CN217666389U

CN217666389U - Burner nozzle capable of switching gas channels for roaster

Info

Publication number: CN217666389U
Application number: CN202220058632.3U
Authority: CN
Inventors: 沈标; 赵莹娜; 姚澄; 卞小伟; 李玉华; 李家乐
Original assignee: Jiangyin Xingcheng Special Steel Works Co Ltd
Current assignee: Jiangyin Xingcheng Special Steel Works Co Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-10-28
Anticipated expiration: 2032-01-11

Abstract

The utility model relates to a roaster is with changeable gas passage's nozzle belongs to metallurgical auxiliary assembly technical field. The flame-proof device comprises an air supply pipe, wherein one end of the air supply pipe is used as an oxygen inlet end, the other end of the air supply pipe is provided with an igniter, and the inner cavity of the igniter is used as a flame outlet; the gas supply pipe is provided with a first gas inlet end and a second gas inlet end, the ignition pipe is sleeved with a fire shield, and the fire shield is provided with ignition electrodes which are obliquely arranged in a penetrating manner; the gas supply pipe comprises an outer pipe body, a middle pipe and an inner pipe body which are arranged concentrically; the inner cavity of the inner tube body is used as an oxygen channel, and the oxygen inlet end is communicated with the oxygen channel; a gap is reserved between the inner wall of the middle pipe and the outer wall of the inner pipe body to form a first gas channel, and the first gas channel is communicated with a first gas inlet end; and a gap is reserved between the outer wall of the middle pipe and the inner wall of the outer pipe body. The burner can select the corresponding working mode according to the required combustion effect, improves the combustion efficiency of the burner and realizes energy conservation.

Description

Burner nozzle capable of switching gas channels for roaster

Technical Field

The utility model relates to a roaster is with changeable gas passage's nozzle belongs to metallurgical auxiliary assembly technical field.

Background

The tundish is a refractory container used in short-flow steelmaking, firstly receives molten steel poured from a ladle, and then the molten steel is distributed to all crystallizers by tundish nozzles, a tundish roaster plays a considerable role in the molten steel continuous casting process, the tundish roasting temperature is related to whether the continuous casting molten steel can be poured into the continuous casting crystallizers through the nozzles, and gas is ignited at a burner of the roaster during production and then is used for heating the tundish by the roaster.

In practical use, natural gas is needed in the early stage of baking of the tundish burner, converter gas is used in the later stage of baking, and the mixing ratio of the natural gas to the converter gas is different from that of air when the natural gas and the converter gas are fully combusted. However, the existing burner cannot be freely adjusted, and mixed combustion of multiple kinds of gas with different heat values cannot be realized, so that the combustion efficiency is insufficient, and the energy-saving effect is not obvious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a baking oven is provided with changeable gas passage's nozzle to above-mentioned prior art, has multiple mode, can select corresponding mode according to required combustion effect, improves the combustion efficiency and the combustion effect of nozzle, realizes energy-conservingly.

The utility model provides a technical scheme that above-mentioned problem adopted does: a burner with a switchable gas channel for a roaster comprises a gas supply pipe, wherein one end of the gas supply pipe is used as an oxygen inlet end, the other end of the gas supply pipe is provided with an ignition pipe, and an inner cavity of the ignition pipe is used as a flame outlet; the gas supply pipe is provided with a first gas inlet end and a second gas inlet end, the ignition pipe is sleeved with a fire shield, and the fire shield is provided with ignition electrodes which are obliquely arranged in a penetrating manner, so that the ignition ends of the ignition electrodes are arranged in the ignition pipe;

the gas supply pipe comprises an outer pipe body, a middle pipe and an inner pipe body, the middle pipe is arranged in a penetrating mode in the inner pipe body, the outer pipe body is sleeved on the middle pipe, and the outer pipe body, the middle pipe and the inner pipe body are arranged concentrically; the inner cavity of the inner tube body is used as an oxygen channel, and the oxygen inlet end is communicated with the oxygen channel; a gap is reserved between the inner wall of the middle pipe and the outer wall of the inner pipe body to form a first gas channel, the first gas inlet end is arranged on the middle pipe, and the first gas channel is communicated with the first gas inlet end; a gap is reserved between the outer wall of the middle pipe and the inner wall of the outer pipe body to form a second gas channel, the second gas inlet end is arranged on the outer pipe body, and the second gas inlet end is communicated with the second gas channel; a valve is arranged on the inner pipe body and is close to the oxygen inlet end; the top end of the middle pipe is provided with a flange which is fixedly connected with the bottom surface of the valve; and a sealing cover is arranged at the top end of the outer tube body.

