CN219510799U - Low NOx, energy-saving dual-purpose heat accumulating type burner - Google Patents

Abstract

The utility model discloses a low NOx and energy-saving dual-purpose heat accumulating type burner, which comprises a burner box body and an air distribution device; the air distribution device comprises an air distribution body, a pulse sealing three-way valve, a smoke exhaust pipeline and a combustion-supporting air inlet pipeline; the same side wall of the burner box body is provided with an upper burner and a lower burner which are independent respectively, and one burner at the upper part is a high-speed straight flame burner or a flat flame burner; the lower set of burner nozzles are high-speed straight flame burner nozzles or flat flame burner nozzles; the further improvement is that: the upper burner wall body and the lower burner wall body are respectively provided with an upper burner secondary combustion flame-out port and a lower burner secondary combustion flame-out port; an expansion joint is arranged between the air distribution body and the pulse sealing three-way valve; an upper burner ultraviolet detector is arranged on the upper burner ignition gun; the lower burner ultraviolet detector is arranged on the lower burner ignition gun. The utility model can realize the dual-purpose function of one furnace in the gas industrial furnace, saves energy and has less NOx emission.

Description

Low NOx, energy-saving dual-purpose regenerative burner

technical field

The utility model relates to a burner, in particular, the utility model relates to a regenerative burner arranged in an industrial kiln and using gas as an energy source.

Background technique

Existing gas-fired industrial furnaces are generally heated by regenerative gas burners. Forging heating gas industrial furnaces generally use flat flame burners with high power; heat treatment heating gas industrial furnaces generally use high-speed straight flame burners, the flame hot air flow speed is fast, and the furnace gas is stirred vigorously, so that the furnace temperature uniformity is good. Some sites are small, and only one gas-fired industrial furnace can be arranged. This gas-fired industrial furnace needs to be used for dual purposes, that is, it can be used for forging heating and heat treatment heating. However, the existing regenerative gas The burner has only one burner, which cannot meet the dual-purpose function of a gas industrial furnace.

Contents of the invention

The utility model aims at the deficiencies of the prior art, and proposes a low NOx, energy-saving dual-purpose regenerative burner that can realize the dual-purpose function of a gas industrial furnace.

The utility model realizes the technical goal through the following technical solutions.

Low NOx, energy-saving dual-purpose regenerative burner, including a burner box and an air distribution device; the burner box is a vertical cabinet structure with a vertical first through hole; the air distribution device includes Air distribution body, pulse sealing three-way valve, flue gas discharge pipe, combustion air intake pipe; the air distribution body is a two-way pipe fitting, the lower end communicates with the upper end of the first through hole of the burner box, and the upper end communicates with the pulse sealing three The main pipe end of the through valve is connected; the other two ends of the pulse-sealed three-way valve are respectively connected with the flue gas discharge pipe and the combustion-supporting air intake pipe. Proportional valve; the improvement is that: on the same side wall of the burner box, there are two sets of independent burners, the upper part and the lower part, wherein, the upper set of burners includes the upper part of the burner wall; The above-mentioned upper burner wall is embedded on the side wall of the burner box, and the upper burner nozzle with the central axis lying flat, and the other end hole coaxial with the upper burner nozzle penetrates through the first burner box. A through hole with a built-in upper burner plug; the upper burner plug is provided with an upper burner gas inlet and an upper burner ignition gun; The upper burner block and the upper burner honeycomb regenerator are arranged in the first through hole of the device box; the lower set of burners includes the lower burner wall; the lower burner wall is embedded in the combustion chamber. On the side wall of the burner box, there is a lower burner nozzle whose central axis is flat, and the other end hole coaxial with the lower burner nozzle penetrates through the first through hole of the burner box, and a lower burner plug is built in; The lower burner plug is provided with a gas inlet of the lower burner and an ignition gun of the lower burner; The lower burner block, the lower burner honeycomb heat storage body; the upper grid is provided between the upper end of the burner box and the air distribution body, and the lower grid is provided at the lower end of the burner box; the combustion On both sides of the upper burner block and the lower burner block, vertical flue gas and combustion-supporting air bridge passages are arranged on the box body; the upper grid and the lower grid are box-shaped components closed around; The upper end of the upper grid is provided with through holes to communicate with and seal the lower end of the air distribution body, and the lower end is provided with a number of through holes respectively connected to the upper end of the first through hole of the burner box, and the upper end of the flue gas and combustion-supporting air bridge passage. Sealed connection; the upper end of the lower grid is provided with a number of through holes which are respectively connected and sealed with the lower end of the first through hole of the burner box, the flue gas and the lower end of the combustion-supporting air bridge passage.

