CN2876613Y - Intermediate furnace tubeseat hanging combination structure for cylinder pipe type heating furnace - Google Patents
Intermediate furnace tubeseat hanging combination structure for cylinder pipe type heating furnace Download PDFInfo
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- CN2876613Y CN2876613Y CN 200520084780 CN200520084780U CN2876613Y CN 2876613 Y CN2876613 Y CN 2876613Y CN 200520084780 CN200520084780 CN 200520084780 CN 200520084780 U CN200520084780 U CN 200520084780U CN 2876613 Y CN2876613 Y CN 2876613Y
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Abstract
An intermediate furnace tube seat hanging combination structure for cylinder pipe type heating furnace is a seat hanging combination structure which make the seat to be the main, the combination structure is composed by a medium furnace tube of radiant chamber, a medium furnace tube base structure of radiant chamber, a medium furnace tube linked-row structure of radiant chamber, and a medium furnace tube hanger structure of radiant chamber. The combination structure solves the technical defects that the existing cylinder pipe type heating furnace is difficult to add radiant chamber medium furnace tube, also on the premise of keeping the usual diameter and height, the combination structure improves the heat load from 22MW of original furnace heat load to 38MW, which adds investment only 39 percent (the high-strength burner occupies more than 25 percent of the adding investment). 38MW adopts the new cylinder furnace with the technique saves investment 23 percent which is compared with the vertical furnace of the same heat load (because no similar 38MW cylinder furnace can be compared in china), and saves 20 to 31 percent investment which is compared with the furnace with the heat load 30 to 48MW.
Description
Technical field
Present technique is used for petrochemical industry cylindrical shape tubular type heating furnace, belongs to the petrochemical equipment technical field.
Background technology
Cylindrical shape tubular type heating furnace is a widely used technology heating furnace in oil refining, petrochemical industry and the chemical industry, mode of heating is for directly being subjected to fiery formula, as thermal source, heat the process fluids such as crude oil, distillate, residual oil or gas hydro carbons that in boiler tube, flow with thermal-flame that fuel combustion was produced and flue gas by the boiler tube tube wall.Cylindrical shape tubular type heating furnace is the type of furnace the most frequently used in the tube furnace, and its structure generally is made up of radiation chamber, the convection cell that is located at radiation chamber top and residual neat recovering system.
Thermic load is greater than the cylindrical shape tubular type heating furnace of 20MW, radiation chamber boiler tube majority is the swing pipe structure, arrange along cylinder side wall lining attached wall, burner arrangement is in the central area of radiation chamber bottom, flame and flue gas form cylindric high-temperature region, main with the radiation chamber furnace tube heat transfer of radiation mode to attached wall, for the single row of tubes single side radiation conducts heat.In order to reach high thermal efficiency (＞90%), generally bigger in the convection cell design size on radiation chamber top.Along with the increase of thermic load, when thermic load surpassed 30MW, cylindrical shape tubular type heating furnace diameter and highly obviously increase made the high-alloy steel structure significant change of radiation chamber top especially, and equipment volume and equipment manufacturing cost significantly improve.Boiler tube is the preferred embodiments that improves thermic load in the middle of setting up, for the harmonious swing pipe structure that also adopts of attached wall boiler tube because middle boiler tube is in the projection of convection cell, its boiler tube high-alloy steel hanger structure bulky complex causes equipment cost significantly to increase.
Summary of the invention
For solving the technological deficiency of existing cylindrical shape tubular type heating furnace, under the prerequisite that does not change common diameter of cylindrical furnace and height, thermic load is significantly improved, promptly obtain bigger thermic load and improve with less investment cost.The middle boiler tube that the utility model increases in the middle of cylindrical shape tubular type heating furnace radiation chamber adopts seat Guan Weizhu, swing pipe is that the seat of assisting hangs the combination new technology, middle boiler tube is arranged in the projection of convection cell box-shaped, has solved middle boiler tube high-alloy steel hanger structure complexity and the huge problem of radiation top steel construction.Boiler tube is two-sided radiation in the middle of making, thereby significantly improves heat output.Make thermic load bring up to 33-48MW by 22-30MW.And the restriction of breakthrough comb ratio of height to diameter 2.75, be up to 4.0.