The improved exhaust pipe is characterized in that a funnel-shaped first exhaust pipe is arranged at the bottom end of the inner pipe body, a conical second exhaust pipe is arranged at the bottom of the middle pipe, a plurality of second air outlet holes are circumferentially formed in the second exhaust pipe, a pipe cover is arranged at the bottom end of the second exhaust pipe, a pipe cover hole is formed in the center of the pipe cover, a pipe cover hole is formed in the bottom of the first exhaust pipe in a penetrating mode, and a gap is reserved between the first exhaust pipe and the pipe cover hole.

The first exhaust pipe comprises a conical exhaust pipe and a direct exhaust pipe, and the direct exhaust pipe is arranged at the bottom of the conical exhaust pipe.

The utility model discloses an ignition tube, including outer tubular body, mixed branch pipe, a plurality of third ventholes, it includes the connecting plate, one to mix branch pipe both ends, one the connecting plate is fixed in on the intermediate tube, another the connecting plate is fixed in on the second blast pipe, a plurality of third ventholes are seted up to the hoop respectively on the connecting plate, mix branch pipe circumference and be equipped with and keep off the ring, keep off and leave the space between ring outward flange and the outer tubular body inner wall, mix and divide and form between pipe and the intermediate tube and mix the branch passageway, second gas passage, mix and divide the passageway and link up with the ignition tube inner chamber.

An annular guide plate is arranged in the outer tube body, one end of the guide plate is fixed on the inner wall of the bottom of the outer tube body, and the other end of the guide plate is fixed at the top end of the ignition tube.

Fire-resistant filling member is filled in the fire-blocking cover, a plurality of fixing pieces are fixed in the fire-blocking cover, and the fixing pieces are annularly and uniformly arranged at intervals and embedded in the fire-resistant filling member.

Compared with the prior art, the utility model has the advantages of: the utility model provides a roaster is with nozzle of changeable gas passage, at the during operation, can have multiple mode, can select the mode that corresponds according to required combustion effect, has improved the combustion efficiency and the combustion effect of nozzle, realizes energy-conservation.

Drawings

Fig. 1 is a three-dimensional schematic view of a burner with switchable gas channels for a roaster according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a partial enlarged view of A in FIG. 2;

in the figure, 1 an air supply pipe, 2 an ignition pipe, 3 a mixing and separating pipe, 301 connecting plates, 302 a third air outlet hole, 303 baffle rings, 304 gaps, 4 baffle fire covers, 401 fixing pieces, 5 outer pipes, 501 sealing plates, 502 second air inlet ends, 503 guide rings, 6 middle pipes, 601 flange plates, 602 second air outlet pipes, 603 pipe covers, 604 pipe cover holes, 605 second air outlet holes, 606 first air inlet ends, 7 inner pipes, 701 conical air outlet pipes, 702 straight air outlet pipes, 703 oxygen inlet ends, 704 valves and 8 ignition electrodes.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, 2 and 3, the burner with switchable gas channels for a roaster in the present embodiment includes a gas supply pipe 1, one end of the gas supply pipe 1 is used as an oxygen gas inlet end 703, the other end of the gas supply pipe 1 is connected to a fire tube 2, and an inner cavity of the fire tube 2 is used as a flame outlet. The gas supply pipe 1 comprises an outer pipe body 5, a middle pipe 6 and an inner pipe body 7, wherein the middle pipe 6 is arranged in the inner pipe body 7 in a penetrating mode, the middle pipe 6 is sleeved with the outer pipe body 5, and the outer pipe body, the middle pipe 6 and the inner pipe body are arranged concentrically. The inner cavity of the inner tube body 7 is used as an oxygen channel, and the oxygen inlet end 703 and the oxygen channel are communicated with the inner cavity of the ignition tube 2. A gap is reserved between the inner wall of the middle pipe 6 and the outer wall of the inner pipe body 7 to form a first gas channel, a first gas inlet end 606 is arranged on the middle pipe 6, and the first gas channel and the first gas inlet end 606 are communicated with the inner cavity of the ignition pipe 2. A gap is reserved between the outer wall of the middle pipe 6 and the inner wall of the outer pipe body 5 to form a second gas channel, a second gas inlet end 502 is arranged on the outer pipe body 5, and the second gas inlet end 502 and the second gas channel are communicated with the inner cavity of the ignition pipe 2. A valve 704 is disposed on the inner tube 7, and the valve 704 is close to the oxygen inlet 703. The top of the intermediate pipe 6 is fixed to the bottom of the valve 704 by a flange 601, and the top of the intermediate pipe 6 is sealed. 5 tops of outer body set up shrouding 501, and shrouding 501 is fixed in on the intermediate tube 6, and shrouding 501 seals 5 top surfaces of outer body. The ignition tube 2 is sleeved with the fire blocking cover 4, and the ignition electrode 8 which is obliquely arranged is arranged on the fire blocking cover 4 in a penetrating mode, so that the ignition end of the ignition electrode 8 is arranged in the ignition tube 2.

