CN206531413U - A kind of multi-functional cracking rapid-cooling heat exchanger - Google Patents
A kind of multi-functional cracking rapid-cooling heat exchanger Download PDFInfo
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- CN206531413U CN206531413U CN201720064904.XU CN201720064904U CN206531413U CN 206531413 U CN206531413 U CN 206531413U CN 201720064904 U CN201720064904 U CN 201720064904U CN 206531413 U CN206531413 U CN 206531413U
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Abstract
A kind of multi-functional cracking rapid-cooling heat exchanger of the present utility model, its structure includes housing, housing is communicated with downcomer header and upcast header, one end of housing is provided with boiler feedwater inlet, its other end is exported provided with boiler feedwater, when cracking liquid phase feed, close boiler feedwater inlet and boiler feedwater outlet, open the outlet of the entrance and upcast header of downcomer header, cooling medium enters housing through downcomer header and carries out heat exchange with heat exchanger tube, then excluded through upcast header, you can realize the chilling of liquid phase feed；In cracked gas raw material, close the outlet of the entrance and upcast header of downcomer header, either on or off boiler feedwater inlet and boiler feedwater outlet, cooling medium enters housing through boiler feedwater inlet and carries out heat exchange with heat exchanger tube, then export and exclude through boiler feedwater, the chilling of gas raw material can be achieved, this enables the utility model to take into account the chilling for realizing liquid phase and gas raw material, and then significantly improves utilization rate of equipment and installations.
Description
Technical field
The utility model is related to the technical field of rapid-cooling heat exchanger, more particularly to a kind of multi-functional cracking rapid-cooling heat exchanger.
Background technology
Pyrolysis furnace is the essential elements of ethylene unit, cracking stock in the boiler tube of pyrolysis furnace after Pintsch process, meeting
Ethene is produced, while the significant by-products such as propylene, butadiene, benzene,toluene,xylene can also be obtained.Crack the high temperature of outlet of still
Cracking gas（Generally 750~900 DEG C）It will proceed cracking reaction under outlet hot conditions（Secondary response）If stopped
Overlong time, secondary response can increase, and its result will decline olefin recovery in pyrolysis product, methane, hydrogen, heavy tar
Increase, coking trend is increased；To make olefin recovery keep stable, it must just make the Pintsch process gas of cracking outlet of still as early as possible
Ground cools down（Typically below 600 DEG C）, now under temperature of the cracking gas in stable state, can so terminate substantially
Secondary response, in addition, in cracking gas chilling temperature-fall period, a large amount of heat energy that can be released, these heat energy be value very
High thermal source, is used for producing 12.0MPa or so high steam, therefore have to Pintsch process gas progress quenching after recovery
Important economic value.
At present, wall-type heat exchange, chilling heat exchange are carried out using rapid-cooling heat exchanger mostly to the cooling mode of Pintsch process gas
The more general heat exchanger of device is with higher calorific intensity is high, operating condition is strict, while bearing high temperature and high pressure etc., such as chilling
In the heat exchanger tube of heat exchanger（Pipe side）Walk outside the Pintsch process gas of 800 DEG C or so of high-temperature medium, heat exchanger tube（Shell-side）Walk -350 DEG C
The gas-vapor mix of left and right is used as cooling medium, so that rapid-cooling heat exchanger from technique can be divided into one-level chilling technique and
Two grades of chilling techniques, such as patent CN102492456A disclose a kind of quenching heat exchanger for ethylene cracking furnace, and which employs two
Plant cooling medium and two grades of chillings are realized to cracking gas, one of which cooling medium is the stove water of HP steam drum, another middle cooling is situated between
Matter is the lower boiler feedwater of temperature.When being gas raw material for cracking stock, rapid-cooling heat exchanger even can also be anxious using three-level
Refrigeration technique carries out chilling to it.
Due to the difference of component in cracking stock, cracking liquid phase feed is more easy to coking than cracked gas raw material, to reduce
The coking of rapid-cooling heat exchanger is inclined to, it is necessary to control the outlet temperature of cracking gas so that outlet temperature should be higher than that the dew of cracking gas
Point, such as when cracking lightweight material naphtha, the dew point of cracking gas is about 350 DEG C or so, and this requires rapid-cooling heat exchanger to export
Temperature should be higher than that 350 DEG C, and for cracked gas raw material, the dew point of cracking gas is lower, and be steamed less than cooling medium saturation water
The temperature of gas（330 DEG C or so）, then need using multistage chilling technique or the cooling medium using lower temperature, because liquid phase is former
Expect that the dew point of the cracking gas after being cracked with gas raw material is different, the outlet temperature of corresponding rapid-cooling heat exchanger is also different, existing skill
The rapid-cooling heat exchanger of art can only realize the chilling of single liquid phase raw material or pure gas raw material, it is impossible to while taking into account cracking liquid phase
Raw material and gas raw material, will certainly thus reduce utilization rate of equipment and installations, and then increase equipment cost, reduce economic benefit.
