CN116182160B - Intelligent low-nitrogen staged combustor based on data monitoring and control system thereof - Google Patents
Intelligent low-nitrogen staged combustor based on data monitoring and control system thereof Download PDFInfo
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- CN116182160B CN116182160B CN202310167795.4A CN202310167795A CN116182160B CN 116182160 B CN116182160 B CN 116182160B CN 202310167795 A CN202310167795 A CN 202310167795A CN 116182160 B CN116182160 B CN 116182160B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses an intelligent low-nitrogen staged combustor based on data monitoring and a control system thereof, which comprise a first shell and a second shell, wherein a main gas channel is arranged at the top of the first shell in a penetrating way, a mixing cylinder is arranged between the first shell and the second shell in an inscription way, the main gas channel penetrates through the bottom of the mixing cylinder and is connected with the second shell, and an air pipeline is communicated with the outer side of the mixing cylinder; a first ball valve is arranged in the main gas channel in a matched manner, and a second ball valve is arranged in the air pipeline in a matched manner; the first ball valve and the second ball valve are respectively connected with a controller; a preheating pipeline is arranged at the interlayer between the outside of the mixing cylinder and the first shell and the second shell; a smoke chamber is arranged in the first shell, an ignition chamber is arranged in the second shell, and a preheating pipeline is used for communicating the ignition chamber with the smoke chamber; the invention ensures that the burner burns more fully under the condition of low nitrogen oxides.
Description
Technical Field
The invention relates to the technical field of combustors, in particular to an intelligent low-nitrogen staged combustor based on data monitoring and a control system thereof.
Background
Nitrogen oxides widely exist in industrial exhaust, are one of the main industrial pollutants which cause environmental pollution sources such as acid rain, haze and the like and threaten the health of the national body, and in order to reduce the emission of the nitrogen oxides, the national reformulates the emission standards of industrial boilers, burners and the like, improves the emission standards of combustion gas, and meets the environmental protection requirement of the gas emission of the burners by using an economic and effective method.
The existing low-nitrogen combustion technologies generally adopt the technologies of thick and thin combustion, staged combustion, premixed combustion, flameless combustion, chemical looping combustion, flue gas recirculation, porous medium combustion and the like as the basis, the staged combustion is generally to stage the combustion condition of the gas of the mixed gas, and form thick and thin flames with relatively low temperature through corresponding channels, so that the content of the generated nitrogen oxides is reduced to a certain extent, the nitrogen content is reduced to realize the requirement of environmental protection, but the staged combustion in the staged combustion generally reduces the combustion degree of the flames and cannot realize stable combustion.
The combustion mode of the premixing mode can greatly reduce carrier damage caused by high-temperature combustion and emission of nitrogen oxides caused by local high temperature, but the existing premixing mode is easy to cause risks such as explosion and potential safety hazards.
Disclosure of Invention
The invention aims to provide an intelligent low-nitrogen staged combustor based on data monitoring and a control system thereof, which solve the following technical problems:
(1) How to ensure the emission of nitrogen oxides in the burner and ensure the long-term stable operation of the burner;
(2) How to adjust the air inflow of the burner according to the smoke generation condition, so as to ensure more sufficient fuel combustion.
The aim of the invention can be achieved by the following technical scheme:
the intelligent low-nitrogen staged combustor based on data monitoring comprises a first shell and a second shell, wherein a main gas channel is arranged at the top of the first shell in a penetrating manner, a mixing cylinder is arranged between the first shell and the second shell in an inscribing manner, the main gas channel penetrates through the bottom of the mixing cylinder and is connected with the second shell, and an air pipeline is communicated with the outer side of the mixing cylinder; the main gas channel is internally provided with a first ball valve in a matching way, and the air pipeline is internally provided with a second ball valve in a matching way;
the first ball valve and the second ball valve are respectively connected with a controller;
a preheating pipeline is arranged at the interlayer between the outside of the mixing cylinder and the first shell and the second shell; the first shell is internally provided with a smoke chamber, the second shell is internally provided with an ignition chamber, and the preheating pipeline is used for communicating the ignition chamber with the smoke chamber.
Preferably, one side of the first shell is communicated with the smoke chamber, a smoke detector is arranged at the top of the inner side of the smoke chamber, close to the smoke chamber, and is used for detecting smoke parameters and transmitting the smoke parameters to a central control unit, and the central control unit is used for analyzing the smoke parameters and sending control instructions.
