CN214094449U

CN214094449U - Ultralow nitrogen combustor intelligence control system

Info

Publication number: CN214094449U
Application number: CN202023345517.4U
Authority: CN
Inventors: 朱容君; 蔡权; 王鹏展; 方晓强; 刘加林
Original assignee: Nanyang Zhongtong Thermal Energy Equipment Co ltd
Current assignee: Nanyang Zhongtong Thermal Energy Equipment Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-08-31
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses an ultra-low nitrogen burner intelligent control system, which relates to the technical field of burners and solves the technical problem of high NOx emission of the existing burner; the combustor body comprises a gas pipe, a first combustion assisting gas pipe and an inner circulating pipe, a first combustion assisting gas channel is formed in a gap between the gas pipe and the first combustion assisting gas pipe, the first combustion assisting gas channel is communicated with an air outlet of a first air blower, a first combustion assisting gas pipe inner cavity at the outlet end of the gas pipe forms a first combustion area, an igniter and a first temperature sensor are arranged in the first combustion area, an inner circulating air passage is formed in a gap between the first combustion assisting gas pipe and the inner circulating pipe, and the inner circulating air passage is communicated with an air inlet of the first air blower through an inner circulating connecting pipe; the outer circulating pipe is provided with a first regulating valve, the fuel gas pipe is provided with a second regulating valve, and the first air pipe is provided with a third regulating valve.

Description

Ultralow nitrogen combustor intelligence control system

Technical Field

The utility model relates to a combustor technical field, more specifically say, it relates to an ultra-low nitrogen combustor intelligence control system.

Background

The low-nitrogen combustor is equipment for increasing an air blower, an induced draft fan and a frequency converter of a traditional combustor, integrating a control valve and a plurality of circuits to enable clean energy and combustor operation to provide high-efficiency heat energy for a boiler. NOx emissions at 30mg/Nm³Hereinafter generally referred to as ultra-low nitrogen burners. The existing ultra-low nitrogen burner has a simple structure, only meets the burning function, has less safety consideration, and has poor accuracy, often overproof emission and poor working stability due to the fact that the supply of combustion-supporting air is manually adjusted.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, the utility model aims at providing an ultra-low nitrogen combustor intelligence control system.

The technical scheme of the utility model is that: an intelligent control system of an ultra-low nitrogen burner comprises a controller, a first air blower and a burner body inserted and installed in a boiler, wherein an air inlet of the first air blower is provided with a first air pipe and an external circulating pipe connected with an exhaust pipe of the boiler; the combustor body comprises a gas pipe, a first combustion assisting gas pipe and an inner circulating pipe, wherein the first combustion assisting gas pipe is sleeved on the periphery of the gas pipe, the inner circulating pipe is sleeved on the periphery of the first combustion assisting gas pipe, a first combustion assisting gas channel is formed in a gap between the gas pipe and the first combustion assisting gas pipe, the first combustion assisting gas channel is communicated with an air outlet of the first air blower, a first combustion area is formed in an inner cavity of the first combustion assisting gas pipe at the outlet end of the gas pipe, an igniter and a first temperature sensor are arranged in the first combustion area, an inner circulating air channel is formed in a gap between the first combustion assisting gas pipe and the inner circulating pipe, and the inner circulating air channel is communicated with an air inlet of the first air blower through an inner circulating connecting pipe; the outer circulation pipe is provided with a first regulating valve, the fuel gas pipe is provided with a second regulating valve, the first air pipe is provided with a third regulating valve, and the controller is electrically connected with the first air blower, the igniter, the first temperature sensor, the first regulating valve, the second regulating valve and the third regulating valve.

As a further improvement, a swirler is arranged on the periphery of the outlet end of the gas pipe.

Further, the first combustion area is of a structure with one large end and the other small end, and the small end of the first combustion area is close to the outlet end of the gas pipe.

Further, the shell of the burner body is provided with a second temperature sensor which is electrically connected with the controller.

Furthermore, a protective cover is arranged on the periphery of the inner circulation pipe.

Further, the gas-fired controller comprises a second air blower electrically connected with the controller, a second gas-fired assisting pipe is inserted in a gap between the first gas-fired assisting pipe and the inner circulating pipe, a second gas-fired assisting passage is formed in a gap between the first gas-fired assisting pipe and the second gas-fired assisting pipe, the second gas-fired assisting passage is communicated with an air outlet of the second air blower through a second gas-fired assisting connecting pipe, and the inner circulating passage is formed in a gap between the second gas-fired assisting pipe and the inner circulating pipe.

Furthermore, the second combustion-supporting air pipe protrudes out of the first combustion-supporting air pipe and forms a second combustion area, a third temperature sensor is arranged in the second combustion area, a fourth regulating valve is arranged at an air inlet of the second air blower, and the controller is electrically connected with the third temperature sensor and the fourth regulating valve.

Further, a conical sleeve is arranged in the second combustion zone.

