CN106338081A - Dual-micro adjustable high-temperature flue gas ejector without receiving room - Google Patents
Dual-micro adjustable high-temperature flue gas ejector without receiving room Download PDFInfo
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- CN106338081A CN106338081A CN201610953874.8A CN201610953874A CN106338081A CN 106338081 A CN106338081 A CN 106338081A CN 201610953874 A CN201610953874 A CN 201610953874A CN 106338081 A CN106338081 A CN 106338081A
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- flue gas
- temperature flue
- pipe
- ejector
- temperature
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 239000003546 flue gas Substances 0.000 title claims abstract description 115
- 239000001301 oxygen Substances 0.000 claims abstract description 68
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 68
- 239000007789 gas Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 32
- 239000000428 dust Substances 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 8
- 206010021143 Hypoxia Diseases 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 208000018875 hypoxemia Diseases 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 17
- 238000002156 mixing Methods 0.000 abstract description 16
- 238000012546 transfer Methods 0.000 abstract description 8
- 239000007921 spray Substances 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000004056 waste incineration Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 23
- 239000007924 injection Substances 0.000 description 23
- 239000011449 brick Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 9
- 230000008676 import Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000004927 clay Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000001146 hypoxic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
- F23L17/16—Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2700/00—Installations for increasing draught in chimneys; Specific draught control devices for locomotives
- F23L2700/001—Installations for increasing draught in chimneys
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention belongs to high-temperature flue gas ejectors, and specifically discloses a dual-micro adjustable high-temperature flue gas ejector without a receiving room, and the dual-micro adjustable high-temperature flue gas ejector provides high-temperature low-oxygen combustion-supporting air to combustion equipment such as a boiler, especially a waste incineration boiler and an industrial furnace kiln. The dual-micro adjustable high-temperature flue gas ejector comprises a working air tube, a spray nozzle, a rail tube, a high-temperature flue gas inlet tube, a high-temperature flue gas ring-seam channel and a mixed high-temperature low-oxygen air output taper tube. According to the dual-micro adjustable high-temperature flue gas ejector disclosed by the invention, a receiving room structure in a conventional ejector is removed, so that working air with certain temperature and ultra-high-temperature flue gas do not have a heat transfer opportunity by contact before being ejected and mixed, and therefore, approximate isentropic flow of gas is ensured; an axial position dimension of an outlet of the spray nozzle is changed by regulating an axial position, in the rail tube, of the working air tube through a screw, so that high-temperature air with low oxygen volume concentration is obtained, and therefore, combustion needs of high energy saving and ultra-low pollution discharge are met. The dual-micro adjustable high-temperature flue gas ejector is simple in structure, is reliable in performance and can be applied to ejecting mixing or ejecting recycling field of other gas.
Description
Technical Field
The invention relates to an ultrahigh-temperature flue gas ejector, in particular to a double-micro adjustable high-temperature flue gas ejector without a receiving chamber.
Background
At present, primary air combusted by a boiler is pure oxygen air which is overheated at normal temperature or indirectly. Because the high-temperature flue gas and the total-oxygen normal-temperature air are mixed, not only can a very high temperature be obtained, but also the volume concentration of oxygen in the air can be properly reduced, the fuel, particularly the low-heat value fuel, can be fully combusted and burned out under the condition of a lower excess air coefficient, and the effects of energy conservation and low pollution emission are achieved at the same time.
The high-temperature low-oxygen combustion technology with the temperature higher than 800 ℃ and the oxygen content volume concentration lower than 15% is applied, the strong turbulent combustion effect can be realized under the condition of ultralow excess air coefficient, the high-temperature zone is avoided, the fullness degree of flame of a hearth is greatly improved, the high homogenization of a temperature field and a pressure field in the hearth is realized, the full combustion and burnout of fuel are facilitated, the heat transfer is facilitated, the high energy conservation of low-heat-value fuel and the normal combustion of ultralow pollutant emission are particularly facilitated, the domestic garbage incineration power generation boiler with the large excess air coefficient has strong advantages, and the burning loss of heating elements can be obviously reduced and the product quality is improved for industrial furnaces such as steel furnaces and heat treatment furnaces. Therefore, the high-temperature low-oxygen combustion is the international novel combustion technology with the best energy-saving and environment-friendly benefits, and is the best energy-saving and environment-friendly combustion technology for all fuel type boilers, particularly domestic garbage incineration power generation boilers and various fuel type industrial furnaces.
However, the core problem in the high-temperature low-oxygen combustion technology is how to generate an economically effective high-temperature low-oxygen air source, and this problem is the biggest bottleneck in the development and popularization of the technology, and has not been broken through so far. The high-temperature low-oxygen air which is first applied in an industrial furnace mainly has the following approaches: 1. the combustion-supporting air is preheated to high temperature through the heat accumulator, and then nitrogen or carbon dioxide is added for diluting the volume concentration of oxygen, so that the large-scale industrial popularization and application cannot be realized due to the complexity, high cost and short overhaul period; 2. combustion-supporting air is heated to high temperature through a heat accumulator and is directly injected into the furnace at high speed, and the volume concentration of oxygen in a combustion area is diluted by the backflow of ultrahigh-temperature flue gas in a hearth by virtue of the entrainment effect of high-speed jet flow of the high-temperature combustion-supporting air; 3. the low-temperature oxygen-free or oxygen-free flue gas at the outlet of the induced draft fan at the tail part of the boiler is partially introduced into the inlet of the air blower, so that the air with low oxygen concentration can be obtained, but the temperature is not high enough, and the required high temperature is difficult to realize, so that the real high-temperature and low-oxygen combustion effect cannot be obtained.