Preferably, according to the opening degree of the first ball valve and the second ball valve, from large to small, the following steps are set: first gear, second gear and third gear.
A control system of an intelligent low-nitrogen staged combustor based on data monitoring comprises the following specific operation steps:
step one, acquiring smoke parameters in the smoke detector, wherein the smoke parameters comprise: historical smoke concentration parameter C smo A smoke temperature parameter T, through the formula Calculating control coefficient K, C smo (t) is the dynamic smoke concentration interval, delta, epsilon is the dynamic coefficient, delta t=t 2 -t 1 Wherein Δt is a preset time period, t 2 T is the current time 1 A historical change time deduced from the current time;
step two, the control coefficient K and a preset threshold interval [ K ] 1 ,K 2 ]Performing comparison, wherein 0 is less than K 1 ＜K 2 ：
If K is E [ K 1 ,K 2 ]A synchronous control instruction is sent out, and the first ball valve and the second ball valve are adjusted to a first gear;
if K>K 2 Sending out an asynchronous control instruction, adjusting the first ball valve to a third gear, and adjusting the second ball valve to a second gear;
if K<K 1 And sending out an asynchronous control instruction, adjusting the first ball valve to the second gear, and adjusting the second ball valve to the third gear.
Preferably, the burner is further provided with a temperature detector for detecting the surface temperature of the burner housing, and judging the use state of the burner according to the surface temperature of the burner housing and the smoke concentration.
Preferably, by the formulaCalculating state coefficients L, T out (t) is the dynamic temperature of the surface of the burner housing, a 1 、a 2 、a 3 Is a dynamic coefficient; wherein C is smo For smoke concentration, C th Is the standard smoke concentration, t is the continuous monitoring time, t mo Is a standard monitoring time;
comparing the state coefficient L with the standard state coefficient, if the state coefficient L is larger than the standard state coefficient, judging that the burner is overloaded to operate, and suspending the current working state; if the state coefficient L is smaller than the standard state coefficient, judging that the burner works normally, and continuing the current working state.
Preferably, the ignition chamber is communicated with the bottom of the mixing cylinder, a secondary gas channel is opened on the surface of the main gas channel close to the smoke chamber, the secondary gas channel is communicated with the bottom of the mixing cylinder, and the secondary gas channel is distributed on the periphery of the main gas channel in a vertical circumference manner.
Preferably, the bottom of the main gas channel comprises a drainage channel, a channel opening is formed in the upper end, close to the drainage channel, of the main gas channel, and the channel opening is sequentially increased from top to bottom.
Preferably, the ignition chamber is in communication with a diverter disc comprising a swirl plate.
Preferably, the ignition chamber is internally provided with holes in a circumferentially distributed manner, and the sizes of the holes sequentially decrease from the center of the ignition chamber to the outside.
The invention has the beneficial effects that:
(1) According to the invention, the connecting pipelines are arranged in the first shell and the second shell, so that the fuel and the air in the burner are distributed, the low emission of nitrogen oxides is ensured, the stable operation of the burner is ensured, the main gas channel is arranged, the secondary gas channel is arranged on the main gas channel, the mixing cylinder is arranged, the air is communicated and entered through the air pipeline, the overlapping part of the main gas channel and the air pipeline is perforated, the first mixing of the fuel and the air is ensured, and the combustion treatment at the bottom of the pipeline is facilitated.
(2) According to the invention, the control valve is arranged in the main gas channel and the air pipeline, and particularly the first ball valve and the second ball valve are arranged, so that the control of the air inflow of the gas and the air in the pipeline is ensured, in the embodiment, the preheating pipeline is arranged at the interlayer of the first shell and the second shell, the flue gas is mainly transmitted in the preheating pipeline, the flue gas is conveyed into the smoke chamber, the preheating pipeline is used for carrying out the preheating treatment on the air entering from the rear, and the air and the gas are conveniently and fully mixed under the condition of low temperature.
(3) According to the invention, the first ball valve and the second ball valve are controlled to rotate by the controller, the data programming operation of the smoke concentration and the temperature parameter detected by the smoke detector in the smoke chamber is realized, the smoke detector is guaranteed to detect the relevant data of the smoke, the data is transmitted to the control center, the controller is started to receive and execute the control command, the relative opening sizes of the first ball valve and the second ball valve are further subjected to gear adjustment by calculating the control coefficient formula, and the requirement of controlling the gas flow rate and simultaneously achieving the hierarchical control of the gas and the air is guaranteed.
