Boiler furnace optimized combustion system

Abstract

The utility model discloses a boiler furnace optimization combustion device which comprises a furnace, a connecting flue, an extending flue and an economizer outlet flue, the connecting flue is located above the furnace, the extending flue is arranged at the other end of the connecting flue, and the rear end of the extending flue is connected with the economizer outlet flue. A first combustor and a second combustor are arranged on the side edges of the hearth respectively, an economizer is arranged on an economizer outlet flue, the other end of the economizer outlet flue is connected with an air preheater, a pipeline of the air preheater is connected with the second combustor, and a smoke exhaust pipe is arranged at the other end of the air preheater. The method has the beneficial effects that after the combustion coal quality of the boiler is changed, proper feedback adjustment parameters can be provided for a unit through measured combustion parameters by utilizing a conventional combustion optimization analysis system, an effective adjustment strategy is provided, and recovery is performed through a subsequent air preheater, so that the utilization efficiency of heat is ensured, and the combustion optimization of the boiler is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler combustion, and specifically, to an optimized combustion system for a boiler furnace. Background Art

[0002] Traditional coal-fired boilers have been developed for nearly two hundred years. Conventional boiler combustion systems usually use a forced draft fan and a coal pulverizer to send the air and pulverized coal required for combustion to the combustion system for combustion. The high-temperature flue gas generated is cooled after passing through the superheater, reheater, economizer, and air preheater, and then is purified through the flue gas pollutant treatment system and discharged into the atmosphere through the induced draft fan and chimney. However, in the burner and local areas of the furnace, uneven powder supply in the primary air pulverized coal pipeline, differences in pulverized coal particle size, or when there is insufficient oxygen, incomplete combustion and an increase in unburned carbon will occur. It is necessary to monitor the combustion process and control the combustion conditions and combustion efficiency in the furnace, and adjust the operation strategy. It is particularly important for improving the coal utilization rate of the boiler and determining the optimal operation adjustment parameters of the unit. Summary of the Utility Model

[0003] In view of the problems in the related art, the utility model proposes an optimized combustion system for a boiler furnace to overcome the above-mentioned technical problems existing in the related art.

[0004] Specifically, the technical solution adopted by the utility model is as follows:

[0005] An optimized combustion system for a boiler furnace includes a furnace, a connecting flue, an extended flue, and an economizer outlet flue. The connecting flue is located above the furnace. The other end of the connecting flue is provided with an extended flue. The rear end of the extended flue is connected to the economizer outlet flue. A burner one and a burner two are respectively arranged on the sides of the furnace. An economizer is arranged on the economizer outlet flue. The other end of the economizer outlet flue is connected to an air preheater. The pipeline of the air preheater is connected to the burner two. The other end of the air preheater is provided with a smoke exhaust pipe.

[0006] Further, the burner one is connected to a distributor through a pipeline. A coal pulverizer is arranged at the bottom of the distributor. The side of the coal pulverizer is connected to a primary air pulverized coal fan.

[0007] Further, a primary air concentration regulating valve is arranged on the pipeline between the burner one and the distributor.

[0008] Further, a dust collector is arranged at the end outlet of the smoke exhaust pipe.

[0009] Further, a superheater and a reheater are successively arranged in the connecting flue. The superheater is located above the furnace. The reheater is located on the side of the superheater.

[0010] Further, the other end of the air preheater is connected to the secondary air fan.

[0011] Further, an oxygen content detection probe, a carbon dioxide monitoring transmitter, and a carbon monoxide monitoring transmitter are sequentially arranged on the outlet side of the outlet flue of the economizer.

[0012] Further, it further includes a computer, and the computer is located in the control room.

[0013] The utility model provides an optimized combustion system for a boiler furnace, and the beneficial effects are as follows: By connecting an oxygen content detection probe, a carbon dioxide monitoring transmitter, a carbon monoxide monitoring transmitter, etc. to a computer, the utility model can monitor the concentrations of carbon monoxide, carbon dioxide, and oxygen content in the flue gas, convert them into electrical signals, and send them into the computer program for combustion control, measure the boiler efficiency in real-time online, judge the current combustion condition of the coal in the boiler furnace. When the coal quality burned by the boiler changes, the measured combustion parameters can be used to provide appropriate feedback adjustment parameters for the unit by means of the previous combustion optimization analysis system, and provide effective adjustment strategies. Through subsequent recovery by the air preheater, the utilization efficiency of heat is ensured, and the optimization of boiler combustion is realized. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic structural diagram of an optimized combustion system for a boiler furnace according to an embodiment of the present utility model.

