CN213777693U

CN213777693U - Heating furnace system with efficient combustion and low-nitrogen smoke emission

Info

Publication number: CN213777693U
Application number: CN202022509156.6U
Authority: CN
Inventors: 于兴辉; 赵勍; 张涛
Original assignee: Luoyang Lebang Petrochemical Equipment Co ltd
Current assignee: Luoyang Lebang Petrochemical Equipment Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-07-23
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a heating furnace system with high-efficiency combustion and low-nitrogen smoke emission, which comprises a radiation chamber and a fan, wherein the bottom end of the radiation chamber is provided with a high-efficiency combustor, the top end of the radiation chamber is provided with a convection chamber, the top end of the convection chamber is provided with an air preheater, the top end of the air preheater is provided with a chimney, the air outlet of the fan is connected with a cold air duct pipeline, the high-efficiency combustor is connected with a hot air duct pipeline, the cold air duct pipeline and the hot air duct pipeline are connected, the joint position of the cold air duct pipeline and the hot air duct pipeline is arranged inside the air preheater, and the NOx in the smoke can be combusted again by mixing the smoke with newly added air, thereby not only effectively reducing the content of NOx in the exhaust gas, but also effectively preventing the resource waste caused by the phenomenon of overtemperature at the top, further, the reburning of NOx can effectively reduce the use of fuel.

Description

Heating furnace system with efficient combustion and low-nitrogen smoke emission

Technical Field

The utility model belongs to the technical field of the heating furnace technique and specifically relates to a heating furnace system with high-efficient burning and low nitrogen fume emission is related to.

Background

With the progress of low NOx emission, although the NOx emission of the heating furnace reaches the standard, the phenomena of excessive fuel consumption and reduced efficiency of the heating furnace can occur, the traditional low-nitrogen burner depends on the technologies of fuel classification, air classification, flame division and the like, although most of the heating furnaces basically reach the emission standard, the problems of excessive fuel consumption and reduced efficiency of the heating furnace exist, the temperature of the flame is low, the flame is too long, even the tail combustion phenomenon occurs, the temperature of a radiation chamber is not uniform, the top is over-temperature and the like, and the heating of the heating furnace is insufficient, the capacity is reduced, and the efficiency is reduced.

Disclosure of Invention

In order to overcome not enough in the background art, the utility model discloses a heating furnace system with high-efficient burning and low nitrogen fume emission, the utility model discloses an install flue gas backflow pipeline and mix with the air of adding in position department of difference to carry out burning once more, the content of NOx in not only can effectual reduction flue gas, moreover can effectual reduction fuel's consumption.

In order to realize the utility model aims at, the utility model adopts the following technical scheme:

the utility model provides a heating furnace system with high-efficient burning and low-nitrogen gas fume emission, includes radiation chamber and fan, high-efficient combustor is installed to the bottom of radiation chamber, the top of radiation chamber is provided with convection chamber, the top of convection chamber is provided with air heater, air heater's top is provided with the chimney, the air outlet of fan is connected with the cold air duct pipeline, high-efficient combustor is connected with the hot air duct pipeline, the connection setting of cold air duct pipeline and hot air duct pipeline, the handing-over position department of cold air duct pipeline and hot air duct pipeline sets up the inside at air heater.

The side of chimney is connected with the flue gas return line, flue gas return line and cold wind channel pipeline intercommunication setting.

The side of the chimney is connected with a flue gas backflow pipeline, and the flue gas backflow pipeline is communicated with a hot air duct pipeline.

The side of convection chamber is connected with flue gas return line, flue gas return line and hot-blast main pipeline intercommunication set up.

And heat exchange pipelines are arranged in the radiation chamber and the convection chamber.

Since the technical scheme is used, the utility model discloses following beneficial effect has:

a heating furnace system with high-efficient burning and low nitrogen fume emission, through mixing the air of flue gas and new joining, make NOx in the flue gas can by burning once more from this, NOx's content in not only can effectual reduction exhaust gas can effectually prevent moreover that the resource waste that the overtemperature condition phenomenon caused from appearing in the top, moreover NOx's burning once more can effectual reduction fuel's use.