The content of the invention
There is above-mentioned technical problem for prior art, the utility model provides a kind of multi-functional cracking rapid-cooling heat exchanger,
The rapid-cooling heat exchanger can not only be that high-temperature gas carries out chilling to cracking stock, additionally it is possible to which cracking stock is entered for high-temperature liquid-phase
Row chilling, significantly improves utilization rate of equipment and installations, reduces equipment cost.
To achieve the above object, the utility model provides following technical scheme：
A kind of multi-functional cracking rapid-cooling heat exchanger, including entrance bobbin carriage, entrance flexible tubesheet, the shell being sequentially connected are provided
Body, outlet flexible tubesheet and outlet bobbin carriage, housing are built-in with connection entrance bobbin carriage and export the heat exchanger tube of bobbin carriage, in addition to positioned at
Downcomer header below housing and the upcast header above housing, downcomer header and upcast header are and housing
Interior connection, cooling medium enters in housing through downcomer header, is excluded after carrying out heat exchange with heat exchanger tube through upcast header；Shell
Body is provided with boiler feedwater inlet close to one end of outlet flexible tubesheet, and housing is given close to one end of entrance flexible tubesheet provided with boiler
Water out, cooling medium enters in housing through boiler feedwater inlet, with heat exchanger tube export through boiler feedwater after heat exchange and arranges
Remove.
Wherein, the both ends in housing are equipped with the water conservancy diversion for the inner surface that can be sufficiently humidified so as to corresponding flexible tubesheet
Structure.
Wherein, flow-guiding structure is located at boiler feedwater inlet respectively and boiler feedwater is exported.
Wherein, downcomer header is connected by multiple introducing pipes uniformly arranged with the cavity of housing, and upcast header leads to
Multiple fairleads uniformly arranged are crossed to connect with the cavity of housing.
Wherein, the bore for introducing pipe and the fairlead is much smaller than the intracavitary footpath of the housing.
Wherein, the pipe that introduces is set with the fairlead in one-to-one corresponding, two neighboring to introduce pipe or two neighboring
Provided with the flowing that can make to enter cracking gas in the cooling medium in housing and heat exchanger tube from boiler feedwater inlet between fairlead
Deflection plate in opposite direction.
Wherein, the deflection plate is provided with being available for the breach that cooling medium flows through, above and below the breach of two neighboring deflection plate is
Interlaced arrangement.
Wherein, the outlet of the entrance and upcast header of downcomer header is equipped with multiple, and each downcomer header enters
Mouth is mounted on the decline interface tube being connected with the port of export of HP steam drum, and the outlet of each upcast header is mounted on and height
Press the rising interface tube of the arrival end connection of drum.
Wherein, the bottom of downcomer header is provided with sewage draining exit, and the top of upcast header is provided with steam vent.
Wherein, boiler feedwater inlet and boiler feedwater outlet are equipped with the bottom of housing.
The beneficial effects of the utility model：
Multi-functional cracking rapid-cooling heat exchanger of the present utility model, entrance bobbin carriage, the entrance that its structure includes being sequentially connected is scratched
Property tube sheet, housing, outlet flexible tubesheet and outlet bobbin carriage, housing be built-in with connection entrance bobbin carriage and outlet bobbin carriage heat exchanger tube,
Also include being located at the downcomer header below housing and the upcast header above housing, downcomer header and tedge connection
Case in housing with connecting；Housing is provided with boiler feedwater inlet close to one end of outlet flexible tubesheet, and housing is flexible close to entrance
One end of tube sheet is exported provided with boiler feedwater.When cracking high-temperature liquid-phase raw material, now close boiler feedwater inlet and boiler is given
Water out, opens the outlet of the entrance and upcast header of downcomer header, water under high pressure is as cooling medium through downcomer header
Excluded again through upcast header into housing, and with forming steam water interface after heat exchanger tube progress heat exchange, so can be real
The chilling of existing high-temperature liquid-phase raw material；When cracking high-temperature gas raw material, the entrance and tedge connection of downcomer header are now closed
The outlet of case, either on or off boiler feedwater inlet and boiler feedwater outlet, boiler feedwater enter as cooling medium through boiler feedwater
Mouth enters in housing, and is excluded with being exported after heat exchanger tube progress heat exchange through boiler feedwater, is so that high-temperature gas original can be achieved
The chilling of material.It follows that rapid-cooling heat exchanger of the present utility model can not only be that high-temperature gas carries out chilling to cracking stock,
It can also be that high-temperature liquid-phase carries out chilling to cracking stock, and then utilization rate of equipment and installations can be significantly improved, reduce equipment cost, from
And realize good economic benefit.