(4) The invention is provided with the temperature detector, the temperature detector is used for detecting the surface temperature of the burner shell, judging the service state of the burner according to the surface temperature of the burner shell and the smoke concentration, further pushing out the service life of the burner by detecting the service state of the burner in the continuous working time, specifically judging whether the burner is in overload operation or not by calculating the state coefficient, adjusting the current working state, judging to pause the operation or continue the operation by the state coefficient, and ensuring the service life of the burner so as to avoid the risk of leakage.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a low nitrogen staged combustor in accordance with the present invention;
FIG. 2 is a schematic diagram showing the internal structure distribution of a low-nitrogen staged combustor according to the present invention;
FIG. 3 is a schematic diagram of the structure of the control valve in the air duct and the main gas duct according to the present invention;
FIG. 4 is a schematic plan view of a swirl plate according to the present invention;
FIG. 5 is a schematic plan view of an ignition chamber of the present invention;
FIG. 6 is a schematic flow chart of the control system of the intelligent low-nitrogen staged combustor based on data monitoring of the present invention.
Reference numerals: 1. a first housing; 2. a second housing; 3. a main gas passage; 31. a drainage channel; 32. a channel is perforated; 4. a mixing cylinder; 5. an air duct; 6. a controller; 7. a first ball valve; 8. a second ball valve; 9. preheating a pipeline; 10. a smoke chamber; 11. an ignition chamber; 111. opening holes; 12. a secondary gas channel; 13. a diverter tray; 131. swirl plates; 14. a smoke vent; 15. a smoke detector.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, in a specific embodiment, a connecting pipeline is arranged in a first shell 1 and a second shell 2 to ensure that fuel and air in the combustor are split, low emission of nitrogen oxides and stable operation of the combustor are ensured, a main gas channel 3 is arranged to penetrate through the first shell 1, a mixing cylinder 4 is arranged between the first shell 1 and the second shell 2 in an inscribing manner, the mixing cylinder 4 is of a cavity structure, the main gas channel 3 penetrates through the mixing cylinder 4, the bottom of the mixing cylinder 4 is connected with the second shell 2, the mixing cylinder 4 is used for mixing air with fuel in the main gas channel 3 for the first time through an air pipeline 5, and in a specific embodiment, a first ball valve 7 and a second ball valve 8 are respectively connected with a controller 6, and the controller 6 is used for controlling the rotation of the ball valves and the superposition area of the channels and ensuring the controlled fuel and air intake.
By arranging the preheating pipeline 9 at the interlayer between the outside of the mixing cylinder 4 and the first shell 1 and the second shell 2, the preheating pipeline 9 is used for communicating the smoke chamber 10 with the ignition chamber 11 and transporting high-temperature smoke generated by the combustion of the ignition chamber 11 into the smoke chamber 10, and the high-temperature smoke flowing in the preheating pipeline 9 carries out preheating treatment on the air in the air pipeline 5 so as to ensure that the preheated air and the fuel gas are fully mixed.
As an embodiment of the present invention, please refer to fig. 2 of the drawings, specifically, a first ball valve 7 and a second ball valve 8 are disposed in the air pipeline 5 and the main gas channel 3, two ball valves are disposed in cooperation with ball cavities, the ball cavities are disposed in the main gas channel 3 and the air pipeline 5 in cooperation, the ball valves rotate under the action of driving force, the ball valves are connected to the controller 6 through a rotating rod, the controller 6 is restricted to rotate, the controller 6 is guaranteed to drive the driving motor to rotate the two ball valves, thereby adjusting the amount of gas in the air pipeline 5 and the main gas channel 3, and flexible adjustment is guaranteed by adjusting the amount of air inflow according to the fuel combustion condition.
As an embodiment of the present invention, referring to fig. 1-3 of the drawings, specifically, one side of the first housing 1 is communicated with the smoke chamber 10, a smoke port 14 is formed in the inner top of the smoke chamber 10 near the port, a smoke detector 15 is disposed in the smoke chamber, and the smoke detector 15 is used for detecting smoke concentration parameters and transmitting the smoke concentration parameters to the central control unit. The first rotating shaft passes through the outer side of the first shell 1 and is connected with a controller 6, and the controller 6 is used for receiving and executing control instructions.