Disclosure of Invention
The invention aims to solve the problems of complex process, high cost, small action range and incapability of popularization and application when a high-temperature low-oxygen air source is generated in the conventional high-temperature low-oxygen combustion technology.
In order to solve the technical problem, the invention provides a double-micro adjustable high-temperature flue gas ejector without a receiving chamber, which comprises an ejector shell and a working air pipe, wherein one end of the working air pipe is provided with a working air inlet flange, the working air pipe is provided with a linkage flange, and the other end of the working air pipe is provided with a nozzle; wherein,
a track pipe is further arranged outside the working air pipe, an end face flange is arranged outside the track pipe, and the end face flange is connected with the linkage flange through a screw rod;
the working air pipe is hermetically connected with the outer shell, a first through hole is formed in the outer wall of the outer shell, and the working air pipe penetrates through the first through hole and is communicated with the inner space of the outer shell; the outer wall of the outer shell is provided with a second through hole, and the outer shell is hermetically connected with the inner shell through the second through hole; the outer wall of the outer shell is provided with a third through hole, and the outer shell is hermetically connected with the refractory lining of the high-temperature flue gas inlet pipe through the third through hole; a fourth through hole is formed in the outer wall of the outer shell, and the outer shell is hermetically connected with the dust exhaust detection tube seat through the fourth through hole;
the outer shell and the inner shell are both arranged inside the ejector shell; the inner space of the outer shell, the outer space of the inner shell and the shell sealing filler at the joint of the outer shell and the inner shell form a high-temperature flue gas circular seam channel;
the outlet of the high-temperature flue gas circular seam channel is hermetically connected with a mixed high-temperature low-oxygen air output taper pipe through a sealing filler, and the inner space of the mixed high-temperature low-oxygen air output taper pipe is communicated with the high-temperature flue gas circular seam channel.
Furthermore, stepped through holes are symmetrically formed in the opposite sides of the position where the first through hole is located, and high-temperature smoke instrument tube seats are fixedly installed in the stepped through holes.
Furthermore, blind holes are symmetrically formed in the end plane of the inner shell, and the blind holes are matched with the inner shell position adjusting bolt assembly.
Further, still be provided with the working air instrument tube socket between work air inlet flange and the interlock flange, just the working air instrument tube socket weld in on the outer wall of working air pipe.
Furthermore, a mixed high-temperature low-oxygen air outlet flange and a mixed high-temperature low-oxygen air instrument tube seat are welded on the outer wall of the tail end of the mixed high-temperature low-oxygen air output taper tube.
Further, a nozzle outlet protective cover is welded at the outlet of the nozzle; nozzle outlet heat preservation concrete and nozzle outlet fireproof concrete are filled between the nozzle outlet protective cover and the nozzle; the nozzle is a tapered or gradually-reduced and gradually-expanded nozzle, the compression ratio of the nozzle is not less than 1.01, and the expansion ratio of the nozzle is not less than 1.03.
Furthermore, the inner surface of the track pipe is a stepped cylindrical surface, and a first fixed flange is arranged outside the track pipe; the end face flange is provided with a threaded hole, and the screw penetrates through the threaded hole to connect and fix the end face flange and the linkage flange; and the end face flange is also provided with a sealing pressure plate and an O-shaped sealing ring.
Further, the screw rod is of a manual back tightening structure or an electric screw rod structure.
Further, the ejector shell is cylindrical, wherein,
flanges with bolt holes are respectively arranged on two symmetrical end faces of the ejector shell, and the ejector shell is fixedly connected with the first end plate structure and the second end plate structure through the flanges with the bolt holes;
a nut used for adjusting the position of the shell is welded on the circumference of the ejector shell;
a high-temperature flue gas inlet pipe is welded at the top end of the ejector shell and is communicated with the high-temperature flue gas circumferential seam channel;
the bottom welding of ejector casing has the dust exhaust to detect the tube socket, the both sides symmetry of dust exhaust to detect the tube socket is provided with the ejector support, just the ejector support welds in the bottom of ejector casing.
Furthermore, a first mounting through hole which is convenient for a high-temperature flue gas instrument tube seat to penetrate through and is fixedly mounted with the stepped through hole is formed in the first end plate structure;
the first end plate structure also comprises a first end plate structure rigidity reinforcing rib arranged in the first end plate structure;
a first central hole with the same diameter as the track pipe is also formed in the center of the first end plate structure, fixed track pipe bolt assemblies are uniformly welded on the periphery of the first central hole, and the track pipe is tightly fixed with the first end plate structure through a plane sealing gasket and the fixed track pipe bolt assemblies;
the first end plate structure is tightly fixed with the ejector shell through a vacuum sealing gasket and a bolt assembly.
