CN118347003B - A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof - Google Patents
A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof Download PDFInfo
- Publication number
- CN118347003B CN118347003B CN202410776730.4A CN202410776730A CN118347003B CN 118347003 B CN118347003 B CN 118347003B CN 202410776730 A CN202410776730 A CN 202410776730A CN 118347003 B CN118347003 B CN 118347003B
- Authority
- CN
- China
- Prior art keywords
- air
- waste gas
- combustion
- precombustion chamber
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002912 waste gas Substances 0.000 title claims abstract description 96
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 74
- 239000007788 liquid Substances 0.000 title claims abstract description 73
- 239000002699 waste material Substances 0.000 title claims abstract description 73
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 16
- 238000009841 combustion method Methods 0.000 title claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000007921 spray Substances 0.000 claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 21
- 239000002737 fuel gas Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/12—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating using gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
Abstract
The invention discloses a low-nitrogen combustor suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof, wherein the combustor comprises a primary combustion-supporting air box; a precombustion chamber positioned below the primary combustion air box; the first waste gas collection box is connected between the primary combustion-supporting wind box and the precombustion chamber, the primary combustion-supporting wind box comprises two primary wind distribution wind channels, namely a rotational flow wind channel and a direct current wind channel, and a rotational flow wind adjusting component for adjusting rotational flow wind rotational flow intensity and a primary wind and rotational flow wind proportion adjusting component are arranged in the rotational flow wind channel; the second waste gas collection box is arranged outside the middle part of the precombustion chamber; the waste liquid and gas integrated spray gun is arranged at the central shaft position inside the primary combustion-supporting air box; an incinerator below the precombustion chamber; and the secondary air duct is arranged outside the precombustion chamber. The burner selects different waste gas headers aiming at waste gas and waste liquid with different characteristics, and can still keep a better combustion state under the condition of fluctuation of waste gas and waste liquid flow.
Description
Technical Field
The invention relates to the technical field of combustors, in particular to a low-nitrogen combustor suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof.
Background
In recent years, the steady development of the chemical industry and the improvement of environmental protection requirements, the incineration of waste gas and waste liquid of each chemical process becomes an environmental protection hot spot and difficult problem. The incineration is a technology with higher waste gas and waste liquid treatment breaking rate, and compared with other technologies, the method can clean and treat waste gas and waste liquid, and the high-temperature flue gas after incineration has very excellent waste heat recovery value.
In chemical production, waste gas and waste liquid generated by each process link need to be combusted, but the waste gas and waste liquid generated by each device of the chemical process is various, the component difference is large, the flow and component fluctuation range under each working condition of the device is large, and the load ratio is regulated by the existing burner, namely, the minimum value of the design flow: the maximum design flow is limited, generally 1:10, the capability of the burner for treating waste gas and waste liquid is usually designed according to the maximum flow, and the pre-designed performance curve of the waste gas and waste liquid spray gun has the minimum working flow in the working range and cannot meet the requirement of the minimum flow of the device. Moreover, the fluctuation of the heat value of the waste gas and the waste liquid is relatively large, the traditional waste gas and the waste liquid injection can generate licking burning or fire removal, so that the service life of the burner is short, the flame is unstable, and the emission of nitrogen oxides is often out of standard because of insufficient combustion.
Disclosure of Invention
Aiming at the technical problems, the invention provides the low-nitrogen burner which has reasonable design and wide load condition range, can flexibly adjust the load and is suitable for mixed combustion of various waste gases and waste liquid under various working conditions. The burner adopts a modular structure, and different modules are selected for waste gas and waste liquid with different characteristics, so that the burner still achieves the aim of keeping a better combustion state under the condition of fluctuation of flow of waste gas and waste liquid.
In order to achieve the technical purpose, the invention adopts the following technical means:
the utility model provides a be suitable for low nitrogen combustor of multiple operating mode waste gas waste liquid mixed combustion, includes from high to low through flange spare connection in proper order:
The device comprises a primary combustion air box, a first waste gas header, a precombustion chamber and an incinerator, wherein the primary combustion air box comprises two primary air distribution air channels, namely a rotational flow air channel and a direct current air channel, and a rotational flow air adjusting component for adjusting rotational flow intensity of rotational flow air is arranged in the rotational flow air channel;
the first exhaust gas collecting box is internally provided with a central cavity communicated with the rotational flow air duct and a plurality of first exhaust gas collecting box units which are arranged on the outer side of the central cavity in a surrounding manner and are sequentially arranged along the height direction of the burner, the plurality of first exhaust gas collecting box units are mutually independent, and each first exhaust gas collecting box unit is used for leading exhaust gas into the precombustion chamber through an exhaust gas nozzle;
the second waste gas collection box is an annular box body arranged on the outer side of the middle part of the precombustion chamber, and a second waste gas channel which is used for communicating the second waste gas collection box with the inner part of the precombustion chamber is arranged on the chamber wall of the precombustion chamber;
The waste liquid and gas integrated spray gun is arranged at the central shaft position inside the primary combustion air box and is used for introducing waste liquid and gas into the precombustion chamber;
and the secondary air duct is arranged outside the precombustion chamber and below the second waste gas collection box, and secondary air enters the incinerator through the secondary air duct.
