and the third connecting plate and the fourth connecting plate are respectively positioned on two sides of the first partition plate; the upper end part of the vertical pipe wall opposite to the fourth connecting plate is provided with an air outlet pipe which is used as an outlet of the gas countercurrent passage;
the second gas chamber top plate is provided with a hollowed-out hole channel which is communicated with the first through hole, the upper part in the second gas chamber is provided with a heating and catalyzing burner, the heating and catalyzing burner comprises a catalyst layer positioned on the upper side and a heating part positioned on the lower side, the catalyst layer is fully distributed with holes penetrating through the catalyst layer, and the pipe orifices of the fuel gas pipe and the second air pipe are positioned below the heating and catalyzing burner.
A flameless catalytic combustion cooking bench with single-direction heat transfer and uniform temperature comprises a cooking range top, a gas flow distributor connected to the lower surface of the cooking range top, a first gas chamber installed at the bottom of the gas flow distributor and communicated with the gas flow distributor, a second gas chamber arranged in the first gas chamber, a first air pipe communicated with the first gas chamber, a gas pipe and a second air pipe which respectively extend into the first gas chamber and are communicated with the second gas chamber, and a space is arranged between the outer wall of the second gas chamber and the inner wall of the first gas chamber for air from the first air pipe to enter the gas flow distributor;
the gas flow distributor comprises: the kitchen range comprises a vertical pipe, a bottom plate fixed at the lower end of the vertical pipe, a partition plate and a connecting plate, wherein the partition plate and the connecting plate are arranged in the vertical pipe and are vertically connected with the bottom plate; the partition plate comprises a first partition plate, a second C-shaped partition plate and a third C-shaped partition plate, the first partition plate is rectangular, one side edge of the first partition plate is connected with the wall of the vertical pipe, and the other side edge of the first partition plate is positioned at the edge of the first through hole; the second C-shaped partition plate and the third C-shaped partition plate are coaxially arranged by taking the axis of the first through hole as an axis, the third C-shaped partition plate is positioned between the second C-shaped partition plate and the pipe wall of the vertical pipe, and the first partition plate extends into the openings of the two C-shaped partition plates; the connecting plate comprises a fifth connecting plate and a sixth connecting plate, the fifth connecting plate connects one opening edge of the second C-shaped partition plate and one opening edge of the third C-shaped partition plate which are positioned on the same side of the first partition plate to form a sealing end, and a bottom plate on which the sealing end is positioned is provided with a second through hole for supplying air to the sealing end; the sixth connecting plate connects one opening edge of the third C-shaped partition plate on the other side of the first partition plate with the first partition plate; the upper end part of the vertical pipe wall opposite to the sixth connecting plate is provided with an air outlet pipe which is used as an outlet of the gas countercurrent passage; the top of the first gas chamber is branched and is respectively communicated with the first through hole and the second through hole;
the second gas chamber top plate is provided with a hollowed-out hole channel which is communicated with the first through hole, the upper part in the second gas chamber is provided with a heating and catalyzing burner, the heating and catalyzing burner comprises a catalyst layer positioned on the upper side and a heating part positioned on the lower side, the catalyst layer is fully distributed with holes penetrating through the catalyst layer, and the pipe orifices of the fuel gas pipe and the second air pipe are positioned below the heating and catalyzing burner.
In order to reduce the upward resistance of the gas, the upper part of the first gas chamber is a gradual change section, the upward diameter of the gradual change section is gradually reduced, and the port of the gradual change section is communicated with the first through hole; the second air chamber is offset in the first air chamber, the first air tube branches off in the first air chamber, the second air tube is located in the first air chamber, one end is communicated with the second air chamber, and the other end is communicated with one branch of the first air tube.
In order to improve the heat utilization rate, the lower side of the cooking stove table surface is provided with a heat insulation layer which wraps the gas flow distributor and the first gas chamber and is insulated from the outside, so that heat can be transferred to the cookware on the cooking stove table surface only through the cooking stove table surface. The thermal insulation layer can be a vacuum wall or a quartz glass wool thermal insulation material.
In order to improve the catalytic effect, the catalyst of the catalyst layer comprises a carrier and an active ingredient, wherein the carrier adopts a high-temperature resistant spherical or honeycomb carrier, such as alumina balls, molecular sieve balls or honeycomb ceramics, and the active ingredient adopts precious metal oxide or/and base metal oxide.