Furthermore, a second mounting through hole which is convenient for the inner shell position adjusting bolt assembly to pass through and is fixedly mounted with the blind hole is formed in the second end plate structure;
the second end plate structure also comprises a second end plate structure rigidity reinforcing rib arranged in the second end plate structure;
a second central hole matched with the diameter of the mixed high-temperature low-oxygen air output taper pipe is further formed in the center of the second end plate structure, and fixed taper pipe bolt assemblies are uniformly welded on the periphery of the second central hole;
the second end plate structure is tightly fixed with the ejector shell through a vacuum sealing gasket and a bolt assembly.
Further, high temperature flue gas import pipe adopts stainless steel material to make, the outer end welding of high temperature flue gas import pipe has the high temperature flue gas import flange, the outside of high temperature flue gas import pipe is equipped with high temperature flue gas import outside of tubes heat preservation, and the inboard is equipped with high temperature flue gas import pipe plastic material, the fire-resistant inside lining of high temperature flue gas import pipe in proper order, the fire-resistant inside lining of high temperature flue gas import pipe passes through the sealed sealing connection of pad of high temperature flue gas import pipe with the brick wall of shell body.
Further, an insulating layer is arranged on the outer side of the mixed high-temperature low-oxygen air output taper pipe; the mixed high-temperature low-oxygen air output taper pipe comprises a first equal-diameter pipe arranged at the starting end of the mixed high-temperature low-oxygen air output taper pipe and a second equal-diameter pipe arranged at the tail end of the mixed high-temperature low-oxygen air output taper pipe; wherein,
the starting end of the first equal-diameter pipe is hermetically connected with the high-temperature flue gas circular seam channel through a sealing filler;
the angle of the mixed gas output taper pipe is 6-15 degrees;
the welding has the second mounting flange on the mixed high temperature hypoxemia air output taper pipe, the mixed high temperature hypoxemia air output taper pipe passes through the sealed pad of plane, second mounting flange, fixed taper pipe bolt subassembly and the inseparable fixed of second end plate structure.
Further, ejector shell heat-insulating layers are arranged between the ejector shell and the outer shell and in the annular groove of the inner shell.
The technical scheme provided by the invention has the following beneficial effects: the axial position of the working air pipe in the track pipe can be adjusted through the screw, so that the axial position size of the nozzle outlet is changed, the injection coefficient of the injector is changed, the quantity of the high-temperature smoke and the temperature of mixed gas are injected, excessive heat transfer of the high-temperature smoke with large temperature difference and low-temperature air before injection mixing is effectively controlled, and approximate isentropic flow of the high-temperature smoke and the low-temperature air is ensured.
In addition, the comprehensive adjustment of the nut used for adjusting the position of the outer shell and the inner shell position adjusting bolt assembly arranged on the second end plate structure are welded on the periphery of the ejector shell, so that the concentricity of the channel center of the converging circular cross section formed by combining the outer shell, the inner shell and the shell sealing filler and the centers of the working air pipe, the nozzle and the rail pipe is ensured.
And finally, adopting a reliable heat preservation technology to facilitate the working air and the high-temperature injection flue gas to continuously flow in an isentropic manner before injection mixing and after injection mixing, and simultaneously adopting necessary field instruments and sensors and a PLC automatic control program with high response speed to track, so that combustion-supporting air with high-temperature and low-oxygen volume concentration meeting the requirements can be obtained even under the conditions that the expansion ratio is 1.03 and the compression ratio is 1.01 and is extremely tiny, and the method is used for high-temperature and low-oxygen combustion with high energy conservation and ultralow pollutant emission, or is used in the injection mixing or injection recovery field of other gases.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a double-micro-adjustable high-temperature flue gas ejector without a receiving chamber provided by the invention.
Fig. 2 is an assembly schematic of the working air tube of the present invention.
Fig. 3 is an assembly view of the rail pipe according to the present invention.
Fig. 4 is a schematic structural diagram of the outer shell according to the present invention.
Fig. 5 is a schematic structural view of the inner housing according to the present invention.
Fig. 6 is a schematic view of the assembly of the hybrid high-temperature low-oxygen air output taper pipe according to the present invention.