Drawings

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

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 3 is a schematic structural diagram of embodiment 3 of the present invention;

1. a high efficiency burner; 2. a radiation chamber; 3. a convection chamber; 4. an air preheater; 5. a chimney; 6. a flue gas return line; 7. a cold air duct line; 8. a hot air duct line; 9. a fan.

Detailed Description

The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.

Embodiment 1, with reference to fig. 1, a heating furnace system with efficient combustion and low-nitrogen flue gas emission comprises a radiation chamber 2 and a fan 9, an efficient burner 1 is installed at the bottom end of the radiation chamber 2, a convection chamber 3 is installed at the top end of the radiation chamber 2, an air preheater 4 is installed at the top end of the convection chamber 3, a chimney 5 is installed at the top end of the air preheater 4, an air outlet of the fan 9 is connected with a cold air duct pipeline 7, the efficient burner 1 is connected with a hot air duct pipeline 8, the cold air duct pipeline 7 and the hot air duct pipeline 8 are connected, a connection position of the cold air duct pipeline 7 and the hot air duct pipeline 8 is arranged inside the air preheater 4, new air added into the efficient burner 1 is heated by the air preheater 4, so that air in the efficient burner 1 can rapidly react with a combustion object, thereby accelerating the reaction speed, the heat efficiency is improved, the side surface of the chimney 5 is connected with a flue gas return pipeline 6, the flue gas return pipeline 6 is communicated with a cold air pipeline 7, and the flue gas and the cold air are mixed, so that the cold air can be preheated before preheating, the flue gas of the flue gas in the chimney 5 can be recycled, the utilization rate of preheating is improved, heat exchange pipelines are arranged inside the radiation chamber 2 and the convection chamber 3, a user can conveniently carry out heat exchange operation, the high-efficiency combustor 1 is adopted, the radiation capacity of the radiation chamber is improved, the principle is that the high-speed flue gas flow velocity is adopted, the airflow circulation of the radiation chamber is increased, the flue gas is repeatedly heated, the temperature of a high temperature point of the radiation chamber is powerfully reduced, the low-temperature of the radiation chamber is improved, the radiation intensity of the radiation chamber is increased, the smoke exhaust temperature is reduced, the efficiency of the combustor is improved, and the high-efficiency combustor is also adopted for flame division and then is concentrated, the method is unfavorable for low NOx emission of combustion, NOx emission of the efficient combustor is always 30-60 mg per cubic meter, the NOx emission is changed due to operation stability and different operation conditions, and the NOx emission of combustion is less than 50 mg per cubic meter in some regions, so that the regional environment-friendly requirement cannot be completely met only by adopting the efficient combustor, the oxygen fraction of combustion-supporting air of the efficient combustor is reduced, the combustion intensity and the flame temperature are reduced, the NOx emission of the efficient combustor is effectively reduced, the flame speed and the flue gas reflux intensity are increased at the same time by utilizing an FGR flue gas recirculation technology of the efficient combustor, the temperature of a radiation chamber is more uniform, the radiation intensity is higher, the radiation quantity is increased, the flue gas temperature at the outlet of the radiation chamber is reduced, the convection type heat transfer capacity is improved due to the increase of the flue gas flow velocity, the flue gas temperature is reduced, and the efficiency of the heating furnace is improved, the proportion of the flue gas to the air is 10-30%, the nitride is reduced by 30-40%, the outlet temperature of the heating furnace is 10-20 ℃, and the efficiency of the heating furnace is improved by about 1% at least.

Embodiment 2, with reference to fig. 2, a heating furnace system with efficient combustion and low-nitrogen flue gas emission comprises a radiation chamber 2 and a fan 9, an efficient burner 1 is installed at the bottom end of the radiation chamber 2, a convection chamber 3 is installed at the top end of the radiation chamber 2, an air preheater 4 is installed at the top end of the convection chamber 3, a chimney 5 is installed at the top end of the air preheater 4, an air outlet of the fan 9 is connected with a cold air duct pipeline 7, the efficient burner 1 is connected with a hot air duct pipeline 8, the cold air duct pipeline 7 and the hot air duct pipeline 8 are connected, a connection position of the cold air duct pipeline 7 and the hot air duct pipeline 8 is arranged inside the air preheater 4, new air added into the efficient burner 1 is heated by the air preheater 4, so that air in the efficient burner 1 can rapidly react with a combustion object, thereby accelerating the reaction speed, the thermal efficiency is improved, the side of chimney 5 is connected with flue gas return pipe 6, flue gas return pipe 6 sets up with 8 intercommunications of hot-blast main pipeline, leading-in to the inside of hot-blast main pipeline 8 to the flue gas in chimney 5, make the low temperature flue gas can higher fresh air mix, thereby can carry out preliminary reaction operation, then enter into the inside of high-efficient combustor 1 simultaneously, the heat transfer pipeline is all installed to the inside of radiation chamber 2 and convection chamber 3, convenient to use person carries out the heat transfer operation.

