CN101062882A - Ethylene cracking furnace with two-stroke radiation furnace tube - Google Patents
Ethylene cracking furnace with two-stroke radiation furnace tube Download PDFInfo
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- CN101062882A CN101062882A CN 200710097705 CN200710097705A CN101062882A CN 101062882 A CN101062882 A CN 101062882A CN 200710097705 CN200710097705 CN 200710097705 CN 200710097705 A CN200710097705 A CN 200710097705A CN 101062882 A CN101062882 A CN 101062882A
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Abstract
The invention discloses an ethylene cracking furnace with two range radiant section furnace tube, which is characterized by the following: comprising high pressure steam drum, convection section, radiant section furnace tube, combustor, radiant section and chill boiler; comprising two induction pipe, forked tube, first range low section pipe, connecting pipe and second range furnace tube of 2/1-1 type two range vertical furnace pipe; forming finite angle of the two induction pipe plan and the two range furnace tube plan. This invention can be used to ethylene installation.
Description
Technical field
The present invention relates to pyrolyzer, be specifically related to be used for the pyrolyzer that alkene is produced in petroleum cracking.
Background technology
In ethylene unit, pyrolyzer is a nucleus equipment.The design of radiant coil is a decision cracking selectivity, improves cracking product olefin yields and improves the adaptive key of different cracking stocks.Improve the structure of radiant coil, become part most crucial in the tube cracking furnace technical development.Over more than 20 year, single branch adapter bonnet, mixing branch adapter bonnet, the radiant coil of different structure such as branch's adapter bonnet, the isometrical pipe of one way have not appearred in succession.
For making raw material consumption reduce, keep suitable running period greatly and having adaptability to raw material preferably, present most of company all adopts two journeys, and (18～28m) branch's reducings or two journeys are branch's reducing highly selective boiler tube not, will the residence time be controlled at 0.15～0.25s.The first Cheng Caiyong minor diameter boiler tube utilizes the big characteristics of its specific surface area to reach the purpose that is rapidly heated, and the larger-diameter boiler tube of second Cheng Caiyong is to reduce the influence to coking susceptibility.The two journey highly selective radiant coils that adopted have boiler tubes such as 1-1 type (U type), 2-1 type, 4-1 type, 5-1 type, 6-1 type, 8-1 type.The short residence time(SRT) of highly selective boiler tube is less than the one way minor diameter boiler tube (millisecond boiler tube) of 0.1s, because its specific surface area maximum, heat-up rate is fast, and cracking temperature is the highest, so selectivity is the highest.
Since 20th century eight, the nineties, appearance along with the megaton ethylene unit, the large-scale pyrolyzer technology that is complementary with it also is greatly developed, at present build tens single stove ethene yearly capacities in the world and reached large-scale pyrolyzer more than 100,000 tons, 180,000 tons/year of up (liquid starting material).The advantage of large-scale pyrolyzer is: (1) can save about investment of about 10%; (2) because stove platform number reduces, be convenient to management and maintenance; (3) floor space also can correspondingly reduce.
Pyrolyzer maximizes different with the maximization of other devices and equipment, and the ability that improves pyrolyzer realizes by increasing radiant coil quantity.After but radiant coil increased, pyrolyzer radiation section length is corresponding also to be increased.How can improve the ability of pyrolyzer under the situation that does not increase burner hearth length, be an approach that realizes maximization.1-1 type (U type) two journey boiler tubes have bigger specific surface area, have mechanical property preferably, but the cycle of operation is shorter than other two journeys boiler tubes.2-1 type two journey boiler tubes have bigger specific surface area, will grow but compare radiation section burner hearth length with 1-1 type boiler tube.
The arrangement mode of boiler tube doublely develops into singlely from initial, adopts double now again.For single, identical ability needs bigger floor space, and its advantage is the circumferential uniformity of temperature profile of boiler tube, exists the situation of covering less; For double, dwindled the floor space of pyrolyzer greatly, but the situation of covering is more serious, influenced the circumferential temperature distribution of boiler tube (having increased the ununiformity that the radiating furnace tube wall temperature circumferentially distributes).
The first journey pipe that the boiler tube arrangement mode often adopts and the second journey pipe are concentrated respectively and are arranged, because the burner load of arranging in the burner hearth is identical, and the first journey pipe and second journey pipe absorption heat are had any different, thereby temperature distributing disproportionation in the pyrolyzer burner hearth.
