CN212178869U - Stable combustion type fan-free burner - Google Patents

Abstract

The utility model provides a stabilize combustion type no fan nozzle, involves the combustion apparatus field, includes the gas pipe that supplies with the gas to the flame nozzle, and gas pipe and an axial air inlet pipe threaded connection, axial air-supply line include the outer tube and set up in the outer tube and rather than coaxial inner tube, and the lower extreme of axial air-supply line inserts in the radial air inlet room, and the air inlet barrel lower extreme of radial air inlet room inserts in the wind adjusting barrel body of the radial wind adjusting pipe of being connected with the flame nozzle. The utility model discloses a gas pipe depth of insertion adjustable structure, the change of depth of insertion arouses the change of axial air intake position vacuum, and then takes the change of axial suction pressure, adjusts axial air suction pressure through adjusting gas pipe depth of insertion to realized not joining in marriage the burning that the fan also can be completely stable when fuel pressure and kind change.

Description

Stable combustion type fan-free burner

Technical Field

The utility model relates to the nozzle in combustion apparatus field, specific stable combustion type does not have fan nozzle that says so.

Background

At present, thermal equipment and a kiln furnace are widely applied to the industries of steel, nonferrous metal, chemical industry, building materials, electric power and the like, and a burner is taken as special equipment for gas combustion and is a key part of the gas thermal equipment and the kiln furnace. The fuel needs to be matched with a proper amount of air to be fully combusted. According to the mode of air distribution, the burners can be divided into fan blast burners and fan-free burners. Compared with a fan blowing burner, the fan-free burner has no fan and air pipeline, and has high economical efficiency and arrangement convenience. The existing fan-free burner has high requirement on the pressure of gas, negative pressure is formed at an air suction inlet through the injection of the gas with high pressure, and air is sucked into the burner and is mixed with the gas for combustion. If the gas pressure is unstable, the air suction capacity can be changed; if the calorific value of the gas is unstable or the weight of the gas is changed, the amount of air required for complete combustion of the gas is changed. When these two conditions occur, the mixture ratio of gas and air can be unbalanced, resulting in unstable flame and incomplete combustion, resulting in potential safety hazard and fuel waste.

SUMMERY OF THE UTILITY MODEL

In order to solve the unstable and incomplete problem of burning of flame that current no fan nozzle exists, the utility model provides a stabilize combustion type no fan nozzle, this nozzle adopts gas pipe depth of insertion adjustable structure, and the change of depth of insertion arouses the change of axial air intake position vacuum, and then takes the change of axial pressure of induced draught, adjusts axial air suction pressure through adjusting gas pipe depth of insertion to realized not joining in marriage the burning that the fan also can be completely stable when fuel pressure and kind change.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a stable combustion type fan-free burner comprises a gas pipe for supplying gas to a flame nozzle, wherein the gas pipe is in threaded connection with an axial air inlet pipe, the axial air inlet pipe comprises an outer pipe and an inner pipe which is arranged in the outer pipe and is coaxial with the outer pipe, a necking-shaped flame nozzle of the gas pipe is inserted into the inner pipe and forms an axial air inlet area which surrounds the gas pipe and is communicated with the outside with the side wall of the inner pipe, an axial air adjusting plate for sealing the axial air inlet area is arranged on the axial air inlet area, and an air inlet is formed in the axial air adjusting plate;

the radial air inlet chamber comprises an air inlet cylinder body, the air inlet cylinder body is inserted into an air adjusting cylinder body of a radial air adjusting pipe connected with a flame nozzle, a plurality of air inlet holes are formed in the side walls of the air adjusting cylinder body and the air inlet cylinder body, and the air inlet holes on the air adjusting cylinder body and the air inlet cylinder body are controlled to coincide in number and size by rotating the air adjusting cylinder body, so that the air inlet amount is adjusted.

The utility model discloses a preferred embodiment does, be provided with on the axial air-supply line and intake the district confined upper cover plate with the axial, set up a plurality of air inlets that feed through with the axial on the upper cover plate, the axial air adjusting plate pass through the cooperation of bolt and bolt hole and connect and set up on the upper cover plate, and the bolt hole is the arc slot hole to make the axial air adjusting plate have for the upper cover plate and adjust the rotation allowance, and then adjust the axial air adjusting plate on the air inlet and the upper cover plate on the air inlet correspond quantity and size, finally adjust the intake.