Description of reference numerals: 1. a working air inlet flange; 2. a working air instrument tube seat; 3. a working air pipe; 4. sealing the pressure plate; 5. a rail pipe; 6. a nozzle; 7. a high temperature flue gas instrument tube seat; 8. a first end plate stiffness stiffener; 9. a first endplate structure; 10. a vacuum gasket; 11. a bolt assembly; 12. an ejector housing; 13. an outer heat-insulating layer of the high-temperature flue gas inlet pipe; 14. a high-temperature flue gas inlet pipe; 15. a heat-insulating plastic material for the high-temperature flue gas inlet pipe; 16. a refractory lining of the high-temperature flue gas inlet pipe; 17. a sealing gasket of the high-temperature flue gas inlet pipe; 18. an outer housing; 19. an inner housing; 20. a second endplate structure; 21. an inner housing position adjustment bolt assembly; 22. a planar gasket; 23. a second fixed flange; 24. fixing the taper pipe bolt assembly; 25. a first diameter tube; 26. mixing high-temperature low-oxygen air and outputting the tapered pipe; 27. a second equal-diameter pipe; 28. the mixed high-temperature low-oxygen air is output outside the pipe for heat preservation; 29. mixing a high-temperature low-oxygen air outlet flange; 30. mixing a high-temperature low-oxygen air instrument tube seat; 31. the second end plate structure rigidity reinforcing rib; 32. sealing and filling; 33. an injector shell insulating layer; 34. a shell is sealed and filled; 35. a nut; 36. a dust discharge detection tube seat; 37. the high-temperature flue gas circular seam meets the cross section; 38. a nozzle outlet shield; 39. heat preservation concrete at the outlet of the nozzle; 40. an ejector bracket; 41. a high-temperature flue gas circular seam channel; 42. refractory concrete at the nozzle outlet; 43. a planar gasket; 44. a fixed track tube bolt assembly; 45. a screw; 46. an O-shaped sealing ring; 47. a linking flange; 48. an end face flange; 49. a first fixed flange; 50. a high temperature flue gas inlet flange; 18-1, a first via; 18-2, a second through hole; 18-3, a third via; 18-4, a fourth via; 19-1 and blind holes.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
At present, the generation routes of the high-temperature hypoxic air mainly comprise: 1. the combustion-supporting air is preheated to high temperature through the heat accumulator, and then nitrogen or carbon dioxide is added for diluting the volume concentration of oxygen, so that the large-scale industrial popularization and application cannot be realized due to the complexity, high cost and short overhaul period; 2. combustion-supporting air is heated to high temperature through a heat accumulator and is directly injected into the furnace at high speed, and the volume concentration of oxygen in a combustion area is diluted by the backflow of ultrahigh-temperature flue gas in a hearth by virtue of the entrainment effect of high-speed jet flow of the high-temperature combustion-supporting air; 3. the low-temperature oxygen-free or oxygen-free flue gas at the outlet of the induced draft fan at the tail part of the boiler is partially introduced into the inlet of the air blower, so that the air with low oxygen concentration can be obtained, but the temperature is not high enough, and the required high temperature is difficult to realize, so that the real high-temperature and low-oxygen combustion effect cannot be obtained.
Therefore, the invention provides a double-micro adjustable high-temperature flue gas ejector without a receiving chamber, which omits the receiving chamber in a conventional ejector, adopts a circular seam converging channel formed by combining an outer shell and an inner shell as an ultrahigh-temperature flue gas ejecting pipe, and thoroughly avoids the contact heat transfer between ultrahigh-temperature flue gas with large temperature difference and low-temperature air before ejection mixing; the axial position of the working air pipe 3 in the track pipe 5 can be adjusted through the screw 45, so that the axial position size of the outlet of the nozzle 6 is changed, the quantity of the injection high-temperature flue gas and the temperature of the mixed gas are changed, excessive heat transfer of the high-temperature flue gas with large temperature difference and the low-temperature air before injection mixing is effectively controlled, and the working air and the low-temperature air are enabled to respectively flow in an approximate isentropic manner before injection mixing; meanwhile, the reliable heat preservation technology is adopted, the injection mixed fluid continuously flows in an isentropic manner, necessary field instruments and sensors are adopted, and a PLC automatic control program with high response speed is adopted for tracking, so that combustion-supporting air with high temperature and low oxygen volume concentration meeting the requirements can be obtained even under the conditions that the expansion ratio is 1.03 and the compression ratio is 1.01 and is extremely small, and the injection mixed fluid is used for high-temperature low-oxygen combustion with high energy conservation and ultralow pollutant emission, or is used in the injection mixing or injection recovery field of other gases.
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1:
referring to fig. 1, a schematic structural diagram of a double-micro-adjustable high-temperature flue gas ejector without a receiving chamber includes an ejector shell 12 and a working air pipe 3, wherein one end of the working air pipe 3 is provided with a working air inlet flange 1, the working air pipe 3 is provided with an interlocking flange 47, and the other end of the working air pipe 3 is provided with a nozzle 6; wherein,
a track pipe 5 is further arranged outside the working air pipe 3, and as shown in fig. 3, an end face flange 48 is arranged outside the track pipe 5, and the end face flange 48 is connected with the linkage flange 47 through a screw 45;
the working air pipe 3 is hermetically connected with an outer shell 18, the outer shell 18 is an outer refractory clay special-shaped brick, and as shown in fig. 4, a first through hole 18-1 is formed in the outer wall of the outer shell 18, and the working air pipe 3 penetrates through the first through hole 18-1 and is communicated with the inner space of the outer shell 18; the outer wall of the outer shell 18 is also provided with a second through hole 18-2, and the outer shell 18 is hermetically connected with the inner shell 19 through the second through hole 18-2; the outer wall of the outer shell 18 is also provided with a third through hole 18-3, and the outer shell 18 is hermetically connected with a refractory lining 16 of a high-temperature flue gas inlet pipe through the third through hole 18-3; a fourth through hole 18-4 is further formed in the outer wall of the outer shell 18, and the outer shell 18 is hermetically connected with the dust exhaust detection pipe seat 36 through the fourth through hole 18-4;
the outer shell 18 and the inner shell 19 are both arranged inside the ejector shell 12, and the inner shell 19 is an inner refractory clay special-shaped brick; the inner space of the outer shell 18 and the outer space of the inner shell 19, and the shell sealing packing 34 at the joint of the outer shell 18 and the inner shell 19 form a high-temperature flue gas circular seam channel 41;
the outlet of the high-temperature flue gas circular seam channel 41 is hermetically connected with a mixed high-temperature low-oxygen air output taper pipe 26 through a sealing filler 32, and the inner space of the mixed high-temperature low-oxygen air output taper pipe 26 is communicated with the high-temperature flue gas circular seam channel 41.