In order to further improve the catalytic effect, the carrier is alumina balls, and the active component is CuO-CeO2。
Has the advantages that: the flameless catalytic combustion cooking bench of the invention adopts a gas flow distributor with a gas counter-flow channel to promote the heat exchange between gas flow layers and provideThe heat flow with uniform temperature distribution is supplied to the table top of the stove, so that the temperature on the table top of the stove is uniformly distributed, and the heat utilization efficiency of the gas stove is improved; the mixed gas is ignited at the temperature of 100-500 ℃ by adopting a heating catalytic igniter without generating oxynitride; the upper part of the first gas chamber is set to be a transition section, the diameter of the transition section is gradually reduced towards the upper part, and the port of the transition section is communicated with the first through hole, so that the upward resistance of the gas is reduced; material is saved by offsetting the second gas chamber in the first gas chamber, the first air tube branching off in the first gas chamber, the second air tube being located in the first gas chamber with one end communicating with the second gas chamber and the other end communicating with one branch of the first air tube; the heat insulation layer is arranged at the lower side of the stove table board, and the gas flow distributor and the first gas chamber are wrapped to insulate heat with the outside, so that heat can be transferred to a pan on the stove table board only through the stove table board, and the heat utilization rate is improved; the catalyst of the catalyst layer comprises a carrier and an active ingredient, wherein the carrier is a high-temperature-resistant spherical or honeycomb carrier, and the active ingredient is a noble metal oxide or/and a base metal oxide, so that the catalytic effect is improved; the carrier is alumina ball, and the active component is CuO-CeO2Thereby further improving the catalytic effect.
Drawings
FIG. 1 is a schematic structural view of a flameless catalytic combustion cooking bench according to the present invention;
FIG. 2 is a schematic structural view of the flameless catalytic combustion cooking bench of the present invention without a thermal insulation layer;
FIG. 3 is a cross-sectional view of the gas flow distributor of example 1 taken along line AA in FIG. 2;
FIG. 4 is a diagram of the gas flow path within the gas flow distributor of example 1;
FIG. 5 is a top view showing the internal structure of a gas flow distributor according to example 2
FIG. 6 is a diagram of the gas flow path within the gas flow distributor of example 2;
FIG. 7 is a top view of the internal structure of the gas flow distributor of example 3;
FIG. 8 is a diagram of the gas flow path within the gas flow distributor of example 3;
FIG. 9 is a top view of the interior of the first gas chamber;
in the figure, 1, a stove top; 2. a gas flow distributor; 21. a vertical tube; 22. a base plate; 221. a first through hole; 222. a second through hole; 23. a partition plate; 231. a first partition plate; 232. a second C-shaped partition plate; 233. a third C-shaped partition plate; 24. a connecting plate; 241. a first connecting plate; 242. a second connecting plate; 243. an arc-shaped connecting plate; 244. a third connecting plate; 245. a fourth connecting plate; 246. a fifth connecting plate; 247. a sixth connecting plate; 3. a first gas chamber; 4. a second gas chamber; 5. a gas pipe; 6. a first air tube; 7. a second air tube; 8. an air outlet pipe; 9. heating the catalytic burner; 91. a catalyst layer; 92. a heating section; 10. a thermal insulation layer; 2A, a first gas flow distributor; 2B, a second gas flow distributor; 2C, a third gas flow distributor.
Detailed Description
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.
Example 1
As shown in fig. 1 and 2, a flameless catalytic combustion cooking bench having a unidirectional heat transfer and a uniform temperature includes a cooking range top 1, a gas flow distributor 2 (specifically, a first gas flow distributor 2A) connected to a lower surface of the cooking range top 1, a first gas chamber 3 installed at a bottom of the first gas flow distributor 2A and communicating with the first gas flow distributor 2A, a second gas chamber 4 disposed in the first gas chamber 3, a first air pipe 6 communicating with the first gas chamber 3, a gas pipe 5 extending into the first gas chamber 3 and communicating with the second gas chamber 4, and a second air pipe 7 located in the first gas chamber 3 and having one end communicating with the second gas chamber 4 and the other end communicating with the first air pipe 6. Of course, in other embodiments, the second air tube 7 may be provided independently, for example, extending into the first air chamber 3 to communicate with the second air chamber 4. The lower part of the first gas chamber 3 is tubular, the upper part is a gradual change section, and the diameter of the gradual change section gradually decreases upwards. The second air chamber 4 is offset in the first air chamber 3, the first air pipe 6 is branched in the first air chamber 3, and one end of the second air pipe 7 remote from the second air chamber 4 is communicated with one of the branched pipes of the first air pipe 6. Between the outer wall of the second gas chamber 4 and the inner wall of the first gas chamber 3 there is a space for the air from the first air pipe 6 to enter the first gas flow distributor 2A for temperature regulation.
