CN2814300Y - Fast cooling boiler with new structure - Google Patents
Fast cooling boiler with new structure Download PDFInfo
- Publication number
- CN2814300Y CN2814300Y CN 200520079222 CN200520079222U CN2814300Y CN 2814300 Y CN2814300 Y CN 2814300Y CN 200520079222 CN200520079222 CN 200520079222 CN 200520079222 U CN200520079222 U CN 200520079222U CN 2814300 Y CN2814300 Y CN 2814300Y
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- perforated plate
- distributor
- cracking gas
- heat exchange
- quenching
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Abstract
The utility model relates to a quenching boiler characterized in that the utility model successively comprises a distributor (3), a lower tube plate (6), a barrel body (5), an upper tube plate (9) and a connection tube (17) of a pyrolysis gas outlet from bottom to top, wherein the distributor (3) is a cylinder body with an inverted-cone transition section; the inlet (11) of the distributor is connected with the outlet (2) of a cracking boiler, and the outlet (13) is connected with the lower tube plate (6); simultaneously, a transfer passage (14) of pyrolysis gas with a plurality of branches uniformly distributed is formed in the distributor (3); the upper and the lower tube plates are two bowl-shaped bodies of which the sections are oval, and the two bowl-shaped bodies corresponds in a vertical direction; a plurality of dummy club passages (7) which are concentric with heat exchange tubes are uniformly distributed at the bottom of the lower tube plate (6); the transfer passages (14) of pyrolysis gas from the distributor are extended into the dummy club passages (7); a plurality of through holes which are concentric with the heat exchange tubes are uniformly distributed at the top of the upper tube plate (9); a plurality of parallel heat exchange tubes (4) are uniformly distributed in the barrel body; the lower end of each heat exchange tube is respectively communicated with the dummy club passages (7) of the lower tube plate, and the upper end corresponds to the through holes of the upper tube plate (9). The quenching boiler with the structure has the characteristics of short residence time of the pyrolysis gas, quick cooling, no vortex, strong processing capacity, big heat exchange, small pressure drop of the pyrolysis gas, low material consumption, simple structure, space saving and low cost of a whole, and effectively restrains the secondary reaction of the pyrolysis gas. The utility model has another characteristic that a plurality of quenching boilers of the.
Description
Technical field
The utility model relates to the equipment that is used for the cracking of ethylene technology, is specifically related to have the quenching boiler of new structure.
Background technology
Pyrolysis furnace is the essential elements of ethylene unit.Cracking stock through behind the Pintsch process, enters quenching boiler and cools off fast in cracking furnace tube, prevents the generation of secondary response, reduces the alkene loss, simultaneously energy recovery is produced steam.Traditional quenching boiler adopts double-sleeve quenching boiler or single sleeve pipe quenching boiler mostly.
As everyone knows, adopt a cracking gas access road and many heat exchange elements to be complementary, can significantly reduce the length of heat exchange element and reduce manufacturing cost.Based on this, the version of double-sleeve quenching boiler is as follows: it is made up of many casing type heat exchanging elements, and pipe is walked cracking gas in it, and the annular space between outer tube and the interior pipe is walked cooling medium---gas-vapor mix.The shared big inlet end socket of all heat exchanger tubes.In pipe and the two ends of outer tube be that the oblate pipe of elliptical shape is connected with the cross section respectively.The shortcoming of this form quenching boiler is the shared access road of cracking gas, and the time of staying is long, easily produces secondary response, and the alkene loss is many, is unfavorable for cracking.The part that enters heat exchange element at cracking gas can produce eddy current or dead band, forms coking.Owing to adopt many heat exchange elements, the distribution uneven phenomenon of cracking gas is serious simultaneously, and the coking of middle part heat exchange element is few, and the coking of peripheral position heat exchange element is many.After operation a period of time, must carry out hydraulic decoking.In recent years, double-sleeve quenching boiler is also updated, ZL00251218 adopts a kind of bull feed type double-sleeve quenching boiler, its heat exchange element is the same with original version, improve in the cracking gas porch, it has a plurality of cracking gas inlets, and each cracking gas inlet is branched off into a plurality of cracking gas passages again and then enters heat exchange element.The shortcoming of this form quenching boiler is that the length of quenching boiler is longer, and pipe all will be furnished with the passage that a heat exchange outer tube forms cooling medium in the every heat exchange.Complex structure of its inlet end socket of while, the expense costliness.