As an embodiment of the present invention, please refer to fig. 2-3 of the accompanying drawings, specifically, according to the overlapping areas of the openings of the first ball valve 7 and the second ball valve 8 with the main gas channel 3 and the air channel 5, the gear positions are set in sequence from large to small: the higher the gear is, the smaller the overlapping area is.
As an embodiment of the present invention, please refer to fig. 6 of the accompanying drawings, a control system for an intelligent low-nitrogen staged burner based on data monitoring is provided, and specific operation steps of control instructions are as follows:
step one, acquiring smoke parameters in the smoke detector 15, wherein the smoke parameters include: historical smoke concentration parameter C smo A smoke temperature parameter T, through the formula Calculating control coefficient K, C smo (t) is a dynamic smoke concentration interval, delta and epsilon are dynamic coefficients;
step two, the control coefficient K and a preset threshold interval [ K ] 1 ,K 2 ]Performing comparison, wherein 0 is less than K 1 ＜K 2 ：
If K is E [ K 1 ,K 2 ]A synchronous control instruction is sent out, and the first ball valve 7 and the second ball valve 8 are adjusted to a first gear;
if K>K 2 Sending out an asynchronous control instruction, adjusting the first ball-type 7 valve to a third gear, and adjusting the second ball-type 8 valve to a second gear;
if K<K 1 And sending out an asynchronous control instruction, adjusting the first ball-type 7 valve to the second gear, and adjusting the second ball-type 8 valve to the third gear.
Obtaining dynamic coefficient delta, delta t=t according to mixing proportion of air and fuel gas 2 -t 1 Wherein Δt is a preset time period, and the time period is obtained by accumulation according to historical experience, t 2 T is the current time 1 Is a historical change time derived from the current time.
Through the technical scheme: the historical smoke concentration parameter and smoke temperature parameter in the smoke chamber 10 are detected by the smoke detector 15, the data are analyzed by the central control unit to obtain a control instruction, the controller 6 is controlled to rotate and shift, the air inflow is regulated and controlled by regulating the opening sizes of the first ball valve 7 and the second ball valve 8, the air inflow of fuel gas and air is simultaneously regulated and independently regulated, layering treatment of the air inflow is ensured, stable combustion of the burner is judged according to smoke is ensured, and the formula is adoptedCalculating control coefficient K, C smo (t) is a dynamic smoke concentration interval, delta and epsilon are dynamic coefficients obtained by mixing proportion of air and fuel gas; then the control coefficient K is combined with a preset threshold interval [ K ] 1 ,K 2 ]And comparing the sizes, sending out synchronous control and asynchronous control instructions, and ensuring the adjustment of the overlapping area of the spherical valve opening of the corresponding channel and the channel, thereby changing the gas flow rate and carrying out hierarchical control on the gas and the air.
It should be noted that, the dynamic coefficients δ and e in the above technical solution are selectively set according to experimental data of mixing proportions of different air and gas, and the preset threshold interval in the above solution is selectively set according to historical data, which is not described herein.
As one embodiment of the invention, the burner is further provided with a temperature detector for detecting the surface temperature of the burner shell, and judging the using state of the burner according to the surface temperature of the burner shell and the smoke concentration.
Through the technical scheme: the invention relates to a method for ensuring the safe use of a burner, which is an important precondition for ensuring the energy provided by fuel combustion, but because most of the burner ensures the full combustion of fuel under the high temperature condition, the service life of the used burner is limited, the service life of the burner is prolonged, the service state of the burner is protected, whether the inner and outer states of the burner reach a critical value or not is usually detected by detecting the temperature of a shell of the burner, the concentration of combustion smoke and the continuous combustion time are detected internally, and if the surface temperature of the burner is not detected timely by arranging a temperature detector, the continuous service life of the burner is influenced.
In one embodiment of the invention, in particular, the method is represented by the formula Calculating state coefficients L, T out (t) is the dynamic temperature of the surface of the burner housing, a 1 、a 2 、a 3 Is a dynamic coefficient; wherein C is smo For smoke concentration, C th Is the standard smoke concentration, t is the continuous monitoring time, t mo Is a standard monitoring time;
comparing the state coefficient L with the standard state coefficient, if the state coefficient L is larger than the standard state coefficient, judging that the burner is overloaded to operate, and suspending the current working state; if the state coefficient L is smaller than the standard state coefficient, judging that the burner works normally, and continuing the current working state.