The utility model discloses a another kind of preferred embodiment does, the outer tube is hollow pipe, and the inner tube forms for the concatenation of round platform form throat district and pipe district, and the laminating of the big diameter end in upper portion of round platform form throat district and the inner wall of outer tube, and the lower extreme in the pipe district surpasss the bottom of outer tube and prolongs to in the flame nozzle to make and form radial air intake between inner tube outer wall and the accent wind barrel inner wall and distinguish.

The utility model discloses a another kind of preferred embodiment does, be provided with flange I on the outer tube, simultaneously, be provided with the upper flange on the air inlet barrel, and this upper flange passes through adjusting screw and is connected with flange I, adjusts the indoor degree of depth of axial air-supply line insertion radial air inlet through adjusting this adjusting screw, and then adjusts the size of the indoor negative pressure of radial air inlet.

The utility model discloses a another preferred embodiment does, have the sealing washer of sealed axial air-supply line and radial air inlet room clearance between the inner wall of going up the flange and the outer wall of axial air-supply line, and this sealing washer outside is provided with the gland that compresses tightly it.

Another preferred embodiment of the utility model is that the lower end of the air adjusting cylinder is arranged on the flame nozzle through a connecting flange II, the lower end of the air inlet cylinder is provided with a lower flange, and the lower flange is arranged between the connecting flange II and the flame nozzle and is connected with the flame nozzle through a connecting bolt and a flange hole in a matching way; and the flange holes of the connecting flange II are arc-shaped long holes, so that the air adjusting cylinder body has adjusting rotation allowance relative to the air inlet cylinder body, the overlapping number and size of the air inlet holes in the air adjusting cylinder body and the air inlet holes in the air inlet cylinder body are controlled, and the air inlet amount is adjusted.

Another preferred embodiment of the present invention is that the flame nozzle is provided with an igniter mounting opening, a fire observation opening and a flame detection mounting opening.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the burner of the utility model adopts a structure with adjustable gas pipe insertion depth, the change of the insertion depth causes the change of the vacuum degree at the axial air inlet position, thereby further bringing the change of the axial air suction pressure, and the axial air suction pressure is adjusted by adjusting the gas pipe insertion depth;

2) the utility model discloses a nozzle sets up the axial air adjusting plate, and the fresh air inlet of axial air adjusting plate corresponds with the fresh air inlet of axial air-supply line, adjusts the degree of coincidence of two-layer fresh air inlet through the fixed position of adjusting air adjusting plate arc slot hole, and the higher the degree of coincidence is, the bigger the air intake is, the bigger the air inlet ability is;

3) the burner of the utility model adopts a structure that the insertion depth of the axial air inlet pipe can be adjusted, the insertion depth is adjusted by rotating the adjusting screw rod, and the change of the insertion depth causes the change of the vacuum degree of the radial air inlet position, thereby bringing the change of the radial air suction pressure;

4) the utility model discloses a nozzle sets up radial accent tuber pipe, and the fresh air inlet of radially transferring the tuber pipe is corresponding with the fresh air inlet of radial air inlet room, adjusts the degree of coincidence of two-layer fresh air inlet through the fixed position of adjusting accent arc slot hole, and the higher the degree of coincidence is, the bigger the air intake is, the bigger the air inlet ability is;

5) the burner of the utility model adopts gas injection as power, sucks air twice in the axial direction and the radial direction, and the suction capacity of the air for twice can be conveniently adjusted, thereby saving an air blower and an air pipeline, saving electric energy consumption and reducing equipment cost;

6) the utility model has strong adaptability to gas, and can adapt to different gas by adjusting the air suction capacity; the flame size and length can be adjusted by adjusting the insertion depth, axial air inlet and radial air inlet of the gas pipe, and the adjusting range is large;

7) the burner of the utility model adopts the axial and radial secondary air intake design, the gas and the air are fully mixed, the Nox emission can be effectively reduced, and the burner is energy-saving and environment-friendly; the burner is provided with the flame viewing port, can be used for conveniently installing the igniter and detecting flame, can realize automatic ignition and flameout protection, and is safe and reliable.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a detailed view of the connection of the gas line to the flame nozzle of FIG. 1;

FIG. 3 is a schematic diagram of an axial damper structure;

reference numerals: 1. the gas pipe, 101, gas spout, 2, axial air adjusting plate, 3, axial air inlet pipe, 301, upper cover plate, 302, outer pipe, 303, flange I, 304, inner pipe, 305, axial air inlet zone, 4, adjusting screw, 5, radial air inlet chamber, 501, upper flange, 502, air inlet cylinder, 503, lower flange, 6, gland, 7, sealing ring, 8, radial air adjusting pipe, 801, air adjusting cylinder, 802, flange II, 803, radial air inlet zone, 9, flame nozzle, 10, igniter installing port, 11, flame observing port, 12, flame detection installing port.