The heat exchange element of single sleeve pipe quenching boiler is made up of pipe in one and an outer tube.Interior pipe is walked cracking gas, and the annular space between outer tube and the interior pipe is walked cooling medium---gas-vapor mix.Every of the quenching boiler of this form has only a heat exchange element, and pyrolysis furnace outlet boiler tube is connected with the quenching boiler inlet.Though there is not the cracking gas assignment problem in this quenching boiler, not have eddy current yet and produce, its disposal ability is little, and heat exchange area is few, and cracking gas pressure falls bigger.The caliber of its heat exchanger tube is bigger simultaneously, and wall thickness is thicker, and manufacturing cost is also corresponding higher.
The utility model content
It is more simple that the purpose of this utility model provides a kind of structure, and the quenching boiler that the cracking gas time of staying is short, rapid, the no eddy current of cooling produces.
Concrete structure of the present utility model is: a kind of quenching boiler, comprise distributor, lower perforated plate, cylindrical shell, upper perforated plate, cracking gas discharge connection from the bottom to top successively, be evenly distributed with many parallel heat exchanger tubes in the cylindrical shell, walk cracking gas in the heat exchange tube, cooling medium is walked in the gap between heat exchanger tube and the cylindrical shell.
Wherein, distributor is one to have the cylinder of back taper changeover portion, and the distributor inlet links to each other with the pyrolysis furnace outlet, exports to link to each other with lower perforated plate, the equally distributed cracking gas transfer passage of a multiple-limb of while portion's formation within it, the cracking gas of autothermic cracking stove is divided into a plurality of a fluid streams in the future; Upper and lower tube sheet is that two corresponding up and down cross sections are oval-shaped bowl bodies, the lower perforated plate bottom is uniform-distribution with a plurality of boss passages concentric with heat exchanger tube, cracking gas transfer passage from distributor extend in the boss passage, and the upper perforated plate top is evenly distributed with a plurality of through holes concentric with heat exchanger tube equally; Average mark is furnished with many parallel heat exchanger tubes in the cylindrical shell, and the lower end of every heat exchanger tube is connected with the boss passage of lower perforated plate pipe, and the upper end is corresponding with the through hole of upper perforated plate.Cracking gas flows into heat exchanger tube in the cylindrical shell through the boss passage of the cracking gas transfer passage of distributor and lower perforated plate, through after the heat exchange, is collected to the cracking gas discharge connection by the through hole of upper perforated plate and flows out.
The utility model further proposes, and the cracking gas transfer passage port of export that extend in the lower perforated plate boss passage is a free end, and Qi Bishang has the uniform dilatation joint of annular; Between cracking gas transfer passage and distribution wall, form an annular space, wherein be filled with heat-barrier material; One side of lower perforated plate is connected with a boiler feedwater and takes over, and also is provided with the blowdown inspection opening at lowest part; One side of upper perforated plate is connected with a steam (vapor) outlet and takes over.
The quenching boiler structure that adopts the utility model to provide, the cracking gas time of staying is short, and cooling is rapid, and no eddy current produces, and has effectively suppressed the secondary response of cracking gas; Its disposal ability is big, and heat exchange area is big, and cracking gas pressure falls less; Consumption of materials is few, simple in structure simultaneously, saves the space, and overall cost is low.Another characteristics are to export arranging of boiler tube according to pyrolysis furnace, and the quenching boiler of many playscripts with stage directions utility model is connected in parallel forms a large-scale linear quenching boiler, and disposal ability is bigger.Both can be used for newly-built ethylene cracker, also be applicable to the transformation of old cracker.