The inner center of the primary combustion-supporting air box is vertically provided with a direct-current air duct with openings at the upper end and the lower end, two sides of the direct-current air duct are fixedly connected with the inner wall of the primary combustion-supporting air box through an inner supporting piece, and the lower end of the direct-current air duct extends to the junction of the primary combustion-supporting air box and the precombustion chamber;
The primary air direct current wind proportion adjusting cylinder is coaxially inserted into the direct current wind cylinder and is positioned at the upper end of the direct current wind cylinder, the upper end of the primary air direct current wind proportion adjusting cylinder penetrates through the upper panel of the primary combustion air box through an adjusting rod to be connected with an adjusting handle, and an adjusting gap is reserved between the upper end of the primary air direct current wind proportion adjusting cylinder and the upper panel of the primary combustion air box after the primary air direct current wind proportion adjusting cylinder is connected;
the inner ring of the cyclone air duct ring cover is fixedly connected with the outer wall of the direct-current air duct;
The cyclone air duct is coaxially sleeved on the outer side of the direct-current air duct and is positioned below the cyclone air duct annular cover, and an annular cyclone channel is formed between the cyclone air duct and the direct-current air duct;
The swirl sheets are arranged between the swirl air duct annular cover and the swirl air duct, the swirl sheets comprise a plurality of swirl sheets, and the swirl sheets are uniformly arranged along the circumferential direction of the direct-current air duct;
the part of the primary air sequentially passes through the upper space of the cyclone air duct annular cover, the adjusting gap and the primary air direct-current air proportion adjusting cylinder to enter the direct-current air duct to form the direct-current air duct, and enters the precombustion chamber;
and after the other part of the primary air passes through the interval spaces between the cyclone sheets to form cyclone, the cyclone passes through the annular cyclone channel and the central chamber in sequence and then enters the precombustion chamber.
The swirl wind adjustment assembly includes:
The swirl plate angle adjusting handle is arranged on the surface of the upper panel of the primary combustion-supporting air box;
one end of the rotational flow sheet angle adjusting driving shaft is connected with the rotational flow sheet angle adjusting handle, and the other end of the rotational flow sheet angle adjusting driving shaft is vertically downward arranged and connected with one of the rotational flow sheets;
Each cyclone sheet is fixedly connected with a vertically arranged cyclone sheet angle adjusting driven shaft,
An arc-shaped through groove for allowing the upper end of the driven shaft to pass through is formed in the cyclone air channel ring cover corresponding to each cyclone sheet;
the swirl piece adjusting rotating disc is coaxially sleeved outside the direct-current wind barrel and is positioned on the upper surface of the swirl wind barrel ring cover, strip holes are formed in the swirl piece adjusting rotating disc corresponding to the angle adjusting driven shafts of the swirl pieces, and the swirl piece adjusting rotating disc can rotate relative to the direct-current wind barrel when the angle adjusting driven shafts of the swirl pieces rotate, so that all the swirl pieces are driven to rotate together at the same angle.
The waste liquid and gas integrated spray gun comprises a spray gun body which is coaxially sleeved from inside to outside in sequence:
a central tube spray gun, a first sleeve and a second sleeve, wherein,
The central tube spray gun is used for introducing waste liquid;
The annular separation cavity between the first sleeve and the central tube spray gun is used for introducing compressed air or steam of atomized waste liquid;
the annular separation cavity between the first sleeve and the second sleeve is used for introducing fuel gas.
The second exhaust passage between the second exhaust header and the prechamber is arranged in a tangential circle.
The primary combustion-supporting air box is connected with the first waste gas collection box and the first waste gas collection box is connected with the precombustion chamber through first flanges respectively.
And a plurality of the first waste gas header units are connected through a second flange.
Each first exhaust header unit is connected with the precombustor through a plurality of exhaust nozzles, exhaust gas is sprayed into the precombustor, and the plurality of exhaust nozzles are uniformly distributed along the circumferential direction of the first exhaust header.
The inner cavity of the precombustion chamber is sequentially provided with a first expanding section, a straight barrel section and a second expanding section from top to bottom.