The first gas flow distributor 2A, as shown in fig. 3, comprises: the device comprises a vertical pipe 21, a bottom plate 22 fixed at the lower end of the vertical pipe 21, three partition plates 23 and three connecting plates 24 which are arranged in the vertical pipe 21 and vertically connected with the bottom plate 22, wherein a first through hole 221 is formed in the center of the bottom plate 22; the upper end surface of the vertical pipe 21, the top edges of the partition plate 23 and the connecting plate 24 are all connected with the lower surface of the stove table top 1; the partition plate 23 comprises a first partition plate 231, a second C-shaped partition plate 232 and a third C-shaped partition plate 233, the first partition plate 231 is rectangular, one side edge is connected with the tube wall of the vertical tube 21, and the other side edge is positioned at the edge of the first through hole 221; the second C-shaped partition plate 232 and the third C-shaped partition plate 233 are coaxially arranged by taking the axis of the first through hole 221 as an axis, the third C-shaped partition plate 233 is positioned between the second C-shaped partition plate 232 and the pipe wall of the vertical pipe 21 and has equal distance, and the first partition plate 231 extends into the openings of the two C-shaped partition plates; the connecting plate 24 includes a first connecting plate 241, a second connecting plate 242 and an arc-shaped connecting plate 243, the first connecting plate 241 is connected between one opening edge of the second C-shaped partition plate 232 and the tube wall of the standpipe 21, the second connecting plate 242 is connected between one opening edge of the third C-shaped partition plate 233 and the edge of the first through hole 221, the first connecting plate 241 and the second connecting plate 242 are located on both sides of the first partition plate 231 and are parallel to the first partition plate 231, the arc-shaped connecting plate 243 is connected between the first partition plate 231 and the second connecting plate 242 and is U-shaped, the first through hole 221 is located in the U-shape and is located at the bottom of the channel formed by connecting the first partition plate 231, the second connecting plate 242 and the arc-shaped connecting plate 243; the tube wall of the standpipe 21, the first partition plate 231, the two C-shaped partition plates and the three connecting plates form a gas countercurrent channel, and a gas flow path is shown in FIG. 4; an outlet pipe 8 is provided at the upper end of the wall of the standpipe 21 between the first connecting plate 241 and the first partition plate 231 as an outlet of the gas counterflow channel. The first connecting plate 241 and the second connecting plate 242 are arranged in parallel, which improves the uniformity of the air flow.
Of transition sections of the first gas chamber 3The port is communicated with the first through hole 221, the second gas chamber 4 is tubular, the top of the second gas chamber is provided with a top plate, and the top plate is provided with a hollow hole channel which is communicated with the first through hole 221. The structure of the interior of the first gas chamber is shown in fig. 9. A heating catalyst burner 9 is provided in an upper portion of the second gas chamber 4, the heating catalyst burner 9 includes a catalyst layer 91 on an upper side and a heating portion 92 on a lower side, a hole penetrating the catalyst layer 91 is formed in the catalyst layer 91, and nozzles of the gas pipe 5 and the second air pipe 7 are located below the heating catalyst burner 9. The area of the catalyst layer 91 is equal to the area of the ceiling inner surface of the second gas chamber 4; the catalyst of the catalyst layer 91 includes a carrier and an active component, the carrier is high temperature resistant alumina balls, and the active component is CuO-CeO2. The heating unit 92 is a resistance heater, and the heating temperature is set to 350 ℃.
The lower side of the stove top 1 is provided with a heat insulation layer 10, the first gas flow distributor 2A and the first gas chamber 3 are wrapped and insulated with the outside, the heat insulation layer 10 is made of quartz glass wool heat insulation materials, and the structure of the flameless catalytic combustion stove wrapped with the heat insulation layer is shown in figure 1.
In practical use, air is introduced into the second air pipe 7 and the first gas chamber 3 through the first air pipe 6, the air passing through the second air pipe 7 enters the second gas chamber 4, fuel gas is introduced into the second gas chamber 4 through the fuel gas pipe 5, the air and the fuel gas are mixed in the second gas chamber 4, the mixture is heated to 100-. The air entering the first gas chamber 3 can also be temperature regulated by passing it directly into the first gas flow distributor 2A through the space between the outer wall of the second gas chamber 4 and the inner wall of the first gas chamber 3. The methane catalytic combustion efficiency of the flameless catalytic combustion cooking bench can reach more than 99 percent at most. The methane and air flow are controlled, the temperature of the stove top can be controlled at 500 ℃ below 100 ℃, and the stable and uniformly distributed temperature of the stove top is realized.
