CN212565761U

CN212565761U - Central premix burner

Info

Publication number: CN212565761U
Application number: CN202021206010.8U
Authority: CN
Inventors: 甄从军
Original assignee: Foshan Enou Combustion Control Technology Co ltd
Current assignee: Foshan Enou Combustion Control Technology Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-02-19
Anticipated expiration: 2030-06-24

Abstract

The utility model provides a central premix combustor, including sleeve, casing, body, central tuber pipe and ignition electrode, the casing is equipped with front side open-ended inner chamber, the sleeve cover is established on the opening, be equipped with the first air intake of intercommunication external world and inner chamber on the casing, body and ignition electrode set up in the inner chamber, be equipped with the air inlet that extends to the casing outside on the body, the body front side is equipped with the gas outlet, be equipped with the burner head between gas outlet and the opening, the ignition electrode is worn out the burner head, the burner head corresponds the body and is equipped with first gas hole, be equipped with first exhaust vent between first gas hole and the burner head outer edge; the central air pipe is arranged in the pipe body, a second air inlet extending to the outer side of the shell is formed in the central air pipe, and an exchange air hole is formed in the central air pipe. The utility model discloses a center premix burner is through addding central tuber pipe inside the body to make the gas of central tuber pipe and the gas of body exchange, thereby make the gas of body mix once having carried out before the blowout burner tip.

Description

Central premix burner

Technical Field

The utility model relates to an industrial kiln field especially indicates a center premix burner.

Background

A burner of a kiln furnace is a device for supplying heat for an industrial kiln furnace, for example, Chinese patent No. CN201916905U discloses a twice gas mixing type ceramic kiln gas oxygen-enriched energy-saving burner, which comprises a silicon carbide sleeve, the silicon carbide sleeve is connected with a shell, the side wall of the shell is connected with a combustion-supporting gas inlet pipe, a gas mixing sheet is arranged between the combustion-supporting gas inlet pipe and the shell, the head end of the shell is connected with a spray gun body, the spray gun body is connected with a gun barrel, the tail end of the gun barrel is connected with a gas nozzle and is provided with a cyclone sheet, the side part of the gas nozzle is provided with a nozzle through hole, the gun barrel is provided with a gun barrel vent hole, a small part of gas sprayed out from the gun barrel vent hole is mixed with combustion-supporting gas in the shell, most of the rest gas is sprayed out from the nozzle through hole and is secondarily mixed with the gas sprayed out, the gas of the burner is not uniformly mixed and is directly sucked into the kiln after being completely combusted, so that the flame temperature is low, the combustion effect is poor, and the energy consumption is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a center premix combustor, through set up central tuber pipe inside the body to make the gas of central tuber pipe and the gas of body exchange, thereby make the gas of body carry out once mixing before the blowout nozzle head.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the central premix burner comprises a sleeve, a shell, a pipe body, a central air pipe and an ignition electrode, wherein the shell is provided with an inner cavity with an open front end, the sleeve is sleeved on the opening, the shell is provided with a first air inlet communicated with the outside and the inner cavity, the pipe body and the ignition electrode are arranged in the inner cavity, the pipe body is provided with an air inlet extending to the outer side of the shell, the front side of the pipe body is provided with an air outlet, a burner head is arranged between the air outlet and the opening, the ignition electrode penetrates out of the burner head, the burner head is provided with a first gas hole corresponding to the pipe body, and a first air outlet hole is arranged between the first gas hole and the outer edge of the burner head; the central air pipe is arranged in the pipe body, a second air inlet extending to the outer side of the shell is formed in the central air pipe, and an exchange air hole is formed in the central air pipe.

Compared with the prior art, the central premix burner of the utility model adds the central air pipe inside the pipe body and arranges the exchange air hole on the central air pipe, when the central premix burner is used, the combustion-supporting air is led into the shell and the central air pipe, the fuel gas is led into the pipe body, part of the combustion-supporting air of the central air pipe enters the pipe body from the exchange air hole, and is premixed with the fuel gas and then is sprayed out of the burner head to be mixed with the combustion-supporting air flowing out of the shell again, thereby realizing that the gas of the pipe body is mixed once before being sprayed out of the burner head, improving the gas mixing efficiency of the central premix burner, ensuring the uniform mixing of the combustion-supporting air and the fuel gas, avoiding that the combustion-supporting air or the fuel gas is sucked away by the negative pressure in the kiln, leading to the unbalanced mixing ratio of the fuel gas and the combustion-supporting air and insufficient combustion, the flame temperature is too low, the, the problem of low combustion efficiency; in addition, the producer can adjust and adjust flame length and combustion condition through the airflow of control center tuber pipe to make the burning of gas more abundant, flame shortens, and reaction time is shorter, and flame temperature is higher, improves combustion efficiency.