The combustion method of the low-nitrogen combustor suitable for mixed combustion of waste gas and waste liquid under various working conditions,
The waste liquid and the fuel gas are sprayed into the precombustion chamber from the waste liquid and fuel gas integrated spray gun;
The primary air enters the burner and is divided into rotational flow air and direct current air, the proportion of the rotational flow air to the direct current air is adjusted through the adjusting rod, and the distance between the primary air direct current air proportion adjusting cylinder and the burner panel is adjusted through the adjusting rod to change the flow;
The swirl strength of the primary air is changed through a swirl adjusting component, so that the premixed combustion strength of the burner is controlled, and the burner is suitable for multiple working conditions;
Flow fluctuation range: 1:50, heating value fluctuation range: the first waste gas of 3000-60000kJ/Nm3 is sprayed into the flame root of the precombustion chamber through the first waste gas collecting box and the waste gas nozzle, so that flame combustion is stabilized and supported; the first exhaust gas collecting box comprises a plurality of mutually independent first exhaust gas collecting box units, and can simultaneously burn a plurality of first exhaust gases according to requirements;
Flow fluctuation range: 1:50, heating value fluctuation range: the second waste gas of 0-30000kJ/Nm3 enters the tail end of flame in the precombustion chamber through the second waste gas collecting box and the second waste gas channel, the flame preheats the waste gas, the second waste gas does not influence flame stabilization, and the air flue is arranged in a tangential circle, so that premixing is enhanced, and the combustion is full;
The combustion is divided into two stages, wherein the first stage is to form a high-temperature anoxic combustion environment in the precombustion chamber to inhibit the generation of nitrogen oxides; the second stage is that the combustion products of the first stage fully react with oxygen with the oxygen content of not less than 6% in the flue gas at 1300-1500 ℃ by secondary air in the incinerator, so that the waste gas and waste liquid breaking rate reaches 99.9%.
(1) The low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions is provided by the invention, the gas spray gun for accompanying combustion is designed into a whole with the waste liquid spray gun, waste liquid is sprayed into the hearth from the central pipe, waste liquid atomized air is sent into the gun head from the central sleeve pipe to atomize the waste liquid, and gas is sent into the hearth from the gas hole of the sleeve pipe gun head from the sleeve pipe of the atomized air pipe, so that the occupied area of the burner panel is reduced, and when the waste liquid spray gun is added with multiple waste liquid, the design of the burner panel is more compact.
(2) The primary air entering the burner provided by the invention is divided into two-stage air distribution: swirl wind and direct current wind. The ratio of the rotational flow wind to the direct flow wind can be adjusted by adjusting the adjusting rod, and the distance between the primary wind direct flow wind ratio adjusting cylinder and the burner panel is changed by adjusting the height of the adjusting rod.
(3) According to the combustor provided by the invention, the rotational flow strength of rotational flow wind of primary wind can be realized by adjusting the angle of the rotational flow sheet, the rotational flow sheet angle adjusting driving shaft can be driven to rotate by adjusting the rotational flow sheet angle adjusting handle (the adjusting angle range is 0-60 DEG) on the combustor panel, the rotational flow sheet connected with the rotational flow sheet angle adjusting driving shaft rotates, the rotational flow sheet angle adjusting driven shaft on the rotational flow sheet rotates along with the rotational flow sheet, and the rotational angle of the rotational flow sheet angle adjusting driven shaft can be adapted by the designed fan-shaped hole on the rotational flow air duct ring cover; the rotational flow sheet adjusting rotating disc is provided with a slotted hole, and is suitable for rotating the rotational flow sheet angle adjusting driven shaft, and meanwhile, the rotational flow sheet adjusting rotating disc is also sleeved outside the direct-current wind barrel to rotate, so that all rotational flow sheets are driven to rotate together. Thereby, when the angle adjusting handle of the swirl plate is adjusted, all the swirl plates in the burner rotate with the angle. The premixed combustion intensity of the burner can be controlled, and the burner is suitable for multiple working conditions.
(4) According to the burner provided by the invention, the direct-current wind enters the direct-current wind channel through the wind distribution hole at the upper end of the direct-current wind barrel, so that the uniformity of the direct-current wind entering the flame of the burner is ensured, the rigidity of the flame is ensured, and the flame is ensured not to be burned in a deviation manner when the heat value of various waste gases fluctuates.