Detailed Description

The technical solution of the present invention will be further elaborated with reference to the following specific embodiments.

Example 1

As shown in fig. 1-3, a stable combustion type fan-less burner comprises a gas pipe 1 for supplying gas to a flame nozzle 9, the gas pipe 1 is in threaded connection with an axial air inlet pipe 3, the axial air inlet pipe 3 comprises an outer pipe 302 and an inner pipe 304 which is arranged in the outer pipe 302 and is coaxial with the outer pipe, a necking-shaped flame nozzle 101 of the gas pipe 1 is inserted into the inner pipe 304 and forms an axial air inlet area 305 which surrounds the gas pipe 1 and is communicated with the outside with the side wall of the inner pipe 304, an axial air adjusting plate 2 for sealing the axial air inlet area 305 is arranged on the axial air inlet area 305, and an air inlet is arranged on the axial air adjusting plate 2;

the end of the outer pipe 302 of the axial air inlet pipe 3 far away from the gas pipe 1 is inserted into a radial air inlet chamber 5, the radial air inlet chamber 5 comprises an air inlet cylinder 502, the air inlet cylinder 502 is inserted into an air adjusting cylinder 801 of a radial air adjusting pipe 8 connected with a flame nozzle 9, a plurality of air inlet holes are formed in the side walls of the air adjusting cylinder 801 and the air inlet cylinder 502, and the air inlet amount is adjusted by rotating the air adjusting cylinder 801 so as to control the overlapping number and size of the air inlet holes on the air inlet holes and the air inlet holes on the air inlet cylinder 502.

In the throat-shaped flame ports 101 of the present embodiment, the so-called throat shape is also a circular truncated cone shape in practice, and the angle between the side wall thereof and the vertical direction is preferably 7.5 to 22.5 °; the interior of the flame nozzle 9 is divided into an upper convergent mixing section and a lower combustion ejection section, the so-called convergent mixing section is also in fact in the shape of a circular truncated cone, the diameter of the convergent mixing section is gradually reduced from top to bottom, and the included angle of the side wall and the vertical direction is preferably 7.5-22.5 degrees.

The basic embodiments of the present invention are described above, and further improvements, optimizations and limitations can be made on the above basis, so as to obtain the following embodiments:

example 2

This embodiment is an improved scheme based on embodiment 1, and its basic structure is the same as embodiment 1, and the improvement point is: as shown in fig. 2 and 3, an upper cover plate 301 for sealing the axial air intake region 305 is disposed on the axial air inlet pipe 3, a plurality of air inlets communicated with the axial air intake region 305 are disposed on the upper cover plate 301, the axial air adjusting plate 2 is disposed on the upper cover plate 301 through the matching connection of bolts and bolt holes, and the bolt holes are arc-shaped long holes, so that the axial air adjusting plate 2 has an adjustment rotation allowance relative to the upper cover plate 301, and the corresponding number and size of the air inlets on the axial air adjusting plate 2 and the upper cover plate 301 are adjusted, and finally the air intake amount is adjusted.

Example 3

The present embodiment is another modified scheme based on embodiment 1, and the basic structure is the same as embodiment 1, and the improvement point is that: as shown in fig. 2, the outer tube 302 is a hollow circular tube, the inner tube 304 is formed by splicing a circular truncated cone-shaped reduced area and a circular tube area, the large-diameter end of the upper portion of the circular truncated cone-shaped reduced area is attached to the inner wall of the outer tube 302, the lower end of the circular tube area exceeds the bottom end of the outer tube 302 and extends into the flame nozzle 9, and a radial air inlet area 803 is formed between the outer wall of the inner tube 304 and the inner wall of the air adjusting cylinder 801.

In this embodiment, the included angle between the side wall of the circular truncated cone shaped necking area of the inner tube 304 and the vertical direction is preferably 7.5-22.5 °.

Example 4

The present embodiment is another modified scheme based on embodiment 1, and the basic structure is the same as embodiment 1, and the improvement point is that: as shown in fig. 2, a connecting flange i 303 is arranged on the outer pipe 302, an upper flange 501 is arranged on the air inlet cylinder 502, the upper flange 501 is connected with the connecting flange i 303 through an adjusting screw 4, the depth of the axial air inlet pipe 3 inserted into the radial air inlet chamber 5 is adjusted by adjusting the adjusting screw 4, and the size of the negative pressure in the radial air inlet chamber 5 is further adjusted.