Description of drawings
Fig. 1 is the structural representation of quenching boiler of the present utility model.
Fig. 2 is the A-A section plan view of Fig. 1.
The structural representation of Fig. 3 distributor.
The location diagram of Fig. 4 cracking gas transfer passage port of export and boss passage.
The structural representation of Fig. 5 lower perforated plate.
The structural representation of Fig. 6 upper perforated plate.
Fig. 7 is the quenching boiler of the many playscripts with stage directions utility model large-scale linear quenching boiler floor map that forms in parallel.
The specific embodiment
Consult Fig. 1, Fig. 2, quenching boiler 1 with new structure comprises parts such as distributor 3, lower perforated plate 6, cylindrical shell 5, upper perforated plate 9, cracking gas outlet 17 from the bottom to top successively, be evenly distributed with 4 parallel heat exchanger tubes 4 in the cylindrical shell, the cylindrical shell two ends have a changeover portion 8 and changeover portion 10 respectively, be connected in order to the transition with upper perforated plate 9, lower perforated plate 6, the butt joint welding is all adopted in the connection of above-mentioned parts.
Consult Fig. 3, distributor 3 wherein is by inlet 11, back taper changeover portion 12, outlet 13, cracking gas transfer passage 14.One end of inlet 11 and 2 welding of cracking gas outlet boiler tube, its internal diameter is identical with the internal diameter of cracking gas outlet boiler tube 2; The end face of outlet 13 and lower perforated plate 6 welding; Inlet 11, tapering transition section 12 are structure as a whole with outlet 13; Distributor inside, by 4 cracking gas transfer passages 14 of inlet 11 punishment expenditures, passage is evenly distributed on the cross circular section of distributor outlet 13.
Consult Fig. 4, Fig. 5, Fig. 6, upper and lower tube sheet of the present utility model is that two corresponding up and down cross sections are oval-shaped bowl bodies, and this shape can rely on the flexible of himself to absorb because the thermal expansion difference that the temperature difference is produced between the heat exchange element.The lower perforated plate bottom is uniform-distribution with 4 boss passages 7 concentric with heat exchanger tube, and each cracking gas transfer passage 14 stretches in the boss passage 7 of the lower perforated plate concentric with it 6, and the port of export 21 is a free end; Have four dilatation joints 24 that annular is uniform on the conduit wall of the port of export 21, cracking gas transfer passage 14 can free wxpansion in the boss passage 7 of lower perforated plate 6; Be filled with heat-barrier material 18, heat-resisting alloy ring flat-plate 19 and ceramic fibre 20 in the annular space 22 between cracking gas transfer passage 14 and distributor 3 outer walls.One end of heat exchanger tube 4 docks welding with the boss passage 7 of lower perforated plate 6, and internal diameter is identical with the internal diameter of the boss passage 7 of lower perforated plate 6; The through hole of the other end of heat exchanger tube 4 and upper perforated plate 9 adopts the deep hole weldering.
One side of lower perforated plate is connected with a boiler feedwater and takes over 15, from a side of lower perforated plate 6 cooling water is introduced, between lower perforated plate 6, changeover portion 8, cylindrical shell 5, changeover portion 10, upper perforated plate 9 and heat exchanger tube 4, form cooling space, cooling water and cracking gas are by after the heat exchanger tube 4 partition heat exchange, form gas-vapor mix, gas-vapor mix upwards flows through the steam (vapor) outlet adapter 16 of upper perforated plate 9 one sides and draws.Cracking gas then enters in the heat exchanger tube 4 by 4 the cracking gas transfer passages 14 and the boss passage 7 of distributor 3 inside, at last by delivering to the downstream with the cracking gas discharge connection 17 of upper perforated plate 9 welding.The opposite side lowest part of lower perforated plate also is provided with blowdown inspection opening 23, can play the blowdown effect that is interrupted on the one hand, on the other hand when the quenching boiler parking maintenance, available corresponding tool carries out mechanical removal by the impurity that the blowdown inspection opening will be deposited on lower perforated plate bottom, and the cooling space of quenching boiler is in clean conditions when putting into operation once more with the quenching boiler that guarantees to have new structure.