Embodiment 3, with reference to fig. 3, a heating furnace system with efficient combustion and low-nitrogen flue gas emission comprises a radiation chamber 2 and a fan 9, an efficient burner 1 is installed at the bottom end of the radiation chamber 2, a convection chamber 3 is installed at the top end of the radiation chamber 2, an air preheater 4 is installed at the top end of the convection chamber 3, a chimney 5 is installed at the top end of the air preheater 4, an air outlet of the fan 9 is connected with a cold air duct pipeline 7, the efficient burner 1 is connected with a hot air duct pipeline 8, the cold air duct pipeline 7 and the hot air duct pipeline 8 are connected, a connection position of the cold air duct pipeline 7 and the hot air duct pipeline 8 is arranged inside the air preheater 4, new air added into the efficient burner 1 is heated by the air preheater 4, so that air in the efficient burner 1 can rapidly react with a combustion object, thereby accelerating the reaction speed, the thermal efficiency is improved, the side of convection current room 3 is connected with flue gas return pipe 6, flue gas return pipe 6 sets up with 8 intercommunications of hot-blast main pipeline, high temperature flue gas through in the convection current room 3 to the higher temperature mixes with the inside high-temperature air of hot-blast main pipeline 8, make rising once more of the temperature of new air, make and enter into 1 inside air temperature of high-efficient combustor higher, be convenient for go on fast of burning, heat transfer pipeline is all installed to the inside of radiation chamber 2 and convection current room 3, convenient to use person carries out the heat transfer operation.

The invention is not described in detail in the prior art, and although the invention has been specifically shown and described in connection with the preferred embodiments, the method and the way of implementing the technical solution are numerous, and only the preferred embodiments of the invention have been described above, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims, which are within the scope of the invention.

Claims

1. The utility model provides a heating furnace system with high-efficient burning and low nitrogen fume emission, includes radiation chamber (2) and fan (9), characterized by: efficient burner (1) is installed to the bottom of radiation chamber (2), the top of radiation chamber (2) is provided with convection chamber (3), the top of convection chamber (3) is provided with air heater (4), the top of air heater (4) is provided with chimney (5), the air outlet of fan (9) is connected with cold air duct pipeline (7), efficient burner (1) is connected with hot air duct pipeline (8), the connection setting of cold air duct pipeline (7) and hot air duct pipeline (8), handing-over position department of cold air duct pipeline (7) and hot air duct pipeline (8) sets up the inside at air heater (4).

2. The furnace system of claim 1, wherein the furnace system has high combustion efficiency and low nitrogen flue gas emission, and is characterized in that: the side of chimney (5) is connected with flue gas return pipe (6), flue gas return pipe (6) and cold air duct pipeline (7) intercommunication set up.

3. The furnace system of claim 1, wherein the furnace system has high combustion efficiency and low nitrogen flue gas emission, and is characterized in that: the side of the chimney (5) is connected with a flue gas backflow pipeline (6), and the flue gas backflow pipeline (6) is communicated with a hot air duct pipeline (8).

4. The furnace system of claim 1, wherein the furnace system has high combustion efficiency and low nitrogen flue gas emission, and is characterized in that: the side of the convection chamber (3) is connected with a flue gas return pipe (6), and the flue gas return pipe (6) is communicated with a hot air duct pipeline (8).

5. The furnace system of claim 1, wherein the furnace system has high combustion efficiency and low nitrogen flue gas emission, and is characterized in that: and heat exchange pipelines are arranged in the radiation chamber (2) and the convection chamber (3).