Brief description of the drawings
Fig. 1 is a kind of structural representation of multi-functional cracking rapid-cooling heat exchanger of the present utility model.
Fig. 2 is mplifying structure schematic diagram at A in Fig. 1.
Fig. 3 is mplifying structure schematic diagram at B in Fig. 1.
References of the Fig. 1 into Fig. 3：
1- entrance bobbin carriages；
2- entrance flexible tubesheets；
3- housings；
4- exports flexible tubesheet；
5- exports bobbin carriage；
6- heat exchanger tubes；
7- downcomer headers, 71- introduce pipe, 72- and decline interface tube, 73- sewage draining exits；
8- upcast headers, 81- fairleads, 82- rise interface tube, 83- steam vents；
9- flow-guiding structures；
10- boiler feedwater inlets；
11- boiler feedwaters are exported；
12- deflection plates.
Embodiment
The utility model is described in detail below in conjunction with specific embodiment and accompanying drawing.
A kind of multi-functional cracking rapid-cooling heat exchanger of the present embodiment, as shown in figure 1, its structure includes the entrance being sequentially connected
Bobbin carriage 1, entrance flexible tubesheet 2, housing 3, outlet flexible tubesheet 4 and outlet bobbin carriage 5, housing 3 are built-in with the He of connection entrance bobbin carriage 1
The heat exchanger tube 6 of bobbin carriage 5 is exported, cracking stock enters after the cooling medium heat exchange in heat exchanger tube 6 and housing 3 from entrance bobbin carriage 1,
Flowed out again through exporting bobbin carriage 5（As shown by the arrows in Figure 1）, cracking stock therein include high-temperature liquid-phase raw material or high-temperature gas
Raw material.
As shown in figure 1, rapid-cooling heat exchanger also includes the downcomer header 7 for being located at the lower section of housing 3 and positioned at the top of housing 3
Upcast header 8, the excessively multiple introducing pipes 71 uniformly arranged of downcomer header 7 are connected with the cavity of housing 3, upcast header 8
Connected by multiple fairleads 81 uniformly arranged with the cavity of housing 3, the multiple introducing pipes 71 uniformly arranged and multiple extractions
Pipe 81 not only improves heat exchange efficiency, and heat exchange is more uniformly distributed, and reaches more preferable quenching effect, in addition, introduce pipe 71 with
Fairlead 81 is in setting is corresponded, and so being carried out from the cooling medium for introducing the outflow of pipe 71 with heat exchanger tube 6 can after heat exchange
Fairlead 81 is flowed into as early as possible, the efficiency of heat exchange is further speeded up, and improves quenching effect.
As shown in Figures 2 and 3, two positioned at the left and right ends of housing 3 introduce pipe 71, and its water side is equipped with flow-guiding structure
9, the cooling medium that flow-guiding structure 9 is introduced into the outflow of pipe 71 is guided on corresponding flexible tubesheet as soon as possible, and then can
The inner surface of the flexible tubesheet is sufficiently humidified so as to, can so effective temperature-reducing be carried out to entrance flexible tubesheet 2 and outlet flexible tubesheet 4,
Reduce the temperature distortion of entrance flexible tubesheet 2 and outlet flexible tubesheet 4, it is ensured that it is firm that flexible tubesheet and miscellaneous part are welded
Property.
As shown in figure 1, the outlet of the entrance and upcast header 8 of downcomer header 7 is equipped with two, each down-comer connection
The entrance of case 7 is mounted on the decline interface tube 72 being connected with the port of export of HP steam drum, and the outlet of each upcast header 8 is equal
The rising interface tube 82 being connected with the arrival end of HP steam drum is installed, declines interface tube 72 and rising interface tube 82 is equipped with control
Valve processed.
Water under high pressure in HP steam drum is pooled to downcomer header 7 through declining interface tube 72, and then water under high pressure draws through multiple
Enter pipe 71 to uniformly flow into housing 3 and the progress heat exchange of heat exchanger tube 6, water under high pressure forms the steam-water mixing of high temperature after heat exchange
Thing is quickly introduced to upcast header 8 through multiple fairleads 81, is then discharged into HP steam drum again through rising interface tube 82 again, is formed
One recuperated cycle.