Example 2
In embodiment 1, the three connection plates in the first gas flow distributor 2A are replaced with two, that is, a third connection plate 244 and a fourth connection plate 245, and the three connection plates are reconnected, the third connection plate 244 is connected between one opening edge of the second C-shaped partition plate 232 and the first partition plate 231, the fourth connection plate 245 is connected between one opening edge of the third C-shaped partition plate 233 and the first partition plate 231, the third connection plate 244 and the fourth connection plate 245 are respectively located on both sides of the first partition plate 231, and the outlet pipe 8 is provided at the upper end portion of the pipe wall of the standpipe 21 opposite to the fourth connection plate 245. Except for this, a second gas flow distributor 2B was obtained in the same manner as in example 1, and the second gas flow distributor 2B of this example was configured as shown in fig. 5, and the gas flow paths were as shown in fig. 6.
Example 3
In embodiment 1, the three connecting plates in the first gas flow distributor 2A are changed into two, that is, the fifth connecting plate 246 and the sixth connecting plate 247 and reconnected, the fifth connecting plate 246 connects one opening edge of the second C-shaped partition plate 232 and one opening edge of the third C-shaped partition plate 233 on the same side as the first partition plate 231 to form a sealed end, and the second through-hole 222 for supplying gas to the sealed end is provided in the bottom plate 22 where the sealed end is located; the sixth connecting plate 247 connects one opening edge of the third C-shaped partition plate 233 at the other side of the first partition plate 231 with the first partition plate 231; an air outlet pipe 8 is arranged at the upper end part of the pipe wall of the vertical pipe 21 opposite to the sixth connecting plate 247; the top of the first gas chamber 3 is branched and communicated with the first through hole 221 and the second through hole 222, respectively. Except for this, a third gas flow distributor 2C was obtained in the same manner as in example 1, and the third gas flow distributor 2C of this example was configured as shown in fig. 7, and the gas flow paths were as shown in fig. 8.
The above-mentioned techniques not specifically mentioned refer to the prior art.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. The flameless catalytic combustion cooking bench is characterized by comprising a cooking range top (1), a gas flow distributor (2) connected to the lower surface of the cooking range top (1), a first gas chamber (3) installed at the bottom of the gas flow distributor (2) and communicated with the gas flow distributor (2), a second gas chamber (4) arranged in the first gas chamber (3), a first air pipe (6) communicated with the first gas chamber (3), a gas pipe (5) and a second air pipe (7) which respectively extend into the first gas chamber (3) and are communicated with the second gas chamber (4), wherein a space is formed between the outer wall of the second gas chamber (4) and the inner wall of the first gas chamber (3) for air from the first air pipe (6) to enter the gas flow distributor (2);
the gas flow distributor (2) comprises: the device comprises a vertical pipe (21), a bottom plate (22) fixed at the lower end of the vertical pipe (21), a partition plate (23) and a connecting plate (24) which are arranged in the vertical pipe (21) and vertically connected with the bottom plate (22), wherein a first through hole (221) is formed in the center of the bottom plate (22); the partition plate (23) comprises a first partition plate (231), a second C-shaped partition plate (232) and a third C-shaped partition plate (233), the first partition plate (231) is rectangular, one side edge is connected with the tube wall of the vertical tube (21), and the other side edge is positioned at the edge of the first through hole (221); the second C-shaped partition plate (232) and the third C-shaped partition plate (233) are coaxially arranged by taking the axis of the first through hole (221) as an axis, the third C-shaped partition plate (233) is positioned between the second C-shaped partition plate (232) and the pipe wall of the vertical pipe (21), and the first partition plate (231) extends into the openings of the two C-shaped partition plates; the connecting plate (24) comprises a first connecting plate (241), a second connecting plate (242) and an arc-shaped connecting plate (243), the first connecting plate (241) is connected between one opening edge of the second C-shaped partition plate (232) and the pipe wall of the vertical pipe (21), the second connecting plate (242) is connected between one opening edge of the third C-shaped partition plate (233) and the edge of the first through hole (221), the first connecting plate (241) and the second connecting plate (242) are located on two sides of the first partition plate (231), the arc-shaped connecting plate (243) is connected between the first partition plate (231) and the second connecting plate (242) and is U-shaped, the first through hole (221) is located in the U shape and is located at the bottom of a channel formed by connecting the first partition plate (231), the second connecting plate (242) and the arc-shaped connecting plate (243); the pipe wall of the vertical pipe (21), the three partition plates and the three connecting plates form a gas countercurrent channel, and an air outlet pipe (8) is arranged at the upper end part of the pipe wall of the vertical pipe (21) between the first connecting plate (241) and the first partition plate (231) and is used as an outlet of the gas countercurrent channel;
the top plate of the second gas chamber (4) is provided with a hollowed-out hole channel which is communicated with the first through hole (221), the upper part in the second gas chamber (4) is provided with a heating catalytic burner (9), the heating catalytic burner (9) comprises a catalyst layer (91) positioned on the upper side and a heating part (92) positioned on the lower side, the catalyst layer (91) is fully distributed with holes penetrating through the catalyst layer (91), and the gas pipe (5) and the pipe orifice of the second air pipe (7) are positioned below the heating catalytic burner (9).