Advantageous effects

Compared with the prior art, the utility model, the advantage that has does:

1. the utility model discloses an inner loop and extrinsic cycle introduce first combustion area with the flue gas, form rich fuel mixture part fuel and burn, and fuel separates out the volatile in the lower flame of lean oxygen and flame temperature, thereby the flame temperature is lower suppresses nitrogen oxide's formation during the pyrolysis reaction, makes nitrogen oxide discharge to reach standard, realizes low temperature burning reduction NOx's formation, realizes abundant burning simultaneously.

2. The utility model discloses a shell temperature of second temperature sensor real-time detection combustor body, when combustor casing body apparent temperature exceeded the settlement temperature, combustor automatic shutdown work and reported to the police, improve the safety in utilization.

3. The utility model discloses a set up the second and assist the combustion air flue and carry out accurate air distribution, when realizing that low temperature burning reduces NOx and generates, realize abundant burning, improve combustion efficiency.

Drawings

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

FIG. 2 is a schematic diagram of the external circulation of the present invention;

fig. 3 is a schematic structural view of the burner body of the present invention.

Wherein: 1-controller, 2-first blower, 3-boiler, 4-burner body, 5-first air pipe, 6-exhaust pipe, 7-external circulation pipe, 8-fuel gas pipe, 9-first combustion-supporting gas pipe, 10-internal circulation pipe, 11-first combustion-supporting gas channel, 12-first combustion area, 13-igniter, 14-first temperature sensor, 15-internal circulation gas channel, 16-internal circulation connecting pipe, 17-first regulating valve, 18-second regulating valve, 19-third regulating valve, 20-swirler, 22-second temperature sensor, 23-protective cover, 24-second combustion-supporting gas pipe, 25-second combustion-supporting gas channel, 26-second combustion-supporting connecting pipe, 27-second combustion area, 28-third temperature sensor, 29-conical sleeve, 30-internal circulation hole.

Detailed Description

The invention will be further described with reference to specific embodiments shown in the drawings.

Referring to fig. 1-3, an intelligent control system for an ultra-low nitrogen burner comprises a controller 1, a first blower 2, and a burner body 4 inserted into a boiler 3. The air inlet of the first blower 2 is provided with a first air pipe 5 and an external circulation pipe 7 connected with an exhaust pipe 6 of the boiler 3. The burner body 4 comprises a fuel gas pipe 8, a first combustion assisting gas pipe 9 sleeved on the periphery of the fuel gas pipe 8 and an inner circulating pipe 10 sleeved on the periphery of the first combustion assisting gas pipe 9. The clearance between fuel gas pipe 8 and the first gas pipe 9 of helping forms first gas way 11 of helping, and first gas way 11 of helping communicates the air outlet of first air-blower 2, and the first gas pipe 9 inner chamber of helping of 8 exit ends of fuel gas pipe forms first combustion area 12, is equipped with some firearm 13, first temperature sensor 14 in the first combustion area 12. An inner circulation air passage 15 is formed by a gap between the first combustion assisting gas pipe 9 and the inner circulation pipe 10, and the inner circulation air passage 15 is communicated with an air inlet of the first air blower 2 through an inner circulation connecting pipe 16. The external circulation pipe 7 is provided with a first regulating valve 17, the fuel gas pipe 8 is provided with a second regulating valve 18, the first air pipe 5 is provided with a third regulating valve 19, and the controller 1 is electrically connected with the first air blower 2, the igniter 13, the first temperature sensor 14, the first regulating valve 17, the second regulating valve 18 and the third regulating valve 19. The controller 1 detects the temperature of flame in the first combustion area 12 through the first temperature sensor 14, and introduces the flue gas into the first combustion area 12 through internal circulation and external circulation by controlling the opening degrees of the first regulating valve 17, the second regulating valve 18 and the third regulating valve 19 to form part of fuel rich in fuel mixture for combustion, volatile matters are separated out from the fuel in primary flame with low oxygen deficiency and flame temperature, the flame temperature is low so as to inhibit the generation of nitrogen oxide during pyrolysis reaction, the nitrogen oxide reaches the standard and is discharged, low-temperature combustion is realized, the generation of NOx is reduced, and meanwhile, full combustion is realized.

The periphery of the outlet end of the fuel gas pipe 8 is provided with a swirler 20 which can provide swirl air, so that the mixing of fuel gas and first combustion air is facilitated, and the combustion efficiency is improved. The first combustion zone 12 has a large end and a small end, and the small end of the first combustion zone 12 is close to the outlet end of the fuel gas pipe 8.

The shell of combustor body 4 is equipped with the second temperature sensor 22 of electric connection controller 1, through the shell temperature of second temperature sensor 22 real-time detection combustor body 4, when combustor casing body surface temperature exceeded the settlement temperature, combustor automatic shutdown work and reported to the police, improvement safety in utilization. The periphery of the internal circulation pipe 10 is provided with a protective cover 23 which can play a role of protection.