When generally cylindrical shape tubular type stove thermic load is greater than 20MW, in order to improve the thermal efficiency (＞90%), the Load Distribution ratio of radiation chamber and convection cell is below 66: 33, the convection cell size that is located in the radiation chamber top like this is bigger, boiler tube will be within the square frame projection of convection cell boiler tube in the middle of the radiation chamber, and (thermic load is pressed diameter and length greater than 20MW cylindrical furnace radiation chamber boiler tube, requiring the overwhelming majority according to design specification all is swing pipe), this brings difficulty for swing pipe.If adopt full swing pipe structure, the weight of process-stream is all born by radiation top steel construction in boiler tube and the pipe, and the high-alloy steel hanger structure at furnace roof steel construction and middle boiler tube top will be very huge, and investment is significantly increased.The utility model adopts seat to hang the combined type technology, and is opposite with conventional method with seat Guan Weizhu, and 3/4 to 4/5 of boiler tube weight is born by the furnace bottom steel construction in the middle of making, and breaks through all-radiant furnace base pipe range carefully than 225 restriction, and maximum can reach 320.
The technical scheme that its technical problem that solves the utility model adopts is: cylindrical shape tubular type heating furnace intermediate furnace base hangs combining structure by boiler tube in the middle of the radiation chamber, radiation chamber intermediate furnace pipe support structure, boiler tube townhouse structure in the middle of the radiation chamber, radiation chamber intermediate furnace tube hanger structure constitutes, it is characterized in that: middle boiler tube is to be fixed on the radiation chamber intermediate furnace pipe support structure, radiation chamber intermediate furnace pipe support structure supports radiation chamber intermediate furnace tube hanger structure as the main of middle boiler tube, boiler tube townhouse structure is that the seat of honour hangs combining structure with the seat as middle boiler tube supplemental support in the middle of the radiation chamber.
The utility model possesses following beneficial effect: transform example as with a cylindrical furnace: before the transformation, former stove thermic load is 22MW, through adopting the intermediate furnace base to hang combination technique and cooperating with using high-strength burner, make thermic load reach 38MW, improve 72% (wherein high-strength burner improves contribution ≯ 20% of part to thermic load), investment only increases by 39%; Adopt the new cylindrical furnace of this technology for a 38MW, with the vertical heater of same thermic load (because of the cylindrical furnace that does not have similar 38MW at home comparable) relatively reduce investment outlay 23%, for the stove of the thermic load 30-48MW 20-31% that can reduce investment outlay.
Present technique can solve in the capacity expansion revamping and be pressed for time, significantly improve the problem that the thermic load difficulty is big, cost is high.As the cylindrical furnace of 3,000,000 tons of/year treating capacities, adopt present technique can be transformed into 5,000,000 tons of/year treating capacities, and in turn(a)round 35-45 days, finish the transformation of stove, significantly increase the benefit.
Description of drawings
Accompanying drawing 1 hangs the structural map of combining structure for cylindrical shape tubular type heating furnace intermediate furnace base, among the figure: boiler tube townhouse structure, 7-radiation chamber attached wall boiler tube, 8-radiation chamber intermediate furnace tube hanger structure, 9-radiation chamber top steel construction, 10-convection cell in the middle of boiler tube, the 6-radiation chamber in the middle of 1-central burner, 2-annular burner, 3-furnace bottom steel construction, 4-radiation chamber intermediate furnace pipe support structure, the 5-radiation chamber.
Accompanying drawing 2-7 is that cylindrical shape tubular type heating furnace intermediate furnace base hangs the middle boiler tube comb of combining structure radiation chamber cross sectional shape figure.Wherein Fig. 2 is that the little triangle pitch circle of biexhaust pipe line, Fig. 4 are that the big triangle pitch circle of three combs line, Fig. 5 are that single row of tubes polygon pitch circle line, Fig. 6 are that the little zigzag pitch circle of biexhaust pipe line, Fig. 7 are the big zigzag pitch circle of three combs line for the circular pitch circle line of single row of tubes, Fig. 3.