2. The flameless catalytic combustion cooking bench is characterized by comprising a cooking range top (1), a gas flow distributor (2) connected to the lower surface of the cooking range top (1), a first gas chamber (3) installed at the bottom of the gas flow distributor (2) and communicated with the gas flow distributor (2), a second gas chamber (4) arranged in the first gas chamber (3), a first air pipe (6) communicated with the first gas chamber (3), a gas pipe (5) and a second air pipe (7) which respectively extend into the first gas chamber (3) and are communicated with the second gas chamber (4), wherein a space is formed between the outer wall of the second gas chamber (4) and the inner wall of the first gas chamber (3) for air from the first air pipe (6) to enter the gas flow distributor (2);
the gas flow distributor (2) comprises: the device comprises a vertical pipe (21), a bottom plate (22) fixed at the lower end of the vertical pipe (21), a partition plate (23) and a connecting plate (24) which are arranged in the vertical pipe (21) and vertically connected with the bottom plate (22), wherein a first through hole (221) is formed in the center of the bottom plate (22); the partition plate (23) comprises a first partition plate (231), a second C-shaped partition plate (232) and a third C-shaped partition plate (233), the first partition plate (231) is rectangular, one side edge is connected with the tube wall of the vertical tube (21), and the other side edge is positioned at the edge of the first through hole (221); the second C-shaped partition plate (232) and the third C-shaped partition plate (233) are coaxially arranged by taking the axis of the first through hole (221) as an axis, the third C-shaped partition plate (233) is positioned between the second C-shaped partition plate (232) and the pipe wall of the vertical pipe (21), and the first partition plate (231) extends into the openings of the two C-shaped partition plates; the connecting plate (24) comprises a third connecting plate (244) and a fourth connecting plate (245), the third connecting plate (244) is connected between one opening edge of the second C-shaped partition plate (232) and the first partition plate (231), the fourth connecting plate (245) is connected between one opening edge of the third C-shaped partition plate (233) and the first partition plate (231), and the third connecting plate (244) and the fourth connecting plate (245) are respectively positioned on two sides of the first partition plate (231); the pipe wall of the vertical pipe (21), the three partition plates and the two connecting plates form a gas countercurrent channel, and an air outlet pipe (8) is arranged at the upper end part of the pipe wall of the vertical pipe (21) opposite to the fourth connecting plate (245) and serves as an outlet of the gas countercurrent channel;
the top plate of the second gas chamber (4) is provided with a hollowed-out hole channel which is communicated with the first through hole (221), the upper part in the second gas chamber (4) is provided with a heating catalytic burner (9), the heating catalytic burner (9) comprises a catalyst layer (91) positioned on the upper side and a heating part (92) positioned on the lower side, the catalyst layer (91) is fully distributed with holes penetrating through the catalyst layer (91), and the gas pipe (5) and the pipe orifice of the second air pipe (7) are positioned below the heating catalytic burner (9).