Preferably, the front end of the central air pipe is provided with an air outlet, and the burner tip is connected with the air outlet; the central air pipe is of a hollow structure, so that production of production personnel is facilitated, and production difficulty and production cost are reduced.

Preferably, the burner head is provided with a central hole corresponding to the air outlet; through setting up the centre bore, make not follow the partial combustion-supporting gas that the exchange gas pocket enters into in the body, participate in the burning outside the burner tip of centre bore blowout, mix once more with the gas to ensure that there is sufficient combustion-supporting gas to mix with the gas.

Preferably, the central air pipe is inserted into the inner side of the central hole, and a guide curved surface is arranged on one side of the central hole towards the central air pipe; when a manufacturer installs the central air pipe into the pipe body, the front end of the central air pipe can slide into the inner side of the central hole under the guidance of the guiding curved surface, so that the alignment installation of the central air pipe and the burner head is realized.

Preferably, a positioning step is arranged on the outer side of the air outlet, and when the central air pipe is inserted into the central hole, the positioning step abuts against one side, facing the central air pipe, of the central hole; the central air pipe adopts the arrangement mode, so that the central air pipe can be installed in place when being installed on the burner head.

Preferably, the guide part is formed by extending the inner side of the central hole in the sleeve direction; through setting up the guide part, can avoid centre bore spun combustion-supporting gas and first gas hole spun gas to influence each other, influence flame intensity.

Preferably, the first gas holes are provided with a plurality of first gas holes which are equidistantly arranged around the central hole, and the arrangement mode ensures that gas is uniformly sprayed out from different directions of the front end of the burner head.

Preferably, the burner head comprises a disc-shaped body, a boss is arranged on the outer side of the disc-shaped body, the first air outlet is arranged on the disc-shaped body, the first gas holes are arranged on the boss, and a plurality of second gas holes are uniformly arranged on the side part of the boss; the second gas hole is arranged on the burner head, so that part of gas in the pipe body is sprayed out from the second gas hole and is mixed with the combustion-supporting gas of the first air outlet hole and then is ignited, and the combustion efficiency of the gas is improved.

Preferably, a plurality of ventilation grooves are formed in the outer side wall of the disc-shaped body, and the air outlet ends of the ventilation grooves are inclined towards the central axis direction of the burner head; through set up on the disc-shaped body lateral wall the ventilation groove makes the combustion-supporting gas who spouts to the nozzle head from the body can form the heliciform air current to drive the gaseous flow in nozzle head the place ahead, make combustion efficiency improve.

Preferably, a second air outlet hole is formed in the position, sleeved with the sleeve, of the shell; through setting up the second exhaust vent, will the utility model discloses install to the kiln after, the second exhaust vent flow direction can be followed to combustion-supporting gas the casing with between the sleeve to make combustion-supporting gas carry out multistage mixture outside the nozzle head, realize that multistage combustion-supporting wind and gas are supplied with, the staged combustion, the gas mixing effect further improves, and reaction time is shorter, and flame shortens, and flame temperature can be higher, and the burning is more abundant, and it is more energy-conserving to use on the kiln.

Drawings

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

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is an exploded view of the present invention;

FIG. 4 is a cross-sectional view of the central air duct;

fig. 5 is a cross-sectional view of a burner head.