Claims (6)
1. the quenching boiler that has new structure, it is characterized in that comprising successively from the bottom to top distributor (3), lower perforated plate (6), cylindrical shell (5), upper perforated plate (9), cracking gas discharge connection (17), distributor wherein (3) is one to have the cylinder of back taper changeover portion, distributor inlet (11) links to each other with pyrolysis furnace outlet (2), and outlet (13) links to each other with lower perforated plate (6); The equally distributed cracking gas transfer passage (14) of a multiple-limb of while portion's formation within it; Upper and lower tube sheet is that two corresponding up and down cross sections are oval-shaped bowl bodies, lower perforated plate (6) bottom is uniform-distribution with a plurality of boss passages (7) concentric with heat exchanger tube, cracking gas transfer passage (14) from distributor extend in the boss passage (7), and upper perforated plate (9) top is uniform-distribution with a plurality of through holes concentric with heat exchanger tube; Average mark is furnished with many parallel heat exchanger tubes (4) in the cylindrical shell, and the lower end of every heat exchanger tube is connected with the boss passage (7) of lower perforated plate pipe, and the upper end is corresponding with upper perforated plate (9) through hole.
2. quenching boiler according to claim 1 is characterized in that the cracking gas transfer passage port of export (21) that extend in the lower perforated plate boss passage (7) is a free end, has annular equally distributed dilatation joint (24) on the wall.
3. quenching boiler according to claim 2 is characterized in that forming an annular space (22) between cracking gas transfer passage (14) and distributor (3) wall, wherein is filled with heat-barrier material (18), heat-resisting alloy ring flat-plate (19) and ceramic fibre (20).
4. quenching boiler according to claim 3 is characterized in that a side of lower perforated plate (6) is connected with boiler feedwater adapter (15), and a side of upper perforated plate (9) is connected with a steam (vapor) outlet and takes over (16).
5. quenching boiler according to claim 4 is characterized in that the lowest part of lower perforated plate (6) also is provided with blowdown inspection opening (23).
6. quenching boiler according to claim 1 is characterized in that exporting arranging of boiler tube according to pyrolysis furnace, many described quenching boilers can be connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079222 CN2814300Y (en) | 2005-08-02 | 2005-08-02 | Fast cooling boiler with new structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079222 CN2814300Y (en) | 2005-08-02 | 2005-08-02 | Fast cooling boiler with new structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2814300Y true CN2814300Y (en) | 2006-09-06 |
Family
ID=36949387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520079222 Expired - Lifetime CN2814300Y (en) | 2005-08-02 | 2005-08-02 | Fast cooling boiler with new structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2814300Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162129B (en) * | 2007-11-28 | 2011-10-05 | 上海吴泾化工有限公司 | Method for utilizing cracking gas waste heat and gas-gas exchanger used therefor |
-
2005
- 2005-08-02 CN CN 200520079222 patent/CN2814300Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162129B (en) * | 2007-11-28 | 2011-10-05 | 上海吴泾化工有限公司 | Method for utilizing cracking gas waste heat and gas-gas exchanger used therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee after: Sinopec Corp. Patentee after: Tianhua Institute of Chemical Machinery & Automation Co., Ltd. Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee before: Sinopec Corp. Patentee before: Tianhua Chemical Machinery & Automation Research Inst. |
|
| CX01 | Expiry of patent term |
Expiration termination date: 20150802 Granted publication date: 20060906 |
|
| EXPY | Termination of patent right or utility model |