3. The flameless catalytic combustion cooking bench is characterized by comprising a cooking range top (1), a gas flow distributor (2) connected to the lower surface of the cooking range top (1), a first gas chamber (3) installed at the bottom of the gas flow distributor (2) and communicated with the gas flow distributor (2), a second gas chamber (4) arranged in the first gas chamber (3), a first air pipe (6) communicated with the first gas chamber (3), a gas pipe (5) and a second air pipe (7) which respectively extend into the first gas chamber (3) and are communicated with the second gas chamber (4), wherein a space is formed between the outer wall of the second gas chamber (4) and the inner wall of the first gas chamber (3) for air from the first air pipe (6) to enter the gas flow distributor (2);
the gas flow distributor (2) comprises: the device comprises a vertical pipe (21), a bottom plate (22) fixed at the lower end of the vertical pipe (21), a partition plate (23) and a connecting plate (24) which are arranged in the vertical pipe (21) and vertically connected with the bottom plate (22), wherein a first through hole (221) is formed in the center of the bottom plate (22); the partition plate (23) comprises a first partition plate (231), a second C-shaped partition plate (232) and a third C-shaped partition plate (233), the first partition plate (231) is rectangular, one side edge is connected with the tube wall of the vertical tube (21), and the other side edge is positioned at the edge of the first through hole (221); the second C-shaped partition plate (232) and the third C-shaped partition plate (233) are coaxially arranged by taking the axis of the first through hole (221) as an axis, the third C-shaped partition plate (233) is positioned between the second C-shaped partition plate (232) and the pipe wall of the vertical pipe (21), and the first partition plate (231) extends into the openings of the two C-shaped partition plates; the connecting plate (24) comprises a fifth connecting plate (246) and a sixth connecting plate (247), the fifth connecting plate (246) connects one opening edge of the second C-shaped partition plate (232) and one opening edge of the third C-shaped partition plate (233) which are positioned on the same side of the first partition plate (231) to form a sealed end, and a second through hole (222) for supplying air to the sealed end is arranged on the bottom plate (22) where the sealed end is positioned; a sixth connecting plate (247) connecting one opening edge of the third C-shaped partition plate (233) at the other side of the first partition plate (231) with the first partition plate (231); the pipe wall of the vertical pipe (21), the three partition plates and the two connecting plates form a gas countercurrent channel, and an air outlet pipe (8) is arranged at the upper end part of the pipe wall of the vertical pipe (21) corresponding to the sixth connecting plate (247) and serves as an outlet of the gas countercurrent channel; the top of the first gas chamber (3) is branched and is respectively communicated with the first through hole (221) and the second through hole (222);
the top plate of the second gas chamber (4) is provided with a hollowed-out hole channel which is communicated with the first through hole (221), the upper part in the second gas chamber (4) is provided with a heating catalytic burner (9), the heating catalytic burner (9) comprises a catalyst layer (91) positioned on the upper side and a heating part (92) positioned on the lower side, the catalyst layer (91) is fully distributed with holes penetrating through the catalyst layer (91), and the gas pipe (5) and the pipe orifice of the second air pipe (7) are positioned below the heating catalytic burner (9).
4. Flameless catalytic combustion hob with unidirectional heat transfer and temperature homogeneity according to any one of the claims 1 to 3, characterized in that the upper part of the first gas chamber (3) is a transition, the transition gradually decreasing in diameter towards the upper side, the end of the transition communicating with the first through hole (221), the second gas chamber (4) being offset in the first gas chamber (3), the first air pipe (6) branching off inside the first gas chamber (3), the second air pipe (7) being located inside the first gas chamber (3), one end communicating with the second gas chamber (4) and the other end communicating with one branch of the first air pipe (6).
5. The flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature according to claim 4, wherein a heat insulation layer (10) is disposed under the cooking bench (1) to insulate the gas flow distributor (2) and the first gas chamber (3) from the outside.
6. The flameless catalytic combustion cooking range with unidirectional heat transfer and uniform temperature according to claim 5, wherein the catalyst of the catalyst layer (91) comprises a carrier and an active component, the carrier is a high temperature resistant spherical or honeycomb carrier, and the active component is a noble metal oxide or/and a base metal oxide.
7. The flameless catalytic combustion cooking range with unidirectional heat transfer and uniform temperature according to claim 6, wherein the carrier is alumina balls and the active component is CuO-CeO2。
CN202111517946.1A 2021-12-13 2021-12-13 Flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature Withdrawn CN114251677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111517946.1A CN114251677A (en) 2021-12-13 2021-12-13 Flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111517946.1A CN114251677A (en) 2021-12-13 2021-12-13 Flameless catalytic combustion cooking bench with unidirectional heat transfer and uniform temperature

Publications (1)

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CN114251677A true CN114251677A (en) 2022-03-29

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Country Link
CN (1) CN114251677A (en)

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