Preferably, with reference to the structural schematic diagram of the outer shell shown in fig. 4, stepped through holes 18-5 are symmetrically arranged on opposite sides of the position of the first through hole 18-1 arranged on the outer wall of the outer shell 18, and the stepped through hole 18-5 is fixedly provided with the high-temperature flue gas instrument tube seat 7.
Preferably, in combination with the schematic structural diagram of the inner housing shown in fig. 5, blind holes 19-1 are symmetrically arranged on the end plane of the inner housing 19, and the blind holes 19-1 are adapted to the inner housing position adjusting bolt assembly 21.
Preferably, in combination with the assembly schematic diagram of the working air pipe shown in fig. 2, a working air instrument tube seat 2 is further disposed between the working air inlet flange 1 and the linking flange 47, and the working air instrument tube seat 2 is welded on the outer wall of the working air pipe 3.
Preferably, in combination with the assembly schematic diagram of the hybrid high-temperature low-oxygen air output taper pipe shown in fig. 6, a hybrid high-temperature low-oxygen air outlet flange 29 and a hybrid high-temperature low-oxygen air instrument tube seat 30 are welded on the outer wall of the tail end of the hybrid high-temperature low-oxygen air output taper pipe 26.
Preferably, the outlet of the nozzle 6 is welded with a nozzle outlet protection shield 38; and nozzle outlet heat-insulating concrete 39 and nozzle outlet refractory concrete 42 are filled between the nozzle outlet protective cover 38 and the nozzle 6.
Preferably, the inner surface of the track pipe 5 is a stepped cylindrical surface in order to reduce the resistance of the axial movement of the working air pipe 3, and a first fixed flange 49 is further arranged outside the track pipe 5; the end face flange 48 is provided with a threaded hole, and the screw 45 penetrates through the threaded hole to connect and fix the end face flange 48 and the linkage flange 47; the end face flange 48 is also provided with a sealing pressure plate 4 and an O-shaped sealing ring 46.
Preferably, the eductor housing 12 is cylindrical, wherein,
flanges with bolt holes are respectively arranged on two symmetrical end faces of the ejector shell 12, and the ejector shell 12 is fixedly connected with the first end plate structure 9 and the second end plate structure 20 through the flanges with the bolt holes;
a nut 35 for adjusting the position of the outer shell 18 is welded on the circumference of the ejector shell 12;
a high-temperature flue gas inlet pipe 14 is welded at the top end of the ejector shell 12, and the high-temperature flue gas inlet pipe 14 is communicated with the high-temperature flue gas circumferential seam channel 41;
the bottom welding of ejector casing 12 has dust exhaust to detect the tube socket 36, the both sides symmetry of dust exhaust to detect the tube socket 36 is provided with ejector support 40, just ejector support 40 welds in the bottom of ejector casing 12.
Preferably, the first end plate structure 9 is provided with a first mounting through hole which is convenient for the high-temperature flue gas instrument tube seat 7 to pass through and is fixedly mounted with the stepped through hole 18-5;
the first end plate structure 9 further comprises a first end plate structure rigidity reinforcing rib 8 arranged in the first end plate structure 9;
a first central hole with the same diameter as the track pipe 5 is further formed in the center of the first end plate structure 9, fixed track pipe bolt assemblies 44 are uniformly welded on the periphery of the first central hole, and the track pipe 5 is tightly fixed with the first end plate structure 9 through a plane sealing gasket 43 and the fixed track pipe bolt assemblies 44;
the first end plate structure 9 is tightly fixed with the ejector shell 12 through a vacuum sealing gasket 10 and a bolt assembly 11.
Preferably, the second end plate structure 20 is provided with a second mounting through hole for allowing the inner refractory clay profile brick position adjusting bolt assembly 21 to pass through and be fixedly mounted with the blind hole 19-1;
the second end plate structure 20 further comprises a second end plate structure rigidity reinforcing rib 31 arranged in the second end plate structure 20;
a second central hole matched with the diameter of the mixed high-temperature low-oxygen air output taper pipe 26 is further formed in the center of the second end plate structure 20, and fixed taper pipe bolt assemblies 24 are uniformly welded on the periphery of the second central hole;
the second end plate structure 20 is tightly fixed with the ejector shell 12 through the vacuum sealing gasket 10 and the bolt assembly 11.
Preferably, as shown in fig. 6, the mixed high temperature and low oxygen air output taper pipe 26 comprises a first equal-diameter pipe 25 disposed at the beginning of the mixed high temperature and low oxygen air output taper pipe 26, and a second equal-diameter pipe 27 disposed at the tail end of the mixed high temperature and low oxygen air output taper pipe 26; wherein,
the initial end of the first equal-diameter pipe 25 is hermetically connected with the high-temperature flue gas circular seam channel 41 through a sealing filler 32;
the angle of the mixed gas output taper pipe 26 is 6-15 degrees;
the welding has second mounting flange 23 on the mixed high temperature hypoxemia air output taper pipe 26, mixed high temperature hypoxemia air output taper pipe 26 is through sealed 22, second mounting flange 23 of plane, fixed taper pipe bolt assembly 24 and the inseparable fixed of second end plate structure 20.
Example 2:
on the basis of embodiment 1, high temperature flue gas inlet pipe 14 adopts stainless steel material to make, the outer end welding of high temperature flue gas inlet pipe 14 has high temperature flue gas inlet flange 50, the outside of high temperature flue gas inlet pipe 14 is equipped with high temperature flue gas inlet outside of tubes heat preservation 13, and the inboard is equipped with high temperature flue gas inlet pipe plastic material 15, high temperature flue gas inlet pipe refractory lining 16 in proper order, high temperature flue gas inlet pipe refractory lining 16 with the brick wall of shell body 18 passes through the sealed pad 17 sealing connection of high temperature flue gas inlet pipe.
Example 3:
on the basis of embodiment 1, preferably, an insulating layer 28 is arranged on the outer side of the mixed high-temperature low-oxygen air output taper pipe 26, so that the contact heat transfer between the injection fluid and the external atmosphere in the flowing process is reduced, and the injected mixed fluid is ensured to continue to flow approximately in an isentropic manner.
Example 4:
on the basis of embodiment 1, preferably, the outer shell 18 is an outer fire clay special-shaped brick, the inner shell 19 is an inner fire clay special-shaped brick, and ejector shell insulating layers 33 are respectively arranged between the ejector shell 12 and the outer fire clay special-shaped brick and in ring grooves of the inner fire clay special-shaped brick, so that the working fluid and the ejection fluid are ensured to respectively flow in an isentropic manner before being mixed by ejection.
Example 5:
in example 1, the nozzle 6 is a tapered or tapered/divergent nozzle, the compression ratio of the nozzle 6 is not less than 1.01, and the expansion ratio of the nozzle 6 is not less than 1.03.
Example 6:
on the basis of the embodiment 1, the screw rod 45 is of a manual tightening structure for on-site adjustment or of an electric screw rod structure for remote automatic adjustment.
The double-micro-adjustable high-temperature flue gas ejector without the receiving chamber is combined with the structural schematic diagram of the double-micro-adjustable high-temperature flue gas ejector without the receiving chamber shown in figure 1, and the working principle is as follows: working air enters the working air pipe 3 from the working air inlet flange 1, the pressure of the working air meets the design requirement, the pressure energy is converted into speed energy at the outlet of the nozzle 6, and negative pressure with a certain numerical value is generated; meanwhile, high-temperature flue gas from the hearth enters from the high-temperature flue gas inlet pipe 14 of the ejector and flows to the high-temperature flue gas circular seam channel 41 to reach the outlet of the nozzle 6, when the pressure at the outlet of the nozzle 6 is low enough, the high-temperature flue gas continuously flows to the position from the high-temperature hearth and enters the cylindrical channel behind the junction 37 of the high-temperature flue gas circular seam channels together with working air at normal temperature or with certain preheating temperature; at the front end of the taper pipe 26, relatively uniform high-temperature low-oxygen air is formed, the pressure of the air is slightly reduced than that at the outlet of the nozzle 6, and when the high-temperature low-oxygen air passes through the taper pipe 26, the pressure is gradually increased due to the gradual reduction of the speed; the axial position of the working air pipe 3 in the track pipe 5 can be adjusted through the screw 45, so that the axial position size of the outlet of the nozzle 6 is changed, namely the distance A between the axial direction of the outlet of the nozzle 6 and the converging section 37 of the high-temperature flue gas circumferential seam is adjusted, namely the injection coefficient is changed, namely the temperature and the oxygen content volume concentration of the mixed air are changed; in addition, the pressure of the effluent gas at the mixed high temperature low oxygen air outlet flange 29 is varied by varying the taper of the mixed high temperature low oxygen air output taper 26.
Therefore, by changing relevant parameters, the double-micro adjustable high-temperature flue gas ejector without the receiving chamber can provide different parameters, and the annular seam converging channel formed by combining the outer shell and the inner shell is used as a high-temperature flue gas ejecting pipe, so that the contact heat transfer between high-temperature flue gas with large temperature difference and low-temperature air before ejection mixing is thoroughly avoided; the axial position of the working air pipe 3 in the track pipe 5 can be adjusted through the screw 45, so that the axial position size of the outlet of the nozzle 6 is changed, the quantity of the injection high-temperature flue gas and the temperature of the mixed gas are changed, excessive heat transfer of the high-temperature flue gas with large temperature difference and the low-temperature air before injection mixing is effectively controlled, and the working air and the low-temperature air are enabled to respectively flow in an approximate isentropic manner before injection mixing; meanwhile, the reliable heat preservation technology is adopted, so that the injection mixed gas continues to flow in an isentropic manner, and meanwhile, necessary field instruments and sensors and a PLC (programmable logic controller) automatic control program with high response speed are adopted for tracking, so that combustion-supporting air with high temperature and low oxygen volume concentration meeting the requirements can be obtained even under the conditions that the expansion ratio is 1.03 and the compression ratio is 1.01 and is extremely small, and the injection mixed gas is used for high-temperature low-oxygen combustion with high energy conservation and ultralow pollutant emission, or is used in the injection mixing or injection recovery field of other gases.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims. With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Claims (14)
1. The double-micro-adjustable high-temperature flue gas ejector without the receiving chamber is characterized by comprising an ejector shell (12) and a working air pipe (3), wherein a working air inlet flange (1) is arranged at one end of the working air pipe (3), a linkage flange (47) is arranged on the working air pipe (3), and a nozzle (6) is arranged at the other end of the working air pipe (3); wherein,
a rail pipe (5) is further arranged outside the working air pipe (3), an end face flange (48) is arranged outside the rail pipe (5), and the end face flange (48) is connected with the linkage flange (47) through a screw rod (45);
the working air pipe (3) is connected with an outer shell (18) in a sealing mode, a first through hole (18-1) is formed in the outer wall of the outer shell (18), and the working air pipe (3) penetrates through the first through hole (18-1) and is communicated with the inner space of the outer shell (18); the outer wall of the outer shell (18) is also provided with a second through hole (18-2), and the outer shell (18) is hermetically connected with the inner shell (19) through the second through hole (18-2); the outer wall of the outer shell (18) is also provided with a third through hole (18-3), and the outer shell (18) is hermetically connected with a refractory lining (16) of a high-temperature flue gas inlet pipe through the third through hole (18-3); the outer wall of the outer shell (18) is also provided with a fourth through hole (18-4), and the outer shell (18) is hermetically connected with a dust exhaust detection pipe seat (36) through the fourth through hole (18-4);
the outer shell (18) and the inner shell (19) are both arranged inside the ejector shell (12); the inner space of the outer shell (18), the outer space of the inner shell (19) and the shell sealing filler (34) at the joint of the outer shell (18) and the inner shell (19) form a high-temperature flue gas circular seam channel (41);
the outlet of the high-temperature flue gas circular seam channel (41) is hermetically connected with a mixed high-temperature low-oxygen air output taper pipe (26) through a sealing filler (32), and the inner space of the mixed high-temperature low-oxygen air output taper pipe (26) is communicated with the high-temperature flue gas circular seam channel (41).
2. The double-micro-adjustable high-temperature smoke ejector without the receiving chamber as claimed in claim 1, wherein stepped through holes (18-5) are symmetrically arranged on the opposite sides of the position of the first through hole (18-1), and a high-temperature smoke instrument tube seat (7) is fixedly installed on the stepped through holes (18-5).
3. The double-micro-adjustable high-temperature flue gas ejector without the receiving chamber as claimed in claim 1, wherein blind holes (19-1) are symmetrically arranged on the end plane of the inner shell (19), and the blind holes (19-1) are matched with an inner shell position adjusting bolt assembly (21).
4. The double-micro-adjustable high-temperature flue gas ejector without the receiving chamber as claimed in claim 1, wherein a working air instrument tube seat (2) is further arranged between the working air inlet flange (1) and the linkage flange (47), and the working air instrument tube seat (2) is welded on the outer wall of the working air tube (3).
5. The double-micro-adjustable high-temperature smoke ejector without the receiving chamber as claimed in claim 1, wherein a mixed high-temperature low-oxygen air outlet flange (29) and a mixed high-temperature low-oxygen air instrument tube seat (30) are welded on the outer wall of the tail end of the mixed high-temperature low-oxygen air output taper tube (26).
6. The double micro-adjustable high-temperature flue gas ejector without a receiving chamber of claim 1, wherein a nozzle outlet protective cover (38) is welded to an outlet of the nozzle (6); nozzle outlet heat preservation concrete (39) and nozzle outlet refractory concrete (42) are filled between the nozzle outlet protective cover (38) and the nozzle (6); the nozzle (6) is a tapered or gradually-tapered and gradually-expanded nozzle, the compression ratio of the nozzle (6) is not less than 1.01, and the expansion ratio of the nozzle (6) is not less than 1.03.
7. The double-micro adjustable high-temperature flue gas ejector without the receiving chamber as claimed in claim 1, wherein the inner surface of the track pipe (5) is a stepped cylindrical surface, and a first fixed flange (49) is further arranged outside the track pipe (5); the end face flange (48) is provided with a threaded hole, and the screw rod (45) penetrates through the threaded hole to connect and fix the end face flange (48) and the linkage flange (47); and the end face flange (48) is also provided with a sealing pressure plate (4) and an O-shaped sealing ring (46).