[0016] In the figure:

[0017] 1. Furnace; 2. Connecting flue; 3. Extended flue; 4. Outlet flue of economizer; 5. Burner 1; 6. Burner 2; 7. Economizer; 8. Air preheater; 9. Exhaust pipe; 10. Distributor; 11. Coal mill; 12. Primary air coal powder fan; 13. Secondary air fan; 14. Superheater; 15. Reheater; 16. Oxygen content detection probe; 17. Carbon dioxide monitoring transmitter; 18. Carbon monoxide monitoring transmitter. Detailed Embodiments

[0018] To further illustrate each embodiment, the present utility model provides attached drawings, which are part of the disclosure of the present utility model. These drawings are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present utility model, an optimized combustion system for a boiler furnace is provided.

[0020] Embodiment 1:

[0021] As Figure 1 shown, the optimized combustion device for a boiler furnace according to an embodiment of the present utility model includes a furnace 1, a connecting flue 2, an extended flue 3, and an economizer outlet flue 4. The connecting flue 2 is located above the furnace 1. The other end of the connecting flue 2 is provided with an extended flue 3. The rear end of the extended flue 3 is connected to an economizer outlet flue 4. Combustion burner one 5 and combustion burner two 6 are respectively arranged on the side edges of the furnace 1. An economizer 7 is arranged on the economizer outlet flue 4. The other end of the economizer outlet flue 4 is connected to an air preheater 8. The pipeline of the air preheater 8 is connected to the combustion burner two 6. The other end of the air preheater 8 is provided with an exhaust pipe 9.

[0022] The combustion burner one 5 is connected to a distributor 10 through a pipeline. A coal mill 11 is arranged at the bottom of the distributor 10. The side of the coal mill 11 is connected to a primary air pulverized coal fan 12. A primary air concentration regulating valve is arranged on the pipeline between the combustion burner one 5 and the distributor 10.

[0023] After the raw coal is crushed and ground by the coal mill 11, the primary air pulverized coal fan 12 sends the air and pulverized coal required for combustion to the combustion burner one 5 through the outlet distributor 10 of the coal mill 11 and enters the furnace 1 area for combustion. The high-temperature flue gas generated by the combustion in the furnace passes through the upper part of the furnace 1, the connecting flue 2, the extended flue 3, and the economizer outlet flue 4, and exchanges heat with the air entering the furnace 1 in the air preheater 8. The hot air is sent by a secondary air fan 13 to the combustion burner two 6 in the furnace 1 and enters the furnace area for combustion again. Through the primary air pulverized coal fan 12 and the secondary air fan 13, combustion is carried out in the furnace 1 area by the combustion burner one 5 and the combustion burner two 6. The temperature of the high-temperature flue gas decreases after passing through the superheater 14, the reheater 15, the economizer 7, the oxygen detection probe 16, the carbon dioxide monitoring transmitter 17, and the air preheater 8. Among them, the flue gas is purified by the induced draft fan and the dust collector to remove dust and then sent to the chimney and discharged into the atmosphere.

[0024] Embodiment 2:

[0025] AsFigure 1 As shown, a dust collector is provided at the end outlet of the exhaust pipe 9.

[0026] A superheater 14 and a reheater 15 are successively arranged in the connecting flue 2. The superheater 14 is located above the furnace 1, and the reheater 15 is located at the side of the superheater 14.

[0027] The other end of the air preheater 8 is connected to the secondary air blower 13. High-temperature flue gas exchanges heat with the air entering the furnace 1 in the air preheater 8. The hot air is sent by the secondary air blower 13 to the burner two 6 in the furnace 1 and enters the furnace area again for combustion.

[0028] An oxygen content detection probe 16, a carbon dioxide monitoring transmitter 17, and a carbon monoxide monitoring transmitter 18 are successively arranged at the outlet side of the outlet of the economizer outlet flue 4. Multiple carbon dioxide monitoring transmitters 17 and carbon monoxide monitoring transmitters 18 can be provided for monitoring. The oxygen content detection probe 16, the carbon dioxide monitoring transmitter 17, and the carbon monoxide monitoring transmitter 18 can all be set to the instantaneous acquisition measurement method or the time-averaged acquisition measurement method. The content of the measured gas components is measured as the average value within a certain period of time by the time-averaged acquisition measurement method. The carbon dioxide monitoring transmitter 17 and the carbon monoxide monitoring transmitter 18 real-time measure the carbon monoxide, carbon dioxide, and oxygen contents at the outlet of the economizer outlet flue.

[0029] It also includes a computer which is located in the control room. The air preheater 8, the oxygen content detection probe 16, the carbon dioxide monitoring transmitter 17, the carbon monoxide monitoring transmitter 18, etc. are connected to the computer, and a combustion optimization analysis system is installed on the computer.