Through the technical scheme: detecting a burner by a temperature detectorMeter case temperature, detecting average value of accumulated area of corresponding burner meter case temperature in combustion duration range, and detecting corresponding smoke concentration value C smo Specific calculation of state coefficient formula based on the ratio of standard smoke concentration By calculating state coefficients L, T out (t) is the dynamic temperature of the surface of the burner housing, a 1 、a 2 、a 3 Is a dynamic coefficient; wherein C is smo For smoke concentration, C th Is the standard smoke concentration, t is the continuous monitoring time, t mo For a standard monitoring time, wherein the standard smoke concentration is obtained from historical empirical data and the dynamic coefficient a 1 、a 2 、a 3 The scaling factor of the corresponding detection data is also obtained by detecting according to historical experience, and will not be described herein.
According to the scheme, the state coefficient L is compared with the standard state coefficient to obtain the state coefficient condition in the detection time period, the current use condition of the burner shell is judged according to the state coefficient condition, further operation is carried out, and the normal operation of the burner is ensured; the analysis process comprises judging that the burner is overloaded to run and suspending the current working state if the state coefficient L is larger than the standard state coefficient; if the state coefficient L is smaller than the standard state coefficient, judging that the burner works normally, continuing the current working state, in the embodiment, working out the service life of the burner by detecting the service condition of the burner in the continuous working time, judging to stop working or continue to operate through the state coefficient, and guaranteeing to prolong the service life of the burner so as to avoid the risk of leakage.
In one embodiment of the present invention, please refer to fig. 2 and 5 of the drawings, specifically, the ignition chamber 11 is communicated with the mixing cylinder 4 to ensure that premixed gas is fully combusted in the ignition chamber 11, the primary gas channel 3 is provided with a secondary gas channel 12 above the first adjusting valve, the gas is transported downwards to above the combustion disc through the secondary gas channel 12 and is mixed with the gas in the mixing cylinder to ensure third premixing of the gas, a lighting device is arranged in the ignition chamber to ensure that the mixed gas is fully ignited, the premixed gas is ignited in the ignition chamber 11 to ensure safe and stable combustion of flame.
In an embodiment of the present invention, please refer to fig. 1-2 of the accompanying drawings, specifically, the drainage channel 31 ensures directional drainage of the fuel gas in the main fuel gas channel 3, meanwhile, a channel opening 32 is provided at the upper end of the drainage channel 31, so as to ensure premixing with the air in the mixing cylinder 4, and meanwhile, the rest fuel gas and a small amount of air in the main fuel gas channel 3 are mixed through the drainage channel 31 to reach the ignition chamber 11 for combustion, so as to ensure secondary mixed combustion, ensure full utilization of the fuel of the previous time through mixed combustion, and the mixed oxygen has good content, so that the overall combustion effect is ensured to be more sufficient.
As an embodiment of the present invention, please refer to fig. 1-2 and fig. 4 of the accompanying drawings, specifically, a splitter plate 13 is opened at the bottom of the ignition chamber 11, and a plurality of swirl plates 131 are disposed in the splitter plate 13 and are circumferentially distributed, so that the flame in the ignition chamber 11 is conveniently conducted, the flame is ensured to be uniformly dispersed, and the heated object is conveniently and uniformly heated.
In one embodiment of the present invention, referring to fig. 5 of the drawings, openings 111 are distributed on the inner circumference of the ignition chamber 11, the pore size of the openings 111 decreases from the center of the ignition chamber 11 to the outside, the middle opening 111 is largest, the combustion of the fuel gas in the main fuel gas channel 3 is ensured under a more sufficient aerobic environment, and the stratified combustion of the fuel gas is ensured as the size of the mixed gas decreases step by step, so that a more sufficient condition for combustion is provided.