(5) The burner provided by the invention has the flow fluctuation range: 1:50, heating value fluctuation range: the first waste gas of 8000-60000kJ/Nm3 is sprayed into the flame root of the precombustion chamber through the first waste gas collecting box and the waste gas nozzle, flame combustion is stabilized and supported, and the first waste gas enters the precombustion chamber through 20-50 nozzles which are uniformly distributed in the circumferential direction, so that the flame temperature is reduced, the generation of temperature-type nitrogen oxides is reduced, the structural resistance of the nozzle is reduced, and the nozzle is suitable for larger heat value fluctuation and load regulation ratio working conditions. Considering that the first waste gas is of various types, some factories can achieve more than one hundred types, and can be combined, and some waste gases can not be combined, and can react or explode, and a plurality of strands of waste gases are generally combined, so that the first waste gas collecting box comprises a plurality of mutually independent first waste gas collecting box units so as to realize simultaneous treatment of a plurality of first waste gases.
(6) The burner provided by the invention has the flow fluctuation range: 1:50, heating value fluctuation range: the second waste gas of 0-30000kJ/Nm3 enters the precombustion chamber through a second waste gas channel, and the air channels are arranged in a tangential circle, so that the combustion is sufficient; meanwhile, because the resistance drop in the air passage is lower than that of the nozzle structure with the open pores, the resistance drop of the air passage can be smaller than 1kPa, and the nozzle structure with the open pores is usually larger than 10kPa, the low resistance drop structure is suitable for the exhaust gas with changeable working conditions, such as large heat value fluctuation, large flow regulation ratio and the like.
(7) The burner provided by the invention is provided with the precombustor, the inner wall of the precombustor is provided with the fireproof lining, the fireproof lining is also a heat accumulator when fire resistance is realized, the first waste gas, the second waste gas and the waste liquid can cause unstable flame when the working condition fluctuation is severe, the existence of the high-temperature heat accumulator has the effects of preheating and stabilizing the waste gas and the waste liquid, and the reinforced burner is wholly resistant to the instability caused by the working condition fluctuation.
(8) The air distribution of the burner provided by the invention is divided into primary air and secondary air, combustion is divided into two stages, and the first stage is that a high-temperature anoxic combustion environment is formed in a precombustion chamber, so that the generation of nitrogen oxides is inhibited; the second stage is that the combustion products of the first stage fully react with excessive oxygen (the oxygen content of flue gas is not less than 6%) at a relatively low temperature (1100 ℃) by secondary air in the incinerator, so that the waste gas and waste liquid breaking rate reaches 99.9%.
Drawings
FIG. 1 is a schematic diagram of a low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions;
wherein, 1, the waste liquid fuel gas integrated spray gun; 2. a preformed hole of the ignition gun; 3. an adjusting rod; 4. a rotational flow sheet angle adjusting handle; 5. the angle of the rotational flow sheet is used for adjusting the driving shaft; 6. swirl plates; 7. a primary combustion-supporting air box; 8. a first exhaust header unit a; 9. a first exhaust header unit B; 10. an exhaust gas nozzle A; 11. an exhaust gas nozzle B; 12. a flame detector preformed hole; 13. a primary air direct current air proportion adjusting cylinder; 14. a swirl plate adjusting rotating disc; 15. a cyclone air duct ring cover; 16. the angle of the rotational flow sheet adjusts the driven shaft; 17. a direct current wind barrel; 18. a rotational flow wind barrel;
FIG. 2 is a schematic diagram of the flow direction of gas in a low-nitrogen burner structure suitable for mixed combustion of waste gas and waste liquid under various working conditions;
19. a precombustion chamber; 20. a second exhaust header; 21. a second exhaust passage; 22. a secondary air duct;
FIG. 3 is a schematic view of a swirl wind adjusting assembly according to the present invention.
Detailed Description
The present application will be further illustrated with reference to the drawings and specific examples, which are intended to be illustrative of the application and not to be limiting of the scope of the application, since modifications will occur to those skilled in the art upon reading the application and which are within the scope of the application as defined by the appended claims.
