CN114738786A - Sectional type gas torch combustion system - Google Patents
Sectional type gas torch combustion system Download PDFInfo
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- CN114738786A CN114738786A CN202210505828.7A CN202210505828A CN114738786A CN 114738786 A CN114738786 A CN 114738786A CN 202210505828 A CN202210505828 A CN 202210505828A CN 114738786 A CN114738786 A CN 114738786A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 74
- 239000007789 gas Substances 0.000 claims abstract description 106
- 238000009826 distribution Methods 0.000 claims abstract description 26
- 239000002737 fuel gas Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003546 flue gas Substances 0.000 abstract description 7
- 230000005855 radiation Effects 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 239000000567 combustion gas Substances 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 34
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
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- 239000003345 natural gas Substances 0.000 description 4
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- 230000000694 effects Effects 0.000 description 3
- 238000000855 fermentation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 239000010865 sewage Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
- F23K5/005—Gaseous fuel from a central source to a plurality of burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
- F23K5/007—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/007—Regulating fuel supply using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a sectional gas torch combustion system, which comprises a gas inlet main pipe connected to a gas distribution pipe, wherein the calibers of all levels of branch gas pipes are determined according to the designed and distributed combustion gas amount of all levels, a staged burner valve group consisting of a manual valve, a pneumatic or electric valve and a flame arrester with corresponding calibers is respectively configured, the combustion gas supply of combustion heads of all corresponding staged burner nozzle pipes which are mutually independent and uniformly distributed in a torch is controlled, and when each staged burner is put into use, the gas is sprayed out from the combustion heads and is ignited by an ignition pilot burner and then combusted. According to the combustion gas volume and the intensity automatically regulated intake, partly and the gas homogeneous mixing of the combustion head spun of equipartition provide required oxygen, surplus part further mixes with the flue gas after the burning and reduces the temperature of exhaust flue gas, reduces the heat radiation influence. The burner can adapt to the large-range change of the gas quantity in a wide flow range by a mode of putting burners at all levels in a grading mode for grading combustion, and the burner can stably, safely and smokeless burn and reach the emission standard.
Description
Technical Field
The invention belongs to the technical field of combustors, and particularly relates to a sectional type gas torch combustion system.
Background
The by-product biogas is generated in various anaerobic fermentation treatment processes of garbage treatment leachate, sewage treatment, livestock and poultry farm manure treatment, bio-pharmaceuticals and the like, the main component of the biogas is methane, and the biogas belongs to greenhouse gas and cannot be directly discharged according to the environmental protection requirement. Biogas generated in the anaerobic treatment process and taking methane as a main component must be combusted by using the heat energy thereof or combusted by a torch and then discharged after reaching the standard; other fuel gases (natural gas, coal gas, liquefied gas and the like) also have the requirement that redundant fuel gases need to be combusted and discharged in an emergency manner in the storage and transportation transfer process; the torch burner is the core equipment for burning and discharging the biogas, natural gas and the like, and simultaneously, according to the requirements of GB/T41191-2021 Marsh gas engineering flame burner, for a closed Marsh gas torch, the burning quantity regulation ratio is required to be not less than 5: under the condition of 1, the biogas torch does not generate open flame phenomenon at the maximum pressure and flow, can stably burn and does not generate tempering phenomenon at the minimum rated pressure, the processing capacity of the biogas torch cannot be less than the peak gas production per hour, and the temperature of the outer surface of the torch is not higher than 60 ℃ of the environmental temperature. This puts higher demands on the biogas burner.
Along with the implementation of energy conservation and emission reduction and carbon neutralization policies of carbon peak, the awareness and requirements of comprehensive utilization of pollutants are continuously improved, the requirements on environmental-protection emission reaching standards are further improved, in recent years, biogas engineering projects are remarkably and vigorously developed, along with the improvement of anaerobic fermentation technology and the optimization of biogas collection technology, the biogas yield is continuously improved, a new step is provided for the requirements on biogas treatment capacity and biogas treatment capacity, the biogas capacity of a torch is continuously expanded from about 50 square small torches to the current torch, and the requirements on torch treatment of more than 1000 square torch and larger torch are continuously met. The novel requirements for the flare combustor are provided, and the combustor is required to have a larger combustion quantity regulation ratio, namely, the flare combustor can stably and safely combust in a larger methane quantity range and discharge the biogas after reaching the standard. The existing torch burner has a narrow application range to gas flow, cannot be well applied to a large-flow gas torch, and has a plurality of problems.