The working principle of the invention is as follows: the invention ensures that the fuel and the air in the burner are split by arranging the connecting pipelines in the first shell 1 and the second shell 2, ensures the low emission of nitrogen oxides and ensures the stable operation of the burner, and simultaneously sets the mixing by arranging the main gas channel 3, the secondary gas channel 12 on the main gas channel 3 and the mixing by arranging the main gas channel 3The cylinder body 4 is communicated with inlet air through the air pipeline 5, and a channel opening 32 is formed at the overlapping part of the main gas channel 3 and the air pipeline 5, so that the gas and the air are ensured to be mixed for the first time, and the combustion treatment is conveniently carried out at the bottom of the pipeline; the control valves are arranged in the main gas channel 3 and the air pipeline 5, and particularly the first ball valve 7 and the second ball valve 8 are arranged to control the air inflow of the gas and the air input into the pipeline, in the embodiment, the preheating pipeline 9 is arranged at the interlayer of the first shell 1 and the second shell 2, the combustion waste gas is mainly transmitted in the preheating pipeline 9, the flue gas is transmitted into the smoke chamber 10, the air entering from the rear is preheated in the transportation process of the preheating pipeline 9, and the air and the gas are conveniently and fully mixed under the condition of low temperature; according to the invention, the controller 6 is arranged to control the first ball valve 7 and the second ball valve to rotate, and the data programming operation of the smoke concentration and the temperature parameter detected by the smoke detector 15 in the smoke chamber 10 ensures that the smoke detector 15 detects the relevant data of the smoke, the relevant data is transmitted to the control center and the controller 6 is started to receive and execute the control command, so that the relative opening sizes of the first ball valve 7 and the second ball valve 8 are subjected to gear adjustment, and the requirement of controlling the gas flow rate and simultaneously achieving the hierarchical control of gas and air is ensured; judging the stable combustion state of the burner through smoke, and calculating a control coefficient K and a preset threshold interval [ K ] through a formula 1 ,K 2 ]Comparing the sizes, sending out synchronous control and asynchronous control instructions, and ensuring the adjustment of the overlapping area of the spherical valve opening of the corresponding channel and the channel, thereby changing the gas flow rate and carrying out hierarchical control on the gas and the air; detecting whether the temperature of the shell of the burner reaches a critical value or not, detecting the concentration of combustion smoke and the continuous combustion time in the interior, comparing the state coefficient L with the standard state coefficient to obtain the state coefficient condition in the detection time period, judging the overload operation of the burner, suspending the current working state or judging the normal operation of the burner, continuing the current working state, judging the current use condition of the shell of the burner according to the state coefficient condition, ensuring the normal operation of the burner, and detecting the use condition of the burner in the continuous operation timeAnd the service life of the burner is calculated, and the operation is stopped or continued through state coefficient judgment, so that the service life of the burner is ensured to be prolonged, and the risk of leakage is avoided.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (6)
1. The intelligent low-nitrogen staged combustor based on data monitoring is characterized by comprising a first shell (1) and a second shell (2), wherein a main gas channel (3) is penetrated and arranged at the top of the first shell (1), a mixing cylinder (4) is internally connected between the first shell (1) and the second shell (2), the main gas channel (3) penetrates through the bottom of the mixing cylinder (4) and is connected with the second shell (2), and an air pipeline (5) is communicated with the outer side of the mixing cylinder (4); a first ball valve (7) is arranged in the main gas channel (3) in a matched mode, and a second ball valve (8) is arranged in the air pipeline (5) in a matched mode;
the first ball valve (7) and the second ball valve (8) are respectively connected with a controller (6);
a preheating pipeline (9) is arranged at the interlayer between the outside of the mixing cylinder (4) and the first shell (1) and the second shell (2); a smoke chamber (10) is arranged in the first shell (1), an ignition chamber (11) is arranged in the second shell (2), and the preheating pipeline (9) is used for communicating the ignition chamber (11) with the smoke chamber (10);
a smoke through hole (14) is formed in one side of the first shell (1) and the smoke chamber (10) in a communicating manner, a smoke detector (15) is arranged at the top of the inner side of the smoke chamber (10) and close to the through hole, the smoke detector (15) is used for detecting smoke parameters and transmitting the smoke parameters to a central control unit, and the central control unit is used for analyzing the smoke parameters and sending control instructions;
according to the opening degree of the first ball valve (7) and the second ball valve (8), the following steps are sequentially arranged from big to small: first gear, second gear and third gear;
the specific operation steps of the control instruction are as follows:
step one, acquiring smoke parameters in the smoke detector (15), wherein the smoke parameters comprise: historical smoke concentration parameter C smo A smoke temperature parameter T, through the formula Calculating control coefficient K, C smo (t) is the dynamic smoke concentration interval, delta, epsilon is the dynamic coefficient, delta t=t 2 -t 1 Wherein Δt is a preset time period, t 2 T is the current time 1 A historical change time deduced from the current time;
step two, the control coefficient K and a preset threshold interval [ K ] 1 ,K 2 ]Performing comparison, wherein 0 is less than K 1 ＜K 2 ：
If K is E [ K 1 ,K 2 ]A synchronous control instruction is sent out, and the first ball valve (7) and the second ball valve (8) are regulated to a first gear;
if K>K 2 Sending out an asynchronous control instruction, adjusting the first ball valve (7) to a third gear, and adjusting the second ball valve (8) to a second gear;
if K<K 1 Sending out an asynchronous control instruction, adjusting the first ball valve (7) to a second gear, and adjusting the second ball valve (8) to a third gear;
the burner is also provided with a temperature detector, and the temperature detector is used for detecting the surface temperature of the burner shell and judging the using state of the burner according to the surface temperature of the burner shell and the smoke concentration.