As shown in figure 1, the low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions is characterized by comprising a primary combustion air box 7, a waste liquid and gas integrated spray gun 1 is arranged at the central shaft position inside the primary combustion air box 7, an ignition gun preformed hole 2 is arranged on the primary combustion air box 7 panel, a flame detector preformed hole 12 is arranged on the primary combustion air box 7 panel, an adjusting rod 3 is arranged on the primary combustion air box 7 panel,
The center of the interior of the primary combustion air box is vertically provided with a direct current air duct 17 with openings at the upper end and the lower end, two sides of the direct current air duct 17 are fixedly connected with the inner wall of the primary combustion air box 7 through an inner supporting piece, the lower end of the direct current air duct 17 extends to the junction of the primary combustion air box and the precombustion chamber, the upper end is connected with a panel of the primary combustion air box 7, and a direct current air channel area is a pore plate;
The primary air direct current wind proportion adjusting cylinder 13 is coaxially inserted into the direct current wind cylinder 17 and is positioned at the upper end of the direct current wind cylinder 17, the upper end of the primary air direct current wind proportion adjusting cylinder 13 is connected with the upper panel of the primary combustion air box 7 through the adjusting rod 3, and an adjusting gap is reserved between the upper end of the primary air direct current wind proportion adjusting cylinder 13 and the upper panel of the primary combustion air box 7 after the connection;
The inner ring of the cyclone air duct ring cover 15 is fixedly connected with the outer wall of the direct-current air duct 17;
the cyclone air duct 18 is coaxially sleeved on the outer side of the direct-current air duct 17 and is positioned below the cyclone air duct annular cover 15, and an annular cyclone channel is formed between the cyclone air duct 18 and the direct-current air duct 17;
The cyclone sheets 6 are arranged between the cyclone air duct annular cover 15 and the cyclone air duct 18, the cyclone sheets 6 comprise a plurality of cyclone sheets 6 which are uniformly arranged along the circumferential direction of the direct-current air duct 17;
Part of the primary air sequentially passes through the upper space of the cyclone air duct annular cover 15, the adjusting gap and the primary air direct current air proportion adjusting cylinder 13, enters the direct current air duct 17 to form the direct current air duct, and enters the precombustion chamber;
The other part of the primary air passes through the interval spaces between the cyclone sheets 6 to form a cyclone, and then sequentially passes through the annular cyclone channel and the central chamber to enter the precombustion chamber 19.
The swirl wind adjustment assembly includes:
The swirling sheet angle adjusting handle 4 is arranged on the surface of the upper panel of the primary combustion-supporting air box 7;
One end of the rotational flow sheet angle adjusting driving shaft 5 is connected with the rotational flow sheet angle adjusting handle 4, and the other end of the rotational flow sheet angle adjusting driving shaft is vertically downward arranged and connected with one of the rotational flow sheets 6;
Each cyclone sheet 6 is fixedly connected with a vertically arranged cyclone sheet angle adjusting driven shaft 16,
An arc-shaped through groove for allowing the upper end of a driven shaft 16 for adjusting the angle of the cyclone sheet to pass through is formed in the cyclone air flue ring cover 15 corresponding to each cyclone sheet 6;
The rotational flow sheet adjusting rotating disc 14 is coaxially sleeved outside the direct-current wind air duct 17 and is positioned on the upper surface of the rotational flow wind duct annular cover 15, a strip hole is formed in the rotational flow sheet adjusting rotating disc 14 corresponding to each rotational flow sheet angle adjusting driven shaft 16, and when the rotational flow sheet angle adjusting driven shafts 16 rotate, the rotational flow sheet adjusting rotating disc 14 can rotate relative to the direct-current wind air duct 17, so that all rotational flow sheets 6 are driven to rotate at the same angle.
As a preferred embodiment of the present invention, two first exhaust gas header units are connected between the primary combustion air box 7 and the prechamber 19, and the two first exhaust gas header units are independent from each other and respectively introduce exhaust gas into the prechamber 19 through exhaust nozzles.
The cyclone air duct ring cover 15 is vertically welded with the direct current air duct 17, and the cyclone air duct 18 is connected with the cyclone air duct ring cover 15 through a cyclone sheet angle adjusting driving shaft 5.
The burner head of the invention is provided with waste liquid and fuel gas to provide main flame, the rear part is provided with a precombustion chamber, and the precombustion chamber is in a high-temperature oxygen-deficient environment to provide a space for the waste liquid burner and a space for mixing and heating waste gas. The burner is provided with secondary air to further support the flame.
The waste liquid spray gun adopts a gas-waste liquid integrated type, the outer sleeve of the waste liquid spray gun is a waste liquid atomizing medium channel, and the outer sleeve of the waste liquid atomizing medium channel is a gas spray gun. When the flow and the heat value of the waste liquid fluctuate, the pressure and the flow of the fuel gas are stable, the rigidity of the mixed combustion flame is good, and the combustion is stable.
The waste gas adopts the form of connecting the inlet header with the group pipe, the pressure drop of the waste gas spray pipe is small, and the waste gas enters the precombustion chamber for mixing and preheating, so that the flame is enhanced. When the flow and the heat value of the exhaust gas are changed, the whole flame of the burner is not affected, and the combustion is stable.
The waste liquid enters the burner through the waste liquid and gas integrated spray gun, the waste liquid enters the central tube spray gun, the first sleeve on the outer layer of the waste liquid gun structure is compressed air or steam for atomizing the waste liquid, and the second sleeve on the outer layer of the first sleeve is a gas gun for assisting combustion.