The existing torch burners adopt a one-section combustion mode, namely, except for an ignition pilot burner, only one path of burner and valve bank is provided, and the burner and the valve bank are generally configured according to designed gas volume, so that the initial running stage of a biogas project is caused, the anaerobic fermentation is also gradually put into operation and needs debugging and adjustment in the initial stage, the biogas volume is far short of the designed gas volume, and the condition of pulling a cart by a bull exists in the torch running, so that ignition or flameout is often caused, and continuous normal and safe combustion cannot be realized; the process needs to be carried out in time by depending on manual inspection, and potential safety hazards exist; the combustion can be gradually normal only when the gas production rate is close to the designed gas production rate in the later period; the methane quantity is large in the later period, and the conditions of fire dropping, fire floating, incomplete combustion and the like are easy to occur; there is also a case where the actual gas production rate is greatly varied from the design gas production rate for various reasons, which also affects the normal operation of the torch. In a word, the torch can not adapt to the change of the gas quantity, the applicable flow range is small, and the combustion quantity regulation ratio is small.
The existing torch has two air distribution modes, one is to arrange a fan and provide air (oxygen) required by combustion for the torch in a forced ventilation mode, and the other is to adopt a natural air suction mode for oxygen supply without the fan. From the practical use condition of a user, the forced ventilation torch with the fan can normally operate for a small-gas-quantity torch, the air required by combustion of the torch is greatly increased along with the increase of the methane quantity, the change of the gas quantity of the torch discharged as emergency combustion is also constantly changed according to the change or emergency of the production process, the air distribution capacity of the same fan is difficult to be timely matched along with the change of the methane quantity, the air quantity is too large to influence normal ignition and combustion during the initial ignition period or the re-ignition after flameout, the air distribution cannot follow the situation when the methane quantity is large, incomplete combustion is easily caused, the environment-friendly discharge requirement cannot be met, and potential safety hazards exist.
The existing torch technology adopts an ignition pilot lamp and a flame detector, for a large-volume torch, because the diameter of a torch barrel is large, the stability of gas supply of the torch is influenced by the ambient wind direction and the air volume when the gas is naturally sucked, when the methane volume is small, the flame fullness is small, and the ignition pilot lamp and the flame detection in one way cannot guarantee timely and correctly completing ignition and flame detection, so that ignition failure or misinformation is caused. Affecting the normal and safe combustion operation of the torch.
Because the safe and stable combustion of the existing torch burner has relatively small application range to the methane quantity, sometimes the engineering project is large, the final gas production is also continuously improved, in order to meet the use requirement, a plurality of torches have to be arranged to deal with the emergency combustion requirement, the occupied site is large, the pipeline and the control are complex, and the production and operation cost is greatly improved.
Disclosure of Invention
The invention aims to provide a sectional type gas torch combustion system to solve the problems in the prior art proposed in the background art.
In order to realize the purpose, the invention adopts the following technical scheme:
a sectional type gas torch combustion system comprises a torch;
the nozzles are arranged in the torch and correspond to the multi-stage burner valve groups;
the multi-stage combustor gas distribution system is characterized by further comprising a gas distribution pipe and a plc control system, wherein the gas distribution pipe is connected with the multi-stage combustor valve group, and the plc control system is used for controlling the gas distribution pipe to supply gas to the multi-stage combustor valve group and to the multiple groups of nozzles of the corresponding burners.
Preferably, the multi-stage burner valve block comprises: the primary burner valve bank, the secondary burner valve bank and the tertiary burner valve bank; the first-stage burner valve group, the second-stage burner valve group and the third-stage burner valve group are communicated with the gas distribution pipe.