Example 5

This embodiment is an improved scheme based on embodiment 4, and its basic structure is the same as embodiment 4, and the improvement point is: as shown in fig. 2, a sealing ring 7 for sealing a gap between the axial air inlet pipe 3 and the radial air inlet chamber 5 is arranged between the inner wall of the upper flange 501 and the outer wall of the axial air inlet pipe 3, and a gland 6 for compressing the sealing ring 7 is arranged outside the sealing ring 7.

Example 6

The present embodiment is another modified scheme based on embodiment 1, and the basic structure is the same as embodiment 1, and the improvement point is that: as shown in fig. 2, the lower end of the air adjusting cylinder 801 is arranged on the flame nozzle 9 through a connecting flange ii 802, the lower end of the air inlet cylinder 502 is provided with a lower flange 503, and the lower flange 503 is located between the connecting flange ii 802 and the flame nozzle 9, and the three are connected in a matched manner through a connecting bolt and a flange hole; the flange holes of the connecting flange II 802 are arc-shaped long holes, so that the air adjusting cylinder 801 has adjusting rotation allowance relative to the air inlet cylinder 502, the overlapping number and size of the air inlet holes in the air adjusting cylinder 801 and the air inlet holes in the air inlet cylinder 502 are controlled, and the air inlet amount is adjusted.

Example 7

The present embodiment is another modified scheme based on embodiment 1, and the basic structure is the same as embodiment 1, and the improvement point is that: as shown in fig. 1, the flame nozzle 9 is provided with an igniter mounting port 10, a fire observation port 11, and a flame detection mounting port 12.

The utility model discloses in, when gas pipe 1 spouts into the gas, form the negative pressure in axial air-supply line 3's air intake position, in the air passed through the air intake entering nozzle, the size of air intake position negative pressure was adjusted to the depth of insertion of accessible adjustment gas pipe 1, and the overlap ratio of two-layer fresh air inlet is adjusted to the fixed position of the 2 arc slot holes of accessible adjustment axial air adjusting plate still, can adjust the size of air inlet bore, and the intake also can change thereupon. The air and the gas sucked into the axial air inlet pipe 3 are mixed and burned in the inner pipe 304 of the axial air inlet pipe 3, and the gas in the inner pipe 304 is rapidly expanded and is ejected through the necking of the end part of the inner pipe. The sprayed gas enters the contraction mixing section of the flame nozzle 9, negative pressure is formed in the radial air inlet chamber 5, and air is sucked into the burner from the air inlet of the air inlet cylinder 502. The negative pressure in the radial air inlet chamber 5 can be adjusted by adjusting the insertion depth of the axial air inlet pipe 3 in the radial air inlet chamber 5, and the contact ratio of the two layers of air inlet holes can be adjusted by adjusting the fixed position of the long hole on the air cylinder 502, so that the size of the air inlet aperture can be adjusted, and the air inlet amount can be changed accordingly. The air and the fuel gas sucked in by the radial air inlet chamber 5 are mixed in the contraction mixing section of the flame nozzle 9, and the air and the fuel gas are fully mixed after the air is axially and radially fed twice, so that more stable flame is obtained, the combustion temperature is higher, and the heating speed is higher. Set up some firearm installing port 10, viewing fire mouth 11 and flame detection installing port 12 on the flame nozzle 9, observation flame situation that can be convenient, installation firearm and flame detection device that can also be convenient can realize autoignition and flame-out protection, and the security of nozzle is fully ensured.

In order to prolong the service life of the burner, the inner pipe 304 of the axial air inlet pipe 3 is made of heat-resistant steel, but the invention is not limited to heat-resistant steel, and other materials capable of achieving the using effect are also possible. The flame nozzle 9 is made of corundum burner block, but is not limited to corundum burner block, and other materials which can achieve the using effect can be used for making the burner block and stainless steel.

The above embodiments are merely illustrative of the principles and functions of the present invention, and any modification or change made on the principles and functions of the above embodiments without departing from the spirit and technical idea of the present invention is still covered by the claims of the present invention.