Summary of the invention
The technical problem to be solved in the present invention is:
At the deficiencies in the prior art, the deficiency of avoid that the 1-1 type boiler tube first journey heat transfer area is little, the material heating is slow avoids the 2-1 type boiler tube unbalanced stress that is heated even again, the weakness of bad mechanical property.The invention provides a kind of ethane cracking furnace of two-range radiant section boiler tube, improve heat-transfer effect, when yield is identical, can improve the cycle of operation, can improve yield of ethene in the cycle of operation when identical and improve processing performance, prolong the boiler tube life-span than existing 1-1 type boiler tube; Improve mechanical property than existing 2-1 type boiler tube simultaneously, not flexible when boiler tube is heated, prolong the boiler tube life-span, when burner hearth length is identical, the more radiating furnace tube of arranging, the cumulative volume of minimizing radiation section burner hearth.
Technical scheme of the present invention is:
A kind of ethane cracking furnace of two-range radiant section boiler tube, this ethane cracking furnace comprises: high pressure drum 1, convection zone 2, radiant coil 3, burner 4, radiation section 5, quenching boiler 6; And other conventional components that pyrolyzer had.
Described each radiant coil 3 is two journey vertical furnace tubes, and this two journeys vertical furnace tube comprises: the first journey boiler tube 10, pipe connecting 20, the second journey boiler tube 30;
The described first journey boiler tube 10 comprises: two inlet pipes 11, Y-tube 12, the first journey hypomere pipe 13.
The boiler tube of this pattern is called 2/1-1 type boiler tube, i.e. two inlet pipes, first a journey hypomere pipe, second a journey boiler tube.2/1-1 type boiler tube has been taken into account 1-1 type boiler tube good mechanical property, the good advantage of 2-1 type boiler tube processing performance.
The epimere of the described first journey boiler tube 10 is two inlet pipes 11; Fixedly connected with two inlets of Y-tube 12 upper ends respectively in the lower end of each inlet pipe 11; An outlet is converged in the lower end of Y-tube 12, and this outlet is fixedlyed connected with the upper end of the first journey hypomere pipe 13; Fixedly connected with the inlet of pipe connecting 20 in the lower end of the first journey hypomere pipe 13; The outlet of pipe connecting 20 is fixedlyed connected with the lower end of the second journey boiler tube 30;
The said fixing connection is generally welding, is the routine techniques in the pyrolyzer manufacturing processed.
Material enters from the upper end of inlet pipe 11, through the first journey hypomere pipe 13, pipe connecting 20, flows out radiant coil from the upper end of the second journey boiler tube 30;
Two inlet pipes 11 and the first journey hypomere pipe 13 arrange vertically that all the medullary ray of the first journey hypomere pipe 13 is first journey medullary rays, and two inlet pipes 11 are arranged in the first journey medullary ray zygomorphy; The second journey boiler tube 30 arranges that vertically the medullary ray of the second journey boiler tube 30 is second journey medullary rays; The plane that the first journey medullary ray and the second journey medullary ray constitute is two journey boiler tube plane A, and described two journey boiler tube plane A are vertical planes; Vertical plane perpendicular to two journey boiler tube plane A is the two face B of journey boiler tube lateral projection;
Alleged herein vertical layout be meant on the engineering significance vertically, be that boiler tube is vertical layout, but not vertical strict on the mathematical meaning, because installation error on the engineering and the thermal distortion under the user mode, the medullary ray of each boiler tube and plummet be angle in fact more slightly, and this and technical scheme of the present invention are still and are equal to.
The medullary ray of described pipe connecting 20 is three-dimensional U spirrillums; The projection of described pipe connecting 20 medullary rays on the two face B of journey boiler tube lateral projection is symmetric closed curve, and this medullary ray drop shadow curve begins difference both sides downwards from upper extreme point and extends, and converges to lower extreme point through arc curve; The projection of described pipe connecting 20 medullary rays on two journey boiler tube plane A is symmetric;
The drop shadow curve of described pipe connecting 20 medullary rays on the B of projection plane can have multi-form, and for example: top is two oblique lines, circular arc line etc., and the lower section is circular arc, para-curve, hyperbolic line, involute urve, tractrix, cycloid etc.; And the combination of above-mentioned various straight line, curve, and be not limited to other various straight lines of above-mentioned straight line, curve, the combination of curve.Specifically see Fig. 6, Fig. 7.