Preferably, one-level combustor valves, second grade combustor valves, tertiary combustor valves all include:
the device comprises a graded burner air inlet pipe, and a manual valve, a pneumatic valve and a flame arrester which are assembled on the graded burner air inlet pipe; the pneumatic valve is connected to the plc control system.
Preferably, a plurality of sets of said nozzles comprises:
the burner comprises a staged burner vertical pipe and a combustion head nozzle pipe connected with the staged burner vertical pipe; the burner head nozzle pipe is communicated with the staged burner vertical pipe, and the staged burner vertical pipe is communicated with the corresponding staged burner air inlet pipe.
Preferably, the biogas distributor further comprises a biogas inlet main pipe, and the biogas inlet main pipe is communicated with the fuel gas distribution pipe.
Preferably, the multi-stage combustor further comprises a plurality of sets of igniters, and the plurality of sets of igniters are arranged corresponding to the multi-stage combustor.
Preferably, the plurality of sets of igniters each include:
an ignition pilot lamp and a flame detector; and the ignition pilot burner is connected with an ignition gas source.
Preferably, a shutter type air inlet is formed in the torch.
The invention has the technical effects and advantages that: compared with the prior art, the sectional type gas torch combustion system provided by the invention has the following advantages:
1. the invention distributes a main gas pipe through a gas distribution pipe, divides a burner into two or three staged burners, is provided with a control valve group, called as a primary burner, a secondary burner and a tertiary burner, can seamlessly switch the burners at all stages to carry out distribution design according to the possible yield of biogas of engineering projects and the change of convenient gas quantity, opens the primary burner to operate when the biogas yield is small in the initial stage or partial maintenance of the projects, and then puts the secondary burner or the tertiary burner into operation along with the increase of the biogas quantity or simultaneously burns the burners at several stages, so that the burning capacity of a torch is matched with the actual biogas quantity, the staged (staged) burning is realized, the burners at all stages can be automatically started or stopped according to the actual gas quantity program control, the staged (staged) burning is suitable for the burning of different gas quantities, and the burning is safe and stable.
2. The natural air suction automatic air distribution mode is adopted, the air-fuel ratio is automatically adjusted, the flame is uniformly dispersed, the flame is relatively short, the mixing is good, and the combustion flame is stable. Unsafe combustion conditions such as unstable combustion, incomplete combustion and easy flameout caused by mismatching of the air supply quantity of the fan and the gas quantity can be avoided.
3. The sectional staged combustion technology is adopted, the combustion control and the safety and reliability of the large-flow torch in different gas flows are solved, the gas combustion emission requirement in different stages and different flow rates can be met by one large-flow torch, a plurality of torches with different gas flows are not needed, the site space is reduced, the equipment cost is reduced, the economy is greatly improved, the cost is saved, the site is wider and more smooth, and the control is more convenient.
Drawings
FIG. 1 is a schematic top view of a sectional gas flare combustion system of the present invention;
FIG. 2 is a schematic front view of the sectional gas flare combustion system of the present invention.
In the figure:
1. a torch; 2. a nozzle; 201. a staged combustor riser; 202. a burner head nozzle tube; 3. a multi-stage burner valve block; 301. a primary burner valve block; 302. a secondary burner valve bank; 303. a tertiary burner valve bank; 304. a staged combustor air inlet pipe; 305. a manual valve; 306. a pneumatic (or electric) valve; 307. a flame arrestor; 4. a gas distribution pipe; 5. a biogas inlet main pipe; 6. an igniter; 601. igniting the pilot burner; 602. a flame detector; 7. shutter type air intake.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a sectional type gas torch combustion system shown in figures 1-2, comprising a torch 1;
and a plurality of groups of nozzles 2 arranged in the torch 1, wherein the plurality of groups of nozzles 2 correspond to the multi-stage burner valve group 3; still include gas distributing pipe 4 and plc control system, gas distributing pipe 4 with multistage combustor valves 3 are connected, plc control system is used for controlling gas distributing pipe 4 to multistage combustor valves 3 and the air supply volume that corresponds the multiunit nozzle.