The bottom end of the inner pipe body 7 is provided with a first exhaust pipe, the first exhaust pipe comprises a conical exhaust pipe 701 and a straight exhaust pipe 702, and the straight exhaust pipe 702 is arranged at the bottom of the conical exhaust pipe 701, so that the first exhaust pipe is funnel-shaped. The bottom of the middle pipe 6 is provided with a conical second exhaust pipe 602, the diameter of the top of the second exhaust pipe 602 is large, the diameter of the bottom of the second exhaust pipe 602 is small, a plurality of second air outlets 605 are formed in the circumferential direction of the second exhaust pipe 602, a pipe cover 603 is arranged at the bottom end of the second exhaust pipe 602, a pipe cover hole 604 is formed in the center of the pipe cover 603, the straight exhaust pipe 702 penetrates through the pipe cover hole 604, a gap is reserved between the straight exhaust pipe 702 and the pipe cover hole 604, and the first gas channel is communicated with the inner cavity of the ignition pipe 2.

The inner cavity of the outer tube body 5 is provided with a mixing and separating tube 3, the mixing and separating tube 3 is sleeved on the middle tube 6, two ends of the mixing and separating tube 3 are respectively provided with a connecting plate 301, one connecting plate 301 is fixed on the middle tube 6, the other connecting plate 301 is fixed on the second exhaust tube 602, the connecting plate 301 is respectively provided with a plurality of third air outlets 302 in the circumferential direction, the mixing and separating tube 3 is circumferentially provided with a retaining ring 303, a gap is reserved between the outer edge of the retaining ring 303 and the inner wall of the outer tube body 5, the mixing and separating tube 3 and the outer tube body 5, and the mixing and separating tube 3 and the middle tube 6 form a mixing and separating channel, and the second gas channel, the mixing and separating channel are communicated with the inner cavity of the ignition tube 2.

An annular guide plate is arranged in the outer tube body, one end of the guide plate is fixed on the inner wall of the bottom of the outer tube body, the other end of the guide plate is fixed at the top end of the ignition tube, the ignition tube is in a funnel-shaped structural member, and the guide plate guides gas in the mixed channel to the inner cavity of the ignition tube.

Above-mentioned fire blocking cover 4 intussuseption is filled fire-resistant filling member, and fire blocking cover 4 internal fixation has a plurality of mounting 401, and a plurality of mounting 401 hoop is even interval arrangement, and a plurality of mounting 401 imbeds in fire-resistant filling member. The refractory filling piece is made of self-flowing refractory castable or slag or refractory cotton. The fire-blocking cover 4 has the functions of fire resistance and burning prevention, the gas supply pipe is prevented from being damaged by long-time burning of flame, and the fixing piece can improve the fixing capacity and the anti-cracking capacity between the fire-resistant filling piece and the fire-blocking cover.

Oxygen is introduced into the inner cavity of the inner tube body through the oxygen inlet end and then flows into the inner cavity of the ignition tube; the coking coal gas flows into the inner cavity of the fire tube through the first gas channel and the first exhaust pipe and then flows into the fire tube through the first gas outlet and the tube cover hole; and air or converter gas flows into the inner cavity of the ignition tube through the mixing and distributing channel after passing through the second gas channel. The gas outlet ends of oxygen, coke oven gas, air or converter gas are respectively provided with a plurality of relatively narrow and uniform gas outlet holes, so that gas flow can be dispersed, certain slow flow and shunt effects are achieved, and meanwhile, the phenomenon that the burner is damaged due to long flame length is avoided, and further the combustion performance is insufficient.