Claims (7)

1. A stable combustion type fan-less burner comprising a gas pipe (1) for supplying gas to a flame nozzle (9), characterized in that: the gas pipe (1) is in threaded connection with an axial air inlet pipe (3), the axial air inlet pipe (3) comprises an outer pipe (302) and an inner pipe (304) which is arranged in the outer pipe (302) and coaxial with the outer pipe, a necking flame nozzle (101) of the gas pipe (1) is inserted into the inner pipe (304) and forms an axial air inlet area (305) which surrounds the gas pipe (1) and is communicated with the outside with the side wall of the inner pipe (304), an axial air adjusting plate (2) which seals the axial air inlet area (305) is arranged on the axial air inlet area (305), and an air inlet is formed in the axial air adjusting plate (2);

one end of an outer pipe (302) of the axial air inlet pipe (3), which is far away from the gas pipe (1), is inserted into a radial air inlet chamber (5), the radial air inlet chamber (5) comprises an air inlet cylinder body (502), the air inlet cylinder body (502) is inserted into an air adjusting cylinder body (801) of a radial air adjusting pipe (8) connected with a flame nozzle (9), a plurality of air inlet holes are formed in the side walls of the air adjusting cylinder body (801) and the air inlet cylinder body (502), and the air inlet holes on the air inlet cylinder body (502) are controlled to coincide with the air inlet holes on the air adjusting cylinder body (801) in number and size by rotating the air adjusting cylinder body (801), so that the air inlet amount is adjusted.

2. The stable combustion type fan-less burner of claim 1, characterized in that: be provided with on axial air-supply line (3) and advance air zone (305) confined upper cover plate (301) with the axial, set up a plurality of air inlets that advance air zone (305) intercommunication with the axial on upper cover plate (301), axial air adjusting plate (2) connect through the cooperation of bolt and bolt hole and set up on upper cover plate (301), and the bolt hole is the arc slot hole to make axial air adjusting plate (2) have for upper cover plate (301) and adjust and rotate the surplus, and then adjust the corresponding quantity and the size of air inlet on air inlet and upper cover plate (301) on axial air adjusting plate (2), finally adjust the intake.

3. The stable combustion type fan-less burner of claim 1, characterized in that: the outer tube (302) is a hollow round tube, the inner tube (304) is formed by splicing a circular truncated cone-shaped reducing area and a round tube area, the large-diameter end of the upper portion of the circular truncated cone-shaped reducing area is attached to the inner wall of the outer tube (302), the lower end of the round tube area exceeds the bottom end of the outer tube (302) and extends into the flame nozzle (9), and a radial air inlet area (803) is formed between the outer wall of the inner tube (304) and the inner wall of the air adjusting cylinder (801).

4. The stable combustion type fan-less burner of claim 1, characterized in that: the air inlet structure is characterized in that a connecting flange I (303) is arranged on the outer pipe (302), an upper flange (501) is arranged on the air inlet cylinder body (502), the upper flange (501) is connected with the connecting flange I (303) through an adjusting screw rod (4), the depth of the axial air inlet pipe (3) inserted into the radial air inlet chamber (5) is adjusted by adjusting the adjusting screw rod (4), and then the size of negative pressure in the radial air inlet chamber (5) is adjusted.

5. The stable combustion type fan-less burner of claim 4, wherein: and a sealing ring (7) for sealing the gap between the axial air inlet pipe (3) and the radial air inlet chamber (5) is arranged between the inner wall of the upper flange (501) and the outer wall of the axial air inlet pipe (3), and a gland (6) for compressing the sealing ring (7) is arranged outside the sealing ring (7).

6. The stable combustion type fan-less burner of claim 1, characterized in that: the lower end of the air adjusting cylinder body (801) is arranged on the flame nozzle (9) through a connecting flange II (802), the lower end of the air inlet cylinder body (502) is provided with a lower flange (503), the lower flange (503) is positioned between the connecting flange II (802) and the flame nozzle (9), and the air adjusting cylinder body, the air adjusting cylinder body and the flame nozzle are connected in a matched mode through a connecting bolt and a flange hole; the flange holes of the connecting flange II (802) are arc-shaped long holes, so that the air adjusting cylinder body (801) has adjusting rotation allowance relative to the air inlet cylinder body (502), the overlapping number and size of the air inlet holes in the air adjusting cylinder body (801) and the air inlet holes in the air inlet cylinder body (502) are controlled, and the air inlet amount is adjusted.

7. The stable combustion type fan-less burner of claim 1, characterized in that: an igniter mounting port (10), a fire observation port (11) and a flame detection mounting port (12) are arranged on the flame nozzle (9).

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