The multistage burner valve group 3 comprises: a primary burner valve bank 301, a secondary burner valve bank 302, a tertiary burner valve bank 303; the first-stage burner valve group 301, the second-stage burner valve group 302 and the third-stage burner valve group 303 are all communicated with the gas distribution pipe 4. The first-level burner valve group 301, the second-level burner valve group 302 and the third-level burner valve group 303 all comprise:
a staged burner intake pipe 304, and a manual valve 305, a pneumatic (or electric) valve 306, a flame arrester 307 fitted on the staged burner intake pipe 304; the pneumatic (or electric) valve 306 is connected to the plc control system.
The plurality of sets of nozzles 2 includes: a staged burner riser 201 and a burner head nozzle pipe 202 connected with the staged burner riser 201; the burner head nozzle pipe 202 is communicated with the staged burner riser 201, and the staged burner riser 201 is communicated with the staged burner air inlet pipe 304. The biogas distributor is characterized by further comprising a biogas inlet main pipe 5, wherein the biogas inlet main pipe 5 is communicated with the fuel gas distribution pipe 4.
Still include multiunit point firearm 6, multiunit point firearm 6 corresponds multistage combustor 3 and sets up. The igniter 6 includes: an ignition pilot lamp 601 and a flame detector 602; the ignition pilot burner 601 is connected with an ignition air source. And a shutter type air inlet 7 is arranged on the torch 1.
Example 2
The technical route of the sectional type gas torch combustion system in the embodiment is that a torch combustor is designed into sectional type, a staged combustion mode is adopted, namely, the torch combustor is designed into two or three secondary or tertiary torch combustors which can independently run and jointly run through a gas distribution pipe, and nozzles of all levels of branch torch combustors are uniformly distributed in a torch cylinder body. The starting and stopping of each stage of torch burners can be controlled by a program according to the change of the gas quantity and put into operation in stages, and can also be started and stopped manually.
The sectional type torch burner is characterized in that a gas distributing pipe is arranged in front of a torch and is connected to a main gas inlet pipe, gas is divided into two or three paths of gas inlet pipes of the staged burners through the gas distributing pipe, the caliber of each path of gas inlet pipe of the staged burners is designed according to the size of the possible sectional operation gas amount of a project and the seamless switching of the burners at all levels when the gas amount is changed conveniently, and all gas amount ranges can be operated in a grading mode conveniently and stably and safely. The sum of the design flow of all the staged burners is the requirement of the total combustion amount of the flare design when all the staged burners are put into operation.
Each staged burner air inlet pipe is respectively provided with a torch control valve group (comprising a manual valve, an electric or pneumatic control valve and a flame arrester) with corresponding caliber, the staged burner air inlet pipes are connected to corresponding burner distribution vertical pipes in the torch through the control valve groups and then reach distributed burner nozzle pipes, each staged burner is uniformly distributed in the torch, and the gas supply and combustion of the corresponding burner are controlled by the valve groups, so that a secondary or tertiary burner is formed.
In order to adapt to the requirements of different working conditions and the change of the gas flow of the torch, the torch adopts staged combustion and automatic staged control for operation. The combustor is divided into a multi-stage combustion system according to different conditions such as the size of the discharged gas, the accidental discharge and the like. The combustion and smoke abatement effect can be well obtained when the flow of the discharged gas is small, the pressure of the discharged gas is controlled along with the increase of the flow of the discharged gas, and the burners at all stages are gradually put into use or stopped to operate after the control value is reached. When torch combustion ignition basic conditions are met, the first-stage combustor is started firstly when the discharged gas amount is small, the gas is sprayed out through the first-stage combustor and ignited by flame of an incandescent lamp, the second-stage combustor is started again when the gas amount reaches a set value along with the increase of the gas amount, the third-stage combustor is started according to a program along with the further increase of the gas amount, or two or three combined combustions in the first-stage combustor, the second-stage combustor and the third-stage combustor are started simultaneously, the PLC is adopted to realize efficient automatic grading control, the discharged gas flow adaptive range is wide, efficient smokeless combustion can be realized from zero to the maximum emergency discharge amount of the gas flow, and the safety of the system is high. Each stage of combustor is provided with an ignition pilot burner and a flame detector, an ignition gas source is controlled by an ignition solenoid valve or a pneumatic valve, and the pilot burner is kept burning normally under a normal state so that flare gas can be ignited in time when being discharged at any time to ensure the safety of the system. The pilot lamp is provided with an automatic ignition device, namely, when the pilot lamp is extinguished due to external factors, the pilot lamp can be automatically re-ignited so as to ensure the ignition reliability of the torch.