[0030] In actual application, after the raw coal is crushed and ground by the coal mill 11, the primary air coal powder blower 12 sends the air and coal powder required for combustion to the burner one 5 through the outlet distributor 10 of the coal mill 11 and enters the furnace 1 area for combustion. The high-temperature flue gas generated by the combustion in the furnace passes through the upper part of the furnace 1, the connecting flue 2, the extension flue 3, and the economizer outlet flue 4, and exchanges heat with the air entering the furnace 1 in the air preheater 8. The hot air is sent by the secondary air blower 13 to the burner two 6 in the furnace 1 and enters the furnace area again for combustion. Through the primary air coal powder blower 12 and the secondary air blower 13, combustion is carried out in the burner one 5 and the burner two 6 in the furnace 1 area. The temperature of the high-temperature flue gas decreases after passing through the superheater 14, the reheater 15, the economizer 7, the oxygen content detection probe 16, the carbon dioxide monitoring transmitter 17, and the air preheater 8. Among them, the flue gas is purified by the induced draft fan and the dust collector to remove the soot and then sent to the chimney and discharged into the atmosphere.

[0031] Connect to a computer through an oxygen content detection probe 16, a carbon dioxide monitoring transmitter 17, a carbon monoxide monitoring transmitter 18, etc. Collect the detected data through the optimization system in the computer, collect the data required for calculating thermal efficiency and analyzing economic benefits, such as the contents of carbon monoxide, carbon dioxide, and oxygen, judge the combustion status of the unit in real time, analyze the combustion efficiency and economic benefits of the current boiler, combine with the reference of the optimization adjustment plan, feedback the operation adjustment strategy of the current unit to the operation personnel in real time, and after confirmation, it can be adjusted by action.

[0032] In summary, by means of the above technical solutions of the present invention, connecting to a computer through an oxygen content detection probe 16, a carbon dioxide monitoring transmitter 17, a carbon monoxide monitoring transmitter 18, etc., can monitor the concentrations of carbon monoxide, carbon dioxide, and oxygen in the flue gas, convert them into electrical signals, and send them into the computer program for combustion control, measure the boiler efficiency in real time online, and judge the combustion status of the coal in the current boiler furnace. When the coal quality burned by the boiler changes, the appropriate feedback adjustment parameters can be provided for the unit by using the previous combustion optimization analysis system through the measured combustion parameters, and effective adjustment strategies can be provided. Recover through the subsequent air preheater to ensure the utilization efficiency of heat and realize the optimization of boiler combustion.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boiler furnace optimized combustion system, characterized in that, It includes a furnace chamber (1), a connecting flue (2), an extended flue (3) and an economizer outlet flue (4). The connecting flue (2) is located above the furnace chamber (1). An extended flue (3) is provided at the other end of the connecting flue (2). The rear end of the extended flue (3) is connected to the economizer outlet flue (4). A burner one (5) and a burner two (6) are respectively arranged on the side edges of the furnace chamber (1). An economizer (7) is provided on the economizer outlet flue (4). An air preheater (8) is connected to the other end of the economizer outlet flue (4). The pipeline of the air preheater (8) is connected to the burner two (6). A smoke exhaust pipe (9) is provided at the other end of the air preheater (8).

2. The optimized combustion system for a boiler furnace according to claim 1, characterized in that, The burner one (5) is connected to a distributor (10) through a pipeline. A coal mill (11) is provided at the bottom of the distributor (10). The side of the coal mill (11) is connected to a primary air pulverized coal fan (12).

3. The optimized combustion system for a boiler furnace according to claim 2, characterized in that A primary air concentration regulating valve is provided on the pipeline between the burner one (5) and the distributor (10).

4. A boiler furnace optimized combustion system according to claim 1, characterized in that, A dust collector is provided at the end outlet of the smoke exhaust pipe (9).

5. The optimized combustion system for a boiler furnace according to claim 1, wherein A superheater (14) and a reheater (15) are successively arranged in the connecting flue (2). The superheater (14) is located above the furnace chamber (1). The reheater (15) is located on the side of the superheater (14).

6. The optimized combustion system for a boiler furnace according to claim 1, wherein, The other end of the air preheater (8) is connected to a secondary air fan (13).

7. A boiler furnace optimized combustion system according to claim 1, characterized in that, An oxygen content detection probe (16), a carbon dioxide monitoring transmitter (17) and a carbon monoxide monitoring transmitter (18) are successively arranged on the outlet side of the economizer outlet flue (4).

8. The optimized combustion system for a boiler furnace according to claim 1, wherein, It also includes a computer which is located in the control room.

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