Further, the upper burner wall is evenly distributed with several upper burner secondary combustion vents around the upper burner vent; the lower burner wall is evenly distributed with several lower burner vents The lower part of the burner has a secondary combustion nozzle.

Further, an expansion joint is provided between the air distribution body and the pulse-sealed three-way valve.

Further, the upper set of burners are high-speed direct flame burners or flat flame burners; the lower set of burners are high-speed direct flame burners or flat flame burners.

Further, the upper burner igniter is provided with an upper burner ultraviolet detector; the lower burner igniter is provided with a lower burner ultraviolet detector.

Compared with the prior art, the utility model has the following positive effects:

1. On the same side wall of the burner box, there are two sets of independent burners on the upper and lower parts. The upper set of burners is a high-speed straight flame burner or flat flame burner, and the lower set of burners is High-speed direct flame burner or flat flame burner, in this way, it can be used not only for forging heating, but also for heat treatment heating, so that the gas industrial furnace can realize the dual-purpose function of one furnace.

2. The upper burner wall is evenly distributed with several upper burner secondary combustion nozzles around the upper burner nozzle, and the lower burner wall is evenly distributed with several lower burner secondary combustion nozzles around the lower burner nozzle. In this way, the gas burns fully, which can not only significantly improve the combustion efficiency, save energy, but also significantly reduce NOx emissions.

3. There is an expansion joint between the air distribution body and the pulse sealing three-way valve, which can slow down the vibration, compensate the displacement of the burner box, the air distribution body, and the pulse sealing three-way valve, and effectively protect the utility model.

4. The upper burner ignition gun is equipped with an upper burner ultraviolet detector, and the lower burner ignition gun is equipped with a lower burner ultraviolet detector to protect the combustion and ignition.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a view along the direction A of Fig. 1 .

Fig. 3 is a sectional view of the utility model.

Fig. 4 is a schematic diagram of smoke exhaust during the smoke exhaust cycle of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

The low NOx, energy-saving dual-purpose regenerative burner shown in accompanying drawings 1 to 3 includes a burner box 1, an air distribution device, and two sets of independent burners at the upper and lower parts; the burner box 1 is a vertical cabinet type structure, with a vertical first through hole 111; the air distribution device includes an air distribution body 2, an expansion joint 3, a pulse-sealed three-way valve 4, a smoke exhaust pipe 6, and a combustion air intake pipe 7; the air distribution body 2 is a two-way pipe fitting, the lower end communicates with the upper end of the first through hole 111 of the burner box 1, the upper end communicates with the lower end of the expansion joint 3 and is sealed, and the upper end of the expansion joint 3 communicates with the main pipe end of the pulse-sealed three-way valve 4; pulse-sealed The other two ends of the three-way valve 4 communicate with the flue gas discharge pipe 6 and the combustion-supporting air intake pipe 7 respectively, and the smoke discharge pipe 6 and the combustion-supporting air intake pipe 7 are respectively provided with an air-smoke proportional valve 5 .

The upper and lower sets of independent burners are arranged on the same side wall of the burner box 1, and the upper set of burners is a high-speed straight-flame burner (in other embodiments, the upper set of burners is a flat-flame burner) burner); a set of burners in the bottom is a flat flame burner (in other embodiments, a set of burners in the top is a high-speed direct flame burner).

The upper set of burners includes an upper burner wall 11; the upper burner wall 11 is embedded on the side wall of the burner box 1, and is provided with an upper burner nozzle 10 with a central axis parallel to the upper burner. The other end hole of the coaxial line of the burner port 10 passes through the first through hole 111 of the burner box body 1, and the upper burner plug 14 is built in; the upper burner plug 14 is provided with an upper burner gas inlet 15, an upper burner Nozzle ignition gun 16, the upper burner ignition gun 16 is provided with an upper burner ultraviolet detector 17; the upper burner flame outlet 10 is provided with an upper part in the first through hole 111 of the burner box 1 above the other end hole of the coaxial line. Burner blocking brick 13, upper burner honeycomb regenerator 19.