Description of reference numerals:

1 sleeve, 2 casings, 20 openings, 21 inner cavities, 22 first air inlets, 23 second exhaust vents, 3 tubes, 31 air inlets, 32 air outlets, 4 central air pipes, 41 second air inlets, 42 exchange air holes, 43 air outlets, 44 positioning steps, 5 ignition electrodes, 6 burner heads, 61 first gas holes, 62 first exhaust vents, 63 central holes, 630 guide curved surfaces, 64 guide parts, 65 dish-shaped bodies, 66 bosses, 67 second gas holes, 68 ventilation grooves and 69 electrode holes.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings:

referring to fig. 1 to 5, the central premix burner of this embodiment includes a sleeve 1, a casing 2, a tube body 3, a central air duct 4, and an ignition electrode 5, where the casing 2 has an inner cavity 21 with a front opening 20, the sleeve 1 is sleeved on the opening 20, the casing 2 is provided with a first air inlet 22 communicating with the outside and the inner cavity 21, the tube body 3 and the ignition electrode 5 are disposed in the inner cavity 21, the tube body 3 is provided with an air inlet 31 extending to the outside of the casing 2, the front side of the tube body 3 is provided with an air outlet 32, a burner tip 6 is disposed between the air outlet 32 and the opening 20, the ignition electrode 5 penetrates through the burner tip 6, the burner tip 6 is provided with a first gas hole 61 corresponding to the tube body 3, and a first air outlet hole 62 is disposed between the first gas hole 61 and the outer edge of the burner tip 6; the central air pipe 4 is arranged in the pipe body 3, a second air inlet 41 extending to the outer side of the shell 2 is arranged on the central air pipe 4, and an exchange air hole 42 is arranged on the central air pipe 4.

Referring to fig. 2 and 4, an air outlet 43 is arranged at the front end of the central air duct 4, and the burner tip 6 is connected with the air outlet 43; the central air pipe 4 is of a hollow structure, so that production of production personnel is facilitated, and production difficulty and production cost are reduced.

Referring to fig. 2 and 5, the burner tip 6 is provided with a central hole 63 corresponding to the air outlet 43; through the arrangement of the central hole 63, part of the combustion-supporting gas which does not enter the tube body 3 from the exchange air hole 42 is sprayed out of the burner tip 6 from the central hole 63 to participate in combustion and is mixed with the fuel gas again, so that sufficient combustion-supporting gas and fuel gas are ensured to be mixed.

Referring to fig. 2 and 5, the central air duct 4 is inserted into the inner side of the central hole 63, and a guiding curved surface 630 is arranged on one side of the central air duct 4, facing the central hole 63; when a manufacturer installs the central air pipe 4 into the pipe body 3, the front end of the central air pipe 4 can slide into the inner side of the central hole 63 under the guidance of the guiding curved surface 630, so that the alignment installation of the central air pipe 4 and the burner head 6 is realized.

Referring to fig. 2 and 4, a positioning step 44 is arranged outside the air outlet 43, and when the central air duct 4 is inserted into the central hole 63, the positioning step 44 abuts against one side of the central air duct 4 from the central hole 63; the central air pipe 4 adopts the arrangement mode, so that the central air pipe 4 can be installed in place when being installed on the burner head 6.

Referring to fig. 2 and 5, a guide part 64 is formed inside the central hole 63 and extends towards the sleeve 1; through setting up guide part 64, can avoid centre bore 63 spun combustion-supporting gas and the gas of first gas hole 61 spun to influence flame intensity each other.

Referring to fig. 5, the first gas holes 61 are provided with a plurality of first gas holes 61, and the first gas holes 61 are equidistantly arranged around the central hole 63, so that the gas can be uniformly sprayed from different directions at the front end of the burner head 6.

Referring to fig. 5, the burner tip 6 includes a disc-shaped body 65, a boss 66 is disposed on an outer side of the disc-shaped body 65, the first air outlet 62 is disposed on the disc-shaped body 65, the first gas hole 61 is disposed on the boss 66, and a plurality of second gas holes 67 are uniformly disposed on a side portion of the boss 66; the second air holes 67 are arranged on the burner head 6, so that part of the gas in the pipe body 3 is sprayed out from the second air holes 62, is mixed with the combustion-supporting gas in the first air outlet holes 62 and is ignited, and the combustion efficiency of the gas is improved.

Referring to fig. 5, a plurality of ventilation grooves 68 are formed in the outer side wall of the disc-shaped body 65, and the air outlet ends of the ventilation grooves 68 are inclined toward the central axis of the burner head 6; the ventilation groove 68 is formed in the outer side wall of the disc-shaped body 65, so that combustion-supporting gas sprayed from the pipe body 3 to the burner head 6 can form spiral airflow, and the flow of gas in front of the burner head 6 is driven, so that the combustion efficiency is improved.

Referring to fig. 5, the disk-shaped body 65 is provided with an electrode hole 69 corresponding to the ignition electrode 5.

