CN202002103U

CN202002103U - Pen-container-type micro stepping catalytic reforming burner

Info

Publication number: CN202002103U
Application number: CN2011200750599U
Authority: CN
Inventors: 闫云飞; 张力; 孙志伟; 冉景煜; 蒲舸; 唐强
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2011-03-21
Filing date: 2011-03-21
Publication date: 2011-10-05
Anticipated expiration: 2021-03-21

Abstract

The utility model discloses a pen-container-type micro stepping catalyst reforming burner, which comprises an inner drum, an outer drum, a conical sleeve and an air inlet circular tube; one ends of the outer drum and the inner drum are connected with each other in a sealing way, one end of the inner drum stretches out from the sealing end of the outer drum, and the air inlet circular tube stretches into the other end of the inner drum; the conical sleeve is arranged between the outer drum and the air inlet circular tube in a sealing way; the circumference of the outer drum is uniformly provided with a plurality of air inlet pipes which are communicated with the interior of the outer drum, and a gas inlet pipe which is communicated with the outer drum is arranged between every two adjacent air inlet pipe; and the inner wall of the outer drum and the inner drum wall are coated with catalyst. The inner pipe and the outer pipe are integrated inside one reaction device so as to carry out the stepping catalytic burning, so a coupling reaction can be realized, and the oxidation reaction is enhanced; the air inlet pipes are arranged in a cross way in the tangential direction, so the gas and the air can be uniformly mixed and can flow along the wall of the burner; and the rotational flow of the gas increases the stop time of the gas inside a micro space, so the burning stability can be improved, the reaction is easier to happen, the burning is more adequate, and the burning efficiency can be improved.

Description

The pen container type classification catalytic reforming combustor that declines

Technical field

The utility model relates to a kind of reactor that is applicable to the gas catalysis reforming combustion, relates in particular to a kind of novel pen container type classification catalytic reforming combustor that declines.

Background technology

Along with science and technology development, the application of micromachine more and more is subjected to scientific worker's attention.The more traditional mechanical device of micromachine is compared has unrivaled advantage: volume is little, in light weight, can reduce the volume of device greatly, finishes the work that people can't finish in less space; The energy density height has higher operating efficiency, and micromachine can better be converted into the chemical energy of fuel mechanical energy output; Production cost is lower, and is little to the pollution of environment.Just because of micromachine these advantages are arranged, make it have broad application prospects in fields such as military affairs, national defense construction, Aero-Space, medical treatment.The mode of utilizing of common gaseous fuel has two kinds: a kind of is that gaseous direct fuel is lighted, and obtains energy, and another kind is the fuel gas that gaseous fuel further is converted into other, burns then to obtain energy.For the higher fuel gas of concentration, general directly lighting gets final product, do not need it is converted into other gaseous fuels again, and for the lower fuel gas of some concentration, sometimes need to be translated into and more help the fuel gas lighted, and then burn, can reduce the difficulty of igniting aspect like this, and can guarantee to burn more completely, improve the utilization ratio of fuel.Yet because the combustion space of microburner is minimum, sharply shorten at the residence time of combustion chamber fuel combustion, be prone to combustion instability, ignition difficulties, easy phenomenon such as flame-out also are difficult to guarantee fuel completing combustion.Along with the dwindling of combustion space, the burner face is than increasing in addition, and thermal loss is very serious.Burners in prior generally is a kind of mode of utilizing separately wherein, seldom have two parts are combined to use, and this just limited the utilization of some fuel, has reduced the utilization ratio of fuel.

The utility model content

At prior art above shortcomings part, the utility model provides a kind of assurance fuel gas stable in short space, burning efficiently, the pen container that the combustion process of the oxidizing process of gentle heat release and strong heat release the is coupled type classification catalytic reforming combustor that declines.

The purpose of this utility model is achieved in that the pen container type classification catalytic reforming combustor that declines comprises inner core, is enclosed within inner core outer urceolus, taper sheath and air inlet pipe; Seal between one end of described urceolus and the inner core, the other end of urceolus communicates with the endoporus of inner core; One end of described inner core stretches out from the sealed end of urceolus, and external part is as exhaust outlet, and an end of described air inlet pipe stretches in the other end of inner core; The big cone opening end of described taper sheath and the nozzle of urceolus are tightly connected, and the tiny cone opening end of taper sheath and the cylindrical of air inlet pipe are tightly connected; Be catalytic oxidation reformation zone between described inner core and the urceolus, the endoporus of described inner core is catalytic reaction reformation zone; Be laid with a plurality of and air intake duct catalytic oxidation reformation regional connectivity on the circumference of described urceolus and near sealed end, be provided with gas inlet pipe between the adjacent air intake duct with catalytic oxidation reformation regional connectivity; Coating Pt-Ni is catalyst based on the inwall of described urceolus and the outer wall of inner core, applies Pd/CeO on the inwall of described inner core ₂Catalyst.

Further, described air intake duct and gas inlet pipe are along the tangential direction setting of the circumference of urceolus;

Further, the outer wall of the inwall of described urceolus and inner core and inwall are latticed, ripple or bowl configurations.

Pen container of the present utility model declines type classification catalytic reforming combustor compared with prior art, has following advantage:

1, reform regional for catalytic oxidation between inner core of the present utility model and the urceolus, the endoporus of inner core is catalytic reaction reformation zone, the coupling that has realized that mild exothermic reaction takes place and strong exothermal reaction takes place in catalytic reaction is reformed the zone in catalytic oxidation is reformed the zone has also realized that catalyzing part oxidation is reformed and the coupling of catalytic combustion simultaneously.

2, realize fractional combustion, in catalytic oxidation is reformed the zone, changed methane into H earlier ₂Mist with CO, mist enters in the catalytic reaction reformation zone again and burns, can reduce the activation energy of combustion reaction, make easier, more stable the carrying out of reaction, adopt inner core to combine and prolonged reaction channel with urceolus, improve efficiency of combustion, improved the stability of reaction system.

3, compare with segmented classification catalytic combustion, pen container formula classification catalytic combustion, the second level burning of strong heat release can be the reformation of the first order catalyzing part oxidation heat is provided, outside first order reaction can fully absorb inner burning heat release, heat dissipation problem in the strong heat release combustion process can effectively be solved, and has significantly reduced the heat dissipation capacity when the high-temp combustion wall directly contacts with surrounding environment under the minute yardstick.

4, air inlet pipe is along the tangential direction setting of the circumference of urceolus, combustion gas and air enter in the catalytic oxidation reformation zone along the tangential direction of urceolus, in this catalytic oxidation is reformed the zone, form swirl-flow premixed, and make the adherent motion of fluid, quicken the diffusion of air-flow to the catalysis wall, prolong the fluid motion path, also strengthened the spacing between inlet duct simultaneously, make the connection of pipeline more convenient.

Description of drawings

Fig. 1 is the decline cross-sectional view of type classification catalytic reforming combustor of the utility model pen container;

Fig. 2 is along the cutaway view of A-A direction among Fig. 1.

In the accompanying drawing: 1-urceolus; 2-inner core; 3-catalytic oxidation is reformed regional; 4-catalytic reaction is reformed regional; 5-air inlet pipe; 6-taper sheath; 71-air intake duct; 72-gas inlet pipe; 8-air inlet; The 9-exhaust outlet.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

Fig. 1 is the decline cross-sectional view of type classification catalytic reforming combustor of the utility model pen container, and Fig. 2 is along the cutaway view of A-A direction, as shown in the figure among Fig. 1.The pen container type classification catalytic reforming combustor that declines comprises inner core 2, is enclosed within inner core 2 outer urceolus 1, taper sheath 6 and air inlet pipe 5.Sealing between one end of urceolus 1 and the inner core 2, the other end of urceolus 1 communicates with the endoporus of inner core 2; One end of inner core 2 stretches out from the sealed end of urceolus 1, and external part is as exhaust outlet 9, and an end of air inlet pipe 5 stretches in the other end of inner core 2, and the other end is as air inlet 8; The big cone opening end of taper sheath 6 and the nozzle of urceolus 1 are tightly connected, and the tiny cone opening end of taper sheath 6 and the cylindrical of air inlet pipe 5 are tightly connected.Be catalytic oxidation reformation zone 3 between inner core 2 and the urceolus 1, the endoporus of inner core 2 is that catalytic reaction reforms regional 4.Be laid with a plurality of and catalytic oxidation regional 3 air intake ducts that are communicated with 71 of reforming on the circumference of urceolus 1 and near sealed end, be provided with between the adjacent air intake duct 71 and catalytic oxidation reformation zone 3 gas inlet pipes that are communicated with 72, air intake duct 71 forms cross-distribution (in the present embodiment with gas inlet pipe 72, be laid with two gas inlet pipes on the excircle of urceolus 1, two air intake ducts, gas inlet pipe and air intake duct cross-distribution).Coating Pt-Ni is catalyst based on the outer wall of the inwall of urceolus 1 and inner core 2, applies Pd/CeO on the inwall of inner core 2 ₂Catalyst.Pt, Pd are burning, and to use catalyst, Pt-Ni mainly be combination for catalytic combustion and partial oxidation reforming reaction; Pd/CeO ₂Mainly be to be partial catalytic combustion, Pd is the catalyst of catalytic combustion, CeO ₂Being auxiliary agent, mainly is that catalyst is carried out modification, produces synergy, makes the Pd catalyst have heat endurance and activity preferably.

Air intake duct 71 and gas inlet pipe 72 are along the tangential direction setting of the circumference of urceolus 1, air enters in the catalytic oxidation reformation zone 3 by the tangential direction of air intake duct 71 along urceolus 1, and combustion gas enters in the catalytic oxidation reformation zone 3 by the tangential direction of gas inlet pipe 72 along urceolus 1.Air and combustion gas form swirl-flow premixed in this catalytic oxidation is reformed the zone, and make the adherent motion of fluid, quicken the diffusion of air-flow to the catalysis wall, prolong the fluid motion path.

That the outer wall of the inwall of urceolus 1 and inner core 2 and inwall are is latticed, ripple or bowl configurations, when air and combustion gas enter in the catalytic oxidation reformation zone 3, contact with the catalyst on this structure is faced the wall and meditated, it is long-pending both to have increased catalytic surface, plays a part augmentation of heat transfer again, strengthens premix.

When using this pen container to decline type classification catalytic reforming combustor, with air bubbling air air inlet pipe 71, combustion gas is by gas inlet pipe 72, combustion gas and air the tangential direction eddy flow of urceolus 1 respectively enter in the catalytic oxidation reformation zone 3, methyl hydride catalyzed partial oxidation reaction (being first order reaction) takes place in mixed fuel gas under the catalyst based effect of Pt-Ni, and generates CO and H ₂CO and H ₂Enter catalytic reaction reformation zone 4 after taper sheath 6 places converge, portion of air enters catalytic reaction reformation zone 4 by the air inlet 8 of air inlet pipe 5, and at Pd/CeO ₂Catalytic combustion (being second level reaction) takes place down in catalyst action, and complete reaction discharges net quantity of heat; At last, the gas after the burning is discharged from exhaust outlet 9.

Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. pen container type classification catalytic reforming combustor that declines is characterized in that: comprise inner core (2), be enclosed within inner core (2) outer urceolus (1), taper sheath (6) and air inlet pipe (5); Sealing between one end of described urceolus (1) and the inner core (2), the other end of urceolus (1) communicates with the endoporus of inner core (2); One end of described inner core (2) stretches out from the sealed end of urceolus (1), and external part is as exhaust outlet (9), and an end of described air inlet pipe (5) stretches in the other end of inner core (2); The nozzle of the big cone opening end of described taper sheath (6) and urceolus (1) is tightly connected, and the cylindrical of the tiny cone opening end of taper sheath (6) and air inlet pipe (5) is tightly connected; Reform regional (3) for catalytic oxidation between described inner core (2) and the urceolus (1), the endoporus of described inner core (2) is catalytic reaction reformation zone (4); Be laid with a plurality of air intake ducts (71) that are communicated with catalytic oxidation reformation zone (3) on the circumference of described urceolus (1) and near sealed end, be provided with the gas inlet pipe (72) that is communicated with catalytic oxidation reformation zone (3) between the adjacent air intake duct (71); Coating Pt-Ni is catalyst based on the outer wall of the inwall of described urceolus (1) and inner core (2), applies Pd/CeO on the inwall of described inner core (2) ₂Catalyst.

2. the pen container according to claim 1 type classification catalytic reforming combustor that declines, it is characterized in that: described air intake duct (71) and gas inlet pipe (72) are along the tangential direction setting of the circumference of urceolus (1).

3. the pen container according to claim 1 and 2 type classification catalytic reforming combustor that declines is characterized in that: the outer wall of the inwall of described urceolus (1) and inner core (2) and inwall are latticed, ripple or bowl configurations.