CN216384155U

CN216384155U - Boiler capable of reducing nitrogen oxide emission

Info

Publication number: CN216384155U
Application number: CN202122424758.6U
Authority: CN
Inventors: 翟志远
Original assignee: Youlide Jiangsu Chemical Co ltd
Current assignee: Youlide Jiangsu Chemical Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-04-26
Anticipated expiration: 2031-10-09

Abstract

The utility model provides a boiler capable of reducing nitrogen oxide emission, which comprises a boiler body, wherein a smoke outlet of the boiler body is connected with a discharge flue, an air inlet of the boiler body is connected with an air inlet pipeline, one end of the discharge flue, which is far away from the boiler body, is connected with a smoke discharge chimney, the discharge flue is connected with a tail gas recovery pipe, the tail gas recovery pipe is provided with a FGR fan, the FGR fan sucks smoke in the discharge flue into the tail gas recovery pipe, and one end of the tail gas recovery pipe, which is far away from the discharge flue, is connected with the air inlet pipeline. The boiler can recover the tail gas after combustion for secondary combustion, reduces the combustion temperature and reduces the content of nitrogen oxides in the final discharged gas.

Description

Boiler capable of reducing nitrogen oxide emission

Technical Field

The utility model relates to the technical field of boilers, in particular to a boiler capable of reducing emission of nitrogen oxides.

Background

The boiler is inside temperature very high in the use, and nitrogen gas can generate nitrogen oxide with oxygen in the high temperature environment, if direct emission can cause air pollution, under the trend that the environmental protection requirement is strict day by day, need a device that can handle nitrogen oxide in the boiler tail gas at present.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the boiler capable of reducing the emission of nitrogen oxides, which can recover the tail gas after combustion for re-combustion, reduce the combustion temperature and reduce the content of the nitrogen oxides in the final exhaust gas.

In order to achieve the purpose, the boiler capable of reducing the emission of nitrogen oxides comprises a boiler body, a smoke outlet of the boiler body is connected with a discharge flue, an air inlet of the boiler body is connected with an air inlet pipeline, one end, far away from the boiler body, of the discharge flue is connected with a smoke discharge chimney, the discharge flue is connected with a tail gas recovery pipe, the tail gas recovery pipe is provided with a FGR fan, the FGR fan sucks smoke in the discharge flue into the tail gas recovery pipe, one end, far away from the discharge flue, of the tail gas recovery pipe is connected to the air inlet pipeline

Furthermore, a tail gas recovery pipe at the air inlet side of the FGR fan is provided with a filter plate for large particles, and a tail gas recovery pipe at the air outlet side of the FGR fan is provided with a fluid director

Further, an air blower is arranged at one end, away from the air inlet of the boiler body, of the air inlet pipeline, a throttle valve is arranged on the air inlet pipeline, and the tail gas recovery pipe is connected to the air inlet pipeline between the throttle valve and the boiler body

Further, a gas sampler is arranged between the throttle valve and the tail gas recovery pipe, and an oxygen sensor, a flow meter and a thermometer are connected on the gas sampler

Further, be equipped with the natural gas sprayer on the boiler body, be equipped with some firearms on the natural gas sprayer, the natural gas sprayer is connected on the natural gas line, and the tip of natural gas sprayer sets up to tubaeform

Further, a flue gas heater is arranged on the discharge flue, and the flue gas heater is arranged on the discharge flue between the tail gas recovery pipe and the boiler body

The boiler for reducing the emission of nitrogen oxides reduces the flame temperature in the combustion chamber by recovering the tail gas combusted by the boiler and then entering the combustion chamber through the external FGR fan, and is lower than the reaction generating temperature of the nitrogen oxides, thereby reducing the content of the nitrogen oxides, reducing the content of the nitrogen oxides to 38PPM and greatly reducing the air pollution.

Drawings

The present invention will be further described and illustrated with reference to the following drawings.

Fig. 1 is a schematic structural view of a boiler for reducing nitrogen oxide emissions according to a preferred embodiment of the present invention.