According to the combustion method of the low-nitrogen combustor suitable for mixed combustion of waste gas and waste liquid under various working conditions, the combustor is formed by combining various modules, and the collocation design can be selected according to the heat value characteristics, the flow characteristics and the like of the actual waste gas and waste liquid; the burner is used for staged combustion, air distribution of primary combustion is divided into rotational flow and direct current, the air distribution proportion of a system can be flexibly adjusted to realize low-nitrogen combustion, and the burner is specifically:
the waste liquid and the fuel gas are sprayed into the precombustion chamber from the waste liquid and fuel gas integrated spray gun;
The primary air enters the burner and is divided into rotational flow air and direct current air, the proportion of the rotational flow air to the direct current air is adjusted through the adjusting rod, and the distance between the primary air direct current air proportion adjusting cylinder and the burner panel is adjusted through the adjusting rod to change the flow;
The swirl strength of the primary air is changed through a swirl adjusting component, so that the premixed combustion strength of the burner is controlled, and the burner is suitable for multiple working conditions;
The first exhaust gas header comprises a plurality of mutually independent first exhaust gas header units;
Flow fluctuation range: 1:50, heating value fluctuation range: the first waste gas of 8000-60000kJ/Nm3 is sprayed into the flame root of the precombustion chamber through the first waste gas collecting box and the waste gas nozzle to stabilize and support flame combustion, and enters the precombustion chamber through 20-50 evenly circumferentially distributed nozzles, the dispersed combustion technology is used to reduce the flame temperature and the generation of temperature nitrogen oxides,
Flow fluctuation range: 1:50, heating value fluctuation range: the second waste gas of 0-30000kJ/Nm3 enters the tail end of flame in the precombustion chamber through the second waste gas collecting box and the second waste gas channel, the flame preheats the waste gas with low heat value, the second waste gas can not influence flame stabilization, and the air flue is arranged in a tangential circle, so that premixing is enhanced, and the combustion is full;
the combustion is divided into two stages, wherein the first stage is to form a high-temperature anoxic combustion environment in the precombustion chamber to inhibit the generation of nitrogen oxides; the second stage is that the combustion products of the first stage fully react with oxygen with the oxygen content of not less than 6% in the flue gas at 1100 ℃ by secondary air in the incinerator, so that the waste gas and waste liquid breaking rate reaches 99.9%.
Primary combustion-supporting air enters the burner through a primary combustion-supporting air box; the secondary air enters the incinerator (not shown in the drawings) through the secondary air duct.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (3)
1. The utility model provides a be suitable for low nitrogen combustor of multiple operating mode waste gas waste liquid mixed combustion, includes from high to low through flange spare connection in proper order:
the primary combustion-supporting air box, the first waste gas collecting box, the precombustion chamber and the incinerator are characterized in that,
The primary combustion-supporting air box comprises two primary air distribution air channels, namely a rotational flow air channel and a direct current air channel, and a rotational flow air adjusting component for adjusting rotational flow intensity of rotational flow air is arranged in the rotational flow air channel;
the first exhaust gas collecting box is internally provided with a central cavity communicated with the rotational flow air duct and a plurality of first exhaust gas collecting box units which are arranged on the outer side of the central cavity in a surrounding manner and are sequentially arranged along the height direction of the burner, the plurality of first exhaust gas collecting box units are mutually independent, and each first exhaust gas collecting box unit is used for leading exhaust gas into the precombustion chamber through an exhaust gas nozzle;
the second waste gas collection box is an annular box body arranged on the outer side of the middle part of the precombustion chamber, and a second waste gas channel which is used for communicating the second waste gas collection box with the inner part of the precombustion chamber is arranged on the chamber wall of the precombustion chamber;
The waste liquid and gas integrated spray gun is arranged at the central shaft position inside the primary combustion air box and is used for introducing waste liquid and gas into the precombustion chamber;
the secondary air duct is arranged outside the precombustion chamber and below the second waste gas collection box, and secondary air enters the incinerator through the secondary air duct;