Further, the bottom of downcomer header 7 is additionally provided with the sewage draining exit 73 for blowdown, the top of upcast header 8
Provided with the steam vent 83 for Quick air-discharge.
In the present embodiment, as shown in figure 1, housing 3 is provided with boiler feedwater inlet 10 close to the right-hand member of outlet flexible tubesheet 4,
Housing 3 is provided with boiler feedwater outlet 11 close to the left end of entrance flexible tubesheet 2, and cooling medium enters shell through boiler feedwater inlet 10
In body 3, carried out with heat exchanger tube 6 after heat exchange through the exclusion of boiler feedwater outlet 11, boiler feedwater inlet 10 and boiler feedwater outlet
11 are equipped with control valve.
Deflection plate 12 is provided between two neighboring introducing pipe 71 or two neighboring fairlead 81, deflection plate 12 is provided with and is available for
The breach that cooling medium flows through, and the breach of two neighboring deflection plate 12 is interlaced arrangement up and down, such deflection plate 12 just can
Make to enter the cooling medium in housing 3 with the flow direction of cracking gas in heat exchanger tube 6 on the contrary, so just from boiler feedwater inlet 10
Housing 3, downcomer header 7 and upcast header 8 are full of in cooling medium.
As shown in Figures 2 and 3, boiler feedwater inlet 10 and boiler feedwater outlet 11 are respectively positioned on the bottom of housing 3, and boiler is given
Water inlet 10 is located on the introducing pipe 71 of the right-hand member of housing 3, and boiler feedwater outlet 11 is located at the introducing pipe positioned at the left end of housing 3
On 71, such flow-guiding structure 9 also can be by boiler feedwater inlet 10 and the cooling medium water conservancy diversion as soon as possible of boiler feedwater outlet 11
To flexible tubesheet, and then the inner surface of the flexible tubesheet can be sufficiently humidified so as to.
The rapid-cooling heat exchanger of the present embodiment, when cracking high-temperature liquid-phase raw material, now closes boiler feedwater inlet 10 and pot
Stove feedwater outlet 11, opens and declines interface tube 72 and the water under high pressure risen in interface tube 82, HP steam drum through declining interface tube 72
Downcomer header 7 is pooled to, then water under high pressure is uniformly flowed into housing 3 through multiple introducing pipes 71 and heat exchanger tube 6 carries out hot friendship
Change, water under high pressure forms steam water interface after heat exchange and quickly introduced through multiple fairleads 81 to upcast header 8, then passes through again
Rise interface tube 82 and be discharged into HP steam drum again, form a recuperated cycle, the chilling of high-temperature liquid-phase raw material so can be achieved；
When cracking high-temperature gas raw material, now close and decline interface tube 72 and rising interface tube 82, either on or off boiler feedwater inlet 10
With boiler feedwater outlet 11, boiler feedwater enters in housing 3 as cooling medium through boiler feedwater inlet 10, and boiler feedwater is through folding
Flow plate 12 and be full of housing 3, downcomer header 7 and upcast header 8, boiler feedwater is simultaneously carried out after heat exchange, then pass through with heat exchanger tube 6
Boiler feedwater outlet 11 is excluded, and the chilling of high-temperature gas raw material so can be achieved.It follows that chilling of the present utility model is changed
Hot device can not only be that high-temperature gas carries out chilling to cracking stock, additionally it is possible to be that high-temperature liquid-phase carries out chilling to cracking stock,
And then utilization rate of equipment and installations can be significantly improved, equipment cost is reduced, so as to realize good economic benefit.
When cracking high-temperature gas raw material, as shown in figure 1, because the bore for introducing pipe 71 and fairlead 81 is much smaller than
The intracavitary footpath of housing 3 so that boiler feedwater flows into introducing pipe 71 and the resistance of fairlead 81 is larger, and so most boiler is given
Water all flows after deflection plate 12 in housing 3, and only the boiler feedwater of fraction, which is flowed into, introduces pipe 71 and fairlead 81, so
Just boiler feedwater can be avoided short circuit problem occur in housing 3.Further, since deflection plate 12 flows into part boiler feedwater
Riser header 8, in the case of boiler feedwater power-off, the boiler feedwater for flowing into upcast header 8 is given to the boiler in housing 3
Water plays part supplementary function, and then can be effectively along the long guard time exchanged heat to chilling.