2. The intelligent low-nitrogen staged combustor based on data monitoring according to claim 1, wherein the ignition chamber (11) is communicated with the bottom of the mixing cylinder (4), a secondary gas channel (12) is opened on the surface of the main gas channel (3) close to the smoke chamber (10), the secondary gas channel (12) is communicated with the bottom of the mixing cylinder (4), and the secondary gas channels (12) are distributed around the periphery of the main gas channel (3) in a vertical circumference.
3. The intelligent low-nitrogen staged combustor based on data monitoring according to claim 1, wherein the bottom of the main gas channel (3) comprises a drainage channel (31), a channel opening (32) is formed in the upper end, close to the drainage channel (31), of the main gas channel (3), and the channel opening (32) is sequentially increased from top to bottom.
4. An intelligent low-nitrogen staged burner based on data monitoring according to claim 1, wherein the ignition chamber (11) is in communication with a diverter disc (13), the diverter disc (13) comprising swirl vanes (131).
5. The intelligent low-nitrogen staged combustor based on data monitoring as claimed in claim 4, wherein the inner circumference of the ignition chamber (11) is provided with openings (111), and the pore size of the openings (111) is sequentially reduced from the center of the ignition chamber (11) to the outside.
6. A control system for an intelligent low nitrogen staged combustor based on data monitoring as claimed in claim 1, wherein the control system is configured by the formula Calculating state coefficients L, T out (t) is the dynamic temperature of the surface of the burner housing, a 1 、a 2 、a 3 Is a dynamic coefficient; wherein C is smo For smoke concentration, C th Is the standard smoke concentration, t is the continuous monitoring time, t mo Is a standard monitoring time;
comparing the state coefficient L with the standard state coefficient, if the state coefficient L is larger than the standard state coefficient, judging that the burner is overloaded to operate, and suspending the current working state; if the state coefficient L is smaller than the standard state coefficient, judging that the burner works normally, and continuing the current working state.
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| CN2793554Y (en) * | 2005-06-14 | 2006-07-05 | 洛阳豫新冶金设备有限公司 | Self-preheated burner |
| CN106500094A (en) * | 2016-10-19 | 2017-03-15 | 同济大学 | A kind of low nitrogen gradual combustor of high temperature smoke gas circulating type and technique |
| CN109654496A (en) * | 2017-10-12 | 2019-04-19 | 重庆赛迪热工环保工程技术有限公司 | A kind of self-preheating type high combustion rate burner and its control method |
| CN214307102U (en) * | 2020-12-03 | 2021-09-28 | 陕西沃斯莱特机械自动化设备有限公司 | Special dense-dilute combustion low-emission natural gas combustor for asphalt stirring equipment |
| CN113757657A (en) * | 2021-09-26 | 2021-12-07 | 河北和和能源科技有限公司 | Hierarchical self-entrainment low-nitrogen combustor |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793554Y (en) * | 2005-06-14 | 2006-07-05 | 洛阳豫新冶金设备有限公司 | Self-preheated burner |
| CN106500094A (en) * | 2016-10-19 | 2017-03-15 | 同济大学 | A kind of low nitrogen gradual combustor of high temperature smoke gas circulating type and technique |
| CN109654496A (en) * | 2017-10-12 | 2019-04-19 | 重庆赛迪热工环保工程技术有限公司 | A kind of self-preheating type high combustion rate burner and its control method |
| CN214307102U (en) * | 2020-12-03 | 2021-09-28 | 陕西沃斯莱特机械自动化设备有限公司 | Special dense-dilute combustion low-emission natural gas combustor for asphalt stirring equipment |
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