8. The double micro-adjustable high-temperature flue gas ejector without the receiving chamber as claimed in claim 1, wherein the screw (45) is of a manual back tightening structure or an electric screw structure.
9. The double micro-adjustable high temperature flue gas eductor without a receiving chamber as defined in claim 1 wherein the eductor housing (12) is cylindrical in shape,
flanges with bolt holes are respectively arranged on two symmetrical end faces of the ejector shell (12), and the ejector shell (12) is fixedly connected with the first end plate structure (9) and the second end plate structure (20) through the flanges with the bolt holes;
a nut (35) used for adjusting the position of the outer shell (18) is welded on the circumference of the ejector shell (12);
a high-temperature flue gas inlet pipe (14) is welded at the top end of the ejector shell (12), and the high-temperature flue gas inlet pipe (14) is communicated with the high-temperature flue gas circumferential seam channel (41);
the bottom welding of ejector casing (12) has dust exhaust to detect tube socket (36), the both sides symmetry of dust exhaust to detect tube socket (36) is provided with ejector support (40), just ejector support (40) weld in the bottom of ejector casing (12).
10. The double micro-adjustable high temperature flue gas eductor without a receiving chamber of claim 9,
a first mounting through hole which is convenient for a high-temperature flue gas instrument tube seat (7) to pass through and is fixedly mounted with the stepped through hole (18-5) is formed in the first end plate structure (9);
the first end plate structure (9) further comprises a first end plate structure rigidity reinforcing rib (8) arranged in the first end plate structure (9);
a first central hole with the same diameter as the track pipe (5) is further formed in the center of the first end plate structure (9), fixed track pipe bolt assemblies (44) are uniformly welded on the periphery of the first central hole, and the track pipe (5) is tightly fixed with the first end plate structure (9) through a plane sealing gasket (43) and the fixed track pipe bolt assemblies (44);
the first end plate structure (9) is tightly fixed with the ejector shell (12) through a vacuum sealing gasket (10) and a bolt assembly (11).
11. The double micro-adjustable high temperature flue gas eductor without a receiving chamber of claim 9,
the second end plate structure (20) is provided with a second mounting through hole which is convenient for the inner shell position adjusting bolt assembly (21) to pass through and is fixedly mounted with the blind hole (19-1);
the second end plate structure (20) further comprises a second end plate structure rigidity reinforcing rib (31) arranged in the second end plate structure (20);
a second central hole matched with the diameter of the mixed high-temperature low-oxygen air output taper pipe (26) is further formed in the center of the second end plate structure (20), and fixed taper pipe bolt assemblies (24) are uniformly welded on the periphery of the second central hole;
the second end plate structure (20) is tightly fixed with the ejector shell (12) through a vacuum sealing gasket (10) and a bolt assembly (11).
12. The double-micro adjustable high-temperature flue gas ejector without the receiving chamber as claimed in any one of claims 1 to 11, wherein the high-temperature flue gas inlet pipe (14) is made of stainless steel material, the outer end of the high-temperature flue gas inlet pipe (14) is welded with a high-temperature flue gas inlet flange (50), the outer side of the high-temperature flue gas inlet pipe (14) is provided with an outer high-temperature flue gas inlet pipe heat-insulating layer (13), the inner side of the high-temperature flue gas inlet pipe heat-insulating layer is sequentially provided with a high-temperature flue gas inlet pipe heat-insulating plastic material (15) and a high-temperature flue gas inlet pipe fire-resistant lining (16), and the high-temperature flue gas inlet pipe fire-resistant.
13. The double micro-adjustable high-temperature flue gas ejector without the receiving chamber as claimed in any one of claims 1 to 11, wherein an insulating layer (28) is arranged outside the mixed high-temperature low-oxygen air output taper pipe (26); the mixed high-temperature low-oxygen air output taper pipe (26) comprises a first equal-diameter pipe (25) arranged at the initial end of the mixed high-temperature low-oxygen air output taper pipe (26) and a second equal-diameter pipe (27) arranged at the tail end of the mixed high-temperature low-oxygen air output taper pipe (26); wherein,
the starting end of the first constant-diameter pipe (25) is hermetically connected with the high-temperature flue gas circular seam channel (41) through a sealing filler (32);
the angle of the mixed gas output taper pipe (26) is 6-15 degrees;
the welding has second mounting flange (23) on mixed high temperature hypoxemia air output taper pipe (26), mixed high temperature hypoxemia air output taper pipe (26) are through sealed pad of plane (22), second mounting flange (23), fixed taper pipe bolt assembly (24) and second end plate structure (20) closely fixed.
14. The double micro-adjustable high-temperature flue gas ejector without the receiving chamber as claimed in any one of claims 1 to 11, wherein an ejector shell insulating layer (33) is arranged between the ejector shell (12) and the outer shell (18) and in an annular groove of the inner shell (19).
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| CN201610953874.8A CN106338081B (en) | 2016-11-03 | 2016-11-03 | A kind of double micro- adjustable high temperature flue gas ejectors of no receiving chamber |
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