The lower set of burners includes a lower burner wall 21; the lower burner wall 21 is embedded on the side wall of the burner box 1, and is provided with a lower burner nozzle 20 with a central axis parallel to the lower burner. The other end hole of the coaxial line of the flame port 20 runs through the first through hole 111 of the burner box body 1, and the lower burner plug 24 is built in; the lower burner plug 24 is provided with a lower burner gas inlet 25, a lower burner Nozzle ignition gun 26, the lower burner ignition gun 26 is provided with a lower burner ultraviolet detector 27; the lower burner flame outlet 20 is provided with a lower burner box 1 first through hole 111 below the other end hole of the coaxial line. Burner blocking brick 23, lower burner honeycomb regenerator 29.

There is an upper grid 9 between the upper end of the burner box 1 and the air distribution body 2, and a lower grid 30 at the lower end of the burner box 1; Both sides of the block 24 are provided with vertical flue gas and combustion-supporting air bridge passages 8. In this embodiment, the flue gas and combustion-supporting air bridge passages 8 are symmetrically distributed on the upper burner block 14 and the lower burner block. 24 on both sides; the upper grid 9 and the lower grid 30 are box-shaped members closed around; The holes are connected and sealed to the upper end of the first through hole 111 of the burner box 1 and the upper end of the flue gas and combustion-supporting air bridge passage 8, and two of the through holes are respectively connected to the upper burner plug 14 and the lower burner plug 24 The upper ends of the flue gas and combustion-supporting air bridge passage 8 on both sides are connected and sealed. The number of through holes at the lower end of the upper grid 9 .

The upper end of the lower grid 30 is provided with 3 through holes respectively connected with the lower end of the first through hole 111 of the burner box 1, the lower end of the communication flue gas and the lower end of the combustion-supporting air bridge channel 8, and the two through holes are connected with the upper end respectively. The burner plug 14, the flue gas on both sides of the lower burner plug 24 and the lower end of the combustion-supporting air bridge channel 8 are connected and sealed. And the structure of the lower end of the combustion-supporting air bridge channel 8 determines the number of through holes at the upper end of the lower grid 30 .

Top burner walls 11 are evenly distributed with 6 upper burner secondary combustion flame vents 12 around the top burner vents 10 (in other embodiments, the upper burner walls 11 are uniformly distributed around the top burner vents 10). 2 to 5 or more than 6 upper burner secondary combustion vents 12); the lower burner wall 21 is uniformly distributed around the lower burner vent 20 and 6 lower burner secondary combustion vents 22 (the lower burner wall body 21 is uniformly distributed around the lower burner flame port 20, with 2 to 5 or more than 6 lower burner secondary combustion flame ports 22).

During the combustion cycle, the order in which the combustion air enters is:

Upper burner:

Combustion air intake pipe 7→air-smoke proportional valve 5→pulse seal three-way reversing valve 4→expansion joint 3→air distribution body 2→upper grid 9→upper burner honeycomb regenerator 19→upper burner block Brick 13→top burner nozzle 10.

Lower burner:

Combustion-supporting air intake pipe 7→air-smoke proportional valve 5→pulse seal three-way reversing valve 4→expansion joint 3→air distribution body 2→upper grid 9→flue gas and combustion-supporting air bridge channel 8→lower grid 30 → the lower burner honeycomb regenerator 29 → the lower burner blocking brick 23 → the lower burner flame nozzle 20 .

During the smoke exhaust cycle, the sequence of smoke exhaust is (as shown in Figure 4, the arrow in the figure is the smoke exhaust direction):

Upper burner:

Upper burner spout 10→Upper burner retaining brick 13→Upper burner honeycomb regenerator 19→Upper grid 9→Air distribution body 2→Expansion joint 3→Pulse seal three-way reversing valve 4→Air and smoke ratio Valve 5 → flue gas discharge pipe 6.