Referring to fig. 2 and 3, a second air outlet 23 is formed in the housing 2 at a position where the sleeve 1 is sleeved; through setting up second exhaust vent 23, will the utility model discloses install to the kiln after, the second exhaust vent 23 flow direction can be followed to combustion-supporting gas casing 2 with between the sleeve 1 to make combustion-supporting gas carry out multistage mixture outside nozzle head 6, realize that multistage combustion-supporting wind and gas are supplied with, the staged combustion, the gas mixing effect further improves, reaction time is shorter, flame shortens, and flame temperature can be higher, and the burning is more abundant, and it is more energy-conserving to use on the kiln.

Compared with the prior art, the central premix burner of the utility model adds the central air pipe 4 in the pipe body 3 and arranges the exchange air hole 42 on the central air pipe 4, when the utility model is used, the combustion-supporting air is introduced into the shell 2 and the central air pipe 4, the fuel gas is introduced into the pipe body 3, part of the combustion-supporting air of the central air pipe 4 enters the pipe body 3 from the exchange air hole 42, and is premixed with the fuel gas and then is sprayed out of the burner tip 6 to be mixed with the combustion-supporting air flowing out of the shell 2 again, thereby realizing that the gas of the pipe body 3 is mixed once before being sprayed out of the burner tip 6, improving the gas mixing efficiency of the utility model, ensuring the uniform mixing of the combustion-supporting air and the fuel gas, avoiding the occurrence of unbalanced mixing ratio of the fuel gas and the combustion-supporting air and insufficient combustion due to the suction of the combustion-supporting air or the fuel gas by the negative pressure in the kiln, and the, the problems of high energy consumption and low combustion efficiency are caused by overlong flame; in addition, the producer can adjust and adjust the flame length and the combustion condition through the air flow of the central air pipe 4, so that the combustion of fuel gas is more sufficient, the flame is shortened, the reaction time is shorter, the flame temperature is higher, and the combustion efficiency is improved.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The central premix burner is characterized by comprising a sleeve, a shell, a pipe body, a central air pipe and an ignition electrode, wherein the shell is provided with an inner cavity with an open front end, the sleeve is sleeved on the opening, the shell is provided with a first air inlet communicated with the outside and the inner cavity, the pipe body and the ignition electrode are arranged in the inner cavity, the pipe body is provided with an air inlet extending to the outer side of the shell, the front side of the pipe body is provided with an air outlet, a burner head is arranged between the air outlet and the opening, the ignition electrode penetrates out of the burner head, the burner head is provided with a first gas hole corresponding to the pipe body, and a first air outlet hole is arranged between the first gas hole and the outer edge of the burner head;

the central air pipe is arranged in the pipe body, a second air inlet extending to the outer side of the shell is formed in the central air pipe, and an exchange air hole is formed in the central air pipe.

2. The central premix burner as recited in claim 1, wherein an air outlet is provided at a front end of the central air duct, and the burner tip is connected to the air outlet.

3. The central premix burner as in claim 2, wherein said burner head is provided with a central hole corresponding to said air outlet.

4. The central premix burner as in claim 3, wherein the central air duct is inserted inside the central hole, and the central hole is provided with a guiding curve toward one side of the central air duct.

5. The central premix burner as in claim 3, wherein a positioning step is provided outside the air outlet, and when the central air duct is inserted into the central hole, the positioning step abuts against a side of the central air duct facing the central air duct.

6. The central premix burner of claim 3, wherein the pilot is formed by a lateral sleeve direction extension within the central bore.

7. The central premix burner as in claim 3, wherein the first gas holes are provided in a plurality, and wherein the plurality of first gas holes are equidistantly disposed around the central bore.

8. The central premix burner as recited in claim 1, wherein the burner tip comprises a disc-shaped body, a boss is disposed outside the disc-shaped body, the first air outlet is disposed on the disc-shaped body, the first gas outlet is disposed on the boss, and a plurality of second gas holes are uniformly disposed on a side portion of the boss.

9. The central premix burner as recited in claim 8, wherein a plurality of ventilation slots are formed on an outer sidewall of the disk-shaped body, and an air outlet end of each ventilation slot is inclined toward a central axis of the burner head.

10. The central premix burner as in claim 1, wherein a second air outlet is provided in the housing at a location where the sleeve is disposed.