The utility model discloses still include the second air-blower of electric connection controller 1, the clearance grafting between first helping gas pipe 9 and the inner circulating pipe 10 has the second to help gas pipe 24, and first helping gas pipe 9 and the second helps the clearance between gas pipe 24 to form the second and helps gas way 25, and the second helps gas way 25 to communicate the air outlet of second air-blower through the combustion-supporting connecting pipe 26 of second, and the second helps the clearance between gas pipe 24 and the inner circulating pipe 10 to form inner circulating air flue 15. The second combustion-supporting gas pipe 24 protrudes out of the first combustion-supporting gas pipe 9 and forms a second combustion area 27, a third temperature sensor 28 is arranged in the second combustion area 27, a fourth regulating valve is arranged at an air inlet of the second air blower, and the controller 1 is electrically connected with the third temperature sensor 28 and the fourth regulating valve. The second combustion zone 27 is provided with a conical sleeve 29 for guiding the combustion air in the second combustion assisting gas channel 25 to the middle of the second combustion zone 27 to improve the mixing uniformity. The controller 1 detects the temperature of the flame in the second combustion area 27 through the third temperature sensor 28, and controls the opening of the fourth regulating valve to realize accurate air distribution of the second combustion-supporting air passage, so that the low-temperature combustion is realized, the generation of NOx is reduced, meanwhile, the full combustion is realized, and the combustion efficiency is improved.

The above is only a preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility of the invention and the utility of the patent.

Claims

1. The intelligent control system for the ultra-low nitrogen combustor is characterized by comprising a controller (1), a first air blower (2) and a combustor body (4) inserted into a boiler (3), wherein an air inlet of the first air blower (2) is provided with a first air pipe (5) and an external circulation pipe (7) connected with an exhaust pipe (6) of the boiler (3); the burner body (4) comprises a fuel gas pipe (8), a first combustion-supporting gas pipe (9) sleeved on the periphery of the fuel gas pipe (8), and an inner circulating pipe (10) sleeved on the periphery of the first combustion-supporting gas pipe (9), a first combustion-supporting gas passage (11) is formed in a gap between the fuel gas pipe (8) and the first combustion-supporting gas pipe (9), the first combustion-supporting gas passage (11) is communicated with an air outlet of the first blower (2), the inner cavity of the first combustion-supporting gas pipe (9) at the outlet end of the fuel gas pipe (8) forms a first combustion area (12), an igniter (13) and a first temperature sensor (14) are arranged in the first combustion zone (12), a gap between the first combustion assisting gas pipe (9) and the inner circulating pipe (10) forms an inner circulating air passage (15), the internal circulation air passage (15) is communicated with an air inlet of the first air blower (2) through an internal circulation connecting pipe (16); be equipped with first governing valve (17) on extrinsic cycle pipe (7), be equipped with second governing valve (18) on fuel pipe (8) be equipped with third governing valve (19) on first air pipe (5), controller (1) electric connection first air-blower (2), some firearm (13), first temperature sensor (14), first governing valve (17), second governing valve (18), third governing valve (19).

2. An intelligent control system for an ultra-low nitrogen burner, as recited in claim 1, characterized in that a swirler (20) is arranged at the periphery of the outlet end of the fuel gas pipe (8).

3. An ultra-low nitrogen burner intelligent control system as set forth in claim 1, characterized in that the first combustion zone (12) is a structure with one large end and the other small end, and the small end of the first combustion zone (12) is close to the outlet end of the fuel gas pipe (8).

4. An intelligent control system for an ultra-low nitrogen burner, as claimed in claim 1, wherein the housing of the burner body (4) is provided with a second temperature sensor (22) electrically connected with the controller (1).

5. The intelligent control system for the ultra-low nitrogen burner as claimed in claim 1, wherein a protective cover (23) is arranged on the periphery of the inner circulation pipe (10).

6. The intelligent control system for the ultra-low nitrogen burner as claimed in any one of claims 1 to 5, further comprising a second blower electrically connected to the controller (1), wherein a second combustion-supporting gas pipe (24) is inserted into a gap between the first combustion-supporting gas pipe (9) and the inner circulation pipe (10), a second combustion-supporting gas passage (25) is formed by the gap between the first combustion-supporting gas pipe (9) and the second combustion-supporting gas pipe (24), the second combustion-supporting gas passage (25) is communicated with an air outlet of the second blower through a second combustion-supporting connection pipe (26), and the inner circulation gas passage (15) is formed by the gap between the second combustion-supporting gas pipe (24) and the inner circulation pipe (10).

7. The intelligent control system for the ultra-low nitrogen burner is characterized in that the second combustion-supporting gas pipe (24) protrudes out of the first combustion-supporting gas pipe (9) and forms a second combustion area (27), a third temperature sensor (28) is arranged in the second combustion area (27), a fourth regulating valve is arranged at an air inlet of the second air blower, and the controller (1) is electrically connected with the third temperature sensor (28) and the fourth regulating valve.

8. An intelligent control system for an ultra-low nitrogen burner as claimed in claim 7, wherein a conical sleeve (29) is arranged in the second combustion zone (27).