The inner center of the primary combustion air box is vertically provided with a direct-current air duct (17) with openings at the upper end and the lower end, two sides of the direct-current air duct (17) are fixedly connected with the inner wall of the primary combustion air box through an inner supporting piece, and the lower end of the direct-current air duct (17) extends to the junction of the primary combustion air box and the precombustor;
The primary air direct current wind proportion adjusting cylinder is coaxially inserted into the direct current wind cylinder (17) and is positioned at the upper end of the direct current wind cylinder (17), the upper end of the primary air direct current wind proportion adjusting cylinder penetrates through the upper panel of the primary combustion-supporting wind box through an adjusting rod to be connected with the angle adjusting handle of the swirl plate, and an adjusting gap is reserved between the upper end of the primary air direct current wind proportion adjusting cylinder and the upper panel of the primary combustion-supporting wind box after the connection;
the inner ring of the cyclone air duct ring cover is fixedly connected with the outer wall of the direct-current air duct (17);
The cyclone air duct (18) is coaxially sleeved on the outer side of the direct-current air duct (17) and is positioned below the cyclone air duct annular cover, and an annular cyclone channel is formed between the cyclone air duct (18) and the direct-current air duct (17);
The swirl sheets are arranged between the swirl air duct annular cover and the swirl air duct (18), the swirl sheets comprise a plurality of swirl sheets, and the swirl sheets are uniformly arranged along the circumferential direction of the direct-current air duct (17);
the part of the primary air sequentially passes through the upper space of the cyclone air duct annular cover, the adjusting gap and the primary air direct current air proportion adjusting cylinder to enter the direct current air duct (17) to form the direct current air duct, and enters the precombustion chamber;
the other part of the primary air passes through the interval spaces between the cyclone sheets to form cyclone, and then sequentially passes through the annular cyclone channel and the central chamber to enter the precombustion chamber;
The swirl wind adjustment assembly includes:
the angle adjusting handle of the swirling sheet angle swirling sheet is arranged on the surface of the upper panel of the primary combustion air box;
one end of the rotational flow sheet angle adjusting driving shaft is connected with the rotational flow sheet angle adjusting handle, and the other end of the rotational flow sheet angle adjusting driving shaft is vertically downward arranged and connected with one of the rotational flow sheets;
Each cyclone sheet is fixedly connected with a vertically arranged cyclone sheet angle adjusting driven shaft,
An arc-shaped through groove for allowing the upper end of the driven shaft to pass through is formed in the cyclone air channel ring cover corresponding to each cyclone sheet;
The swirl plate adjusting rotating disc is coaxially sleeved outside the direct-current wind barrel (17) and is positioned on the upper surface of the swirl wind barrel ring cover, a strip hole is formed in the swirl plate adjusting rotating disc corresponding to each swirl plate angle adjusting driven shaft, and the swirl plate adjusting rotating disc can rotate relative to the direct-current wind barrel (17) when the swirl plate angle adjusting driven shafts rotate, so that all swirl plates are driven to rotate at the same angle;
The waste liquid and gas integrated spray gun comprises a spray gun body which is coaxially sleeved from inside to outside in sequence:
a central tube spray gun, a first sleeve and a second sleeve, wherein,
The central tube spray gun is used for introducing waste liquid;
The annular separation cavity between the first sleeve and the central tube spray gun is used for introducing compressed air or steam of atomized waste liquid;
The annular separation cavity between the first sleeve and the second sleeve is used for introducing fuel gas;
The second exhaust passage between the second exhaust header and the precombustion chamber is arranged in a tangential circle;
the primary combustion-supporting air box is connected with the first waste gas collection box and the first waste gas collection box is connected with the precombustion chamber through a first flange respectively;
The plurality of first waste gas header units are connected through a second flange;
Each first exhaust header unit is connected with the precombustor through a plurality of exhaust nozzles, exhaust gas is sprayed into the precombustor, and the plurality of exhaust nozzles are uniformly distributed along the circumferential direction of the first exhaust header.
2. The low-nitrogen burner applicable to mixed combustion of waste gas and waste liquid under various working conditions according to claim 1, wherein the inner cavity of the precombustion chamber is sequentially provided with a first expanding section, a straight barrel section and a second expanding section from top to bottom.