Accompanying drawing 8-13 is that cylindrical shape tubular type heating furnace intermediate furnace base hangs combining structure radiation chamber intermediate furnace tube hanger planform figure.Wherein Fig. 8 is that the circular suspension bracket of monoblock type, Fig. 9 are that monoblock type polygon suspension bracket, Figure 10 are that split type polygon suspension bracket, Figure 11 are that I shape suspension bracket cross section, Figure 12 are that T type suspension bracket cross section, Figure 13 are inverted T shape suspension bracket cross section.
Specific embodiments
Add the intermediate arrangement one circle standpipe of stove radiation chamber as boiler tube (5) in the middle of the radiation chamber in the cylindrical shape tubular type, fixed by boiler tube townhouse structure (6), radiation chamber intermediate furnace tube hanger structure (8) in the middle of radiation chamber intermediate furnace pipe support structure (4), the radiation chamber, attached wall arranges that a circle standpipe is as radiation chamber attached wall boiler tube (7).The attached wall standpipe is a swing pipe, and is identical with existing cylindrical furnace.Boiler tube is following the combining structure of hanging oneself in the middle of the radiation chamber, and the boiler tube top is the swing pipe structure, and the middle part is the townhouse structure, and the boiler tube bottom is a seat structure.
Multiple shape shown in accompanying drawing 2-7 can be adopted in boiler tube comb cross section in the middle of the cylindrical shape tubular type heating furnace radiation chamber.Such as the circular pitch circle line (Fig. 2) of single row of tubes, the little triangle pitch circle of biexhaust pipe line (Fig. 3), the big triangle pitch circle of three combs line (Fig. 4), single row of tubes polygon pitch circle line (Fig. 5), the little zigzag pitch circle of biexhaust pipe line (Fig. 6), the big zigzag pitch circle of three combs line (Fig. 7).
Radiation chamber intermediate furnace tube hanger structure (8) should guarantee make progress expanded by heating and be radially expanded the small part weight that after gallows still bears boiler tube of boiler tube.Boiler tube townhouse structure (6) can increase boiler tube stability in the middle of the radiation chamber, and adapts to the expanded by heating needs between each tube side.The boiler tube comb was not only played a supporting role but also comb is not broken away from running in the middle of radiation chamber intermediate furnace pipe support structure (4) guaranteed, can make simultaneously the free radial displacement of comb and suitably spacing, and should rationally be connected with the furnace bottom steel construction, both considered to give furnace bottom the comb weight transfer, considered the expanded by heating of comb self again.
Radiation chamber intermediate furnace tube hanger structure (8) can adopt the circular suspension bracket (Fig. 8) of the monoblock type shown in the accompanying drawing 8-13, monoblock type polygon suspension bracket (Fig. 9), split type polygon suspension bracket (Figure 10) according to the number of tube passes of middle boiler tube.The suspension bracket cross sectional shape can adopt I shape suspension bracket cross section (Figure 11), T type suspension bracket cross section (Figure 12), inverted T shape suspension bracket cross section (Figure 13).The hanger structure horizontal cross sectional geometry should be a symmetry axis with the radiation chamber vertical axis.Should bear 1/5～2/5 gravity of boiler tube weight, and give top construction weight transfer, also will consider the dilatancy of self.Under maximum temperature and the harshest stress condition, satisfy requirement of strength.
Radiation chamber top steel construction (9) should consider to bear the weight of intermediate furnace tube hanger and partial radiation chamber boiler tube, and logistics weight is born by the furnace bottom steel construction in most of weight of the middle boiler tube of radiation chamber and the pipe, thereby total steel construction weight increase seldom.
Arrange a circle annular burner (2) in the bottom of the annular space between the boiler tube (5) in the middle of radiation chamber attached wall boiler tube (7) and the radiation chamber, the distance between burner that this is circular layout and attached wall boiler tube and the middle boiler tube, the quantity of burner and energy should be complementary with the number of tube passes of attached wall boiler tube and middle boiler tube.
The center bottom of boiler tube (5) is arranged a macro-energy burner or several the central burner (1) that little energy burner is formed in the middle of radiation chamber, boiler tube is two-sided radiation and the attached wall boiler tube is a single side radiation in the middle of the radiation chamber like this, the energy of central burner should be complementary with annular burner, makes attached wall boiler tube and middle boiler tube reach needed calorific intensity and thermic load.In order to obtain desirable Temperature Distribution and uniform calorific intensity, the Energy distribution of burner should be balanced, and principle is to control the ratio of middle boiler tube (during single row of tubes) and attached wall boiler tube average surface calorific intensity between 1.3-1.5.