Two medullary rays of described two inlet pipes 11 constitute inlet pipe plane C, and described inlet pipe plane C is a vertical guide; Inlet pipe plane C and two journey boiler tube plane A are the angle of 0 degree to 90 degree.
Promptly when arranging inlet pipe, can make that inlet pipe was not concentrated on the straight line when a plurality of 2/1-1 type boiler tubes were arranged in groups to the line at two inlet pipe centers on vertical view twisting certain angle.Like this can conserve space, the cumulative volume of whole pyrolyzer is reduced, and then save floor space and investment.
Radiant section furnace tube bank 40 comprises odd number radiant coil 3; In each radiant section furnace tube bank 40: the first journey medullary ray and the second journey medullary ray of each radiant coil 3 all are arranged in the same vertical plane, and this vertical plane is tube bank central plane D;
A kind of situation is, when comprising the above odd number radiant coil 3 of three or three in radiant section furnace tube bank 40, in this radiant section furnace tube bank 40: the first journey medullary ray of a radiant coil 3 and the second journey medullary ray of another radiant coil 3 are arranged in successively restrains in the central plane D; In other words, the first journey medullary ray of the second journey medullary ray of a radiant coil 3 and another radiant coil 3 is arranged in the tube bank central plane D successively.According to the first journey medullary ray and the second journey medullary ray all the other each radiant coils 3 that are intervally arranged, until the first journey medullary ray of the last radiant coil 3 of arranging; And then another radiant coil 3 second journey medullary rays of arranging, and according to the first journey medullary ray and the second journey medullary ray all the other each radiant coils 3 that are intervally arranged, until the second journey medullary ray of the last radiant coil 3 of arranging.Also can ranked second the journey boiler tube earlier and ranked first the journey boiler tube again.
In this case, a plurality of radiant coils 3 are formed a radiant section furnace tube bank, comprise a radiant section furnace tube bank in the pyrolyzer at least.In a nest of boiler tube, the first journey boiler tube and the second journey boiler tube are staggered, and specifically see shown in Figure 9.Need for arranging, the boiler tube quantity of a nest of boiler tube should be odd number, as 3,5,7,9,11,13,15, so that more (under feasible situations on the engineering).Between the first journey medullary ray and the second journey medullary ray of same radiant coil 3, be furnished with the first journey medullary ray and the second journey medullary ray of other boiler tubes, from vertical view, a part of boiler tube is that a left side is entered the right side and gone out, another part boiler tube is that the right side is entered a left side and gone out.
Another kind of situation is, can have only a radiant coil in that radiant coil is intrafascicular the most after a little while, and must contain a plurality of this special nests of boiler tube that only contain single tube in a pyrolyzer this moment.
Also promptly when including only a radiant coil 3 in the radiant section furnace tube bank 40, in pyrolyzer: the first journey medullary ray of a radiant coil 3 is adjacent with the second journey medullary ray, and then the first journey medullary ray of another radiant coil 3 of arranging successively and the second journey medullary ray; The first journey medullary ray of each radiant coil 3 and the second journey medullary ray are all in tube bank central plane D.
It is each radiant coil 3 adjacent layout.At this moment the inlet pipe of first boiler tube is adjacent with the outlet pipe of oneself, and then the inlet pipe and the outlet pipe of second boiler tube of arranging, between the first journey medullary ray and the second journey medullary ray of same radiant coil 3, there be not the first journey medullary ray or the second journey medullary ray of other boiler tubes.Specifically see Figure 11, shown in Figure 12.From vertical view, all boiler tubes all are that a left side is entered a left side and gone out, or all are that the right side is entered the right side and gone out.At this moment, the inlet pipe of a boiler tube is adjacent with the outlet pipe of another boiler tube, and the inlet section of radiant coil and outlet section remain staggered.
Key point of the present invention is: (1) is compared with 1-1 type boiler tube, adopts 2/1-1 type boiler tube, has improved processing performance, makes under same yield, has reduced furnace wall temperature, thereby has prolonged the cycle of operation; Or under the same cycle, improved yield.Pipe connecting between (2) two journeys adopts the three-dimensional U spirrillum, can absorb thermal stresses, reduces the crooking of the tubes, reduces local superheating, prolongs the cycle of operation, prolongs the boiler tube life-span.(3) boiler tube inlet section and outlet section staggered arrangement make boiler tube be heated evenly, and can reduce the outlet section wall temperature, under same treatment capacity and yield condition, prolong the cycle of operation.
In industrial application, the technical program can have various concrete preferred versions:
In described each radiant coil 3, along material from the upstream downstream, the cross section total area is more than or equal to the cross section total area in the pipe of upstream in the pipe in radiant coil 3 downstreams, and cross-sectional area is greater than cross-sectional area summation in the pipe of this boiler tube entrance end in the pipe of radiant coil exit end.
Promptly adopt the reducing boiler tube, reducing is the reducing mode that cross-sectional area strengthens in the pipe, it is the interior cross-sectional area sum of pipe of two boiler tubes of boiler tube entrance end, it is cross-sectional area minimum in the whole boiler tube, material flows along the boiler tube downstream, and cross-sectional area can not reduce, and only can increase or constant, to the boiler tube exit end, cross-sectional area is bound to increase in the upper port pipe of the second journey boiler tube 30.Reducing can have various ways, and the first journey boiler tube, pipe connecting and the second journey boiler tube can reducings, and reducing continuously also can the staged reducing.
Described pipe connecting 20 comprises three parts: pipe connecting inlet section 21, pipe connecting stage casing 22, pipe connecting outlet section 23; Described pipe connecting stage casing 22 is one section bend pipe, is in the plane, and this bend pipe is semicircle, part circular, ellipse or parabola shaped.Usually, pipe connecting inlet section 21 and pipe connecting outlet section 23 are symmetric.The medullary ray of pipe connecting 20 is three-dimensional U spirrillums, and promptly pipe connecting inlet section 21 and pipe connecting outlet section 23 might not be in the plane, also not necessarily is in the plane with pipe connecting stage casing 22.
The length of the inlet pipe 11 of the described first journey boiler tube is 10%～80% of the first journey boiler tube total length, preferably 20%～60%.
Usually, the inside diameter ranges of described inlet pipe 11 is 30mm～60mm, preferred 35mm～55mm.
The inside diameter ranges of the described first journey hypomere pipe 13 is 40mm～80mm, preferred 50mm～70mm.
The inside diameter ranges of the described second journey boiler tube 30 is 50mm～100mm, preferred 55mm～80mm.
Usually, described inlet pipe plane C and two journey boiler tube plane A are 30 degree to 60 degree angles.Preferred 45 degree angles.
As special case, can also be that described inlet pipe plane C and two journey boiler tube plane A are 0 degree angle, and inlet pipe plane C overlap with two journey boiler tube plane A.
Common radiant section furnace tube bank 40 is made up of 1,3,5,7,9,11 or 13 radiant coils 3.The example of arranging is seen accompanying drawing 8, Fig. 9.
Generally speaking, the radiation section burner hearth of ethane cracking furnace contains a plurality of radiant section furnace tube banks 40.For example there are 2,3,4,5,6,7,8,9,10, restrain down to more a plurality of radiant section furnaces.
Can add enhanced heat transfer component in the boiler tube.
Enhanced heat transfer component can be various known or known elements not, as flight plug-in part, twisted strip plug-in part, intersect zig-zag plug-in part, coil core plug-in part, lap-ups silk porous insert, spherical matrix plug-in part etc., is beneficial to conduct heat.Also can add different enhanced heat transfer components respectively in the different piece of boiler tube.
When industrial application, the concrete parameter of pyrolyzer of the present invention, as: the length of boiler tube, caliber, boiler tube quantity etc., determine according to conditions such as feedstock property, pyrolyzer abilities.
The invention has the beneficial effects as follows:
Pyrolyzer of the present invention can be under the identical situation of ability, the pyrolyzer floor space is littler, the processing performance and the mechanical property of boiler tube are taken into account, improve heat-transfer effect than existing 1-1 type boiler tube, when yield is identical, can improve the cycle of operation, can improve yield of ethene when identical in the cycle of operation and improve processing performance, prolong the boiler tube life-span; Improve mechanical property than existing 2-1 type boiler tube simultaneously, not flexible when boiler tube is heated, prolong the boiler tube life-span.And because the employing first Cheng Shangduan boiler tube central plane and the second journey boiler tube central plane are angled crossing, when burner hearth length was identical, the more pipe of arranging reduced the cumulative volume of radiation section burner hearth.Owing to is two inlet pipes at the first journey epimere, and the first journey boiler tube and the second journey boiler tube are staggered, so pyrolyzer one journey boiler tube quick heating, and whole boiler tube is heated comparatively even, can reduce the generation of coking effectively.Therefore, the invention enables the processing performance of boiler tube and mechanical property to be taken into account, improved the overall performance of pyrolyzer greatly, and save cost.
Description of drawings
Fig. 1 is the ethane cracking furnace synoptic diagram.
Fig. 2 is the synoptic diagram of the 2-1 type two journey boiler tubes of prior art.
Fig. 3 is that the master of 2/1-1 type boiler tube of the present invention looks synoptic diagram.
Fig. 4 is the schematic side view of 2/1-1 type boiler tube of the present invention.
Fig. 5 is the schematic perspective view of two journey boiler tube plane A, the two face B of journey boiler tube lateral projection and inlet pipe plane C.
Fig. 6 is the projection view of pipe connecting on the B of projection plane.
Fig. 7 is the projection view of pipe connecting on the A of plane.
Fig. 8 is the boiler tube of the radiant section furnace tube bank main synoptic diagram of looking of arranging.
Fig. 9 is the boiler tube of the radiant section furnace tube bank schematic top plan view of arranging.
Figure 10 is the boiler tube of the radiant section furnace tube bank schematic side view of arranging.
Figure 11 is to be the schematic top plan view of arranging of the nest of boiler tube of unit composition with a boiler tube.
Figure 12 is to be the schematic top plan view of arranging of the nest of boiler tube of unit composition with a boiler tube.
Embodiment
Further describe the present invention below in conjunction with embodiment.Scope of the present invention is not subjected to the restriction of these embodiment, and scope of the present invention proposes in claims.
A kind of ethane cracking furnace of 2/1-1 type two-range radiant section boiler tube, this ethane cracking furnace comprises: high pressure drum 1, convection zone 2, radiant coil 3, burner 4, radiation section 5, quenching boiler 6;
Described each radiant coil 3 is two journey vertical furnace tubes, and this two journeys vertical furnace tube comprises: the first journey boiler tube 10, pipe connecting 20, the second journey boiler tube 30;
The described first journey boiler tube 10 comprises: two inlet pipes 11, Y-tube 12, the first journey hypomere pipe 13.
The epimere of the described first journey boiler tube 10 is two inlet pipes 11, and the internal diameter of each inlet pipe 11 is identical; Fixedly connected with two inlets of Y-tube 12 upper ends respectively in the lower end of each inlet pipe 11; An outlet is converged in the lower end of Y-tube 12, and this outlet is fixedlyed connected with the upper end of the first journey hypomere pipe 13; The described first journey hypomere pipe 13 is isometrical pipes, and the internal diameter of the first journey hypomere pipe 13 is greater than the internal diameter of first any inlet pipe 11 of journey epimere; Fixedly connected with the inlet of pipe connecting 20 in the lower end of the first journey hypomere pipe 13; The outlet of pipe connecting 20 is fixedlyed connected with the lower end of the second journey boiler tube 30; The internal diameter of the second journey boiler tube 30 is not less than the internal diameter of the first journey hypomere pipe 13; Said fixing is connected to welding.
Material enters from the upper end of inlet pipe 11, through the first journey hypomere pipe 13, pipe connecting 20, flows out radiant coil from the upper end of the second journey boiler tube 30;
Two inlet pipes 11 and the first journey hypomere pipe, 13 all vertical layouts, the medullary ray of the first journey hypomere pipe 13 is first journey medullary rays, two inlet pipes 11 are arranged in the first journey medullary ray zygomorphy; The second journey boiler tube, 30 vertical layouts, the medullary ray of the second journey boiler tube 30 is second journey medullary rays; The plane that the first journey medullary ray and the second journey medullary ray constitute is two journey boiler tube plane A, and described two journey boiler tube plane A are vertical guides; Vertical guide perpendicular to two journey boiler tube plane A is the two face B of journey boiler tube lateral projection;
The medullary ray of described pipe connecting 20 is three-dimensional U spirrillums; The projection of described pipe connecting 20 medullary rays on the two face B of journey boiler tube lateral projection is symmetric closed curve, and this medullary ray drop shadow curve begins difference both sides downwards from upper extreme point and extends, and converges to lower extreme point through arc curve; The projection of described pipe connecting 20 medullary rays on two journey boiler tube plane A is symmetric;
Described pipe connecting 20 is made up of pipe connecting inlet section 21, pipe connecting stage casing 22, pipe connecting inlet section 23 3 parts; Described pipe connecting stage casing 22 is one section bend pipe, is in the plane, and this bend pipe is semicircle.
The upper end of pipe connecting inlet section 21 connects boiler tube, and is curved through an arc, becomes straight tube, curved through an arc again, is connected with pipe connecting stage casing 22; Pipe connecting inlet section 21 and pipe connecting outlet section 23 are symmetric; All junctions all are smooth tangent.
Two medullary rays of described two inlet pipes 11 constitute inlet pipe plane C, and described inlet pipe plane C is a vertical guide; Inlet pipe plane C and two journey boiler tube plane A intersect miter angle.
The internal diameter of inlet pipe 11 is 40mm～50mm.
The internal diameter of the first journey hypomere pipe 13 is 55mm～65mm.
The internal diameter of the second journey boiler tube 30 is 65mm～75mm.
Described each radiant coil 3 is arranged to radiant section furnace tube bank 40, and this radiant section furnace tube bank 40 is made up of 5 radiant coils 3; The first journey medullary ray and the second journey medullary ray of each radiant coil 3 all are arranged in the same vertical guide.
Alleged vertical, the vertical and vertical of the present invention is meant on the engineering significance, is not on the mathematical meaning, represents that just boiler tube is vertical layout.Allow deviation in actual engineering design, construction, because thermal distortion, produce distortion inevitably when particularly using, can not be in geometric vertical state all the time, this and technical scheme of the present invention are still and are equal to.
First journey medullary ray of first radiant coil 3 and the second journey medullary ray of second radiant coil 3 are arranged in the tube bank central plane D successively, and according to the first journey medullary ray and the second journey medullary ray all the other each radiant coils 3 that are intervally arranged, until the first journey medullary ray of the last radiant coil 3 of arranging; And then first radiant coil 3 second journey medullary rays of arranging, and according to the first journey medullary ray and the second journey medullary ray all the other each radiant coils 3 that are intervally arranged, until the second journey medullary ray of the last radiant coil 3 of arranging.
The radiation section of this ethane cracking furnace contains 8 radiant section furnace tube banks 40.
In the present embodiment, the inlet pipe 11 of each radiant coil is the identical isometrical pipe of caliber in the pyrolyzer, and each first journey hypomere pipe 13 also is the identical isometrical pipe of caliber, and each second journey boiler tube 30 also is the identical isometrical pipe of caliber.
Add enhanced heat transfer component in the boiler tube.Enhanced heat transfer component is the flight plug-in part.
Under identical cracking severity, ethene design yield is 28.0%, pyrolyzer throw oil mass be 20.0 tons/time condition under, the correlation data of the embodiment of the invention and prior art sees Table 1.
The correlation data of table 1 embodiment of the invention and prior art
| The boiler tube configuration | The embodiment of the invention | Prior art 2-1 type boiler tube | Prior art 1-1 type boiler tube | |||
| Hydrocarbon inlet amount ton/time | 20.00 | 20.00 | 20.00 | |||
| Dilution steam generation amount ton/time | 12.00 | 12.00 | 12.00 | |||
| Thinning ratio | 0.60 | 0.60 | 0.60 | |||
| Operation phase | SOR | EOR | SOR | EOR | SOR | EOR |
| Radiation section temperature in ℃ | 587 | 605 | 587 | 605 | 587 | 605 |
| Pressure MPa (G) | 0.1803 | 0.2295 | 0.1953 | 0.2338 | 0.1925 | 0.2291 |
| Radiation section temperature out ℃ | 855 | 860 | 859 | 861 | 862 | 866 |
| Pressure MPa (G) | 0.1293 | 0.1399 | 0.1317 | 0.1427 | 0.1313 | 0.1428 |
| Boiler tube pressure drop MPa | 0.0510 | 0.0896 | 0.0636 | 0.0911 | 0.0612 | 0.0863 |
| TLE temperature in ℃ | 839 | 844 | 845 | 847 | 844 | 849 |
| Pressure MPa (G) | 0.1220 | 0.1300 | 0.1220 | 0.1300 | 0.1220 | 0.1300 |
| Running period (calculated value) day | 61.5 | 45.8 | 38.6 | |||
Claims (19)
- The ethane cracking furnace of 1 two-range radiant section boiler tube, this ethane cracking furnace comprises: high pressure drum [1], convection zone [2], radiant coil [3], burner [4], radiation section [5], quenching boiler [6]; It is characterized in that:Described each radiant coil [3] is two journey vertical furnace tubes, and this two journeys vertical furnace tube comprises: the first journey boiler tube [10], pipe connecting [20], the second journey boiler tube [30];The described first journey boiler tube [10] comprising: two inlet pipes [11], Y-tube [12], the first journey hypomere pipe [13]; The epimere of the described first journey boiler tube [10] is two inlet pipes [11]; Fixedly connected with two inlets of Y-tube [12] upper end respectively in the lower end of each inlet pipe [11]; An outlet is converged in the lower end of Y-tube [12], and this outlet is fixedlyed connected with the upper end of the first journey hypomere pipe [13]; Fixedly connected with the inlet of pipe connecting [20] in the lower end of the first journey hypomere pipe [13]; The outlet of pipe connecting [20] is fixedlyed connected with the lower end of the second journey boiler tube [30]; Material enters from the upper end of inlet pipe [11], through the first journey hypomere pipe [13], pipe connecting [20], flows out radiant coil from the upper end of the second journey boiler tube [30];Two inlet pipes [11] and the first journey hypomere pipe [13] arrange vertically that all the medullary ray of the first journey hypomere pipe [13] is the first journey medullary ray, and two inlet pipes [11] are arranged in the first journey medullary ray zygomorphy; The second journey boiler tube [30] arranges that vertically the medullary ray of the second journey boiler tube [30] is the second journey medullary ray; The plane that the first journey medullary ray and the second journey medullary ray constitute is two journey boiler tube plane A, and described two journey boiler tube plane A are vertical planes; Vertical plane perpendicular to two journey boiler tube plane A is the two face B of journey boiler tube lateral projection;The medullary ray of described pipe connecting [20] is the three-dimensional U spirrillum; The projection of described pipe connecting [20] medullary ray on the two face B of journey boiler tube lateral projection is symmetric closed curve, and this medullary ray drop shadow curve begins difference both sides downwards from upper extreme point and extends, and converges to lower extreme point through arc curve; The projection of described pipe connecting [20] medullary ray on two journey boiler tube plane A is symmetric;Two medullary rays of described two inlet pipes [11] constitute inlet pipe plane C, and described inlet pipe plane C is a vertical plane; Inlet pipe plane C and two journey boiler tube plane A are the angle of 0 degree to 90 degree;Radiant section furnace tube bank [40] comprises odd number radiant coil [3]; In each radiant section furnace tube bank [40]: the first journey medullary ray and the second journey medullary ray of each radiant coil [3] all are arranged in the same vertical plane, and this vertical plane is tube bank central plane D;When comprising three or three above odd number radiant coils [3] in radiant section furnace tube bank [40], in this radiant section furnace tube bank [40]: the first journey medullary ray of a radiant coil [3] and the second journey medullary ray of another radiant coil [3] are arranged in successively restrains in the central plane D.When including only a radiant coil [3] in the radiant section furnace tube bank [40], in pyrolyzer: the first journey medullary ray of a radiant coil [3] is adjacent with the second journey medullary ray, and then the first journey medullary ray of another radiant coil [3] of arranging successively and the second journey medullary ray; The first journey medullary ray of each radiant coil [3] and the second journey medullary ray are all in tube bank central plane D.
- The ethane cracking furnace of 2 two-range radiant section boiler tubes according to claim 1 is characterized in that:In described each radiant coil [3], along material from the upstream downstream, the cross section total area is more than or equal to the cross section total area in the pipe of upstream in the pipe in radiant coil [3] downstream, and cross-sectional area is greater than cross-sectional area summation in the pipe of this boiler tube entrance end in the pipe of radiant coil exit end.
- The ethane cracking furnace of 3 two-range radiant section boiler tubes according to claim 1 and 2 is characterized in that:Described pipe connecting [20] comprises three parts: pipe connecting inlet section [21], pipe connecting stage casing [22], pipe connecting outlet section [23];Described pipe connecting stage casing [22] is one section bend pipe, is in the plane, and this bend pipe is semicircle, part circular, ellipse or parabola shaped.
- 4 ethane cracking furnaces according to claim 1,2 or 3 described two-range radiant section boiler tubes is characterized in that:Described inlet pipe [11], the first journey hypomere pipe [13] and the second journey boiler tube [30] all are respectively isometrical pipes.
- 5 ethane cracking furnaces according to claim 1,2 or 3 described two-range radiant section boiler tubes is characterized in that:Among described inlet pipe [11], the first journey hypomere pipe [13] and the second journey boiler tube [30], have at least one to be adapter bonnet.