3. The combustion method of the low-nitrogen combustor suitable for mixed combustion of waste gas and waste liquid under various working conditions according to any one of claims 1-2 is characterized in that,
The waste liquid and the fuel gas are sprayed into the precombustion chamber from the waste liquid and fuel gas integrated spray gun;
The primary air enters the burner and is divided into rotational flow air and direct current air, the proportion of the rotational flow air to the direct current air is adjusted through the adjusting rod, and the distance between the primary air direct current air proportion adjusting cylinder and the burner panel is adjusted through the adjusting rod to change the flow;
The swirl strength of the primary air is changed through a swirl adjusting component, so that the premixed combustion strength of the burner is controlled, and the burner is suitable for multiple working conditions;
Flow fluctuation range: 1:50, heating value fluctuation range: the first waste gas of 3000-60000kJ/Nm3 is sprayed into the flame root of the precombustion chamber through the first waste gas collecting box and the waste gas nozzle, so that flame combustion is stabilized and supported; the first exhaust gas collecting box comprises a plurality of mutually independent first exhaust gas collecting box units, and can simultaneously burn a plurality of first exhaust gases according to requirements;
Flow fluctuation range: 1:50, heating value fluctuation range: the second waste gas of 0-30000kJ/Nm3 enters the tail end of flame in the precombustion chamber through the second waste gas collecting box and the second waste gas channel, the flame preheats the waste gas, the second waste gas does not influence flame stabilization, and the air flue is arranged in a tangential circle, so that premixing is enhanced, and the combustion is full;
The combustion is divided into two stages, wherein the first stage is to form a high-temperature anoxic combustion environment in the precombustion chamber to inhibit the generation of nitrogen oxides; the second stage is that the combustion products of the first stage fully react with oxygen with the oxygen content of not less than 6% in the flue gas at 1300-1500 ℃ by secondary air in the incinerator, so that the waste gas and waste liquid breaking rate reaches 99.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410776730.4A CN118347003B (en) | 2024-06-17 | 2024-06-17 | A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410776730.4A CN118347003B (en) | 2024-06-17 | 2024-06-17 | A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118347003A CN118347003A (en) | 2024-07-16 |
| CN118347003B true CN118347003B (en) | 2024-11-26 |
Family
ID=91819861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410776730.4A Active CN118347003B (en) | 2024-06-17 | 2024-06-17 | A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118347003B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119508827A (en) * | 2025-01-16 | 2025-02-25 | 上海岱鼎工业设备有限公司 | A combined burner with adaptive exhaust gas calorific value |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208237863U (en) * | 2017-12-19 | 2018-12-14 | 陕西宏远流体控制设备有限公司 | A kind of ultralow nitrogen oxide burner of air fuel gas fractional combustion |
| CN114198751A (en) * | 2021-11-29 | 2022-03-18 | 北京航化节能环保技术有限公司 | Double-duct adjustable gas-liquid combined combustor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280604A (en) * | 2000-03-31 | 2001-10-10 | Osaka Gas Co Ltd | Combination oil and gas burner and exhaust gas treating device using the same |
| GB2544520A (en) * | 2015-11-19 | 2017-05-24 | Edwards Ltd | Effluent gas treatment apparatus and method |
| CN215372504U (en) * | 2021-02-03 | 2021-12-31 | 唐山金沙燃烧热能股份有限公司 | Burner for burning waste liquid and various waste gases |
-
2024
- 2024-06-17 CN CN202410776730.4A patent/CN118347003B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208237863U (en) * | 2017-12-19 | 2018-12-14 | 陕西宏远流体控制设备有限公司 | A kind of ultralow nitrogen oxide burner of air fuel gas fractional combustion |
| CN114198751A (en) * | 2021-11-29 | 2022-03-18 | 北京航化节能环保技术有限公司 | Double-duct adjustable gas-liquid combined combustor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118347003A (en) | 2024-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111780106B (en) | Flameless burner of steel rolling heating furnace and application thereof | |
| CN218993423U (en) | Incineration device and incineration system | |
| CN113587087A (en) | Premixing type hydrogen-rich waste gas blending combustion burner | |
| CN118347003B (en) | A low-nitrogen burner suitable for mixed combustion of waste gas and waste liquid under various working conditions and a combustion method thereof | |
| CN109899786A (en) | Nonflame low NO and nonflame low nitrogen burning method | |
| CN215637150U (en) | Hydrogen-rich waste gas blending combustion burner | |
| CN113587092B (en) | A low-pressure, low-calorific value gas fuel and hydrogen mixed combustion device and method | |
| CN213930980U (en) | Torch burner | |
| CN113864780A (en) | Low nitrogen gas burner | |
| CN116293815A (en) | Low nitrogen hydrogen combustion chamber structure | |
| CN215982536U (en) | Low-nitrogen gas burner | |
| CN215637167U (en) | Low-pressure low-heating value gas fuel and hydrogen mixing combustion device | |
| CN213930914U (en) | Combustion apparatus | |
| CN113251418A (en) | Low-nitrogen burner of acetylene device preheating furnace | |
| CN220269371U (en) | Heating furnace burner | |
| CN217004457U (en) | A gas-fired low-nitrogen burner with partially premixed high and low speed configuration | |
| CN217978872U (en) | Burner and boiler | |
| CN217875833U (en) | Flame-split high-speed low-nitrogen combustor | |
| CN217763419U (en) | Regional pure oxygen fractional combustion low NOx combustor | |
| CN214700691U (en) | Low-nitrogen burner of acetylene device preheating furnace | |
| CN211424389U (en) | Gas burner | |
| CN212657708U (en) | Multi-level air combustion-supporting ultralow-nitrogen burner | |
| CN213930926U (en) | Extract formula torch combustion system | |
| RU2230257C2 (en) | Device for burning gaseous fuel | |
| CN212362000U (en) | Oxygen-enriched low-nitrogen burner for boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |