CN214745900U - Two-stage fuel supply semi-premixing ignition device - Google Patents

Abstract

A two-stage fuel supply semi-premixing ignition device comprises a distribution block, a primary windproof sleeve, a primary mixing pipe inner barrel, an ignition electrode bar, a secondary fuel spray pipe, a primary fuel flame stabilizing disc, a primary combustion air joint, a primary fuel joint pipe, a secondary fuel joint pipe and an ignition electrode bar locking joint; the distribution block, the primary windproof sleeve, the primary mixing pipe inner barrel, the ignition electrode bar, the secondary fuel spray pipe, the primary fuel flame stabilization plate, the primary combustion air joint, the primary fuel joint pipe, the secondary fuel joint pipe and the ignition electrode bar locking joint are installed together. This novel inlayer one-level fuel produces the root of flame and can not receive external main burner's ventilation factor interference, can promote the high temperature flue gas backward flow of burning, can form inside and outside two-layer flame, has increased the intensity of flame and the stability of flame, also can guarantee to form great ignition flame shape simultaneously. This is novel can reach big, the flame stabilization effect of ignition flame intensity, guarantee the combustor success rate of igniteing from this.

Description

Two-stage fuel supply semi-premixing ignition device

Technical Field

The utility model relates to a supporting ignition equipment technical field that uses of combustor, especially a doublestage fuel supply half mixes formula ignition in advance.

Background

In a large-scale combustor, according to the requirements of standard specifications, ignition equipment is matched to realize the stable transition from the ignition of the combustor to main fire, so that the ignition safety is ensured. Ignition equipment is a necessary measure for ensuring ignition success rate and ignition safety. The ignition device of present wide application is the mode of diffusion formula monopole ignition mostly, though it has the comparatively simple advantage of structure, but has ignition flame intensity little, and is unstable, in forced draft's combustor, the amount of wind is difficult to control during the ignition, and ignition flame is difficult for factors such as monitoring and leads to the combustor to ignite the success probability less. Based on the above, it is necessary to provide an ignition device capable of realizing stable ignition.

SUMMERY OF THE UTILITY MODEL

In order to overcome the ignition equipment that current combustor used because of the structure limits, there is little, the flame instability of ignition flame intensity, can't guarantee that the combustor has the drawback of higher success rate of igniteing, the utility model provides a simple structure, good reliability, convenient to use under relevant mechanism combined action in the application, can reach the effect that ignition flame intensity is big, flame is stable, has guaranteed that the combustor has the semi-premixing formula ignition of a doublestage fuel supply of higher success rate of igniteing from this.

The utility model provides a technical scheme that its technical problem adopted is:

a two-stage fuel supply semi-premixing ignition device comprises a distribution block, a primary windproof sleeve, a primary mixing pipe inner barrel, an ignition electrode bar, a secondary fuel spray pipe, a primary fuel flame stabilizing disc, a primary combustion air joint, a primary fuel joint pipe, a secondary fuel joint pipe and an ignition electrode bar locking joint; the wind-proof device is characterized in that the middle part of the distribution block is transversely provided with a first-stage mixing pipe inner cylinder interface, and the middle part of the right side of the distribution block is provided with a first-stage wind-proof sleeve interface; the upper end of the distribution block is provided with an opening as a primary combustion air interface, the lower end of the primary combustion air interface is arranged at the upper end of the primary combustion air interface, and the upper end of the primary combustion air interface is connected with a fan pipeline; a channel is arranged between the primary combustion air interface and the primary windproof sleeve interface, the upper end and the lower end of the rear side end of the distribution block are respectively provided with a primary fuel inlet and a secondary fuel inlet, a primary fuel joint pipe and a secondary fuel joint pipe are respectively arranged in the rear side ends of the primary fuel inlet and the secondary fuel inlet, and the other ends of the primary fuel joint pipe and the secondary fuel joint pipe are respectively connected with a gas pipeline; the lower part of the right side end of the distribution block is provided with two secondary fuel spray pipe mounting holes; the left end of the primary windproof sleeve is arranged in a primary windproof sleeve joint, the left end of the inner cylinder of the primary mixing pipe is arranged in the right end of the inner cylinder joint of the primary mixing pipe, the left part of an ignition electrode bar is sleeved in the middle of the inner cylinder joint of the primary mixing pipe, a locking joint of the ignition electrode bar is arranged at the leftmost outer side end of the ignition electrode bar, two secondary fuel spray pipes are arranged, and the left parts of the two secondary fuel spray pipes are respectively arranged in two mounting holes of the secondary fuel spray pipes; the one-level mixing tube inner tube is located the one-level and prevent wind sleeve medial extremity, and the ignition electrode stick is located the one-level mixing tube medial extremity, and there is the trompil at one-level fuel flame stabilization dish middle part, and the right-hand member end of one-level mixing tube inner tube is installed in the trompil, and the right-hand member connection in the sleeve is prevented wind to the outside end of one-level fuel flame stabilization dish and one-level, and the upper end outside of two second grade fuel spray tubes is installed in the one-level and is prevented wind telescopic lower extreme outside, and the second grade fuel flame stabilization bluff body is installed to telescopic right side end is prevented wind to two second grade fuel spray tubes and one-level.

Furthermore, a plurality of vent holes are formed in the primary fuel flame stabilizing disc at intervals.

Furthermore, the primary windproof sleeve interface is communicated with the primary combustion air joint and the primary fuel joint pipe.

Further, the lower secondary fuel nozzle mounting hole at the right side end of the distribution block and the secondary fuel joint pipe are in a communicated state.

The utility model has the advantages that: the utility model discloses in using, because one-level mixed fuel is lighted at the exit end department of one-level fuel steady flame dish, the one-level is placed in the one-level steady flame dish and is prevent wind telescopic inboard, and because the one-level is prevent wind telescopic effect, the root that inlayer one-level fuel produced flame can not be disturbed by external main burner's ventilation factor. The secondary fuel flame stabilizing bluff body plays a secondary protection role on the outer layer of the primary windproof sleeve, simultaneously protects inner and outer flames from being interfered by external factors, promotes the backflow of high-temperature flue gas during combustion, and continuously ensures the combustion of ignition fuel within ignition safety time. The secondary fuel is sprayed out from the secondary fuel spray pipe at the secondary fuel flame stabilizing bluff body, the secondary fuel spray pipe is just right arranged at the outer side of the primary windproof sleeve, namely the outer side of flame formed by the primary fuel, so that after the fuel inside the primary windproof sleeve is ignited, the external fuel is also ignited to form inner and outer layers of flame, the strength of the flame and the stability of the flame are increased, and meanwhile, the larger ignition flame shape can be ensured to be formed. The utility model discloses can reach the effect that ignition flame intensity is big, flame stabilization, guarantee from this that the combustor has higher ignition success rate. Based on the above, so the utility model discloses good application prospect has.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the overall cross-sectional plane structure of the present invention;

FIG. 3 is a schematic diagram of the right-side sectional plane structure of the distribution block of the present invention;

FIG. 4 is a schematic diagram of the right side plan view of the distribution block of the present invention;

fig. 5 is a schematic view of the rear plan structure of the distribution block of the present invention;

FIG. 6 is a schematic diagram of a right-side sectional plane structure of the distribution block of the present invention;

fig. 7 is a schematic perspective view of the distribution block of the present invention;

Detailed Description

As shown in fig. 1, 2, 3, 4, 5, 6, 7, a two-stage fuel supply semi-premix ignition device comprises a distribution block 1, a one-stage windproof sleeve 2, a one-stage mixing tube inner barrel 3, an ignition electrode rod 4, a two-stage fuel spray tube 5, a one-stage fuel flame stabilization plate 6, a one-stage combustion air joint 7, a one-stage fuel joint tube 8, a two-stage fuel joint tube 9 and an ignition electrode rod locking joint 10; the middle part of the distribution block 1 is transversely provided with a cylindrical opening as a first-stage mixing pipe inner cylinder interface 101 (the inner diameters of the two side ends are larger than the inner diameter of the inner side end), and the middle part of the right side of the distribution block 1 is provided with an opening as a first-stage windproof sleeve interface 102; the upper end of the distribution block 1 is provided with an opening as a primary combustion air interface 103, the lower end of a primary combustion air connector 7 is arranged at the upper end of the primary combustion air interface 103, and the upper end of the primary combustion air connector 7 is connected with a fan pipeline through a pipeline; the upper end part distribution block between the primary combustion air interface 103 and the primary windproof sleeve interface 102 is provided with a channel 104, the upper end and the lower end of the rear side of the distribution block 1 are respectively provided with an opening as a primary fuel inlet 105 and a secondary fuel inlet 106, a primary fuel joint pipe 8 and a secondary fuel joint pipe 9 are respectively connected in the rear side end of the primary fuel inlet 105 and the secondary fuel inlet 106, and the other ends of the primary fuel joint pipe 8 and the secondary fuel joint pipe 9 are respectively connected with a gas pipeline in series through a pipeline and an electromagnetic valve; the lower part of the right side end of the distribution block 1 is provided with two secondary fuel spray pipe mounting holes 107 at a certain distance; the left end of the primary windproof sleeve 2 is arranged in a primary windproof barrel connector 102, the left end of a primary mixing tube inner tube 3 is arranged in the right end of a primary mixing tube inner tube connector 101, the left part of an ignition electrode rod 4 is sleeved in the middle of the primary mixing tube inner tube connector 101, the leftmost end of the ignition electrode rod 4 is positioned outside the left end of the distribution block 1, a locking joint 10 of the ignition electrode rod is arranged at the leftmost outer side end of the ignition electrode rod 4, two secondary fuel spray pipes 5 are arranged, and the left parts of the two secondary fuel spray pipes 5 are respectively arranged in two secondary fuel spray pipe mounting holes 107; the utility model discloses a sleeve 2's lower extreme outside is prevent wind to one-level fuel spray tube, the one-level mixing tube inner tube 3 is located the 2 medial extremity of sleeve is prevent wind to the one-level, ignition electrode stick 4 is located the 3 medial extremity of one-level mixing tube inner tube, ignition electrode stick 4's left outer end and external high-pressure ignition transformer's output are connected through the wire, there is a trompil at 6 middle parts of one-level fuel flame stabilization dish, the outside end welding of the right side of one-level mixing tube inner tube 3 is in the trompil, the outside end of one-level fuel flame stabilization dish 6 and the interior right-hand member of sleeve 2 are prevent wind to the one-level are through threaded connection, the welding of the upper end outside of two secondary fuel spray tubes 5 is in the lower extreme outside of sleeve 2 is prevent wind to the one-level, the outside welding of the right side end of two secondary fuel spray tubes 5 and one-level are prevent wind sleeve 2 has a blind flange board as secondary fuel flame stabilization bluff body 11. The primary fuel flame stabilizing disc 6 is provided with a plurality of holes as vent holes 61 at certain intervals. The primary windproof sleeve interface 102 is communicated with the primary combustion air joint 7 and the primary fuel joint pipe 8 through a channel 104. The right side end of the distributor block is in communication between the lower secondary fuel nozzle mounting hole 107 and the interior of the secondary fuel inlet 106.