Convection cell boiler tube area should be complementary with the radiation chamber boiler tube, to obtain rational high thermal efficiency.
Claims (3)
1, a kind of cylindrical shape tubular type heating furnace intermediate furnace base hangs combining structure, constitute by boiler tube townhouse structure, radiation chamber intermediate furnace tube hanger structure in the middle of boiler tube, radiation chamber intermediate furnace pipe support structure, the radiation chamber in the middle of the radiation chamber, it is characterized in that: middle boiler tube is to be fixed on the radiation chamber intermediate furnace pipe support structure, radiation chamber intermediate furnace pipe support structure supports as the main of middle boiler tube, and boiler tube townhouse structure is that the seat of honour hangs combining structure with the seat as the supplemental support of middle boiler tube in the middle of radiation chamber intermediate furnace tube hanger structure, the radiation chamber.
2, cylindrical shape tubular type heating furnace intermediate furnace base according to claim 1 hangs combining structure and it is characterized in that: boiler tube comb cross sectional shape can be the circular pitch circle line of single row of tubes, the little triangle pitch circle of biexhaust pipe line, the big triangle pitch circle of three combs line, single row of tubes polygon pitch circle line, the little zigzag pitch circle of biexhaust pipe line, the big zigzag pitch circle of three combs line in the middle of the radiation chamber.
3, cylindrical shape tubular type heating furnace intermediate furnace base according to claim 1 hangs combining structure and it is characterized in that: radiation chamber intermediate furnace tube hanger structure can adopt the circular suspension bracket of monoblock type, monoblock type polygon suspension bracket, split type polygon suspension bracket according to the number of tube passes of middle boiler tube, the suspension bracket cross sectional shape can adopt I shape suspension bracket cross section, T type suspension bracket cross section, inverted T shape suspension bracket cross section, and the hanger structure horizontal cross sectional geometry should be a symmetry axis with the radiation chamber vertical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520084780 CN2876613Y (en) | 2005-06-29 | 2005-06-29 | Intermediate furnace tubeseat hanging combination structure for cylinder pipe type heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520084780 CN2876613Y (en) | 2005-06-29 | 2005-06-29 | Intermediate furnace tubeseat hanging combination structure for cylinder pipe type heating furnace |
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| CN2876613Y true CN2876613Y (en) | 2007-03-07 |
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| CN 200520084780 Expired - Lifetime CN2876613Y (en) | 2005-06-29 | 2005-06-29 | Intermediate furnace tubeseat hanging combination structure for cylinder pipe type heating furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940088A (en) * | 2017-03-28 | 2017-07-11 | 天津辰创环境工程科技有限责任公司 | A kind of squirrel-cage heating furnace |
| CN107974269A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of pyrolysis furnace |
| CN107974270A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of pyrolysis furnace |
| CN107974268A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of pyrolysis furnace |
| CN114459242A (en) * | 2021-12-29 | 2022-05-10 | 江苏新海石化有限公司 | High-efficiency heating furnace |
-
2005
- 2005-06-29 CN CN 200520084780 patent/CN2876613Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974269A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of pyrolysis furnace |
| CN107974270A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of pyrolysis furnace |
| CN107974268A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of pyrolysis furnace |
| CN107974270B (en) * | 2016-10-25 | 2020-02-18 | 中国石油化工股份有限公司 | Cracking furnace |
| CN107974269B (en) * | 2016-10-25 | 2020-07-21 | 中国石油化工股份有限公司 | Cracking furnace |
| CN107974268B (en) * | 2016-10-25 | 2020-07-24 | 中国石油化工股份有限公司 | Cracking furnace |
| CN106940088A (en) * | 2017-03-28 | 2017-07-11 | 天津辰创环境工程科技有限责任公司 | A kind of squirrel-cage heating furnace |
| CN114459242A (en) * | 2021-12-29 | 2022-05-10 | 江苏新海石化有限公司 | High-efficiency heating furnace |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150629 Granted publication date: 20070307 |
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| EXPY | Termination of patent right or utility model |