The sectional type torch adopts a shutter natural air suction automatic air distribution mode, and hot flue gas generated by torch combustion is discharged from the top of the torch, so that certain negative pressure is formed in a combustion area, and external air can automatically enter the torch from a shutter air suction port at the bottom of the torch continuously so as to ensure enough air quantity required by combustion of discharged air. The air entering the torch is matched with the torch combustion heads with special structures which are uniformly distributed on one hand, so that the discharged gas and the air are optimally mixed, and the smokeless combustion is realized; on the other hand, redundant air is further mixed with the smoke, so that the smoke exhaust temperature is effectively reduced, and the heat radiation capacity of the smoke to the surrounding environment is greatly reduced. Meanwhile, the discharged gas combustion flame and the combustion high-temperature area are sealed in the combustion chamber of the torch barrel, so that the leakage of the combustion flame heat radiation is avoided, the outside cannot see the flame light, and cannot feel the flame heat radiation.
The biogas inlet main pipe enters a fuel gas distribution pipe arranged in front of the torch, the main gas pipe is divided into two or three paths of staged combustor branch pipes through the fuel gas distribution pipe according to design requirements, each path of combustor branch pipe is respectively provided with a burner valve group of each stage consisting of a manual valve, a pneumatic or electric valve and a flame arrester, and biogas injection quantity in a nozzle pipe on a combustor combustion head arranged on a combustor vertical pipe behind is controlled, so that combustion of each stage of combustor is controlled.
The sectional type torch burner is provided with a group of ignition valve banks, the ignition gas source can use high-calorific-value gas such as natural gas and the like, and can also directly adopt discharged methane or other discharged gas, and the ignition of the pilot burner is controlled through the ignition valve banks.
The sectional type torch burner is provided with 2 groups or 3 groups of ignition pilot lamps and flame detectors, all pilot lamps are ignited at the same time, the flame detectors detect whether the pilot lamps are ignited to burn or not, and the pilot lamps are kept normally burning under the normal state, so that the pilot lamps can be ignited in time when the torch gas is discharged at any time, and the safety of the system is ensured. The pilot lamp is provided with an automatic ignition device, namely, when the pilot lamp is extinguished due to external factors, the pilot lamp can be automatically re-ignited so as to ensure the ignition reliability of the torch.
The torch sets up natural air inlet shutter, because the flue gas is discharged to the top after the torch burning, has the effect that the chimney drafts, and it is big that the head lower part negative pressure is big more to discharge the flue gas, inhales air from the torch lower part also more, draws required air quantity through the shutter is automatic according to the gas combustion volume in the torch, and the air distribution is stable. One part of air distribution is mixed with fuel gas to provide required combustion air amount, the redundant part of air distribution is mixed with high-temperature flue gas to reduce the temperature of discharged flue gas, and the temperature of the outer surface of the torch is reduced, so that the influence of heat radiation on the environment is also reduced.
Taking the 4500 cubic segmented flare burner configuration as an example in this embodiment:
the ignition gas source adopts DN50 pipeline as torch burning ignition gas source pipe (setting manual/automatic, ignition and flameout program), the high heating value gas natural gas is designed to be used or the discharged gas such as marsh gas is directly used, and the gas consumption is 4Nm 3/h.
A pipeline DN150 is adopted as a branch pipe of the first-level combustor in the 1 st path, pressure control combustion (manual/automatic and ignition flameout programs) is adopted, the normal discharge capacity is 750Nm3/h, and the fluctuation discharge capacity is 400-900 Nm 3/h.