As shown in fig. 1, 2, 3, 4, 5, 6 and 7, in the application of the present invention, the primary fuel, which is input from the primary combustion air connector 7 and the primary fuel connector pipe 8, is mixed inside the distribution block 1, and then is injected into the space between the primary wind-proof sleeve 2 and the primary mixing pipe inner cylinder 3 through the channel 104 for further premixing; after full premixing, the mixture is sprayed out through the spray holes of the primary fuel flame stabilizing disc 6 and is ignited by electric sparks generated at the front end of the ignition electrode rod 4 (electric arcs are generated between the ignition electrode rod 4 and the primary windproof sleeve 2 within the range of 3-5 mm, and after the electric arcs are contacted with the primary premixed fuel, the fuel is ignited and continuously burns). The secondary fuel enters the distribution block 1 through a secondary fuel joint pipe 9 and then is sprayed out through two secondary fuel spray pipes 5 to be ignited. The utility model discloses in, one-level combustion air connects 7 and external combustor forced draft passageway is connected, can control the air flow that gets into in the premixing chamber (passageway 104) through a governing valve, guarantees that the air that gets into this ignition can fully mix in advance with one-level fuel. The utility model discloses because the one-level mixed fuel is lighted at the exit end department of one-level fuel steady flame dish 6, place the inboard that the sleeve 2 was prevent wind to the one-level in the one-level fuel steady flame dish 6 is, because the wind-proof effect of sleeve 2 is prevented wind to the one-level, the root that the inlayer one-level fuel produced flame can not be disturbed by external main burner's ventilation factor. The secondary fuel flame stabilizing bluff body 11 plays a secondary protection role on the outer layer of the primary windproof sleeve 2; meanwhile, the inner layer flame and the outer layer flame are protected from being interfered by external factors; meanwhile, high-temperature combustion smoke gas backflow can be generated, and ignition fuel combustion is continuously guaranteed within the ignition safety time. In practical conditions, the secondary fuel is sprayed out from the secondary fuel spray pipe 5 at the secondary fuel flame stabilizing bluff body 11, the secondary fuel spray pipe 5 is just arranged at the outer side of the primary windproof sleeve 2, namely the outer side of flame formed by the primary fuel, so that after the fuel inside the primary windproof sleeve 2 is ignited, the external fuel is also ignited to form inner and outer layers of flame, the strength of the flame and the stability of the flame are increased, and meanwhile, the larger shape of the ignition flame can be ensured to be formed. The utility model discloses the flow of second grade fuel can be adjusted according to required ignition flame shape size, and the required combustion air of second grade fuel comes from the compulsory air pipe of combustor, is enough to use, because the utility model discloses be provided with one-level premixed flame, the amount of wind size in the compulsory air pipe of combustor can not influence the stability of ignition flame. The utility model discloses can reach the effect that ignition flame intensity is big, flame stabilization, effectively guarantee from this that the combustor has higher ignition success rate.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. A two-stage fuel supply semi-premixing ignition device comprises a distribution block, a primary windproof sleeve, a primary mixing pipe inner barrel, an ignition electrode bar, a secondary fuel spray pipe, a primary fuel flame stabilizing disc, a primary combustion air joint, a primary fuel joint pipe, a secondary fuel joint pipe and an ignition electrode bar locking joint; the wind-proof device is characterized in that the middle part of the distribution block is transversely provided with a first-stage mixing pipe inner cylinder interface, and the middle part of the right side of the distribution block is provided with a first-stage wind-proof sleeve interface; the upper end of the distribution block is provided with an opening as a primary combustion air interface, the lower end of the primary combustion air interface is arranged at the upper end of the primary combustion air interface, and the upper end of the primary combustion air interface is connected with a fan pipeline; a channel is arranged between the primary combustion air interface and the primary windproof sleeve interface, the upper end and the lower end of the rear side end of the distribution block are respectively provided with a primary fuel inlet and a secondary fuel inlet, a primary fuel joint pipe and a secondary fuel joint pipe are respectively arranged in the rear side ends of the primary fuel inlet and the secondary fuel inlet, and the other ends of the primary fuel joint pipe and the secondary fuel joint pipe are respectively connected with a gas pipeline; the lower part of the right side end of the distribution block is provided with two secondary fuel spray pipe mounting holes; the left end of the primary windproof sleeve is arranged in a primary windproof sleeve joint, the left end of the inner cylinder of the primary mixing pipe is arranged in the right end of the inner cylinder joint of the primary mixing pipe, the left part of an ignition electrode bar is sleeved in the middle of the inner cylinder joint of the primary mixing pipe, a locking joint of the ignition electrode bar is arranged at the leftmost outer side end of the ignition electrode bar, two secondary fuel spray pipes are arranged, and the left parts of the two secondary fuel spray pipes are respectively arranged in two mounting holes of the secondary fuel spray pipes; the one-level mixing tube inner tube is located the one-level and prevent wind sleeve medial extremity, and the ignition electrode stick is located the one-level mixing tube medial extremity, and there is the trompil at one-level fuel flame stabilization dish middle part, and the right-hand member end of one-level mixing tube inner tube is installed in the trompil, and the right-hand member connection in the sleeve is prevented wind to the outside end of one-level fuel flame stabilization dish and one-level, and the upper end outside of two second grade fuel spray tubes is installed in the one-level and is prevented wind telescopic lower extreme outside, and the second grade fuel flame stabilization bluff body is installed to telescopic right side end is prevented wind to two second grade fuel spray tubes and one-level.

2. The dual stage fuel supply semi-premixed ignition device of claim 1, wherein the primary fuel flame stabilizing disc has a plurality of vent holes spaced apart.

3. The dual stage fuel supply semi-premixed ignition device of claim 1, wherein the primary windbreak sleeve port is in communication with the primary combustion air connection and the primary fuel connection.

4. The dual stage fuel supply semi-premixed ignition device of claim 1, wherein the right side end of the distribution block is in communication between the lower secondary fuel nozzle mounting hole and the secondary fuel junction pipe.

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