- 6 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 5 is characterized in that:The length of the inlet pipe of the described first journey boiler tube [11] is 10%～80% of the first journey boiler tube total length.
- The ethane cracking furnace of 7 two-range radiant section boiler tubes according to claim 6 is characterized in that:The length of the inlet pipe of the described first journey boiler tube [11] is 20%～60% of the first journey boiler tube total length.
- 8 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 7 is characterized in that:The inside diameter ranges of described inlet pipe [11] is 30mm～60mm.
- The ethane cracking furnace of 9 two-range radiant section boiler tubes according to claim 8 is characterized in that:The inside diameter ranges of described inlet pipe [11] is 35mm～55mm.
- 10 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 9 is characterized in that:The inside diameter ranges of the described first journey hypomere pipe [13] is 40mm～80mm.
- The ethane cracking furnace of 11 two-range radiant section boiler tubes according to claim 10 is characterized in that:The inside diameter ranges of the described first journey hypomere pipe [13] is 50mm～70mm.
- 12 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 11 is characterized in that:The inside diameter ranges of the described second journey boiler tube [30] is 50mm～100mm.
- The ethane cracking furnace of 13 two-range radiant section boiler tubes according to claim 12 is characterized in that:The inside diameter ranges of the described second journey boiler tube [30] is 55mm～80mm.
- 14 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 13 is characterized in that:Described inlet pipe plane C and two journey boiler tube plane A are 30 degree to 60 degree angles.
- The ethane cracking furnace of 15 two-range radiant section boiler tubes according to claim 14 is characterized in that:Described inlet pipe plane C and two journey boiler tube plane A are 45 degree angles.
- 16 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 13 is characterized in that:Described inlet pipe plane C and two journey boiler tube plane A are 0 degree angle, and inlet pipe plane C overlaps with two journey boiler tube plane A.
- 17 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 16 is characterized in that:Described radiant section furnace tube bank [40] is made up of 1,3,5,7,9,11 or 13 radiant coils [3].
- 18 ethane cracking furnaces according to each described two-range radiant section boiler tube in the claim 1 to 17 is characterized in that:The radiation section burner hearth of this ethane cracking furnace contains a plurality of radiant section furnace tube banks [40].
- 19 ethane cracking furnaces according to the described two-range radiant section boiler tube of one of claim 1 to 19 is characterized in that:Add enhanced heat transfer component in the boiler tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710097705 CN101062882A (en) | 2006-04-29 | 2007-04-28 | Ethylene cracking furnace with two-stroke radiation furnace tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620113419 | 2006-04-29 | ||
| CN200620113419.9 | 2006-04-29 | ||
| CN 200710097705 CN101062882A (en) | 2006-04-29 | 2007-04-28 | Ethylene cracking furnace with two-stroke radiation furnace tube |
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| Publication Number | Publication Date |
|---|---|
| CN101062882A true CN101062882A (en) | 2007-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710097705 Pending CN101062882A (en) | 2006-04-29 | 2007-04-28 | Ethylene cracking furnace with two-stroke radiation furnace tube |
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| Country | Link |
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| CN (1) | CN101062882A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103773421A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Two-range radiant section furnace tube used for ethylene cracking furnace |
| CN104140841A (en) * | 2013-05-07 | 2014-11-12 | 中国石化工程建设有限公司 | An ethylene cracking furnace |
| CN111533636A (en) * | 2020-05-12 | 2020-08-14 | 华东理工大学 | Industrial cracking furnace with shielding-type distributed radiation section furnace tubes |
-
2007
- 2007-04-28 CN CN 200710097705 patent/CN101062882A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103773421A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Two-range radiant section furnace tube used for ethylene cracking furnace |
| CN103773421B (en) * | 2012-10-23 | 2015-10-07 | 中国石油化工股份有限公司 | A kind of two-range radiant section boiler tube for ethane cracking furnace |
| CN104140841A (en) * | 2013-05-07 | 2014-11-12 | 中国石化工程建设有限公司 | An ethylene cracking furnace |
| CN104140841B (en) * | 2013-05-07 | 2016-05-11 | 中国石化工程建设有限公司 | A kind of ethane cracking furnace |
| CN111533636A (en) * | 2020-05-12 | 2020-08-14 | 华东理工大学 | Industrial cracking furnace with shielding-type distributed radiation section furnace tubes |
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Open date: 20071031 |