Finally it should be noted that above example is only illustrating the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained with reference to preferred embodiment to the utility model, this area it is general
Lead to it will be appreciated by the skilled person that can be modified to the technical solution of the utility model or equivalent substitution, without departing from this
The spirit and scope of utility model technical scheme.
Claims (10)
1. a kind of multi-functional cracking rapid-cooling heat exchanger, including be sequentially connected entrance bobbin carriage, entrance flexible tubesheet, housing, outlet
Flexible tubesheet and outlet bobbin carriage, housing are built-in with the heat exchanger tube of connection entrance bobbin carriage and outlet bobbin carriage, it is characterised in that：Also include
Downcomer header below housing and the upcast header above housing, downcomer header and upcast header with
Connect, cooling medium enters in housing through downcomer header, arranged after carrying out heat exchange with heat exchanger tube through upcast header in housing
Remove；
Housing is provided with boiler feedwater inlet close to one end of outlet flexible tubesheet, and housing is provided with close to one end of entrance flexible tubesheet
Boiler feedwater is exported, and cooling medium enters in housing through boiler feedwater inlet, is carried out with heat exchanger tube after heat exchange through boiler feedwater
Outlet is excluded.
2. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 1, it is characterized in that：Both ends in housing are all provided with
There is the flow-guiding structure for the inner surface that can be sufficiently humidified so as to corresponding flexible tubesheet.
3. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 2, it is characterized in that：Flow-guiding structure is located at pot respectively
Stove feed-water intake and boiler feedwater outlet.
4. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 1, it is characterized in that：Downcomer header passes through multiple
The introducing pipe uniformly arranged is connected with the cavity of housing, and upcast header passes through multiple fairleads uniformly arranged and the chamber of housing
Body is connected.
5. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 4, it is characterized in that：The pipe that introduces draws with described
The bore of outlet pipe is much smaller than the intracavitary footpath of the housing.
6. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 4, it is characterized in that：The pipe that introduces draws with described
Outlet pipe is in correspond to set, and being provided between two neighboring introducing pipe or two neighboring fairlead can make to enter from boiler feedwater
Mouthful cooling medium deflection plate opposite with the flow direction of cracking gas in heat exchanger tube entered in housing.
7. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 6, it is characterized in that：The deflection plate is provided with and is available for
The breach that cooling medium flows through, the breach of two neighboring deflection plate is interlaced arrangement up and down.
8. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 1, it is characterized in that：The entrance of downcomer header and
The outlet of upcast header is equipped with multiple, and the entrance of each downcomer header is mounted on being connected with the port of export of HP steam drum
Decline interface tube, the outlet of each upcast header is mounted on the rising interface tube being connected with the arrival end of HP steam drum.
9. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 1, it is characterized in that：The bottom of downcomer header is set
There is sewage draining exit, the top of upcast header is provided with steam vent.
10. a kind of multi-functional cracking rapid-cooling heat exchanger according to claim 1, it is characterized in that：Boiler feedwater inlet and pot
Stove feedwater outlet is equipped with the bottom of housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720064904.XU CN206531413U (en) | 2017-01-19 | 2017-01-19 | A kind of multi-functional cracking rapid-cooling heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720064904.XU CN206531413U (en) | 2017-01-19 | 2017-01-19 | A kind of multi-functional cracking rapid-cooling heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN206531413U true CN206531413U (en) | 2017-09-29 |
Family
ID=59918245
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720064904.XU Active CN206531413U (en) | 2017-01-19 | 2017-01-19 | A kind of multi-functional cracking rapid-cooling heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839827A (en) * | 2017-01-19 | 2017-06-13 | 南京天华化学工程有限公司 | A kind of multi-functional cracking rapid-cooling heat exchanger |
| CN110243220A (en) * | 2018-03-08 | 2019-09-17 | 波尔希克有限公司 | Quenching system |
-
2017
- 2017-01-19 CN CN201720064904.XU patent/CN206531413U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839827A (en) * | 2017-01-19 | 2017-06-13 | 南京天华化学工程有限公司 | A kind of multi-functional cracking rapid-cooling heat exchanger |
| CN110243220A (en) * | 2018-03-08 | 2019-09-17 | 波尔希克有限公司 | Quenching system |
| KR20190106798A (en) * | 2018-03-09 | 2019-09-18 | 보르지크 게엠베하 | Quenching system |
| KR102461465B1 (en) | 2018-03-09 | 2022-11-01 | 보르지크 게엠베하 | Quenching system |
| EP3536763B1 (en) | 2018-03-09 | 2023-03-08 | Borsig GmbH | Quench system and process for cooling a cracked gas from a cracking furnace |
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