Reference numerals: 1. a boiler body; 11. a natural gas injector; 12. an igniter; 2. a discharge flue; 21. a flue gas heater; 3. an air intake duct; 31. a blower; 32. a throttle valve; 33. a gas sampler; 34. an oxygen sensor; 35. a flow speed device; 36. a thermometer; 4. a smoke exhaust chimney; 5. a tail gas recovery pipe; 51. an FGR fan; 52. a filter plate; 53. a fluid director.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the boiler for reducing emission of nitrogen oxides according to the preferred embodiment of the present invention includes a boiler body 1, a flue 2 is connected to a flue gas outlet of the boiler body 1, a smoke exhaust chimney 4 is connected to one end of the flue 2 away from the boiler body 1, an air inlet pipe 3 is connected to an air inlet of the boiler body 1, and an air blower 31 is disposed at one end of the air inlet pipe 3 away from the air inlet of the boiler body 1.

Be equipped with natural gas sprayer 11 on the boiler body 1, be equipped with some firearm 12 on the natural gas sprayer 11, natural gas sprayer 11 connects on the natural gas line, and the tip of natural gas sprayer 11 sets up to loudspeaker form.

Be connected with tail gas recovery pipe 5 on the discharge flue 2, be equipped with FGR fan 51 on the tail gas recovery pipe 5, FGR fan 51 inhales the flue gas in the discharge flue 2 into tail gas recovery pipe 5, and the one end that discharge flue 2 was kept away from to tail gas recovery pipe 5 is connected on admission line 3. A filter plate 52 for large particles is arranged on the tail gas recovery pipe 5 at the air inlet side of the FGR fan 51, and a fluid director 53 is arranged on the tail gas recovery pipe 5 at the air outlet side of the FGR fan 51.

The air inlet pipeline 3 is provided with a throttle valve 32, and the tail gas recovery pipe 5 is connected on the air inlet pipeline 3 between the throttle valve 32 and the boiler body 1. A gas sampler 33 is provided between the throttle valve 32 and the off-gas recovery pipe 5, and an oxygen sensor 34, a flow rate meter 35, and a thermometer 36 are connected to the gas sampler 33.

The flue gas heater 21 is arranged on the flue gas discharge 2, and the flue gas heater 21 is arranged on the flue gas discharge 2 between the tail gas recovery pipe 5 and the boiler body 1.

The above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the utility model. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents. The scope of the utility model is defined by the claims.

Claims

1. The utility model provides a reduce boiler that nitrogen oxide discharged, a serial communication port, including the boiler body, be connected with the discharge flue on the exhanst gas outlet of boiler body, be connected with admission line on the air inlet of boiler body, the one end that the boiler body was kept away from to the discharge flue is connected with the chimney of discharging fume, be connected with the tail gas recovery pipe on the discharge flue, be equipped with the FGR fan on the tail gas recovery pipe, the flue gas suction tail gas recovery pipe in FGR fan will the discharge flue, the one end that the discharge flue was kept away from to the tail gas recovery pipe is connected on admission line.

2. The boiler for reducing nitrogen oxide emissions according to claim 1, wherein said flue gas recovery duct on the inlet side of said FGR blower is provided with a filter plate for large particles, and said flue gas recovery duct on the outlet side of said FGR blower is provided with a flow deflector.

3. The boiler for reducing nitrogen oxide emissions according to claim 2, wherein an air blower is provided at an end of the air inlet duct remote from the air inlet of the boiler body, a throttle valve is provided on the air inlet duct, and the exhaust gas recovery pipe is connected to the air inlet duct between the throttle valve and the boiler body.

4. The boiler for reducing nitrogen oxide emissions according to claim 3, wherein a gas sampler is provided between the throttle valve and the exhaust gas recovery pipe, and an oxygen sensor, a flow meter and a thermometer are connected to the gas sampler.

5. The boiler for reducing emission of nitrogen oxides according to claim 1, wherein a natural gas injector is arranged on the boiler body, an igniter is arranged on the natural gas injector, the natural gas injector is connected to a natural gas pipeline, and the end of the natural gas injector is in a horn shape.

6. The boiler for reducing emission of nitrogen oxides according to claim 1, wherein a flue gas heater is arranged on the discharge flue, and the flue gas heater is arranged on the discharge flue between the tail gas recovery pipe and the boiler body.