This application can have multiple mode at the during operation, can select the mode that corresponds according to required combustion effect, has improved the combustion efficiency and the combustion effect of nozzle, realizes energy-conservation.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a roaster is with nozzle of changeable gas passage which characterized in that: the flame-proof device comprises an air supply pipe, wherein one end of the air supply pipe is used as an oxygen inlet end, the other end of the air supply pipe is provided with an igniter, and the inner cavity of the igniter is used as a flame outlet; the gas supply pipe is provided with a first gas inlet end and a second gas inlet end, the ignition pipe is sleeved with a fire shield, and the fire shield is provided with ignition electrodes which are obliquely arranged in a penetrating manner, so that the ignition ends of the ignition electrodes are arranged in the ignition pipe;

the gas supply pipe comprises an outer pipe body, a middle pipe and an inner pipe body, the middle pipe is penetrated through the inner pipe body, the outer pipe body is sleeved on the middle pipe, and the outer pipe body, the middle pipe and the inner pipe body are concentrically arranged; the inner cavity of the inner tube body is used as an oxygen channel, and the oxygen inlet end is communicated with the oxygen channel; a gap is reserved between the inner wall of the middle pipe and the outer wall of the inner pipe body to form a first gas channel, the first gas inlet end is arranged on the middle pipe, and the first gas channel is communicated with the first gas inlet end; a gap is reserved between the outer wall of the middle pipe and the inner wall of the outer pipe body to form a second gas channel, the second gas inlet end is arranged on the outer pipe body, and the second gas inlet end is communicated with the second gas channel; a valve is arranged on the inner pipe body and is close to the oxygen inlet end; the top end of the middle pipe is provided with a flange plate which is fixedly connected with the bottom surface of the valve; and a sealing cover is arranged at the top end of the outer tube body.

2. The burner with switchable gas channels for the roaster of claim 1, wherein: the improved exhaust pipe is characterized in that a funnel-shaped first exhaust pipe is arranged at the bottom end of the inner pipe body, a conical second exhaust pipe is arranged at the bottom of the middle pipe, a plurality of second air outlet holes are circumferentially formed in the second exhaust pipe, a pipe cover is arranged at the bottom end of the second exhaust pipe, a pipe cover hole is formed in the center of the pipe cover, a pipe cover hole is formed in the bottom of the first exhaust pipe in a penetrating mode, and a gap is reserved between the first exhaust pipe and the pipe cover hole.

3. The burner with switchable gas channels for the roaster of claim 2, wherein: the first exhaust pipe comprises a conical exhaust pipe and a straight exhaust pipe, and the straight exhaust pipe is arranged at the bottom of the conical exhaust pipe.

4. The burner with switchable gas channels for the roaster of claim 1, wherein: the utility model discloses an ignition tube, including outer tubular body, mixed branch pipe, a plurality of third ventholes, it includes the connecting plate, one to mix branch pipe both ends, one the connecting plate is fixed in on the intermediate tube, another the connecting plate is fixed in on the second blast pipe, a plurality of third ventholes are seted up to the hoop respectively on the connecting plate, mix branch pipe circumference and be equipped with and keep off the ring, keep off and leave the space between ring outward flange and the outer tubular body inner wall, mix and divide and form between pipe and the intermediate tube and mix the branch passageway, second gas passage, mix and divide the passageway and link up with the ignition tube inner chamber.

5. The burner with switchable gas channels for the roaster of claim 4, wherein: an annular guide plate is arranged in the outer tube body, one end of the guide plate is fixed on the inner wall of the bottom of the outer tube body, and the other end of the guide plate is fixed at the top end of the ignition tube.

6. The burner with switchable gas channels for the roaster of claim 1, wherein: fire-resistant filling member is filled in the fire-blocking cover, a plurality of fixing pieces are fixed in the fire-blocking cover, and the fixing pieces are annularly and uniformly arranged at intervals and embedded in the fire-resistant filling member.