A branch pipe of the second-stage combustor of the 2 nd path adopts a DN200 pipeline, pressure control combustion (manual/automatic and ignition flameout programs) is adopted, the normal discharge capacity is designed to be 1500Nm3/h, and the fluctuation discharge capacity is 800-1800 Nm 3/h.
The branch pipe of the 3 rd path three-stage combustor adopts a DN250 pipeline, pressure control combustion (manual/automatic and ignition flameout programs) is carried out, the normal discharge capacity is 2250Nm3/h, and the fluctuation discharge capacity is 1700-2350 Nm 3/h.
In the embodiment, the three paths of ignition pilot lamps and the flame detectors are separately arranged from the main pipe of the ignition air source DN50 through the control valve group, so that the ignition is stable, the stable ignition and combustion of each stage of combustor are ensured, and the phenomena of flame failure and flameout are avoided.
The embodiment adopts a shutter natural air suction structure to provide air required by combustion.
The torch operation is controlled by a PLC, the first-stage, second-stage and third-stage combustors are respectively and automatically controlled to start or stop to perform combustion operation according to the change of the discharged air quantity, the operation is automatically switched, and the operation can be stably and safely performed below the designed air quantity 4500. The gas combustion emission requirement of the large-flow torch in different stages and different flows can be met by the large-flow torch, multiple torches with different flows are not needed, the site space is reduced, the equipment cost is reduced, the economy is greatly improved, the cost is saved, the site is wider and more convenient to control.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a sectional type gas torch combustion system which characterized in that: comprises a torch (1); and a plurality of groups of nozzles (2) arranged in the torch (1), wherein the plurality of groups of nozzles (2) correspond to the multi-stage burner valve group (3); still include gas distributing pipe (4) and plc control system, gas distributing pipe (4) with multistage combustor valves (3) are connected, plc control system is used for controlling gas distributing pipe (4) and controls the air feed volume of the multiunit nozzle (2) that correspond through multistage combustor valves (3).
2. The staged gas flare combustion system of claim 1, wherein: the multi-stage burner valve group (3) comprises: the primary burner valve group (301), the secondary burner valve group (302) and the tertiary burner valve group (303), wherein the grading number of the burners can be 2-4 according to the size of gas quantity; the primary burner valve group (301), the secondary burner valve group (302) and the tertiary burner valve group (303) are communicated with the gas distribution pipe (4) and are respectively communicated with the corresponding groups of nozzles (2).
3. A segmented gas flare combustion system as claimed in claim 2, wherein: one-level combustor valves (301), second grade combustor valves (302), tertiary combustor valves (303) all include: a staged burner air inlet pipe (304), and a manual valve (305), a pneumatic valve (306) and a flame arrester (307) which are assembled on the staged burner air inlet pipe (304); the pneumatic valve (306) is connected to the plc control system.
4. A staged gas flare combustion system as claimed in claim 3, wherein: the plurality of sets of nozzles (2) comprises: the burner comprises a branch burner vertical pipe (201) and a burner head nozzle pipe (202) connected with the branch burner vertical pipe (201); the burner head nozzle pipe (202) is communicated with the staged burner vertical pipe (201), and the staged burner vertical pipe (201) is communicated with the air inlet pipe (304).
5. The staged gas flare combustion system of claim 1, wherein: the biogas distributor is characterized by further comprising a biogas inlet main pipe (5), wherein the biogas inlet main pipe (5) is communicated with the fuel gas distribution pipe (4).
6. The staged gas flare combustion system of claim 1, wherein: the multi-stage combustor is characterized by further comprising a plurality of groups of igniters (6), wherein the plurality of groups of igniters (6) are arranged corresponding to the multi-stage combustor (3).
7. The staged gas flare combustion system of claim 6, wherein: the multiple sets of igniters (6) each comprise: an ignition pilot lamp (601) and a flame detector (602); the ignition pilot burner (601) is connected with an ignition gas source.
8. The staged gas flare combustion system of claim 1, wherein: and a shutter type air inlet (7) is arranged on the torch (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210505828.7A CN114738786A (en) | 2022-05-10 | 2022-05-10 | Sectional type gas torch combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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