Lower burner:

Lower burner flame outlet 20→lower burner retaining brick 23→lower burner honeycomb regenerator 29→lower grid 30→flue gas and combustion-supporting air bridge channel 8→upper grid 9→air distribution body 2→expansion joint 3→Pulse sealing three-way reversing valve 4→Air-smoke proportional valve 5→Smoke discharge pipe 6.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the description of the present invention. In at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not exhaust all details, nor do they limit the utility model to the described specific implementations. Obviously, many modifications and variations can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. The invention is to be limited only by the claims and their full scope and equivalents.

Claims (5)

1. A low NOx, energy-saving dual-purpose regenerative burner, comprising a burner box (1) and an air distribution device; the burner box (1) is a vertical cabinet structure, and is provided with a vertical first A through hole (111); the air distribution device includes an air distribution body (2), a pulse-sealed three-way valve (4), a flue gas discharge pipe (6), and a combustion-supporting air intake pipe (7); the air distribution The body (2) is a two-way pipe fitting, the lower end communicates with the upper end of the first through hole (111) of the burner box (1), and the upper end communicates with the main pipe end of the pulse-sealed three-way valve (4); the pulse-sealed three-way valve The other two ends of (4) communicate with the flue gas discharge pipe (6) and the combustion-supporting air intake pipe (7) respectively. Flue gas proportional valve (5); It is characterized in that two sets of independent burners are provided on the same side wall of the burner box (1), the upper part and the lower part, wherein the upper set of burners includes an upper burner wall (11); The upper burner wall (11) is embedded on the side wall of the burner box (1), and is provided with an upper burner nozzle (10) with the central axis flat, which is the same as the upper burner nozzle (10). The other end hole of the axis passes through the first through hole (111) of the burner box (1), and the upper burner plug (14) is built in; the upper burner plug (14) is provided with an upper burner gas inlet Gas port (15), upper burner ignition gun (16); the first through hole (111) of the burner box (1) above the other end hole of the coaxial line of the upper burner nozzle (10) is provided with Upper burner blocking brick (13), upper burner honeycomb regenerator (19); The lower set of burners includes a lower burner wall (21); the lower burner wall (21) is embedded on the side wall of the burner box (1), and is provided with a lower part with a central axis The burner nozzle (20), the other end hole coaxial with the lower burner nozzle (20) runs through the first through hole (111) of the burner box (1), and the lower burner plug (24) is built in; The lower burner plug (24) is provided with a lower burner gas inlet (25) and a lower burner ignition gun (26); A lower burner block (23) and a lower burner honeycomb regenerator (29) are arranged in the first through hole (111) of the burner box (1); An upper grid (9) is provided between the upper end of the burner box (1) and the air distribution body (2), and a lower grid (30) is provided at the lower end of the burner box (1); The burner box (1) is provided with vertical flue gas and combustion-supporting air bridge passages (8) on both sides of the upper burner plug (14) and the lower burner plug (24); the upper grid (9), the lower grid (30) is a box-shaped member closed around; The through holes are respectively connected and sealed to the upper end of the first through hole (111) of the burner box (1), the upper end of the flue gas and combustion-supporting air bridge channel (8); the upper end of the lower grid (30) is provided with several The through holes communicate with the lower end of the first through hole (111) of the burner box (1) and the lower end of the passage (8) communicating with flue gas and combustion-supporting air respectively, and are sealed and connected. 2. The low NOx, energy-saving dual-purpose regenerative burner according to claim 1, characterized in that: the upper burner wall (11) is evenly distributed around the upper burner nozzle (10). Two upper burner secondary combustion nozzles (12); the lower burner wall (21) is evenly distributed with several lower burner secondary combustion nozzles (22) around the lower burner nozzle (20). 3. The low NOx, energy-saving dual-purpose regenerative burner according to claim 2, characterized in that an expansion joint ( 3). 4. The low NOx, energy-saving dual-purpose regenerative burner according to any one of claims 1 to 3, characterized in that: the upper set of burners is a high-speed direct flame burner or a flat flame burner; The lower set of burners are high-speed direct flame burners or flat flame burners. 5. The low NOx, energy-saving dual-purpose regenerative burner according to claim 4, characterized in that: the upper burner ignition gun (16) is provided with an upper burner ultraviolet detector (17); Described bottom burner ignition snatch (26) is provided with bottom burner ultraviolet detector (27).